Annotation of www/security.html, Revision 1.383
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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>
1.383 ! sthen 244: <li><a href="errata46.html#004_openssl">November 26, 2009:
! 245: The SSL/TLS protocol is subject to man-in-the-middle attacks
! 246: related to renegotiation</a>.
1.378 jasper 247: </ul>
1.382 tobias 248:
249: <li>
1.373 djm 250: <a name="45"></a>
251:
252: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
253: These are the OpenBSD 4.5 advisories -- all these problems are solved
254: in <a href=anoncvs.html>OpenBSD current</a> and the
255: <a href=stable.html>patch branch</a>.
256:
257: <p>
258: <ul>
1.383 ! sthen 259: <li><a href="errata45.html#010_openssl">November 26, 2009:
! 260: The SSL/TLS protocol is subject to man-in-the-middle attacks
! 261: related to renegotiation</a>.
1.373 djm 262: </ul>
263:
1.382 tobias 264: <p>
265: OpenBSD 4.4 and earlier releases are not supported anymore. The following
266: paragraphs only list advisories issued while they were maintained; these
267: releases are likely to be affected by the advisories for more recent releases.
268: <br>
269:
1.373 djm 270: <li>
1.365 deraadt 271: <a name="44"></a>
272:
273: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
274: These are the OpenBSD 4.4 advisories -- all these problems are solved
275: in <a href=anoncvs.html>OpenBSD current</a> and the
276: <a href=stable.html>patch branch</a>.
277:
278: <p>
279: <ul>
1.372 millert 280: <li><a href="errata44.html#011_sudo">February 22, 2009:
281: sudo(8) may allow a user listed in sudoers to run a command
282: as a different user than their access rule specifies when a Unix
283: group is used in the RunAs portion of the rule.</a>
1.370 djm 284: <li><a href="errata44.html#008_bind">January 15, 2009:
285: named(8) suffered from a similar logic error that may allow
286: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 287: <li><a href="errata44.html#007_openssl">January 9, 2009:
288: OpenSSL suffered from some logic errors that allowed bypass
289: of DSA/ECDSA certificate validation.</a>
1.367 brad 290: <li><a href="errata44.html#001_ndp">November 2, 2008:
291: The Neighbor Discovery Protocol (ndp) did not correctly verify
292: neighbor solicitation requests maybe allowing a nearby attacker
293: to intercept traffic.</a>
1.365 deraadt 294: </ul>
295:
296: <li>
1.357 brad 297: <a name="43"></a>
298:
299: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
300: These are the OpenBSD 4.3 advisories -- all these problems are solved
301: in <a href=anoncvs.html>OpenBSD current</a> and the
302: <a href=stable.html>patch branch</a>.
303:
304: <p>
305: <ul>
1.372 millert 306: <li><a href="errata43.html#011_sudo">February 22, 2009:
307: sudo(8) may allow a user listed in sudoers to run a command
308: as a different user than their access rule specifies when a Unix
309: group is used in the RunAs portion of the rule.</a>
1.370 djm 310: <li><a href="errata43.html#008_bind">January 15, 2009:
311: named(8) suffered from a similar logic error that may allow
312: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 313: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 314: OpenSSL suffered from some logic errors that allowed bypass
315: of DSA/ECDSA certificate validation.</a>
1.382 tobias 316: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 317: The Neighbor Discovery Protocol (ndp) did not correctly verify
318: neighbor solicitation requests maybe allowing a nearby attacker
319: to intercept traffic.</a>
1.362 brad 320: <li><a href="errata43.html#004_bind">July 23, 2008:
321: A vulnerability has been found with BIND.</a>
1.361 brad 322: <li><a href="errata43.html#003_xorg">July 15, 2008:
323: Multiple vulnerabilities in X.Org.</a>
1.359 brad 324: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 325: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 326: <li><a href="errata43.html#001_openssh">March 30, 2008:
327: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 328: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 329: </ul>
330:
331: <li>
1.348 merdely 332: <a name="42"></a>
333: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
334: These are the OpenBSD 4.2 advisories -- all these problems are solved
335: in <a href=anoncvs.html>OpenBSD current</a> and the
336: <a href=stable.html>patch branch</a>.
337:
338: <p>
339: <ul>
1.364 tobias 340: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 341: The Neighbor Discovery Protocol (ndp) did not correctly verify
342: neighbor solicitation requests maybe allowing a nearby attacker
343: to intercept traffic.</a>
1.362 brad 344: <li><a href="errata42.html#013_bind">July 23, 2008:
345: A vulnerability has been found with BIND.</a>
1.361 brad 346: <li><a href="errata42.html#012_xorg2">July 15, 2008:
347: Multiple vulnerabilities in X.Org.</a>
1.359 brad 348: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 349: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 350: <li><a href="errata42.html#010_openssh">March 30, 2008:
351: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 352: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 353: <li><a href="errata42.html#009_ppp">March 7, 2008:
354: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 355: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
356: Multiple vulnerabilities in X.Org.</a>
1.351 okan 357: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
358: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 359: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 360: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 361: </ul>
362:
363: <li>
1.346 matthieu 364: <a name="41"></a>
365:
366: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
367: These are the OpenBSD 4.1 advisories -- all these problems are solved
368: in <a href=anoncvs.html>OpenBSD current</a> and the
369: <a href=stable.html>patch branch</a>.
370:
371: <p>
372: <ul>
1.359 brad 373: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 374: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 375: <li><a href="errata41.html#015_openssh">March 30, 2008:
376: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 377: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 378: <li><a href="errata41.html#014_ppp">March 7, 2008:
379: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 380: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
381: Multiple vulnerabilities in X.Org.</a>
382: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
383: The SSL_get_shared_ciphers() function in OpenSSL contains
384: an off-by-one overflow.</a>
1.350 deraadt 385: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 386: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 387: <li><a href="errata41.html#009_file">Jul 9, 2007:
388: Fix possible heap overflow in file(1).</a>
1.346 matthieu 389: <li><a href="errata41.html#005_route6">Apr 27, 2007:
390: IPv6 type 0 route headers can be used to mount a DoS attack
391: against hosts and networks.</a>
392: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
393: Multiple vulnerabilities in X.Org.</a>
394: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
395: Incorrect mbuf handling for ICMP6 packets.</a>
396: </ul>
397:
398: <li>
1.334 brad 399: <a name="40"></a>
400: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
401: These are the OpenBSD 4.0 advisories -- all these problems are solved
402: in <a href=anoncvs.html>OpenBSD current</a> and the
403: <a href=stable.html>patch branch</a>.
404:
405: <p>
406: <ul>
1.382 tobias 407: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
408: The SSL_get_shared_ciphers() function in OpenSSL contains an
409: off-by-one overflow.</a>
1.350 deraadt 410: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 411: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 412: <li><a href="errata40.html#015_file">Jul 9, 2007:
413: Fix possible heap overflow in file(1).</a>
1.343 deraadt 414: <li><a href="errata40.html#012_route6">Apr 23, 2007:
415: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 416: against hosts and networks.</a>
1.342 mbalmer 417: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
418: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 419: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
420: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 421: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 422: Insufficient validation in vga(4) may allow an attacker to gain
423: root privileges on some i386 systems.</a>
1.339 deraadt 424: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 425: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 426: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 427: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
428: found by Chris Evans.</a>
1.339 deraadt 429: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 430: Several problems have been found in OpenSSL.</a>
1.339 deraadt 431: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 432: httpd(8) does not sanitize the Expect header from an HTTP request
433: when it is reflected back in an error message, which might allow
434: cross-site scripting (XSS) style attacks.</a>
435: </ul>
436:
437: <li>
1.321 brad 438: <a name="39"></a>
439:
440: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
441: These are the OpenBSD 3.9 advisories -- all these problems are solved
442: in <a href=anoncvs.html>OpenBSD current</a> and the
443: <a href=stable.html>patch branch</a>.
444:
445: <p>
446: <ul>
1.343 deraadt 447: <li><a href="errata39.html#022_route6">Apr 23, 2007:
448: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 449: against hosts and networks.</a>
1.342 mbalmer 450: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
451: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 452: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
453: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 454: <li><a href="errata39.html#agp">Jan 3, 2007:
455: Insufficient validation in vga(4) may allow an attacker to gain
456: root privileges on some i386 systems.</a>
1.336 brad 457: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 458: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 459: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 460: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 461: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 462: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 463: found by Chris Evans.</a>
1.333 deraadt 464: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 465: Several problems have been found in OpenSSL.</a>
1.333 deraadt 466: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 467: httpd(8) does not sanitize the Expect header from an HTTP request
468: when it is reflected back in an error message, which might allow
469: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 470: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 471: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
472: possible for an attacker to construct an invalid signature which
473: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 474: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 475: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 476: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 477: Due to the failure to correctly validate LCP configuration option
478: lengths, it is possible for an attacker to send LCP packets via an
479: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 480: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 481: A problem in isakmpd(8) caused IPsec to run partly without replay
482: protection.</a>
1.333 deraadt 483: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 484: It is possible to cause the kernel to panic when more than the default
485: number of sempahores have been allocated.</a>
1.333 deraadt 486: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 487: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
488: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
489: option.</a>
1.333 deraadt 490: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 491: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 492: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 493: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
494: overflow.</a>
1.333 deraadt 495: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 496: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 497: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 498: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 499: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 500: A race condition has been reported to exist in the handling by sendmail
501: of asynchronous signals.</a>
502: </ul>
503:
504: <li>
1.318 deraadt 505: <a name="38"></a>
506:
507: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
508: These are the OpenBSD 3.8 advisories -- all these problems are solved
509: in <a href=anoncvs.html>OpenBSD current</a> and the
510: <a href=stable.html>patch branch</a>.
511:
512: <p>
513: <ul>
1.332 brad 514: <li><a href="errata38.html#ssh2">Oct 12, 2006:
515: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 516: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 517: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 518: found by Chris Evans.</a>
519: <li><a href="errata38.html#openssl2">Oct 7, 2006:
520: Several problems have been found in OpenSSL.</a>
521: <li><a href="errata38.html#httpd2">Oct 7, 2006:
522: httpd(8) does not sanitize the Expect header from an HTTP request
523: when it is reflected back in an error message, which might allow
524: cross-site scripting (XSS) style attacks.</a>
1.329 brad 525: <li><a href="errata38.html#openssl">Sep 8, 2006:
526: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
527: possible for an attacker to construct an invalid signature which
528: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 529: <li><a href="errata38.html#bind">Sep 8, 2006:
530: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 531: <li><a href="errata38.html#sppp">Sep 2, 2006:
532: Due to the failure to correctly validate LCP configuration option
533: lengths, it is possible for an attacker to send LCP packets via an
534: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 535: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
536: A problem in isakmpd(8) caused IPsec to run partly without replay
537: protection.</a>
538: <li><a href="errata38.html#sem">Aug 25, 2006:
539: It is possible to cause the kernel to panic when more than the default
540: number of sempahores have been allocated.</a>
541: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
542: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
543: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
544: option.</a>
545: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
546: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 547: <li><a href="errata38.html#httpd">Jul 30, 2006:
548: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
549: overflow.</a>
1.324 brad 550: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
551: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 552: <li><a href="errata38.html#xorg">May 2, 2006:
553: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 554: <li><a href="errata38.html#sendmail">Mar 25, 2006:
555: A race condition has been reported to exist in the handling by sendmail
556: of asynchronous signals.</a>
557: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 558: Josh Bressers has reported a weakness in OpenSSH caused due to the
559: insecure use of the system(3) function in scp(1) when performing copy
560: operations using filenames that are supplied by the user from the
561: command line.</a>
1.321 brad 562: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 563: Do not allow users to trick suid programs into re-opening files via
564: /dev/fd.</a>
1.321 brad 565: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 566: A buffer overflow has been found in the Perl interpreter with the
567: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 568: </ul>
569:
570: <li>
1.312 david 571: <a name="37"></a>
572:
573: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
574: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 575: in <a href="anoncvs.html">OpenBSD current</a>. The
576: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
577: you should update your machine.
1.312 david 578:
579: <p>
580: <ul>
1.322 brad 581: <li><a href="errata37.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="errata37.html#sendmail">Mar 25, 2006:
584: A race condition has been reported to exist in the handling by sendmail
585: of asynchronous signals.</a>
1.320 brad 586: <li><a href="errata37.html#ssh">Feb 12, 2006:
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>
1.319 brad 591: <li><a href="errata37.html#fd">Jan 5, 2006:
592: Do not allow users to trick suid programs into re-opening files via
593: /dev/fd.</a>
594: <li><a href="errata37.html#perl">Jan 5, 2006:
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: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 598: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 599: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 600: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 601: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 602: Fix a race condition in sudo(8) that could allow a user
1.315 millert 603: to run arbitrary commands.</a>
1.318 deraadt 604: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 605: Fix a buffer overflow, memory leaks, and NULL pointer
606: dereference in cvs(1).</a>
1.312 david 607: </ul>
608:
609: <li>
1.301 miod 610: <a name="36"></a>
611:
612: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
613: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 614: in <a href="anoncvs.html">OpenBSD current</a>. The
615: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
616: you should update your machine.
1.301 miod 617:
618: <p>
1.302 markus 619: <ul>
1.317 millert 620: <li><a href="errata36.html#libz2">Jul 21, 2005:
621: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 622: <li><a href="errata36.html#libz">Jul 6, 2005:
623: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 624: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 625: Fix a race condition in sudo(8) that could allow a user
1.315 millert 626: to run arbitrary commands.</a>
1.311 deraadt 627: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 628: Fix a buffer overflow, memory leaks, and NULL pointer
629: dereference in cvs(1).</a>
1.311 deraadt 630: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 631: Due to buffer overflows in telnet(1), a malicious
632: server or man-in-the-middle attack could allow
633: execution of arbitrary code with the privileges of
634: the user invoking telnet(1).</a>
1.311 deraadt 635: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 636: More stringent checking should be done in the copy(9)
637: functions to prevent their misuse.</a>
1.311 deraadt 638: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 639: More stringent checking should be done in the copy(9)
640: functions to prevent their misuse.</a>
1.311 deraadt 641: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 642: httpd(8)'s mod_include module fails to properly validate
643: the length of user supplied tag strings prior to copying
1.305 brad 644: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 645: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 646: On systems running isakmpd(8) it is possible for a local
647: user to cause kernel memory corruption and system panic by
1.303 markus 648: setting ipsec(4) credentials on a socket.</a>
1.302 markus 649: </ul>
1.301 miod 650:
651: <li>
1.288 matthieu 652: <a name="35"></a>
1.279 deraadt 653:
1.294 david 654: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 655: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 656: in <a href="anoncvs.html">OpenBSD current</a>. The
657: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
658: you should update your machine.
1.279 deraadt 659:
660: <p>
661: <ul>
1.310 brad 662: <li><a href="errata35.html#cvs4">Apr 28, 2005:
663: Fix a buffer overflow, memory leaks, and NULL pointer
664: dereference in cvs(1).</a>
1.309 brad 665: <li><a href="errata35.html#telnet">Mar 30, 2005:
666: Due to buffer overflows in telnet(1), a malicious
667: server or man-in-the-middle attack could allow
668: execution of arbitrary code with the privileges of
669: the user invoking telnet(1).</a>
1.308 brad 670: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 671: More stringent checking should be done in the copy(9)
672: functions to prevent their misuse.</a>
1.306 brad 673: <li><a href="errata35.html#locore">Feb 28, 2005:
674: More stringent checking should be done in the copy(9)
675: functions to prevent their misuse.</a>
1.304 brad 676: <li><a href="errata35.html#httpd3">Jan 12, 2005:
677: httpd(8)'s mod_include module fails to properly validate
678: the length of user supplied tag strings prior to copying
1.305 brad 679: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 680: <li><a href="errata35.html#pfkey">Dec 14, 2004:
681: On systems running isakmpd(8) it is possible for a local
682: user to cause kernel memory corruption and system panic by
1.303 markus 683: setting ipsec(4) credentials on a socket.</a>
1.301 miod 684: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 685: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 686: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 687: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 688: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 689: httpd(8)'s mod_rewrite module can be made to write one zero byte in
690: an arbitrary memory position outside of a char array, causing a DoS
691: or possibly buffer overflows.</a>
1.301 miod 692: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 693: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 694: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 695: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 696: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 697: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 698: Multiple remote vulnerabilities have been found in the cvs(1)
699: server which can be used by CVS clients to crash or execute
1.293 brad 700: arbitrary code on the server.</a>
1.301 miod 701: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 702: kdc(8) performs inadequate checking of request fields, leading
703: to the possibility of principal impersonation from other
704: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 705: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 706: xdm(1) ignores the requestPort resource and creates a
1.293 brad 707: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 708: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 709: A buffer overflow in the cvs(1) server has been found,
710: which can be used by CVS clients to execute arbitrary code on
1.293 brad 711: the server.</a>
1.301 miod 712: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 713: Integer overflow problems were found in procfs, allowing
1.293 brad 714: reading of arbitrary kernel memory.</a>
1.301 miod 715: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 716: Pathname validation problems have been found in cvs(1),
717: allowing clients and servers access to files outside the
1.293 brad 718: repository or local CVS tree.</a>
1.279 deraadt 719: </ul>
720:
721: <p>
722: <li>
1.288 matthieu 723: <a name="34"></a>
1.261 david 724:
1.294 david 725: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 726: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 727: in <a href="anoncvs.html">OpenBSD current</a>. The
728: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
729: you should update your machine.
1.261 david 730: <p>
731: <ul>
1.302 markus 732: <li><a href="errata34.html#pfkey">Dec 14, 2004:
733: On systems running isakmpd(8) it is possible for a local
734: user to cause kernel memory corruption and system panic by
1.303 markus 735: setting ipsec(4) credentials on a socket.</a>
1.298 brad 736: <li><a href="errata34.html#xpm">Sep 16, 2004:
737: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 738: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
739: httpd(8)'s mod_rewrite module can be made to write one zero byte in
740: an arbitrary memory position outside of a char array, causing a DoS
741: or possibly buffer overflows.</a>
1.294 david 742: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 743: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 744: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 745: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 746: an attacker can delete IPsec tunnels at will.</a>
1.294 david 747: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 748: Multiple remote vulnerabilities have been found in the cvs(1)
749: server which can be used by CVS clients to crash or execute
1.293 brad 750: arbitrary code on the server.</a>
1.294 david 751: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 752: kdc(8) performs inadequate checking of request fields, leading
753: to the possibility of principal impersonation from other
754: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 755: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 756: A buffer overflow in the cvs(1) server has been found,
757: which can be used by CVS clients to execute arbitrary code on
758: the server.</a>
1.294 david 759: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 760: Integer overflow problems were found in procfs, allowing
761: reading of arbitrary kernel memory.</a>
1.294 david 762: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 763: Pathname validation problems have been found in cvs(1),
764: allowing clients and servers access to files outside the
765: repository or local CVS tree.</a>
1.294 david 766: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 767: A missing check for a NULL-pointer dereference may allow a
1.281 otto 768: remote attacker to crash applications using OpenSSL.</a>
1.294 david 769: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 770: Defects in the payload validation and processing functions of
771: isakmpd have been discovered. An attacker could send malformed
772: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 773: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 774: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
775: access module, using IP addresses without a netmask on big endian
776: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 777: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 778: An IPv6 MTU handling problem exists that could be used by an
779: attacker to cause a denial of service attack.</a>
1.294 david 780: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 781: A reference counting bug in shmat(2) could be used to write to
782: kernel memory under certain circumstances.</a>
1.294 david 783: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 784: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 785: by Thomas Walpuski.</a>
1.294 david 786: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 787: It may be possible for a local user to overrun the stack in
788: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 789: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 790: The use of certain ASN.1 encodings or malformed public keys may
791: allow an attacker to mount a denial of service attack against
792: applications linked with ssl(3).</a>
1.261 david 793: </ul>
794:
795: <li>
1.288 matthieu 796: <a name="33"></a>
1.246 deraadt 797:
1.294 david 798: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 799: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 800: in <a href="anoncvs.html">OpenBSD current</a>. The
801: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 802: you should update your machine.
1.246 deraadt 803: <p>
804: <ul>
1.294 david 805: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 806: Pathname validation problems have been found in cvs(1),
807: allowing clients and servers access to files outside the
808: repository or local CVS tree.</a>
1.294 david 809: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 810: A missing check for a NULL-pointer dereference may allow a
1.281 otto 811: remote attacker to crash applications using OpenSSL.</a>
1.294 david 812: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 813: Defects in the payload validation and processing functions of
814: isakmpd have been discovered. An attacker could send malformed
815: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 816: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 817: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
818: access module, using IP addresses without a netmask on big endian
819: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 820: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 821: An IPv6 MTU handling problem exists that could be used by an
822: attacker to cause a denial of service attack.</a>
1.294 david 823: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 824: A reference counting bug in shmat(2) could be used to write to
825: kernel memory under certain circumstances.</a>
1.294 david 826: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 827: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 828: by Thomas Walpuski.</a>
1.294 david 829: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 830: It may be possible for a local user to execute arbitrary code
831: resulting in escalation of privileges due to a stack overrun
832: in compat_ibcs2(8).</a>
1.294 david 833: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 834: The use of certain ASN.1 encodings or malformed public keys may
835: allow an attacker to mount a denial of service attack against
836: applications linked with ssl(3).</a>
1.294 david 837: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 838: Access of freed memory in pf(4) could be used to
1.260 margarid 839: remotely panic a machine using scrub rules.</a>
1.294 david 840: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 841: A buffer overflow in the address parsing in
842: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 843: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 844: OpenSSH versions prior to 3.7 contains a buffer management error
845: that is potentially exploitable.</a>
1.294 david 846: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 847: Root may be able to reduce the security level by taking advantage of
848: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 849: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 850: An improper bounds check in the kernel may allow a local user
851: to panic the kernel.</a>
1.294 david 852: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 853: An off-by-one error exists in the C library function realpath(3)
854: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 855: </ul>
856:
1.265 miod 857:
1.247 david 858: <p>
1.246 deraadt 859: <li>
1.288 matthieu 860: <a name="32"></a>
1.224 deraadt 861:
1.294 david 862: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 863: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 864: in <a href="anoncvs.html">OpenBSD current</a>. The
865: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 866: you should update your machine.
1.224 deraadt 867: <p>
868: <ul>
1.294 david 869: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 870: The use of certain ASN.1 encodings or malformed public keys may
871: allow an attacker to mount a denial of service attack against
872: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 873: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 874: Access of freed memory in pf(4) could be used to
1.260 margarid 875: remotely panic a machine using scrub rules.</a>
1.294 david 876: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 877: A buffer overflow in the address parsing in
878: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 879: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 880: OpenSSH versions prior to 3.7 contains a buffer management error
881: that is potentially exploitable.</a>
1.294 david 882: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 883: Fix for a potential security issue in
884: sendmail(8) with respect to DNS maps.</a>
1.294 david 885: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 886: An off-by-one error exists in the C library function realpath(3)
887: may allow an attacker to gain escalated privileges.</a>
1.294 david 888: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 889: A buffer overflow in the address parsing in
890: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 891: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 892: A cryptographic weaknesses in the Kerberos v4 protocol can be
893: exploited on Kerberos v5 as well.</a>
1.294 david 894: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 895: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 896: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 897: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 898: Various SSL and TLS operations in OpenSSL are vulnerable to
899: timing attacks.</a>
1.294 david 900: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 901: A buffer overflow in lprm(1) may allow an attacker to elevate
902: privileges to user daemon.</a>.
1.294 david 903: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 904: A buffer overflow in the envelope comments processing in
905: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 906: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 907: httpd(8) leaks file inode numbers via ETag header as well as
908: child PIDs in multipart MIME boundary generation. This could
909: lead, for example, to NFS exploitation because it uses inode
910: numbers as part of the file handle.</a>
1.294 david 911: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 912: In ssl(8) an information leak can occur via timing by performing
913: a MAC computation even if incorrect block cipher padding has
914: been found, this is a countermeasure. Also, check for negative
915: sizes, in allocation routines.</a>
1.294 david 916: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 917: A double free exists in cvs(1) that could lead to privilege
918: escalation for cvs configurations where the cvs command is
1.233 margarid 919: run as a privileged user.</a>
1.294 david 920: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 921: A buffer overflow exists in named(8) that could lead to a
922: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 923: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 924: A logic error in the pool kernel memory allocator could cause
925: memory corruption in low-memory situations, causing the system
926: to crash.</a>
1.294 david 927: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 928: An attacker can bypass smrsh(8)'s restrictions and execute
929: arbitrary commands with the privileges of his own account.</a>
1.294 david 930: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 931: Network bridges running pf with scrubbing enabled could cause
932: mbuf corruption, causing the system to crash.</a>
1.294 david 933: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 934: A buffer overflow can occur in the kadmind(8) daemon, leading
935: to possible remote crash or exploit.</a>
1.224 deraadt 936: </ul>
937:
1.227 miod 938: <p>
939: <li>
1.288 matthieu 940: <a name="31"></a>
1.203 deraadt 941:
1.294 david 942: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 943: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 944: in <a href="anoncvs.html">OpenBSD current</a>. The
945: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 946: you should update your machine.
1.203 deraadt 947:
948: <p>
949: <ul>
1.294 david 950: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 951: A buffer overflow in the address parsing in
952: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 953: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 954: A cryptographic weaknesses in the Kerberos v4 protocol can be
955: exploited on Kerberos v5 as well.</a>
1.294 david 956: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 957: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 958: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 959: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 960: Various SSL and TLS operations in OpenSSL are vulnerable to
961: timing attacks.</a>
1.294 david 962: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 963: A buffer overflow in lprm(1) may allow an attacker to gain
964: root privileges.</a>
1.294 david 965: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 966: A buffer overflow in the envelope comments processing in
967: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 968: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 969: In ssl(8) an information leak can occur via timing by performing
970: a MAC computation even if incorrect block cipher padding has
971: been found, this is a countermeasure. Also, check for negative
972: sizes, in allocation routines.</a>
1.294 david 973: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 974: A double free exists in cvs(1) that could lead to privilege
975: escalation for cvs configurations where the cvs command is
1.294 david 976: run as a privileged user</a>.
977: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 978: A buffer overflow exists in named(8) that could lead to a
979: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 980: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 981: Incorrect argument checking in the getitimer(2) system call
982: may allow an attacker to crash the system.</a>
1.294 david 983: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 984: An attacker can bypass smrsh(8)'s restrictions and execute
985: arbitrary commands with the privileges of his own account.</a>
1.294 david 986: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 987: A buffer overflow can occur in the kadmind(8) daemon, leading
988: to possible remote crash or exploit.</a>
1.294 david 989: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 990: Incorrect argument checking in the setitimer(2) system call
991: may allow an attacker to write to kernel memory.</a>
1.294 david 992: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 993: An insufficient boundary check in the select system call
1.220 miod 994: allows an attacker to overwrite kernel memory and execute arbitrary code
995: in kernel context.</a>
1.294 david 996: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 997: Several remote buffer overflows can occur in the SSL2 server and SSL3
998: client of the ssl(8) library, as in the ASN.1 parser code in the
999: crypto(3) library, all of them being potentially remotely
1000: exploitable.</a>
1.294 david 1001: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1002: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1003: possible remote crash.</a>
1.294 david 1004: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1005: A race condition exists in the pppd(8) daemon which may cause it to
1006: alter the file permissions of an arbitrary file.</a>
1.294 david 1007: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1008: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1009: crash.</a>
1.294 david 1010: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1011: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1012: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1013: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1014: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1015: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1016: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1017: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1018: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1019: input validation error that can result in an integer overflow and
1020: privilege escalation.</a>
1.294 david 1021: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1022: A buffer overflow can occur during the interpretation of chunked
1023: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1024: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1025: Under certain conditions, on systems using YP with netgroups
1026: in the password database, it is possible that sshd(8) does
1027: ACL checks for the requested user name but uses the password
1028: database entry of a different user for authentication. This
1029: means that denied users might authenticate successfully
1030: while permitted users could be locked out.</a>
1.294 david 1031: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1032: A race condition exists that could defeat the kernel's
1033: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1034: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1035: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1036: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1037: A local user can gain super-user privileges due to a buffer
1038: overflow in sshd(8) if AFS has been configured on the system
1039: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1040: in the sshd_config file.</a>
1.203 deraadt 1041: </ul>
1042:
1.235 miod 1043: <p>
1.203 deraadt 1044: <li>
1.288 matthieu 1045: <a name="30"></a>
1.187 deraadt 1046:
1.294 david 1047: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1048: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1049: in <a href="anoncvs.html">OpenBSD current</a>. The
1050: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1051: you should update your machine.
1.187 deraadt 1052:
1053: <p>
1054: <ul>
1.294 david 1055: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1056: A buffer overflow exists in named(8) that could lead to a
1057: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1058: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1059: Incorrect argument checking in the getitimer(2) system call
1060: may allow an attacker to crash the system.</a>
1.294 david 1061: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1062: An attacker can bypass smrsh(8)'s restrictions and execute
1063: arbitrary commands with the privileges of his own account.</a>
1.294 david 1064: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1065: A buffer overflow can occur in the kadmind(8) daemon, leading
1066: to possible remote crash or exploit.</a>
1.294 david 1067: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1068: Incorrect argument checking in the setitimer(2) system call
1069: may allow an attacker to write to kernel memory.</a>
1.294 david 1070: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1071: An insufficient boundary check in the select and poll system calls
1072: allows an attacker to overwrite kernel memory and execute arbitrary code
1073: in kernel context.</a>
1.294 david 1074: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1075: Several remote buffer overflows can occur in the SSL2 server and SSL3
1076: client of the ssl(8) library, as in the ASN.1 parser code in the
1077: crypto(3) library, all of them being potentially remotely
1078: exploitable.</a>
1.294 david 1079: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1080: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1081: possible remote crash.</a>
1.294 david 1082: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1083: A race condition exists in the pppd(8) daemon which may cause it to
1084: alter the file permissions of an arbitrary file.</a>
1.294 david 1085: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1086: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1087: crash.</a>
1.294 david 1088: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1089: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1090: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1091: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1092: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1093: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1094: input validation error that can result in an integer overflow and
1095: privilege escalation.</a>
1.294 david 1096: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1097: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1098: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1099: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1100: A buffer overflow can occur during the interpretation of chunked
1101: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1102: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1103: A race condition exists that could defeat the kernel's
1104: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1105: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1106: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1107: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1108: A local user can gain super-user privileges due to a buffer
1109: overflow in sshd(8) if AFS has been configured on the system
1110: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1111: in the sshd_config file.</a>
1.294 david 1112: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1113: The mail(1) was interpreting tilde escapes even when invoked
1114: in non-interactive mode. As mail(1) is called as root from cron,
1115: this can lead to a local root compromise.</a>
1.294 david 1116: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1117: Under certain conditions, on systems using YP with netgroups in
1118: the password database, it is possible for the rexecd(8) and rshd(8)
1119: daemons to execute a shell from a password database entry for a
1120: different user. Similarly, atrun(8) may change to the wrong
1121: home directory when running jobs.</a>
1.294 david 1122: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1123: A potential double free() exists in the zlib library;
1124: this is not exploitable on OpenBSD.
1125: The kernel also contains a copy of zlib; it is not
1126: currently known if the kernel zlib is exploitable.</a>
1.294 david 1127: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1128: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1129: may allow a local user to gain super-user privileges.</a>
1.294 david 1130: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1131: A race condition between the ptrace(2) and execve(2) system calls
1132: allows an attacker to modify the memory contents of suid/sgid
1133: processes which could lead to compromise of the super-user account.</a>
1.294 david 1134: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1135: There is a security hole in sudo(8) that can be exploited
1136: when the Postfix sendmail replacement is installed that may
1137: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1138: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1139: An attacker can trick a machine running the lpd daemon into
1140: creating new files in the root directory from a machine with
1141: remote line printer access.</a>
1.294 david 1142: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1143: The vi.recover script can be abused in such a way as
1144: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1145: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1146: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1147: resulting in a crash.</a>
1.294 david 1148: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1149: A security hole that may allow an attacker to partially authenticate
1150: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1151: </ul>
1152:
1153: <p>
1154: <li>
1.288 matthieu 1155: <a name="29"></a>
1.173 deraadt 1156:
1.294 david 1157: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1158: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1159: in <a href="anoncvs.html">OpenBSD current</a>. The
1160: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1161: you should update your machine.
1162:
1.173 deraadt 1163:
1164: <p>
1165: <ul>
1.294 david 1166: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1167: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1168: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1169: A race condition exists that could defeat the kernel's
1170: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1171: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1172: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1173: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1174: A local user can gain super-user privileges due to a buffer
1175: overflow in sshd(8) if AFS has been configured on the system
1176: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1177: in the sshd_config file.</a>
1.294 david 1178: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1179: The mail(1) was interpreting tilde escapes even when invoked
1180: in non-interactive mode. As mail(1) is called as root from cron,
1181: this can lead to a local root compromise.</a>
1.294 david 1182: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1183: A potential double free() exists in the zlib library;
1184: this is not exploitable on OpenBSD.
1185: The kernel also contains a copy of zlib; it is not
1186: currently known if the kernel zlib is exploitable.</a>
1.294 david 1187: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1188: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1189: may allow a local user to gain super-user privileges.</a>
1.294 david 1190: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1191: A race condition between the ptrace(2) and execve(2) system calls
1192: allows an attacker to modify the memory contents of suid/sgid
1193: processes which could lead to compromise of the super-user account.</a>
1.294 david 1194: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1195: There is a security hole in sudo(8) that can be exploited
1196: when the Postfix sendmail replacement is installed that may
1197: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1198: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1199: An attacker can trick a machine running the lpd daemon into
1200: creating new files in the root directory from a machine with
1201: remote line printer access.</a>
1.294 david 1202: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1203: The vi.recover script can be abused in such a way as
1204: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1205: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1206: A security hole exists in uuxqt(8) that may allow an
1207: attacker to gain root privileges.</a>
1.294 david 1208: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1209: A security hole exists in lpd(8) that may allow an
1210: attacker to gain root privileges if lpd is running.</a>
1.294 david 1211: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1212: A security hole exists in sendmail(8) that may allow an
1213: attacker on the local host to gain root privileges.</a>
1.294 david 1214: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1215: A kernel buffer overflow in the NFS code can be used to execute
1216: arbitrary code by users with mount privileges (only root by
1.181 millert 1217: default).</a>
1.294 david 1218: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1219: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1220: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1221: sshd(8) allows users to delete arbitrary files named "cookies"
1222: if X11 forwarding is enabled. X11 forwarding is disabled
1223: by default.</a>
1.294 david 1224: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1225: Programs using the fts routines can be tricked into changing
1226: into the wrong directory.</a>
1.294 david 1227: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1228: Sendmail signal handlers contain unsafe code,
1229: leading to numerous race conditions.</a>
1.173 deraadt 1230: </ul>
1231:
1232: <p>
1233: <li>
1.288 matthieu 1234: <a name="28"></a>
1.152 deraadt 1235:
1.294 david 1236: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1237: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1238: in <a href="anoncvs.html">OpenBSD current</a>. The
1239: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1240: you should update your machine.
1241:
1.152 deraadt 1242:
1243: <p>
1244: <ul>
1.294 david 1245: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1246: A security hole exists in uuxqt(8) that may allow an
1247: attacker to gain root privileges.</a>
1.294 david 1248: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1249: A security hole exists in lpd(8) that may allow an
1250: attacker to gain root privileges if lpd is running.</a>
1.294 david 1251: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1252: A security hole exists in sendmail(8) that may allow an
1253: attacker on the local host to gain root privileges.</a>
1.294 david 1254: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1255: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1256: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1257: Programs using the fts routines can be tricked into changing
1258: into the wrong directory.</a>
1.294 david 1259: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1260: Sendmail signal handlers contain unsafe code,
1261: leading to numerous race conditions.</a>
1.294 david 1262: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1263: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1264: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1265: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1266: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1267: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1268: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1269: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1270: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1271: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1272: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1273: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1274: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1275: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1276: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1277: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1278: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1279: rnd(4) did not use all of its input when written to.</a>
1.294 david 1280: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1281: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1282: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1283: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1284: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1285: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1286: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1287: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1288: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1289: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1290: </ul>
1291:
1292: <p>
1293: <li>
1.288 matthieu 1294: <a name="27"></a>
1.124 deraadt 1295:
1.294 david 1296: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1297: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1298: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1299: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1300:
1301: <p>
1302: <ul>
1.294 david 1303: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1304: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1305: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1306: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1307: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1308: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1309: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1310: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1311: (patch included)</a>
1.294 david 1312: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1313: X11 libraries have 2 potential overflows in xtrans code.
1314: (patch included)</a>
1.294 david 1315: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1316: Apache mod_rewrite and mod_vhost_alias modules could expose files
1317: on the server in certain configurations if used.
1318: (patch included)</a>
1.294 david 1319: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1320: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1321: TERMPATH and TERMCAP environment variables as it should.
1322: (patch included)</a>
1.294 david 1323: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1324: There are printf-style format string bugs in several privileged
1325: programs. (patch included)</a>
1.294 david 1326: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1327: libcurses honored terminal descriptions in the $HOME/.terminfo
1328: directory as well as in the TERMCAP environment variable for
1329: setuid and setgid applications.
1.146 deraadt 1330: (patch included)</a>
1.294 david 1331: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1332: A format string vulnerability exists in talkd(8).
1333: (patch included)</a>
1.294 david 1334: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1335: A format string vulnerability exists in the pw_error() function of the
1336: libutil library, yielding localhost root through chpass(1).
1337: (patch included)</a>
1.294 david 1338: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1339: Bad ESP/AH packets could cause a crash under certain conditions.
1340: (patch included)</a>
1.294 david 1341: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1342: A format string vulnerability (localhost root) exists in xlock(1).
1343: (patch included)</a>
1.294 david 1344: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1345: Various bugs found in X11 libraries have various side effects, almost
1346: completely denial of service in OpenBSD.
1347: (patch included)</a>
1.294 david 1348: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1349: Just like pretty much all the other unix ftp daemons
1350: on the planet, ftpd had a remote root hole in it.
1351: Luckily, ftpd was not enabled by default.
1.137 deraadt 1352: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1353: (patch included)</a>
1.294 david 1354: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1355: Mopd, very rarely used, contained some buffer overflows.
1356: (patch included)</a>
1.294 david 1357: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1358: libedit would check for a <b>.editrc</b> file in the current
1359: directory. Not known to be a real security issue, but a patch
1360: is available anyways.
1361: (patch included)</a>
1.294 david 1362: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1363: A serious bug in dhclient(8) could allow strings from a
1364: malicious dhcp server to be executed in the shell as root.
1365: (patch included)</a>
1.294 david 1366: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1367: A serious bug in isakmpd(8) policy handling wherein
1368: policy verification could be completely bypassed in isakmpd.
1369: (patch included)</a>
1.294 david 1370: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1371: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1372: should not be used, and results in security problems on
1373: other operating systems.</a>
1.294 david 1374: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1375: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1376: (patch included)</a>
1.294 david 1377: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1378: Improper use of ipf <i>keep-state</i> rules can result
1379: in firewall rules being bypassed. (patch included)</a>
1380:
1.124 deraadt 1381: </ul>
1382:
1383: <p>
1384: <li>
1.288 matthieu 1385: <a name="26"></a>
1.119 deraadt 1386:
1.294 david 1387: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1388: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1389: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1390: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1391:
1392: <p>
1393: <ul>
1.294 david 1394: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1395: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1396: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1397: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1398: Improper use of ipf <i>keep-state</i> rules can result
1399: in firewall rules being bypassed. (patch included)</a>
1.294 david 1400: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1401: xlockmore has a bug which a localhost attacker can use to gain
1402: access to the encrypted root password hash (which is normally
1.245 miod 1403: encoded using blowfish</a> (see
1.294 david 1404: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1405: crypt(3)</a>)
1.245 miod 1406: (patch included).
1.294 david 1407: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1408: Systems running with procfs enabled and mounted are
1409: vulnerable to a very tricky exploit. procfs is not
1410: mounted by default.
1411: (patch included).</a>
1.294 david 1412: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1413: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1414: thus exposing the system to a race where the aliases file
1415: did not exist.
1.119 deraadt 1416: (patch included).</a>
1.294 david 1417: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1418: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1419: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1420: A buffer overflow in the RSAREF code included in the
1421: USA version of libssl, is possibly exploitable in
1422: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1423: (patch included).<br></a>
1424: <strong>Update:</strong> Turns out that this was not exploitable
1425: in any of the software included in OpenBSD 2.6.
1.294 david 1426: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1427: Any user could change interface media configurations, resulting in
1428: a localhost denial of service attack.
1.121 deraadt 1429: (patch included).</a>
1.119 deraadt 1430: </ul>
1431:
1432: <p>
1433: <li>
1.288 matthieu 1434: <a name="25"></a>
1.106 deraadt 1435:
1.294 david 1436: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1437: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1438: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1439: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1440:
1.96 deraadt 1441: <p>
1.104 deraadt 1442: <ul>
1.294 david 1443: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1444: In cron(8), make sure argv[] is NULL terminated in the
1445: fake popen() and run sendmail as the user, not as root.
1446: (patch included).</a>
1.294 david 1447: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1448: filesystems had an overrun in their handling of uio_offset
1449: in their readdir() routines. (These filesystems are not
1450: enabled by default). (patch included).</a>
1.294 david 1451: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1452: when we execve() a new process. (patch included).</a>
1.294 david 1453: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1454: been handled by IPsec may be transmitted as cleartext.
1455: PF_KEY SA expirations may leak kernel resources.
1456: (patch included).</a>
1.294 david 1457: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1458: motd re-writing and change the find(1) to use -execdir
1459: (patch included).</a>
1.294 david 1460: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1461: users to chflags(2) or fchflags(2) on character or block devices
1462: which they may currently be the owner of (patch included).</a>
1.294 david 1463: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1464: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1465: </ul>
1466:
1.106 deraadt 1467: <p>
1468: <li>
1.288 matthieu 1469: <a name="24"></a>
1.235 miod 1470:
1.294 david 1471: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1472: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1473: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1474: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1475:
1.96 deraadt 1476: <p>
1.75 deraadt 1477: <ul>
1.294 david 1478: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1479: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1480: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1481: another kernel crash case caused by the <strong>crashme</strong>
1482: program (patch included).</a>
1.294 david 1483: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1484: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1485: (patch included).</a>
1.294 david 1486: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1487: existed in ping(8). (patch included).</a>
1.294 david 1488: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1489: the ipq, which could permit an attacker to cause a crash.
1490: (patch included).</a>
1.294 david 1491: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1492: kernel between accept(2) and select(2) could permit an attacker
1493: to hang sockets from remote.
1494: (patch included).</a>
1.294 david 1495: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1496: bog the machine excessively and cause problems.
1497: (patch included).</a>
1.294 david 1498: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1499: DDB interacted to possibly cause a crash.
1500: (patch included).</a>
1.294 david 1501: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1502: (patch included).</a>
1.294 david 1503: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1504: problem in bootpd(8). (patch included).</a>
1.294 david 1505: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1506: exploitable problem relating to environment variables in termcap
1507: and curses. (patch included).</a>
1.294 david 1508: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1509: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1510: </ul>
1511:
1.106 deraadt 1512: <p>
1513: <li>
1.288 matthieu 1514: <a name="23"></a>
1.235 miod 1515:
1.294 david 1516: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1517: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1518: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1519: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1520:
1.96 deraadt 1521: <p>
1.53 matthieu 1522: <ul>
1.294 david 1523: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1524: problem in bootpd(8). (patch included).</a>
1.294 david 1525: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1526: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1527: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1528: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1529: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1530: chpass(1) has a file descriptor leak which allows an
1531: attacker to modify /etc/master.passwd.</a>
1.294 david 1532: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1533: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1534: should not be executed with fd slots 0, 1, or 2 free.
1535: (patch included).</a>
1.294 david 1536: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1537: libraries (patches included).</a>
1.294 david 1538: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1539: processes too permissive (4th revision patch included).</a>
1.294 david 1540: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1541: of immutable and append-only file flags. (patch included).</a>
1.294 david 1542: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1543: if IPSEC is enabled (patch included).</a>
1.294 david 1544: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1545: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1546: </ul>
1.9 deraadt 1547:
1.106 deraadt 1548: <p>
1549: <li>
1.288 matthieu 1550: <a name="22"></a>
1.235 miod 1551:
1.294 david 1552: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1553: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1554: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1555: still exist in other operating systems. (The supplied patches are for
1556: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1557:
1.96 deraadt 1558: <p>
1.9 deraadt 1559: <ul>
1.294 david 1560: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1561: packets if IPSEC is enabled (patch included).</a>
1.294 david 1562: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1563: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1564: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1565: (patch included).</a>
1.294 david 1566: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1567: (patch included).</a>
1.294 david 1568: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1569: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1570: (patch included).</a>
1.294 david 1571: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1572: export (patch included).</a>
1.112 philen 1573: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1574: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1575: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1576: Acceptance.</a>
1.294 david 1577: A patch is available <a href="errata22.html#sourceroute">here</a>.
1578: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1579: flaw (patch included).</a>
1.294 david 1580: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1581: </ul>
1582:
1.106 deraadt 1583: <p>
1584: <li>
1.288 matthieu 1585: <a name="21"></a>
1.235 miod 1586:
1.294 david 1587: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1588: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1589: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1590: exist in other operating systems. (If you are running OpenBSD 2.1, we
1591: would strongly recommend an upgrade to the newest release, as this
1592: patch list only attempts at fixing the most important security
1593: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1594: security problems. Many of those problems were solved in ways which
1595: make it hard for us to provide patches).
1596:
1.96 deraadt 1597: <p>
1.52 deraadt 1598: <ul>
1.112 philen 1599: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1600: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1601: (patch included)</a>
1.112 philen 1602: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1603: </ul>
1.51 deraadt 1604:
1.106 deraadt 1605: <p>
1606: <li>
1.288 matthieu 1607: <a name="20"></a>
1.235 miod 1608:
1.294 david 1609: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1610: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1611: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1612: exist in other operating systems. (If you are running OpenBSD 2.0, we
1613: commend you for being there back in the old days!, but you're really
1614: missing out if you don't install a new version!)
1615:
1616: <p>
1617: <ul>
1.112 philen 1618: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1619: resolver (patch included)</a>
1620: <li>Many others... if people can hunt them down, please let me know
1621: and we'll put them up here.
1622: </ul>
1.51 deraadt 1623: <p>
1.106 deraadt 1624:
1.288 matthieu 1625: <a name="watching"></a>
1.294 david 1626: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1627:
1.21 deraadt 1628: Since we take a proactive stance with security, we are continually
1629: finding and fixing new security problems. Not all of these problems
1.80 espie 1630: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1631: confirmed to be exploitable; many simple bugs we fix do turn out to
1632: have security consequences we could not predict. We do not have the
1633: time resources to make these changes available in the above format.<p>
1.21 deraadt 1634:
1635: Thus there are usually minor security fixes in the current source code
1636: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1637: guarantee that these problems are of minimal impact and unproven
1.44 ian 1638: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1639: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1640:
1.45 deraadt 1641: People who are really concerned with security can do a number of
1642: things:<p>
1.21 deraadt 1643:
1644: <ul>
1645: <li>If you understand security issues, watch our
1.294 david 1646: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1647: eye out for things which appear security related. Since
1.21 deraadt 1648: exploitability is not proven for many of the fixes we make,
1649: do not expect the relevant commit message to say "SECURITY FIX!".
1650: If a problem is proven and serious, a patch will be available
1651: here very shortly after.
1.161 horacio 1652: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1653: security-announce mailing list</a> which will notify you for every
1.186 ian 1654: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1655: and instruct you on how to patch the problem.
1.21 deraadt 1656: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1657: complete system build from time to time (read /usr/src/Makefile
1658: carefully). Users can make the assumption that the current
1659: source tree always has stronger security than the previous release.
1.45 deraadt 1660: However, building your own system from source code is not trivial;
1.265 miod 1661: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1662: transition between major releases.
1.115 ericj 1663: <li>Install a binary snapshot for your
1.80 espie 1664: architecture, which are made available fairly often. For
1.29 deraadt 1665: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1666: </ul>
1667:
1.9 deraadt 1668: <p>
1.288 matthieu 1669: <a name="reporting"></a>
1.294 david 1670: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1671:
1.5 deraadt 1672: <p> If you find a new security problem, you can mail it to
1.294 david 1673: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1674: <br>
1.5 deraadt 1675: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1676: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1677:
1.107 deraadt 1678: <p>
1.288 matthieu 1679: <a name="papers"></a>
1.294 david 1680: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1681:
1682: A number of papers have been written by OpenBSD team members, about security
1683: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1684: documents are available as follows.<p>
1.107 deraadt 1685:
1686: <ul>
1.113 deraadt 1687: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1688: <a href="events.html#usenix99">Usenix 1999</a>,
1689: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1690: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1691: <a href="papers/bcrypt-paper.ps">paper</a> and
1692: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1693: <p>
1694: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1695: <a href="events.html#usenix99">Usenix 1999</a>,
1696: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1697: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1698: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1699: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1700: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1701: <a href="papers/crypt-paper.ps">paper</a> and
1702: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1703: <p>
1704: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1705: <a href="events.html#usenix99">Usenix 1999</a>,
1706: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1707: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1708: <a href="papers/strlcpy-paper.ps">paper</a> and
1709: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1710: <p>
1.118 deraadt 1711: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1712: <a href="events.html#lisa99">LISA 1999</a>,
1713: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1714: <a href="papers/authgw-paper.ps">paper</a> and
1715: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1716: <p>
1.153 jufi 1717: <li>Encrypting Virtual Memory<br>
1.294 david 1718: <a href="events.html#sec2000">Usenix Security 2000</a>,
1719: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1720: <a href="papers/swapencrypt.ps">paper</a> and
1721: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1722: <p>
1.107 deraadt 1723: </ul>
1.294 david 1724: </ul>
1.106 deraadt 1725:
1.2 deraadt 1726: <hr>
1.294 david 1727: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1728: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1729: <br>
1.383 ! sthen 1730: <small>$OpenBSD: security.html,v 1.382 2009/11/08 15:26:53 tobias Exp $</small>
1.1 deraadt 1731:
1.24 deraadt 1732: </body>
1733: </html>
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