Annotation of www/security.html, Revision 1.378
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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>,
1.365 deraadt 57: <br>
1.280 david 58: <a href="#34">3.4</a>,
1.301 miod 59: <a href="#35">3.5</a>,
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>,
! 70: <a href="#46">4.6</a>.
1.114 philen 71: </td>
72: </tr>
73: </table>
1.56 deraadt 74: <hr>
75:
1.294 david 76: <a name="goals"></a>
1.278 deraadt 77: <ul>
1.294 david 78: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 79:
1.14 deraadt 80: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 81: ONE in the industry for security (if we are not already there). Our
82: open software development model permits us to take a more
83: uncompromising view towards increased security than Sun, SGI, IBM, HP,
84: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 85: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 86: cryptography</a>, we are able to take cryptographic approaches towards
87: fixing security problems.<p>
1.18 deraadt 88:
1.288 matthieu 89: <a name="disclosure"></a>
1.294 david 90: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 91:
1.45 deraadt 92: Like many readers of the
1.196 jufi 93: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 94: BUGTRAQ mailing list</a>,
1.106 deraadt 95: we believe in full disclosure of security problems. In the
96: operating system arena, we were probably the first to embrace
97: the concept. Many vendors, even of free software, still try
98: to hide issues from their users.<p>
99:
100: Security information moves very fast in cracker circles. On the other
101: hand, our experience is that coding and releasing of proper security
102: fixes typically requires about an hour of work -- very fast fix
103: turnaround is possible. Thus we think that full disclosure helps the
104: people who really care about security.<p>
105:
1.288 matthieu 106: <a name="process"></a>
1.294 david 107: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 108:
1.12 deraadt 109: Our security auditing team typically has between six and twelve
1.45 deraadt 110: members who continue to search for and fix new security holes. We
111: have been auditing since the summer of 1996. The process we follow to
112: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 113: every critical software component. We are not so much looking for
114: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 115: years later someone discovers the problem used to be a security
1.106 deraadt 116: issue, and we fixed it because it was just a bug, well, all the
117: better. Flaws have been found in just about every area of the system.
118: Entire new classes of security problems have been found during our
119: audit, and often source code which had been audited earlier needs
120: re-auditing with these new flaws in mind. Code often gets audited
121: multiple times, and by multiple people with different auditing
122: skills.<p>
1.12 deraadt 123:
1.94 deraadt 124: Some members of our security auditing team worked for Secure Networks,
125: the company that made the industry's premier network security scanning
126: software package Ballista (Secure Networks got purchased by Network
127: Associates, Ballista got renamed to Cybercop Scanner, and well...)
128: That company did a lot of security research, and thus fit in well
1.106 deraadt 129: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
130: colours since day 1.<p>
1.31 deraadt 131:
1.34 deraadt 132: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 133: In most cases we have found that the determination of exploitability
134: is not an issue. During our ongoing auditing process we find many
135: bugs, and endeavor to fix them even though exploitability is not
136: proven. We fix the bug, and we move on to find other bugs to fix. We
137: have fixed many simple and obvious careless programming errors in code
138: and only months later discovered that the problems were in fact
139: exploitable. (Or, more likely someone on
1.197 jufi 140: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 141: would report that other operating systems were vulnerable to a `newly
142: discovered problem', and then it would be discovered that OpenBSD had
143: been fixed in a previous release). In other cases we have been saved
144: from full exploitability of complex step-by-step attacks because we
145: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 146: managed such a success is the lpd advisory that Secure Networks put out.
147: <p>
1.29 deraadt 148:
1.288 matthieu 149: <a name="newtech"></a>
1.294 david 150: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 151:
152: As we audit source code, we often invent new ways of solving problems.
153: Sometimes these ideas have been used before in some random application
154: written somewhere, but perhaps not taken to the degree that we do.
155: <p>
156:
157: <ul>
158: <li>strlcpy() and strlcat()
159: <li>Memory protection purify
160: <ul>
161: <li>W^X
162: <li>.rodata segment
163: <li>Guard pages
164: <li>Randomized malloc()
165: <li>Randomized mmap()
166: <li>atexit() and stdio protection
167: </ul>
1.295 otto 168: <li>Privilege separation
1.278 deraadt 169: <li>Privilege revocation
170: <li>Chroot jailing
171: <li>New uids
172: <li>ProPolice
173: <li>... and others
174: </ul>
175: <p>
176:
1.294 david 177: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 178:
1.45 deraadt 179: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 180: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 181: commonplace in security forums like
1.197 jufi 182: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 183:
1.45 deraadt 184: The most intense part of our security auditing happened immediately
1.80 espie 185: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 186: over the last third of 1996 and first half of 1997. Thousands (yes,
187: thousands) of security issues were fixed rapidly over this year-long
188: period; bugs like the standard buffer overflows, protocol
189: implementation weaknesses, information gathering, and filesystem
190: races. Hence most of the security problems that we encountered were
191: fixed before our 2.1 release, and then a far smaller number needed
192: fixing for our 2.2 release. We do not find as many problems anymore,
193: it is simply a case of diminishing returns. Recently the security
194: problems we find and fix tend to be significantly more obscure or
195: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 196:
1.35 deraadt 197: <ul>
1.45 deraadt 198: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 199: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 200: to search for more complicated exploits, so we will too.
201: <li>Finding and fixing subtle flaws in complicated software is
202: a lot of fun.
1.35 deraadt 203: </ul>
1.106 deraadt 204: <p>
1.15 deraadt 205:
1.14 deraadt 206: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 207: to find and fix new security flaws.<p>
1.12 deraadt 208:
1.288 matthieu 209: <a name="default"></a>
1.294 david 210: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 211:
212: To ensure that novice users of OpenBSD do not need to become security
213: experts overnight (a viewpoint which other vendors seem to have), we
214: ship the operating system in a Secure by Default mode. All non-essential
215: services are disabled. As the user/administrator becomes more familiar
216: with the system, he will discover that he has to enable daemons and other
217: parts of the system. During the process of learning how to enable a new
218: service, the novice is more likely to learn of security considerations.<p>
219:
220: This is in stark contrast to the increasing number of systems that
221: ship with NFS, mountd, web servers, and various other services enabled
222: by default, creating instantaneous security problems for their users
223: within minutes after their first install.<p>
224:
1.288 matthieu 225: <a name="crypto"></a>
1.294 david 226: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 227:
228: And of course, since the OpenBSD project is based in Canada, it is possible
229: for us to integrate cryptography. For more information, read the page
1.116 deraadt 230: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 231:
1.294 david 232: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 233:
234: <li>
1.378 ! jasper 235: <a name="46"></a>
! 236:
! 237: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
! 238: These are the OpenBSD 4.6 advisories -- all these problems are solved
! 239: in <a href=anoncvs.html>OpenBSD current</a> and the
! 240: <a href=stable.html>patch branch</a>.
! 241:
! 242: <p>
! 243: <ul>
! 244: <li><a href="errata46.html#001_bind">July 29, 2009:
! 245: BIND's named could be made to crash with a specially crafted
! 246: dynamic update message to a zone for which the server is
! 247: master.</a>
! 248: </ul>
1.373 djm 249: <a name="45"></a>
250:
251: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
252: These are the OpenBSD 4.5 advisories -- all these problems are solved
253: in <a href=anoncvs.html>OpenBSD current</a> and the
254: <a href=stable.html>patch branch</a>.
255:
256: <p>
257: <ul>
1.378 ! jasper 258: <li><a href="errata45.html#007_bind">July 29, 2009:
! 259: BIND's named could be made to crash with a specially crafted
! 260: dynamic update message to a zone for which the server is
! 261: master.</a>
1.374 sthen 262: <li><a href="errata45.html#002_pf">April 11, 2009:
263: When pf attempts to perform translation on a specially
264: crafted IP datagram, a null pointer dereference will occur,
265: resulting in a kernel panic.</a>
1.373 djm 266: <li><a href="errata45.html#001_openssl">April 8, 2009:
267: OpenSSL's ASN.1 handling code could be forced to make invalid
268: memory accesses by certain invalid strings or structures, allowing
269: denial-of-service attacks.</a>
270: </ul>
271:
272: <li>
1.365 deraadt 273: <a name="44"></a>
274:
275: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
276: These are the OpenBSD 4.4 advisories -- all these problems are solved
277: in <a href=anoncvs.html>OpenBSD current</a> and the
278: <a href=stable.html>patch branch</a>.
279:
280: <p>
281: <ul>
1.378 ! jasper 282: <li><a href="errata44.html#014_bind">July 29, 2009:
! 283: BIND's named could be made to crash with a specially crafted
! 284: dynamic update message to a zone for which the server is
! 285: master.</a>
1.374 sthen 286: <li><a href="errata44.html#013_pf">April 11, 2009:
287: When pf attempts to perform translation on a specially
288: crafted IP datagram, a null pointer dereference will occur,
289: resulting in a kernel panic.</a>
1.373 djm 290: <li><a href="errata44.html#012_openssl">April 8, 2009:
291: OpenSSL's ASN.1 handling code could be forced to make invalid
292: memory accesses by certain invalid strings or structures, allowing
293: denial-of-service attacks.</a>
1.372 millert 294: <li><a href="errata44.html#011_sudo">February 22, 2009:
295: sudo(8) may allow a user listed in sudoers to run a command
296: as a different user than their access rule specifies when a Unix
297: group is used in the RunAs portion of the rule.</a>
1.370 djm 298: <li><a href="errata44.html#008_bind">January 15, 2009:
299: named(8) suffered from a similar logic error that may allow
300: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 301: <li><a href="errata44.html#007_openssl">January 9, 2009:
302: OpenSSL suffered from some logic errors that allowed bypass
303: of DSA/ECDSA certificate validation.</a>
1.367 brad 304: <li><a href="errata44.html#001_ndp">November 2, 2008:
305: The Neighbor Discovery Protocol (ndp) did not correctly verify
306: neighbor solicitation requests maybe allowing a nearby attacker
307: to intercept traffic.</a>
1.365 deraadt 308: </ul>
309:
1.375 miod 310: <p>
311: OpenBSD 4.3 and earlier releases are not supported anymore. The following
312: paragraphs only list advisories issued while they were maintained; these
313: releases are likely to be affected by the advisories for more recent releases.
314: <br>
315:
1.365 deraadt 316: <li>
1.357 brad 317: <a name="43"></a>
318:
319: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
320: These are the OpenBSD 4.3 advisories -- all these problems are solved
321: in <a href=anoncvs.html>OpenBSD current</a> and the
322: <a href=stable.html>patch branch</a>.
323:
324: <p>
325: <ul>
1.374 sthen 326: <li><a href="errata43.html#013_pf">April 11, 2009:
327: When pf attempts to perform translation on a specially
328: crafted IP datagram, a null pointer dereference will occur,
329: resulting in a kernel panic.</a>
1.373 djm 330: <li><a href="errata43.html#012_openssl">April 8, 2009:
331: OpenSSL's ASN.1 handling code could be forced to make invalid
332: memory accesses by certain invalid strings or structures, allowing
333: denial-of-service attacks.</a>
1.372 millert 334: <li><a href="errata43.html#011_sudo">February 22, 2009:
335: sudo(8) may allow a user listed in sudoers to run a command
336: as a different user than their access rule specifies when a Unix
337: group is used in the RunAs portion of the rule.</a>
1.370 djm 338: <li><a href="errata43.html#008_bind">January 15, 2009:
339: named(8) suffered from a similar logic error that may allow
340: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 341: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 342: OpenSSL suffered from some logic errors that allowed bypass
343: of DSA/ECDSA certificate validation.</a>
1.363 brad 344: <li><a href="errata43.html#005_ndp">October 2, 2008:
345: The Neighbor Discovery Protocol (ndp) did not correctly verify
346: neighbor solicitation requests maybe allowing a nearby attacker
347: to intercept traffic.</a>
1.362 brad 348: <li><a href="errata43.html#004_bind">July 23, 2008:
349: A vulnerability has been found with BIND.</a>
1.361 brad 350: <li><a href="errata43.html#003_xorg">July 15, 2008:
351: Multiple vulnerabilities in X.Org.</a>
1.359 brad 352: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 353: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 354: <li><a href="errata43.html#001_openssh">March 30, 2008:
355: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 356: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 357: </ul>
358:
359: <li>
1.348 merdely 360: <a name="42"></a>
361: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
362: These are the OpenBSD 4.2 advisories -- all these problems are solved
363: in <a href=anoncvs.html>OpenBSD current</a> and the
364: <a href=stable.html>patch branch</a>.
365:
366: <p>
367: <ul>
1.364 tobias 368: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 369: The Neighbor Discovery Protocol (ndp) did not correctly verify
370: neighbor solicitation requests maybe allowing a nearby attacker
371: to intercept traffic.</a>
1.362 brad 372: <li><a href="errata42.html#013_bind">July 23, 2008:
373: A vulnerability has been found with BIND.</a>
1.361 brad 374: <li><a href="errata42.html#012_xorg2">July 15, 2008:
375: Multiple vulnerabilities in X.Org.</a>
1.359 brad 376: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 377: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 378: <li><a href="errata42.html#010_openssh">March 30, 2008:
379: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 380: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 381: <li><a href="errata42.html#009_ppp">March 7, 2008:
382: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 383: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
384: Multiple vulnerabilities in X.Org.</a>
1.352 henning 385: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
386: A missing NULL pointer check can lead to a kernel panic.</a>
387: <li><a href="errata42.html#004_pf">Nov 27, 2007:
388: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 389: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
390: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 391: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 392: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 393: </ul>
394:
395: <li>
1.346 matthieu 396: <a name="41"></a>
397:
398: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
399: These are the OpenBSD 4.1 advisories -- all these problems are solved
400: in <a href=anoncvs.html>OpenBSD current</a> and the
401: <a href=stable.html>patch branch</a>.
402:
403: <p>
404: <ul>
1.359 brad 405: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 406: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 407: <li><a href="errata41.html#015_openssh">March 30, 2008:
408: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 409: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 410: <li><a href="errata41.html#014_ppp">March 7, 2008:
411: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 412: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
413: Multiple vulnerabilities in X.Org.</a>
414: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
415: The SSL_get_shared_ciphers() function in OpenSSL contains
416: an off-by-one overflow.</a>
1.350 deraadt 417: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 418: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 419: <li><a href="errata41.html#009_file">Jul 9, 2007:
420: Fix possible heap overflow in file(1).</a>
1.346 matthieu 421: <li><a href="errata41.html#005_route6">Apr 27, 2007:
422: IPv6 type 0 route headers can be used to mount a DoS attack
423: against hosts and networks.</a>
424: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
425: Multiple vulnerabilities in X.Org.</a>
426: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
427: Incorrect mbuf handling for ICMP6 packets.</a>
428: </ul>
429:
430: <li>
1.334 brad 431: <a name="40"></a>
432: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
433: These are the OpenBSD 4.0 advisories -- all these problems are solved
434: in <a href=anoncvs.html>OpenBSD current</a> and the
435: <a href=stable.html>patch branch</a>.
436:
437: <p>
438: <ul>
1.350 deraadt 439: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 440: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 441: <li><a href="errata40.html#015_file">Jul 9, 2007:
442: Fix possible heap overflow in file(1).</a>
1.343 deraadt 443: <li><a href="errata40.html#012_route6">Apr 23, 2007:
444: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 445: against hosts and networks.</a>
1.342 mbalmer 446: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
447: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 448: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
449: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 450: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 451: Insufficient validation in vga(4) may allow an attacker to gain
452: root privileges on some i386 systems.</a>
1.339 deraadt 453: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 454: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 455: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 456: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
457: found by Chris Evans.</a>
1.339 deraadt 458: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 459: Several problems have been found in OpenSSL.</a>
1.339 deraadt 460: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 461: httpd(8) does not sanitize the Expect header from an HTTP request
462: when it is reflected back in an error message, which might allow
463: cross-site scripting (XSS) style attacks.</a>
464: </ul>
465:
466: <li>
1.321 brad 467: <a name="39"></a>
468:
469: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
470: These are the OpenBSD 3.9 advisories -- all these problems are solved
471: in <a href=anoncvs.html>OpenBSD current</a> and the
472: <a href=stable.html>patch branch</a>.
473:
474: <p>
475: <ul>
1.343 deraadt 476: <li><a href="errata39.html#022_route6">Apr 23, 2007:
477: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 478: against hosts and networks.</a>
1.342 mbalmer 479: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
480: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 481: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
482: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 483: <li><a href="errata39.html#agp">Jan 3, 2007:
484: Insufficient validation in vga(4) may allow an attacker to gain
485: root privileges on some i386 systems.</a>
1.336 brad 486: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 487: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 488: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 489: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 490: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 491: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 492: found by Chris Evans.</a>
1.333 deraadt 493: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 494: Several problems have been found in OpenSSL.</a>
1.333 deraadt 495: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 496: httpd(8) does not sanitize the Expect header from an HTTP request
497: when it is reflected back in an error message, which might allow
498: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 499: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 500: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
501: possible for an attacker to construct an invalid signature which
502: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 503: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 504: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 505: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 506: Due to the failure to correctly validate LCP configuration option
507: lengths, it is possible for an attacker to send LCP packets via an
508: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 509: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 510: A problem in isakmpd(8) caused IPsec to run partly without replay
511: protection.</a>
1.333 deraadt 512: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 513: It is possible to cause the kernel to panic when more than the default
514: number of sempahores have been allocated.</a>
1.333 deraadt 515: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 516: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
517: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
518: option.</a>
1.333 deraadt 519: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 520: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 521: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 522: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
523: overflow.</a>
1.333 deraadt 524: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 525: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 526: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 527: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 528: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 529: A race condition has been reported to exist in the handling by sendmail
530: of asynchronous signals.</a>
531: </ul>
532:
533: <li>
1.318 deraadt 534: <a name="38"></a>
535:
536: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
537: These are the OpenBSD 3.8 advisories -- all these problems are solved
538: in <a href=anoncvs.html>OpenBSD current</a> and the
539: <a href=stable.html>patch branch</a>.
540:
541: <p>
542: <ul>
1.332 brad 543: <li><a href="errata38.html#ssh2">Oct 12, 2006:
544: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 545: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 546: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 547: found by Chris Evans.</a>
548: <li><a href="errata38.html#openssl2">Oct 7, 2006:
549: Several problems have been found in OpenSSL.</a>
550: <li><a href="errata38.html#httpd2">Oct 7, 2006:
551: httpd(8) does not sanitize the Expect header from an HTTP request
552: when it is reflected back in an error message, which might allow
553: cross-site scripting (XSS) style attacks.</a>
1.329 brad 554: <li><a href="errata38.html#openssl">Sep 8, 2006:
555: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
556: possible for an attacker to construct an invalid signature which
557: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 558: <li><a href="errata38.html#bind">Sep 8, 2006:
559: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 560: <li><a href="errata38.html#sppp">Sep 2, 2006:
561: Due to the failure to correctly validate LCP configuration option
562: lengths, it is possible for an attacker to send LCP packets via an
563: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 564: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
565: A problem in isakmpd(8) caused IPsec to run partly without replay
566: protection.</a>
567: <li><a href="errata38.html#sem">Aug 25, 2006:
568: It is possible to cause the kernel to panic when more than the default
569: number of sempahores have been allocated.</a>
570: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
571: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
572: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
573: option.</a>
574: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
575: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 576: <li><a href="errata38.html#httpd">Jul 30, 2006:
577: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
578: overflow.</a>
1.324 brad 579: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
580: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 581: <li><a href="errata38.html#xorg">May 2, 2006:
582: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 583: <li><a href="errata38.html#sendmail">Mar 25, 2006:
584: A race condition has been reported to exist in the handling by sendmail
585: of asynchronous signals.</a>
586: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 587: Josh Bressers has reported a weakness in OpenSSH caused due to the
588: insecure use of the system(3) function in scp(1) when performing copy
589: operations using filenames that are supplied by the user from the
590: command line.</a>
1.321 brad 591: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 592: Do not allow users to trick suid programs into re-opening files via
593: /dev/fd.</a>
1.321 brad 594: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 595: A buffer overflow has been found in the Perl interpreter with the
596: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 597: </ul>
598:
599: <li>
1.312 david 600: <a name="37"></a>
601:
602: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
603: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 604: in <a href="anoncvs.html">OpenBSD current</a>. The
605: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
606: you should update your machine.
1.312 david 607:
608: <p>
609: <ul>
1.322 brad 610: <li><a href="errata37.html#xorg">May 2, 2006:
611: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 612: <li><a href="errata37.html#sendmail">Mar 25, 2006:
613: A race condition has been reported to exist in the handling by sendmail
614: of asynchronous signals.</a>
1.320 brad 615: <li><a href="errata37.html#ssh">Feb 12, 2006:
616: Josh Bressers has reported a weakness in OpenSSH caused due to the
617: insecure use of the system(3) function in scp(1) when performing copy
618: operations using filenames that are supplied by the user from the
619: command line.</a>
1.319 brad 620: <li><a href="errata37.html#fd">Jan 5, 2006:
621: Do not allow users to trick suid programs into re-opening files via
622: /dev/fd.</a>
623: <li><a href="errata37.html#perl">Jan 5, 2006:
624: A buffer overflow has been found in the Perl interpreter with the
625: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 626: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 627: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 628: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 629: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 630: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 631: Fix a race condition in sudo(8) that could allow a user
1.315 millert 632: to run arbitrary commands.</a>
1.318 deraadt 633: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 634: Fix a buffer overflow, memory leaks, and NULL pointer
635: dereference in cvs(1).</a>
1.312 david 636: </ul>
637:
638: <li>
1.301 miod 639: <a name="36"></a>
640:
641: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
642: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 643: in <a href="anoncvs.html">OpenBSD current</a>. The
644: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
645: you should update your machine.
1.301 miod 646:
647: <p>
1.302 markus 648: <ul>
1.317 millert 649: <li><a href="errata36.html#libz2">Jul 21, 2005:
650: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 651: <li><a href="errata36.html#libz">Jul 6, 2005:
652: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 653: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 654: Fix a race condition in sudo(8) that could allow a user
1.315 millert 655: to run arbitrary commands.</a>
1.311 deraadt 656: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 657: Fix a buffer overflow, memory leaks, and NULL pointer
658: dereference in cvs(1).</a>
1.311 deraadt 659: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 660: Due to buffer overflows in telnet(1), a malicious
661: server or man-in-the-middle attack could allow
662: execution of arbitrary code with the privileges of
663: the user invoking telnet(1).</a>
1.311 deraadt 664: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 665: More stringent checking should be done in the copy(9)
666: functions to prevent their misuse.</a>
1.311 deraadt 667: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 668: More stringent checking should be done in the copy(9)
669: functions to prevent their misuse.</a>
1.311 deraadt 670: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 671: httpd(8)'s mod_include module fails to properly validate
672: the length of user supplied tag strings prior to copying
1.305 brad 673: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 674: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 675: On systems running isakmpd(8) it is possible for a local
676: user to cause kernel memory corruption and system panic by
1.303 markus 677: setting ipsec(4) credentials on a socket.</a>
1.302 markus 678: </ul>
1.301 miod 679:
680: <li>
1.288 matthieu 681: <a name="35"></a>
1.279 deraadt 682:
1.294 david 683: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 684: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 685: in <a href="anoncvs.html">OpenBSD current</a>. The
686: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
687: you should update your machine.
1.279 deraadt 688:
689: <p>
690: <ul>
1.310 brad 691: <li><a href="errata35.html#cvs4">Apr 28, 2005:
692: Fix a buffer overflow, memory leaks, and NULL pointer
693: dereference in cvs(1).</a>
1.309 brad 694: <li><a href="errata35.html#telnet">Mar 30, 2005:
695: Due to buffer overflows in telnet(1), a malicious
696: server or man-in-the-middle attack could allow
697: execution of arbitrary code with the privileges of
698: the user invoking telnet(1).</a>
1.308 brad 699: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 700: More stringent checking should be done in the copy(9)
701: functions to prevent their misuse.</a>
1.306 brad 702: <li><a href="errata35.html#locore">Feb 28, 2005:
703: More stringent checking should be done in the copy(9)
704: functions to prevent their misuse.</a>
1.304 brad 705: <li><a href="errata35.html#httpd3">Jan 12, 2005:
706: httpd(8)'s mod_include module fails to properly validate
707: the length of user supplied tag strings prior to copying
1.305 brad 708: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 709: <li><a href="errata35.html#pfkey">Dec 14, 2004:
710: On systems running isakmpd(8) it is possible for a local
711: user to cause kernel memory corruption and system panic by
1.303 markus 712: setting ipsec(4) credentials on a socket.</a>
1.301 miod 713: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 714: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 715: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 716: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 717: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 718: httpd(8)'s mod_rewrite module can be made to write one zero byte in
719: an arbitrary memory position outside of a char array, causing a DoS
720: or possibly buffer overflows.</a>
1.301 miod 721: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 722: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 723: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 724: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 725: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 726: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 727: Multiple remote vulnerabilities have been found in the cvs(1)
728: server which can be used by CVS clients to crash or execute
1.293 brad 729: arbitrary code on the server.</a>
1.301 miod 730: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 731: kdc(8) performs inadequate checking of request fields, leading
732: to the possibility of principal impersonation from other
733: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 734: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 735: xdm(1) ignores the requestPort resource and creates a
1.293 brad 736: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 737: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 738: A buffer overflow in the cvs(1) server has been found,
739: which can be used by CVS clients to execute arbitrary code on
1.293 brad 740: the server.</a>
1.301 miod 741: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 742: Integer overflow problems were found in procfs, allowing
1.293 brad 743: reading of arbitrary kernel memory.</a>
1.301 miod 744: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 745: Pathname validation problems have been found in cvs(1),
746: allowing clients and servers access to files outside the
1.293 brad 747: repository or local CVS tree.</a>
1.279 deraadt 748: </ul>
749:
750: <p>
751: <li>
1.288 matthieu 752: <a name="34"></a>
1.261 david 753:
1.294 david 754: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 755: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 756: in <a href="anoncvs.html">OpenBSD current</a>. The
757: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
758: you should update your machine.
1.261 david 759: <p>
760: <ul>
1.302 markus 761: <li><a href="errata34.html#pfkey">Dec 14, 2004:
762: On systems running isakmpd(8) it is possible for a local
763: user to cause kernel memory corruption and system panic by
1.303 markus 764: setting ipsec(4) credentials on a socket.</a>
1.298 brad 765: <li><a href="errata34.html#xpm">Sep 16, 2004:
766: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 767: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
768: httpd(8)'s mod_rewrite module can be made to write one zero byte in
769: an arbitrary memory position outside of a char array, causing a DoS
770: or possibly buffer overflows.</a>
1.294 david 771: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 772: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 773: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 774: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 775: an attacker can delete IPsec tunnels at will.</a>
1.294 david 776: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 777: Multiple remote vulnerabilities have been found in the cvs(1)
778: server which can be used by CVS clients to crash or execute
1.293 brad 779: arbitrary code on the server.</a>
1.294 david 780: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 781: kdc(8) performs inadequate checking of request fields, leading
782: to the possibility of principal impersonation from other
783: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 784: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 785: A buffer overflow in the cvs(1) server has been found,
786: which can be used by CVS clients to execute arbitrary code on
787: the server.</a>
1.294 david 788: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 789: Integer overflow problems were found in procfs, allowing
790: reading of arbitrary kernel memory.</a>
1.294 david 791: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 792: Pathname validation problems have been found in cvs(1),
793: allowing clients and servers access to files outside the
794: repository or local CVS tree.</a>
1.294 david 795: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 796: A missing check for a NULL-pointer dereference may allow a
1.281 otto 797: remote attacker to crash applications using OpenSSL.</a>
1.294 david 798: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 799: Defects in the payload validation and processing functions of
800: isakmpd have been discovered. An attacker could send malformed
801: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 802: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 803: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
804: access module, using IP addresses without a netmask on big endian
805: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 806: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 807: An IPv6 MTU handling problem exists that could be used by an
808: attacker to cause a denial of service attack.</a>
1.294 david 809: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 810: A reference counting bug in shmat(2) could be used to write to
811: kernel memory under certain circumstances.</a>
1.294 david 812: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 813: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 814: by Thomas Walpuski.</a>
1.294 david 815: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 816: It may be possible for a local user to overrun the stack in
817: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 818: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 819: The use of certain ASN.1 encodings or malformed public keys may
820: allow an attacker to mount a denial of service attack against
821: applications linked with ssl(3).</a>
1.261 david 822: </ul>
823:
824: <li>
1.288 matthieu 825: <a name="33"></a>
1.246 deraadt 826:
1.294 david 827: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 828: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 829: in <a href="anoncvs.html">OpenBSD current</a>. The
830: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 831: you should update your machine.
1.246 deraadt 832: <p>
833: <ul>
1.294 david 834: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 835: Pathname validation problems have been found in cvs(1),
836: allowing clients and servers access to files outside the
837: repository or local CVS tree.</a>
1.294 david 838: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 839: A missing check for a NULL-pointer dereference may allow a
1.281 otto 840: remote attacker to crash applications using OpenSSL.</a>
1.294 david 841: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 842: Defects in the payload validation and processing functions of
843: isakmpd have been discovered. An attacker could send malformed
844: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 845: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 846: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
847: access module, using IP addresses without a netmask on big endian
848: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 849: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 850: An IPv6 MTU handling problem exists that could be used by an
851: attacker to cause a denial of service attack.</a>
1.294 david 852: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 853: A reference counting bug in shmat(2) could be used to write to
854: kernel memory under certain circumstances.</a>
1.294 david 855: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 856: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 857: by Thomas Walpuski.</a>
1.294 david 858: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 859: It may be possible for a local user to execute arbitrary code
860: resulting in escalation of privileges due to a stack overrun
861: in compat_ibcs2(8).</a>
1.294 david 862: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 863: The use of certain ASN.1 encodings or malformed public keys may
864: allow an attacker to mount a denial of service attack against
865: applications linked with ssl(3).</a>
1.294 david 866: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 867: Access of freed memory in pf(4) could be used to
1.260 margarid 868: remotely panic a machine using scrub rules.</a>
1.294 david 869: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 870: A buffer overflow in the address parsing in
871: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 872: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 873: OpenSSH versions prior to 3.7 contains a buffer management error
874: that is potentially exploitable.</a>
1.294 david 875: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 876: Root may be able to reduce the security level by taking advantage of
877: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 878: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 879: An improper bounds check in the kernel may allow a local user
880: to panic the kernel.</a>
1.294 david 881: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 882: An off-by-one error exists in the C library function realpath(3)
883: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 884: </ul>
885:
1.265 miod 886:
1.247 david 887: <p>
1.246 deraadt 888: <li>
1.288 matthieu 889: <a name="32"></a>
1.224 deraadt 890:
1.294 david 891: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 892: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 893: in <a href="anoncvs.html">OpenBSD current</a>. The
894: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 895: you should update your machine.
1.224 deraadt 896: <p>
897: <ul>
1.294 david 898: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 899: The use of certain ASN.1 encodings or malformed public keys may
900: allow an attacker to mount a denial of service attack against
901: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 902: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 903: Access of freed memory in pf(4) could be used to
1.260 margarid 904: remotely panic a machine using scrub rules.</a>
1.294 david 905: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 906: A buffer overflow in the address parsing in
907: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 908: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 909: OpenSSH versions prior to 3.7 contains a buffer management error
910: that is potentially exploitable.</a>
1.294 david 911: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 912: Fix for a potential security issue in
913: sendmail(8) with respect to DNS maps.</a>
1.294 david 914: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 915: An off-by-one error exists in the C library function realpath(3)
916: may allow an attacker to gain escalated privileges.</a>
1.294 david 917: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 918: A buffer overflow in the address parsing in
919: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 920: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 921: A cryptographic weaknesses in the Kerberos v4 protocol can be
922: exploited on Kerberos v5 as well.</a>
1.294 david 923: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 924: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 925: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 926: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 927: Various SSL and TLS operations in OpenSSL are vulnerable to
928: timing attacks.</a>
1.294 david 929: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 930: A buffer overflow in lprm(1) may allow an attacker to elevate
931: privileges to user daemon.</a>.
1.294 david 932: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 933: A buffer overflow in the envelope comments processing in
934: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 935: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 936: httpd(8) leaks file inode numbers via ETag header as well as
937: child PIDs in multipart MIME boundary generation. This could
938: lead, for example, to NFS exploitation because it uses inode
939: numbers as part of the file handle.</a>
1.294 david 940: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 941: In ssl(8) an information leak can occur via timing by performing
942: a MAC computation even if incorrect block cipher padding has
943: been found, this is a countermeasure. Also, check for negative
944: sizes, in allocation routines.</a>
1.294 david 945: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 946: A double free exists in cvs(1) that could lead to privilege
947: escalation for cvs configurations where the cvs command is
1.233 margarid 948: run as a privileged user.</a>
1.294 david 949: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 950: A buffer overflow exists in named(8) that could lead to a
951: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 952: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 953: A logic error in the pool kernel memory allocator could cause
954: memory corruption in low-memory situations, causing the system
955: to crash.</a>
1.294 david 956: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 957: An attacker can bypass smrsh(8)'s restrictions and execute
958: arbitrary commands with the privileges of his own account.</a>
1.294 david 959: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 960: Network bridges running pf with scrubbing enabled could cause
961: mbuf corruption, causing the system to crash.</a>
1.294 david 962: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 963: A buffer overflow can occur in the kadmind(8) daemon, leading
964: to possible remote crash or exploit.</a>
1.224 deraadt 965: </ul>
966:
1.227 miod 967: <p>
968: <li>
1.288 matthieu 969: <a name="31"></a>
1.203 deraadt 970:
1.294 david 971: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 972: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 973: in <a href="anoncvs.html">OpenBSD current</a>. The
974: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 975: you should update your machine.
1.203 deraadt 976:
977: <p>
978: <ul>
1.294 david 979: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 980: A buffer overflow in the address parsing in
981: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 982: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 983: A cryptographic weaknesses in the Kerberos v4 protocol can be
984: exploited on Kerberos v5 as well.</a>
1.294 david 985: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 986: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 987: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 988: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 989: Various SSL and TLS operations in OpenSSL are vulnerable to
990: timing attacks.</a>
1.294 david 991: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 992: A buffer overflow in lprm(1) may allow an attacker to gain
993: root privileges.</a>
1.294 david 994: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 995: A buffer overflow in the envelope comments processing in
996: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 997: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 998: In ssl(8) an information leak can occur via timing by performing
999: a MAC computation even if incorrect block cipher padding has
1000: been found, this is a countermeasure. Also, check for negative
1001: sizes, in allocation routines.</a>
1.294 david 1002: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1003: A double free exists in cvs(1) that could lead to privilege
1004: escalation for cvs configurations where the cvs command is
1.294 david 1005: run as a privileged user</a>.
1006: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1007: A buffer overflow exists in named(8) that could lead to a
1008: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1009: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1010: Incorrect argument checking in the getitimer(2) system call
1011: may allow an attacker to crash the system.</a>
1.294 david 1012: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1013: An attacker can bypass smrsh(8)'s restrictions and execute
1014: arbitrary commands with the privileges of his own account.</a>
1.294 david 1015: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1016: A buffer overflow can occur in the kadmind(8) daemon, leading
1017: to possible remote crash or exploit.</a>
1.294 david 1018: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1019: Incorrect argument checking in the setitimer(2) system call
1020: may allow an attacker to write to kernel memory.</a>
1.294 david 1021: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1022: An insufficient boundary check in the select system call
1.220 miod 1023: allows an attacker to overwrite kernel memory and execute arbitrary code
1024: in kernel context.</a>
1.294 david 1025: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1026: Several remote buffer overflows can occur in the SSL2 server and SSL3
1027: client of the ssl(8) library, as in the ASN.1 parser code in the
1028: crypto(3) library, all of them being potentially remotely
1029: exploitable.</a>
1.294 david 1030: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1031: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1032: possible remote crash.</a>
1.294 david 1033: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1034: A race condition exists in the pppd(8) daemon which may cause it to
1035: alter the file permissions of an arbitrary file.</a>
1.294 david 1036: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1037: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1038: crash.</a>
1.294 david 1039: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1040: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1041: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1042: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1043: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1044: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1045: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1046: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1047: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1048: input validation error that can result in an integer overflow and
1049: privilege escalation.</a>
1.294 david 1050: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1051: A buffer overflow can occur during the interpretation of chunked
1052: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1053: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1054: Under certain conditions, on systems using YP with netgroups
1055: in the password database, it is possible that sshd(8) does
1056: ACL checks for the requested user name but uses the password
1057: database entry of a different user for authentication. This
1058: means that denied users might authenticate successfully
1059: while permitted users could be locked out.</a>
1.294 david 1060: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1061: A race condition exists that could defeat the kernel's
1062: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1063: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1064: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1065: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1066: A local user can gain super-user privileges due to a buffer
1067: overflow in sshd(8) if AFS has been configured on the system
1068: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1069: in the sshd_config file.</a>
1.203 deraadt 1070: </ul>
1071:
1.235 miod 1072: <p>
1.203 deraadt 1073: <li>
1.288 matthieu 1074: <a name="30"></a>
1.187 deraadt 1075:
1.294 david 1076: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1077: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1078: in <a href="anoncvs.html">OpenBSD current</a>. The
1079: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1080: you should update your machine.
1.187 deraadt 1081:
1082: <p>
1083: <ul>
1.294 david 1084: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1085: A buffer overflow exists in named(8) that could lead to a
1086: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1087: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1088: Incorrect argument checking in the getitimer(2) system call
1089: may allow an attacker to crash the system.</a>
1.294 david 1090: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1091: An attacker can bypass smrsh(8)'s restrictions and execute
1092: arbitrary commands with the privileges of his own account.</a>
1.294 david 1093: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1094: A buffer overflow can occur in the kadmind(8) daemon, leading
1095: to possible remote crash or exploit.</a>
1.294 david 1096: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1097: Incorrect argument checking in the setitimer(2) system call
1098: may allow an attacker to write to kernel memory.</a>
1.294 david 1099: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1100: An insufficient boundary check in the select and poll system calls
1101: allows an attacker to overwrite kernel memory and execute arbitrary code
1102: in kernel context.</a>
1.294 david 1103: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1104: Several remote buffer overflows can occur in the SSL2 server and SSL3
1105: client of the ssl(8) library, as in the ASN.1 parser code in the
1106: crypto(3) library, all of them being potentially remotely
1107: exploitable.</a>
1.294 david 1108: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1109: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1110: possible remote crash.</a>
1.294 david 1111: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1112: A race condition exists in the pppd(8) daemon which may cause it to
1113: alter the file permissions of an arbitrary file.</a>
1.294 david 1114: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1115: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1116: crash.</a>
1.294 david 1117: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1118: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1119: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1120: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1121: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1122: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1123: input validation error that can result in an integer overflow and
1124: privilege escalation.</a>
1.294 david 1125: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1126: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1127: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1128: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1129: A buffer overflow can occur during the interpretation of chunked
1130: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1131: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1132: A race condition exists that could defeat the kernel's
1133: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1134: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1135: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1136: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1137: A local user can gain super-user privileges due to a buffer
1138: overflow in sshd(8) if AFS has been configured on the system
1139: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1140: in the sshd_config file.</a>
1.294 david 1141: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1142: The mail(1) was interpreting tilde escapes even when invoked
1143: in non-interactive mode. As mail(1) is called as root from cron,
1144: this can lead to a local root compromise.</a>
1.294 david 1145: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1146: Under certain conditions, on systems using YP with netgroups in
1147: the password database, it is possible for the rexecd(8) and rshd(8)
1148: daemons to execute a shell from a password database entry for a
1149: different user. Similarly, atrun(8) may change to the wrong
1150: home directory when running jobs.</a>
1.294 david 1151: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1152: A potential double free() exists in the zlib library;
1153: this is not exploitable on OpenBSD.
1154: The kernel also contains a copy of zlib; it is not
1155: currently known if the kernel zlib is exploitable.</a>
1.294 david 1156: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1157: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1158: may allow a local user to gain super-user privileges.</a>
1.294 david 1159: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1160: A race condition between the ptrace(2) and execve(2) system calls
1161: allows an attacker to modify the memory contents of suid/sgid
1162: processes which could lead to compromise of the super-user account.</a>
1.294 david 1163: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1164: There is a security hole in sudo(8) that can be exploited
1165: when the Postfix sendmail replacement is installed that may
1166: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1167: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1168: An attacker can trick a machine running the lpd daemon into
1169: creating new files in the root directory from a machine with
1170: remote line printer access.</a>
1.294 david 1171: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1172: The vi.recover script can be abused in such a way as
1173: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1174: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1175: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1176: resulting in a crash.</a>
1.294 david 1177: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1178: A security hole that may allow an attacker to partially authenticate
1179: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1180: </ul>
1181:
1182: <p>
1183: <li>
1.288 matthieu 1184: <a name="29"></a>
1.173 deraadt 1185:
1.294 david 1186: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1187: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1188: in <a href="anoncvs.html">OpenBSD current</a>. The
1189: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1190: you should update your machine.
1191:
1.173 deraadt 1192:
1193: <p>
1194: <ul>
1.294 david 1195: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1196: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1197: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1198: A race condition exists that could defeat the kernel's
1199: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1200: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1201: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1202: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1203: A local user can gain super-user privileges due to a buffer
1204: overflow in sshd(8) if AFS has been configured on the system
1205: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1206: in the sshd_config file.</a>
1.294 david 1207: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1208: The mail(1) was interpreting tilde escapes even when invoked
1209: in non-interactive mode. As mail(1) is called as root from cron,
1210: this can lead to a local root compromise.</a>
1.294 david 1211: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1212: A potential double free() exists in the zlib library;
1213: this is not exploitable on OpenBSD.
1214: The kernel also contains a copy of zlib; it is not
1215: currently known if the kernel zlib is exploitable.</a>
1.294 david 1216: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1217: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1218: may allow a local user to gain super-user privileges.</a>
1.294 david 1219: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1220: A race condition between the ptrace(2) and execve(2) system calls
1221: allows an attacker to modify the memory contents of suid/sgid
1222: processes which could lead to compromise of the super-user account.</a>
1.294 david 1223: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1224: There is a security hole in sudo(8) that can be exploited
1225: when the Postfix sendmail replacement is installed that may
1226: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1227: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1228: An attacker can trick a machine running the lpd daemon into
1229: creating new files in the root directory from a machine with
1230: remote line printer access.</a>
1.294 david 1231: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1232: The vi.recover script can be abused in such a way as
1233: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1234: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1235: A security hole exists in uuxqt(8) that may allow an
1236: attacker to gain root privileges.</a>
1.294 david 1237: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1238: A security hole exists in lpd(8) that may allow an
1239: attacker to gain root privileges if lpd is running.</a>
1.294 david 1240: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1241: A security hole exists in sendmail(8) that may allow an
1242: attacker on the local host to gain root privileges.</a>
1.294 david 1243: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1244: A kernel buffer overflow in the NFS code can be used to execute
1245: arbitrary code by users with mount privileges (only root by
1.181 millert 1246: default).</a>
1.294 david 1247: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1248: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1249: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1250: sshd(8) allows users to delete arbitrary files named "cookies"
1251: if X11 forwarding is enabled. X11 forwarding is disabled
1252: by default.</a>
1.294 david 1253: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1254: Programs using the fts routines can be tricked into changing
1255: into the wrong directory.</a>
1.294 david 1256: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1257: Sendmail signal handlers contain unsafe code,
1258: leading to numerous race conditions.</a>
1.173 deraadt 1259: </ul>
1260:
1261: <p>
1262: <li>
1.288 matthieu 1263: <a name="28"></a>
1.152 deraadt 1264:
1.294 david 1265: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1266: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1267: in <a href="anoncvs.html">OpenBSD current</a>. The
1268: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1269: you should update your machine.
1270:
1.152 deraadt 1271:
1272: <p>
1273: <ul>
1.294 david 1274: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1275: A security hole exists in uuxqt(8) that may allow an
1276: attacker to gain root privileges.</a>
1.294 david 1277: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1278: A security hole exists in lpd(8) that may allow an
1279: attacker to gain root privileges if lpd is running.</a>
1.294 david 1280: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1281: A security hole exists in sendmail(8) that may allow an
1282: attacker on the local host to gain root privileges.</a>
1.294 david 1283: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1284: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1285: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1286: Programs using the fts routines can be tricked into changing
1287: into the wrong directory.</a>
1.294 david 1288: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1289: Sendmail signal handlers contain unsafe code,
1290: leading to numerous race conditions.</a>
1.294 david 1291: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1292: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1293: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1294: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1295: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1296: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1297: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1298: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1299: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1300: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1301: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1302: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1303: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1304: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1305: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1306: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1307: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1308: rnd(4) did not use all of its input when written to.</a>
1.294 david 1309: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1310: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1311: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1312: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1313: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1314: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1315: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1316: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1317: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1318: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1319: </ul>
1320:
1321: <p>
1322: <li>
1.288 matthieu 1323: <a name="27"></a>
1.124 deraadt 1324:
1.294 david 1325: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1326: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1327: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1328: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1329:
1330: <p>
1331: <ul>
1.294 david 1332: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1333: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1334: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1335: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1336: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1337: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1338: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1339: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1340: (patch included)</a>
1.294 david 1341: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1342: X11 libraries have 2 potential overflows in xtrans code.
1343: (patch included)</a>
1.294 david 1344: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1345: Apache mod_rewrite and mod_vhost_alias modules could expose files
1346: on the server in certain configurations if used.
1347: (patch included)</a>
1.294 david 1348: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1349: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1350: TERMPATH and TERMCAP environment variables as it should.
1351: (patch included)</a>
1.294 david 1352: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1353: There are printf-style format string bugs in several privileged
1354: programs. (patch included)</a>
1.294 david 1355: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1356: libcurses honored terminal descriptions in the $HOME/.terminfo
1357: directory as well as in the TERMCAP environment variable for
1358: setuid and setgid applications.
1.146 deraadt 1359: (patch included)</a>
1.294 david 1360: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1361: A format string vulnerability exists in talkd(8).
1362: (patch included)</a>
1.294 david 1363: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1364: A format string vulnerability exists in the pw_error() function of the
1365: libutil library, yielding localhost root through chpass(1).
1366: (patch included)</a>
1.294 david 1367: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1368: Bad ESP/AH packets could cause a crash under certain conditions.
1369: (patch included)</a>
1.294 david 1370: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1371: A format string vulnerability (localhost root) exists in xlock(1).
1372: (patch included)</a>
1.294 david 1373: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1374: Various bugs found in X11 libraries have various side effects, almost
1375: completely denial of service in OpenBSD.
1376: (patch included)</a>
1.294 david 1377: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1378: Just like pretty much all the other unix ftp daemons
1379: on the planet, ftpd had a remote root hole in it.
1380: Luckily, ftpd was not enabled by default.
1.137 deraadt 1381: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1382: (patch included)</a>
1.294 david 1383: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1384: Mopd, very rarely used, contained some buffer overflows.
1385: (patch included)</a>
1.294 david 1386: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1387: libedit would check for a <b>.editrc</b> file in the current
1388: directory. Not known to be a real security issue, but a patch
1389: is available anyways.
1390: (patch included)</a>
1.294 david 1391: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1392: A serious bug in dhclient(8) could allow strings from a
1393: malicious dhcp server to be executed in the shell as root.
1394: (patch included)</a>
1.294 david 1395: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1396: A serious bug in isakmpd(8) policy handling wherein
1397: policy verification could be completely bypassed in isakmpd.
1398: (patch included)</a>
1.294 david 1399: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1400: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1401: should not be used, and results in security problems on
1402: other operating systems.</a>
1.294 david 1403: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1404: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1405: (patch included)</a>
1.294 david 1406: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1407: Improper use of ipf <i>keep-state</i> rules can result
1408: in firewall rules being bypassed. (patch included)</a>
1409:
1.124 deraadt 1410: </ul>
1411:
1412: <p>
1413: <li>
1.288 matthieu 1414: <a name="26"></a>
1.119 deraadt 1415:
1.294 david 1416: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1417: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1418: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1419: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1420:
1421: <p>
1422: <ul>
1.294 david 1423: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1424: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1425: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1426: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1427: Improper use of ipf <i>keep-state</i> rules can result
1428: in firewall rules being bypassed. (patch included)</a>
1.294 david 1429: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1430: xlockmore has a bug which a localhost attacker can use to gain
1431: access to the encrypted root password hash (which is normally
1.245 miod 1432: encoded using blowfish</a> (see
1.294 david 1433: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1434: crypt(3)</a>)
1.245 miod 1435: (patch included).
1.294 david 1436: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1437: Systems running with procfs enabled and mounted are
1438: vulnerable to a very tricky exploit. procfs is not
1439: mounted by default.
1440: (patch included).</a>
1.294 david 1441: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1442: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1443: thus exposing the system to a race where the aliases file
1444: did not exist.
1.119 deraadt 1445: (patch included).</a>
1.294 david 1446: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1447: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1448: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1449: A buffer overflow in the RSAREF code included in the
1450: USA version of libssl, is possibly exploitable in
1451: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1452: (patch included).<br></a>
1453: <strong>Update:</strong> Turns out that this was not exploitable
1454: in any of the software included in OpenBSD 2.6.
1.294 david 1455: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1456: Any user could change interface media configurations, resulting in
1457: a localhost denial of service attack.
1.121 deraadt 1458: (patch included).</a>
1.119 deraadt 1459: </ul>
1460:
1461: <p>
1462: <li>
1.288 matthieu 1463: <a name="25"></a>
1.106 deraadt 1464:
1.294 david 1465: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1466: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1467: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1468: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1469:
1.96 deraadt 1470: <p>
1.104 deraadt 1471: <ul>
1.294 david 1472: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1473: In cron(8), make sure argv[] is NULL terminated in the
1474: fake popen() and run sendmail as the user, not as root.
1475: (patch included).</a>
1.294 david 1476: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1477: filesystems had an overrun in their handling of uio_offset
1478: in their readdir() routines. (These filesystems are not
1479: enabled by default). (patch included).</a>
1.294 david 1480: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1481: when we execve() a new process. (patch included).</a>
1.294 david 1482: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1483: been handled by IPsec may be transmitted as cleartext.
1484: PF_KEY SA expirations may leak kernel resources.
1485: (patch included).</a>
1.294 david 1486: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1487: motd re-writing and change the find(1) to use -execdir
1488: (patch included).</a>
1.294 david 1489: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1490: users to chflags(2) or fchflags(2) on character or block devices
1491: which they may currently be the owner of (patch included).</a>
1.294 david 1492: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1493: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1494: </ul>
1495:
1.106 deraadt 1496: <p>
1497: <li>
1.288 matthieu 1498: <a name="24"></a>
1.235 miod 1499:
1.294 david 1500: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1501: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1502: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1503: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1504:
1.96 deraadt 1505: <p>
1.75 deraadt 1506: <ul>
1.294 david 1507: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1508: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1509: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1510: another kernel crash case caused by the <strong>crashme</strong>
1511: program (patch included).</a>
1.294 david 1512: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1513: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1514: (patch included).</a>
1.294 david 1515: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1516: existed in ping(8). (patch included).</a>
1.294 david 1517: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1518: the ipq, which could permit an attacker to cause a crash.
1519: (patch included).</a>
1.294 david 1520: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1521: kernel between accept(2) and select(2) could permit an attacker
1522: to hang sockets from remote.
1523: (patch included).</a>
1.294 david 1524: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1525: bog the machine excessively and cause problems.
1526: (patch included).</a>
1.294 david 1527: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1528: DDB interacted to possibly cause a crash.
1529: (patch included).</a>
1.294 david 1530: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1531: (patch included).</a>
1.294 david 1532: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1533: problem in bootpd(8). (patch included).</a>
1.294 david 1534: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1535: exploitable problem relating to environment variables in termcap
1536: and curses. (patch included).</a>
1.294 david 1537: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1538: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1539: </ul>
1540:
1.106 deraadt 1541: <p>
1542: <li>
1.288 matthieu 1543: <a name="23"></a>
1.235 miod 1544:
1.294 david 1545: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1546: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1547: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1548: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1549:
1.96 deraadt 1550: <p>
1.53 matthieu 1551: <ul>
1.294 david 1552: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1553: problem in bootpd(8). (patch included).</a>
1.294 david 1554: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1555: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1556: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1557: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1558: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1559: chpass(1) has a file descriptor leak which allows an
1560: attacker to modify /etc/master.passwd.</a>
1.294 david 1561: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1562: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1563: should not be executed with fd slots 0, 1, or 2 free.
1564: (patch included).</a>
1.294 david 1565: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1566: libraries (patches included).</a>
1.294 david 1567: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1568: processes too permissive (4th revision patch included).</a>
1.294 david 1569: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1570: of immutable and append-only file flags. (patch included).</a>
1.294 david 1571: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1572: if IPSEC is enabled (patch included).</a>
1.294 david 1573: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1574: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1575: </ul>
1.9 deraadt 1576:
1.106 deraadt 1577: <p>
1578: <li>
1.288 matthieu 1579: <a name="22"></a>
1.235 miod 1580:
1.294 david 1581: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1582: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1583: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1584: still exist in other operating systems. (The supplied patches are for
1585: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1586:
1.96 deraadt 1587: <p>
1.9 deraadt 1588: <ul>
1.294 david 1589: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1590: packets if IPSEC is enabled (patch included).</a>
1.294 david 1591: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1592: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1593: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1594: (patch included).</a>
1.294 david 1595: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1596: (patch included).</a>
1.294 david 1597: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1598: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1599: (patch included).</a>
1.294 david 1600: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1601: export (patch included).</a>
1.112 philen 1602: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1603: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1604: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1605: Acceptance.</a>
1.294 david 1606: A patch is available <a href="errata22.html#sourceroute">here</a>.
1607: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1608: flaw (patch included).</a>
1.294 david 1609: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1610: </ul>
1611:
1.106 deraadt 1612: <p>
1613: <li>
1.288 matthieu 1614: <a name="21"></a>
1.235 miod 1615:
1.294 david 1616: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1617: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1618: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1619: exist in other operating systems. (If you are running OpenBSD 2.1, we
1620: would strongly recommend an upgrade to the newest release, as this
1621: patch list only attempts at fixing the most important security
1622: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1623: security problems. Many of those problems were solved in ways which
1624: make it hard for us to provide patches).
1625:
1.96 deraadt 1626: <p>
1.52 deraadt 1627: <ul>
1.112 philen 1628: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1629: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1630: (patch included)</a>
1.112 philen 1631: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1632: </ul>
1.51 deraadt 1633:
1.106 deraadt 1634: <p>
1635: <li>
1.288 matthieu 1636: <a name="20"></a>
1.235 miod 1637:
1.294 david 1638: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1639: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1640: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1641: exist in other operating systems. (If you are running OpenBSD 2.0, we
1642: commend you for being there back in the old days!, but you're really
1643: missing out if you don't install a new version!)
1644:
1645: <p>
1646: <ul>
1.112 philen 1647: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1648: resolver (patch included)</a>
1649: <li>Many others... if people can hunt them down, please let me know
1650: and we'll put them up here.
1651: </ul>
1.51 deraadt 1652: <p>
1.106 deraadt 1653:
1.288 matthieu 1654: <a name="watching"></a>
1.294 david 1655: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1656:
1.21 deraadt 1657: Since we take a proactive stance with security, we are continually
1658: finding and fixing new security problems. Not all of these problems
1.80 espie 1659: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1660: confirmed to be exploitable; many simple bugs we fix do turn out to
1661: have security consequences we could not predict. We do not have the
1662: time resources to make these changes available in the above format.<p>
1.21 deraadt 1663:
1664: Thus there are usually minor security fixes in the current source code
1665: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1666: guarantee that these problems are of minimal impact and unproven
1.44 ian 1667: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1668: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1669:
1.45 deraadt 1670: People who are really concerned with security can do a number of
1671: things:<p>
1.21 deraadt 1672:
1673: <ul>
1674: <li>If you understand security issues, watch our
1.294 david 1675: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1676: eye out for things which appear security related. Since
1.21 deraadt 1677: exploitability is not proven for many of the fixes we make,
1678: do not expect the relevant commit message to say "SECURITY FIX!".
1679: If a problem is proven and serious, a patch will be available
1680: here very shortly after.
1.161 horacio 1681: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1682: security-announce mailing list</a> which will notify you for every
1.186 ian 1683: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1684: and instruct you on how to patch the problem.
1.21 deraadt 1685: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1686: complete system build from time to time (read /usr/src/Makefile
1687: carefully). Users can make the assumption that the current
1688: source tree always has stronger security than the previous release.
1.45 deraadt 1689: However, building your own system from source code is not trivial;
1.265 miod 1690: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1691: transition between major releases.
1.115 ericj 1692: <li>Install a binary snapshot for your
1.80 espie 1693: architecture, which are made available fairly often. For
1.29 deraadt 1694: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1695: </ul>
1696:
1.9 deraadt 1697: <p>
1.288 matthieu 1698: <a name="reporting"></a>
1.294 david 1699: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1700:
1.5 deraadt 1701: <p> If you find a new security problem, you can mail it to
1.294 david 1702: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1703: <br>
1.5 deraadt 1704: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1705: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1706:
1.107 deraadt 1707: <p>
1.288 matthieu 1708: <a name="papers"></a>
1.294 david 1709: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1710:
1711: A number of papers have been written by OpenBSD team members, about security
1712: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1713: documents are available as follows.<p>
1.107 deraadt 1714:
1715: <ul>
1.113 deraadt 1716: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1717: <a href="events.html#usenix99">Usenix 1999</a>,
1718: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1719: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1720: <a href="papers/bcrypt-paper.ps">paper</a> and
1721: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1722: <p>
1723: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1724: <a href="events.html#usenix99">Usenix 1999</a>,
1725: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1726: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1727: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1728: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1729: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1730: <a href="papers/crypt-paper.ps">paper</a> and
1731: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1732: <p>
1733: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1734: <a href="events.html#usenix99">Usenix 1999</a>,
1735: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1736: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1737: <a href="papers/strlcpy-paper.ps">paper</a> and
1738: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1739: <p>
1.118 deraadt 1740: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1741: <a href="events.html#lisa99">LISA 1999</a>,
1742: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1743: <a href="papers/authgw-paper.ps">paper</a> and
1744: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1745: <p>
1.153 jufi 1746: <li>Encrypting Virtual Memory<br>
1.294 david 1747: <a href="events.html#sec2000">Usenix Security 2000</a>,
1748: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1749: <a href="papers/swapencrypt.ps">paper</a> and
1750: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1751: <p>
1.107 deraadt 1752: </ul>
1.294 david 1753: </ul>
1.106 deraadt 1754:
1.2 deraadt 1755: <hr>
1.294 david 1756: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1757: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1758: <br>
1.378 ! jasper 1759: <small>$OpenBSD: security.html,v 1.377 2009/05/03 12:42:47 tobias Exp $</small>
1.1 deraadt 1760:
1.24 deraadt 1761: </body>
1762: </html>
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