Annotation of www/security.html, Revision 1.388
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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>,
73: <a href="#49">4.9</a>.
1.388 ! miod 74: <a href="#50">5.0</a>.
1.114 philen 75: </td>
76: </tr>
77: </table>
1.56 deraadt 78: <hr>
79:
1.294 david 80: <a name="goals"></a>
1.278 deraadt 81: <ul>
1.294 david 82: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 83:
1.14 deraadt 84: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 85: ONE in the industry for security (if we are not already there). Our
86: open software development model permits us to take a more
87: uncompromising view towards increased security than Sun, SGI, IBM, HP,
88: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 89: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 90: cryptography</a>, we are able to take cryptographic approaches towards
91: fixing security problems.<p>
1.18 deraadt 92:
1.288 matthieu 93: <a name="disclosure"></a>
1.294 david 94: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 95:
1.45 deraadt 96: Like many readers of the
1.196 jufi 97: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 98: BUGTRAQ mailing list</a>,
1.106 deraadt 99: we believe in full disclosure of security problems. In the
100: operating system arena, we were probably the first to embrace
101: the concept. Many vendors, even of free software, still try
102: to hide issues from their users.<p>
103:
104: Security information moves very fast in cracker circles. On the other
105: hand, our experience is that coding and releasing of proper security
106: fixes typically requires about an hour of work -- very fast fix
107: turnaround is possible. Thus we think that full disclosure helps the
108: people who really care about security.<p>
109:
1.288 matthieu 110: <a name="process"></a>
1.294 david 111: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 112:
1.12 deraadt 113: Our security auditing team typically has between six and twelve
1.45 deraadt 114: members who continue to search for and fix new security holes. We
115: have been auditing since the summer of 1996. The process we follow to
116: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 117: every critical software component. We are not so much looking for
118: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 119: years later someone discovers the problem used to be a security
1.106 deraadt 120: issue, and we fixed it because it was just a bug, well, all the
121: better. Flaws have been found in just about every area of the system.
122: Entire new classes of security problems have been found during our
123: audit, and often source code which had been audited earlier needs
124: re-auditing with these new flaws in mind. Code often gets audited
125: multiple times, and by multiple people with different auditing
126: skills.<p>
1.12 deraadt 127:
1.94 deraadt 128: Some members of our security auditing team worked for Secure Networks,
129: the company that made the industry's premier network security scanning
130: software package Ballista (Secure Networks got purchased by Network
131: Associates, Ballista got renamed to Cybercop Scanner, and well...)
132: That company did a lot of security research, and thus fit in well
1.106 deraadt 133: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
134: colours since day 1.<p>
1.31 deraadt 135:
1.34 deraadt 136: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 137: In most cases we have found that the determination of exploitability
138: is not an issue. During our ongoing auditing process we find many
139: bugs, and endeavor to fix them even though exploitability is not
140: proven. We fix the bug, and we move on to find other bugs to fix. We
141: have fixed many simple and obvious careless programming errors in code
142: and only months later discovered that the problems were in fact
143: exploitable. (Or, more likely someone on
1.197 jufi 144: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 145: would report that other operating systems were vulnerable to a `newly
146: discovered problem', and then it would be discovered that OpenBSD had
147: been fixed in a previous release). In other cases we have been saved
148: from full exploitability of complex step-by-step attacks because we
149: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 150: managed such a success is the lpd advisory that Secure Networks put out.
151: <p>
1.29 deraadt 152:
1.288 matthieu 153: <a name="newtech"></a>
1.294 david 154: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 155:
156: As we audit source code, we often invent new ways of solving problems.
157: Sometimes these ideas have been used before in some random application
158: written somewhere, but perhaps not taken to the degree that we do.
159: <p>
160:
161: <ul>
162: <li>strlcpy() and strlcat()
163: <li>Memory protection purify
164: <ul>
165: <li>W^X
166: <li>.rodata segment
167: <li>Guard pages
168: <li>Randomized malloc()
169: <li>Randomized mmap()
170: <li>atexit() and stdio protection
171: </ul>
1.295 otto 172: <li>Privilege separation
1.278 deraadt 173: <li>Privilege revocation
174: <li>Chroot jailing
175: <li>New uids
176: <li>ProPolice
177: <li>... and others
178: </ul>
179: <p>
180:
1.294 david 181: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 182:
1.45 deraadt 183: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 184: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 185: commonplace in security forums like
1.197 jufi 186: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 187:
1.45 deraadt 188: The most intense part of our security auditing happened immediately
1.80 espie 189: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 190: over the last third of 1996 and first half of 1997. Thousands (yes,
191: thousands) of security issues were fixed rapidly over this year-long
192: period; bugs like the standard buffer overflows, protocol
193: implementation weaknesses, information gathering, and filesystem
194: races. Hence most of the security problems that we encountered were
195: fixed before our 2.1 release, and then a far smaller number needed
196: fixing for our 2.2 release. We do not find as many problems anymore,
197: it is simply a case of diminishing returns. Recently the security
198: problems we find and fix tend to be significantly more obscure or
199: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 200:
1.35 deraadt 201: <ul>
1.45 deraadt 202: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 203: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 204: to search for more complicated exploits, so we will too.
205: <li>Finding and fixing subtle flaws in complicated software is
206: a lot of fun.
1.35 deraadt 207: </ul>
1.106 deraadt 208: <p>
1.15 deraadt 209:
1.14 deraadt 210: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 211: to find and fix new security flaws.<p>
1.12 deraadt 212:
1.288 matthieu 213: <a name="default"></a>
1.294 david 214: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 215:
216: To ensure that novice users of OpenBSD do not need to become security
217: experts overnight (a viewpoint which other vendors seem to have), we
218: ship the operating system in a Secure by Default mode. All non-essential
219: services are disabled. As the user/administrator becomes more familiar
220: with the system, he will discover that he has to enable daemons and other
221: parts of the system. During the process of learning how to enable a new
222: service, the novice is more likely to learn of security considerations.<p>
223:
224: This is in stark contrast to the increasing number of systems that
225: ship with NFS, mountd, web servers, and various other services enabled
226: by default, creating instantaneous security problems for their users
227: within minutes after their first install.<p>
228:
1.288 matthieu 229: <a name="crypto"></a>
1.294 david 230: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 231:
232: And of course, since the OpenBSD project is based in Canada, it is possible
233: for us to integrate cryptography. For more information, read the page
1.116 deraadt 234: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 235:
1.294 david 236: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 237:
238: <li>
1.388 ! miod 239: <a name="50"></a>
! 240:
! 241: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
! 242: These are the OpenBSD 5.0 advisories -- all these problems are solved
! 243: in <a href=anoncvs.html>OpenBSD current</a> and the
! 244: <a href=stable.html>patch branch</a>.
! 245:
! 246: <p>
! 247: <ul>
! 248: None yet!
! 249: </ul>
! 250:
! 251: <li>
1.387 miod 252: <a name="49"></a>
253:
254: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
255: These are the OpenBSD 4.9 advisories -- all these problems are solved
256: in <a href=anoncvs.html>OpenBSD current</a> and the
257: <a href=stable.html>patch branch</a>.
258:
259: <p>
260: <ul>
261: None yet!
262: </ul>
263:
1.388 ! miod 264: <p>
! 265: OpenBSD 4.8 and earlier releases are not supported anymore. The following
! 266: paragraphs only list advisories issued while they were maintained; these
! 267: releases are likely to be affected by the advisories for more recent releases.
! 268: <br>
! 269:
1.387 miod 270: <li>
271: <a name="48"></a>
272:
273: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
274: These are the OpenBSD 4.8 advisories -- all these problems are solved
275: in <a href=anoncvs.html>OpenBSD current</a> and the
276: <a href=stable.html>patch branch</a>.
277:
278: <p>
279: <ul>
280: <li><a href="errata48.html#009_pf">February 16, 2011:
281: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
282: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
283: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
284: prefixes "10.1.1.1/30") are not affected.</a>
285: <li><a href="errata48.html#008_openssl">February 11, 2011:
286: An incorrectly formatted ClientHello handshake message could cause
287: OpenSSL to parse past the end of the message. An attacker could use
288: this flaw to trigger an invalid memory access, causing a crash of an
289: application linked to OpenSSL. As well, certain applications may expose
290: the contents of parsed OCSP extensions, specifically the OCSP nonce
291: extension.
292: <br>
293: Applications are only affected if they act as a server and call
294: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
295: that nothing in the base OS uses this. Apache httpd started using this
296: in v2.3.3; this is newer than the version in ports.</a>
297: <li><a href="errata48.html#005_pf">December 17, 2010:
298: Insufficent initialization of the pf rule structure in the ioctl
299: handler may allow userland to modify kernel memory. By default root
300: privileges are needed to add or modify pf rules.</a>
301: </ul>
302:
303: <li>
1.385 jasper 304: <a name="47"></a>
305:
306: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
307: These are the OpenBSD 4.7 advisories -- all these problems are solved
308: in <a href=anoncvs.html>OpenBSD current</a> and the
309: <a href=stable.html>patch branch</a>.
310:
311: <p>
312: <ul>
1.387 miod 313: <li><a href="errata47.html#013_pf">February 16, 2011:
314: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
315: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
316: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
317: prefixes "10.1.1.1/30") are not affected.</a>
318: <li><a href="errata47.html#012_openssl">February 11, 2011:
319: An incorrectly formatted ClientHello handshake message could cause
320: OpenSSL to parse past the end of the message. An attacker could use
321: this flaw to trigger an invalid memory access, causing a crash of an
322: application linked to OpenSSL. As well, certain applications may expose
323: the contents of parsed OCSP extensions, specifically the OCSP nonce
324: extension.
325: <br>
326: Applications are only affected if they act as a server and call
327: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
328: that nothing in the base OS uses this. Apache httpd started using this
329: in v2.3.3; this is newer than the version in ports.</a>
330: <li><a href="errata47.html#009_pf">December 17, 2010:
331: Insufficent initialization of the pf rule structure in the ioctl
332: handler may allow userland to modify kernel memory. By default root
333: privileges are needed to add or modify pf rules.</a>
334: <li><a href="errata47.html#004_pfsync">April 23, 2010:
335: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 336: <li><a href="errata47.html#003_openssl">April 14, 2010:
337: In TLS connections, certain incorrectly formatted records can
338: cause an OpenSSL client or server to crash due to a read
339: attempt at NULL.</a>.
340: </ul>
341:
342: <li>
1.378 jasper 343: <a name="46"></a>
344:
345: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
346: These are the OpenBSD 4.6 advisories -- all these problems are solved
347: in <a href=anoncvs.html>OpenBSD current</a> and the
348: <a href=stable.html>patch branch</a>.
349:
350: <p>
351: <ul>
1.385 jasper 352: <li><a href="errata46.html#010_openssl">April 14, 2010:
353: In TLS connections, certain incorrectly formatted records can
354: cause an OpenSSL client or server to crash due to a read
355: attempt at NULL.</a>.
1.384 jasper 356: <li><a href="errata46.html#006_openssl">March 12, 2010:
357: OpenSSL is susceptible to a buffer overflow due to a failure
358: to check for NULL returns from bn_wexpand function calls</a>.
1.383 sthen 359: <li><a href="errata46.html#004_openssl">November 26, 2009:
360: The SSL/TLS protocol is subject to man-in-the-middle attacks
361: related to renegotiation</a>.
1.378 jasper 362: </ul>
1.382 tobias 363:
364: <li>
1.373 djm 365: <a name="45"></a>
366:
367: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
368: These are the OpenBSD 4.5 advisories -- all these problems are solved
369: in <a href=anoncvs.html>OpenBSD current</a> and the
370: <a href=stable.html>patch branch</a>.
371:
372: <p>
373: <ul>
1.385 jasper 374: <li><a href="errata45.html#016_openssl">April 14, 2010:
375: In TLS connections, certain incorrectly formatted records can
376: cause an OpenSSL client or server to crash due to a read
377: attempt at NULL.</a>.
378: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 379: OpenSSL is susceptible to a buffer overflow due to a failure
380: to check for NULL returns from bn_wexpand function calls</a>.
1.383 sthen 381: <li><a href="errata45.html#010_openssl">November 26, 2009:
382: The SSL/TLS protocol is subject to man-in-the-middle attacks
383: related to renegotiation</a>.
1.373 djm 384: </ul>
385:
386: <li>
1.365 deraadt 387: <a name="44"></a>
388:
389: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
390: These are the OpenBSD 4.4 advisories -- all these problems are solved
391: in <a href=anoncvs.html>OpenBSD current</a> and the
392: <a href=stable.html>patch branch</a>.
393:
394: <p>
395: <ul>
1.372 millert 396: <li><a href="errata44.html#011_sudo">February 22, 2009:
397: sudo(8) may allow a user listed in sudoers to run a command
398: as a different user than their access rule specifies when a Unix
399: group is used in the RunAs portion of the rule.</a>
1.370 djm 400: <li><a href="errata44.html#008_bind">January 15, 2009:
401: named(8) suffered from a similar logic error that may allow
402: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 403: <li><a href="errata44.html#007_openssl">January 9, 2009:
404: OpenSSL suffered from some logic errors that allowed bypass
405: of DSA/ECDSA certificate validation.</a>
1.367 brad 406: <li><a href="errata44.html#001_ndp">November 2, 2008:
407: The Neighbor Discovery Protocol (ndp) did not correctly verify
408: neighbor solicitation requests maybe allowing a nearby attacker
409: to intercept traffic.</a>
1.365 deraadt 410: </ul>
411:
412: <li>
1.357 brad 413: <a name="43"></a>
414:
415: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
416: These are the OpenBSD 4.3 advisories -- all these problems are solved
417: in <a href=anoncvs.html>OpenBSD current</a> and the
418: <a href=stable.html>patch branch</a>.
419:
420: <p>
421: <ul>
1.372 millert 422: <li><a href="errata43.html#011_sudo">February 22, 2009:
423: sudo(8) may allow a user listed in sudoers to run a command
424: as a different user than their access rule specifies when a Unix
425: group is used in the RunAs portion of the rule.</a>
1.370 djm 426: <li><a href="errata43.html#008_bind">January 15, 2009:
427: named(8) suffered from a similar logic error that may allow
428: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 429: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 430: OpenSSL suffered from some logic errors that allowed bypass
431: of DSA/ECDSA certificate validation.</a>
1.382 tobias 432: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 433: The Neighbor Discovery Protocol (ndp) did not correctly verify
434: neighbor solicitation requests maybe allowing a nearby attacker
435: to intercept traffic.</a>
1.362 brad 436: <li><a href="errata43.html#004_bind">July 23, 2008:
437: A vulnerability has been found with BIND.</a>
1.361 brad 438: <li><a href="errata43.html#003_xorg">July 15, 2008:
439: Multiple vulnerabilities in X.Org.</a>
1.359 brad 440: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 441: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 442: <li><a href="errata43.html#001_openssh">March 30, 2008:
443: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 444: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 445: </ul>
446:
447: <li>
1.348 merdely 448: <a name="42"></a>
449: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
450: These are the OpenBSD 4.2 advisories -- all these problems are solved
451: in <a href=anoncvs.html>OpenBSD current</a> and the
452: <a href=stable.html>patch branch</a>.
453:
454: <p>
455: <ul>
1.364 tobias 456: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 457: The Neighbor Discovery Protocol (ndp) did not correctly verify
458: neighbor solicitation requests maybe allowing a nearby attacker
459: to intercept traffic.</a>
1.362 brad 460: <li><a href="errata42.html#013_bind">July 23, 2008:
461: A vulnerability has been found with BIND.</a>
1.361 brad 462: <li><a href="errata42.html#012_xorg2">July 15, 2008:
463: Multiple vulnerabilities in X.Org.</a>
1.359 brad 464: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 465: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 466: <li><a href="errata42.html#010_openssh">March 30, 2008:
467: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 468: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 469: <li><a href="errata42.html#009_ppp">March 7, 2008:
470: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 471: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
472: Multiple vulnerabilities in X.Org.</a>
1.351 okan 473: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
474: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 475: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 476: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 477: </ul>
478:
479: <li>
1.346 matthieu 480: <a name="41"></a>
481:
482: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
483: These are the OpenBSD 4.1 advisories -- all these problems are solved
484: in <a href=anoncvs.html>OpenBSD current</a> and the
485: <a href=stable.html>patch branch</a>.
486:
487: <p>
488: <ul>
1.359 brad 489: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 490: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 491: <li><a href="errata41.html#015_openssh">March 30, 2008:
492: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 493: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 494: <li><a href="errata41.html#014_ppp">March 7, 2008:
495: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 496: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
497: Multiple vulnerabilities in X.Org.</a>
498: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
499: The SSL_get_shared_ciphers() function in OpenSSL contains
500: an off-by-one overflow.</a>
1.350 deraadt 501: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 502: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 503: <li><a href="errata41.html#009_file">Jul 9, 2007:
504: Fix possible heap overflow in file(1).</a>
1.346 matthieu 505: <li><a href="errata41.html#005_route6">Apr 27, 2007:
506: IPv6 type 0 route headers can be used to mount a DoS attack
507: against hosts and networks.</a>
508: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
509: Multiple vulnerabilities in X.Org.</a>
510: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
511: Incorrect mbuf handling for ICMP6 packets.</a>
512: </ul>
513:
514: <li>
1.334 brad 515: <a name="40"></a>
516: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
517: These are the OpenBSD 4.0 advisories -- all these problems are solved
518: in <a href=anoncvs.html>OpenBSD current</a> and the
519: <a href=stable.html>patch branch</a>.
520:
521: <p>
522: <ul>
1.382 tobias 523: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
524: The SSL_get_shared_ciphers() function in OpenSSL contains an
525: off-by-one overflow.</a>
1.350 deraadt 526: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 527: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 528: <li><a href="errata40.html#015_file">Jul 9, 2007:
529: Fix possible heap overflow in file(1).</a>
1.343 deraadt 530: <li><a href="errata40.html#012_route6">Apr 23, 2007:
531: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 532: against hosts and networks.</a>
1.342 mbalmer 533: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
534: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 535: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
536: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 537: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 538: Insufficient validation in vga(4) may allow an attacker to gain
539: root privileges on some i386 systems.</a>
1.339 deraadt 540: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 541: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 542: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 543: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
544: found by Chris Evans.</a>
1.339 deraadt 545: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 546: Several problems have been found in OpenSSL.</a>
1.339 deraadt 547: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 548: httpd(8) does not sanitize the Expect header from an HTTP request
549: when it is reflected back in an error message, which might allow
550: cross-site scripting (XSS) style attacks.</a>
551: </ul>
552:
553: <li>
1.321 brad 554: <a name="39"></a>
555:
556: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
557: These are the OpenBSD 3.9 advisories -- all these problems are solved
558: in <a href=anoncvs.html>OpenBSD current</a> and the
559: <a href=stable.html>patch branch</a>.
560:
561: <p>
562: <ul>
1.343 deraadt 563: <li><a href="errata39.html#022_route6">Apr 23, 2007:
564: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 565: against hosts and networks.</a>
1.342 mbalmer 566: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
567: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 568: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
569: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 570: <li><a href="errata39.html#agp">Jan 3, 2007:
571: Insufficient validation in vga(4) may allow an attacker to gain
572: root privileges on some i386 systems.</a>
1.336 brad 573: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 574: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 575: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 576: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 577: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 578: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 579: found by Chris Evans.</a>
1.333 deraadt 580: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 581: Several problems have been found in OpenSSL.</a>
1.333 deraadt 582: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 583: httpd(8) does not sanitize the Expect header from an HTTP request
584: when it is reflected back in an error message, which might allow
585: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 586: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 587: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
588: possible for an attacker to construct an invalid signature which
589: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 590: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 591: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 592: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 593: Due to the failure to correctly validate LCP configuration option
594: lengths, it is possible for an attacker to send LCP packets via an
595: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 596: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 597: A problem in isakmpd(8) caused IPsec to run partly without replay
598: protection.</a>
1.333 deraadt 599: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 600: It is possible to cause the kernel to panic when more than the default
601: number of sempahores have been allocated.</a>
1.333 deraadt 602: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 603: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
604: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
605: option.</a>
1.333 deraadt 606: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 607: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 608: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 609: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
610: overflow.</a>
1.333 deraadt 611: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 612: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 613: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 614: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 615: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 616: A race condition has been reported to exist in the handling by sendmail
617: of asynchronous signals.</a>
618: </ul>
619:
620: <li>
1.318 deraadt 621: <a name="38"></a>
622:
623: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
624: These are the OpenBSD 3.8 advisories -- all these problems are solved
625: in <a href=anoncvs.html>OpenBSD current</a> and the
626: <a href=stable.html>patch branch</a>.
627:
628: <p>
629: <ul>
1.332 brad 630: <li><a href="errata38.html#ssh2">Oct 12, 2006:
631: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 632: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 633: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 634: found by Chris Evans.</a>
635: <li><a href="errata38.html#openssl2">Oct 7, 2006:
636: Several problems have been found in OpenSSL.</a>
637: <li><a href="errata38.html#httpd2">Oct 7, 2006:
638: httpd(8) does not sanitize the Expect header from an HTTP request
639: when it is reflected back in an error message, which might allow
640: cross-site scripting (XSS) style attacks.</a>
1.329 brad 641: <li><a href="errata38.html#openssl">Sep 8, 2006:
642: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
643: possible for an attacker to construct an invalid signature which
644: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 645: <li><a href="errata38.html#bind">Sep 8, 2006:
646: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 647: <li><a href="errata38.html#sppp">Sep 2, 2006:
648: Due to the failure to correctly validate LCP configuration option
649: lengths, it is possible for an attacker to send LCP packets via an
650: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 651: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
652: A problem in isakmpd(8) caused IPsec to run partly without replay
653: protection.</a>
654: <li><a href="errata38.html#sem">Aug 25, 2006:
655: It is possible to cause the kernel to panic when more than the default
656: number of sempahores have been allocated.</a>
657: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
658: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
659: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
660: option.</a>
661: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
662: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 663: <li><a href="errata38.html#httpd">Jul 30, 2006:
664: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
665: overflow.</a>
1.324 brad 666: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
667: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 668: <li><a href="errata38.html#xorg">May 2, 2006:
669: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 670: <li><a href="errata38.html#sendmail">Mar 25, 2006:
671: A race condition has been reported to exist in the handling by sendmail
672: of asynchronous signals.</a>
673: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 674: Josh Bressers has reported a weakness in OpenSSH caused due to the
675: insecure use of the system(3) function in scp(1) when performing copy
676: operations using filenames that are supplied by the user from the
677: command line.</a>
1.321 brad 678: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 679: Do not allow users to trick suid programs into re-opening files via
680: /dev/fd.</a>
1.321 brad 681: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 682: A buffer overflow has been found in the Perl interpreter with the
683: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 684: </ul>
685:
686: <li>
1.312 david 687: <a name="37"></a>
688:
689: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
690: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 691: in <a href="anoncvs.html">OpenBSD current</a>. The
692: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
693: you should update your machine.
1.312 david 694:
695: <p>
696: <ul>
1.322 brad 697: <li><a href="errata37.html#xorg">May 2, 2006:
698: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 699: <li><a href="errata37.html#sendmail">Mar 25, 2006:
700: A race condition has been reported to exist in the handling by sendmail
701: of asynchronous signals.</a>
1.320 brad 702: <li><a href="errata37.html#ssh">Feb 12, 2006:
703: Josh Bressers has reported a weakness in OpenSSH caused due to the
704: insecure use of the system(3) function in scp(1) when performing copy
705: operations using filenames that are supplied by the user from the
706: command line.</a>
1.319 brad 707: <li><a href="errata37.html#fd">Jan 5, 2006:
708: Do not allow users to trick suid programs into re-opening files via
709: /dev/fd.</a>
710: <li><a href="errata37.html#perl">Jan 5, 2006:
711: A buffer overflow has been found in the Perl interpreter with the
712: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 713: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 714: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 715: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 716: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 717: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 718: Fix a race condition in sudo(8) that could allow a user
1.315 millert 719: to run arbitrary commands.</a>
1.318 deraadt 720: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 721: Fix a buffer overflow, memory leaks, and NULL pointer
722: dereference in cvs(1).</a>
1.312 david 723: </ul>
724:
725: <li>
1.301 miod 726: <a name="36"></a>
727:
728: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
729: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 730: in <a href="anoncvs.html">OpenBSD current</a>. The
731: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
732: you should update your machine.
1.301 miod 733:
734: <p>
1.302 markus 735: <ul>
1.317 millert 736: <li><a href="errata36.html#libz2">Jul 21, 2005:
737: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 738: <li><a href="errata36.html#libz">Jul 6, 2005:
739: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 740: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 741: Fix a race condition in sudo(8) that could allow a user
1.315 millert 742: to run arbitrary commands.</a>
1.311 deraadt 743: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 744: Fix a buffer overflow, memory leaks, and NULL pointer
745: dereference in cvs(1).</a>
1.311 deraadt 746: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 747: Due to buffer overflows in telnet(1), a malicious
748: server or man-in-the-middle attack could allow
749: execution of arbitrary code with the privileges of
750: the user invoking telnet(1).</a>
1.311 deraadt 751: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 752: More stringent checking should be done in the copy(9)
753: functions to prevent their misuse.</a>
1.311 deraadt 754: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 755: More stringent checking should be done in the copy(9)
756: functions to prevent their misuse.</a>
1.311 deraadt 757: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 758: httpd(8)'s mod_include module fails to properly validate
759: the length of user supplied tag strings prior to copying
1.305 brad 760: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 761: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 762: On systems running isakmpd(8) it is possible for a local
763: user to cause kernel memory corruption and system panic by
1.303 markus 764: setting ipsec(4) credentials on a socket.</a>
1.302 markus 765: </ul>
1.301 miod 766:
767: <li>
1.288 matthieu 768: <a name="35"></a>
1.279 deraadt 769:
1.294 david 770: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 771: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 772: in <a href="anoncvs.html">OpenBSD current</a>. The
773: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
774: you should update your machine.
1.279 deraadt 775:
776: <p>
777: <ul>
1.310 brad 778: <li><a href="errata35.html#cvs4">Apr 28, 2005:
779: Fix a buffer overflow, memory leaks, and NULL pointer
780: dereference in cvs(1).</a>
1.309 brad 781: <li><a href="errata35.html#telnet">Mar 30, 2005:
782: Due to buffer overflows in telnet(1), a malicious
783: server or man-in-the-middle attack could allow
784: execution of arbitrary code with the privileges of
785: the user invoking telnet(1).</a>
1.308 brad 786: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 787: More stringent checking should be done in the copy(9)
788: functions to prevent their misuse.</a>
1.306 brad 789: <li><a href="errata35.html#locore">Feb 28, 2005:
790: More stringent checking should be done in the copy(9)
791: functions to prevent their misuse.</a>
1.304 brad 792: <li><a href="errata35.html#httpd3">Jan 12, 2005:
793: httpd(8)'s mod_include module fails to properly validate
794: the length of user supplied tag strings prior to copying
1.305 brad 795: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 796: <li><a href="errata35.html#pfkey">Dec 14, 2004:
797: On systems running isakmpd(8) it is possible for a local
798: user to cause kernel memory corruption and system panic by
1.303 markus 799: setting ipsec(4) credentials on a socket.</a>
1.301 miod 800: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 801: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 802: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 803: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 804: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 805: httpd(8)'s mod_rewrite module can be made to write one zero byte in
806: an arbitrary memory position outside of a char array, causing a DoS
807: or possibly buffer overflows.</a>
1.301 miod 808: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 809: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 810: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 811: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 812: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 813: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 814: Multiple remote vulnerabilities have been found in the cvs(1)
815: server which can be used by CVS clients to crash or execute
1.293 brad 816: arbitrary code on the server.</a>
1.301 miod 817: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 818: kdc(8) performs inadequate checking of request fields, leading
819: to the possibility of principal impersonation from other
820: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 821: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 822: xdm(1) ignores the requestPort resource and creates a
1.293 brad 823: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 824: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 825: A buffer overflow in the cvs(1) server has been found,
826: which can be used by CVS clients to execute arbitrary code on
1.293 brad 827: the server.</a>
1.301 miod 828: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 829: Integer overflow problems were found in procfs, allowing
1.293 brad 830: reading of arbitrary kernel memory.</a>
1.301 miod 831: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 832: Pathname validation problems have been found in cvs(1),
833: allowing clients and servers access to files outside the
1.293 brad 834: repository or local CVS tree.</a>
1.279 deraadt 835: </ul>
836:
837: <p>
838: <li>
1.288 matthieu 839: <a name="34"></a>
1.261 david 840:
1.294 david 841: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 842: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 843: in <a href="anoncvs.html">OpenBSD current</a>. The
844: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
845: you should update your machine.
1.261 david 846: <p>
847: <ul>
1.302 markus 848: <li><a href="errata34.html#pfkey">Dec 14, 2004:
849: On systems running isakmpd(8) it is possible for a local
850: user to cause kernel memory corruption and system panic by
1.303 markus 851: setting ipsec(4) credentials on a socket.</a>
1.298 brad 852: <li><a href="errata34.html#xpm">Sep 16, 2004:
853: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 854: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
855: httpd(8)'s mod_rewrite module can be made to write one zero byte in
856: an arbitrary memory position outside of a char array, causing a DoS
857: or possibly buffer overflows.</a>
1.294 david 858: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 859: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 860: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 861: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 862: an attacker can delete IPsec tunnels at will.</a>
1.294 david 863: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 864: Multiple remote vulnerabilities have been found in the cvs(1)
865: server which can be used by CVS clients to crash or execute
1.293 brad 866: arbitrary code on the server.</a>
1.294 david 867: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 868: kdc(8) performs inadequate checking of request fields, leading
869: to the possibility of principal impersonation from other
870: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 871: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 872: A buffer overflow in the cvs(1) server has been found,
873: which can be used by CVS clients to execute arbitrary code on
874: the server.</a>
1.294 david 875: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 876: Integer overflow problems were found in procfs, allowing
877: reading of arbitrary kernel memory.</a>
1.294 david 878: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 879: Pathname validation problems have been found in cvs(1),
880: allowing clients and servers access to files outside the
881: repository or local CVS tree.</a>
1.294 david 882: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 883: A missing check for a NULL-pointer dereference may allow a
1.281 otto 884: remote attacker to crash applications using OpenSSL.</a>
1.294 david 885: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 886: Defects in the payload validation and processing functions of
887: isakmpd have been discovered. An attacker could send malformed
888: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 889: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 890: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
891: access module, using IP addresses without a netmask on big endian
892: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 893: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 894: An IPv6 MTU handling problem exists that could be used by an
895: attacker to cause a denial of service attack.</a>
1.294 david 896: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 897: A reference counting bug in shmat(2) could be used to write to
898: kernel memory under certain circumstances.</a>
1.294 david 899: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 900: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 901: by Thomas Walpuski.</a>
1.294 david 902: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 903: It may be possible for a local user to overrun the stack in
904: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 905: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 906: The use of certain ASN.1 encodings or malformed public keys may
907: allow an attacker to mount a denial of service attack against
908: applications linked with ssl(3).</a>
1.261 david 909: </ul>
910:
911: <li>
1.288 matthieu 912: <a name="33"></a>
1.246 deraadt 913:
1.294 david 914: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 915: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 916: in <a href="anoncvs.html">OpenBSD current</a>. The
917: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 918: you should update your machine.
1.246 deraadt 919: <p>
920: <ul>
1.294 david 921: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 922: Pathname validation problems have been found in cvs(1),
923: allowing clients and servers access to files outside the
924: repository or local CVS tree.</a>
1.294 david 925: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 926: A missing check for a NULL-pointer dereference may allow a
1.281 otto 927: remote attacker to crash applications using OpenSSL.</a>
1.294 david 928: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 929: Defects in the payload validation and processing functions of
930: isakmpd have been discovered. An attacker could send malformed
931: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 932: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 933: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
934: access module, using IP addresses without a netmask on big endian
935: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 936: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 937: An IPv6 MTU handling problem exists that could be used by an
938: attacker to cause a denial of service attack.</a>
1.294 david 939: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 940: A reference counting bug in shmat(2) could be used to write to
941: kernel memory under certain circumstances.</a>
1.294 david 942: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 943: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 944: by Thomas Walpuski.</a>
1.294 david 945: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 946: It may be possible for a local user to execute arbitrary code
947: resulting in escalation of privileges due to a stack overrun
948: in compat_ibcs2(8).</a>
1.294 david 949: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 950: The use of certain ASN.1 encodings or malformed public keys may
951: allow an attacker to mount a denial of service attack against
952: applications linked with ssl(3).</a>
1.294 david 953: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 954: Access of freed memory in pf(4) could be used to
1.260 margarid 955: remotely panic a machine using scrub rules.</a>
1.294 david 956: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 957: A buffer overflow in the address parsing in
958: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 959: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 960: OpenSSH versions prior to 3.7 contains a buffer management error
961: that is potentially exploitable.</a>
1.294 david 962: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 963: Root may be able to reduce the security level by taking advantage of
964: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 965: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 966: An improper bounds check in the kernel may allow a local user
967: to panic the kernel.</a>
1.294 david 968: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 969: An off-by-one error exists in the C library function realpath(3)
970: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 971: </ul>
972:
1.265 miod 973:
1.247 david 974: <p>
1.246 deraadt 975: <li>
1.288 matthieu 976: <a name="32"></a>
1.224 deraadt 977:
1.294 david 978: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 979: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 980: in <a href="anoncvs.html">OpenBSD current</a>. The
981: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 982: you should update your machine.
1.224 deraadt 983: <p>
984: <ul>
1.294 david 985: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 986: The use of certain ASN.1 encodings or malformed public keys may
987: allow an attacker to mount a denial of service attack against
988: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 989: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 990: Access of freed memory in pf(4) could be used to
1.260 margarid 991: remotely panic a machine using scrub rules.</a>
1.294 david 992: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 993: A buffer overflow in the address parsing in
994: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 995: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 996: OpenSSH versions prior to 3.7 contains a buffer management error
997: that is potentially exploitable.</a>
1.294 david 998: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 999: Fix for a potential security issue in
1000: sendmail(8) with respect to DNS maps.</a>
1.294 david 1001: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1002: An off-by-one error exists in the C library function realpath(3)
1003: may allow an attacker to gain escalated privileges.</a>
1.294 david 1004: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1005: A buffer overflow in the address parsing in
1006: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1007: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1008: A cryptographic weaknesses in the Kerberos v4 protocol can be
1009: exploited on Kerberos v5 as well.</a>
1.294 david 1010: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1011: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1012: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1013: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1014: Various SSL and TLS operations in OpenSSL are vulnerable to
1015: timing attacks.</a>
1.294 david 1016: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1017: A buffer overflow in lprm(1) may allow an attacker to elevate
1018: privileges to user daemon.</a>.
1.294 david 1019: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1020: A buffer overflow in the envelope comments processing in
1021: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1022: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1023: httpd(8) leaks file inode numbers via ETag header as well as
1024: child PIDs in multipart MIME boundary generation. This could
1025: lead, for example, to NFS exploitation because it uses inode
1026: numbers as part of the file handle.</a>
1.294 david 1027: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1028: In ssl(8) an information leak can occur via timing by performing
1029: a MAC computation even if incorrect block cipher padding has
1030: been found, this is a countermeasure. Also, check for negative
1031: sizes, in allocation routines.</a>
1.294 david 1032: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1033: A double free exists in cvs(1) that could lead to privilege
1034: escalation for cvs configurations where the cvs command is
1.233 margarid 1035: run as a privileged user.</a>
1.294 david 1036: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1037: A buffer overflow exists in named(8) that could lead to a
1038: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1039: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1040: A logic error in the pool kernel memory allocator could cause
1041: memory corruption in low-memory situations, causing the system
1042: to crash.</a>
1.294 david 1043: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1044: An attacker can bypass smrsh(8)'s restrictions and execute
1045: arbitrary commands with the privileges of his own account.</a>
1.294 david 1046: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1047: Network bridges running pf with scrubbing enabled could cause
1048: mbuf corruption, causing the system to crash.</a>
1.294 david 1049: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1050: A buffer overflow can occur in the kadmind(8) daemon, leading
1051: to possible remote crash or exploit.</a>
1.224 deraadt 1052: </ul>
1053:
1.227 miod 1054: <p>
1055: <li>
1.288 matthieu 1056: <a name="31"></a>
1.203 deraadt 1057:
1.294 david 1058: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1059: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1060: in <a href="anoncvs.html">OpenBSD current</a>. The
1061: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1062: you should update your machine.
1.203 deraadt 1063:
1064: <p>
1065: <ul>
1.294 david 1066: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1067: A buffer overflow in the address parsing in
1068: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1069: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1070: A cryptographic weaknesses in the Kerberos v4 protocol can be
1071: exploited on Kerberos v5 as well.</a>
1.294 david 1072: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1073: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1074: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1075: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1076: Various SSL and TLS operations in OpenSSL are vulnerable to
1077: timing attacks.</a>
1.294 david 1078: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1079: A buffer overflow in lprm(1) may allow an attacker to gain
1080: root privileges.</a>
1.294 david 1081: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1082: A buffer overflow in the envelope comments processing in
1083: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1084: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1085: In ssl(8) an information leak can occur via timing by performing
1086: a MAC computation even if incorrect block cipher padding has
1087: been found, this is a countermeasure. Also, check for negative
1088: sizes, in allocation routines.</a>
1.294 david 1089: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1090: A double free exists in cvs(1) that could lead to privilege
1091: escalation for cvs configurations where the cvs command is
1.294 david 1092: run as a privileged user</a>.
1093: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1094: A buffer overflow exists in named(8) that could lead to a
1095: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1096: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1097: Incorrect argument checking in the getitimer(2) system call
1098: may allow an attacker to crash the system.</a>
1.294 david 1099: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1100: An attacker can bypass smrsh(8)'s restrictions and execute
1101: arbitrary commands with the privileges of his own account.</a>
1.294 david 1102: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1103: A buffer overflow can occur in the kadmind(8) daemon, leading
1104: to possible remote crash or exploit.</a>
1.294 david 1105: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1106: Incorrect argument checking in the setitimer(2) system call
1107: may allow an attacker to write to kernel memory.</a>
1.294 david 1108: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1109: An insufficient boundary check in the select system call
1.220 miod 1110: allows an attacker to overwrite kernel memory and execute arbitrary code
1111: in kernel context.</a>
1.294 david 1112: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1113: Several remote buffer overflows can occur in the SSL2 server and SSL3
1114: client of the ssl(8) library, as in the ASN.1 parser code in the
1115: crypto(3) library, all of them being potentially remotely
1116: exploitable.</a>
1.294 david 1117: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1118: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1119: possible remote crash.</a>
1.294 david 1120: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1121: A race condition exists in the pppd(8) daemon which may cause it to
1122: alter the file permissions of an arbitrary file.</a>
1.294 david 1123: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1124: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1125: crash.</a>
1.294 david 1126: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1127: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1128: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1129: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1130: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1131: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1132: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1133: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1134: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1135: input validation error that can result in an integer overflow and
1136: privilege escalation.</a>
1.294 david 1137: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1138: A buffer overflow can occur during the interpretation of chunked
1139: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1140: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1141: Under certain conditions, on systems using YP with netgroups
1142: in the password database, it is possible that sshd(8) does
1143: ACL checks for the requested user name but uses the password
1144: database entry of a different user for authentication. This
1145: means that denied users might authenticate successfully
1146: while permitted users could be locked out.</a>
1.294 david 1147: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1148: A race condition exists that could defeat the kernel's
1149: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1150: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1151: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1152: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1153: A local user can gain super-user privileges due to a buffer
1154: overflow in sshd(8) if AFS has been configured on the system
1155: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1156: in the sshd_config file.</a>
1.203 deraadt 1157: </ul>
1158:
1.235 miod 1159: <p>
1.203 deraadt 1160: <li>
1.288 matthieu 1161: <a name="30"></a>
1.187 deraadt 1162:
1.294 david 1163: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1164: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1165: in <a href="anoncvs.html">OpenBSD current</a>. The
1166: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1167: you should update your machine.
1.187 deraadt 1168:
1169: <p>
1170: <ul>
1.294 david 1171: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1172: A buffer overflow exists in named(8) that could lead to a
1173: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1174: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1175: Incorrect argument checking in the getitimer(2) system call
1176: may allow an attacker to crash the system.</a>
1.294 david 1177: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1178: An attacker can bypass smrsh(8)'s restrictions and execute
1179: arbitrary commands with the privileges of his own account.</a>
1.294 david 1180: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1181: A buffer overflow can occur in the kadmind(8) daemon, leading
1182: to possible remote crash or exploit.</a>
1.294 david 1183: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1184: Incorrect argument checking in the setitimer(2) system call
1185: may allow an attacker to write to kernel memory.</a>
1.294 david 1186: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1187: An insufficient boundary check in the select and poll system calls
1188: allows an attacker to overwrite kernel memory and execute arbitrary code
1189: in kernel context.</a>
1.294 david 1190: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1191: Several remote buffer overflows can occur in the SSL2 server and SSL3
1192: client of the ssl(8) library, as in the ASN.1 parser code in the
1193: crypto(3) library, all of them being potentially remotely
1194: exploitable.</a>
1.294 david 1195: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1196: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1197: possible remote crash.</a>
1.294 david 1198: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1199: A race condition exists in the pppd(8) daemon which may cause it to
1200: alter the file permissions of an arbitrary file.</a>
1.294 david 1201: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1202: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1203: crash.</a>
1.294 david 1204: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1205: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1206: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1207: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1208: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1209: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1210: input validation error that can result in an integer overflow and
1211: privilege escalation.</a>
1.294 david 1212: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1213: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1214: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1215: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1216: A buffer overflow can occur during the interpretation of chunked
1217: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1218: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1219: A race condition exists that could defeat the kernel's
1220: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1221: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1222: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1223: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1224: A local user can gain super-user privileges due to a buffer
1225: overflow in sshd(8) if AFS has been configured on the system
1226: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1227: in the sshd_config file.</a>
1.294 david 1228: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1229: The mail(1) was interpreting tilde escapes even when invoked
1230: in non-interactive mode. As mail(1) is called as root from cron,
1231: this can lead to a local root compromise.</a>
1.294 david 1232: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1233: Under certain conditions, on systems using YP with netgroups in
1234: the password database, it is possible for the rexecd(8) and rshd(8)
1235: daemons to execute a shell from a password database entry for a
1236: different user. Similarly, atrun(8) may change to the wrong
1237: home directory when running jobs.</a>
1.294 david 1238: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1239: A potential double free() exists in the zlib library;
1240: this is not exploitable on OpenBSD.
1241: The kernel also contains a copy of zlib; it is not
1242: currently known if the kernel zlib is exploitable.</a>
1.294 david 1243: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1244: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1245: may allow a local user to gain super-user privileges.</a>
1.294 david 1246: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1247: A race condition between the ptrace(2) and execve(2) system calls
1248: allows an attacker to modify the memory contents of suid/sgid
1249: processes which could lead to compromise of the super-user account.</a>
1.294 david 1250: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1251: There is a security hole in sudo(8) that can be exploited
1252: when the Postfix sendmail replacement is installed that may
1253: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1254: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1255: An attacker can trick a machine running the lpd daemon into
1256: creating new files in the root directory from a machine with
1257: remote line printer access.</a>
1.294 david 1258: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1259: The vi.recover script can be abused in such a way as
1260: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1261: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1262: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1263: resulting in a crash.</a>
1.294 david 1264: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1265: A security hole that may allow an attacker to partially authenticate
1266: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1267: </ul>
1268:
1269: <p>
1270: <li>
1.288 matthieu 1271: <a name="29"></a>
1.173 deraadt 1272:
1.294 david 1273: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1274: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1275: in <a href="anoncvs.html">OpenBSD current</a>. The
1276: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1277: you should update your machine.
1278:
1.173 deraadt 1279:
1280: <p>
1281: <ul>
1.294 david 1282: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1283: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1284: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1285: A race condition exists that could defeat the kernel's
1286: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1287: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1288: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1289: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1290: A local user can gain super-user privileges due to a buffer
1291: overflow in sshd(8) if AFS has been configured on the system
1292: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1293: in the sshd_config file.</a>
1.294 david 1294: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1295: The mail(1) was interpreting tilde escapes even when invoked
1296: in non-interactive mode. As mail(1) is called as root from cron,
1297: this can lead to a local root compromise.</a>
1.294 david 1298: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1299: A potential double free() exists in the zlib library;
1300: this is not exploitable on OpenBSD.
1301: The kernel also contains a copy of zlib; it is not
1302: currently known if the kernel zlib is exploitable.</a>
1.294 david 1303: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1304: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1305: may allow a local user to gain super-user privileges.</a>
1.294 david 1306: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1307: A race condition between the ptrace(2) and execve(2) system calls
1308: allows an attacker to modify the memory contents of suid/sgid
1309: processes which could lead to compromise of the super-user account.</a>
1.294 david 1310: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1311: There is a security hole in sudo(8) that can be exploited
1312: when the Postfix sendmail replacement is installed that may
1313: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1314: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1315: An attacker can trick a machine running the lpd daemon into
1316: creating new files in the root directory from a machine with
1317: remote line printer access.</a>
1.294 david 1318: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1319: The vi.recover script can be abused in such a way as
1320: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1321: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1322: A security hole exists in uuxqt(8) that may allow an
1323: attacker to gain root privileges.</a>
1.294 david 1324: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1325: A security hole exists in lpd(8) that may allow an
1326: attacker to gain root privileges if lpd is running.</a>
1.294 david 1327: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1328: A security hole exists in sendmail(8) that may allow an
1329: attacker on the local host to gain root privileges.</a>
1.294 david 1330: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1331: A kernel buffer overflow in the NFS code can be used to execute
1332: arbitrary code by users with mount privileges (only root by
1.181 millert 1333: default).</a>
1.294 david 1334: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1335: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1336: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1337: sshd(8) allows users to delete arbitrary files named "cookies"
1338: if X11 forwarding is enabled. X11 forwarding is disabled
1339: by default.</a>
1.294 david 1340: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1341: Programs using the fts routines can be tricked into changing
1342: into the wrong directory.</a>
1.294 david 1343: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1344: Sendmail signal handlers contain unsafe code,
1345: leading to numerous race conditions.</a>
1.173 deraadt 1346: </ul>
1347:
1348: <p>
1349: <li>
1.288 matthieu 1350: <a name="28"></a>
1.152 deraadt 1351:
1.294 david 1352: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1353: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1354: in <a href="anoncvs.html">OpenBSD current</a>. The
1355: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1356: you should update your machine.
1357:
1.152 deraadt 1358:
1359: <p>
1360: <ul>
1.294 david 1361: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1362: A security hole exists in uuxqt(8) that may allow an
1363: attacker to gain root privileges.</a>
1.294 david 1364: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1365: A security hole exists in lpd(8) that may allow an
1366: attacker to gain root privileges if lpd is running.</a>
1.294 david 1367: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1368: A security hole exists in sendmail(8) that may allow an
1369: attacker on the local host to gain root privileges.</a>
1.294 david 1370: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1371: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1372: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1373: Programs using the fts routines can be tricked into changing
1374: into the wrong directory.</a>
1.294 david 1375: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1376: Sendmail signal handlers contain unsafe code,
1377: leading to numerous race conditions.</a>
1.294 david 1378: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1379: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1380: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1381: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1382: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1383: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1384: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1385: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1386: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1387: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1388: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1389: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1390: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1391: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1392: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1393: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1394: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1395: rnd(4) did not use all of its input when written to.</a>
1.294 david 1396: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1397: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1398: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1399: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1400: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1401: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1402: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1403: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1404: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1405: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1406: </ul>
1407:
1408: <p>
1409: <li>
1.288 matthieu 1410: <a name="27"></a>
1.124 deraadt 1411:
1.294 david 1412: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1413: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1414: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1415: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1416:
1417: <p>
1418: <ul>
1.294 david 1419: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1420: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1421: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1422: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1423: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1424: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1425: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1426: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1427: (patch included)</a>
1.294 david 1428: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1429: X11 libraries have 2 potential overflows in xtrans code.
1430: (patch included)</a>
1.294 david 1431: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1432: Apache mod_rewrite and mod_vhost_alias modules could expose files
1433: on the server in certain configurations if used.
1434: (patch included)</a>
1.294 david 1435: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1436: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1437: TERMPATH and TERMCAP environment variables as it should.
1438: (patch included)</a>
1.294 david 1439: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1440: There are printf-style format string bugs in several privileged
1441: programs. (patch included)</a>
1.294 david 1442: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1443: libcurses honored terminal descriptions in the $HOME/.terminfo
1444: directory as well as in the TERMCAP environment variable for
1445: setuid and setgid applications.
1.146 deraadt 1446: (patch included)</a>
1.294 david 1447: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1448: A format string vulnerability exists in talkd(8).
1449: (patch included)</a>
1.294 david 1450: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1451: A format string vulnerability exists in the pw_error() function of the
1452: libutil library, yielding localhost root through chpass(1).
1453: (patch included)</a>
1.294 david 1454: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1455: Bad ESP/AH packets could cause a crash under certain conditions.
1456: (patch included)</a>
1.294 david 1457: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1458: A format string vulnerability (localhost root) exists in xlock(1).
1459: (patch included)</a>
1.294 david 1460: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1461: Various bugs found in X11 libraries have various side effects, almost
1462: completely denial of service in OpenBSD.
1463: (patch included)</a>
1.294 david 1464: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1465: Just like pretty much all the other unix ftp daemons
1466: on the planet, ftpd had a remote root hole in it.
1467: Luckily, ftpd was not enabled by default.
1.137 deraadt 1468: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1469: (patch included)</a>
1.294 david 1470: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1471: Mopd, very rarely used, contained some buffer overflows.
1472: (patch included)</a>
1.294 david 1473: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1474: libedit would check for a <b>.editrc</b> file in the current
1475: directory. Not known to be a real security issue, but a patch
1476: is available anyways.
1477: (patch included)</a>
1.294 david 1478: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1479: A serious bug in dhclient(8) could allow strings from a
1480: malicious dhcp server to be executed in the shell as root.
1481: (patch included)</a>
1.294 david 1482: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1483: A serious bug in isakmpd(8) policy handling wherein
1484: policy verification could be completely bypassed in isakmpd.
1485: (patch included)</a>
1.294 david 1486: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1487: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1488: should not be used, and results in security problems on
1489: other operating systems.</a>
1.294 david 1490: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1491: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1492: (patch included)</a>
1.294 david 1493: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1494: Improper use of ipf <i>keep-state</i> rules can result
1495: in firewall rules being bypassed. (patch included)</a>
1496:
1.124 deraadt 1497: </ul>
1498:
1499: <p>
1500: <li>
1.288 matthieu 1501: <a name="26"></a>
1.119 deraadt 1502:
1.294 david 1503: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1504: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1505: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1506: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1507:
1508: <p>
1509: <ul>
1.294 david 1510: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1511: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1512: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1513: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1514: Improper use of ipf <i>keep-state</i> rules can result
1515: in firewall rules being bypassed. (patch included)</a>
1.294 david 1516: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1517: xlockmore has a bug which a localhost attacker can use to gain
1518: access to the encrypted root password hash (which is normally
1.245 miod 1519: encoded using blowfish</a> (see
1.294 david 1520: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1521: crypt(3)</a>)
1.245 miod 1522: (patch included).
1.294 david 1523: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1524: Systems running with procfs enabled and mounted are
1525: vulnerable to a very tricky exploit. procfs is not
1526: mounted by default.
1527: (patch included).</a>
1.294 david 1528: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1529: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1530: thus exposing the system to a race where the aliases file
1531: did not exist.
1.119 deraadt 1532: (patch included).</a>
1.294 david 1533: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1534: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1535: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1536: A buffer overflow in the RSAREF code included in the
1537: USA version of libssl, is possibly exploitable in
1538: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1539: (patch included).<br></a>
1540: <strong>Update:</strong> Turns out that this was not exploitable
1541: in any of the software included in OpenBSD 2.6.
1.294 david 1542: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1543: Any user could change interface media configurations, resulting in
1544: a localhost denial of service attack.
1.121 deraadt 1545: (patch included).</a>
1.119 deraadt 1546: </ul>
1547:
1548: <p>
1549: <li>
1.288 matthieu 1550: <a name="25"></a>
1.106 deraadt 1551:
1.294 david 1552: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1553: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1554: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1555: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1556:
1.96 deraadt 1557: <p>
1.104 deraadt 1558: <ul>
1.294 david 1559: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1560: In cron(8), make sure argv[] is NULL terminated in the
1561: fake popen() and run sendmail as the user, not as root.
1562: (patch included).</a>
1.294 david 1563: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1564: filesystems had an overrun in their handling of uio_offset
1565: in their readdir() routines. (These filesystems are not
1566: enabled by default). (patch included).</a>
1.294 david 1567: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1568: when we execve() a new process. (patch included).</a>
1.294 david 1569: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1570: been handled by IPsec may be transmitted as cleartext.
1571: PF_KEY SA expirations may leak kernel resources.
1572: (patch included).</a>
1.294 david 1573: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1574: motd re-writing and change the find(1) to use -execdir
1575: (patch included).</a>
1.294 david 1576: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1577: users to chflags(2) or fchflags(2) on character or block devices
1578: which they may currently be the owner of (patch included).</a>
1.294 david 1579: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1580: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1581: </ul>
1582:
1.106 deraadt 1583: <p>
1584: <li>
1.288 matthieu 1585: <a name="24"></a>
1.235 miod 1586:
1.294 david 1587: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1588: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1589: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1590: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1591:
1.96 deraadt 1592: <p>
1.75 deraadt 1593: <ul>
1.294 david 1594: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1595: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1596: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1597: another kernel crash case caused by the <strong>crashme</strong>
1598: program (patch included).</a>
1.294 david 1599: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1600: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1601: (patch included).</a>
1.294 david 1602: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1603: existed in ping(8). (patch included).</a>
1.294 david 1604: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1605: the ipq, which could permit an attacker to cause a crash.
1606: (patch included).</a>
1.294 david 1607: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1608: kernel between accept(2) and select(2) could permit an attacker
1609: to hang sockets from remote.
1610: (patch included).</a>
1.294 david 1611: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1612: bog the machine excessively and cause problems.
1613: (patch included).</a>
1.294 david 1614: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1615: DDB interacted to possibly cause a crash.
1616: (patch included).</a>
1.294 david 1617: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1618: (patch included).</a>
1.294 david 1619: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1620: problem in bootpd(8). (patch included).</a>
1.294 david 1621: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1622: exploitable problem relating to environment variables in termcap
1623: and curses. (patch included).</a>
1.294 david 1624: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1625: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1626: </ul>
1627:
1.106 deraadt 1628: <p>
1629: <li>
1.288 matthieu 1630: <a name="23"></a>
1.235 miod 1631:
1.294 david 1632: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1633: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1634: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1635: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1636:
1.96 deraadt 1637: <p>
1.53 matthieu 1638: <ul>
1.294 david 1639: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1640: problem in bootpd(8). (patch included).</a>
1.294 david 1641: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1642: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1643: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1644: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1645: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1646: chpass(1) has a file descriptor leak which allows an
1647: attacker to modify /etc/master.passwd.</a>
1.294 david 1648: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1649: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1650: should not be executed with fd slots 0, 1, or 2 free.
1651: (patch included).</a>
1.294 david 1652: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1653: libraries (patches included).</a>
1.294 david 1654: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1655: processes too permissive (4th revision patch included).</a>
1.294 david 1656: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1657: of immutable and append-only file flags. (patch included).</a>
1.294 david 1658: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1659: if IPSEC is enabled (patch included).</a>
1.294 david 1660: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1661: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1662: </ul>
1.9 deraadt 1663:
1.106 deraadt 1664: <p>
1665: <li>
1.288 matthieu 1666: <a name="22"></a>
1.235 miod 1667:
1.294 david 1668: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1669: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1670: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1671: still exist in other operating systems. (The supplied patches are for
1672: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1673:
1.96 deraadt 1674: <p>
1.9 deraadt 1675: <ul>
1.294 david 1676: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1677: packets if IPSEC is enabled (patch included).</a>
1.294 david 1678: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1679: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1680: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1681: (patch included).</a>
1.294 david 1682: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1683: (patch included).</a>
1.294 david 1684: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1685: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1686: (patch included).</a>
1.294 david 1687: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1688: export (patch included).</a>
1.112 philen 1689: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1690: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1691: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1692: Acceptance.</a>
1.294 david 1693: A patch is available <a href="errata22.html#sourceroute">here</a>.
1694: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1695: flaw (patch included).</a>
1.294 david 1696: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1697: </ul>
1698:
1.106 deraadt 1699: <p>
1700: <li>
1.288 matthieu 1701: <a name="21"></a>
1.235 miod 1702:
1.294 david 1703: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1704: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1705: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1706: exist in other operating systems. (If you are running OpenBSD 2.1, we
1707: would strongly recommend an upgrade to the newest release, as this
1708: patch list only attempts at fixing the most important security
1709: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1710: security problems. Many of those problems were solved in ways which
1711: make it hard for us to provide patches).
1712:
1.96 deraadt 1713: <p>
1.52 deraadt 1714: <ul>
1.112 philen 1715: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1716: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1717: (patch included)</a>
1.112 philen 1718: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1719: </ul>
1.51 deraadt 1720:
1.106 deraadt 1721: <p>
1722: <li>
1.288 matthieu 1723: <a name="20"></a>
1.235 miod 1724:
1.294 david 1725: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1726: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1727: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1728: exist in other operating systems. (If you are running OpenBSD 2.0, we
1729: commend you for being there back in the old days!, but you're really
1730: missing out if you don't install a new version!)
1731:
1732: <p>
1733: <ul>
1.112 philen 1734: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1735: resolver (patch included)</a>
1736: <li>Many others... if people can hunt them down, please let me know
1737: and we'll put them up here.
1738: </ul>
1.51 deraadt 1739: <p>
1.106 deraadt 1740:
1.288 matthieu 1741: <a name="watching"></a>
1.294 david 1742: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1743:
1.21 deraadt 1744: Since we take a proactive stance with security, we are continually
1745: finding and fixing new security problems. Not all of these problems
1.80 espie 1746: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1747: confirmed to be exploitable; many simple bugs we fix do turn out to
1748: have security consequences we could not predict. We do not have the
1749: time resources to make these changes available in the above format.<p>
1.21 deraadt 1750:
1751: Thus there are usually minor security fixes in the current source code
1752: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1753: guarantee that these problems are of minimal impact and unproven
1.44 ian 1754: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1755: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1756:
1.45 deraadt 1757: People who are really concerned with security can do a number of
1758: things:<p>
1.21 deraadt 1759:
1760: <ul>
1761: <li>If you understand security issues, watch our
1.294 david 1762: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1763: eye out for things which appear security related. Since
1.21 deraadt 1764: exploitability is not proven for many of the fixes we make,
1765: do not expect the relevant commit message to say "SECURITY FIX!".
1766: If a problem is proven and serious, a patch will be available
1767: here very shortly after.
1.161 horacio 1768: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1769: security-announce mailing list</a> which will notify you for every
1.186 ian 1770: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1771: and instruct you on how to patch the problem.
1.21 deraadt 1772: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1773: complete system build from time to time (read /usr/src/Makefile
1774: carefully). Users can make the assumption that the current
1775: source tree always has stronger security than the previous release.
1.45 deraadt 1776: However, building your own system from source code is not trivial;
1.265 miod 1777: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1778: transition between major releases.
1.115 ericj 1779: <li>Install a binary snapshot for your
1.80 espie 1780: architecture, which are made available fairly often. For
1.29 deraadt 1781: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1782: </ul>
1783:
1.9 deraadt 1784: <p>
1.288 matthieu 1785: <a name="reporting"></a>
1.294 david 1786: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1787:
1.5 deraadt 1788: <p> If you find a new security problem, you can mail it to
1.294 david 1789: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1790: <br>
1.5 deraadt 1791: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1792: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1793:
1.107 deraadt 1794: <p>
1.288 matthieu 1795: <a name="papers"></a>
1.294 david 1796: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1797:
1798: A number of papers have been written by OpenBSD team members, about security
1799: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1800: documents are available as follows.<p>
1.107 deraadt 1801:
1802: <ul>
1.113 deraadt 1803: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1804: <a href="events.html#usenix99">Usenix 1999</a>,
1805: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1806: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1807: <a href="papers/bcrypt-paper.ps">paper</a> and
1808: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1809: <p>
1810: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1811: <a href="events.html#usenix99">Usenix 1999</a>,
1812: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1813: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1814: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1815: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1816: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1817: <a href="papers/crypt-paper.ps">paper</a> and
1818: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1819: <p>
1820: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1821: <a href="events.html#usenix99">Usenix 1999</a>,
1822: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1823: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1824: <a href="papers/strlcpy-paper.ps">paper</a> and
1825: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1826: <p>
1.118 deraadt 1827: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1828: <a href="events.html#lisa99">LISA 1999</a>,
1829: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1830: <a href="papers/authgw-paper.ps">paper</a> and
1831: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1832: <p>
1.153 jufi 1833: <li>Encrypting Virtual Memory<br>
1.294 david 1834: <a href="events.html#sec2000">Usenix Security 2000</a>,
1835: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1836: <a href="papers/swapencrypt.ps">paper</a> and
1837: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1838: <p>
1.107 deraadt 1839: </ul>
1.294 david 1840: </ul>
1.106 deraadt 1841:
1.2 deraadt 1842: <hr>
1.294 david 1843: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1844: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1845: <br>
1.388 ! miod 1846: <small>$OpenBSD: security.html,v 1.387 2011/05/01 15:24:14 miod Exp $</small>
1.1 deraadt 1847:
1.24 deraadt 1848: </body>
1849: </html>
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