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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.387 miod 57: <a href="#34">3.4</a>,
1.388 miod 58: <a href="#35">3.5</a>,
1.365 deraadt 59: <br>
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 deraadt 67: <a href="#43">4.3</a>,
1.377 tobias 68: <a href="#44">4.4</a>,
1.378 jasper 69: <a href="#45">4.5</a>,
1.385 jasper 70: <a href="#46">4.6</a>,
1.387 miod 71: <a href="#47">4.7</a>,
72: <a href="#48">4.8</a>,
1.390 sthen 73: <a href="#49">4.9</a>,
74: <a href="#50">5.0</a>,
1.394 lum 75: <a href="#51">5.1</a>,
76: <br>
1.395 sthen 77: <a href="#52">5.2</a>,
1.398 sthen 78: <a href="#53">5.3</a>,
79: <a href="#54">5.4</a>.
1.114 philen 80: </td>
81: </tr>
82: </table>
1.56 deraadt 83: <hr>
84:
1.294 david 85: <a name="goals"></a>
1.278 deraadt 86: <ul>
1.294 david 87: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 88:
1.14 deraadt 89: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 90: ONE in the industry for security (if we are not already there). Our
91: open software development model permits us to take a more
92: uncompromising view towards increased security than Sun, SGI, IBM, HP,
93: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 94: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 95: cryptography</a>, we are able to take cryptographic approaches towards
96: fixing security problems.<p>
1.18 deraadt 97:
1.288 matthieu 98: <a name="disclosure"></a>
1.294 david 99: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 100:
1.45 deraadt 101: Like many readers of the
1.196 jufi 102: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 103: BUGTRAQ mailing list</a>,
1.106 deraadt 104: we believe in full disclosure of security problems. In the
105: operating system arena, we were probably the first to embrace
106: the concept. Many vendors, even of free software, still try
107: to hide issues from their users.<p>
108:
109: Security information moves very fast in cracker circles. On the other
110: hand, our experience is that coding and releasing of proper security
111: fixes typically requires about an hour of work -- very fast fix
112: turnaround is possible. Thus we think that full disclosure helps the
113: people who really care about security.<p>
114:
1.288 matthieu 115: <a name="process"></a>
1.294 david 116: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 117:
1.12 deraadt 118: Our security auditing team typically has between six and twelve
1.45 deraadt 119: members who continue to search for and fix new security holes. We
120: have been auditing since the summer of 1996. The process we follow to
121: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 122: every critical software component. We are not so much looking for
123: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 124: years later someone discovers the problem used to be a security
1.106 deraadt 125: issue, and we fixed it because it was just a bug, well, all the
126: better. Flaws have been found in just about every area of the system.
127: Entire new classes of security problems have been found during our
128: audit, and often source code which had been audited earlier needs
129: re-auditing with these new flaws in mind. Code often gets audited
130: multiple times, and by multiple people with different auditing
131: skills.<p>
1.12 deraadt 132:
1.94 deraadt 133: Some members of our security auditing team worked for Secure Networks,
134: the company that made the industry's premier network security scanning
135: software package Ballista (Secure Networks got purchased by Network
136: Associates, Ballista got renamed to Cybercop Scanner, and well...)
137: That company did a lot of security research, and thus fit in well
1.106 deraadt 138: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
139: colours since day 1.<p>
1.31 deraadt 140:
1.34 deraadt 141: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 142: In most cases we have found that the determination of exploitability
143: is not an issue. During our ongoing auditing process we find many
144: bugs, and endeavor to fix them even though exploitability is not
145: proven. We fix the bug, and we move on to find other bugs to fix. We
146: have fixed many simple and obvious careless programming errors in code
147: and only months later discovered that the problems were in fact
148: exploitable. (Or, more likely someone on
1.197 jufi 149: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 150: would report that other operating systems were vulnerable to a `newly
151: discovered problem', and then it would be discovered that OpenBSD had
152: been fixed in a previous release). In other cases we have been saved
153: from full exploitability of complex step-by-step attacks because we
154: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 155: managed such a success is the lpd advisory that Secure Networks put out.
156: <p>
1.29 deraadt 157:
1.288 matthieu 158: <a name="newtech"></a>
1.294 david 159: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 160:
161: As we audit source code, we often invent new ways of solving problems.
162: Sometimes these ideas have been used before in some random application
163: written somewhere, but perhaps not taken to the degree that we do.
164: <p>
165:
166: <ul>
167: <li>strlcpy() and strlcat()
168: <li>Memory protection purify
169: <ul>
170: <li>W^X
171: <li>.rodata segment
172: <li>Guard pages
173: <li>Randomized malloc()
174: <li>Randomized mmap()
175: <li>atexit() and stdio protection
176: </ul>
1.295 otto 177: <li>Privilege separation
1.278 deraadt 178: <li>Privilege revocation
179: <li>Chroot jailing
180: <li>New uids
181: <li>ProPolice
182: <li>... and others
183: </ul>
184: <p>
185:
1.294 david 186: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 187:
1.45 deraadt 188: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 189: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 190: commonplace in security forums like
1.197 jufi 191: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 192:
1.45 deraadt 193: The most intense part of our security auditing happened immediately
1.80 espie 194: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 195: over the last third of 1996 and first half of 1997. Thousands (yes,
196: thousands) of security issues were fixed rapidly over this year-long
197: period; bugs like the standard buffer overflows, protocol
198: implementation weaknesses, information gathering, and filesystem
199: races. Hence most of the security problems that we encountered were
200: fixed before our 2.1 release, and then a far smaller number needed
201: fixing for our 2.2 release. We do not find as many problems anymore,
202: it is simply a case of diminishing returns. Recently the security
203: problems we find and fix tend to be significantly more obscure or
204: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 205:
1.35 deraadt 206: <ul>
1.45 deraadt 207: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 208: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 209: to search for more complicated exploits, so we will too.
210: <li>Finding and fixing subtle flaws in complicated software is
211: a lot of fun.
1.35 deraadt 212: </ul>
1.106 deraadt 213: <p>
1.15 deraadt 214:
1.14 deraadt 215: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 216: to find and fix new security flaws.<p>
1.12 deraadt 217:
1.288 matthieu 218: <a name="default"></a>
1.294 david 219: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 220:
221: To ensure that novice users of OpenBSD do not need to become security
222: experts overnight (a viewpoint which other vendors seem to have), we
223: ship the operating system in a Secure by Default mode. All non-essential
224: services are disabled. As the user/administrator becomes more familiar
225: with the system, he will discover that he has to enable daemons and other
226: parts of the system. During the process of learning how to enable a new
227: service, the novice is more likely to learn of security considerations.<p>
228:
229: This is in stark contrast to the increasing number of systems that
230: ship with NFS, mountd, web servers, and various other services enabled
231: by default, creating instantaneous security problems for their users
232: within minutes after their first install.<p>
233:
1.288 matthieu 234: <a name="crypto"></a>
1.294 david 235: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 236:
237: And of course, since the OpenBSD project is based in Canada, it is possible
238: for us to integrate cryptography. For more information, read the page
1.116 deraadt 239: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 240:
1.294 david 241: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 242:
243: <li>
1.398 sthen 244: <a name="54"></a>
245:
246: <h3><font color="#e00000">OpenBSD 5.4 Security Advisories</font></h3>
247: These are the OpenBSD 5.4 advisories -- all these problems are solved
248: in <a href=anoncvs.html>OpenBSD current</a> and the
249: <a href=stable.html>patch branch</a>.
250:
251: <p>
252: <ul>
253: <li><a href="errata54.html#002_sshgcm">November 7, 2013:
254: Memory corruption in post-authentication sshd process if AES-GCM cipher
255: is selected</a>
256: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
257: <li><a href="errata54.html#004_nginx">November 21, 2013:
258: Security restriction bypass in certain nginx(8) configurations</a>
259: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
260: <br>
1.400 matthieu 261: <li><a href="errata54.html#006_libXfont">January 10, 2013:
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>).
1.398 sthen 264: </ul>
265:
266: <li>
1.395 sthen 267: <a name="53"></a>
268:
269: <h3><font color="#e00000">OpenBSD 5.3 Security Advisories</font></h3>
270: These are the OpenBSD 5.3 advisories -- all these problems are solved
271: in <a href=anoncvs.html>OpenBSD current</a> and the
272: <a href=stable.html>patch branch</a>.
273:
274: <p>
275: <ul>
1.398 sthen 276: <li><a href="errata53.html#009_sshgcm">November 7, 2013:
277: Memory corruption in post-authentication sshd process if AES-GCM cipher
278: is selected</a>
279: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
280: <li><a href="errata53.html#011_nginx">November 21, 2013:
281: Security restriction bypass in certain nginx(8) configurations</a>
282: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
1.402 ! matthieu 283: <li><a href="errata53.html#013_libXfont">January 10, 2013:
! 284: Buffer overflow in parsing of BDF font files</a>
! 285: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6462">CVE-2013-6462</a>).
1.395 sthen 286: </ul>
287:
1.399 deraadt 288: <br><p><b>
289: OpenBSD 5.2 and earlier releases are not supported anymore. The following
290: paragraphs only list advisories issued while they were maintained; these
291: releases are likely to be affected by the advisories for more recent releases.
292: </b><p>
293:
1.395 sthen 294: <li>
1.393 sthen 295: <a name="52"></a>
296:
297: <h3><font color="#e00000">OpenBSD 5.2 Security Advisories</font></h3>
298: These are the OpenBSD 5.2 advisories -- all these problems are solved
299: in <a href=anoncvs.html>OpenBSD current</a> and the
300: <a href=stable.html>patch branch</a>.
301:
302: <p>
303: <ul>
304: None yet!
305: </ul>
306:
307: <li>
1.390 sthen 308: <a name="51"></a>
309:
310: <h3><font color="#e00000">OpenBSD 5.1 Security Advisories</font></h3>
311: These are the OpenBSD 5.1 advisories -- all these problems are solved
312: in <a href=anoncvs.html>OpenBSD current</a> and the
313: <a href=stable.html>patch branch</a>.
314:
315: <p>
316: <ul>
1.393 sthen 317: <li><a href="errata51.html#001_libcrypto">April 23, 2012:
318: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 319: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.390 sthen 320: </ul>
321:
322: <li>
1.388 miod 323: <a name="50"></a>
324:
325: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
326: These are the OpenBSD 5.0 advisories -- all these problems are solved
327: in <a href=anoncvs.html>OpenBSD current</a> and the
328: <a href=stable.html>patch branch</a>.
329:
330: <p>
331: <ul>
1.393 sthen 332: <li><a href="errata50.html#002_libcrypto">April 23, 2012:
333: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 334: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.388 miod 335: </ul>
336:
337: <li>
1.387 miod 338: <a name="49"></a>
339:
340: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
341: These are the OpenBSD 4.9 advisories -- all these problems are solved
342: in <a href=anoncvs.html>OpenBSD current</a> and the
343: <a href=stable.html>patch branch</a>.
344:
345: <p>
346: <ul>
347: None yet!
348: </ul>
349:
350: <li>
351: <a name="48"></a>
352:
353: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
354: These are the OpenBSD 4.8 advisories -- all these problems are solved
355: in <a href=anoncvs.html>OpenBSD current</a> and the
356: <a href=stable.html>patch branch</a>.
357:
358: <p>
359: <ul>
360: <li><a href="errata48.html#009_pf">February 16, 2011:
361: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
362: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
363: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
364: prefixes "10.1.1.1/30") are not affected.</a>
365: <li><a href="errata48.html#008_openssl">February 11, 2011:
366: An incorrectly formatted ClientHello handshake message could cause
367: OpenSSL to parse past the end of the message. An attacker could use
368: this flaw to trigger an invalid memory access, causing a crash of an
369: application linked to OpenSSL. As well, certain applications may expose
370: the contents of parsed OCSP extensions, specifically the OCSP nonce
371: extension.
372: <br>
373: Applications are only affected if they act as a server and call
374: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
375: that nothing in the base OS uses this. Apache httpd started using this
376: in v2.3.3; this is newer than the version in ports.</a>
377: <li><a href="errata48.html#005_pf">December 17, 2010:
378: Insufficent initialization of the pf rule structure in the ioctl
379: handler may allow userland to modify kernel memory. By default root
380: privileges are needed to add or modify pf rules.</a>
381: </ul>
382:
383: <li>
1.385 jasper 384: <a name="47"></a>
385:
386: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
387: These are the OpenBSD 4.7 advisories -- all these problems are solved
388: in <a href=anoncvs.html>OpenBSD current</a> and the
389: <a href=stable.html>patch branch</a>.
390:
391: <p>
392: <ul>
1.387 miod 393: <li><a href="errata47.html#013_pf">February 16, 2011:
394: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
395: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
396: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
397: prefixes "10.1.1.1/30") are not affected.</a>
398: <li><a href="errata47.html#012_openssl">February 11, 2011:
399: An incorrectly formatted ClientHello handshake message could cause
400: OpenSSL to parse past the end of the message. An attacker could use
401: this flaw to trigger an invalid memory access, causing a crash of an
402: application linked to OpenSSL. As well, certain applications may expose
403: the contents of parsed OCSP extensions, specifically the OCSP nonce
404: extension.
405: <br>
406: Applications are only affected if they act as a server and call
407: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
408: that nothing in the base OS uses this. Apache httpd started using this
409: in v2.3.3; this is newer than the version in ports.</a>
410: <li><a href="errata47.html#009_pf">December 17, 2010:
411: Insufficent initialization of the pf rule structure in the ioctl
412: handler may allow userland to modify kernel memory. By default root
413: privileges are needed to add or modify pf rules.</a>
414: <li><a href="errata47.html#004_pfsync">April 23, 2010:
415: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 416: <li><a href="errata47.html#003_openssl">April 14, 2010:
417: In TLS connections, certain incorrectly formatted records can
418: cause an OpenSSL client or server to crash due to a read
1.392 tobias 419: attempt at NULL.</a>
1.385 jasper 420: </ul>
421:
422: <li>
1.378 jasper 423: <a name="46"></a>
424:
425: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
426: These are the OpenBSD 4.6 advisories -- all these problems are solved
427: in <a href=anoncvs.html>OpenBSD current</a> and the
428: <a href=stable.html>patch branch</a>.
429:
430: <p>
431: <ul>
1.385 jasper 432: <li><a href="errata46.html#010_openssl">April 14, 2010:
433: In TLS connections, certain incorrectly formatted records can
434: cause an OpenSSL client or server to crash due to a read
1.392 tobias 435: attempt at NULL.</a>
1.384 jasper 436: <li><a href="errata46.html#006_openssl">March 12, 2010:
437: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 438: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 439: <li><a href="errata46.html#004_openssl">November 26, 2009:
440: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 441: related to renegotiation.</a>
1.378 jasper 442: </ul>
1.382 tobias 443:
444: <li>
1.373 djm 445: <a name="45"></a>
446:
447: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
448: These are the OpenBSD 4.5 advisories -- all these problems are solved
449: in <a href=anoncvs.html>OpenBSD current</a> and the
450: <a href=stable.html>patch branch</a>.
451:
452: <p>
453: <ul>
1.385 jasper 454: <li><a href="errata45.html#016_openssl">April 14, 2010:
455: In TLS connections, certain incorrectly formatted records can
456: cause an OpenSSL client or server to crash due to a read
1.392 tobias 457: attempt at NULL.</a>
1.385 jasper 458: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 459: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 460: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 461: <li><a href="errata45.html#010_openssl">November 26, 2009:
462: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 463: related to renegotiation.</a>
1.373 djm 464: </ul>
465:
466: <li>
1.365 deraadt 467: <a name="44"></a>
468:
469: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
470: These are the OpenBSD 4.4 advisories -- all these problems are solved
471: in <a href=anoncvs.html>OpenBSD current</a> and the
472: <a href=stable.html>patch branch</a>.
473:
474: <p>
475: <ul>
1.372 millert 476: <li><a href="errata44.html#011_sudo">February 22, 2009:
477: sudo(8) may allow a user listed in sudoers to run a command
478: as a different user than their access rule specifies when a Unix
479: group is used in the RunAs portion of the rule.</a>
1.370 djm 480: <li><a href="errata44.html#008_bind">January 15, 2009:
481: named(8) suffered from a similar logic error that may allow
482: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 483: <li><a href="errata44.html#007_openssl">January 9, 2009:
484: OpenSSL suffered from some logic errors that allowed bypass
485: of DSA/ECDSA certificate validation.</a>
1.367 brad 486: <li><a href="errata44.html#001_ndp">November 2, 2008:
487: The Neighbor Discovery Protocol (ndp) did not correctly verify
488: neighbor solicitation requests maybe allowing a nearby attacker
489: to intercept traffic.</a>
1.365 deraadt 490: </ul>
491:
492: <li>
1.357 brad 493: <a name="43"></a>
494:
495: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
496: These are the OpenBSD 4.3 advisories -- all these problems are solved
497: in <a href=anoncvs.html>OpenBSD current</a> and the
498: <a href=stable.html>patch branch</a>.
499:
500: <p>
501: <ul>
1.372 millert 502: <li><a href="errata43.html#011_sudo">February 22, 2009:
503: sudo(8) may allow a user listed in sudoers to run a command
504: as a different user than their access rule specifies when a Unix
505: group is used in the RunAs portion of the rule.</a>
1.370 djm 506: <li><a href="errata43.html#008_bind">January 15, 2009:
507: named(8) suffered from a similar logic error that may allow
508: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 509: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 510: OpenSSL suffered from some logic errors that allowed bypass
511: of DSA/ECDSA certificate validation.</a>
1.382 tobias 512: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 513: The Neighbor Discovery Protocol (ndp) did not correctly verify
514: neighbor solicitation requests maybe allowing a nearby attacker
515: to intercept traffic.</a>
1.362 brad 516: <li><a href="errata43.html#004_bind">July 23, 2008:
517: A vulnerability has been found with BIND.</a>
1.361 brad 518: <li><a href="errata43.html#003_xorg">July 15, 2008:
519: Multiple vulnerabilities in X.Org.</a>
1.359 brad 520: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 521: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 522: <li><a href="errata43.html#001_openssh">March 30, 2008:
523: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 524: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 525: </ul>
526:
527: <li>
1.348 merdely 528: <a name="42"></a>
529: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
530: These are the OpenBSD 4.2 advisories -- all these problems are solved
531: in <a href=anoncvs.html>OpenBSD current</a> and the
532: <a href=stable.html>patch branch</a>.
533:
534: <p>
535: <ul>
1.364 tobias 536: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 537: The Neighbor Discovery Protocol (ndp) did not correctly verify
538: neighbor solicitation requests maybe allowing a nearby attacker
539: to intercept traffic.</a>
1.362 brad 540: <li><a href="errata42.html#013_bind">July 23, 2008:
541: A vulnerability has been found with BIND.</a>
1.361 brad 542: <li><a href="errata42.html#012_xorg2">July 15, 2008:
543: Multiple vulnerabilities in X.Org.</a>
1.359 brad 544: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 545: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 546: <li><a href="errata42.html#010_openssh">March 30, 2008:
547: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 548: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 549: <li><a href="errata42.html#009_ppp">March 7, 2008:
550: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 551: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
552: Multiple vulnerabilities in X.Org.</a>
1.351 okan 553: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
554: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 555: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 556: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 557: </ul>
558:
559: <li>
1.346 matthieu 560: <a name="41"></a>
561:
562: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
563: These are the OpenBSD 4.1 advisories -- all these problems are solved
564: in <a href=anoncvs.html>OpenBSD current</a> and the
565: <a href=stable.html>patch branch</a>.
566:
567: <p>
568: <ul>
1.359 brad 569: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 570: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 571: <li><a href="errata41.html#015_openssh">March 30, 2008:
572: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 573: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 574: <li><a href="errata41.html#014_ppp">March 7, 2008:
575: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 576: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
577: Multiple vulnerabilities in X.Org.</a>
578: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
579: The SSL_get_shared_ciphers() function in OpenSSL contains
580: an off-by-one overflow.</a>
1.350 deraadt 581: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 582: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 583: <li><a href="errata41.html#009_file">Jul 9, 2007:
584: Fix possible heap overflow in file(1).</a>
1.346 matthieu 585: <li><a href="errata41.html#005_route6">Apr 27, 2007:
586: IPv6 type 0 route headers can be used to mount a DoS attack
587: against hosts and networks.</a>
588: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
589: Multiple vulnerabilities in X.Org.</a>
590: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
591: Incorrect mbuf handling for ICMP6 packets.</a>
592: </ul>
593:
594: <li>
1.334 brad 595: <a name="40"></a>
596: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
597: These are the OpenBSD 4.0 advisories -- all these problems are solved
598: in <a href=anoncvs.html>OpenBSD current</a> and the
599: <a href=stable.html>patch branch</a>.
600:
601: <p>
602: <ul>
1.382 tobias 603: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
604: The SSL_get_shared_ciphers() function in OpenSSL contains an
605: off-by-one overflow.</a>
1.350 deraadt 606: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 607: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 608: <li><a href="errata40.html#015_file">Jul 9, 2007:
609: Fix possible heap overflow in file(1).</a>
1.343 deraadt 610: <li><a href="errata40.html#012_route6">Apr 23, 2007:
611: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 612: against hosts and networks.</a>
1.342 mbalmer 613: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
614: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 615: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
616: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 617: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 618: Insufficient validation in vga(4) may allow an attacker to gain
619: root privileges on some i386 systems.</a>
1.339 deraadt 620: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 621: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 622: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 623: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
624: found by Chris Evans.</a>
1.339 deraadt 625: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 626: Several problems have been found in OpenSSL.</a>
1.339 deraadt 627: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 628: httpd(8) does not sanitize the Expect header from an HTTP request
629: when it is reflected back in an error message, which might allow
630: cross-site scripting (XSS) style attacks.</a>
631: </ul>
632:
633: <li>
1.321 brad 634: <a name="39"></a>
635:
636: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
637: These are the OpenBSD 3.9 advisories -- all these problems are solved
638: in <a href=anoncvs.html>OpenBSD current</a> and the
639: <a href=stable.html>patch branch</a>.
640:
641: <p>
642: <ul>
1.343 deraadt 643: <li><a href="errata39.html#022_route6">Apr 23, 2007:
644: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 645: against hosts and networks.</a>
1.342 mbalmer 646: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
647: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 648: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
649: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 650: <li><a href="errata39.html#agp">Jan 3, 2007:
651: Insufficient validation in vga(4) may allow an attacker to gain
652: root privileges on some i386 systems.</a>
1.336 brad 653: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 654: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 655: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 656: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 657: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 658: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 659: found by Chris Evans.</a>
1.333 deraadt 660: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 661: Several problems have been found in OpenSSL.</a>
1.333 deraadt 662: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 663: httpd(8) does not sanitize the Expect header from an HTTP request
664: when it is reflected back in an error message, which might allow
665: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 666: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 667: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
668: possible for an attacker to construct an invalid signature which
669: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 670: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 671: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 672: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 673: Due to the failure to correctly validate LCP configuration option
674: lengths, it is possible for an attacker to send LCP packets via an
675: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 676: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 677: A problem in isakmpd(8) caused IPsec to run partly without replay
678: protection.</a>
1.333 deraadt 679: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 680: It is possible to cause the kernel to panic when more than the default
681: number of sempahores have been allocated.</a>
1.333 deraadt 682: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 683: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
684: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
685: option.</a>
1.333 deraadt 686: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 687: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 688: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 689: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
690: overflow.</a>
1.333 deraadt 691: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 692: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 693: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 694: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 695: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 696: A race condition has been reported to exist in the handling by sendmail
697: of asynchronous signals.</a>
698: </ul>
699:
700: <li>
1.318 deraadt 701: <a name="38"></a>
702:
703: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
704: These are the OpenBSD 3.8 advisories -- all these problems are solved
705: in <a href=anoncvs.html>OpenBSD current</a> and the
706: <a href=stable.html>patch branch</a>.
707:
708: <p>
709: <ul>
1.332 brad 710: <li><a href="errata38.html#ssh2">Oct 12, 2006:
711: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 712: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 713: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 714: found by Chris Evans.</a>
715: <li><a href="errata38.html#openssl2">Oct 7, 2006:
716: Several problems have been found in OpenSSL.</a>
717: <li><a href="errata38.html#httpd2">Oct 7, 2006:
718: httpd(8) does not sanitize the Expect header from an HTTP request
719: when it is reflected back in an error message, which might allow
720: cross-site scripting (XSS) style attacks.</a>
1.329 brad 721: <li><a href="errata38.html#openssl">Sep 8, 2006:
722: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
723: possible for an attacker to construct an invalid signature which
724: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 725: <li><a href="errata38.html#bind">Sep 8, 2006:
726: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 727: <li><a href="errata38.html#sppp">Sep 2, 2006:
728: Due to the failure to correctly validate LCP configuration option
729: lengths, it is possible for an attacker to send LCP packets via an
730: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 731: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
732: A problem in isakmpd(8) caused IPsec to run partly without replay
733: protection.</a>
734: <li><a href="errata38.html#sem">Aug 25, 2006:
735: It is possible to cause the kernel to panic when more than the default
736: number of sempahores have been allocated.</a>
737: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
738: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
739: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
740: option.</a>
741: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
742: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 743: <li><a href="errata38.html#httpd">Jul 30, 2006:
744: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
745: overflow.</a>
1.324 brad 746: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
747: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 748: <li><a href="errata38.html#xorg">May 2, 2006:
749: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 750: <li><a href="errata38.html#sendmail">Mar 25, 2006:
751: A race condition has been reported to exist in the handling by sendmail
752: of asynchronous signals.</a>
753: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 754: Josh Bressers has reported a weakness in OpenSSH caused due to the
755: insecure use of the system(3) function in scp(1) when performing copy
756: operations using filenames that are supplied by the user from the
757: command line.</a>
1.321 brad 758: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 759: Do not allow users to trick suid programs into re-opening files via
760: /dev/fd.</a>
1.321 brad 761: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 762: A buffer overflow has been found in the Perl interpreter with the
763: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 764: </ul>
765:
766: <li>
1.312 david 767: <a name="37"></a>
768:
769: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
770: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 771: in <a href="anoncvs.html">OpenBSD current</a>. The
772: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
773: you should update your machine.
1.312 david 774:
775: <p>
776: <ul>
1.322 brad 777: <li><a href="errata37.html#xorg">May 2, 2006:
778: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 779: <li><a href="errata37.html#sendmail">Mar 25, 2006:
780: A race condition has been reported to exist in the handling by sendmail
781: of asynchronous signals.</a>
1.320 brad 782: <li><a href="errata37.html#ssh">Feb 12, 2006:
783: Josh Bressers has reported a weakness in OpenSSH caused due to the
784: insecure use of the system(3) function in scp(1) when performing copy
785: operations using filenames that are supplied by the user from the
786: command line.</a>
1.319 brad 787: <li><a href="errata37.html#fd">Jan 5, 2006:
788: Do not allow users to trick suid programs into re-opening files via
789: /dev/fd.</a>
790: <li><a href="errata37.html#perl">Jan 5, 2006:
791: A buffer overflow has been found in the Perl interpreter with the
792: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 793: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 794: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 795: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 796: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 797: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 798: Fix a race condition in sudo(8) that could allow a user
1.315 millert 799: to run arbitrary commands.</a>
1.318 deraadt 800: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 801: Fix a buffer overflow, memory leaks, and NULL pointer
802: dereference in cvs(1).</a>
1.312 david 803: </ul>
804:
805: <li>
1.301 miod 806: <a name="36"></a>
807:
808: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
809: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 810: in <a href="anoncvs.html">OpenBSD current</a>. The
811: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
812: you should update your machine.
1.301 miod 813:
814: <p>
1.302 markus 815: <ul>
1.317 millert 816: <li><a href="errata36.html#libz2">Jul 21, 2005:
817: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 818: <li><a href="errata36.html#libz">Jul 6, 2005:
819: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 820: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 821: Fix a race condition in sudo(8) that could allow a user
1.315 millert 822: to run arbitrary commands.</a>
1.311 deraadt 823: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 824: Fix a buffer overflow, memory leaks, and NULL pointer
825: dereference in cvs(1).</a>
1.311 deraadt 826: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 827: Due to buffer overflows in telnet(1), a malicious
828: server or man-in-the-middle attack could allow
829: execution of arbitrary code with the privileges of
830: the user invoking telnet(1).</a>
1.311 deraadt 831: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 832: More stringent checking should be done in the copy(9)
833: functions to prevent their misuse.</a>
1.311 deraadt 834: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 835: More stringent checking should be done in the copy(9)
836: functions to prevent their misuse.</a>
1.311 deraadt 837: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 838: httpd(8)'s mod_include module fails to properly validate
839: the length of user supplied tag strings prior to copying
1.305 brad 840: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 841: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 842: On systems running isakmpd(8) it is possible for a local
843: user to cause kernel memory corruption and system panic by
1.303 markus 844: setting ipsec(4) credentials on a socket.</a>
1.302 markus 845: </ul>
1.301 miod 846:
847: <li>
1.288 matthieu 848: <a name="35"></a>
1.279 deraadt 849:
1.294 david 850: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 851: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 852: in <a href="anoncvs.html">OpenBSD current</a>. The
853: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
854: you should update your machine.
1.279 deraadt 855:
856: <p>
857: <ul>
1.310 brad 858: <li><a href="errata35.html#cvs4">Apr 28, 2005:
859: Fix a buffer overflow, memory leaks, and NULL pointer
860: dereference in cvs(1).</a>
1.309 brad 861: <li><a href="errata35.html#telnet">Mar 30, 2005:
862: Due to buffer overflows in telnet(1), a malicious
863: server or man-in-the-middle attack could allow
864: execution of arbitrary code with the privileges of
865: the user invoking telnet(1).</a>
1.308 brad 866: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 867: More stringent checking should be done in the copy(9)
868: functions to prevent their misuse.</a>
1.306 brad 869: <li><a href="errata35.html#locore">Feb 28, 2005:
870: More stringent checking should be done in the copy(9)
871: functions to prevent their misuse.</a>
1.304 brad 872: <li><a href="errata35.html#httpd3">Jan 12, 2005:
873: httpd(8)'s mod_include module fails to properly validate
874: the length of user supplied tag strings prior to copying
1.305 brad 875: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 876: <li><a href="errata35.html#pfkey">Dec 14, 2004:
877: On systems running isakmpd(8) it is possible for a local
878: user to cause kernel memory corruption and system panic by
1.303 markus 879: setting ipsec(4) credentials on a socket.</a>
1.301 miod 880: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 881: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 882: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 883: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 884: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 885: httpd(8)'s mod_rewrite module can be made to write one zero byte in
886: an arbitrary memory position outside of a char array, causing a DoS
887: or possibly buffer overflows.</a>
1.301 miod 888: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 889: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 890: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 891: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 892: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 893: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 894: Multiple remote vulnerabilities have been found in the cvs(1)
895: server which can be used by CVS clients to crash or execute
1.293 brad 896: arbitrary code on the server.</a>
1.301 miod 897: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 898: kdc(8) performs inadequate checking of request fields, leading
899: to the possibility of principal impersonation from other
900: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 901: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 902: xdm(1) ignores the requestPort resource and creates a
1.293 brad 903: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 904: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 905: A buffer overflow in the cvs(1) server has been found,
906: which can be used by CVS clients to execute arbitrary code on
1.293 brad 907: the server.</a>
1.301 miod 908: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 909: Integer overflow problems were found in procfs, allowing
1.293 brad 910: reading of arbitrary kernel memory.</a>
1.301 miod 911: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 912: Pathname validation problems have been found in cvs(1),
913: allowing clients and servers access to files outside the
1.293 brad 914: repository or local CVS tree.</a>
1.279 deraadt 915: </ul>
916:
917: <p>
918: <li>
1.288 matthieu 919: <a name="34"></a>
1.261 david 920:
1.294 david 921: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 922: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 923: in <a href="anoncvs.html">OpenBSD current</a>. The
924: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
925: you should update your machine.
1.261 david 926: <p>
927: <ul>
1.302 markus 928: <li><a href="errata34.html#pfkey">Dec 14, 2004:
929: On systems running isakmpd(8) it is possible for a local
930: user to cause kernel memory corruption and system panic by
1.303 markus 931: setting ipsec(4) credentials on a socket.</a>
1.298 brad 932: <li><a href="errata34.html#xpm">Sep 16, 2004:
933: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 934: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
935: httpd(8)'s mod_rewrite module can be made to write one zero byte in
936: an arbitrary memory position outside of a char array, causing a DoS
937: or possibly buffer overflows.</a>
1.294 david 938: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 939: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 940: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 941: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 942: an attacker can delete IPsec tunnels at will.</a>
1.294 david 943: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 944: Multiple remote vulnerabilities have been found in the cvs(1)
945: server which can be used by CVS clients to crash or execute
1.293 brad 946: arbitrary code on the server.</a>
1.294 david 947: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 948: kdc(8) performs inadequate checking of request fields, leading
949: to the possibility of principal impersonation from other
950: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 951: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 952: A buffer overflow in the cvs(1) server has been found,
953: which can be used by CVS clients to execute arbitrary code on
954: the server.</a>
1.294 david 955: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 956: Integer overflow problems were found in procfs, allowing
957: reading of arbitrary kernel memory.</a>
1.294 david 958: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 959: Pathname validation problems have been found in cvs(1),
960: allowing clients and servers access to files outside the
961: repository or local CVS tree.</a>
1.294 david 962: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 963: A missing check for a NULL-pointer dereference may allow a
1.281 otto 964: remote attacker to crash applications using OpenSSL.</a>
1.294 david 965: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 966: Defects in the payload validation and processing functions of
967: isakmpd have been discovered. An attacker could send malformed
968: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 969: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 970: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
971: access module, using IP addresses without a netmask on big endian
972: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 973: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 974: An IPv6 MTU handling problem exists that could be used by an
975: attacker to cause a denial of service attack.</a>
1.294 david 976: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 977: A reference counting bug in shmat(2) could be used to write to
978: kernel memory under certain circumstances.</a>
1.294 david 979: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 980: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 981: by Thomas Walpuski.</a>
1.294 david 982: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 983: It may be possible for a local user to overrun the stack in
984: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 985: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 986: The use of certain ASN.1 encodings or malformed public keys may
987: allow an attacker to mount a denial of service attack against
988: applications linked with ssl(3).</a>
1.261 david 989: </ul>
990:
991: <li>
1.288 matthieu 992: <a name="33"></a>
1.246 deraadt 993:
1.294 david 994: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 995: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 996: in <a href="anoncvs.html">OpenBSD current</a>. The
997: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 998: you should update your machine.
1.246 deraadt 999: <p>
1000: <ul>
1.294 david 1001: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 1002: Pathname validation problems have been found in cvs(1),
1003: allowing clients and servers access to files outside the
1004: repository or local CVS tree.</a>
1.294 david 1005: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 1006: A missing check for a NULL-pointer dereference may allow a
1.281 otto 1007: remote attacker to crash applications using OpenSSL.</a>
1.294 david 1008: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 1009: Defects in the payload validation and processing functions of
1010: isakmpd have been discovered. An attacker could send malformed
1011: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 1012: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 1013: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
1014: access module, using IP addresses without a netmask on big endian
1015: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 1016: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 1017: An IPv6 MTU handling problem exists that could be used by an
1018: attacker to cause a denial of service attack.</a>
1.294 david 1019: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 1020: A reference counting bug in shmat(2) could be used to write to
1021: kernel memory under certain circumstances.</a>
1.294 david 1022: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 1023: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 1024: by Thomas Walpuski.</a>
1.294 david 1025: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 1026: It may be possible for a local user to execute arbitrary code
1027: resulting in escalation of privileges due to a stack overrun
1028: in compat_ibcs2(8).</a>
1.294 david 1029: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 1030: The use of certain ASN.1 encodings or malformed public keys may
1031: allow an attacker to mount a denial of service attack against
1032: applications linked with ssl(3).</a>
1.294 david 1033: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 1034: Access of freed memory in pf(4) could be used to
1.260 margarid 1035: remotely panic a machine using scrub rules.</a>
1.294 david 1036: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 1037: A buffer overflow in the address parsing in
1038: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1039: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 1040: OpenSSH versions prior to 3.7 contains a buffer management error
1041: that is potentially exploitable.</a>
1.294 david 1042: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 1043: Root may be able to reduce the security level by taking advantage of
1044: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 1045: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 1046: An improper bounds check in the kernel may allow a local user
1047: to panic the kernel.</a>
1.294 david 1048: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 1049: An off-by-one error exists in the C library function realpath(3)
1050: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 1051: </ul>
1052:
1.265 miod 1053:
1.247 david 1054: <p>
1.246 deraadt 1055: <li>
1.288 matthieu 1056: <a name="32"></a>
1.224 deraadt 1057:
1.294 david 1058: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 1059: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 1060: in <a href="anoncvs.html">OpenBSD current</a>. The
1061: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 1062: you should update your machine.
1.224 deraadt 1063: <p>
1064: <ul>
1.294 david 1065: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 1066: The use of certain ASN.1 encodings or malformed public keys may
1067: allow an attacker to mount a denial of service attack against
1068: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 1069: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 1070: Access of freed memory in pf(4) could be used to
1.260 margarid 1071: remotely panic a machine using scrub rules.</a>
1.294 david 1072: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 1073: A buffer overflow in the address parsing in
1074: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1075: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 1076: OpenSSH versions prior to 3.7 contains a buffer management error
1077: that is potentially exploitable.</a>
1.294 david 1078: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 1079: Fix for a potential security issue in
1080: sendmail(8) with respect to DNS maps.</a>
1.294 david 1081: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1082: An off-by-one error exists in the C library function realpath(3)
1083: may allow an attacker to gain escalated privileges.</a>
1.294 david 1084: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1085: A buffer overflow in the address parsing in
1086: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1087: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1088: A cryptographic weaknesses in the Kerberos v4 protocol can be
1089: exploited on Kerberos v5 as well.</a>
1.294 david 1090: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1091: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1092: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1093: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1094: Various SSL and TLS operations in OpenSSL are vulnerable to
1095: timing attacks.</a>
1.294 david 1096: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1097: A buffer overflow in lprm(1) may allow an attacker to elevate
1.392 tobias 1098: privileges to user daemon.</a>
1.294 david 1099: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1100: A buffer overflow in the envelope comments processing in
1101: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1102: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1103: httpd(8) leaks file inode numbers via ETag header as well as
1104: child PIDs in multipart MIME boundary generation. This could
1105: lead, for example, to NFS exploitation because it uses inode
1106: numbers as part of the file handle.</a>
1.294 david 1107: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1108: In ssl(8) an information leak can occur via timing by performing
1109: a MAC computation even if incorrect block cipher padding has
1110: been found, this is a countermeasure. Also, check for negative
1111: sizes, in allocation routines.</a>
1.294 david 1112: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1113: A double free exists in cvs(1) that could lead to privilege
1114: escalation for cvs configurations where the cvs command is
1.233 margarid 1115: run as a privileged user.</a>
1.294 david 1116: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1117: A buffer overflow exists in named(8) that could lead to a
1118: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1119: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1120: A logic error in the pool kernel memory allocator could cause
1121: memory corruption in low-memory situations, causing the system
1122: to crash.</a>
1.294 david 1123: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1124: An attacker can bypass smrsh(8)'s restrictions and execute
1125: arbitrary commands with the privileges of his own account.</a>
1.294 david 1126: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1127: Network bridges running pf with scrubbing enabled could cause
1128: mbuf corruption, causing the system to crash.</a>
1.294 david 1129: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1130: A buffer overflow can occur in the kadmind(8) daemon, leading
1131: to possible remote crash or exploit.</a>
1.224 deraadt 1132: </ul>
1133:
1.227 miod 1134: <p>
1135: <li>
1.288 matthieu 1136: <a name="31"></a>
1.203 deraadt 1137:
1.294 david 1138: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1139: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1140: in <a href="anoncvs.html">OpenBSD current</a>. The
1141: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1142: you should update your machine.
1.203 deraadt 1143:
1144: <p>
1145: <ul>
1.294 david 1146: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1147: A buffer overflow in the address parsing in
1148: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1149: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1150: A cryptographic weaknesses in the Kerberos v4 protocol can be
1151: exploited on Kerberos v5 as well.</a>
1.294 david 1152: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1153: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1154: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1155: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1156: Various SSL and TLS operations in OpenSSL are vulnerable to
1157: timing attacks.</a>
1.294 david 1158: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1159: A buffer overflow in lprm(1) may allow an attacker to gain
1160: root privileges.</a>
1.294 david 1161: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1162: A buffer overflow in the envelope comments processing in
1163: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1164: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1165: In ssl(8) an information leak can occur via timing by performing
1166: a MAC computation even if incorrect block cipher padding has
1167: been found, this is a countermeasure. Also, check for negative
1168: sizes, in allocation routines.</a>
1.294 david 1169: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1170: A double free exists in cvs(1) that could lead to privilege
1171: escalation for cvs configurations where the cvs command is
1.392 tobias 1172: run as a privileged user.</a>
1.294 david 1173: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1174: A buffer overflow exists in named(8) that could lead to a
1175: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1176: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1177: Incorrect argument checking in the getitimer(2) system call
1178: may allow an attacker to crash the system.</a>
1.294 david 1179: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1180: An attacker can bypass smrsh(8)'s restrictions and execute
1181: arbitrary commands with the privileges of his own account.</a>
1.294 david 1182: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1183: A buffer overflow can occur in the kadmind(8) daemon, leading
1184: to possible remote crash or exploit.</a>
1.294 david 1185: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1186: Incorrect argument checking in the setitimer(2) system call
1187: may allow an attacker to write to kernel memory.</a>
1.294 david 1188: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1189: An insufficient boundary check in the select system call
1.220 miod 1190: allows an attacker to overwrite kernel memory and execute arbitrary code
1191: in kernel context.</a>
1.294 david 1192: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1193: Several remote buffer overflows can occur in the SSL2 server and SSL3
1194: client of the ssl(8) library, as in the ASN.1 parser code in the
1195: crypto(3) library, all of them being potentially remotely
1196: exploitable.</a>
1.294 david 1197: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1198: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1199: possible remote crash.</a>
1.294 david 1200: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1201: A race condition exists in the pppd(8) daemon which may cause it to
1202: alter the file permissions of an arbitrary file.</a>
1.294 david 1203: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1204: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1205: crash.</a>
1.294 david 1206: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1207: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1208: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1209: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1210: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1211: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1212: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1213: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1214: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1215: input validation error that can result in an integer overflow and
1216: privilege escalation.</a>
1.294 david 1217: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1218: A buffer overflow can occur during the interpretation of chunked
1219: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1220: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1221: Under certain conditions, on systems using YP with netgroups
1222: in the password database, it is possible that sshd(8) does
1223: ACL checks for the requested user name but uses the password
1224: database entry of a different user for authentication. This
1225: means that denied users might authenticate successfully
1226: while permitted users could be locked out.</a>
1.294 david 1227: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1228: A race condition exists that could defeat the kernel's
1229: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1230: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1231: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1232: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1233: A local user can gain super-user privileges due to a buffer
1234: overflow in sshd(8) if AFS has been configured on the system
1235: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1236: in the sshd_config file.</a>
1.203 deraadt 1237: </ul>
1238:
1.235 miod 1239: <p>
1.203 deraadt 1240: <li>
1.288 matthieu 1241: <a name="30"></a>
1.187 deraadt 1242:
1.294 david 1243: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1244: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1245: in <a href="anoncvs.html">OpenBSD current</a>. The
1246: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1247: you should update your machine.
1.187 deraadt 1248:
1249: <p>
1250: <ul>
1.294 david 1251: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1252: A buffer overflow exists in named(8) that could lead to a
1253: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1254: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1255: Incorrect argument checking in the getitimer(2) system call
1256: may allow an attacker to crash the system.</a>
1.294 david 1257: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1258: An attacker can bypass smrsh(8)'s restrictions and execute
1259: arbitrary commands with the privileges of his own account.</a>
1.294 david 1260: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1261: A buffer overflow can occur in the kadmind(8) daemon, leading
1262: to possible remote crash or exploit.</a>
1.294 david 1263: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1264: Incorrect argument checking in the setitimer(2) system call
1265: may allow an attacker to write to kernel memory.</a>
1.294 david 1266: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1267: An insufficient boundary check in the select and poll system calls
1268: allows an attacker to overwrite kernel memory and execute arbitrary code
1269: in kernel context.</a>
1.294 david 1270: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1271: Several remote buffer overflows can occur in the SSL2 server and SSL3
1272: client of the ssl(8) library, as in the ASN.1 parser code in the
1273: crypto(3) library, all of them being potentially remotely
1274: exploitable.</a>
1.294 david 1275: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1276: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1277: possible remote crash.</a>
1.294 david 1278: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1279: A race condition exists in the pppd(8) daemon which may cause it to
1280: alter the file permissions of an arbitrary file.</a>
1.294 david 1281: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1282: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1283: crash.</a>
1.294 david 1284: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1285: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1286: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1287: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1288: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1289: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1290: input validation error that can result in an integer overflow and
1291: privilege escalation.</a>
1.294 david 1292: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1293: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1294: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1295: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1296: A buffer overflow can occur during the interpretation of chunked
1297: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1298: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1299: A race condition exists that could defeat the kernel's
1300: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1301: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1302: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1303: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1304: A local user can gain super-user privileges due to a buffer
1305: overflow in sshd(8) if AFS has been configured on the system
1306: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1307: in the sshd_config file.</a>
1.294 david 1308: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1309: The mail(1) was interpreting tilde escapes even when invoked
1310: in non-interactive mode. As mail(1) is called as root from cron,
1311: this can lead to a local root compromise.</a>
1.294 david 1312: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1313: Under certain conditions, on systems using YP with netgroups in
1314: the password database, it is possible for the rexecd(8) and rshd(8)
1315: daemons to execute a shell from a password database entry for a
1316: different user. Similarly, atrun(8) may change to the wrong
1317: home directory when running jobs.</a>
1.294 david 1318: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1319: A potential double free() exists in the zlib library;
1320: this is not exploitable on OpenBSD.
1321: The kernel also contains a copy of zlib; it is not
1322: currently known if the kernel zlib is exploitable.</a>
1.294 david 1323: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1324: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1325: may allow a local user to gain super-user privileges.</a>
1.294 david 1326: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1327: A race condition between the ptrace(2) and execve(2) system calls
1328: allows an attacker to modify the memory contents of suid/sgid
1329: processes which could lead to compromise of the super-user account.</a>
1.294 david 1330: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1331: There is a security hole in sudo(8) that can be exploited
1332: when the Postfix sendmail replacement is installed that may
1333: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1334: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1335: An attacker can trick a machine running the lpd daemon into
1336: creating new files in the root directory from a machine with
1337: remote line printer access.</a>
1.294 david 1338: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1339: The vi.recover script can be abused in such a way as
1340: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1341: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1342: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1343: resulting in a crash.</a>
1.294 david 1344: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1345: A security hole that may allow an attacker to partially authenticate
1346: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1347: </ul>
1348:
1349: <p>
1350: <li>
1.288 matthieu 1351: <a name="29"></a>
1.173 deraadt 1352:
1.294 david 1353: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1354: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1355: in <a href="anoncvs.html">OpenBSD current</a>. The
1356: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1357: you should update your machine.
1358:
1.173 deraadt 1359:
1360: <p>
1361: <ul>
1.294 david 1362: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1363: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1364: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1365: A race condition exists that could defeat the kernel's
1366: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1367: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1368: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1369: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1370: A local user can gain super-user privileges due to a buffer
1371: overflow in sshd(8) if AFS has been configured on the system
1372: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1373: in the sshd_config file.</a>
1.294 david 1374: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1375: The mail(1) was interpreting tilde escapes even when invoked
1376: in non-interactive mode. As mail(1) is called as root from cron,
1377: this can lead to a local root compromise.</a>
1.294 david 1378: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1379: A potential double free() exists in the zlib library;
1380: this is not exploitable on OpenBSD.
1381: The kernel also contains a copy of zlib; it is not
1382: currently known if the kernel zlib is exploitable.</a>
1.294 david 1383: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1384: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1385: may allow a local user to gain super-user privileges.</a>
1.294 david 1386: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1387: A race condition between the ptrace(2) and execve(2) system calls
1388: allows an attacker to modify the memory contents of suid/sgid
1389: processes which could lead to compromise of the super-user account.</a>
1.294 david 1390: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1391: There is a security hole in sudo(8) that can be exploited
1392: when the Postfix sendmail replacement is installed that may
1393: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1394: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1395: An attacker can trick a machine running the lpd daemon into
1396: creating new files in the root directory from a machine with
1397: remote line printer access.</a>
1.294 david 1398: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1399: The vi.recover script can be abused in such a way as
1400: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1401: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1402: A security hole exists in uuxqt(8) that may allow an
1403: attacker to gain root privileges.</a>
1.294 david 1404: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1405: A security hole exists in lpd(8) that may allow an
1406: attacker to gain root privileges if lpd is running.</a>
1.294 david 1407: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1408: A security hole exists in sendmail(8) that may allow an
1409: attacker on the local host to gain root privileges.</a>
1.294 david 1410: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1411: A kernel buffer overflow in the NFS code can be used to execute
1412: arbitrary code by users with mount privileges (only root by
1.181 millert 1413: default).</a>
1.294 david 1414: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1415: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1416: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1417: sshd(8) allows users to delete arbitrary files named "cookies"
1418: if X11 forwarding is enabled. X11 forwarding is disabled
1419: by default.</a>
1.294 david 1420: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1421: Programs using the fts routines can be tricked into changing
1422: into the wrong directory.</a>
1.294 david 1423: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1424: Sendmail signal handlers contain unsafe code,
1425: leading to numerous race conditions.</a>
1.173 deraadt 1426: </ul>
1427:
1428: <p>
1429: <li>
1.288 matthieu 1430: <a name="28"></a>
1.152 deraadt 1431:
1.294 david 1432: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1433: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1434: in <a href="anoncvs.html">OpenBSD current</a>. The
1435: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1436: you should update your machine.
1437:
1.152 deraadt 1438:
1439: <p>
1440: <ul>
1.294 david 1441: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1442: A security hole exists in uuxqt(8) that may allow an
1443: attacker to gain root privileges.</a>
1.294 david 1444: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1445: A security hole exists in lpd(8) that may allow an
1446: attacker to gain root privileges if lpd is running.</a>
1.294 david 1447: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1448: A security hole exists in sendmail(8) that may allow an
1449: attacker on the local host to gain root privileges.</a>
1.294 david 1450: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1451: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1452: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1453: Programs using the fts routines can be tricked into changing
1454: into the wrong directory.</a>
1.294 david 1455: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1456: Sendmail signal handlers contain unsafe code,
1457: leading to numerous race conditions.</a>
1.294 david 1458: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1459: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1460: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1461: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1462: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1463: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1464: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1465: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1466: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1467: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1468: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1469: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1470: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1471: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1472: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1473: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1474: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1475: rnd(4) did not use all of its input when written to.</a>
1.294 david 1476: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1477: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1478: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1479: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1480: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1481: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1482: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1483: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1484: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1485: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1486: </ul>
1487:
1488: <p>
1489: <li>
1.288 matthieu 1490: <a name="27"></a>
1.124 deraadt 1491:
1.294 david 1492: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1493: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1494: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1495: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1496:
1497: <p>
1498: <ul>
1.294 david 1499: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1500: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1501: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1502: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1503: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1504: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1505: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1506: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1507: (patch included)</a>
1.294 david 1508: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1509: X11 libraries have 2 potential overflows in xtrans code.
1510: (patch included)</a>
1.294 david 1511: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1512: Apache mod_rewrite and mod_vhost_alias modules could expose files
1513: on the server in certain configurations if used.
1514: (patch included)</a>
1.294 david 1515: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1516: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1517: TERMPATH and TERMCAP environment variables as it should.
1518: (patch included)</a>
1.294 david 1519: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1520: There are printf-style format string bugs in several privileged
1521: programs. (patch included)</a>
1.294 david 1522: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1523: libcurses honored terminal descriptions in the $HOME/.terminfo
1524: directory as well as in the TERMCAP environment variable for
1525: setuid and setgid applications.
1.146 deraadt 1526: (patch included)</a>
1.294 david 1527: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1528: A format string vulnerability exists in talkd(8).
1529: (patch included)</a>
1.294 david 1530: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1531: A format string vulnerability exists in the pw_error() function of the
1532: libutil library, yielding localhost root through chpass(1).
1533: (patch included)</a>
1.294 david 1534: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1535: Bad ESP/AH packets could cause a crash under certain conditions.
1536: (patch included)</a>
1.294 david 1537: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1538: A format string vulnerability (localhost root) exists in xlock(1).
1539: (patch included)</a>
1.294 david 1540: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1541: Various bugs found in X11 libraries have various side effects, almost
1542: completely denial of service in OpenBSD.
1543: (patch included)</a>
1.294 david 1544: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1545: Just like pretty much all the other unix ftp daemons
1546: on the planet, ftpd had a remote root hole in it.
1547: Luckily, ftpd was not enabled by default.
1.137 deraadt 1548: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1549: (patch included)</a>
1.294 david 1550: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1551: Mopd, very rarely used, contained some buffer overflows.
1552: (patch included)</a>
1.294 david 1553: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1554: libedit would check for a <b>.editrc</b> file in the current
1555: directory. Not known to be a real security issue, but a patch
1556: is available anyways.
1557: (patch included)</a>
1.294 david 1558: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1559: A serious bug in dhclient(8) could allow strings from a
1560: malicious dhcp server to be executed in the shell as root.
1561: (patch included)</a>
1.294 david 1562: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1563: A serious bug in isakmpd(8) policy handling wherein
1564: policy verification could be completely bypassed in isakmpd.
1565: (patch included)</a>
1.294 david 1566: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1567: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1568: should not be used, and results in security problems on
1569: other operating systems.</a>
1.294 david 1570: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1571: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1572: (patch included)</a>
1.294 david 1573: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1574: Improper use of ipf <i>keep-state</i> rules can result
1575: in firewall rules being bypassed. (patch included)</a>
1576:
1.124 deraadt 1577: </ul>
1578:
1579: <p>
1580: <li>
1.288 matthieu 1581: <a name="26"></a>
1.119 deraadt 1582:
1.294 david 1583: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1584: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1585: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1586: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1587:
1588: <p>
1589: <ul>
1.294 david 1590: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1591: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1592: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1593: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1594: Improper use of ipf <i>keep-state</i> rules can result
1595: in firewall rules being bypassed. (patch included)</a>
1.294 david 1596: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1597: xlockmore has a bug which a localhost attacker can use to gain
1598: access to the encrypted root password hash (which is normally
1.245 miod 1599: encoded using blowfish</a> (see
1.294 david 1600: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1601: crypt(3)</a>)
1.245 miod 1602: (patch included).
1.294 david 1603: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1604: Systems running with procfs enabled and mounted are
1605: vulnerable to a very tricky exploit. procfs is not
1606: mounted by default.
1607: (patch included).</a>
1.294 david 1608: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1609: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1610: thus exposing the system to a race where the aliases file
1611: did not exist.
1.119 deraadt 1612: (patch included).</a>
1.294 david 1613: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1614: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1615: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1616: A buffer overflow in the RSAREF code included in the
1617: USA version of libssl, is possibly exploitable in
1618: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1619: (patch included).<br></a>
1620: <strong>Update:</strong> Turns out that this was not exploitable
1621: in any of the software included in OpenBSD 2.6.
1.294 david 1622: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1623: Any user could change interface media configurations, resulting in
1624: a localhost denial of service attack.
1.121 deraadt 1625: (patch included).</a>
1.119 deraadt 1626: </ul>
1627:
1628: <p>
1629: <li>
1.288 matthieu 1630: <a name="25"></a>
1.106 deraadt 1631:
1.294 david 1632: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1633: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1634: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1635: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1636:
1.96 deraadt 1637: <p>
1.104 deraadt 1638: <ul>
1.294 david 1639: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1640: In cron(8), make sure argv[] is NULL terminated in the
1641: fake popen() and run sendmail as the user, not as root.
1642: (patch included).</a>
1.294 david 1643: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1644: filesystems had an overrun in their handling of uio_offset
1645: in their readdir() routines. (These filesystems are not
1646: enabled by default). (patch included).</a>
1.294 david 1647: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1648: when we execve() a new process. (patch included).</a>
1.294 david 1649: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1650: been handled by IPsec may be transmitted as cleartext.
1651: PF_KEY SA expirations may leak kernel resources.
1652: (patch included).</a>
1.294 david 1653: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1654: motd re-writing and change the find(1) to use -execdir
1655: (patch included).</a>
1.294 david 1656: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1657: users to chflags(2) or fchflags(2) on character or block devices
1658: which they may currently be the owner of (patch included).</a>
1.294 david 1659: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1660: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1661: </ul>
1662:
1.106 deraadt 1663: <p>
1664: <li>
1.288 matthieu 1665: <a name="24"></a>
1.235 miod 1666:
1.294 david 1667: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1668: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1669: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1670: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1671:
1.96 deraadt 1672: <p>
1.75 deraadt 1673: <ul>
1.294 david 1674: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1675: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1676: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1677: another kernel crash case caused by the <strong>crashme</strong>
1678: program (patch included).</a>
1.294 david 1679: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1680: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1681: (patch included).</a>
1.294 david 1682: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1683: existed in ping(8). (patch included).</a>
1.294 david 1684: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1685: the ipq, which could permit an attacker to cause a crash.
1686: (patch included).</a>
1.294 david 1687: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1688: kernel between accept(2) and select(2) could permit an attacker
1689: to hang sockets from remote.
1690: (patch included).</a>
1.294 david 1691: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1692: bog the machine excessively and cause problems.
1693: (patch included).</a>
1.294 david 1694: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1695: DDB interacted to possibly cause a crash.
1696: (patch included).</a>
1.294 david 1697: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1698: (patch included).</a>
1.294 david 1699: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1700: problem in bootpd(8). (patch included).</a>
1.294 david 1701: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1702: exploitable problem relating to environment variables in termcap
1703: and curses. (patch included).</a>
1.294 david 1704: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1705: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1706: </ul>
1707:
1.106 deraadt 1708: <p>
1709: <li>
1.288 matthieu 1710: <a name="23"></a>
1.235 miod 1711:
1.294 david 1712: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1713: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1714: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1715: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1716:
1.96 deraadt 1717: <p>
1.53 matthieu 1718: <ul>
1.294 david 1719: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1720: problem in bootpd(8). (patch included).</a>
1.294 david 1721: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1722: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1723: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1724: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1725: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1726: chpass(1) has a file descriptor leak which allows an
1727: attacker to modify /etc/master.passwd.</a>
1.294 david 1728: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1729: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1730: should not be executed with fd slots 0, 1, or 2 free.
1731: (patch included).</a>
1.294 david 1732: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1733: libraries (patches included).</a>
1.294 david 1734: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1735: processes too permissive (4th revision patch included).</a>
1.294 david 1736: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1737: of immutable and append-only file flags. (patch included).</a>
1.294 david 1738: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1739: if IPSEC is enabled (patch included).</a>
1.294 david 1740: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1741: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1742: </ul>
1.9 deraadt 1743:
1.106 deraadt 1744: <p>
1745: <li>
1.288 matthieu 1746: <a name="22"></a>
1.235 miod 1747:
1.294 david 1748: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1749: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1750: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1751: still exist in other operating systems. (The supplied patches are for
1752: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1753:
1.96 deraadt 1754: <p>
1.9 deraadt 1755: <ul>
1.294 david 1756: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1757: packets if IPSEC is enabled (patch included).</a>
1.294 david 1758: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1759: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1760: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1761: (patch included).</a>
1.294 david 1762: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1763: (patch included).</a>
1.294 david 1764: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1765: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1766: (patch included).</a>
1.294 david 1767: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1768: export (patch included).</a>
1.112 philen 1769: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1770: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1771: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1772: Acceptance.</a>
1.294 david 1773: A patch is available <a href="errata22.html#sourceroute">here</a>.
1774: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1775: flaw (patch included).</a>
1.294 david 1776: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1777: </ul>
1778:
1.106 deraadt 1779: <p>
1780: <li>
1.288 matthieu 1781: <a name="21"></a>
1.235 miod 1782:
1.294 david 1783: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1784: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1785: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1786: exist in other operating systems. (If you are running OpenBSD 2.1, we
1787: would strongly recommend an upgrade to the newest release, as this
1788: patch list only attempts at fixing the most important security
1789: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1790: security problems. Many of those problems were solved in ways which
1791: make it hard for us to provide patches).
1792:
1.96 deraadt 1793: <p>
1.52 deraadt 1794: <ul>
1.112 philen 1795: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1796: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1797: (patch included)</a>
1.112 philen 1798: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1799: </ul>
1.51 deraadt 1800:
1.106 deraadt 1801: <p>
1802: <li>
1.288 matthieu 1803: <a name="20"></a>
1.235 miod 1804:
1.294 david 1805: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1806: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1807: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1808: exist in other operating systems. (If you are running OpenBSD 2.0, we
1809: commend you for being there back in the old days!, but you're really
1810: missing out if you don't install a new version!)
1811:
1812: <p>
1813: <ul>
1.112 philen 1814: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1815: resolver (patch included)</a>
1816: <li>Many others... if people can hunt them down, please let me know
1817: and we'll put them up here.
1818: </ul>
1.51 deraadt 1819: <p>
1.106 deraadt 1820:
1.288 matthieu 1821: <a name="watching"></a>
1.294 david 1822: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1823:
1.21 deraadt 1824: Since we take a proactive stance with security, we are continually
1825: finding and fixing new security problems. Not all of these problems
1.80 espie 1826: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1827: confirmed to be exploitable; many simple bugs we fix do turn out to
1828: have security consequences we could not predict. We do not have the
1829: time resources to make these changes available in the above format.<p>
1.21 deraadt 1830:
1831: Thus there are usually minor security fixes in the current source code
1832: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1833: guarantee that these problems are of minimal impact and unproven
1.44 ian 1834: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1835: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1836:
1.45 deraadt 1837: People who are really concerned with security can do a number of
1838: things:<p>
1.21 deraadt 1839:
1840: <ul>
1841: <li>If you understand security issues, watch our
1.294 david 1842: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1843: eye out for things which appear security related. Since
1.21 deraadt 1844: exploitability is not proven for many of the fixes we make,
1845: do not expect the relevant commit message to say "SECURITY FIX!".
1846: If a problem is proven and serious, a patch will be available
1847: here very shortly after.
1.161 horacio 1848: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1849: security-announce mailing list</a> which will notify you for every
1.186 ian 1850: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1851: and instruct you on how to patch the problem.
1.21 deraadt 1852: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1853: complete system build from time to time (read /usr/src/Makefile
1854: carefully). Users can make the assumption that the current
1855: source tree always has stronger security than the previous release.
1.45 deraadt 1856: However, building your own system from source code is not trivial;
1.397 deraadt 1857: it is nearly 850MB of source code, and problems do occur as we
1.45 deraadt 1858: transition between major releases.
1.115 ericj 1859: <li>Install a binary snapshot for your
1.80 espie 1860: architecture, which are made available fairly often. For
1.29 deraadt 1861: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1862: </ul>
1863:
1.9 deraadt 1864: <p>
1.288 matthieu 1865: <a name="reporting"></a>
1.294 david 1866: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1867:
1.5 deraadt 1868: <p> If you find a new security problem, you can mail it to
1.294 david 1869: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1870: <br>
1.5 deraadt 1871: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1872: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1873:
1.107 deraadt 1874: <p>
1.288 matthieu 1875: <a name="papers"></a>
1.294 david 1876: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1877:
1.389 lum 1878: Numerous
1879: <a href="papers/">papers</a> have been written by OpenBSD team members,
1880: many dedicated to security.
1.294 david 1881: </ul>
1.106 deraadt 1882:
1.2 deraadt 1883: <hr>
1.294 david 1884: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1885: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1886: <br>
1.402 ! matthieu 1887: <small>$OpenBSD: security.html,v 1.401 2014/01/10 20:09:05 matthieu Exp $</small>
1.1 deraadt 1888:
1.24 deraadt 1889: </body>
1890: </html>
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