Annotation of www/security.html, Revision 1.416
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1.106 deraadt 17: <p>
1.294 david 18: <h2><font color="#e00000">Security</font></h2>
19: <hr>
1.1 deraadt 20:
1.406 deraadt 21: For security advisories for specific releases, click below:
1.294 david 22: <p>
1.406 deraadt 23:
1.225 deraadt 24: <a href="#20">2.0</a>,
25: <a href="#21">2.1</a>,
26: <a href="#22">2.2</a>,
27: <a href="#23">2.3</a>,
28: <a href="#24">2.4</a>,
29: <a href="#25">2.5</a>,
30: <a href="#26">2.6</a>,
31: <a href="#27">2.7</a>,
32: <a href="#28">2.8</a>,
33: <a href="#29">2.9</a>,
34: <a href="#30">3.0</a>,
35: <a href="#31">3.1</a>,
1.246 deraadt 36: <a href="#32">3.2</a>,
1.261 david 37: <a href="#33">3.3</a>,
1.387 miod 38: <a href="#34">3.4</a>,
1.388 miod 39: <a href="#35">3.5</a>,
1.406 deraadt 40: <a href="#36">3.6</a>,
1.365 deraadt 41: <br>
1.318 deraadt 42: <a href="#37">3.7</a>,
1.321 brad 43: <a href="#38">3.8</a>,
1.334 brad 44: <a href="#39">3.9</a>,
1.348 merdely 45: <a href="#40">4.0</a>,
46: <a href="#41">4.1</a>,
1.357 brad 47: <a href="#42">4.2</a>,
1.365 deraadt 48: <a href="#43">4.3</a>,
1.377 tobias 49: <a href="#44">4.4</a>,
1.378 jasper 50: <a href="#45">4.5</a>,
1.385 jasper 51: <a href="#46">4.6</a>,
1.387 miod 52: <a href="#47">4.7</a>,
53: <a href="#48">4.8</a>,
1.390 sthen 54: <a href="#49">4.9</a>,
55: <a href="#50">5.0</a>,
1.394 lum 56: <a href="#51">5.1</a>,
1.395 sthen 57: <a href="#52">5.2</a>,
1.398 sthen 58: <a href="#53">5.3</a>,
1.406 deraadt 59: <br>
1.405 deraadt 60: <a href="#54">5.4</a>,
61: <a href="#55">5.5</a>.
1.406 deraadt 62: <br>
1.56 deraadt 63: <hr>
64:
1.294 david 65: <a name="goals"></a>
1.278 deraadt 66: <ul>
1.406 deraadt 67: <li><h3><font color="#e00000">Goals</font></h3><p>
1.22 deraadt 68:
1.14 deraadt 69: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 70: ONE in the industry for security (if we are not already there). Our
71: open software development model permits us to take a more
72: uncompromising view towards increased security than Sun, SGI, IBM, HP,
73: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 74: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 75: cryptography</a>, we are able to take cryptographic approaches towards
76: fixing security problems.<p>
1.18 deraadt 77:
1.288 matthieu 78: <a name="disclosure"></a>
1.294 david 79: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 80:
1.45 deraadt 81: Like many readers of the
1.196 jufi 82: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 83: BUGTRAQ mailing list</a>,
1.106 deraadt 84: we believe in full disclosure of security problems. In the
85: operating system arena, we were probably the first to embrace
86: the concept. Many vendors, even of free software, still try
87: to hide issues from their users.<p>
88:
89: Security information moves very fast in cracker circles. On the other
90: hand, our experience is that coding and releasing of proper security
91: fixes typically requires about an hour of work -- very fast fix
92: turnaround is possible. Thus we think that full disclosure helps the
93: people who really care about security.<p>
94:
1.288 matthieu 95: <a name="process"></a>
1.294 david 96: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 97:
1.12 deraadt 98: Our security auditing team typically has between six and twelve
1.45 deraadt 99: members who continue to search for and fix new security holes. We
100: have been auditing since the summer of 1996. The process we follow to
101: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 102: every critical software component. We are not so much looking for
103: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 104: years later someone discovers the problem used to be a security
1.106 deraadt 105: issue, and we fixed it because it was just a bug, well, all the
106: better. Flaws have been found in just about every area of the system.
107: Entire new classes of security problems have been found during our
108: audit, and often source code which had been audited earlier needs
109: re-auditing with these new flaws in mind. Code often gets audited
110: multiple times, and by multiple people with different auditing
111: skills.<p>
1.12 deraadt 112:
1.94 deraadt 113: Some members of our security auditing team worked for Secure Networks,
114: the company that made the industry's premier network security scanning
115: software package Ballista (Secure Networks got purchased by Network
116: Associates, Ballista got renamed to Cybercop Scanner, and well...)
117: That company did a lot of security research, and thus fit in well
1.106 deraadt 118: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
119: colours since day 1.<p>
1.31 deraadt 120:
1.34 deraadt 121: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 122: In most cases we have found that the determination of exploitability
123: is not an issue. During our ongoing auditing process we find many
124: bugs, and endeavor to fix them even though exploitability is not
125: proven. We fix the bug, and we move on to find other bugs to fix. We
126: have fixed many simple and obvious careless programming errors in code
127: and only months later discovered that the problems were in fact
128: exploitable. (Or, more likely someone on
1.197 jufi 129: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 130: would report that other operating systems were vulnerable to a `newly
131: discovered problem', and then it would be discovered that OpenBSD had
132: been fixed in a previous release). In other cases we have been saved
133: from full exploitability of complex step-by-step attacks because we
134: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 135: managed such a success is the lpd advisory that Secure Networks put out.
136: <p>
1.29 deraadt 137:
1.288 matthieu 138: <a name="newtech"></a>
1.294 david 139: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 140:
141: As we audit source code, we often invent new ways of solving problems.
142: Sometimes these ideas have been used before in some random application
143: written somewhere, but perhaps not taken to the degree that we do.
144: <p>
145:
146: <ul>
147: <li>strlcpy() and strlcat()
148: <li>Memory protection purify
149: <ul>
150: <li>W^X
151: <li>.rodata segment
152: <li>Guard pages
153: <li>Randomized malloc()
154: <li>Randomized mmap()
155: <li>atexit() and stdio protection
156: </ul>
1.295 otto 157: <li>Privilege separation
1.278 deraadt 158: <li>Privilege revocation
159: <li>Chroot jailing
160: <li>New uids
161: <li>ProPolice
162: <li>... and others
163: </ul>
164: <p>
165:
1.294 david 166: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 167:
1.45 deraadt 168: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 169: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 170: commonplace in security forums like
1.197 jufi 171: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 172:
1.45 deraadt 173: The most intense part of our security auditing happened immediately
1.80 espie 174: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 175: over the last third of 1996 and first half of 1997. Thousands (yes,
176: thousands) of security issues were fixed rapidly over this year-long
177: period; bugs like the standard buffer overflows, protocol
178: implementation weaknesses, information gathering, and filesystem
179: races. Hence most of the security problems that we encountered were
180: fixed before our 2.1 release, and then a far smaller number needed
181: fixing for our 2.2 release. We do not find as many problems anymore,
182: it is simply a case of diminishing returns. Recently the security
183: problems we find and fix tend to be significantly more obscure or
184: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 185:
1.35 deraadt 186: <ul>
1.45 deraadt 187: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 188: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 189: to search for more complicated exploits, so we will too.
190: <li>Finding and fixing subtle flaws in complicated software is
191: a lot of fun.
1.35 deraadt 192: </ul>
1.106 deraadt 193: <p>
1.15 deraadt 194:
1.14 deraadt 195: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 196: to find and fix new security flaws.<p>
1.12 deraadt 197:
1.288 matthieu 198: <a name="default"></a>
1.294 david 199: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 200:
201: To ensure that novice users of OpenBSD do not need to become security
202: experts overnight (a viewpoint which other vendors seem to have), we
203: ship the operating system in a Secure by Default mode. All non-essential
204: services are disabled. As the user/administrator becomes more familiar
205: with the system, he will discover that he has to enable daemons and other
206: parts of the system. During the process of learning how to enable a new
207: service, the novice is more likely to learn of security considerations.<p>
208:
209: This is in stark contrast to the increasing number of systems that
210: ship with NFS, mountd, web servers, and various other services enabled
211: by default, creating instantaneous security problems for their users
212: within minutes after their first install.<p>
213:
1.288 matthieu 214: <a name="crypto"></a>
1.294 david 215: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 216:
217: And of course, since the OpenBSD project is based in Canada, it is possible
218: for us to integrate cryptography. For more information, read the page
1.116 deraadt 219: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 220:
1.294 david 221: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 222:
1.407 deraadt 223: <li><a name="55"></a>
224: <h3><font color="#e00000">OpenBSD 5.5 Security Advisories</font></h3>
225: These are the OpenBSD 5.5 advisories -- all these problems are solved
226: in <a href=anoncvs.html>OpenBSD current</a> and the
227: <a href=stable.html>patch branch</a>.
228: <p>
229:
230: <ul>
231: <li><a href="errata55.html#001_icmp">March 15, 2014:
232: Memory corruption happens during
233: ICMP reflection handling. ICMP reflection is disabled by default.</a>
1.408 deraadt 234: <li><a href="errata55.html#002_openssl">April 7, 2014:
235: Missing bounds checking in OpenSSL's implementation of the TLS/DTLS
236: heartbeat extension (RFC6520) which can result in a leak of memory contents.</a>
1.409 jca 237: <li><a href="errata55.html#003_ftp">April 9, 2014: ftp(1) defect,
238: failure to check the server hostname when connecting to an https
239: website, allowing any trusted CA-signed certificate to impersonate
240: any other website.</a>
1.410 deraadt 241: <li><a href="errata55.html#004_openssl">April 12, 2014:
242: A use-after-free race condition in OpenSSL's read buffer may permit
243: an attacker to inject data from one connection into another.</a>
1.411 deraadt 244: <li><a href="errata55.html#005_openssl">May 1, 2014:
245: An attacker can trigger generation of an SSL alert which could
246: cause a null pointer dereference.</a>
1.414 deraadt 247: <li><a href="errata55.html#006_libXfont">May 24, 2014:
248: X Font Service Protocol & Font metadata file handling issues
249: in libXfont.</a>
1.415 deraadt 250: <li><a href="errata55.html#007_sendmail">June 6, 2014:
251: Sendmail was not properly closing file descriptions
252: before executing programs.</a>
1.416 ! deraadt 253: <li><a href="errata55.html#008_openssl">June 5, 2014:
! 254: This patch contains a number of SSL library fixes.</a>
1.407 deraadt 255: </ul>
1.398 sthen 256:
1.407 deraadt 257: <li><a name="54"></a>
1.398 sthen 258: <h3><font color="#e00000">OpenBSD 5.4 Security Advisories</font></h3>
259: These are the OpenBSD 5.4 advisories -- all these problems are solved
260: in <a href=anoncvs.html>OpenBSD current</a> and the
261: <a href=stable.html>patch branch</a>.
262:
263: <p>
264: <ul>
265: <li><a href="errata54.html#002_sshgcm">November 7, 2013:
266: Memory corruption in post-authentication sshd process if AES-GCM cipher
267: is selected</a>
268: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
269: <li><a href="errata54.html#004_nginx">November 21, 2013:
270: Security restriction bypass in certain nginx(8) configurations</a>
271: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
1.403 sthen 272: <li><a href="errata54.html#006_libXfont">January 10, 2014:
1.400 matthieu 273: Buffer overflow in parsing of BDF font files</a>
1.401 matthieu 274: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6462">CVE-2013-6462</a>).
1.408 deraadt 275: <li><a href="errata54.html#007_openssl">April 7, 2014:
276: Missing bounds checking in OpenSSL's implementation of the TLS/DTLS
277: heartbeat extension (RFC6520) which can result in a leak of memory contents.</a>
1.410 deraadt 278: <li><a href="errata54.html#008_openssl">April 12, 2014:
279: A use-after-free race condition in OpenSSL's read buffer may permit
280: an attacker to inject data from one connection into another.</a>
1.411 deraadt 281: <li><a href="errata54.html#009_openssl">May 1, 2014:
282: An attacker can trigger generation of an SSL alert which could
283: cause a null pointer dereference.</a>
1.414 deraadt 284: <li><a href="errata54.html#010_libXfont">May 24, 2014:
285: X Font Service Protocol & Font metadata file handling issues
286: in libXfont.</a>
1.415 deraadt 287: <li><a href="errata54.html#011_sendmail">June 6, 2014:
288: Sendmail was not properly closing file descriptions
289: before executing programs.</a>
1.416 ! deraadt 290: <li><a href="errata54.html#012_openssl">June 5, 2014:
! 291: This patch contains a number of SSL library fixes.</a>
1.398 sthen 292: </ul>
293:
1.412 miod 294: <br><p><b>
295: OpenBSD 5.3 and earlier releases are not supported anymore. The following
296: paragraphs only list advisories issued while they were maintained; these
297: releases are likely to be affected by the advisories for more recent releases.
298: </b>
299: <p>
300:
1.407 deraadt 301: <li><a name="53"></a>
1.395 sthen 302: <h3><font color="#e00000">OpenBSD 5.3 Security Advisories</font></h3>
303: These are the OpenBSD 5.3 advisories -- all these problems are solved
304: in <a href=anoncvs.html>OpenBSD current</a> and the
305: <a href=stable.html>patch branch</a>.
306:
307: <p>
308: <ul>
1.398 sthen 309: <li><a href="errata53.html#009_sshgcm">November 7, 2013:
310: Memory corruption in post-authentication sshd process if AES-GCM cipher
311: is selected</a>
312: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
313: <li><a href="errata53.html#011_nginx">November 21, 2013:
314: Security restriction bypass in certain nginx(8) configurations</a>
315: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
1.403 sthen 316: <li><a href="errata53.html#013_libXfont">January 10, 2014:
1.402 matthieu 317: Buffer overflow in parsing of BDF font files</a>
318: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6462">CVE-2013-6462</a>).
1.408 deraadt 319: <li><a href="errata53.html#014_openssl">April 7, 2014:
320: Missing bounds checking in OpenSSL's implementation of the TLS/DTLS
321: heartbeat extension (RFC6520) which can result in a leak of memory contents.</a>
1.410 deraadt 322: <li><a href="errata54.html#015_openssl">April 12, 2014:
323: A use-after-free race condition in OpenSSL's read buffer may permit
324: an attacker to inject data from one connection into another.</a>
1.395 sthen 325: </ul>
1.399 deraadt 326:
1.395 sthen 327: <li>
1.393 sthen 328: <a name="52"></a>
329:
330: <h3><font color="#e00000">OpenBSD 5.2 Security Advisories</font></h3>
331: These are the OpenBSD 5.2 advisories -- all these problems are solved
332: in <a href=anoncvs.html>OpenBSD current</a> and the
333: <a href=stable.html>patch branch</a>.
334:
335: <p>
336: <ul>
337: None yet!
338: </ul>
339:
340: <li>
1.390 sthen 341: <a name="51"></a>
342:
343: <h3><font color="#e00000">OpenBSD 5.1 Security Advisories</font></h3>
344: These are the OpenBSD 5.1 advisories -- all these problems are solved
345: in <a href=anoncvs.html>OpenBSD current</a> and the
346: <a href=stable.html>patch branch</a>.
347:
348: <p>
349: <ul>
1.393 sthen 350: <li><a href="errata51.html#001_libcrypto">April 23, 2012:
351: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 352: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.390 sthen 353: </ul>
354:
355: <li>
1.388 miod 356: <a name="50"></a>
357:
358: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
359: These are the OpenBSD 5.0 advisories -- all these problems are solved
360: in <a href=anoncvs.html>OpenBSD current</a> and the
361: <a href=stable.html>patch branch</a>.
362:
363: <p>
364: <ul>
1.393 sthen 365: <li><a href="errata50.html#002_libcrypto">April 23, 2012:
366: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 367: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.388 miod 368: </ul>
369:
370: <li>
1.387 miod 371: <a name="49"></a>
372:
373: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
374: These are the OpenBSD 4.9 advisories -- all these problems are solved
375: in <a href=anoncvs.html>OpenBSD current</a> and the
376: <a href=stable.html>patch branch</a>.
377:
378: <p>
379: <ul>
380: None yet!
381: </ul>
382:
383: <li>
384: <a name="48"></a>
385:
386: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
387: These are the OpenBSD 4.8 advisories -- all these problems are solved
388: in <a href=anoncvs.html>OpenBSD current</a> and the
389: <a href=stable.html>patch branch</a>.
390:
391: <p>
392: <ul>
393: <li><a href="errata48.html#009_pf">February 16, 2011:
394: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
395: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
396: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
397: prefixes "10.1.1.1/30") are not affected.</a>
398: <li><a href="errata48.html#008_openssl">February 11, 2011:
399: An incorrectly formatted ClientHello handshake message could cause
400: OpenSSL to parse past the end of the message. An attacker could use
401: this flaw to trigger an invalid memory access, causing a crash of an
402: application linked to OpenSSL. As well, certain applications may expose
403: the contents of parsed OCSP extensions, specifically the OCSP nonce
404: extension.
405: <br>
406: Applications are only affected if they act as a server and call
407: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
408: that nothing in the base OS uses this. Apache httpd started using this
409: in v2.3.3; this is newer than the version in ports.</a>
410: <li><a href="errata48.html#005_pf">December 17, 2010:
411: Insufficent initialization of the pf rule structure in the ioctl
412: handler may allow userland to modify kernel memory. By default root
413: privileges are needed to add or modify pf rules.</a>
414: </ul>
415:
416: <li>
1.385 jasper 417: <a name="47"></a>
418:
419: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
420: These are the OpenBSD 4.7 advisories -- all these problems are solved
421: in <a href=anoncvs.html>OpenBSD current</a> and the
422: <a href=stable.html>patch branch</a>.
423:
424: <p>
425: <ul>
1.387 miod 426: <li><a href="errata47.html#013_pf">February 16, 2011:
427: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
428: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
429: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
430: prefixes "10.1.1.1/30") are not affected.</a>
431: <li><a href="errata47.html#012_openssl">February 11, 2011:
432: An incorrectly formatted ClientHello handshake message could cause
433: OpenSSL to parse past the end of the message. An attacker could use
434: this flaw to trigger an invalid memory access, causing a crash of an
435: application linked to OpenSSL. As well, certain applications may expose
436: the contents of parsed OCSP extensions, specifically the OCSP nonce
437: extension.
438: <br>
439: Applications are only affected if they act as a server and call
440: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
441: that nothing in the base OS uses this. Apache httpd started using this
442: in v2.3.3; this is newer than the version in ports.</a>
443: <li><a href="errata47.html#009_pf">December 17, 2010:
444: Insufficent initialization of the pf rule structure in the ioctl
445: handler may allow userland to modify kernel memory. By default root
446: privileges are needed to add or modify pf rules.</a>
447: <li><a href="errata47.html#004_pfsync">April 23, 2010:
448: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 449: <li><a href="errata47.html#003_openssl">April 14, 2010:
450: In TLS connections, certain incorrectly formatted records can
451: cause an OpenSSL client or server to crash due to a read
1.392 tobias 452: attempt at NULL.</a>
1.385 jasper 453: </ul>
454:
455: <li>
1.378 jasper 456: <a name="46"></a>
457:
458: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
459: These are the OpenBSD 4.6 advisories -- all these problems are solved
460: in <a href=anoncvs.html>OpenBSD current</a> and the
461: <a href=stable.html>patch branch</a>.
462:
463: <p>
464: <ul>
1.385 jasper 465: <li><a href="errata46.html#010_openssl">April 14, 2010:
466: In TLS connections, certain incorrectly formatted records can
467: cause an OpenSSL client or server to crash due to a read
1.392 tobias 468: attempt at NULL.</a>
1.384 jasper 469: <li><a href="errata46.html#006_openssl">March 12, 2010:
470: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 471: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 472: <li><a href="errata46.html#004_openssl">November 26, 2009:
473: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 474: related to renegotiation.</a>
1.378 jasper 475: </ul>
1.382 tobias 476:
477: <li>
1.373 djm 478: <a name="45"></a>
479:
480: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
481: These are the OpenBSD 4.5 advisories -- all these problems are solved
482: in <a href=anoncvs.html>OpenBSD current</a> and the
483: <a href=stable.html>patch branch</a>.
484:
485: <p>
486: <ul>
1.385 jasper 487: <li><a href="errata45.html#016_openssl">April 14, 2010:
488: In TLS connections, certain incorrectly formatted records can
489: cause an OpenSSL client or server to crash due to a read
1.392 tobias 490: attempt at NULL.</a>
1.385 jasper 491: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 492: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 493: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 494: <li><a href="errata45.html#010_openssl">November 26, 2009:
495: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 496: related to renegotiation.</a>
1.373 djm 497: </ul>
498:
499: <li>
1.365 deraadt 500: <a name="44"></a>
501:
502: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
503: These are the OpenBSD 4.4 advisories -- all these problems are solved
504: in <a href=anoncvs.html>OpenBSD current</a> and the
505: <a href=stable.html>patch branch</a>.
506:
507: <p>
508: <ul>
1.372 millert 509: <li><a href="errata44.html#011_sudo">February 22, 2009:
510: sudo(8) may allow a user listed in sudoers to run a command
511: as a different user than their access rule specifies when a Unix
512: group is used in the RunAs portion of the rule.</a>
1.370 djm 513: <li><a href="errata44.html#008_bind">January 15, 2009:
514: named(8) suffered from a similar logic error that may allow
515: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 516: <li><a href="errata44.html#007_openssl">January 9, 2009:
517: OpenSSL suffered from some logic errors that allowed bypass
518: of DSA/ECDSA certificate validation.</a>
1.367 brad 519: <li><a href="errata44.html#001_ndp">November 2, 2008:
520: The Neighbor Discovery Protocol (ndp) did not correctly verify
521: neighbor solicitation requests maybe allowing a nearby attacker
522: to intercept traffic.</a>
1.365 deraadt 523: </ul>
524:
525: <li>
1.357 brad 526: <a name="43"></a>
527:
528: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
529: These are the OpenBSD 4.3 advisories -- all these problems are solved
530: in <a href=anoncvs.html>OpenBSD current</a> and the
531: <a href=stable.html>patch branch</a>.
532:
533: <p>
534: <ul>
1.372 millert 535: <li><a href="errata43.html#011_sudo">February 22, 2009:
536: sudo(8) may allow a user listed in sudoers to run a command
537: as a different user than their access rule specifies when a Unix
538: group is used in the RunAs portion of the rule.</a>
1.370 djm 539: <li><a href="errata43.html#008_bind">January 15, 2009:
540: named(8) suffered from a similar logic error that may allow
541: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 542: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 543: OpenSSL suffered from some logic errors that allowed bypass
544: of DSA/ECDSA certificate validation.</a>
1.382 tobias 545: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 546: The Neighbor Discovery Protocol (ndp) did not correctly verify
547: neighbor solicitation requests maybe allowing a nearby attacker
548: to intercept traffic.</a>
1.362 brad 549: <li><a href="errata43.html#004_bind">July 23, 2008:
550: A vulnerability has been found with BIND.</a>
1.361 brad 551: <li><a href="errata43.html#003_xorg">July 15, 2008:
552: Multiple vulnerabilities in X.Org.</a>
1.359 brad 553: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 554: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 555: <li><a href="errata43.html#001_openssh">March 30, 2008:
556: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 557: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 558: </ul>
559:
560: <li>
1.348 merdely 561: <a name="42"></a>
562: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
563: These are the OpenBSD 4.2 advisories -- all these problems are solved
564: in <a href=anoncvs.html>OpenBSD current</a> and the
565: <a href=stable.html>patch branch</a>.
566:
567: <p>
568: <ul>
1.364 tobias 569: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 570: The Neighbor Discovery Protocol (ndp) did not correctly verify
571: neighbor solicitation requests maybe allowing a nearby attacker
572: to intercept traffic.</a>
1.362 brad 573: <li><a href="errata42.html#013_bind">July 23, 2008:
574: A vulnerability has been found with BIND.</a>
1.361 brad 575: <li><a href="errata42.html#012_xorg2">July 15, 2008:
576: Multiple vulnerabilities in X.Org.</a>
1.359 brad 577: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 578: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 579: <li><a href="errata42.html#010_openssh">March 30, 2008:
580: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 581: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 582: <li><a href="errata42.html#009_ppp">March 7, 2008:
583: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 584: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
585: Multiple vulnerabilities in X.Org.</a>
1.351 okan 586: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
587: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 588: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 589: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 590: </ul>
591:
592: <li>
1.346 matthieu 593: <a name="41"></a>
594:
595: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
596: These are the OpenBSD 4.1 advisories -- all these problems are solved
597: in <a href=anoncvs.html>OpenBSD current</a> and the
598: <a href=stable.html>patch branch</a>.
599:
600: <p>
601: <ul>
1.359 brad 602: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 603: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 604: <li><a href="errata41.html#015_openssh">March 30, 2008:
605: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 606: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 607: <li><a href="errata41.html#014_ppp">March 7, 2008:
608: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 609: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
610: Multiple vulnerabilities in X.Org.</a>
611: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
612: The SSL_get_shared_ciphers() function in OpenSSL contains
613: an off-by-one overflow.</a>
1.350 deraadt 614: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 615: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 616: <li><a href="errata41.html#009_file">Jul 9, 2007:
617: Fix possible heap overflow in file(1).</a>
1.346 matthieu 618: <li><a href="errata41.html#005_route6">Apr 27, 2007:
619: IPv6 type 0 route headers can be used to mount a DoS attack
620: against hosts and networks.</a>
621: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
622: Multiple vulnerabilities in X.Org.</a>
623: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
624: Incorrect mbuf handling for ICMP6 packets.</a>
625: </ul>
626:
627: <li>
1.334 brad 628: <a name="40"></a>
629: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
630: These are the OpenBSD 4.0 advisories -- all these problems are solved
631: in <a href=anoncvs.html>OpenBSD current</a> and the
632: <a href=stable.html>patch branch</a>.
633:
634: <p>
635: <ul>
1.382 tobias 636: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
637: The SSL_get_shared_ciphers() function in OpenSSL contains an
638: off-by-one overflow.</a>
1.350 deraadt 639: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 640: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 641: <li><a href="errata40.html#015_file">Jul 9, 2007:
642: Fix possible heap overflow in file(1).</a>
1.343 deraadt 643: <li><a href="errata40.html#012_route6">Apr 23, 2007:
644: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 645: against hosts and networks.</a>
1.342 mbalmer 646: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
647: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 648: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
649: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 650: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 651: Insufficient validation in vga(4) may allow an attacker to gain
652: root privileges on some i386 systems.</a>
1.339 deraadt 653: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 654: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 655: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 656: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
657: found by Chris Evans.</a>
1.339 deraadt 658: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 659: Several problems have been found in OpenSSL.</a>
1.339 deraadt 660: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 661: httpd(8) does not sanitize the Expect header from an HTTP request
662: when it is reflected back in an error message, which might allow
663: cross-site scripting (XSS) style attacks.</a>
664: </ul>
665:
666: <li>
1.321 brad 667: <a name="39"></a>
668:
669: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
670: These are the OpenBSD 3.9 advisories -- all these problems are solved
671: in <a href=anoncvs.html>OpenBSD current</a> and the
672: <a href=stable.html>patch branch</a>.
673:
674: <p>
675: <ul>
1.343 deraadt 676: <li><a href="errata39.html#022_route6">Apr 23, 2007:
677: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 678: against hosts and networks.</a>
1.342 mbalmer 679: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
680: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 681: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
682: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 683: <li><a href="errata39.html#agp">Jan 3, 2007:
684: Insufficient validation in vga(4) may allow an attacker to gain
685: root privileges on some i386 systems.</a>
1.336 brad 686: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 687: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 688: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 689: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 690: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 691: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 692: found by Chris Evans.</a>
1.333 deraadt 693: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 694: Several problems have been found in OpenSSL.</a>
1.333 deraadt 695: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 696: httpd(8) does not sanitize the Expect header from an HTTP request
697: when it is reflected back in an error message, which might allow
698: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 699: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 700: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
701: possible for an attacker to construct an invalid signature which
702: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 703: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 704: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 705: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 706: Due to the failure to correctly validate LCP configuration option
707: lengths, it is possible for an attacker to send LCP packets via an
708: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 709: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 710: A problem in isakmpd(8) caused IPsec to run partly without replay
711: protection.</a>
1.333 deraadt 712: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 713: It is possible to cause the kernel to panic when more than the default
714: number of sempahores have been allocated.</a>
1.333 deraadt 715: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 716: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
717: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
718: option.</a>
1.333 deraadt 719: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 720: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 721: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 722: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
723: overflow.</a>
1.333 deraadt 724: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 725: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 726: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 727: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 728: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 729: A race condition has been reported to exist in the handling by sendmail
730: of asynchronous signals.</a>
731: </ul>
732:
733: <li>
1.318 deraadt 734: <a name="38"></a>
735:
736: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
1.413 matthieu 737: These are the OpenBSD 3.8 advisories -- all these problems are solved
1.318 deraadt 738: in <a href=anoncvs.html>OpenBSD current</a> and the
739: <a href=stable.html>patch branch</a>.
740:
741: <p>
742: <ul>
1.332 brad 743: <li><a href="errata38.html#ssh2">Oct 12, 2006:
744: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 745: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 746: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 747: found by Chris Evans.</a>
748: <li><a href="errata38.html#openssl2">Oct 7, 2006:
749: Several problems have been found in OpenSSL.</a>
750: <li><a href="errata38.html#httpd2">Oct 7, 2006:
751: httpd(8) does not sanitize the Expect header from an HTTP request
752: when it is reflected back in an error message, which might allow
753: cross-site scripting (XSS) style attacks.</a>
1.329 brad 754: <li><a href="errata38.html#openssl">Sep 8, 2006:
755: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
756: possible for an attacker to construct an invalid signature which
757: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 758: <li><a href="errata38.html#bind">Sep 8, 2006:
759: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 760: <li><a href="errata38.html#sppp">Sep 2, 2006:
761: Due to the failure to correctly validate LCP configuration option
762: lengths, it is possible for an attacker to send LCP packets via an
763: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 764: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
765: A problem in isakmpd(8) caused IPsec to run partly without replay
766: protection.</a>
767: <li><a href="errata38.html#sem">Aug 25, 2006:
768: It is possible to cause the kernel to panic when more than the default
769: number of sempahores have been allocated.</a>
770: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
771: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
772: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
773: option.</a>
774: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
775: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 776: <li><a href="errata38.html#httpd">Jul 30, 2006:
777: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
778: overflow.</a>
1.324 brad 779: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
780: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 781: <li><a href="errata38.html#xorg">May 2, 2006:
782: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 783: <li><a href="errata38.html#sendmail">Mar 25, 2006:
784: A race condition has been reported to exist in the handling by sendmail
785: of asynchronous signals.</a>
786: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 787: Josh Bressers has reported a weakness in OpenSSH caused due to the
788: insecure use of the system(3) function in scp(1) when performing copy
789: operations using filenames that are supplied by the user from the
790: command line.</a>
1.321 brad 791: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 792: Do not allow users to trick suid programs into re-opening files via
793: /dev/fd.</a>
1.321 brad 794: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 795: A buffer overflow has been found in the Perl interpreter with the
796: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 797: </ul>
798:
799: <li>
1.312 david 800: <a name="37"></a>
801:
802: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
1.413 matthieu 803: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 804: in <a href="anoncvs.html">OpenBSD current</a>. The
805: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
806: you should update your machine.
1.312 david 807:
808: <p>
809: <ul>
1.322 brad 810: <li><a href="errata37.html#xorg">May 2, 2006:
811: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 812: <li><a href="errata37.html#sendmail">Mar 25, 2006:
813: A race condition has been reported to exist in the handling by sendmail
814: of asynchronous signals.</a>
1.320 brad 815: <li><a href="errata37.html#ssh">Feb 12, 2006:
816: Josh Bressers has reported a weakness in OpenSSH caused due to the
817: insecure use of the system(3) function in scp(1) when performing copy
818: operations using filenames that are supplied by the user from the
819: command line.</a>
1.319 brad 820: <li><a href="errata37.html#fd">Jan 5, 2006:
821: Do not allow users to trick suid programs into re-opening files via
822: /dev/fd.</a>
823: <li><a href="errata37.html#perl">Jan 5, 2006:
824: A buffer overflow has been found in the Perl interpreter with the
825: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 826: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 827: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 828: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 829: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 830: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 831: Fix a race condition in sudo(8) that could allow a user
1.315 millert 832: to run arbitrary commands.</a>
1.318 deraadt 833: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 834: Fix a buffer overflow, memory leaks, and NULL pointer
835: dereference in cvs(1).</a>
1.312 david 836: </ul>
837:
838: <li>
1.301 miod 839: <a name="36"></a>
840:
841: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
1.413 matthieu 842: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 843: in <a href="anoncvs.html">OpenBSD current</a>. The
844: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
845: you should update your machine.
1.301 miod 846:
847: <p>
1.302 markus 848: <ul>
1.317 millert 849: <li><a href="errata36.html#libz2">Jul 21, 2005:
850: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 851: <li><a href="errata36.html#libz">Jul 6, 2005:
852: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 853: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 854: Fix a race condition in sudo(8) that could allow a user
1.315 millert 855: to run arbitrary commands.</a>
1.311 deraadt 856: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 857: Fix a buffer overflow, memory leaks, and NULL pointer
858: dereference in cvs(1).</a>
1.311 deraadt 859: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 860: Due to buffer overflows in telnet(1), a malicious
861: server or man-in-the-middle attack could allow
862: execution of arbitrary code with the privileges of
863: the user invoking telnet(1).</a>
1.311 deraadt 864: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 865: More stringent checking should be done in the copy(9)
866: functions to prevent their misuse.</a>
1.311 deraadt 867: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 868: More stringent checking should be done in the copy(9)
869: functions to prevent their misuse.</a>
1.311 deraadt 870: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 871: httpd(8)'s mod_include module fails to properly validate
872: the length of user supplied tag strings prior to copying
1.305 brad 873: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 874: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 875: On systems running isakmpd(8) it is possible for a local
876: user to cause kernel memory corruption and system panic by
1.303 markus 877: setting ipsec(4) credentials on a socket.</a>
1.302 markus 878: </ul>
1.301 miod 879:
880: <li>
1.288 matthieu 881: <a name="35"></a>
1.279 deraadt 882:
1.294 david 883: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.413 matthieu 884: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 885: in <a href="anoncvs.html">OpenBSD current</a>. The
886: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
887: you should update your machine.
1.279 deraadt 888:
889: <p>
890: <ul>
1.310 brad 891: <li><a href="errata35.html#cvs4">Apr 28, 2005:
892: Fix a buffer overflow, memory leaks, and NULL pointer
893: dereference in cvs(1).</a>
1.309 brad 894: <li><a href="errata35.html#telnet">Mar 30, 2005:
895: Due to buffer overflows in telnet(1), a malicious
896: server or man-in-the-middle attack could allow
897: execution of arbitrary code with the privileges of
898: the user invoking telnet(1).</a>
1.308 brad 899: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 900: More stringent checking should be done in the copy(9)
901: functions to prevent their misuse.</a>
1.306 brad 902: <li><a href="errata35.html#locore">Feb 28, 2005:
903: More stringent checking should be done in the copy(9)
904: functions to prevent their misuse.</a>
1.304 brad 905: <li><a href="errata35.html#httpd3">Jan 12, 2005:
906: httpd(8)'s mod_include module fails to properly validate
907: the length of user supplied tag strings prior to copying
1.305 brad 908: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 909: <li><a href="errata35.html#pfkey">Dec 14, 2004:
910: On systems running isakmpd(8) it is possible for a local
911: user to cause kernel memory corruption and system panic by
1.303 markus 912: setting ipsec(4) credentials on a socket.</a>
1.301 miod 913: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 914: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 915: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 916: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 917: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 918: httpd(8)'s mod_rewrite module can be made to write one zero byte in
919: an arbitrary memory position outside of a char array, causing a DoS
920: or possibly buffer overflows.</a>
1.301 miod 921: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 922: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 923: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 924: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 925: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 926: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 927: Multiple remote vulnerabilities have been found in the cvs(1)
928: server which can be used by CVS clients to crash or execute
1.293 brad 929: arbitrary code on the server.</a>
1.301 miod 930: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 931: kdc(8) performs inadequate checking of request fields, leading
932: to the possibility of principal impersonation from other
933: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 934: <li><a href="errata35.html#xdm"> May 26, 2004:
1.413 matthieu 935: xdm(1) ignores the requestPort resource and creates a
1.293 brad 936: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 937: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 938: A buffer overflow in the cvs(1) server has been found,
939: which can be used by CVS clients to execute arbitrary code on
1.293 brad 940: the server.</a>
1.301 miod 941: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 942: Integer overflow problems were found in procfs, allowing
1.293 brad 943: reading of arbitrary kernel memory.</a>
1.301 miod 944: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 945: Pathname validation problems have been found in cvs(1),
946: allowing clients and servers access to files outside the
1.293 brad 947: repository or local CVS tree.</a>
1.279 deraadt 948: </ul>
949:
950: <p>
951: <li>
1.288 matthieu 952: <a name="34"></a>
1.261 david 953:
1.294 david 954: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.413 matthieu 955: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 956: in <a href="anoncvs.html">OpenBSD current</a>. The
957: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
958: you should update your machine.
1.261 david 959: <p>
960: <ul>
1.302 markus 961: <li><a href="errata34.html#pfkey">Dec 14, 2004:
962: On systems running isakmpd(8) it is possible for a local
963: user to cause kernel memory corruption and system panic by
1.303 markus 964: setting ipsec(4) credentials on a socket.</a>
1.298 brad 965: <li><a href="errata34.html#xpm">Sep 16, 2004:
966: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 967: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
968: httpd(8)'s mod_rewrite module can be made to write one zero byte in
969: an arbitrary memory position outside of a char array, causing a DoS
970: or possibly buffer overflows.</a>
1.294 david 971: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 972: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 973: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 974: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 975: an attacker can delete IPsec tunnels at will.</a>
1.294 david 976: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 977: Multiple remote vulnerabilities have been found in the cvs(1)
978: server which can be used by CVS clients to crash or execute
1.293 brad 979: arbitrary code on the server.</a>
1.294 david 980: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 981: kdc(8) performs inadequate checking of request fields, leading
982: to the possibility of principal impersonation from other
983: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 984: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 985: A buffer overflow in the cvs(1) server has been found,
986: which can be used by CVS clients to execute arbitrary code on
987: the server.</a>
1.294 david 988: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 989: Integer overflow problems were found in procfs, allowing
990: reading of arbitrary kernel memory.</a>
1.294 david 991: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 992: Pathname validation problems have been found in cvs(1),
993: allowing clients and servers access to files outside the
994: repository or local CVS tree.</a>
1.294 david 995: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 996: A missing check for a NULL-pointer dereference may allow a
1.281 otto 997: remote attacker to crash applications using OpenSSL.</a>
1.294 david 998: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 999: Defects in the payload validation and processing functions of
1000: isakmpd have been discovered. An attacker could send malformed
1001: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 1002: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 1003: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
1004: access module, using IP addresses without a netmask on big endian
1005: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 1006: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 1007: An IPv6 MTU handling problem exists that could be used by an
1008: attacker to cause a denial of service attack.</a>
1.294 david 1009: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 1010: A reference counting bug in shmat(2) could be used to write to
1011: kernel memory under certain circumstances.</a>
1.294 david 1012: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 1013: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 1014: by Thomas Walpuski.</a>
1.294 david 1015: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 1016: It may be possible for a local user to overrun the stack in
1017: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 1018: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 1019: The use of certain ASN.1 encodings or malformed public keys may
1020: allow an attacker to mount a denial of service attack against
1021: applications linked with ssl(3).</a>
1.261 david 1022: </ul>
1023:
1024: <li>
1.288 matthieu 1025: <a name="33"></a>
1.246 deraadt 1026:
1.294 david 1027: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.413 matthieu 1028: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 1029: in <a href="anoncvs.html">OpenBSD current</a>. The
1030: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 1031: you should update your machine.
1.246 deraadt 1032: <p>
1033: <ul>
1.294 david 1034: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 1035: Pathname validation problems have been found in cvs(1),
1036: allowing clients and servers access to files outside the
1037: repository or local CVS tree.</a>
1.294 david 1038: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 1039: A missing check for a NULL-pointer dereference may allow a
1.281 otto 1040: remote attacker to crash applications using OpenSSL.</a>
1.294 david 1041: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 1042: Defects in the payload validation and processing functions of
1043: isakmpd have been discovered. An attacker could send malformed
1044: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 1045: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 1046: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
1047: access module, using IP addresses without a netmask on big endian
1048: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 1049: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 1050: An IPv6 MTU handling problem exists that could be used by an
1051: attacker to cause a denial of service attack.</a>
1.294 david 1052: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 1053: A reference counting bug in shmat(2) could be used to write to
1054: kernel memory under certain circumstances.</a>
1.294 david 1055: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 1056: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 1057: by Thomas Walpuski.</a>
1.294 david 1058: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.413 matthieu 1059: It may be possible for a local user to execute arbitrary code
1060: resulting in escalation of privileges due to a stack overrun
1.264 henning 1061: in compat_ibcs2(8).</a>
1.294 david 1062: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 1063: The use of certain ASN.1 encodings or malformed public keys may
1064: allow an attacker to mount a denial of service attack against
1065: applications linked with ssl(3).</a>
1.294 david 1066: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.413 matthieu 1067: Access of freed memory in pf(4) could be used to
1.260 margarid 1068: remotely panic a machine using scrub rules.</a>
1.294 david 1069: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 1070: A buffer overflow in the address parsing in
1071: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1072: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 1073: OpenSSH versions prior to 3.7 contains a buffer management error
1074: that is potentially exploitable.</a>
1.294 david 1075: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 1076: Root may be able to reduce the security level by taking advantage of
1077: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 1078: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 1079: An improper bounds check in the kernel may allow a local user
1080: to panic the kernel.</a>
1.294 david 1081: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 1082: An off-by-one error exists in the C library function realpath(3)
1083: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 1084: </ul>
1085:
1.265 miod 1086:
1.247 david 1087: <p>
1.246 deraadt 1088: <li>
1.288 matthieu 1089: <a name="32"></a>
1.224 deraadt 1090:
1.294 david 1091: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.413 matthieu 1092: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 1093: in <a href="anoncvs.html">OpenBSD current</a>. The
1094: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 1095: you should update your machine.
1.224 deraadt 1096: <p>
1097: <ul>
1.294 david 1098: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 1099: The use of certain ASN.1 encodings or malformed public keys may
1100: allow an attacker to mount a denial of service attack against
1101: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 1102: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.413 matthieu 1103: Access of freed memory in pf(4) could be used to
1.260 margarid 1104: remotely panic a machine using scrub rules.</a>
1.294 david 1105: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 1106: A buffer overflow in the address parsing in
1107: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1108: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 1109: OpenSSH versions prior to 3.7 contains a buffer management error
1110: that is potentially exploitable.</a>
1.294 david 1111: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 1112: Fix for a potential security issue in
1113: sendmail(8) with respect to DNS maps.</a>
1.294 david 1114: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1115: An off-by-one error exists in the C library function realpath(3)
1116: may allow an attacker to gain escalated privileges.</a>
1.294 david 1117: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1118: A buffer overflow in the address parsing in
1119: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1120: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1121: A cryptographic weaknesses in the Kerberos v4 protocol can be
1122: exploited on Kerberos v5 as well.</a>
1.294 david 1123: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1124: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1125: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1126: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1127: Various SSL and TLS operations in OpenSSL are vulnerable to
1128: timing attacks.</a>
1.294 david 1129: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1130: A buffer overflow in lprm(1) may allow an attacker to elevate
1.392 tobias 1131: privileges to user daemon.</a>
1.294 david 1132: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1133: A buffer overflow in the envelope comments processing in
1134: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1135: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1136: httpd(8) leaks file inode numbers via ETag header as well as
1137: child PIDs in multipart MIME boundary generation. This could
1138: lead, for example, to NFS exploitation because it uses inode
1139: numbers as part of the file handle.</a>
1.294 david 1140: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1141: In ssl(8) an information leak can occur via timing by performing
1.413 matthieu 1142: a MAC computation even if incorrect block cipher padding has
1.234 margarid 1143: been found, this is a countermeasure. Also, check for negative
1144: sizes, in allocation routines.</a>
1.294 david 1145: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1146: A double free exists in cvs(1) that could lead to privilege
1147: escalation for cvs configurations where the cvs command is
1.233 margarid 1148: run as a privileged user.</a>
1.294 david 1149: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1150: A buffer overflow exists in named(8) that could lead to a
1151: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1152: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1153: A logic error in the pool kernel memory allocator could cause
1154: memory corruption in low-memory situations, causing the system
1155: to crash.</a>
1.294 david 1156: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1157: An attacker can bypass smrsh(8)'s restrictions and execute
1158: arbitrary commands with the privileges of his own account.</a>
1.294 david 1159: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1160: Network bridges running pf with scrubbing enabled could cause
1161: mbuf corruption, causing the system to crash.</a>
1.294 david 1162: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1163: A buffer overflow can occur in the kadmind(8) daemon, leading
1164: to possible remote crash or exploit.</a>
1.224 deraadt 1165: </ul>
1166:
1.227 miod 1167: <p>
1168: <li>
1.288 matthieu 1169: <a name="31"></a>
1.203 deraadt 1170:
1.294 david 1171: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.413 matthieu 1172: These are the OpenBSD 3.1 advisories -- all these problems are solved
1173: in <a href="anoncvs.html">OpenBSD current</a>. The
1.294 david 1174: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1175: you should update your machine.
1.203 deraadt 1176:
1177: <p>
1178: <ul>
1.294 david 1179: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1180: A buffer overflow in the address parsing in
1181: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1182: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1183: A cryptographic weaknesses in the Kerberos v4 protocol can be
1184: exploited on Kerberos v5 as well.</a>
1.294 david 1185: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1186: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1187: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1188: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1189: Various SSL and TLS operations in OpenSSL are vulnerable to
1190: timing attacks.</a>
1.294 david 1191: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1192: A buffer overflow in lprm(1) may allow an attacker to gain
1193: root privileges.</a>
1.294 david 1194: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1195: A buffer overflow in the envelope comments processing in
1196: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1197: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1198: In ssl(8) an information leak can occur via timing by performing
1.413 matthieu 1199: a MAC computation even if incorrect block cipher padding has
1.235 miod 1200: been found, this is a countermeasure. Also, check for negative
1201: sizes, in allocation routines.</a>
1.294 david 1202: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1203: A double free exists in cvs(1) that could lead to privilege
1204: escalation for cvs configurations where the cvs command is
1.392 tobias 1205: run as a privileged user.</a>
1.294 david 1206: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1207: A buffer overflow exists in named(8) that could lead to a
1208: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1209: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1210: Incorrect argument checking in the getitimer(2) system call
1211: may allow an attacker to crash the system.</a>
1.294 david 1212: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1213: An attacker can bypass smrsh(8)'s restrictions and execute
1214: arbitrary commands with the privileges of his own account.</a>
1.294 david 1215: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1216: A buffer overflow can occur in the kadmind(8) daemon, leading
1217: to possible remote crash or exploit.</a>
1.294 david 1218: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1219: Incorrect argument checking in the setitimer(2) system call
1220: may allow an attacker to write to kernel memory.</a>
1.294 david 1221: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1222: An insufficient boundary check in the select system call
1.220 miod 1223: allows an attacker to overwrite kernel memory and execute arbitrary code
1224: in kernel context.</a>
1.294 david 1225: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1226: Several remote buffer overflows can occur in the SSL2 server and SSL3
1227: client of the ssl(8) library, as in the ASN.1 parser code in the
1228: crypto(3) library, all of them being potentially remotely
1229: exploitable.</a>
1.294 david 1230: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1231: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1232: possible remote crash.</a>
1.294 david 1233: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1234: A race condition exists in the pppd(8) daemon which may cause it to
1235: alter the file permissions of an arbitrary file.</a>
1.294 david 1236: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1237: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1238: crash.</a>
1.294 david 1239: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1240: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1241: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1242: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1243: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1244: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1245: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1246: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1247: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1248: input validation error that can result in an integer overflow and
1249: privilege escalation.</a>
1.294 david 1250: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1251: A buffer overflow can occur during the interpretation of chunked
1252: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1253: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1254: Under certain conditions, on systems using YP with netgroups
1255: in the password database, it is possible that sshd(8) does
1256: ACL checks for the requested user name but uses the password
1257: database entry of a different user for authentication. This
1258: means that denied users might authenticate successfully
1259: while permitted users could be locked out.</a>
1.294 david 1260: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1261: A race condition exists that could defeat the kernel's
1262: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1263: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1264: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1265: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1266: A local user can gain super-user privileges due to a buffer
1267: overflow in sshd(8) if AFS has been configured on the system
1268: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1269: in the sshd_config file.</a>
1.203 deraadt 1270: </ul>
1271:
1.235 miod 1272: <p>
1.203 deraadt 1273: <li>
1.288 matthieu 1274: <a name="30"></a>
1.187 deraadt 1275:
1.294 david 1276: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.413 matthieu 1277: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1278: in <a href="anoncvs.html">OpenBSD current</a>. The
1279: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1280: you should update your machine.
1.187 deraadt 1281:
1282: <p>
1283: <ul>
1.294 david 1284: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1285: A buffer overflow exists in named(8) that could lead to a
1286: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1287: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1288: Incorrect argument checking in the getitimer(2) system call
1289: may allow an attacker to crash the system.</a>
1.294 david 1290: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1291: An attacker can bypass smrsh(8)'s restrictions and execute
1292: arbitrary commands with the privileges of his own account.</a>
1.294 david 1293: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1294: A buffer overflow can occur in the kadmind(8) daemon, leading
1295: to possible remote crash or exploit.</a>
1.294 david 1296: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1297: Incorrect argument checking in the setitimer(2) system call
1298: may allow an attacker to write to kernel memory.</a>
1.294 david 1299: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1300: An insufficient boundary check in the select and poll system calls
1301: allows an attacker to overwrite kernel memory and execute arbitrary code
1302: in kernel context.</a>
1.294 david 1303: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1304: Several remote buffer overflows can occur in the SSL2 server and SSL3
1305: client of the ssl(8) library, as in the ASN.1 parser code in the
1306: crypto(3) library, all of them being potentially remotely
1307: exploitable.</a>
1.294 david 1308: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1309: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1310: possible remote crash.</a>
1.294 david 1311: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1312: A race condition exists in the pppd(8) daemon which may cause it to
1313: alter the file permissions of an arbitrary file.</a>
1.294 david 1314: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1315: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1316: crash.</a>
1.294 david 1317: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1318: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1319: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1320: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1321: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1322: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1323: input validation error that can result in an integer overflow and
1324: privilege escalation.</a>
1.294 david 1325: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1326: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1327: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1328: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1329: A buffer overflow can occur during the interpretation of chunked
1330: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1331: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1332: A race condition exists that could defeat the kernel's
1333: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1334: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1335: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1336: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1337: A local user can gain super-user privileges due to a buffer
1338: overflow in sshd(8) if AFS has been configured on the system
1339: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1340: in the sshd_config file.</a>
1.294 david 1341: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1342: The mail(1) was interpreting tilde escapes even when invoked
1343: in non-interactive mode. As mail(1) is called as root from cron,
1344: this can lead to a local root compromise.</a>
1.294 david 1345: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1346: Under certain conditions, on systems using YP with netgroups in
1347: the password database, it is possible for the rexecd(8) and rshd(8)
1348: daemons to execute a shell from a password database entry for a
1349: different user. Similarly, atrun(8) may change to the wrong
1350: home directory when running jobs.</a>
1.294 david 1351: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1352: A potential double free() exists in the zlib library;
1353: this is not exploitable on OpenBSD.
1354: The kernel also contains a copy of zlib; it is not
1355: currently known if the kernel zlib is exploitable.</a>
1.294 david 1356: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1357: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1358: may allow a local user to gain super-user privileges.</a>
1.294 david 1359: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1360: A race condition between the ptrace(2) and execve(2) system calls
1361: allows an attacker to modify the memory contents of suid/sgid
1362: processes which could lead to compromise of the super-user account.</a>
1.294 david 1363: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1364: There is a security hole in sudo(8) that can be exploited
1365: when the Postfix sendmail replacement is installed that may
1366: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1367: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1368: An attacker can trick a machine running the lpd daemon into
1369: creating new files in the root directory from a machine with
1370: remote line printer access.</a>
1.294 david 1371: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1372: The vi.recover script can be abused in such a way as
1373: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1374: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1375: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1376: resulting in a crash.</a>
1.294 david 1377: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1378: A security hole that may allow an attacker to partially authenticate
1379: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1380: </ul>
1381:
1382: <p>
1383: <li>
1.288 matthieu 1384: <a name="29"></a>
1.173 deraadt 1385:
1.294 david 1386: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.413 matthieu 1387: These are the OpenBSD 2.9 advisories -- all these problems are solved
1388: in <a href="anoncvs.html">OpenBSD current</a>. The
1.294 david 1389: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1390: you should update your machine.
1391:
1.173 deraadt 1392:
1393: <p>
1394: <ul>
1.294 david 1395: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1396: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1397: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1398: A race condition exists that could defeat the kernel's
1399: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1400: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1401: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1402: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1403: A local user can gain super-user privileges due to a buffer
1404: overflow in sshd(8) if AFS has been configured on the system
1405: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1406: in the sshd_config file.</a>
1.294 david 1407: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1408: The mail(1) was interpreting tilde escapes even when invoked
1409: in non-interactive mode. As mail(1) is called as root from cron,
1410: this can lead to a local root compromise.</a>
1.294 david 1411: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1412: A potential double free() exists in the zlib library;
1413: this is not exploitable on OpenBSD.
1414: The kernel also contains a copy of zlib; it is not
1415: currently known if the kernel zlib is exploitable.</a>
1.294 david 1416: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1417: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1418: may allow a local user to gain super-user privileges.</a>
1.294 david 1419: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1420: A race condition between the ptrace(2) and execve(2) system calls
1421: allows an attacker to modify the memory contents of suid/sgid
1422: processes which could lead to compromise of the super-user account.</a>
1.294 david 1423: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1424: There is a security hole in sudo(8) that can be exploited
1425: when the Postfix sendmail replacement is installed that may
1426: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1427: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1428: An attacker can trick a machine running the lpd daemon into
1429: creating new files in the root directory from a machine with
1430: remote line printer access.</a>
1.294 david 1431: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1432: The vi.recover script can be abused in such a way as
1433: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1434: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1435: A security hole exists in uuxqt(8) that may allow an
1436: attacker to gain root privileges.</a>
1.294 david 1437: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1438: A security hole exists in lpd(8) that may allow an
1439: attacker to gain root privileges if lpd is running.</a>
1.294 david 1440: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1441: A security hole exists in sendmail(8) that may allow an
1442: attacker on the local host to gain root privileges.</a>
1.294 david 1443: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1444: A kernel buffer overflow in the NFS code can be used to execute
1445: arbitrary code by users with mount privileges (only root by
1.181 millert 1446: default).</a>
1.294 david 1447: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1448: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1449: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1450: sshd(8) allows users to delete arbitrary files named "cookies"
1451: if X11 forwarding is enabled. X11 forwarding is disabled
1452: by default.</a>
1.294 david 1453: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1454: Programs using the fts routines can be tricked into changing
1455: into the wrong directory.</a>
1.294 david 1456: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1457: Sendmail signal handlers contain unsafe code,
1458: leading to numerous race conditions.</a>
1.173 deraadt 1459: </ul>
1460:
1461: <p>
1462: <li>
1.288 matthieu 1463: <a name="28"></a>
1.152 deraadt 1464:
1.294 david 1465: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.413 matthieu 1466: These are the OpenBSD 2.8 advisories -- all these problems are solved
1467: in <a href="anoncvs.html">OpenBSD current</a>. The
1.294 david 1468: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1469: you should update your machine.
1470:
1.152 deraadt 1471:
1472: <p>
1473: <ul>
1.294 david 1474: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1475: A security hole exists in uuxqt(8) that may allow an
1476: attacker to gain root privileges.</a>
1.294 david 1477: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1478: A security hole exists in lpd(8) that may allow an
1479: attacker to gain root privileges if lpd is running.</a>
1.294 david 1480: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1481: A security hole exists in sendmail(8) that may allow an
1482: attacker on the local host to gain root privileges.</a>
1.294 david 1483: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1484: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1485: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1486: Programs using the fts routines can be tricked into changing
1487: into the wrong directory.</a>
1.294 david 1488: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1489: Sendmail signal handlers contain unsafe code,
1490: leading to numerous race conditions.</a>
1.294 david 1491: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1492: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1493: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1494: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1495: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1496: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1497: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1498: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1499: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1500: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1501: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1502: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1503: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1504: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1505: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1506: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1507: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1508: rnd(4) did not use all of its input when written to.</a>
1.294 david 1509: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1510: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1511: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1512: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1513: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1514: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1515: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1516: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1517: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1518: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1519: </ul>
1520:
1521: <p>
1522: <li>
1.288 matthieu 1523: <a name="27"></a>
1.124 deraadt 1524:
1.294 david 1525: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.413 matthieu 1526: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1527: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1528: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1529:
1530: <p>
1531: <ul>
1.294 david 1532: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1533: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1534: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1535: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1536: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1537: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1538: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1539: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1540: (patch included)</a>
1.294 david 1541: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1542: X11 libraries have 2 potential overflows in xtrans code.
1543: (patch included)</a>
1.294 david 1544: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.413 matthieu 1545: Apache mod_rewrite and mod_vhost_alias modules could expose files
1.150 beck 1546: on the server in certain configurations if used.
1547: (patch included)</a>
1.294 david 1548: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1549: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1550: TERMPATH and TERMCAP environment variables as it should.
1551: (patch included)</a>
1.294 david 1552: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1553: There are printf-style format string bugs in several privileged
1554: programs. (patch included)</a>
1.294 david 1555: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1556: libcurses honored terminal descriptions in the $HOME/.terminfo
1557: directory as well as in the TERMCAP environment variable for
1558: setuid and setgid applications.
1.146 deraadt 1559: (patch included)</a>
1.294 david 1560: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1561: A format string vulnerability exists in talkd(8).
1562: (patch included)</a>
1.294 david 1563: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1564: A format string vulnerability exists in the pw_error() function of the
1565: libutil library, yielding localhost root through chpass(1).
1566: (patch included)</a>
1.294 david 1567: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1568: Bad ESP/AH packets could cause a crash under certain conditions.
1569: (patch included)</a>
1.294 david 1570: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1571: A format string vulnerability (localhost root) exists in xlock(1).
1572: (patch included)</a>
1.294 david 1573: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1574: Various bugs found in X11 libraries have various side effects, almost
1575: completely denial of service in OpenBSD.
1576: (patch included)</a>
1.294 david 1577: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1578: Just like pretty much all the other unix ftp daemons
1579: on the planet, ftpd had a remote root hole in it.
1580: Luckily, ftpd was not enabled by default.
1.137 deraadt 1581: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1582: (patch included)</a>
1.294 david 1583: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1584: Mopd, very rarely used, contained some buffer overflows.
1585: (patch included)</a>
1.294 david 1586: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1587: libedit would check for a <b>.editrc</b> file in the current
1588: directory. Not known to be a real security issue, but a patch
1589: is available anyways.
1590: (patch included)</a>
1.294 david 1591: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1592: A serious bug in dhclient(8) could allow strings from a
1593: malicious dhcp server to be executed in the shell as root.
1594: (patch included)</a>
1.294 david 1595: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1596: A serious bug in isakmpd(8) policy handling wherein
1597: policy verification could be completely bypassed in isakmpd.
1598: (patch included)</a>
1.294 david 1599: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1600: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1601: should not be used, and results in security problems on
1602: other operating systems.</a>
1.294 david 1603: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1604: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1605: (patch included)</a>
1.294 david 1606: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1607: Improper use of ipf <i>keep-state</i> rules can result
1608: in firewall rules being bypassed. (patch included)</a>
1.413 matthieu 1609:
1.124 deraadt 1610: </ul>
1611:
1612: <p>
1613: <li>
1.288 matthieu 1614: <a name="26"></a>
1.119 deraadt 1615:
1.294 david 1616: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.413 matthieu 1617: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1618: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1619: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1620:
1621: <p>
1622: <ul>
1.294 david 1623: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1624: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1625: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1626: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1627: Improper use of ipf <i>keep-state</i> rules can result
1628: in firewall rules being bypassed. (patch included)</a>
1.413 matthieu 1629: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1630: xlockmore has a bug which a localhost attacker can use to gain
1631: access to the encrypted root password hash (which is normally
1.245 miod 1632: encoded using blowfish</a> (see
1.294 david 1633: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1634: crypt(3)</a>)
1.245 miod 1635: (patch included).
1.413 matthieu 1636: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1637: Systems running with procfs enabled and mounted are
1638: vulnerable to a very tricky exploit. procfs is not
1639: mounted by default.
1640: (patch included).</a>
1.294 david 1641: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1642: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1643: thus exposing the system to a race where the aliases file
1644: did not exist.
1.119 deraadt 1645: (patch included).</a>
1.294 david 1646: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1647: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1648: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1649: A buffer overflow in the RSAREF code included in the
1650: USA version of libssl, is possibly exploitable in
1651: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1652: (patch included).<br></a>
1653: <strong>Update:</strong> Turns out that this was not exploitable
1654: in any of the software included in OpenBSD 2.6.
1.413 matthieu 1655: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1656: Any user could change interface media configurations, resulting in
1657: a localhost denial of service attack.
1.121 deraadt 1658: (patch included).</a>
1.119 deraadt 1659: </ul>
1660:
1661: <p>
1662: <li>
1.288 matthieu 1663: <a name="25"></a>
1.106 deraadt 1664:
1.294 david 1665: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.413 matthieu 1666: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1667: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1668: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1669:
1.96 deraadt 1670: <p>
1.104 deraadt 1671: <ul>
1.413 matthieu 1672: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1673: In cron(8), make sure argv[] is NULL terminated in the
1674: fake popen() and run sendmail as the user, not as root.
1675: (patch included).</a>
1.294 david 1676: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1677: filesystems had an overrun in their handling of uio_offset
1678: in their readdir() routines. (These filesystems are not
1679: enabled by default). (patch included).</a>
1.294 david 1680: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1681: when we execve() a new process. (patch included).</a>
1.294 david 1682: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1683: been handled by IPsec may be transmitted as cleartext.
1684: PF_KEY SA expirations may leak kernel resources.
1685: (patch included).</a>
1.294 david 1686: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1687: motd re-writing and change the find(1) to use -execdir
1688: (patch included).</a>
1.294 david 1689: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1690: users to chflags(2) or fchflags(2) on character or block devices
1691: which they may currently be the owner of (patch included).</a>
1.294 david 1692: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1693: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1694: </ul>
1695:
1.106 deraadt 1696: <p>
1697: <li>
1.288 matthieu 1698: <a name="24"></a>
1.235 miod 1699:
1.294 david 1700: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.413 matthieu 1701: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1702: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1703: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1704:
1.96 deraadt 1705: <p>
1.75 deraadt 1706: <ul>
1.294 david 1707: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1708: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1709: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1710: another kernel crash case caused by the <strong>crashme</strong>
1711: program (patch included).</a>
1.294 david 1712: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1713: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1714: (patch included).</a>
1.294 david 1715: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1716: existed in ping(8). (patch included).</a>
1.294 david 1717: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.413 matthieu 1718: the ipq, which could permit an attacker to cause a crash.
1.87 deraadt 1719: (patch included).</a>
1.294 david 1720: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1721: kernel between accept(2) and select(2) could permit an attacker
1722: to hang sockets from remote.
1723: (patch included).</a>
1.294 david 1724: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1725: bog the machine excessively and cause problems.
1726: (patch included).</a>
1.294 david 1727: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1728: DDB interacted to possibly cause a crash.
1729: (patch included).</a>
1.294 david 1730: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1731: (patch included).</a>
1.294 david 1732: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1733: problem in bootpd(8). (patch included).</a>
1.294 david 1734: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1735: exploitable problem relating to environment variables in termcap
1736: and curses. (patch included).</a>
1.294 david 1737: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1738: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1739: </ul>
1740:
1.106 deraadt 1741: <p>
1742: <li>
1.288 matthieu 1743: <a name="23"></a>
1.235 miod 1744:
1.294 david 1745: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.413 matthieu 1746: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1747: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1748: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1749:
1.96 deraadt 1750: <p>
1.53 matthieu 1751: <ul>
1.294 david 1752: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1753: problem in bootpd(8). (patch included).</a>
1.294 david 1754: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1755: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1756: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1757: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1758: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1759: chpass(1) has a file descriptor leak which allows an
1760: attacker to modify /etc/master.passwd.</a>
1.294 david 1761: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1762: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1763: should not be executed with fd slots 0, 1, or 2 free.
1764: (patch included).</a>
1.294 david 1765: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1766: libraries (patches included).</a>
1.294 david 1767: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1768: processes too permissive (4th revision patch included).</a>
1.294 david 1769: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1770: of immutable and append-only file flags. (patch included).</a>
1.294 david 1771: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1772: if IPSEC is enabled (patch included).</a>
1.294 david 1773: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1774: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1775: </ul>
1.9 deraadt 1776:
1.106 deraadt 1777: <p>
1778: <li>
1.288 matthieu 1779: <a name="22"></a>
1.235 miod 1780:
1.294 david 1781: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1782: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1783: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1784: still exist in other operating systems. (The supplied patches are for
1785: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1786:
1.96 deraadt 1787: <p>
1.9 deraadt 1788: <ul>
1.294 david 1789: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1790: packets if IPSEC is enabled (patch included).</a>
1.294 david 1791: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1792: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1793: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1794: (patch included).</a>
1.294 david 1795: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1796: (patch included).</a>
1.294 david 1797: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1798: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1799: (patch included).</a>
1.294 david 1800: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1801: export (patch included).</a>
1.112 philen 1802: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1803: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1804: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1805: Acceptance.</a>
1.294 david 1806: A patch is available <a href="errata22.html#sourceroute">here</a>.
1807: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1808: flaw (patch included).</a>
1.294 david 1809: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1810: </ul>
1811:
1.106 deraadt 1812: <p>
1813: <li>
1.288 matthieu 1814: <a name="21"></a>
1.235 miod 1815:
1.294 david 1816: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1817: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1818: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1819: exist in other operating systems. (If you are running OpenBSD 2.1, we
1820: would strongly recommend an upgrade to the newest release, as this
1821: patch list only attempts at fixing the most important security
1822: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1823: security problems. Many of those problems were solved in ways which
1824: make it hard for us to provide patches).
1825:
1.96 deraadt 1826: <p>
1.52 deraadt 1827: <ul>
1.112 philen 1828: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1829: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1830: (patch included)</a>
1.112 philen 1831: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1832: </ul>
1.51 deraadt 1833:
1.106 deraadt 1834: <p>
1835: <li>
1.288 matthieu 1836: <a name="20"></a>
1.235 miod 1837:
1.294 david 1838: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1839: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1840: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1841: exist in other operating systems. (If you are running OpenBSD 2.0, we
1842: commend you for being there back in the old days!, but you're really
1843: missing out if you don't install a new version!)
1844:
1845: <p>
1846: <ul>
1.112 philen 1847: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.413 matthieu 1848: resolver (patch included)</a>
1.99 deraadt 1849: <li>Many others... if people can hunt them down, please let me know
1850: and we'll put them up here.
1851: </ul>
1.51 deraadt 1852: <p>
1.106 deraadt 1853:
1.288 matthieu 1854: <a name="watching"></a>
1.294 david 1855: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1856:
1.21 deraadt 1857: Since we take a proactive stance with security, we are continually
1858: finding and fixing new security problems. Not all of these problems
1.80 espie 1859: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1860: confirmed to be exploitable; many simple bugs we fix do turn out to
1861: have security consequences we could not predict. We do not have the
1862: time resources to make these changes available in the above format.<p>
1.21 deraadt 1863:
1864: Thus there are usually minor security fixes in the current source code
1865: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1866: guarantee that these problems are of minimal impact and unproven
1.44 ian 1867: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1868: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1869:
1.45 deraadt 1870: People who are really concerned with security can do a number of
1871: things:<p>
1.21 deraadt 1872:
1873: <ul>
1874: <li>If you understand security issues, watch our
1.294 david 1875: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1876: eye out for things which appear security related. Since
1.21 deraadt 1877: exploitability is not proven for many of the fixes we make,
1878: do not expect the relevant commit message to say "SECURITY FIX!".
1879: If a problem is proven and serious, a patch will be available
1880: here very shortly after.
1.161 horacio 1881: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1882: security-announce mailing list</a> which will notify you for every
1.186 ian 1883: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1884: and instruct you on how to patch the problem.
1.21 deraadt 1885: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1886: complete system build from time to time (read /usr/src/Makefile
1887: carefully). Users can make the assumption that the current
1888: source tree always has stronger security than the previous release.
1.45 deraadt 1889: However, building your own system from source code is not trivial;
1.397 deraadt 1890: it is nearly 850MB of source code, and problems do occur as we
1.45 deraadt 1891: transition between major releases.
1.115 ericj 1892: <li>Install a binary snapshot for your
1.80 espie 1893: architecture, which are made available fairly often. For
1.413 matthieu 1894: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1895: </ul>
1896:
1.9 deraadt 1897: <p>
1.288 matthieu 1898: <a name="reporting"></a>
1.294 david 1899: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1900:
1.5 deraadt 1901: <p> If you find a new security problem, you can mail it to
1.294 david 1902: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1903: <br>
1.5 deraadt 1904: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1905: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1906:
1.107 deraadt 1907: <p>
1.288 matthieu 1908: <a name="papers"></a>
1.294 david 1909: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1910:
1.389 lum 1911: Numerous
1.404 deraadt 1912: <a href="papers/index.html">papers</a> have been written by OpenBSD team members,
1.389 lum 1913: many dedicated to security.
1.294 david 1914: </ul>
1.1 deraadt 1915:
1.24 deraadt 1916: </body>
1917: </html>
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