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