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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.387 miod 57: <a href="#34">3.4</a>,
1.388 miod 58: <a href="#35">3.5</a>,
1.365 deraadt 59: <br>
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 deraadt 67: <a href="#43">4.3</a>,
1.377 tobias 68: <a href="#44">4.4</a>,
1.378 jasper 69: <a href="#45">4.5</a>,
1.385 jasper 70: <a href="#46">4.6</a>,
1.387 miod 71: <a href="#47">4.7</a>,
72: <a href="#48">4.8</a>,
1.390 sthen 73: <a href="#49">4.9</a>,
74: <a href="#50">5.0</a>,
75: <a href="#51">5.1</a>.
1.114 philen 76: </td>
77: </tr>
78: </table>
1.56 deraadt 79: <hr>
80:
1.294 david 81: <a name="goals"></a>
1.278 deraadt 82: <ul>
1.294 david 83: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 84:
1.14 deraadt 85: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 86: ONE in the industry for security (if we are not already there). Our
87: open software development model permits us to take a more
88: uncompromising view towards increased security than Sun, SGI, IBM, HP,
89: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 90: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 91: cryptography</a>, we are able to take cryptographic approaches towards
92: fixing security problems.<p>
1.18 deraadt 93:
1.288 matthieu 94: <a name="disclosure"></a>
1.294 david 95: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 96:
1.45 deraadt 97: Like many readers of the
1.196 jufi 98: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 99: BUGTRAQ mailing list</a>,
1.106 deraadt 100: we believe in full disclosure of security problems. In the
101: operating system arena, we were probably the first to embrace
102: the concept. Many vendors, even of free software, still try
103: to hide issues from their users.<p>
104:
105: Security information moves very fast in cracker circles. On the other
106: hand, our experience is that coding and releasing of proper security
107: fixes typically requires about an hour of work -- very fast fix
108: turnaround is possible. Thus we think that full disclosure helps the
109: people who really care about security.<p>
110:
1.288 matthieu 111: <a name="process"></a>
1.294 david 112: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 113:
1.12 deraadt 114: Our security auditing team typically has between six and twelve
1.45 deraadt 115: members who continue to search for and fix new security holes. We
116: have been auditing since the summer of 1996. The process we follow to
117: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 118: every critical software component. We are not so much looking for
119: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 120: years later someone discovers the problem used to be a security
1.106 deraadt 121: issue, and we fixed it because it was just a bug, well, all the
122: better. Flaws have been found in just about every area of the system.
123: Entire new classes of security problems have been found during our
124: audit, and often source code which had been audited earlier needs
125: re-auditing with these new flaws in mind. Code often gets audited
126: multiple times, and by multiple people with different auditing
127: skills.<p>
1.12 deraadt 128:
1.94 deraadt 129: Some members of our security auditing team worked for Secure Networks,
130: the company that made the industry's premier network security scanning
131: software package Ballista (Secure Networks got purchased by Network
132: Associates, Ballista got renamed to Cybercop Scanner, and well...)
133: That company did a lot of security research, and thus fit in well
1.106 deraadt 134: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
135: colours since day 1.<p>
1.31 deraadt 136:
1.34 deraadt 137: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 138: In most cases we have found that the determination of exploitability
139: is not an issue. During our ongoing auditing process we find many
140: bugs, and endeavor to fix them even though exploitability is not
141: proven. We fix the bug, and we move on to find other bugs to fix. We
142: have fixed many simple and obvious careless programming errors in code
143: and only months later discovered that the problems were in fact
144: exploitable. (Or, more likely someone on
1.197 jufi 145: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 146: would report that other operating systems were vulnerable to a `newly
147: discovered problem', and then it would be discovered that OpenBSD had
148: been fixed in a previous release). In other cases we have been saved
149: from full exploitability of complex step-by-step attacks because we
150: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 151: managed such a success is the lpd advisory that Secure Networks put out.
152: <p>
1.29 deraadt 153:
1.288 matthieu 154: <a name="newtech"></a>
1.294 david 155: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 156:
157: As we audit source code, we often invent new ways of solving problems.
158: Sometimes these ideas have been used before in some random application
159: written somewhere, but perhaps not taken to the degree that we do.
160: <p>
161:
162: <ul>
163: <li>strlcpy() and strlcat()
164: <li>Memory protection purify
165: <ul>
166: <li>W^X
167: <li>.rodata segment
168: <li>Guard pages
169: <li>Randomized malloc()
170: <li>Randomized mmap()
171: <li>atexit() and stdio protection
172: </ul>
1.295 otto 173: <li>Privilege separation
1.278 deraadt 174: <li>Privilege revocation
175: <li>Chroot jailing
176: <li>New uids
177: <li>ProPolice
178: <li>... and others
179: </ul>
180: <p>
181:
1.294 david 182: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 183:
1.45 deraadt 184: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 185: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 186: commonplace in security forums like
1.197 jufi 187: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 188:
1.45 deraadt 189: The most intense part of our security auditing happened immediately
1.80 espie 190: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 191: over the last third of 1996 and first half of 1997. Thousands (yes,
192: thousands) of security issues were fixed rapidly over this year-long
193: period; bugs like the standard buffer overflows, protocol
194: implementation weaknesses, information gathering, and filesystem
195: races. Hence most of the security problems that we encountered were
196: fixed before our 2.1 release, and then a far smaller number needed
197: fixing for our 2.2 release. We do not find as many problems anymore,
198: it is simply a case of diminishing returns. Recently the security
199: problems we find and fix tend to be significantly more obscure or
200: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 201:
1.35 deraadt 202: <ul>
1.45 deraadt 203: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 204: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 205: to search for more complicated exploits, so we will too.
206: <li>Finding and fixing subtle flaws in complicated software is
207: a lot of fun.
1.35 deraadt 208: </ul>
1.106 deraadt 209: <p>
1.15 deraadt 210:
1.14 deraadt 211: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 212: to find and fix new security flaws.<p>
1.12 deraadt 213:
1.288 matthieu 214: <a name="default"></a>
1.294 david 215: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 216:
217: To ensure that novice users of OpenBSD do not need to become security
218: experts overnight (a viewpoint which other vendors seem to have), we
219: ship the operating system in a Secure by Default mode. All non-essential
220: services are disabled. As the user/administrator becomes more familiar
221: with the system, he will discover that he has to enable daemons and other
222: parts of the system. During the process of learning how to enable a new
223: service, the novice is more likely to learn of security considerations.<p>
224:
225: This is in stark contrast to the increasing number of systems that
226: ship with NFS, mountd, web servers, and various other services enabled
227: by default, creating instantaneous security problems for their users
228: within minutes after their first install.<p>
229:
1.288 matthieu 230: <a name="crypto"></a>
1.294 david 231: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 232:
233: And of course, since the OpenBSD project is based in Canada, it is possible
234: for us to integrate cryptography. For more information, read the page
1.116 deraadt 235: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 236:
1.294 david 237: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 238:
239: <li>
1.390 sthen 240: <a name="51"></a>
241:
242: <h3><font color="#e00000">OpenBSD 5.1 Security Advisories</font></h3>
243: These are the OpenBSD 5.1 advisories -- all these problems are solved
244: in <a href=anoncvs.html>OpenBSD current</a> and the
245: <a href=stable.html>patch branch</a>.
246:
247: <p>
248: <ul>
249: None yet!
250: </ul>
251:
252: <li>
1.388 miod 253: <a name="50"></a>
254:
255: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
256: These are the OpenBSD 5.0 advisories -- all these problems are solved
257: in <a href=anoncvs.html>OpenBSD current</a> and the
258: <a href=stable.html>patch branch</a>.
259:
260: <p>
261: <ul>
262: None yet!
263: </ul>
264:
1.391 tobias 265: <p>
266: OpenBSD 4.9 and earlier releases are not supported anymore. The following
267: paragraphs only list advisories issued while they were maintained; these
268: releases are likely to be affected by the advisories for more recent releases.
269: <br>
270:
1.388 miod 271: <li>
1.387 miod 272: <a name="49"></a>
273:
274: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
275: These are the OpenBSD 4.9 advisories -- all these problems are solved
276: in <a href=anoncvs.html>OpenBSD current</a> and the
277: <a href=stable.html>patch branch</a>.
278:
279: <p>
280: <ul>
281: None yet!
282: </ul>
283:
284: <li>
285: <a name="48"></a>
286:
287: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
288: These are the OpenBSD 4.8 advisories -- all these problems are solved
289: in <a href=anoncvs.html>OpenBSD current</a> and the
290: <a href=stable.html>patch branch</a>.
291:
292: <p>
293: <ul>
294: <li><a href="errata48.html#009_pf">February 16, 2011:
295: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
296: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
297: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
298: prefixes "10.1.1.1/30") are not affected.</a>
299: <li><a href="errata48.html#008_openssl">February 11, 2011:
300: An incorrectly formatted ClientHello handshake message could cause
301: OpenSSL to parse past the end of the message. An attacker could use
302: this flaw to trigger an invalid memory access, causing a crash of an
303: application linked to OpenSSL. As well, certain applications may expose
304: the contents of parsed OCSP extensions, specifically the OCSP nonce
305: extension.
306: <br>
307: Applications are only affected if they act as a server and call
308: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
309: that nothing in the base OS uses this. Apache httpd started using this
310: in v2.3.3; this is newer than the version in ports.</a>
311: <li><a href="errata48.html#005_pf">December 17, 2010:
312: Insufficent initialization of the pf rule structure in the ioctl
313: handler may allow userland to modify kernel memory. By default root
314: privileges are needed to add or modify pf rules.</a>
315: </ul>
316:
317: <li>
1.385 jasper 318: <a name="47"></a>
319:
320: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
321: These are the OpenBSD 4.7 advisories -- all these problems are solved
322: in <a href=anoncvs.html>OpenBSD current</a> and the
323: <a href=stable.html>patch branch</a>.
324:
325: <p>
326: <ul>
1.387 miod 327: <li><a href="errata47.html#013_pf">February 16, 2011:
328: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
329: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
330: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
331: prefixes "10.1.1.1/30") are not affected.</a>
332: <li><a href="errata47.html#012_openssl">February 11, 2011:
333: An incorrectly formatted ClientHello handshake message could cause
334: OpenSSL to parse past the end of the message. An attacker could use
335: this flaw to trigger an invalid memory access, causing a crash of an
336: application linked to OpenSSL. As well, certain applications may expose
337: the contents of parsed OCSP extensions, specifically the OCSP nonce
338: extension.
339: <br>
340: Applications are only affected if they act as a server and call
341: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
342: that nothing in the base OS uses this. Apache httpd started using this
343: in v2.3.3; this is newer than the version in ports.</a>
344: <li><a href="errata47.html#009_pf">December 17, 2010:
345: Insufficent initialization of the pf rule structure in the ioctl
346: handler may allow userland to modify kernel memory. By default root
347: privileges are needed to add or modify pf rules.</a>
348: <li><a href="errata47.html#004_pfsync">April 23, 2010:
349: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 350: <li><a href="errata47.html#003_openssl">April 14, 2010:
351: In TLS connections, certain incorrectly formatted records can
352: cause an OpenSSL client or server to crash due to a read
1.392 ! tobias 353: attempt at NULL.</a>
1.385 jasper 354: </ul>
355:
356: <li>
1.378 jasper 357: <a name="46"></a>
358:
359: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
360: These are the OpenBSD 4.6 advisories -- all these problems are solved
361: in <a href=anoncvs.html>OpenBSD current</a> and the
362: <a href=stable.html>patch branch</a>.
363:
364: <p>
365: <ul>
1.385 jasper 366: <li><a href="errata46.html#010_openssl">April 14, 2010:
367: In TLS connections, certain incorrectly formatted records can
368: cause an OpenSSL client or server to crash due to a read
1.392 ! tobias 369: attempt at NULL.</a>
1.384 jasper 370: <li><a href="errata46.html#006_openssl">March 12, 2010:
371: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 ! tobias 372: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 373: <li><a href="errata46.html#004_openssl">November 26, 2009:
374: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 ! tobias 375: related to renegotiation.</a>
1.378 jasper 376: </ul>
1.382 tobias 377:
378: <li>
1.373 djm 379: <a name="45"></a>
380:
381: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
382: These are the OpenBSD 4.5 advisories -- all these problems are solved
383: in <a href=anoncvs.html>OpenBSD current</a> and the
384: <a href=stable.html>patch branch</a>.
385:
386: <p>
387: <ul>
1.385 jasper 388: <li><a href="errata45.html#016_openssl">April 14, 2010:
389: In TLS connections, certain incorrectly formatted records can
390: cause an OpenSSL client or server to crash due to a read
1.392 ! tobias 391: attempt at NULL.</a>
1.385 jasper 392: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 393: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 ! tobias 394: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 395: <li><a href="errata45.html#010_openssl">November 26, 2009:
396: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 ! tobias 397: related to renegotiation.</a>
1.373 djm 398: </ul>
399:
400: <li>
1.365 deraadt 401: <a name="44"></a>
402:
403: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
404: These are the OpenBSD 4.4 advisories -- all these problems are solved
405: in <a href=anoncvs.html>OpenBSD current</a> and the
406: <a href=stable.html>patch branch</a>.
407:
408: <p>
409: <ul>
1.372 millert 410: <li><a href="errata44.html#011_sudo">February 22, 2009:
411: sudo(8) may allow a user listed in sudoers to run a command
412: as a different user than their access rule specifies when a Unix
413: group is used in the RunAs portion of the rule.</a>
1.370 djm 414: <li><a href="errata44.html#008_bind">January 15, 2009:
415: named(8) suffered from a similar logic error that may allow
416: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 417: <li><a href="errata44.html#007_openssl">January 9, 2009:
418: OpenSSL suffered from some logic errors that allowed bypass
419: of DSA/ECDSA certificate validation.</a>
1.367 brad 420: <li><a href="errata44.html#001_ndp">November 2, 2008:
421: The Neighbor Discovery Protocol (ndp) did not correctly verify
422: neighbor solicitation requests maybe allowing a nearby attacker
423: to intercept traffic.</a>
1.365 deraadt 424: </ul>
425:
426: <li>
1.357 brad 427: <a name="43"></a>
428:
429: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
430: These are the OpenBSD 4.3 advisories -- all these problems are solved
431: in <a href=anoncvs.html>OpenBSD current</a> and the
432: <a href=stable.html>patch branch</a>.
433:
434: <p>
435: <ul>
1.372 millert 436: <li><a href="errata43.html#011_sudo">February 22, 2009:
437: sudo(8) may allow a user listed in sudoers to run a command
438: as a different user than their access rule specifies when a Unix
439: group is used in the RunAs portion of the rule.</a>
1.370 djm 440: <li><a href="errata43.html#008_bind">January 15, 2009:
441: named(8) suffered from a similar logic error that may allow
442: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 443: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 444: OpenSSL suffered from some logic errors that allowed bypass
445: of DSA/ECDSA certificate validation.</a>
1.382 tobias 446: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 447: The Neighbor Discovery Protocol (ndp) did not correctly verify
448: neighbor solicitation requests maybe allowing a nearby attacker
449: to intercept traffic.</a>
1.362 brad 450: <li><a href="errata43.html#004_bind">July 23, 2008:
451: A vulnerability has been found with BIND.</a>
1.361 brad 452: <li><a href="errata43.html#003_xorg">July 15, 2008:
453: Multiple vulnerabilities in X.Org.</a>
1.359 brad 454: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 455: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 456: <li><a href="errata43.html#001_openssh">March 30, 2008:
457: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 458: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 459: </ul>
460:
461: <li>
1.348 merdely 462: <a name="42"></a>
463: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
464: These are the OpenBSD 4.2 advisories -- all these problems are solved
465: in <a href=anoncvs.html>OpenBSD current</a> and the
466: <a href=stable.html>patch branch</a>.
467:
468: <p>
469: <ul>
1.364 tobias 470: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 471: The Neighbor Discovery Protocol (ndp) did not correctly verify
472: neighbor solicitation requests maybe allowing a nearby attacker
473: to intercept traffic.</a>
1.362 brad 474: <li><a href="errata42.html#013_bind">July 23, 2008:
475: A vulnerability has been found with BIND.</a>
1.361 brad 476: <li><a href="errata42.html#012_xorg2">July 15, 2008:
477: Multiple vulnerabilities in X.Org.</a>
1.359 brad 478: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 479: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 480: <li><a href="errata42.html#010_openssh">March 30, 2008:
481: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 482: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 483: <li><a href="errata42.html#009_ppp">March 7, 2008:
484: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 485: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
486: Multiple vulnerabilities in X.Org.</a>
1.351 okan 487: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
488: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 489: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 490: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 491: </ul>
492:
493: <li>
1.346 matthieu 494: <a name="41"></a>
495:
496: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
497: These are the OpenBSD 4.1 advisories -- all these problems are solved
498: in <a href=anoncvs.html>OpenBSD current</a> and the
499: <a href=stable.html>patch branch</a>.
500:
501: <p>
502: <ul>
1.359 brad 503: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 504: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 505: <li><a href="errata41.html#015_openssh">March 30, 2008:
506: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 507: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 508: <li><a href="errata41.html#014_ppp">March 7, 2008:
509: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 510: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
511: Multiple vulnerabilities in X.Org.</a>
512: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
513: The SSL_get_shared_ciphers() function in OpenSSL contains
514: an off-by-one overflow.</a>
1.350 deraadt 515: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 516: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 517: <li><a href="errata41.html#009_file">Jul 9, 2007:
518: Fix possible heap overflow in file(1).</a>
1.346 matthieu 519: <li><a href="errata41.html#005_route6">Apr 27, 2007:
520: IPv6 type 0 route headers can be used to mount a DoS attack
521: against hosts and networks.</a>
522: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
523: Multiple vulnerabilities in X.Org.</a>
524: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
525: Incorrect mbuf handling for ICMP6 packets.</a>
526: </ul>
527:
528: <li>
1.334 brad 529: <a name="40"></a>
530: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
531: These are the OpenBSD 4.0 advisories -- all these problems are solved
532: in <a href=anoncvs.html>OpenBSD current</a> and the
533: <a href=stable.html>patch branch</a>.
534:
535: <p>
536: <ul>
1.382 tobias 537: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
538: The SSL_get_shared_ciphers() function in OpenSSL contains an
539: off-by-one overflow.</a>
1.350 deraadt 540: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 541: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 542: <li><a href="errata40.html#015_file">Jul 9, 2007:
543: Fix possible heap overflow in file(1).</a>
1.343 deraadt 544: <li><a href="errata40.html#012_route6">Apr 23, 2007:
545: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 546: against hosts and networks.</a>
1.342 mbalmer 547: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
548: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 549: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
550: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 551: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 552: Insufficient validation in vga(4) may allow an attacker to gain
553: root privileges on some i386 systems.</a>
1.339 deraadt 554: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 555: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 556: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 557: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
558: found by Chris Evans.</a>
1.339 deraadt 559: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 560: Several problems have been found in OpenSSL.</a>
1.339 deraadt 561: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 562: httpd(8) does not sanitize the Expect header from an HTTP request
563: when it is reflected back in an error message, which might allow
564: cross-site scripting (XSS) style attacks.</a>
565: </ul>
566:
567: <li>
1.321 brad 568: <a name="39"></a>
569:
570: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
571: These are the OpenBSD 3.9 advisories -- all these problems are solved
572: in <a href=anoncvs.html>OpenBSD current</a> and the
573: <a href=stable.html>patch branch</a>.
574:
575: <p>
576: <ul>
1.343 deraadt 577: <li><a href="errata39.html#022_route6">Apr 23, 2007:
578: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 579: against hosts and networks.</a>
1.342 mbalmer 580: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
581: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 582: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
583: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 584: <li><a href="errata39.html#agp">Jan 3, 2007:
585: Insufficient validation in vga(4) may allow an attacker to gain
586: root privileges on some i386 systems.</a>
1.336 brad 587: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 588: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 589: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 590: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 591: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 592: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 593: found by Chris Evans.</a>
1.333 deraadt 594: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 595: Several problems have been found in OpenSSL.</a>
1.333 deraadt 596: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 597: httpd(8) does not sanitize the Expect header from an HTTP request
598: when it is reflected back in an error message, which might allow
599: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 600: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 601: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
602: possible for an attacker to construct an invalid signature which
603: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 604: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 605: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 606: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 607: Due to the failure to correctly validate LCP configuration option
608: lengths, it is possible for an attacker to send LCP packets via an
609: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 610: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 611: A problem in isakmpd(8) caused IPsec to run partly without replay
612: protection.</a>
1.333 deraadt 613: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 614: It is possible to cause the kernel to panic when more than the default
615: number of sempahores have been allocated.</a>
1.333 deraadt 616: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 617: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
618: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
619: option.</a>
1.333 deraadt 620: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 621: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 622: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 623: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
624: overflow.</a>
1.333 deraadt 625: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 626: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 627: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 628: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 629: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 630: A race condition has been reported to exist in the handling by sendmail
631: of asynchronous signals.</a>
632: </ul>
633:
634: <li>
1.318 deraadt 635: <a name="38"></a>
636:
637: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
638: These are the OpenBSD 3.8 advisories -- all these problems are solved
639: in <a href=anoncvs.html>OpenBSD current</a> and the
640: <a href=stable.html>patch branch</a>.
641:
642: <p>
643: <ul>
1.332 brad 644: <li><a href="errata38.html#ssh2">Oct 12, 2006:
645: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 646: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 647: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 648: found by Chris Evans.</a>
649: <li><a href="errata38.html#openssl2">Oct 7, 2006:
650: Several problems have been found in OpenSSL.</a>
651: <li><a href="errata38.html#httpd2">Oct 7, 2006:
652: httpd(8) does not sanitize the Expect header from an HTTP request
653: when it is reflected back in an error message, which might allow
654: cross-site scripting (XSS) style attacks.</a>
1.329 brad 655: <li><a href="errata38.html#openssl">Sep 8, 2006:
656: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
657: possible for an attacker to construct an invalid signature which
658: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 659: <li><a href="errata38.html#bind">Sep 8, 2006:
660: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 661: <li><a href="errata38.html#sppp">Sep 2, 2006:
662: Due to the failure to correctly validate LCP configuration option
663: lengths, it is possible for an attacker to send LCP packets via an
664: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 665: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
666: A problem in isakmpd(8) caused IPsec to run partly without replay
667: protection.</a>
668: <li><a href="errata38.html#sem">Aug 25, 2006:
669: It is possible to cause the kernel to panic when more than the default
670: number of sempahores have been allocated.</a>
671: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
672: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
673: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
674: option.</a>
675: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
676: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 677: <li><a href="errata38.html#httpd">Jul 30, 2006:
678: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
679: overflow.</a>
1.324 brad 680: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
681: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 682: <li><a href="errata38.html#xorg">May 2, 2006:
683: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 684: <li><a href="errata38.html#sendmail">Mar 25, 2006:
685: A race condition has been reported to exist in the handling by sendmail
686: of asynchronous signals.</a>
687: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 688: Josh Bressers has reported a weakness in OpenSSH caused due to the
689: insecure use of the system(3) function in scp(1) when performing copy
690: operations using filenames that are supplied by the user from the
691: command line.</a>
1.321 brad 692: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 693: Do not allow users to trick suid programs into re-opening files via
694: /dev/fd.</a>
1.321 brad 695: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 696: A buffer overflow has been found in the Perl interpreter with the
697: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 698: </ul>
699:
700: <li>
1.312 david 701: <a name="37"></a>
702:
703: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
704: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 705: in <a href="anoncvs.html">OpenBSD current</a>. The
706: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
707: you should update your machine.
1.312 david 708:
709: <p>
710: <ul>
1.322 brad 711: <li><a href="errata37.html#xorg">May 2, 2006:
712: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 713: <li><a href="errata37.html#sendmail">Mar 25, 2006:
714: A race condition has been reported to exist in the handling by sendmail
715: of asynchronous signals.</a>
1.320 brad 716: <li><a href="errata37.html#ssh">Feb 12, 2006:
717: Josh Bressers has reported a weakness in OpenSSH caused due to the
718: insecure use of the system(3) function in scp(1) when performing copy
719: operations using filenames that are supplied by the user from the
720: command line.</a>
1.319 brad 721: <li><a href="errata37.html#fd">Jan 5, 2006:
722: Do not allow users to trick suid programs into re-opening files via
723: /dev/fd.</a>
724: <li><a href="errata37.html#perl">Jan 5, 2006:
725: A buffer overflow has been found in the Perl interpreter with the
726: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 727: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 728: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 729: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 730: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 731: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 732: Fix a race condition in sudo(8) that could allow a user
1.315 millert 733: to run arbitrary commands.</a>
1.318 deraadt 734: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 735: Fix a buffer overflow, memory leaks, and NULL pointer
736: dereference in cvs(1).</a>
1.312 david 737: </ul>
738:
739: <li>
1.301 miod 740: <a name="36"></a>
741:
742: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
743: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 744: in <a href="anoncvs.html">OpenBSD current</a>. The
745: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
746: you should update your machine.
1.301 miod 747:
748: <p>
1.302 markus 749: <ul>
1.317 millert 750: <li><a href="errata36.html#libz2">Jul 21, 2005:
751: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 752: <li><a href="errata36.html#libz">Jul 6, 2005:
753: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 754: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 755: Fix a race condition in sudo(8) that could allow a user
1.315 millert 756: to run arbitrary commands.</a>
1.311 deraadt 757: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 758: Fix a buffer overflow, memory leaks, and NULL pointer
759: dereference in cvs(1).</a>
1.311 deraadt 760: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 761: Due to buffer overflows in telnet(1), a malicious
762: server or man-in-the-middle attack could allow
763: execution of arbitrary code with the privileges of
764: the user invoking telnet(1).</a>
1.311 deraadt 765: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 766: More stringent checking should be done in the copy(9)
767: functions to prevent their misuse.</a>
1.311 deraadt 768: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 769: More stringent checking should be done in the copy(9)
770: functions to prevent their misuse.</a>
1.311 deraadt 771: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 772: httpd(8)'s mod_include module fails to properly validate
773: the length of user supplied tag strings prior to copying
1.305 brad 774: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 775: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 776: On systems running isakmpd(8) it is possible for a local
777: user to cause kernel memory corruption and system panic by
1.303 markus 778: setting ipsec(4) credentials on a socket.</a>
1.302 markus 779: </ul>
1.301 miod 780:
781: <li>
1.288 matthieu 782: <a name="35"></a>
1.279 deraadt 783:
1.294 david 784: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 785: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 786: in <a href="anoncvs.html">OpenBSD current</a>. The
787: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
788: you should update your machine.
1.279 deraadt 789:
790: <p>
791: <ul>
1.310 brad 792: <li><a href="errata35.html#cvs4">Apr 28, 2005:
793: Fix a buffer overflow, memory leaks, and NULL pointer
794: dereference in cvs(1).</a>
1.309 brad 795: <li><a href="errata35.html#telnet">Mar 30, 2005:
796: Due to buffer overflows in telnet(1), a malicious
797: server or man-in-the-middle attack could allow
798: execution of arbitrary code with the privileges of
799: the user invoking telnet(1).</a>
1.308 brad 800: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 801: More stringent checking should be done in the copy(9)
802: functions to prevent their misuse.</a>
1.306 brad 803: <li><a href="errata35.html#locore">Feb 28, 2005:
804: More stringent checking should be done in the copy(9)
805: functions to prevent their misuse.</a>
1.304 brad 806: <li><a href="errata35.html#httpd3">Jan 12, 2005:
807: httpd(8)'s mod_include module fails to properly validate
808: the length of user supplied tag strings prior to copying
1.305 brad 809: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 810: <li><a href="errata35.html#pfkey">Dec 14, 2004:
811: On systems running isakmpd(8) it is possible for a local
812: user to cause kernel memory corruption and system panic by
1.303 markus 813: setting ipsec(4) credentials on a socket.</a>
1.301 miod 814: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 815: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 816: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 817: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 818: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 819: httpd(8)'s mod_rewrite module can be made to write one zero byte in
820: an arbitrary memory position outside of a char array, causing a DoS
821: or possibly buffer overflows.</a>
1.301 miod 822: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 823: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 824: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 825: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 826: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 827: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 828: Multiple remote vulnerabilities have been found in the cvs(1)
829: server which can be used by CVS clients to crash or execute
1.293 brad 830: arbitrary code on the server.</a>
1.301 miod 831: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 832: kdc(8) performs inadequate checking of request fields, leading
833: to the possibility of principal impersonation from other
834: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 835: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 836: xdm(1) ignores the requestPort resource and creates a
1.293 brad 837: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 838: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 839: A buffer overflow in the cvs(1) server has been found,
840: which can be used by CVS clients to execute arbitrary code on
1.293 brad 841: the server.</a>
1.301 miod 842: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 843: Integer overflow problems were found in procfs, allowing
1.293 brad 844: reading of arbitrary kernel memory.</a>
1.301 miod 845: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 846: Pathname validation problems have been found in cvs(1),
847: allowing clients and servers access to files outside the
1.293 brad 848: repository or local CVS tree.</a>
1.279 deraadt 849: </ul>
850:
851: <p>
852: <li>
1.288 matthieu 853: <a name="34"></a>
1.261 david 854:
1.294 david 855: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 856: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 857: in <a href="anoncvs.html">OpenBSD current</a>. The
858: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
859: you should update your machine.
1.261 david 860: <p>
861: <ul>
1.302 markus 862: <li><a href="errata34.html#pfkey">Dec 14, 2004:
863: On systems running isakmpd(8) it is possible for a local
864: user to cause kernel memory corruption and system panic by
1.303 markus 865: setting ipsec(4) credentials on a socket.</a>
1.298 brad 866: <li><a href="errata34.html#xpm">Sep 16, 2004:
867: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 868: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
869: httpd(8)'s mod_rewrite module can be made to write one zero byte in
870: an arbitrary memory position outside of a char array, causing a DoS
871: or possibly buffer overflows.</a>
1.294 david 872: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 873: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 874: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 875: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 876: an attacker can delete IPsec tunnels at will.</a>
1.294 david 877: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 878: Multiple remote vulnerabilities have been found in the cvs(1)
879: server which can be used by CVS clients to crash or execute
1.293 brad 880: arbitrary code on the server.</a>
1.294 david 881: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 882: kdc(8) performs inadequate checking of request fields, leading
883: to the possibility of principal impersonation from other
884: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 885: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 886: A buffer overflow in the cvs(1) server has been found,
887: which can be used by CVS clients to execute arbitrary code on
888: the server.</a>
1.294 david 889: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 890: Integer overflow problems were found in procfs, allowing
891: reading of arbitrary kernel memory.</a>
1.294 david 892: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 893: Pathname validation problems have been found in cvs(1),
894: allowing clients and servers access to files outside the
895: repository or local CVS tree.</a>
1.294 david 896: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 897: A missing check for a NULL-pointer dereference may allow a
1.281 otto 898: remote attacker to crash applications using OpenSSL.</a>
1.294 david 899: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 900: Defects in the payload validation and processing functions of
901: isakmpd have been discovered. An attacker could send malformed
902: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 903: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 904: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
905: access module, using IP addresses without a netmask on big endian
906: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 907: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 908: An IPv6 MTU handling problem exists that could be used by an
909: attacker to cause a denial of service attack.</a>
1.294 david 910: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 911: A reference counting bug in shmat(2) could be used to write to
912: kernel memory under certain circumstances.</a>
1.294 david 913: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 914: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 915: by Thomas Walpuski.</a>
1.294 david 916: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 917: It may be possible for a local user to overrun the stack in
918: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 919: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 920: The use of certain ASN.1 encodings or malformed public keys may
921: allow an attacker to mount a denial of service attack against
922: applications linked with ssl(3).</a>
1.261 david 923: </ul>
924:
925: <li>
1.288 matthieu 926: <a name="33"></a>
1.246 deraadt 927:
1.294 david 928: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 929: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 930: in <a href="anoncvs.html">OpenBSD current</a>. The
931: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 932: you should update your machine.
1.246 deraadt 933: <p>
934: <ul>
1.294 david 935: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 936: Pathname validation problems have been found in cvs(1),
937: allowing clients and servers access to files outside the
938: repository or local CVS tree.</a>
1.294 david 939: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 940: A missing check for a NULL-pointer dereference may allow a
1.281 otto 941: remote attacker to crash applications using OpenSSL.</a>
1.294 david 942: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 943: Defects in the payload validation and processing functions of
944: isakmpd have been discovered. An attacker could send malformed
945: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 946: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 947: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
948: access module, using IP addresses without a netmask on big endian
949: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 950: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 951: An IPv6 MTU handling problem exists that could be used by an
952: attacker to cause a denial of service attack.</a>
1.294 david 953: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 954: A reference counting bug in shmat(2) could be used to write to
955: kernel memory under certain circumstances.</a>
1.294 david 956: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 957: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 958: by Thomas Walpuski.</a>
1.294 david 959: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 960: It may be possible for a local user to execute arbitrary code
961: resulting in escalation of privileges due to a stack overrun
962: in compat_ibcs2(8).</a>
1.294 david 963: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 964: The use of certain ASN.1 encodings or malformed public keys may
965: allow an attacker to mount a denial of service attack against
966: applications linked with ssl(3).</a>
1.294 david 967: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 968: Access of freed memory in pf(4) could be used to
1.260 margarid 969: remotely panic a machine using scrub rules.</a>
1.294 david 970: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 971: A buffer overflow in the address parsing in
972: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 973: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 974: OpenSSH versions prior to 3.7 contains a buffer management error
975: that is potentially exploitable.</a>
1.294 david 976: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 977: Root may be able to reduce the security level by taking advantage of
978: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 979: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 980: An improper bounds check in the kernel may allow a local user
981: to panic the kernel.</a>
1.294 david 982: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 983: An off-by-one error exists in the C library function realpath(3)
984: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 985: </ul>
986:
1.265 miod 987:
1.247 david 988: <p>
1.246 deraadt 989: <li>
1.288 matthieu 990: <a name="32"></a>
1.224 deraadt 991:
1.294 david 992: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 993: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 994: in <a href="anoncvs.html">OpenBSD current</a>. The
995: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 996: you should update your machine.
1.224 deraadt 997: <p>
998: <ul>
1.294 david 999: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 1000: The use of certain ASN.1 encodings or malformed public keys may
1001: allow an attacker to mount a denial of service attack against
1002: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 1003: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 1004: Access of freed memory in pf(4) could be used to
1.260 margarid 1005: remotely panic a machine using scrub rules.</a>
1.294 david 1006: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 1007: A buffer overflow in the address parsing in
1008: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1009: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 1010: OpenSSH versions prior to 3.7 contains a buffer management error
1011: that is potentially exploitable.</a>
1.294 david 1012: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 1013: Fix for a potential security issue in
1014: sendmail(8) with respect to DNS maps.</a>
1.294 david 1015: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1016: An off-by-one error exists in the C library function realpath(3)
1017: may allow an attacker to gain escalated privileges.</a>
1.294 david 1018: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1019: A buffer overflow in the address parsing in
1020: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1021: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1022: A cryptographic weaknesses in the Kerberos v4 protocol can be
1023: exploited on Kerberos v5 as well.</a>
1.294 david 1024: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1025: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1026: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1027: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1028: Various SSL and TLS operations in OpenSSL are vulnerable to
1029: timing attacks.</a>
1.294 david 1030: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1031: A buffer overflow in lprm(1) may allow an attacker to elevate
1.392 ! tobias 1032: privileges to user daemon.</a>
1.294 david 1033: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1034: A buffer overflow in the envelope comments processing in
1035: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1036: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1037: httpd(8) leaks file inode numbers via ETag header as well as
1038: child PIDs in multipart MIME boundary generation. This could
1039: lead, for example, to NFS exploitation because it uses inode
1040: numbers as part of the file handle.</a>
1.294 david 1041: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1042: In ssl(8) an information leak can occur via timing by performing
1043: a MAC computation even if incorrect block cipher padding has
1044: been found, this is a countermeasure. Also, check for negative
1045: sizes, in allocation routines.</a>
1.294 david 1046: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1047: A double free exists in cvs(1) that could lead to privilege
1048: escalation for cvs configurations where the cvs command is
1.233 margarid 1049: run as a privileged user.</a>
1.294 david 1050: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1051: A buffer overflow exists in named(8) that could lead to a
1052: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1053: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1054: A logic error in the pool kernel memory allocator could cause
1055: memory corruption in low-memory situations, causing the system
1056: to crash.</a>
1.294 david 1057: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1058: An attacker can bypass smrsh(8)'s restrictions and execute
1059: arbitrary commands with the privileges of his own account.</a>
1.294 david 1060: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1061: Network bridges running pf with scrubbing enabled could cause
1062: mbuf corruption, causing the system to crash.</a>
1.294 david 1063: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1064: A buffer overflow can occur in the kadmind(8) daemon, leading
1065: to possible remote crash or exploit.</a>
1.224 deraadt 1066: </ul>
1067:
1.227 miod 1068: <p>
1069: <li>
1.288 matthieu 1070: <a name="31"></a>
1.203 deraadt 1071:
1.294 david 1072: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1073: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1074: in <a href="anoncvs.html">OpenBSD current</a>. The
1075: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1076: you should update your machine.
1.203 deraadt 1077:
1078: <p>
1079: <ul>
1.294 david 1080: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1081: A buffer overflow in the address parsing in
1082: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1083: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1084: A cryptographic weaknesses in the Kerberos v4 protocol can be
1085: exploited on Kerberos v5 as well.</a>
1.294 david 1086: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1087: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1088: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1089: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1090: Various SSL and TLS operations in OpenSSL are vulnerable to
1091: timing attacks.</a>
1.294 david 1092: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1093: A buffer overflow in lprm(1) may allow an attacker to gain
1094: root privileges.</a>
1.294 david 1095: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1096: A buffer overflow in the envelope comments processing in
1097: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1098: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1099: In ssl(8) an information leak can occur via timing by performing
1100: a MAC computation even if incorrect block cipher padding has
1101: been found, this is a countermeasure. Also, check for negative
1102: sizes, in allocation routines.</a>
1.294 david 1103: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1104: A double free exists in cvs(1) that could lead to privilege
1105: escalation for cvs configurations where the cvs command is
1.392 ! tobias 1106: run as a privileged user.</a>
1.294 david 1107: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1108: A buffer overflow exists in named(8) that could lead to a
1109: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1110: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1111: Incorrect argument checking in the getitimer(2) system call
1112: may allow an attacker to crash the system.</a>
1.294 david 1113: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1114: An attacker can bypass smrsh(8)'s restrictions and execute
1115: arbitrary commands with the privileges of his own account.</a>
1.294 david 1116: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1117: A buffer overflow can occur in the kadmind(8) daemon, leading
1118: to possible remote crash or exploit.</a>
1.294 david 1119: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1120: Incorrect argument checking in the setitimer(2) system call
1121: may allow an attacker to write to kernel memory.</a>
1.294 david 1122: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1123: An insufficient boundary check in the select system call
1.220 miod 1124: allows an attacker to overwrite kernel memory and execute arbitrary code
1125: in kernel context.</a>
1.294 david 1126: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1127: Several remote buffer overflows can occur in the SSL2 server and SSL3
1128: client of the ssl(8) library, as in the ASN.1 parser code in the
1129: crypto(3) library, all of them being potentially remotely
1130: exploitable.</a>
1.294 david 1131: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1132: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1133: possible remote crash.</a>
1.294 david 1134: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1135: A race condition exists in the pppd(8) daemon which may cause it to
1136: alter the file permissions of an arbitrary file.</a>
1.294 david 1137: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1138: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1139: crash.</a>
1.294 david 1140: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1141: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1142: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1143: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1144: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1145: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1146: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1147: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1148: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1149: input validation error that can result in an integer overflow and
1150: privilege escalation.</a>
1.294 david 1151: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1152: A buffer overflow can occur during the interpretation of chunked
1153: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1154: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1155: Under certain conditions, on systems using YP with netgroups
1156: in the password database, it is possible that sshd(8) does
1157: ACL checks for the requested user name but uses the password
1158: database entry of a different user for authentication. This
1159: means that denied users might authenticate successfully
1160: while permitted users could be locked out.</a>
1.294 david 1161: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1162: A race condition exists that could defeat the kernel's
1163: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1164: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1165: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1166: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1167: A local user can gain super-user privileges due to a buffer
1168: overflow in sshd(8) if AFS has been configured on the system
1169: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1170: in the sshd_config file.</a>
1.203 deraadt 1171: </ul>
1172:
1.235 miod 1173: <p>
1.203 deraadt 1174: <li>
1.288 matthieu 1175: <a name="30"></a>
1.187 deraadt 1176:
1.294 david 1177: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1178: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1179: in <a href="anoncvs.html">OpenBSD current</a>. The
1180: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1181: you should update your machine.
1.187 deraadt 1182:
1183: <p>
1184: <ul>
1.294 david 1185: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1186: A buffer overflow exists in named(8) that could lead to a
1187: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1188: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1189: Incorrect argument checking in the getitimer(2) system call
1190: may allow an attacker to crash the system.</a>
1.294 david 1191: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1192: An attacker can bypass smrsh(8)'s restrictions and execute
1193: arbitrary commands with the privileges of his own account.</a>
1.294 david 1194: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1195: A buffer overflow can occur in the kadmind(8) daemon, leading
1196: to possible remote crash or exploit.</a>
1.294 david 1197: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1198: Incorrect argument checking in the setitimer(2) system call
1199: may allow an attacker to write to kernel memory.</a>
1.294 david 1200: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1201: An insufficient boundary check in the select and poll system calls
1202: allows an attacker to overwrite kernel memory and execute arbitrary code
1203: in kernel context.</a>
1.294 david 1204: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1205: Several remote buffer overflows can occur in the SSL2 server and SSL3
1206: client of the ssl(8) library, as in the ASN.1 parser code in the
1207: crypto(3) library, all of them being potentially remotely
1208: exploitable.</a>
1.294 david 1209: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1210: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1211: possible remote crash.</a>
1.294 david 1212: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1213: A race condition exists in the pppd(8) daemon which may cause it to
1214: alter the file permissions of an arbitrary file.</a>
1.294 david 1215: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1216: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1217: crash.</a>
1.294 david 1218: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1219: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1220: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1221: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1222: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1223: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1224: input validation error that can result in an integer overflow and
1225: privilege escalation.</a>
1.294 david 1226: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1227: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1228: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1229: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1230: A buffer overflow can occur during the interpretation of chunked
1231: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1232: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1233: A race condition exists that could defeat the kernel's
1234: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1235: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1236: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1237: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1238: A local user can gain super-user privileges due to a buffer
1239: overflow in sshd(8) if AFS has been configured on the system
1240: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1241: in the sshd_config file.</a>
1.294 david 1242: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1243: The mail(1) was interpreting tilde escapes even when invoked
1244: in non-interactive mode. As mail(1) is called as root from cron,
1245: this can lead to a local root compromise.</a>
1.294 david 1246: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1247: Under certain conditions, on systems using YP with netgroups in
1248: the password database, it is possible for the rexecd(8) and rshd(8)
1249: daemons to execute a shell from a password database entry for a
1250: different user. Similarly, atrun(8) may change to the wrong
1251: home directory when running jobs.</a>
1.294 david 1252: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1253: A potential double free() exists in the zlib library;
1254: this is not exploitable on OpenBSD.
1255: The kernel also contains a copy of zlib; it is not
1256: currently known if the kernel zlib is exploitable.</a>
1.294 david 1257: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1258: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1259: may allow a local user to gain super-user privileges.</a>
1.294 david 1260: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1261: A race condition between the ptrace(2) and execve(2) system calls
1262: allows an attacker to modify the memory contents of suid/sgid
1263: processes which could lead to compromise of the super-user account.</a>
1.294 david 1264: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1265: There is a security hole in sudo(8) that can be exploited
1266: when the Postfix sendmail replacement is installed that may
1267: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1268: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1269: An attacker can trick a machine running the lpd daemon into
1270: creating new files in the root directory from a machine with
1271: remote line printer access.</a>
1.294 david 1272: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1273: The vi.recover script can be abused in such a way as
1274: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1275: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1276: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1277: resulting in a crash.</a>
1.294 david 1278: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1279: A security hole that may allow an attacker to partially authenticate
1280: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1281: </ul>
1282:
1283: <p>
1284: <li>
1.288 matthieu 1285: <a name="29"></a>
1.173 deraadt 1286:
1.294 david 1287: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1288: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1289: in <a href="anoncvs.html">OpenBSD current</a>. The
1290: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1291: you should update your machine.
1292:
1.173 deraadt 1293:
1294: <p>
1295: <ul>
1.294 david 1296: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1297: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1298: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1299: A race condition exists that could defeat the kernel's
1300: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1301: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1302: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1303: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1304: A local user can gain super-user privileges due to a buffer
1305: overflow in sshd(8) if AFS has been configured on the system
1306: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1307: in the sshd_config file.</a>
1.294 david 1308: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1309: The mail(1) was interpreting tilde escapes even when invoked
1310: in non-interactive mode. As mail(1) is called as root from cron,
1311: this can lead to a local root compromise.</a>
1.294 david 1312: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1313: A potential double free() exists in the zlib library;
1314: this is not exploitable on OpenBSD.
1315: The kernel also contains a copy of zlib; it is not
1316: currently known if the kernel zlib is exploitable.</a>
1.294 david 1317: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1318: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1319: may allow a local user to gain super-user privileges.</a>
1.294 david 1320: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1321: A race condition between the ptrace(2) and execve(2) system calls
1322: allows an attacker to modify the memory contents of suid/sgid
1323: processes which could lead to compromise of the super-user account.</a>
1.294 david 1324: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1325: There is a security hole in sudo(8) that can be exploited
1326: when the Postfix sendmail replacement is installed that may
1327: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1328: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1329: An attacker can trick a machine running the lpd daemon into
1330: creating new files in the root directory from a machine with
1331: remote line printer access.</a>
1.294 david 1332: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1333: The vi.recover script can be abused in such a way as
1334: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1335: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1336: A security hole exists in uuxqt(8) that may allow an
1337: attacker to gain root privileges.</a>
1.294 david 1338: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1339: A security hole exists in lpd(8) that may allow an
1340: attacker to gain root privileges if lpd is running.</a>
1.294 david 1341: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1342: A security hole exists in sendmail(8) that may allow an
1343: attacker on the local host to gain root privileges.</a>
1.294 david 1344: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1345: A kernel buffer overflow in the NFS code can be used to execute
1346: arbitrary code by users with mount privileges (only root by
1.181 millert 1347: default).</a>
1.294 david 1348: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1349: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1350: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1351: sshd(8) allows users to delete arbitrary files named "cookies"
1352: if X11 forwarding is enabled. X11 forwarding is disabled
1353: by default.</a>
1.294 david 1354: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1355: Programs using the fts routines can be tricked into changing
1356: into the wrong directory.</a>
1.294 david 1357: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1358: Sendmail signal handlers contain unsafe code,
1359: leading to numerous race conditions.</a>
1.173 deraadt 1360: </ul>
1361:
1362: <p>
1363: <li>
1.288 matthieu 1364: <a name="28"></a>
1.152 deraadt 1365:
1.294 david 1366: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1367: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1368: in <a href="anoncvs.html">OpenBSD current</a>. The
1369: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1370: you should update your machine.
1371:
1.152 deraadt 1372:
1373: <p>
1374: <ul>
1.294 david 1375: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1376: A security hole exists in uuxqt(8) that may allow an
1377: attacker to gain root privileges.</a>
1.294 david 1378: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1379: A security hole exists in lpd(8) that may allow an
1380: attacker to gain root privileges if lpd is running.</a>
1.294 david 1381: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1382: A security hole exists in sendmail(8) that may allow an
1383: attacker on the local host to gain root privileges.</a>
1.294 david 1384: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1385: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1386: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1387: Programs using the fts routines can be tricked into changing
1388: into the wrong directory.</a>
1.294 david 1389: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1390: Sendmail signal handlers contain unsafe code,
1391: leading to numerous race conditions.</a>
1.294 david 1392: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1393: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1394: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1395: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1396: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1397: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1398: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1399: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1400: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1401: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1402: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1403: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1404: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1405: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1406: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1407: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1408: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1409: rnd(4) did not use all of its input when written to.</a>
1.294 david 1410: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1411: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1412: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1413: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1414: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1415: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1416: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1417: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1418: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1419: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1420: </ul>
1421:
1422: <p>
1423: <li>
1.288 matthieu 1424: <a name="27"></a>
1.124 deraadt 1425:
1.294 david 1426: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1427: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1428: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1429: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1430:
1431: <p>
1432: <ul>
1.294 david 1433: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1434: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1435: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1436: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1437: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1438: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1439: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1440: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1441: (patch included)</a>
1.294 david 1442: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1443: X11 libraries have 2 potential overflows in xtrans code.
1444: (patch included)</a>
1.294 david 1445: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1446: Apache mod_rewrite and mod_vhost_alias modules could expose files
1447: on the server in certain configurations if used.
1448: (patch included)</a>
1.294 david 1449: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1450: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1451: TERMPATH and TERMCAP environment variables as it should.
1452: (patch included)</a>
1.294 david 1453: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1454: There are printf-style format string bugs in several privileged
1455: programs. (patch included)</a>
1.294 david 1456: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1457: libcurses honored terminal descriptions in the $HOME/.terminfo
1458: directory as well as in the TERMCAP environment variable for
1459: setuid and setgid applications.
1.146 deraadt 1460: (patch included)</a>
1.294 david 1461: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1462: A format string vulnerability exists in talkd(8).
1463: (patch included)</a>
1.294 david 1464: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1465: A format string vulnerability exists in the pw_error() function of the
1466: libutil library, yielding localhost root through chpass(1).
1467: (patch included)</a>
1.294 david 1468: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1469: Bad ESP/AH packets could cause a crash under certain conditions.
1470: (patch included)</a>
1.294 david 1471: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1472: A format string vulnerability (localhost root) exists in xlock(1).
1473: (patch included)</a>
1.294 david 1474: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1475: Various bugs found in X11 libraries have various side effects, almost
1476: completely denial of service in OpenBSD.
1477: (patch included)</a>
1.294 david 1478: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1479: Just like pretty much all the other unix ftp daemons
1480: on the planet, ftpd had a remote root hole in it.
1481: Luckily, ftpd was not enabled by default.
1.137 deraadt 1482: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1483: (patch included)</a>
1.294 david 1484: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1485: Mopd, very rarely used, contained some buffer overflows.
1486: (patch included)</a>
1.294 david 1487: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1488: libedit would check for a <b>.editrc</b> file in the current
1489: directory. Not known to be a real security issue, but a patch
1490: is available anyways.
1491: (patch included)</a>
1.294 david 1492: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1493: A serious bug in dhclient(8) could allow strings from a
1494: malicious dhcp server to be executed in the shell as root.
1495: (patch included)</a>
1.294 david 1496: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1497: A serious bug in isakmpd(8) policy handling wherein
1498: policy verification could be completely bypassed in isakmpd.
1499: (patch included)</a>
1.294 david 1500: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1501: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1502: should not be used, and results in security problems on
1503: other operating systems.</a>
1.294 david 1504: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1505: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1506: (patch included)</a>
1.294 david 1507: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1508: Improper use of ipf <i>keep-state</i> rules can result
1509: in firewall rules being bypassed. (patch included)</a>
1510:
1.124 deraadt 1511: </ul>
1512:
1513: <p>
1514: <li>
1.288 matthieu 1515: <a name="26"></a>
1.119 deraadt 1516:
1.294 david 1517: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1518: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1519: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1520: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1521:
1522: <p>
1523: <ul>
1.294 david 1524: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1525: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1526: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1527: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1528: Improper use of ipf <i>keep-state</i> rules can result
1529: in firewall rules being bypassed. (patch included)</a>
1.294 david 1530: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1531: xlockmore has a bug which a localhost attacker can use to gain
1532: access to the encrypted root password hash (which is normally
1.245 miod 1533: encoded using blowfish</a> (see
1.294 david 1534: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1535: crypt(3)</a>)
1.245 miod 1536: (patch included).
1.294 david 1537: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1538: Systems running with procfs enabled and mounted are
1539: vulnerable to a very tricky exploit. procfs is not
1540: mounted by default.
1541: (patch included).</a>
1.294 david 1542: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1543: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1544: thus exposing the system to a race where the aliases file
1545: did not exist.
1.119 deraadt 1546: (patch included).</a>
1.294 david 1547: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1548: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1549: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1550: A buffer overflow in the RSAREF code included in the
1551: USA version of libssl, is possibly exploitable in
1552: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1553: (patch included).<br></a>
1554: <strong>Update:</strong> Turns out that this was not exploitable
1555: in any of the software included in OpenBSD 2.6.
1.294 david 1556: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1557: Any user could change interface media configurations, resulting in
1558: a localhost denial of service attack.
1.121 deraadt 1559: (patch included).</a>
1.119 deraadt 1560: </ul>
1561:
1562: <p>
1563: <li>
1.288 matthieu 1564: <a name="25"></a>
1.106 deraadt 1565:
1.294 david 1566: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1567: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1568: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1569: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1570:
1.96 deraadt 1571: <p>
1.104 deraadt 1572: <ul>
1.294 david 1573: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1574: In cron(8), make sure argv[] is NULL terminated in the
1575: fake popen() and run sendmail as the user, not as root.
1576: (patch included).</a>
1.294 david 1577: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1578: filesystems had an overrun in their handling of uio_offset
1579: in their readdir() routines. (These filesystems are not
1580: enabled by default). (patch included).</a>
1.294 david 1581: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1582: when we execve() a new process. (patch included).</a>
1.294 david 1583: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1584: been handled by IPsec may be transmitted as cleartext.
1585: PF_KEY SA expirations may leak kernel resources.
1586: (patch included).</a>
1.294 david 1587: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1588: motd re-writing and change the find(1) to use -execdir
1589: (patch included).</a>
1.294 david 1590: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1591: users to chflags(2) or fchflags(2) on character or block devices
1592: which they may currently be the owner of (patch included).</a>
1.294 david 1593: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1594: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1595: </ul>
1596:
1.106 deraadt 1597: <p>
1598: <li>
1.288 matthieu 1599: <a name="24"></a>
1.235 miod 1600:
1.294 david 1601: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1602: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1603: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1604: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1605:
1.96 deraadt 1606: <p>
1.75 deraadt 1607: <ul>
1.294 david 1608: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1609: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1610: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1611: another kernel crash case caused by the <strong>crashme</strong>
1612: program (patch included).</a>
1.294 david 1613: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1614: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1615: (patch included).</a>
1.294 david 1616: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1617: existed in ping(8). (patch included).</a>
1.294 david 1618: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1619: the ipq, which could permit an attacker to cause a crash.
1620: (patch included).</a>
1.294 david 1621: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1622: kernel between accept(2) and select(2) could permit an attacker
1623: to hang sockets from remote.
1624: (patch included).</a>
1.294 david 1625: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1626: bog the machine excessively and cause problems.
1627: (patch included).</a>
1.294 david 1628: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1629: DDB interacted to possibly cause a crash.
1630: (patch included).</a>
1.294 david 1631: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1632: (patch included).</a>
1.294 david 1633: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1634: problem in bootpd(8). (patch included).</a>
1.294 david 1635: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1636: exploitable problem relating to environment variables in termcap
1637: and curses. (patch included).</a>
1.294 david 1638: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1639: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1640: </ul>
1641:
1.106 deraadt 1642: <p>
1643: <li>
1.288 matthieu 1644: <a name="23"></a>
1.235 miod 1645:
1.294 david 1646: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1647: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1648: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1649: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1650:
1.96 deraadt 1651: <p>
1.53 matthieu 1652: <ul>
1.294 david 1653: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1654: problem in bootpd(8). (patch included).</a>
1.294 david 1655: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1656: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1657: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1658: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1659: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1660: chpass(1) has a file descriptor leak which allows an
1661: attacker to modify /etc/master.passwd.</a>
1.294 david 1662: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1663: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1664: should not be executed with fd slots 0, 1, or 2 free.
1665: (patch included).</a>
1.294 david 1666: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1667: libraries (patches included).</a>
1.294 david 1668: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1669: processes too permissive (4th revision patch included).</a>
1.294 david 1670: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1671: of immutable and append-only file flags. (patch included).</a>
1.294 david 1672: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1673: if IPSEC is enabled (patch included).</a>
1.294 david 1674: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1675: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1676: </ul>
1.9 deraadt 1677:
1.106 deraadt 1678: <p>
1679: <li>
1.288 matthieu 1680: <a name="22"></a>
1.235 miod 1681:
1.294 david 1682: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1683: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1684: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1685: still exist in other operating systems. (The supplied patches are for
1686: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1687:
1.96 deraadt 1688: <p>
1.9 deraadt 1689: <ul>
1.294 david 1690: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1691: packets if IPSEC is enabled (patch included).</a>
1.294 david 1692: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1693: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1694: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1695: (patch included).</a>
1.294 david 1696: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1697: (patch included).</a>
1.294 david 1698: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1699: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1700: (patch included).</a>
1.294 david 1701: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1702: export (patch included).</a>
1.112 philen 1703: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1704: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1705: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1706: Acceptance.</a>
1.294 david 1707: A patch is available <a href="errata22.html#sourceroute">here</a>.
1708: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1709: flaw (patch included).</a>
1.294 david 1710: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1711: </ul>
1712:
1.106 deraadt 1713: <p>
1714: <li>
1.288 matthieu 1715: <a name="21"></a>
1.235 miod 1716:
1.294 david 1717: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1718: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1719: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1720: exist in other operating systems. (If you are running OpenBSD 2.1, we
1721: would strongly recommend an upgrade to the newest release, as this
1722: patch list only attempts at fixing the most important security
1723: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1724: security problems. Many of those problems were solved in ways which
1725: make it hard for us to provide patches).
1726:
1.96 deraadt 1727: <p>
1.52 deraadt 1728: <ul>
1.112 philen 1729: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1730: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1731: (patch included)</a>
1.112 philen 1732: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1733: </ul>
1.51 deraadt 1734:
1.106 deraadt 1735: <p>
1736: <li>
1.288 matthieu 1737: <a name="20"></a>
1.235 miod 1738:
1.294 david 1739: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1740: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1741: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1742: exist in other operating systems. (If you are running OpenBSD 2.0, we
1743: commend you for being there back in the old days!, but you're really
1744: missing out if you don't install a new version!)
1745:
1746: <p>
1747: <ul>
1.112 philen 1748: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1749: resolver (patch included)</a>
1750: <li>Many others... if people can hunt them down, please let me know
1751: and we'll put them up here.
1752: </ul>
1.51 deraadt 1753: <p>
1.106 deraadt 1754:
1.288 matthieu 1755: <a name="watching"></a>
1.294 david 1756: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1757:
1.21 deraadt 1758: Since we take a proactive stance with security, we are continually
1759: finding and fixing new security problems. Not all of these problems
1.80 espie 1760: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1761: confirmed to be exploitable; many simple bugs we fix do turn out to
1762: have security consequences we could not predict. We do not have the
1763: time resources to make these changes available in the above format.<p>
1.21 deraadt 1764:
1765: Thus there are usually minor security fixes in the current source code
1766: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1767: guarantee that these problems are of minimal impact and unproven
1.44 ian 1768: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1769: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1770:
1.45 deraadt 1771: People who are really concerned with security can do a number of
1772: things:<p>
1.21 deraadt 1773:
1774: <ul>
1775: <li>If you understand security issues, watch our
1.294 david 1776: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1777: eye out for things which appear security related. Since
1.21 deraadt 1778: exploitability is not proven for many of the fixes we make,
1779: do not expect the relevant commit message to say "SECURITY FIX!".
1780: If a problem is proven and serious, a patch will be available
1781: here very shortly after.
1.161 horacio 1782: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1783: security-announce mailing list</a> which will notify you for every
1.186 ian 1784: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1785: and instruct you on how to patch the problem.
1.21 deraadt 1786: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1787: complete system build from time to time (read /usr/src/Makefile
1788: carefully). Users can make the assumption that the current
1789: source tree always has stronger security than the previous release.
1.45 deraadt 1790: However, building your own system from source code is not trivial;
1.265 miod 1791: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1792: transition between major releases.
1.115 ericj 1793: <li>Install a binary snapshot for your
1.80 espie 1794: architecture, which are made available fairly often. For
1.29 deraadt 1795: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1796: </ul>
1797:
1.9 deraadt 1798: <p>
1.288 matthieu 1799: <a name="reporting"></a>
1.294 david 1800: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1801:
1.5 deraadt 1802: <p> If you find a new security problem, you can mail it to
1.294 david 1803: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1804: <br>
1.5 deraadt 1805: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1806: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1807:
1.107 deraadt 1808: <p>
1.288 matthieu 1809: <a name="papers"></a>
1.294 david 1810: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1811:
1.389 lum 1812: Numerous
1813: <a href="papers/">papers</a> have been written by OpenBSD team members,
1814: many dedicated to security.
1.294 david 1815: </ul>
1.106 deraadt 1816:
1.2 deraadt 1817: <hr>
1.294 david 1818: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1819: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1820: <br>
1.392 ! tobias 1821: <small>$OpenBSD: security.html,v 1.391 2012/05/01 17:52:06 tobias Exp $</small>
1.1 deraadt 1822:
1.24 deraadt 1823: </body>
1824: </html>
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