Annotation of www/security.html, Revision 1.393
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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
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>,
75: <a href="#51">5.1</a>.
1.114 philen 76: </td>
77: </tr>
78: </table>
1.56 deraadt 79: <hr>
80:
1.294 david 81: <a name="goals"></a>
1.278 deraadt 82: <ul>
1.294 david 83: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 84:
1.14 deraadt 85: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 86: ONE in the industry for security (if we are not already there). Our
87: open software development model permits us to take a more
88: uncompromising view towards increased security than Sun, SGI, IBM, HP,
89: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 90: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 91: cryptography</a>, we are able to take cryptographic approaches towards
92: fixing security problems.<p>
1.18 deraadt 93:
1.288 matthieu 94: <a name="disclosure"></a>
1.294 david 95: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 96:
1.45 deraadt 97: Like many readers of the
1.196 jufi 98: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 99: BUGTRAQ mailing list</a>,
1.106 deraadt 100: we believe in full disclosure of security problems. In the
101: operating system arena, we were probably the first to embrace
102: the concept. Many vendors, even of free software, still try
103: to hide issues from their users.<p>
104:
105: Security information moves very fast in cracker circles. On the other
106: hand, our experience is that coding and releasing of proper security
107: fixes typically requires about an hour of work -- very fast fix
108: turnaround is possible. Thus we think that full disclosure helps the
109: people who really care about security.<p>
110:
1.288 matthieu 111: <a name="process"></a>
1.294 david 112: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 113:
1.12 deraadt 114: Our security auditing team typically has between six and twelve
1.45 deraadt 115: members who continue to search for and fix new security holes. We
116: have been auditing since the summer of 1996. The process we follow to
117: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 118: every critical software component. We are not so much looking for
119: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 120: years later someone discovers the problem used to be a security
1.106 deraadt 121: issue, and we fixed it because it was just a bug, well, all the
122: better. Flaws have been found in just about every area of the system.
123: Entire new classes of security problems have been found during our
124: audit, and often source code which had been audited earlier needs
125: re-auditing with these new flaws in mind. Code often gets audited
126: multiple times, and by multiple people with different auditing
127: skills.<p>
1.12 deraadt 128:
1.94 deraadt 129: Some members of our security auditing team worked for Secure Networks,
130: the company that made the industry's premier network security scanning
131: software package Ballista (Secure Networks got purchased by Network
132: Associates, Ballista got renamed to Cybercop Scanner, and well...)
133: That company did a lot of security research, and thus fit in well
1.106 deraadt 134: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
135: colours since day 1.<p>
1.31 deraadt 136:
1.34 deraadt 137: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 138: In most cases we have found that the determination of exploitability
139: is not an issue. During our ongoing auditing process we find many
140: bugs, and endeavor to fix them even though exploitability is not
141: proven. We fix the bug, and we move on to find other bugs to fix. We
142: have fixed many simple and obvious careless programming errors in code
143: and only months later discovered that the problems were in fact
144: exploitable. (Or, more likely someone on
1.197 jufi 145: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 146: would report that other operating systems were vulnerable to a `newly
147: discovered problem', and then it would be discovered that OpenBSD had
148: been fixed in a previous release). In other cases we have been saved
149: from full exploitability of complex step-by-step attacks because we
150: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 151: managed such a success is the lpd advisory that Secure Networks put out.
152: <p>
1.29 deraadt 153:
1.288 matthieu 154: <a name="newtech"></a>
1.294 david 155: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 156:
157: As we audit source code, we often invent new ways of solving problems.
158: Sometimes these ideas have been used before in some random application
159: written somewhere, but perhaps not taken to the degree that we do.
160: <p>
161:
162: <ul>
163: <li>strlcpy() and strlcat()
164: <li>Memory protection purify
165: <ul>
166: <li>W^X
167: <li>.rodata segment
168: <li>Guard pages
169: <li>Randomized malloc()
170: <li>Randomized mmap()
171: <li>atexit() and stdio protection
172: </ul>
1.295 otto 173: <li>Privilege separation
1.278 deraadt 174: <li>Privilege revocation
175: <li>Chroot jailing
176: <li>New uids
177: <li>ProPolice
178: <li>... and others
179: </ul>
180: <p>
181:
1.294 david 182: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 183:
1.45 deraadt 184: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 185: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 186: commonplace in security forums like
1.197 jufi 187: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 188:
1.45 deraadt 189: The most intense part of our security auditing happened immediately
1.80 espie 190: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 191: over the last third of 1996 and first half of 1997. Thousands (yes,
192: thousands) of security issues were fixed rapidly over this year-long
193: period; bugs like the standard buffer overflows, protocol
194: implementation weaknesses, information gathering, and filesystem
195: races. Hence most of the security problems that we encountered were
196: fixed before our 2.1 release, and then a far smaller number needed
197: fixing for our 2.2 release. We do not find as many problems anymore,
198: it is simply a case of diminishing returns. Recently the security
199: problems we find and fix tend to be significantly more obscure or
200: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 201:
1.35 deraadt 202: <ul>
1.45 deraadt 203: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 204: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 205: to search for more complicated exploits, so we will too.
206: <li>Finding and fixing subtle flaws in complicated software is
207: a lot of fun.
1.35 deraadt 208: </ul>
1.106 deraadt 209: <p>
1.15 deraadt 210:
1.14 deraadt 211: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 212: to find and fix new security flaws.<p>
1.12 deraadt 213:
1.288 matthieu 214: <a name="default"></a>
1.294 david 215: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 216:
217: To ensure that novice users of OpenBSD do not need to become security
218: experts overnight (a viewpoint which other vendors seem to have), we
219: ship the operating system in a Secure by Default mode. All non-essential
220: services are disabled. As the user/administrator becomes more familiar
221: with the system, he will discover that he has to enable daemons and other
222: parts of the system. During the process of learning how to enable a new
223: service, the novice is more likely to learn of security considerations.<p>
224:
225: This is in stark contrast to the increasing number of systems that
226: ship with NFS, mountd, web servers, and various other services enabled
227: by default, creating instantaneous security problems for their users
228: within minutes after their first install.<p>
229:
1.288 matthieu 230: <a name="crypto"></a>
1.294 david 231: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 232:
233: And of course, since the OpenBSD project is based in Canada, it is possible
234: for us to integrate cryptography. For more information, read the page
1.116 deraadt 235: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 236:
1.294 david 237: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 238:
239: <li>
1.393 ! sthen 240: <a name="52"></a>
! 241:
! 242: <h3><font color="#e00000">OpenBSD 5.2 Security Advisories</font></h3>
! 243: These are the OpenBSD 5.2 advisories -- all these problems are solved
! 244: in <a href=anoncvs.html>OpenBSD current</a> and the
! 245: <a href=stable.html>patch branch</a>.
! 246:
! 247: <p>
! 248: <ul>
! 249: None yet!
! 250: </ul>
! 251:
! 252: <li>
1.390 sthen 253: <a name="51"></a>
254:
255: <h3><font color="#e00000">OpenBSD 5.1 Security Advisories</font></h3>
256: These are the OpenBSD 5.1 advisories -- all these problems are solved
257: in <a href=anoncvs.html>OpenBSD current</a> and the
258: <a href=stable.html>patch branch</a>.
259:
260: <p>
261: <ul>
1.393 ! sthen 262: <li><a href="errata51.html#001_libcrypto">April 23, 2012:
! 263: A heap overflow vulnerability has been found in libcrypto's ASN.1
! 264: parsing code (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.390 sthen 265: </ul>
266:
1.393 ! sthen 267: <p>
! 268: OpenBSD 5.0 and earlier releases are not supported anymore. The following
! 269: paragraphs only list advisories issued while they were maintained; these
! 270: releases are likely to be affected by the advisories for more recent releases.
! 271: <br>
! 272:
1.390 sthen 273: <li>
1.388 miod 274: <a name="50"></a>
275:
276: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
277: These are the OpenBSD 5.0 advisories -- all these problems are solved
278: in <a href=anoncvs.html>OpenBSD current</a> and the
279: <a href=stable.html>patch branch</a>.
280:
281: <p>
282: <ul>
1.393 ! sthen 283: <li><a href="errata50.html#002_libcrypto">April 23, 2012:
! 284: A heap overflow vulnerability has been found in libcrypto's ASN.1
! 285: parsing code (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.388 miod 286: </ul>
287:
288: <li>
1.387 miod 289: <a name="49"></a>
290:
291: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
292: These are the OpenBSD 4.9 advisories -- all these problems are solved
293: in <a href=anoncvs.html>OpenBSD current</a> and the
294: <a href=stable.html>patch branch</a>.
295:
296: <p>
297: <ul>
298: None yet!
299: </ul>
300:
301: <li>
302: <a name="48"></a>
303:
304: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
305: These are the OpenBSD 4.8 advisories -- all these problems are solved
306: in <a href=anoncvs.html>OpenBSD current</a> and the
307: <a href=stable.html>patch branch</a>.
308:
309: <p>
310: <ul>
311: <li><a href="errata48.html#009_pf">February 16, 2011:
312: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
313: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
314: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
315: prefixes "10.1.1.1/30") are not affected.</a>
316: <li><a href="errata48.html#008_openssl">February 11, 2011:
317: An incorrectly formatted ClientHello handshake message could cause
318: OpenSSL to parse past the end of the message. An attacker could use
319: this flaw to trigger an invalid memory access, causing a crash of an
320: application linked to OpenSSL. As well, certain applications may expose
321: the contents of parsed OCSP extensions, specifically the OCSP nonce
322: extension.
323: <br>
324: Applications are only affected if they act as a server and call
325: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
326: that nothing in the base OS uses this. Apache httpd started using this
327: in v2.3.3; this is newer than the version in ports.</a>
328: <li><a href="errata48.html#005_pf">December 17, 2010:
329: Insufficent initialization of the pf rule structure in the ioctl
330: handler may allow userland to modify kernel memory. By default root
331: privileges are needed to add or modify pf rules.</a>
332: </ul>
333:
334: <li>
1.385 jasper 335: <a name="47"></a>
336:
337: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
338: These are the OpenBSD 4.7 advisories -- all these problems are solved
339: in <a href=anoncvs.html>OpenBSD current</a> and the
340: <a href=stable.html>patch branch</a>.
341:
342: <p>
343: <ul>
1.387 miod 344: <li><a href="errata47.html#013_pf">February 16, 2011:
345: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
346: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
347: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
348: prefixes "10.1.1.1/30") are not affected.</a>
349: <li><a href="errata47.html#012_openssl">February 11, 2011:
350: An incorrectly formatted ClientHello handshake message could cause
351: OpenSSL to parse past the end of the message. An attacker could use
352: this flaw to trigger an invalid memory access, causing a crash of an
353: application linked to OpenSSL. As well, certain applications may expose
354: the contents of parsed OCSP extensions, specifically the OCSP nonce
355: extension.
356: <br>
357: Applications are only affected if they act as a server and call
358: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
359: that nothing in the base OS uses this. Apache httpd started using this
360: in v2.3.3; this is newer than the version in ports.</a>
361: <li><a href="errata47.html#009_pf">December 17, 2010:
362: Insufficent initialization of the pf rule structure in the ioctl
363: handler may allow userland to modify kernel memory. By default root
364: privileges are needed to add or modify pf rules.</a>
365: <li><a href="errata47.html#004_pfsync">April 23, 2010:
366: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 367: <li><a href="errata47.html#003_openssl">April 14, 2010:
368: In TLS connections, certain incorrectly formatted records can
369: cause an OpenSSL client or server to crash due to a read
1.392 tobias 370: attempt at NULL.</a>
1.385 jasper 371: </ul>
372:
373: <li>
1.378 jasper 374: <a name="46"></a>
375:
376: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
377: These are the OpenBSD 4.6 advisories -- all these problems are solved
378: in <a href=anoncvs.html>OpenBSD current</a> and the
379: <a href=stable.html>patch branch</a>.
380:
381: <p>
382: <ul>
1.385 jasper 383: <li><a href="errata46.html#010_openssl">April 14, 2010:
384: In TLS connections, certain incorrectly formatted records can
385: cause an OpenSSL client or server to crash due to a read
1.392 tobias 386: attempt at NULL.</a>
1.384 jasper 387: <li><a href="errata46.html#006_openssl">March 12, 2010:
388: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 389: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 390: <li><a href="errata46.html#004_openssl">November 26, 2009:
391: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 392: related to renegotiation.</a>
1.378 jasper 393: </ul>
1.382 tobias 394:
395: <li>
1.373 djm 396: <a name="45"></a>
397:
398: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
399: These are the OpenBSD 4.5 advisories -- all these problems are solved
400: in <a href=anoncvs.html>OpenBSD current</a> and the
401: <a href=stable.html>patch branch</a>.
402:
403: <p>
404: <ul>
1.385 jasper 405: <li><a href="errata45.html#016_openssl">April 14, 2010:
406: In TLS connections, certain incorrectly formatted records can
407: cause an OpenSSL client or server to crash due to a read
1.392 tobias 408: attempt at NULL.</a>
1.385 jasper 409: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 410: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 411: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 412: <li><a href="errata45.html#010_openssl">November 26, 2009:
413: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 414: related to renegotiation.</a>
1.373 djm 415: </ul>
416:
417: <li>
1.365 deraadt 418: <a name="44"></a>
419:
420: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
421: These are the OpenBSD 4.4 advisories -- all these problems are solved
422: in <a href=anoncvs.html>OpenBSD current</a> and the
423: <a href=stable.html>patch branch</a>.
424:
425: <p>
426: <ul>
1.372 millert 427: <li><a href="errata44.html#011_sudo">February 22, 2009:
428: sudo(8) may allow a user listed in sudoers to run a command
429: as a different user than their access rule specifies when a Unix
430: group is used in the RunAs portion of the rule.</a>
1.370 djm 431: <li><a href="errata44.html#008_bind">January 15, 2009:
432: named(8) suffered from a similar logic error that may allow
433: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 434: <li><a href="errata44.html#007_openssl">January 9, 2009:
435: OpenSSL suffered from some logic errors that allowed bypass
436: of DSA/ECDSA certificate validation.</a>
1.367 brad 437: <li><a href="errata44.html#001_ndp">November 2, 2008:
438: The Neighbor Discovery Protocol (ndp) did not correctly verify
439: neighbor solicitation requests maybe allowing a nearby attacker
440: to intercept traffic.</a>
1.365 deraadt 441: </ul>
442:
443: <li>
1.357 brad 444: <a name="43"></a>
445:
446: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
447: These are the OpenBSD 4.3 advisories -- all these problems are solved
448: in <a href=anoncvs.html>OpenBSD current</a> and the
449: <a href=stable.html>patch branch</a>.
450:
451: <p>
452: <ul>
1.372 millert 453: <li><a href="errata43.html#011_sudo">February 22, 2009:
454: sudo(8) may allow a user listed in sudoers to run a command
455: as a different user than their access rule specifies when a Unix
456: group is used in the RunAs portion of the rule.</a>
1.370 djm 457: <li><a href="errata43.html#008_bind">January 15, 2009:
458: named(8) suffered from a similar logic error that may allow
459: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 460: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 461: OpenSSL suffered from some logic errors that allowed bypass
462: of DSA/ECDSA certificate validation.</a>
1.382 tobias 463: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 464: The Neighbor Discovery Protocol (ndp) did not correctly verify
465: neighbor solicitation requests maybe allowing a nearby attacker
466: to intercept traffic.</a>
1.362 brad 467: <li><a href="errata43.html#004_bind">July 23, 2008:
468: A vulnerability has been found with BIND.</a>
1.361 brad 469: <li><a href="errata43.html#003_xorg">July 15, 2008:
470: Multiple vulnerabilities in X.Org.</a>
1.359 brad 471: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 472: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 473: <li><a href="errata43.html#001_openssh">March 30, 2008:
474: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 475: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 476: </ul>
477:
478: <li>
1.348 merdely 479: <a name="42"></a>
480: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
481: These are the OpenBSD 4.2 advisories -- all these problems are solved
482: in <a href=anoncvs.html>OpenBSD current</a> and the
483: <a href=stable.html>patch branch</a>.
484:
485: <p>
486: <ul>
1.364 tobias 487: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 488: The Neighbor Discovery Protocol (ndp) did not correctly verify
489: neighbor solicitation requests maybe allowing a nearby attacker
490: to intercept traffic.</a>
1.362 brad 491: <li><a href="errata42.html#013_bind">July 23, 2008:
492: A vulnerability has been found with BIND.</a>
1.361 brad 493: <li><a href="errata42.html#012_xorg2">July 15, 2008:
494: Multiple vulnerabilities in X.Org.</a>
1.359 brad 495: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 496: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 497: <li><a href="errata42.html#010_openssh">March 30, 2008:
498: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 499: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 500: <li><a href="errata42.html#009_ppp">March 7, 2008:
501: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 502: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
503: Multiple vulnerabilities in X.Org.</a>
1.351 okan 504: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
505: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 506: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 507: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 508: </ul>
509:
510: <li>
1.346 matthieu 511: <a name="41"></a>
512:
513: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
514: These are the OpenBSD 4.1 advisories -- all these problems are solved
515: in <a href=anoncvs.html>OpenBSD current</a> and the
516: <a href=stable.html>patch branch</a>.
517:
518: <p>
519: <ul>
1.359 brad 520: <li><a href="errata41.html#016_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="errata41.html#015_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>
1.356 henning 525: <li><a href="errata41.html#014_ppp">March 7, 2008:
526: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 527: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
528: Multiple vulnerabilities in X.Org.</a>
529: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
530: The SSL_get_shared_ciphers() function in OpenSSL contains
531: an off-by-one overflow.</a>
1.350 deraadt 532: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 533: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 534: <li><a href="errata41.html#009_file">Jul 9, 2007:
535: Fix possible heap overflow in file(1).</a>
1.346 matthieu 536: <li><a href="errata41.html#005_route6">Apr 27, 2007:
537: IPv6 type 0 route headers can be used to mount a DoS attack
538: against hosts and networks.</a>
539: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
540: Multiple vulnerabilities in X.Org.</a>
541: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
542: Incorrect mbuf handling for ICMP6 packets.</a>
543: </ul>
544:
545: <li>
1.334 brad 546: <a name="40"></a>
547: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
548: These are the OpenBSD 4.0 advisories -- all these problems are solved
549: in <a href=anoncvs.html>OpenBSD current</a> and the
550: <a href=stable.html>patch branch</a>.
551:
552: <p>
553: <ul>
1.382 tobias 554: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
555: The SSL_get_shared_ciphers() function in OpenSSL contains an
556: off-by-one overflow.</a>
1.350 deraadt 557: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 558: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 559: <li><a href="errata40.html#015_file">Jul 9, 2007:
560: Fix possible heap overflow in file(1).</a>
1.343 deraadt 561: <li><a href="errata40.html#012_route6">Apr 23, 2007:
562: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 563: against hosts and networks.</a>
1.342 mbalmer 564: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
565: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 566: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
567: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 568: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 569: Insufficient validation in vga(4) may allow an attacker to gain
570: root privileges on some i386 systems.</a>
1.339 deraadt 571: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 572: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 573: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 574: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
575: found by Chris Evans.</a>
1.339 deraadt 576: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 577: Several problems have been found in OpenSSL.</a>
1.339 deraadt 578: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 579: httpd(8) does not sanitize the Expect header from an HTTP request
580: when it is reflected back in an error message, which might allow
581: cross-site scripting (XSS) style attacks.</a>
582: </ul>
583:
584: <li>
1.321 brad 585: <a name="39"></a>
586:
587: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
588: These are the OpenBSD 3.9 advisories -- all these problems are solved
589: in <a href=anoncvs.html>OpenBSD current</a> and the
590: <a href=stable.html>patch branch</a>.
591:
592: <p>
593: <ul>
1.343 deraadt 594: <li><a href="errata39.html#022_route6">Apr 23, 2007:
595: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 596: against hosts and networks.</a>
1.342 mbalmer 597: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
598: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 599: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
600: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 601: <li><a href="errata39.html#agp">Jan 3, 2007:
602: Insufficient validation in vga(4) may allow an attacker to gain
603: root privileges on some i386 systems.</a>
1.336 brad 604: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 605: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 606: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 607: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 608: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 609: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 610: found by Chris Evans.</a>
1.333 deraadt 611: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 612: Several problems have been found in OpenSSL.</a>
1.333 deraadt 613: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 614: httpd(8) does not sanitize the Expect header from an HTTP request
615: when it is reflected back in an error message, which might allow
616: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 617: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 618: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
619: possible for an attacker to construct an invalid signature which
620: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 621: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 622: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 623: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 624: Due to the failure to correctly validate LCP configuration option
625: lengths, it is possible for an attacker to send LCP packets via an
626: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 627: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 628: A problem in isakmpd(8) caused IPsec to run partly without replay
629: protection.</a>
1.333 deraadt 630: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 631: It is possible to cause the kernel to panic when more than the default
632: number of sempahores have been allocated.</a>
1.333 deraadt 633: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 634: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
635: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
636: option.</a>
1.333 deraadt 637: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 638: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 639: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 640: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
641: overflow.</a>
1.333 deraadt 642: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 643: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 644: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 645: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 646: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 647: A race condition has been reported to exist in the handling by sendmail
648: of asynchronous signals.</a>
649: </ul>
650:
651: <li>
1.318 deraadt 652: <a name="38"></a>
653:
654: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
655: These are the OpenBSD 3.8 advisories -- all these problems are solved
656: in <a href=anoncvs.html>OpenBSD current</a> and the
657: <a href=stable.html>patch branch</a>.
658:
659: <p>
660: <ul>
1.332 brad 661: <li><a href="errata38.html#ssh2">Oct 12, 2006:
662: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 663: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 664: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 665: found by Chris Evans.</a>
666: <li><a href="errata38.html#openssl2">Oct 7, 2006:
667: Several problems have been found in OpenSSL.</a>
668: <li><a href="errata38.html#httpd2">Oct 7, 2006:
669: httpd(8) does not sanitize the Expect header from an HTTP request
670: when it is reflected back in an error message, which might allow
671: cross-site scripting (XSS) style attacks.</a>
1.329 brad 672: <li><a href="errata38.html#openssl">Sep 8, 2006:
673: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
674: possible for an attacker to construct an invalid signature which
675: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 676: <li><a href="errata38.html#bind">Sep 8, 2006:
677: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 678: <li><a href="errata38.html#sppp">Sep 2, 2006:
679: Due to the failure to correctly validate LCP configuration option
680: lengths, it is possible for an attacker to send LCP packets via an
681: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 682: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
683: A problem in isakmpd(8) caused IPsec to run partly without replay
684: protection.</a>
685: <li><a href="errata38.html#sem">Aug 25, 2006:
686: It is possible to cause the kernel to panic when more than the default
687: number of sempahores have been allocated.</a>
688: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
689: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
690: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
691: option.</a>
692: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
693: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 694: <li><a href="errata38.html#httpd">Jul 30, 2006:
695: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
696: overflow.</a>
1.324 brad 697: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
698: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 699: <li><a href="errata38.html#xorg">May 2, 2006:
700: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 701: <li><a href="errata38.html#sendmail">Mar 25, 2006:
702: A race condition has been reported to exist in the handling by sendmail
703: of asynchronous signals.</a>
704: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 705: Josh Bressers has reported a weakness in OpenSSH caused due to the
706: insecure use of the system(3) function in scp(1) when performing copy
707: operations using filenames that are supplied by the user from the
708: command line.</a>
1.321 brad 709: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 710: Do not allow users to trick suid programs into re-opening files via
711: /dev/fd.</a>
1.321 brad 712: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 713: A buffer overflow has been found in the Perl interpreter with the
714: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 715: </ul>
716:
717: <li>
1.312 david 718: <a name="37"></a>
719:
720: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
721: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 722: in <a href="anoncvs.html">OpenBSD current</a>. The
723: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
724: you should update your machine.
1.312 david 725:
726: <p>
727: <ul>
1.322 brad 728: <li><a href="errata37.html#xorg">May 2, 2006:
729: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 730: <li><a href="errata37.html#sendmail">Mar 25, 2006:
731: A race condition has been reported to exist in the handling by sendmail
732: of asynchronous signals.</a>
1.320 brad 733: <li><a href="errata37.html#ssh">Feb 12, 2006:
734: Josh Bressers has reported a weakness in OpenSSH caused due to the
735: insecure use of the system(3) function in scp(1) when performing copy
736: operations using filenames that are supplied by the user from the
737: command line.</a>
1.319 brad 738: <li><a href="errata37.html#fd">Jan 5, 2006:
739: Do not allow users to trick suid programs into re-opening files via
740: /dev/fd.</a>
741: <li><a href="errata37.html#perl">Jan 5, 2006:
742: A buffer overflow has been found in the Perl interpreter with the
743: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 744: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 745: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 746: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 747: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 748: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 749: Fix a race condition in sudo(8) that could allow a user
1.315 millert 750: to run arbitrary commands.</a>
1.318 deraadt 751: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 752: Fix a buffer overflow, memory leaks, and NULL pointer
753: dereference in cvs(1).</a>
1.312 david 754: </ul>
755:
756: <li>
1.301 miod 757: <a name="36"></a>
758:
759: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
760: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 761: in <a href="anoncvs.html">OpenBSD current</a>. The
762: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
763: you should update your machine.
1.301 miod 764:
765: <p>
1.302 markus 766: <ul>
1.317 millert 767: <li><a href="errata36.html#libz2">Jul 21, 2005:
768: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 769: <li><a href="errata36.html#libz">Jul 6, 2005:
770: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 771: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 772: Fix a race condition in sudo(8) that could allow a user
1.315 millert 773: to run arbitrary commands.</a>
1.311 deraadt 774: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 775: Fix a buffer overflow, memory leaks, and NULL pointer
776: dereference in cvs(1).</a>
1.311 deraadt 777: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 778: Due to buffer overflows in telnet(1), a malicious
779: server or man-in-the-middle attack could allow
780: execution of arbitrary code with the privileges of
781: the user invoking telnet(1).</a>
1.311 deraadt 782: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 783: More stringent checking should be done in the copy(9)
784: functions to prevent their misuse.</a>
1.311 deraadt 785: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 786: More stringent checking should be done in the copy(9)
787: functions to prevent their misuse.</a>
1.311 deraadt 788: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 789: httpd(8)'s mod_include module fails to properly validate
790: the length of user supplied tag strings prior to copying
1.305 brad 791: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 792: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 793: On systems running isakmpd(8) it is possible for a local
794: user to cause kernel memory corruption and system panic by
1.303 markus 795: setting ipsec(4) credentials on a socket.</a>
1.302 markus 796: </ul>
1.301 miod 797:
798: <li>
1.288 matthieu 799: <a name="35"></a>
1.279 deraadt 800:
1.294 david 801: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 802: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 803: in <a href="anoncvs.html">OpenBSD current</a>. The
804: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
805: you should update your machine.
1.279 deraadt 806:
807: <p>
808: <ul>
1.310 brad 809: <li><a href="errata35.html#cvs4">Apr 28, 2005:
810: Fix a buffer overflow, memory leaks, and NULL pointer
811: dereference in cvs(1).</a>
1.309 brad 812: <li><a href="errata35.html#telnet">Mar 30, 2005:
813: Due to buffer overflows in telnet(1), a malicious
814: server or man-in-the-middle attack could allow
815: execution of arbitrary code with the privileges of
816: the user invoking telnet(1).</a>
1.308 brad 817: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 818: More stringent checking should be done in the copy(9)
819: functions to prevent their misuse.</a>
1.306 brad 820: <li><a href="errata35.html#locore">Feb 28, 2005:
821: More stringent checking should be done in the copy(9)
822: functions to prevent their misuse.</a>
1.304 brad 823: <li><a href="errata35.html#httpd3">Jan 12, 2005:
824: httpd(8)'s mod_include module fails to properly validate
825: the length of user supplied tag strings prior to copying
1.305 brad 826: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 827: <li><a href="errata35.html#pfkey">Dec 14, 2004:
828: On systems running isakmpd(8) it is possible for a local
829: user to cause kernel memory corruption and system panic by
1.303 markus 830: setting ipsec(4) credentials on a socket.</a>
1.301 miod 831: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 832: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 833: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 834: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 835: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 836: httpd(8)'s mod_rewrite module can be made to write one zero byte in
837: an arbitrary memory position outside of a char array, causing a DoS
838: or possibly buffer overflows.</a>
1.301 miod 839: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 840: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 841: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 842: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 843: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 844: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 845: Multiple remote vulnerabilities have been found in the cvs(1)
846: server which can be used by CVS clients to crash or execute
1.293 brad 847: arbitrary code on the server.</a>
1.301 miod 848: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 849: kdc(8) performs inadequate checking of request fields, leading
850: to the possibility of principal impersonation from other
851: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 852: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 853: xdm(1) ignores the requestPort resource and creates a
1.293 brad 854: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 855: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 856: A buffer overflow in the cvs(1) server has been found,
857: which can be used by CVS clients to execute arbitrary code on
1.293 brad 858: the server.</a>
1.301 miod 859: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 860: Integer overflow problems were found in procfs, allowing
1.293 brad 861: reading of arbitrary kernel memory.</a>
1.301 miod 862: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 863: Pathname validation problems have been found in cvs(1),
864: allowing clients and servers access to files outside the
1.293 brad 865: repository or local CVS tree.</a>
1.279 deraadt 866: </ul>
867:
868: <p>
869: <li>
1.288 matthieu 870: <a name="34"></a>
1.261 david 871:
1.294 david 872: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 873: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 874: in <a href="anoncvs.html">OpenBSD current</a>. The
875: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
876: you should update your machine.
1.261 david 877: <p>
878: <ul>
1.302 markus 879: <li><a href="errata34.html#pfkey">Dec 14, 2004:
880: On systems running isakmpd(8) it is possible for a local
881: user to cause kernel memory corruption and system panic by
1.303 markus 882: setting ipsec(4) credentials on a socket.</a>
1.298 brad 883: <li><a href="errata34.html#xpm">Sep 16, 2004:
884: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 885: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
886: httpd(8)'s mod_rewrite module can be made to write one zero byte in
887: an arbitrary memory position outside of a char array, causing a DoS
888: or possibly buffer overflows.</a>
1.294 david 889: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 890: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 891: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 892: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 893: an attacker can delete IPsec tunnels at will.</a>
1.294 david 894: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 895: Multiple remote vulnerabilities have been found in the cvs(1)
896: server which can be used by CVS clients to crash or execute
1.293 brad 897: arbitrary code on the server.</a>
1.294 david 898: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 899: kdc(8) performs inadequate checking of request fields, leading
900: to the possibility of principal impersonation from other
901: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 902: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 903: A buffer overflow in the cvs(1) server has been found,
904: which can be used by CVS clients to execute arbitrary code on
905: the server.</a>
1.294 david 906: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 907: Integer overflow problems were found in procfs, allowing
908: reading of arbitrary kernel memory.</a>
1.294 david 909: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 910: Pathname validation problems have been found in cvs(1),
911: allowing clients and servers access to files outside the
912: repository or local CVS tree.</a>
1.294 david 913: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 914: A missing check for a NULL-pointer dereference may allow a
1.281 otto 915: remote attacker to crash applications using OpenSSL.</a>
1.294 david 916: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 917: Defects in the payload validation and processing functions of
918: isakmpd have been discovered. An attacker could send malformed
919: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 920: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 921: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
922: access module, using IP addresses without a netmask on big endian
923: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 924: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 925: An IPv6 MTU handling problem exists that could be used by an
926: attacker to cause a denial of service attack.</a>
1.294 david 927: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 928: A reference counting bug in shmat(2) could be used to write to
929: kernel memory under certain circumstances.</a>
1.294 david 930: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 931: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 932: by Thomas Walpuski.</a>
1.294 david 933: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 934: It may be possible for a local user to overrun the stack in
935: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 936: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 937: The use of certain ASN.1 encodings or malformed public keys may
938: allow an attacker to mount a denial of service attack against
939: applications linked with ssl(3).</a>
1.261 david 940: </ul>
941:
942: <li>
1.288 matthieu 943: <a name="33"></a>
1.246 deraadt 944:
1.294 david 945: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 946: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 947: in <a href="anoncvs.html">OpenBSD current</a>. The
948: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 949: you should update your machine.
1.246 deraadt 950: <p>
951: <ul>
1.294 david 952: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 953: Pathname validation problems have been found in cvs(1),
954: allowing clients and servers access to files outside the
955: repository or local CVS tree.</a>
1.294 david 956: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 957: A missing check for a NULL-pointer dereference may allow a
1.281 otto 958: remote attacker to crash applications using OpenSSL.</a>
1.294 david 959: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 960: Defects in the payload validation and processing functions of
961: isakmpd have been discovered. An attacker could send malformed
962: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 963: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 964: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
965: access module, using IP addresses without a netmask on big endian
966: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 967: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 968: An IPv6 MTU handling problem exists that could be used by an
969: attacker to cause a denial of service attack.</a>
1.294 david 970: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 971: A reference counting bug in shmat(2) could be used to write to
972: kernel memory under certain circumstances.</a>
1.294 david 973: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 974: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 975: by Thomas Walpuski.</a>
1.294 david 976: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 977: It may be possible for a local user to execute arbitrary code
978: resulting in escalation of privileges due to a stack overrun
979: in compat_ibcs2(8).</a>
1.294 david 980: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 981: The use of certain ASN.1 encodings or malformed public keys may
982: allow an attacker to mount a denial of service attack against
983: applications linked with ssl(3).</a>
1.294 david 984: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 985: Access of freed memory in pf(4) could be used to
1.260 margarid 986: remotely panic a machine using scrub rules.</a>
1.294 david 987: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 988: A buffer overflow in the address parsing in
989: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 990: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 991: OpenSSH versions prior to 3.7 contains a buffer management error
992: that is potentially exploitable.</a>
1.294 david 993: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 994: Root may be able to reduce the security level by taking advantage of
995: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 996: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 997: An improper bounds check in the kernel may allow a local user
998: to panic the kernel.</a>
1.294 david 999: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 1000: An off-by-one error exists in the C library function realpath(3)
1001: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 1002: </ul>
1003:
1.265 miod 1004:
1.247 david 1005: <p>
1.246 deraadt 1006: <li>
1.288 matthieu 1007: <a name="32"></a>
1.224 deraadt 1008:
1.294 david 1009: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 1010: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 1011: in <a href="anoncvs.html">OpenBSD current</a>. The
1012: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 1013: you should update your machine.
1.224 deraadt 1014: <p>
1015: <ul>
1.294 david 1016: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 1017: The use of certain ASN.1 encodings or malformed public keys may
1018: allow an attacker to mount a denial of service attack against
1019: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 1020: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 1021: Access of freed memory in pf(4) could be used to
1.260 margarid 1022: remotely panic a machine using scrub rules.</a>
1.294 david 1023: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 1024: A buffer overflow in the address parsing in
1025: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1026: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 1027: OpenSSH versions prior to 3.7 contains a buffer management error
1028: that is potentially exploitable.</a>
1.294 david 1029: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 1030: Fix for a potential security issue in
1031: sendmail(8) with respect to DNS maps.</a>
1.294 david 1032: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1033: An off-by-one error exists in the C library function realpath(3)
1034: may allow an attacker to gain escalated privileges.</a>
1.294 david 1035: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1036: A buffer overflow in the address parsing in
1037: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1038: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1039: A cryptographic weaknesses in the Kerberos v4 protocol can be
1040: exploited on Kerberos v5 as well.</a>
1.294 david 1041: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1042: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1043: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1044: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1045: Various SSL and TLS operations in OpenSSL are vulnerable to
1046: timing attacks.</a>
1.294 david 1047: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1048: A buffer overflow in lprm(1) may allow an attacker to elevate
1.392 tobias 1049: privileges to user daemon.</a>
1.294 david 1050: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1051: A buffer overflow in the envelope comments processing in
1052: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1053: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1054: httpd(8) leaks file inode numbers via ETag header as well as
1055: child PIDs in multipart MIME boundary generation. This could
1056: lead, for example, to NFS exploitation because it uses inode
1057: numbers as part of the file handle.</a>
1.294 david 1058: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1059: In ssl(8) an information leak can occur via timing by performing
1060: a MAC computation even if incorrect block cipher padding has
1061: been found, this is a countermeasure. Also, check for negative
1062: sizes, in allocation routines.</a>
1.294 david 1063: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1064: A double free exists in cvs(1) that could lead to privilege
1065: escalation for cvs configurations where the cvs command is
1.233 margarid 1066: run as a privileged user.</a>
1.294 david 1067: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1068: A buffer overflow exists in named(8) that could lead to a
1069: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1070: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1071: A logic error in the pool kernel memory allocator could cause
1072: memory corruption in low-memory situations, causing the system
1073: to crash.</a>
1.294 david 1074: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1075: An attacker can bypass smrsh(8)'s restrictions and execute
1076: arbitrary commands with the privileges of his own account.</a>
1.294 david 1077: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1078: Network bridges running pf with scrubbing enabled could cause
1079: mbuf corruption, causing the system to crash.</a>
1.294 david 1080: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1081: A buffer overflow can occur in the kadmind(8) daemon, leading
1082: to possible remote crash or exploit.</a>
1.224 deraadt 1083: </ul>
1084:
1.227 miod 1085: <p>
1086: <li>
1.288 matthieu 1087: <a name="31"></a>
1.203 deraadt 1088:
1.294 david 1089: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1090: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1091: in <a href="anoncvs.html">OpenBSD current</a>. The
1092: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1093: you should update your machine.
1.203 deraadt 1094:
1095: <p>
1096: <ul>
1.294 david 1097: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1098: A buffer overflow in the address parsing in
1099: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1100: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1101: A cryptographic weaknesses in the Kerberos v4 protocol can be
1102: exploited on Kerberos v5 as well.</a>
1.294 david 1103: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1104: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1105: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1106: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1107: Various SSL and TLS operations in OpenSSL are vulnerable to
1108: timing attacks.</a>
1.294 david 1109: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1110: A buffer overflow in lprm(1) may allow an attacker to gain
1111: root privileges.</a>
1.294 david 1112: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1113: A buffer overflow in the envelope comments processing in
1114: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1115: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1116: In ssl(8) an information leak can occur via timing by performing
1117: a MAC computation even if incorrect block cipher padding has
1118: been found, this is a countermeasure. Also, check for negative
1119: sizes, in allocation routines.</a>
1.294 david 1120: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1121: A double free exists in cvs(1) that could lead to privilege
1122: escalation for cvs configurations where the cvs command is
1.392 tobias 1123: run as a privileged user.</a>
1.294 david 1124: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1125: A buffer overflow exists in named(8) that could lead to a
1126: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1127: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1128: Incorrect argument checking in the getitimer(2) system call
1129: may allow an attacker to crash the system.</a>
1.294 david 1130: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1131: An attacker can bypass smrsh(8)'s restrictions and execute
1132: arbitrary commands with the privileges of his own account.</a>
1.294 david 1133: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1134: A buffer overflow can occur in the kadmind(8) daemon, leading
1135: to possible remote crash or exploit.</a>
1.294 david 1136: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1137: Incorrect argument checking in the setitimer(2) system call
1138: may allow an attacker to write to kernel memory.</a>
1.294 david 1139: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1140: An insufficient boundary check in the select system call
1.220 miod 1141: allows an attacker to overwrite kernel memory and execute arbitrary code
1142: in kernel context.</a>
1.294 david 1143: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1144: Several remote buffer overflows can occur in the SSL2 server and SSL3
1145: client of the ssl(8) library, as in the ASN.1 parser code in the
1146: crypto(3) library, all of them being potentially remotely
1147: exploitable.</a>
1.294 david 1148: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1149: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1150: possible remote crash.</a>
1.294 david 1151: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1152: A race condition exists in the pppd(8) daemon which may cause it to
1153: alter the file permissions of an arbitrary file.</a>
1.294 david 1154: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1155: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1156: crash.</a>
1.294 david 1157: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1158: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1159: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1160: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1161: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1162: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1163: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1164: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1165: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1166: input validation error that can result in an integer overflow and
1167: privilege escalation.</a>
1.294 david 1168: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1169: A buffer overflow can occur during the interpretation of chunked
1170: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1171: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1172: Under certain conditions, on systems using YP with netgroups
1173: in the password database, it is possible that sshd(8) does
1174: ACL checks for the requested user name but uses the password
1175: database entry of a different user for authentication. This
1176: means that denied users might authenticate successfully
1177: while permitted users could be locked out.</a>
1.294 david 1178: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1179: A race condition exists that could defeat the kernel's
1180: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1181: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1182: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1183: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1184: A local user can gain super-user privileges due to a buffer
1185: overflow in sshd(8) if AFS has been configured on the system
1186: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1187: in the sshd_config file.</a>
1.203 deraadt 1188: </ul>
1189:
1.235 miod 1190: <p>
1.203 deraadt 1191: <li>
1.288 matthieu 1192: <a name="30"></a>
1.187 deraadt 1193:
1.294 david 1194: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1195: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1196: in <a href="anoncvs.html">OpenBSD current</a>. The
1197: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1198: you should update your machine.
1.187 deraadt 1199:
1200: <p>
1201: <ul>
1.294 david 1202: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1203: A buffer overflow exists in named(8) that could lead to a
1204: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1205: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1206: Incorrect argument checking in the getitimer(2) system call
1207: may allow an attacker to crash the system.</a>
1.294 david 1208: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1209: An attacker can bypass smrsh(8)'s restrictions and execute
1210: arbitrary commands with the privileges of his own account.</a>
1.294 david 1211: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1212: A buffer overflow can occur in the kadmind(8) daemon, leading
1213: to possible remote crash or exploit.</a>
1.294 david 1214: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1215: Incorrect argument checking in the setitimer(2) system call
1216: may allow an attacker to write to kernel memory.</a>
1.294 david 1217: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1218: An insufficient boundary check in the select and poll system calls
1219: allows an attacker to overwrite kernel memory and execute arbitrary code
1220: in kernel context.</a>
1.294 david 1221: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1222: Several remote buffer overflows can occur in the SSL2 server and SSL3
1223: client of the ssl(8) library, as in the ASN.1 parser code in the
1224: crypto(3) library, all of them being potentially remotely
1225: exploitable.</a>
1.294 david 1226: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1227: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1228: possible remote crash.</a>
1.294 david 1229: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1230: A race condition exists in the pppd(8) daemon which may cause it to
1231: alter the file permissions of an arbitrary file.</a>
1.294 david 1232: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1233: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1234: crash.</a>
1.294 david 1235: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1236: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1237: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1238: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1239: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1240: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1241: input validation error that can result in an integer overflow and
1242: privilege escalation.</a>
1.294 david 1243: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1244: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1245: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1246: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1247: A buffer overflow can occur during the interpretation of chunked
1248: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1249: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1250: A race condition exists that could defeat the kernel's
1251: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1252: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1253: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1254: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1255: A local user can gain super-user privileges due to a buffer
1256: overflow in sshd(8) if AFS has been configured on the system
1257: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1258: in the sshd_config file.</a>
1.294 david 1259: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1260: The mail(1) was interpreting tilde escapes even when invoked
1261: in non-interactive mode. As mail(1) is called as root from cron,
1262: this can lead to a local root compromise.</a>
1.294 david 1263: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1264: Under certain conditions, on systems using YP with netgroups in
1265: the password database, it is possible for the rexecd(8) and rshd(8)
1266: daemons to execute a shell from a password database entry for a
1267: different user. Similarly, atrun(8) may change to the wrong
1268: home directory when running jobs.</a>
1.294 david 1269: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1270: A potential double free() exists in the zlib library;
1271: this is not exploitable on OpenBSD.
1272: The kernel also contains a copy of zlib; it is not
1273: currently known if the kernel zlib is exploitable.</a>
1.294 david 1274: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1275: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1276: may allow a local user to gain super-user privileges.</a>
1.294 david 1277: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1278: A race condition between the ptrace(2) and execve(2) system calls
1279: allows an attacker to modify the memory contents of suid/sgid
1280: processes which could lead to compromise of the super-user account.</a>
1.294 david 1281: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1282: There is a security hole in sudo(8) that can be exploited
1283: when the Postfix sendmail replacement is installed that may
1284: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1285: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1286: An attacker can trick a machine running the lpd daemon into
1287: creating new files in the root directory from a machine with
1288: remote line printer access.</a>
1.294 david 1289: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1290: The vi.recover script can be abused in such a way as
1291: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1292: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1293: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1294: resulting in a crash.</a>
1.294 david 1295: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1296: A security hole that may allow an attacker to partially authenticate
1297: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1298: </ul>
1299:
1300: <p>
1301: <li>
1.288 matthieu 1302: <a name="29"></a>
1.173 deraadt 1303:
1.294 david 1304: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1305: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1306: in <a href="anoncvs.html">OpenBSD current</a>. The
1307: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1308: you should update your machine.
1309:
1.173 deraadt 1310:
1311: <p>
1312: <ul>
1.294 david 1313: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1314: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1315: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1316: A race condition exists that could defeat the kernel's
1317: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1318: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1319: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1320: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1321: A local user can gain super-user privileges due to a buffer
1322: overflow in sshd(8) if AFS has been configured on the system
1323: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1324: in the sshd_config file.</a>
1.294 david 1325: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1326: The mail(1) was interpreting tilde escapes even when invoked
1327: in non-interactive mode. As mail(1) is called as root from cron,
1328: this can lead to a local root compromise.</a>
1.294 david 1329: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1330: A potential double free() exists in the zlib library;
1331: this is not exploitable on OpenBSD.
1332: The kernel also contains a copy of zlib; it is not
1333: currently known if the kernel zlib is exploitable.</a>
1.294 david 1334: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1335: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1336: may allow a local user to gain super-user privileges.</a>
1.294 david 1337: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1338: A race condition between the ptrace(2) and execve(2) system calls
1339: allows an attacker to modify the memory contents of suid/sgid
1340: processes which could lead to compromise of the super-user account.</a>
1.294 david 1341: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1342: There is a security hole in sudo(8) that can be exploited
1343: when the Postfix sendmail replacement is installed that may
1344: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1345: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1346: An attacker can trick a machine running the lpd daemon into
1347: creating new files in the root directory from a machine with
1348: remote line printer access.</a>
1.294 david 1349: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1350: The vi.recover script can be abused in such a way as
1351: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1352: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1353: A security hole exists in uuxqt(8) that may allow an
1354: attacker to gain root privileges.</a>
1.294 david 1355: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1356: A security hole exists in lpd(8) that may allow an
1357: attacker to gain root privileges if lpd is running.</a>
1.294 david 1358: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1359: A security hole exists in sendmail(8) that may allow an
1360: attacker on the local host to gain root privileges.</a>
1.294 david 1361: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1362: A kernel buffer overflow in the NFS code can be used to execute
1363: arbitrary code by users with mount privileges (only root by
1.181 millert 1364: default).</a>
1.294 david 1365: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1366: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1367: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1368: sshd(8) allows users to delete arbitrary files named "cookies"
1369: if X11 forwarding is enabled. X11 forwarding is disabled
1370: by default.</a>
1.294 david 1371: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1372: Programs using the fts routines can be tricked into changing
1373: into the wrong directory.</a>
1.294 david 1374: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1375: Sendmail signal handlers contain unsafe code,
1376: leading to numerous race conditions.</a>
1.173 deraadt 1377: </ul>
1378:
1379: <p>
1380: <li>
1.288 matthieu 1381: <a name="28"></a>
1.152 deraadt 1382:
1.294 david 1383: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1384: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1385: in <a href="anoncvs.html">OpenBSD current</a>. The
1386: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1387: you should update your machine.
1388:
1.152 deraadt 1389:
1390: <p>
1391: <ul>
1.294 david 1392: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1393: A security hole exists in uuxqt(8) that may allow an
1394: attacker to gain root privileges.</a>
1.294 david 1395: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1396: A security hole exists in lpd(8) that may allow an
1397: attacker to gain root privileges if lpd is running.</a>
1.294 david 1398: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1399: A security hole exists in sendmail(8) that may allow an
1400: attacker on the local host to gain root privileges.</a>
1.294 david 1401: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1402: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1403: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1404: Programs using the fts routines can be tricked into changing
1405: into the wrong directory.</a>
1.294 david 1406: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1407: Sendmail signal handlers contain unsafe code,
1408: leading to numerous race conditions.</a>
1.294 david 1409: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1410: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1411: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1412: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1413: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1414: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1415: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1416: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1417: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1418: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1419: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1420: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1421: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1422: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1423: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1424: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1425: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1426: rnd(4) did not use all of its input when written to.</a>
1.294 david 1427: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1428: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1429: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1430: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1431: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1432: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1433: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1434: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1435: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1436: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1437: </ul>
1438:
1439: <p>
1440: <li>
1.288 matthieu 1441: <a name="27"></a>
1.124 deraadt 1442:
1.294 david 1443: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1444: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1445: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1446: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1447:
1448: <p>
1449: <ul>
1.294 david 1450: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1451: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1452: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1453: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1454: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1455: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1456: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1457: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1458: (patch included)</a>
1.294 david 1459: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1460: X11 libraries have 2 potential overflows in xtrans code.
1461: (patch included)</a>
1.294 david 1462: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1463: Apache mod_rewrite and mod_vhost_alias modules could expose files
1464: on the server in certain configurations if used.
1465: (patch included)</a>
1.294 david 1466: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1467: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1468: TERMPATH and TERMCAP environment variables as it should.
1469: (patch included)</a>
1.294 david 1470: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1471: There are printf-style format string bugs in several privileged
1472: programs. (patch included)</a>
1.294 david 1473: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1474: libcurses honored terminal descriptions in the $HOME/.terminfo
1475: directory as well as in the TERMCAP environment variable for
1476: setuid and setgid applications.
1.146 deraadt 1477: (patch included)</a>
1.294 david 1478: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1479: A format string vulnerability exists in talkd(8).
1480: (patch included)</a>
1.294 david 1481: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1482: A format string vulnerability exists in the pw_error() function of the
1483: libutil library, yielding localhost root through chpass(1).
1484: (patch included)</a>
1.294 david 1485: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1486: Bad ESP/AH packets could cause a crash under certain conditions.
1487: (patch included)</a>
1.294 david 1488: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1489: A format string vulnerability (localhost root) exists in xlock(1).
1490: (patch included)</a>
1.294 david 1491: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1492: Various bugs found in X11 libraries have various side effects, almost
1493: completely denial of service in OpenBSD.
1494: (patch included)</a>
1.294 david 1495: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1496: Just like pretty much all the other unix ftp daemons
1497: on the planet, ftpd had a remote root hole in it.
1498: Luckily, ftpd was not enabled by default.
1.137 deraadt 1499: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1500: (patch included)</a>
1.294 david 1501: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1502: Mopd, very rarely used, contained some buffer overflows.
1503: (patch included)</a>
1.294 david 1504: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1505: libedit would check for a <b>.editrc</b> file in the current
1506: directory. Not known to be a real security issue, but a patch
1507: is available anyways.
1508: (patch included)</a>
1.294 david 1509: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1510: A serious bug in dhclient(8) could allow strings from a
1511: malicious dhcp server to be executed in the shell as root.
1512: (patch included)</a>
1.294 david 1513: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1514: A serious bug in isakmpd(8) policy handling wherein
1515: policy verification could be completely bypassed in isakmpd.
1516: (patch included)</a>
1.294 david 1517: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1518: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1519: should not be used, and results in security problems on
1520: other operating systems.</a>
1.294 david 1521: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1522: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1523: (patch included)</a>
1.294 david 1524: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1525: Improper use of ipf <i>keep-state</i> rules can result
1526: in firewall rules being bypassed. (patch included)</a>
1527:
1.124 deraadt 1528: </ul>
1529:
1530: <p>
1531: <li>
1.288 matthieu 1532: <a name="26"></a>
1.119 deraadt 1533:
1.294 david 1534: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1535: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1536: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1537: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1538:
1539: <p>
1540: <ul>
1.294 david 1541: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1542: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1543: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1544: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1545: Improper use of ipf <i>keep-state</i> rules can result
1546: in firewall rules being bypassed. (patch included)</a>
1.294 david 1547: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1548: xlockmore has a bug which a localhost attacker can use to gain
1549: access to the encrypted root password hash (which is normally
1.245 miod 1550: encoded using blowfish</a> (see
1.294 david 1551: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1552: crypt(3)</a>)
1.245 miod 1553: (patch included).
1.294 david 1554: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1555: Systems running with procfs enabled and mounted are
1556: vulnerable to a very tricky exploit. procfs is not
1557: mounted by default.
1558: (patch included).</a>
1.294 david 1559: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1560: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1561: thus exposing the system to a race where the aliases file
1562: did not exist.
1.119 deraadt 1563: (patch included).</a>
1.294 david 1564: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1565: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1566: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1567: A buffer overflow in the RSAREF code included in the
1568: USA version of libssl, is possibly exploitable in
1569: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1570: (patch included).<br></a>
1571: <strong>Update:</strong> Turns out that this was not exploitable
1572: in any of the software included in OpenBSD 2.6.
1.294 david 1573: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1574: Any user could change interface media configurations, resulting in
1575: a localhost denial of service attack.
1.121 deraadt 1576: (patch included).</a>
1.119 deraadt 1577: </ul>
1578:
1579: <p>
1580: <li>
1.288 matthieu 1581: <a name="25"></a>
1.106 deraadt 1582:
1.294 david 1583: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1584: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1585: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1586: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1587:
1.96 deraadt 1588: <p>
1.104 deraadt 1589: <ul>
1.294 david 1590: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1591: In cron(8), make sure argv[] is NULL terminated in the
1592: fake popen() and run sendmail as the user, not as root.
1593: (patch included).</a>
1.294 david 1594: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1595: filesystems had an overrun in their handling of uio_offset
1596: in their readdir() routines. (These filesystems are not
1597: enabled by default). (patch included).</a>
1.294 david 1598: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1599: when we execve() a new process. (patch included).</a>
1.294 david 1600: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1601: been handled by IPsec may be transmitted as cleartext.
1602: PF_KEY SA expirations may leak kernel resources.
1603: (patch included).</a>
1.294 david 1604: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1605: motd re-writing and change the find(1) to use -execdir
1606: (patch included).</a>
1.294 david 1607: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1608: users to chflags(2) or fchflags(2) on character or block devices
1609: which they may currently be the owner of (patch included).</a>
1.294 david 1610: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1611: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1612: </ul>
1613:
1.106 deraadt 1614: <p>
1615: <li>
1.288 matthieu 1616: <a name="24"></a>
1.235 miod 1617:
1.294 david 1618: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1619: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1620: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1621: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1622:
1.96 deraadt 1623: <p>
1.75 deraadt 1624: <ul>
1.294 david 1625: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1626: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1627: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1628: another kernel crash case caused by the <strong>crashme</strong>
1629: program (patch included).</a>
1.294 david 1630: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1631: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1632: (patch included).</a>
1.294 david 1633: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1634: existed in ping(8). (patch included).</a>
1.294 david 1635: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1636: the ipq, which could permit an attacker to cause a crash.
1637: (patch included).</a>
1.294 david 1638: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1639: kernel between accept(2) and select(2) could permit an attacker
1640: to hang sockets from remote.
1641: (patch included).</a>
1.294 david 1642: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1643: bog the machine excessively and cause problems.
1644: (patch included).</a>
1.294 david 1645: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1646: DDB interacted to possibly cause a crash.
1647: (patch included).</a>
1.294 david 1648: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1649: (patch included).</a>
1.294 david 1650: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1651: problem in bootpd(8). (patch included).</a>
1.294 david 1652: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1653: exploitable problem relating to environment variables in termcap
1654: and curses. (patch included).</a>
1.294 david 1655: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1656: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1657: </ul>
1658:
1.106 deraadt 1659: <p>
1660: <li>
1.288 matthieu 1661: <a name="23"></a>
1.235 miod 1662:
1.294 david 1663: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1664: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1665: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1666: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1667:
1.96 deraadt 1668: <p>
1.53 matthieu 1669: <ul>
1.294 david 1670: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1671: problem in bootpd(8). (patch included).</a>
1.294 david 1672: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1673: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1674: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1675: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1676: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1677: chpass(1) has a file descriptor leak which allows an
1678: attacker to modify /etc/master.passwd.</a>
1.294 david 1679: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1680: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1681: should not be executed with fd slots 0, 1, or 2 free.
1682: (patch included).</a>
1.294 david 1683: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1684: libraries (patches included).</a>
1.294 david 1685: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1686: processes too permissive (4th revision patch included).</a>
1.294 david 1687: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1688: of immutable and append-only file flags. (patch included).</a>
1.294 david 1689: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1690: if IPSEC is enabled (patch included).</a>
1.294 david 1691: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1692: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1693: </ul>
1.9 deraadt 1694:
1.106 deraadt 1695: <p>
1696: <li>
1.288 matthieu 1697: <a name="22"></a>
1.235 miod 1698:
1.294 david 1699: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1700: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1701: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1702: still exist in other operating systems. (The supplied patches are for
1703: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1704:
1.96 deraadt 1705: <p>
1.9 deraadt 1706: <ul>
1.294 david 1707: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1708: packets if IPSEC is enabled (patch included).</a>
1.294 david 1709: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1710: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1711: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1712: (patch included).</a>
1.294 david 1713: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1714: (patch included).</a>
1.294 david 1715: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1716: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1717: (patch included).</a>
1.294 david 1718: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1719: export (patch included).</a>
1.112 philen 1720: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1721: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1722: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1723: Acceptance.</a>
1.294 david 1724: A patch is available <a href="errata22.html#sourceroute">here</a>.
1725: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1726: flaw (patch included).</a>
1.294 david 1727: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1728: </ul>
1729:
1.106 deraadt 1730: <p>
1731: <li>
1.288 matthieu 1732: <a name="21"></a>
1.235 miod 1733:
1.294 david 1734: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1735: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1736: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1737: exist in other operating systems. (If you are running OpenBSD 2.1, we
1738: would strongly recommend an upgrade to the newest release, as this
1739: patch list only attempts at fixing the most important security
1740: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1741: security problems. Many of those problems were solved in ways which
1742: make it hard for us to provide patches).
1743:
1.96 deraadt 1744: <p>
1.52 deraadt 1745: <ul>
1.112 philen 1746: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1747: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1748: (patch included)</a>
1.112 philen 1749: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1750: </ul>
1.51 deraadt 1751:
1.106 deraadt 1752: <p>
1753: <li>
1.288 matthieu 1754: <a name="20"></a>
1.235 miod 1755:
1.294 david 1756: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1757: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1758: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1759: exist in other operating systems. (If you are running OpenBSD 2.0, we
1760: commend you for being there back in the old days!, but you're really
1761: missing out if you don't install a new version!)
1762:
1763: <p>
1764: <ul>
1.112 philen 1765: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1766: resolver (patch included)</a>
1767: <li>Many others... if people can hunt them down, please let me know
1768: and we'll put them up here.
1769: </ul>
1.51 deraadt 1770: <p>
1.106 deraadt 1771:
1.288 matthieu 1772: <a name="watching"></a>
1.294 david 1773: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1774:
1.21 deraadt 1775: Since we take a proactive stance with security, we are continually
1776: finding and fixing new security problems. Not all of these problems
1.80 espie 1777: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1778: confirmed to be exploitable; many simple bugs we fix do turn out to
1779: have security consequences we could not predict. We do not have the
1780: time resources to make these changes available in the above format.<p>
1.21 deraadt 1781:
1782: Thus there are usually minor security fixes in the current source code
1783: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1784: guarantee that these problems are of minimal impact and unproven
1.44 ian 1785: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1786: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1787:
1.45 deraadt 1788: People who are really concerned with security can do a number of
1789: things:<p>
1.21 deraadt 1790:
1791: <ul>
1792: <li>If you understand security issues, watch our
1.294 david 1793: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1794: eye out for things which appear security related. Since
1.21 deraadt 1795: exploitability is not proven for many of the fixes we make,
1796: do not expect the relevant commit message to say "SECURITY FIX!".
1797: If a problem is proven and serious, a patch will be available
1798: here very shortly after.
1.161 horacio 1799: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1800: security-announce mailing list</a> which will notify you for every
1.186 ian 1801: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1802: and instruct you on how to patch the problem.
1.21 deraadt 1803: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1804: complete system build from time to time (read /usr/src/Makefile
1805: carefully). Users can make the assumption that the current
1806: source tree always has stronger security than the previous release.
1.45 deraadt 1807: However, building your own system from source code is not trivial;
1.265 miod 1808: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1809: transition between major releases.
1.115 ericj 1810: <li>Install a binary snapshot for your
1.80 espie 1811: architecture, which are made available fairly often. For
1.29 deraadt 1812: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1813: </ul>
1814:
1.9 deraadt 1815: <p>
1.288 matthieu 1816: <a name="reporting"></a>
1.294 david 1817: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1818:
1.5 deraadt 1819: <p> If you find a new security problem, you can mail it to
1.294 david 1820: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1821: <br>
1.5 deraadt 1822: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1823: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1824:
1.107 deraadt 1825: <p>
1.288 matthieu 1826: <a name="papers"></a>
1.294 david 1827: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1828:
1.389 lum 1829: Numerous
1830: <a href="papers/">papers</a> have been written by OpenBSD team members,
1831: many dedicated to security.
1.294 david 1832: </ul>
1.106 deraadt 1833:
1.2 deraadt 1834: <hr>
1.294 david 1835: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1836: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1837: <br>
1.393 ! sthen 1838: <small>$OpenBSD: security.html,v 1.392 2012/05/01 17:56:54 tobias Exp $</small>
1.1 deraadt 1839:
1.24 deraadt 1840: </body>
1841: </html>
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