Annotation of www/security.html, Revision 1.373
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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>,
68: <a href="#44">4.4</a>.
1.114 philen 69: </td>
70: </tr>
71: </table>
1.56 deraadt 72: <hr>
73:
1.294 david 74: <a name="goals"></a>
1.278 deraadt 75: <ul>
1.294 david 76: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 77:
1.14 deraadt 78: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 79: ONE in the industry for security (if we are not already there). Our
80: open software development model permits us to take a more
81: uncompromising view towards increased security than Sun, SGI, IBM, HP,
82: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 83: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 84: cryptography</a>, we are able to take cryptographic approaches towards
85: fixing security problems.<p>
1.18 deraadt 86:
1.288 matthieu 87: <a name="disclosure"></a>
1.294 david 88: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 89:
1.45 deraadt 90: Like many readers of the
1.196 jufi 91: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 92: BUGTRAQ mailing list</a>,
1.106 deraadt 93: we believe in full disclosure of security problems. In the
94: operating system arena, we were probably the first to embrace
95: the concept. Many vendors, even of free software, still try
96: to hide issues from their users.<p>
97:
98: Security information moves very fast in cracker circles. On the other
99: hand, our experience is that coding and releasing of proper security
100: fixes typically requires about an hour of work -- very fast fix
101: turnaround is possible. Thus we think that full disclosure helps the
102: people who really care about security.<p>
103:
1.288 matthieu 104: <a name="process"></a>
1.294 david 105: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 106:
1.12 deraadt 107: Our security auditing team typically has between six and twelve
1.45 deraadt 108: members who continue to search for and fix new security holes. We
109: have been auditing since the summer of 1996. The process we follow to
110: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 111: every critical software component. We are not so much looking for
112: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 113: years later someone discovers the problem used to be a security
1.106 deraadt 114: issue, and we fixed it because it was just a bug, well, all the
115: better. Flaws have been found in just about every area of the system.
116: Entire new classes of security problems have been found during our
117: audit, and often source code which had been audited earlier needs
118: re-auditing with these new flaws in mind. Code often gets audited
119: multiple times, and by multiple people with different auditing
120: skills.<p>
1.12 deraadt 121:
1.94 deraadt 122: Some members of our security auditing team worked for Secure Networks,
123: the company that made the industry's premier network security scanning
124: software package Ballista (Secure Networks got purchased by Network
125: Associates, Ballista got renamed to Cybercop Scanner, and well...)
126: That company did a lot of security research, and thus fit in well
1.106 deraadt 127: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
128: colours since day 1.<p>
1.31 deraadt 129:
1.34 deraadt 130: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 131: In most cases we have found that the determination of exploitability
132: is not an issue. During our ongoing auditing process we find many
133: bugs, and endeavor to fix them even though exploitability is not
134: proven. We fix the bug, and we move on to find other bugs to fix. We
135: have fixed many simple and obvious careless programming errors in code
136: and only months later discovered that the problems were in fact
137: exploitable. (Or, more likely someone on
1.197 jufi 138: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 139: would report that other operating systems were vulnerable to a `newly
140: discovered problem', and then it would be discovered that OpenBSD had
141: been fixed in a previous release). In other cases we have been saved
142: from full exploitability of complex step-by-step attacks because we
143: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 144: managed such a success is the lpd advisory that Secure Networks put out.
145: <p>
1.29 deraadt 146:
1.288 matthieu 147: <a name="newtech"></a>
1.294 david 148: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 149:
150: As we audit source code, we often invent new ways of solving problems.
151: Sometimes these ideas have been used before in some random application
152: written somewhere, but perhaps not taken to the degree that we do.
153: <p>
154:
155: <ul>
156: <li>strlcpy() and strlcat()
157: <li>Memory protection purify
158: <ul>
159: <li>W^X
160: <li>.rodata segment
161: <li>Guard pages
162: <li>Randomized malloc()
163: <li>Randomized mmap()
164: <li>atexit() and stdio protection
165: </ul>
1.295 otto 166: <li>Privilege separation
1.278 deraadt 167: <li>Privilege revocation
168: <li>Chroot jailing
169: <li>New uids
170: <li>ProPolice
171: <li>... and others
172: </ul>
173: <p>
174:
1.294 david 175: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 176:
1.45 deraadt 177: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 178: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 179: commonplace in security forums like
1.197 jufi 180: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 181:
1.45 deraadt 182: The most intense part of our security auditing happened immediately
1.80 espie 183: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 184: over the last third of 1996 and first half of 1997. Thousands (yes,
185: thousands) of security issues were fixed rapidly over this year-long
186: period; bugs like the standard buffer overflows, protocol
187: implementation weaknesses, information gathering, and filesystem
188: races. Hence most of the security problems that we encountered were
189: fixed before our 2.1 release, and then a far smaller number needed
190: fixing for our 2.2 release. We do not find as many problems anymore,
191: it is simply a case of diminishing returns. Recently the security
192: problems we find and fix tend to be significantly more obscure or
193: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 194:
1.35 deraadt 195: <ul>
1.45 deraadt 196: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 197: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 198: to search for more complicated exploits, so we will too.
199: <li>Finding and fixing subtle flaws in complicated software is
200: a lot of fun.
1.35 deraadt 201: </ul>
1.106 deraadt 202: <p>
1.15 deraadt 203:
1.14 deraadt 204: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 205: to find and fix new security flaws.<p>
1.12 deraadt 206:
1.288 matthieu 207: <a name="default"></a>
1.294 david 208: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 209:
210: To ensure that novice users of OpenBSD do not need to become security
211: experts overnight (a viewpoint which other vendors seem to have), we
212: ship the operating system in a Secure by Default mode. All non-essential
213: services are disabled. As the user/administrator becomes more familiar
214: with the system, he will discover that he has to enable daemons and other
215: parts of the system. During the process of learning how to enable a new
216: service, the novice is more likely to learn of security considerations.<p>
217:
218: This is in stark contrast to the increasing number of systems that
219: ship with NFS, mountd, web servers, and various other services enabled
220: by default, creating instantaneous security problems for their users
221: within minutes after their first install.<p>
222:
1.288 matthieu 223: <a name="crypto"></a>
1.294 david 224: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 225:
226: And of course, since the OpenBSD project is based in Canada, it is possible
227: for us to integrate cryptography. For more information, read the page
1.116 deraadt 228: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 229:
1.294 david 230: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 231:
232: <li>
1.373 ! djm 233: <a name="45"></a>
! 234:
! 235: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
! 236: These are the OpenBSD 4.5 advisories -- all these problems are solved
! 237: in <a href=anoncvs.html>OpenBSD current</a> and the
! 238: <a href=stable.html>patch branch</a>.
! 239:
! 240: <p>
! 241: <ul>
! 242: <li><a href="errata45.html#001_openssl">April 8, 2009:
! 243: OpenSSL's ASN.1 handling code could be forced to make invalid
! 244: memory accesses by certain invalid strings or structures, allowing
! 245: denial-of-service attacks.</a>
! 246: </ul>
! 247:
! 248: <li>
1.365 deraadt 249: <a name="44"></a>
250:
251: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
252: These are the OpenBSD 4.4 advisories -- all these problems are solved
253: in <a href=anoncvs.html>OpenBSD current</a> and the
254: <a href=stable.html>patch branch</a>.
255:
256: <p>
257: <ul>
1.373 ! djm 258: <li><a href="errata44.html#012_openssl">April 8, 2009:
! 259: OpenSSL's ASN.1 handling code could be forced to make invalid
! 260: memory accesses by certain invalid strings or structures, allowing
! 261: denial-of-service attacks.</a>
1.372 millert 262: <li><a href="errata44.html#011_sudo">February 22, 2009:
263: sudo(8) may allow a user listed in sudoers to run a command
264: as a different user than their access rule specifies when a Unix
265: group is used in the RunAs portion of the rule.</a>
1.370 djm 266: <li><a href="errata44.html#008_bind">January 15, 2009:
267: named(8) suffered from a similar logic error that may allow
268: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 269: <li><a href="errata44.html#007_openssl">January 9, 2009:
270: OpenSSL suffered from some logic errors that allowed bypass
271: of DSA/ECDSA certificate validation.</a>
1.367 brad 272: <li><a href="errata44.html#001_ndp">November 2, 2008:
273: The Neighbor Discovery Protocol (ndp) did not correctly verify
274: neighbor solicitation requests maybe allowing a nearby attacker
275: to intercept traffic.</a>
1.365 deraadt 276: </ul>
277:
278: <li>
1.357 brad 279: <a name="43"></a>
280:
281: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
282: These are the OpenBSD 4.3 advisories -- all these problems are solved
283: in <a href=anoncvs.html>OpenBSD current</a> and the
284: <a href=stable.html>patch branch</a>.
285:
286: <p>
287: <ul>
1.373 ! djm 288: <li><a href="errata43.html#012_openssl">April 8, 2009:
! 289: OpenSSL's ASN.1 handling code could be forced to make invalid
! 290: memory accesses by certain invalid strings or structures, allowing
! 291: denial-of-service attacks.</a>
1.372 millert 292: <li><a href="errata43.html#011_sudo">February 22, 2009:
293: sudo(8) may allow a user listed in sudoers to run a command
294: as a different user than their access rule specifies when a Unix
295: group is used in the RunAs portion of the rule.</a>
1.370 djm 296: <li><a href="errata43.html#008_bind">January 15, 2009:
297: named(8) suffered from a similar logic error that may allow
298: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 299: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 300: OpenSSL suffered from some logic errors that allowed bypass
301: of DSA/ECDSA certificate validation.</a>
1.363 brad 302: <li><a href="errata43.html#005_ndp">October 2, 2008:
303: The Neighbor Discovery Protocol (ndp) did not correctly verify
304: neighbor solicitation requests maybe allowing a nearby attacker
305: to intercept traffic.</a>
1.362 brad 306: <li><a href="errata43.html#004_bind">July 23, 2008:
307: A vulnerability has been found with BIND.</a>
1.361 brad 308: <li><a href="errata43.html#003_xorg">July 15, 2008:
309: Multiple vulnerabilities in X.Org.</a>
1.359 brad 310: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 311: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 312: <li><a href="errata43.html#001_openssh">March 30, 2008:
313: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 314: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 315: </ul>
316:
1.366 miod 317: <p>
318: OpenBSD 4.2 and earlier releases are not supported anymore. The following
319: paragraphs only list advisories issued while they were maintained; these
320: releases are likely to be affected by the advisories for more recent releases.
321: <br>
1.357 brad 322:
323: <li>
1.348 merdely 324: <a name="42"></a>
325:
326: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
327: These are the OpenBSD 4.2 advisories -- all these problems are solved
328: in <a href=anoncvs.html>OpenBSD current</a> and the
329: <a href=stable.html>patch branch</a>.
330:
331: <p>
332: <ul>
1.364 tobias 333: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 334: The Neighbor Discovery Protocol (ndp) did not correctly verify
335: neighbor solicitation requests maybe allowing a nearby attacker
336: to intercept traffic.</a>
1.362 brad 337: <li><a href="errata42.html#013_bind">July 23, 2008:
338: A vulnerability has been found with BIND.</a>
1.361 brad 339: <li><a href="errata42.html#012_xorg2">July 15, 2008:
340: Multiple vulnerabilities in X.Org.</a>
1.359 brad 341: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 342: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 343: <li><a href="errata42.html#010_openssh">March 30, 2008:
344: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 345: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 346: <li><a href="errata42.html#009_ppp">March 7, 2008:
347: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 348: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
349: Multiple vulnerabilities in X.Org.</a>
1.352 henning 350: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
351: A missing NULL pointer check can lead to a kernel panic.</a>
352: <li><a href="errata42.html#004_pf">Nov 27, 2007:
353: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 354: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
355: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 356: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 357: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 358: </ul>
359:
360: <li>
1.346 matthieu 361: <a name="41"></a>
362:
363: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
364: These are the OpenBSD 4.1 advisories -- all these problems are solved
365: in <a href=anoncvs.html>OpenBSD current</a> and the
366: <a href=stable.html>patch branch</a>.
367:
368: <p>
369: <ul>
1.359 brad 370: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 371: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 372: <li><a href="errata41.html#015_openssh">March 30, 2008:
373: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 374: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 375: <li><a href="errata41.html#014_ppp">March 7, 2008:
376: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 377: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
378: Multiple vulnerabilities in X.Org.</a>
379: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
380: The SSL_get_shared_ciphers() function in OpenSSL contains
381: an off-by-one overflow.</a>
1.350 deraadt 382: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 383: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 384: <li><a href="errata41.html#009_file">Jul 9, 2007:
385: Fix possible heap overflow in file(1).</a>
1.346 matthieu 386: <li><a href="errata41.html#005_route6">Apr 27, 2007:
387: IPv6 type 0 route headers can be used to mount a DoS attack
388: against hosts and networks.</a>
389: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
390: Multiple vulnerabilities in X.Org.</a>
391: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
392: Incorrect mbuf handling for ICMP6 packets.</a>
393: </ul>
394:
395: <li>
1.334 brad 396: <a name="40"></a>
397: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
398: These are the OpenBSD 4.0 advisories -- all these problems are solved
399: in <a href=anoncvs.html>OpenBSD current</a> and the
400: <a href=stable.html>patch branch</a>.
401:
402: <p>
403: <ul>
1.350 deraadt 404: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 405: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 406: <li><a href="errata40.html#015_file">Jul 9, 2007:
407: Fix possible heap overflow in file(1).</a>
1.343 deraadt 408: <li><a href="errata40.html#012_route6">Apr 23, 2007:
409: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 410: against hosts and networks.</a>
1.342 mbalmer 411: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
412: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 413: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
414: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 415: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 416: Insufficient validation in vga(4) may allow an attacker to gain
417: root privileges on some i386 systems.</a>
1.339 deraadt 418: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 419: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 420: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 421: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
422: found by Chris Evans.</a>
1.339 deraadt 423: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 424: Several problems have been found in OpenSSL.</a>
1.339 deraadt 425: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 426: httpd(8) does not sanitize the Expect header from an HTTP request
427: when it is reflected back in an error message, which might allow
428: cross-site scripting (XSS) style attacks.</a>
429: </ul>
430:
431: <li>
1.321 brad 432: <a name="39"></a>
433:
434: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
435: These are the OpenBSD 3.9 advisories -- all these problems are solved
436: in <a href=anoncvs.html>OpenBSD current</a> and the
437: <a href=stable.html>patch branch</a>.
438:
439: <p>
440: <ul>
1.343 deraadt 441: <li><a href="errata39.html#022_route6">Apr 23, 2007:
442: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 443: against hosts and networks.</a>
1.342 mbalmer 444: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
445: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 446: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
447: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 448: <li><a href="errata39.html#agp">Jan 3, 2007:
449: Insufficient validation in vga(4) may allow an attacker to gain
450: root privileges on some i386 systems.</a>
1.336 brad 451: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 452: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 453: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 454: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 455: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 456: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 457: found by Chris Evans.</a>
1.333 deraadt 458: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 459: Several problems have been found in OpenSSL.</a>
1.333 deraadt 460: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 461: httpd(8) does not sanitize the Expect header from an HTTP request
462: when it is reflected back in an error message, which might allow
463: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 464: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 465: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
466: possible for an attacker to construct an invalid signature which
467: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 468: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 469: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 470: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 471: Due to the failure to correctly validate LCP configuration option
472: lengths, it is possible for an attacker to send LCP packets via an
473: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 474: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 475: A problem in isakmpd(8) caused IPsec to run partly without replay
476: protection.</a>
1.333 deraadt 477: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 478: It is possible to cause the kernel to panic when more than the default
479: number of sempahores have been allocated.</a>
1.333 deraadt 480: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 481: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
482: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
483: option.</a>
1.333 deraadt 484: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 485: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 486: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 487: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
488: overflow.</a>
1.333 deraadt 489: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 490: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 491: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 492: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 493: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 494: A race condition has been reported to exist in the handling by sendmail
495: of asynchronous signals.</a>
496: </ul>
497:
498: <li>
1.318 deraadt 499: <a name="38"></a>
500:
501: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
502: These are the OpenBSD 3.8 advisories -- all these problems are solved
503: in <a href=anoncvs.html>OpenBSD current</a> and the
504: <a href=stable.html>patch branch</a>.
505:
506: <p>
507: <ul>
1.332 brad 508: <li><a href="errata38.html#ssh2">Oct 12, 2006:
509: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 510: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 511: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 512: found by Chris Evans.</a>
513: <li><a href="errata38.html#openssl2">Oct 7, 2006:
514: Several problems have been found in OpenSSL.</a>
515: <li><a href="errata38.html#httpd2">Oct 7, 2006:
516: httpd(8) does not sanitize the Expect header from an HTTP request
517: when it is reflected back in an error message, which might allow
518: cross-site scripting (XSS) style attacks.</a>
1.329 brad 519: <li><a href="errata38.html#openssl">Sep 8, 2006:
520: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
521: possible for an attacker to construct an invalid signature which
522: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 523: <li><a href="errata38.html#bind">Sep 8, 2006:
524: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 525: <li><a href="errata38.html#sppp">Sep 2, 2006:
526: Due to the failure to correctly validate LCP configuration option
527: lengths, it is possible for an attacker to send LCP packets via an
528: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 529: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
530: A problem in isakmpd(8) caused IPsec to run partly without replay
531: protection.</a>
532: <li><a href="errata38.html#sem">Aug 25, 2006:
533: It is possible to cause the kernel to panic when more than the default
534: number of sempahores have been allocated.</a>
535: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
536: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
537: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
538: option.</a>
539: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
540: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 541: <li><a href="errata38.html#httpd">Jul 30, 2006:
542: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
543: overflow.</a>
1.324 brad 544: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
545: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 546: <li><a href="errata38.html#xorg">May 2, 2006:
547: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 548: <li><a href="errata38.html#sendmail">Mar 25, 2006:
549: A race condition has been reported to exist in the handling by sendmail
550: of asynchronous signals.</a>
551: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 552: Josh Bressers has reported a weakness in OpenSSH caused due to the
553: insecure use of the system(3) function in scp(1) when performing copy
554: operations using filenames that are supplied by the user from the
555: command line.</a>
1.321 brad 556: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 557: Do not allow users to trick suid programs into re-opening files via
558: /dev/fd.</a>
1.321 brad 559: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 560: A buffer overflow has been found in the Perl interpreter with the
561: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 562: </ul>
563:
564: <li>
1.312 david 565: <a name="37"></a>
566:
567: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
568: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 569: in <a href="anoncvs.html">OpenBSD current</a>. The
570: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
571: you should update your machine.
1.312 david 572:
573: <p>
574: <ul>
1.322 brad 575: <li><a href="errata37.html#xorg">May 2, 2006:
576: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 577: <li><a href="errata37.html#sendmail">Mar 25, 2006:
578: A race condition has been reported to exist in the handling by sendmail
579: of asynchronous signals.</a>
1.320 brad 580: <li><a href="errata37.html#ssh">Feb 12, 2006:
581: Josh Bressers has reported a weakness in OpenSSH caused due to the
582: insecure use of the system(3) function in scp(1) when performing copy
583: operations using filenames that are supplied by the user from the
584: command line.</a>
1.319 brad 585: <li><a href="errata37.html#fd">Jan 5, 2006:
586: Do not allow users to trick suid programs into re-opening files via
587: /dev/fd.</a>
588: <li><a href="errata37.html#perl">Jan 5, 2006:
589: A buffer overflow has been found in the Perl interpreter with the
590: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 591: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 592: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 593: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 594: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 595: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 596: Fix a race condition in sudo(8) that could allow a user
1.315 millert 597: to run arbitrary commands.</a>
1.318 deraadt 598: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 599: Fix a buffer overflow, memory leaks, and NULL pointer
600: dereference in cvs(1).</a>
1.312 david 601: </ul>
602:
603: <li>
1.301 miod 604: <a name="36"></a>
605:
606: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
607: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 608: in <a href="anoncvs.html">OpenBSD current</a>. The
609: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
610: you should update your machine.
1.301 miod 611:
612: <p>
1.302 markus 613: <ul>
1.317 millert 614: <li><a href="errata36.html#libz2">Jul 21, 2005:
615: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 616: <li><a href="errata36.html#libz">Jul 6, 2005:
617: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 618: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 619: Fix a race condition in sudo(8) that could allow a user
1.315 millert 620: to run arbitrary commands.</a>
1.311 deraadt 621: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 622: Fix a buffer overflow, memory leaks, and NULL pointer
623: dereference in cvs(1).</a>
1.311 deraadt 624: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 625: Due to buffer overflows in telnet(1), a malicious
626: server or man-in-the-middle attack could allow
627: execution of arbitrary code with the privileges of
628: the user invoking telnet(1).</a>
1.311 deraadt 629: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 630: More stringent checking should be done in the copy(9)
631: functions to prevent their misuse.</a>
1.311 deraadt 632: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 633: More stringent checking should be done in the copy(9)
634: functions to prevent their misuse.</a>
1.311 deraadt 635: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 636: httpd(8)'s mod_include module fails to properly validate
637: the length of user supplied tag strings prior to copying
1.305 brad 638: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 639: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 640: On systems running isakmpd(8) it is possible for a local
641: user to cause kernel memory corruption and system panic by
1.303 markus 642: setting ipsec(4) credentials on a socket.</a>
1.302 markus 643: </ul>
1.301 miod 644:
645: <li>
1.288 matthieu 646: <a name="35"></a>
1.279 deraadt 647:
1.294 david 648: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 649: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 650: in <a href="anoncvs.html">OpenBSD current</a>. The
651: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
652: you should update your machine.
1.279 deraadt 653:
654: <p>
655: <ul>
1.310 brad 656: <li><a href="errata35.html#cvs4">Apr 28, 2005:
657: Fix a buffer overflow, memory leaks, and NULL pointer
658: dereference in cvs(1).</a>
1.309 brad 659: <li><a href="errata35.html#telnet">Mar 30, 2005:
660: Due to buffer overflows in telnet(1), a malicious
661: server or man-in-the-middle attack could allow
662: execution of arbitrary code with the privileges of
663: the user invoking telnet(1).</a>
1.308 brad 664: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 665: More stringent checking should be done in the copy(9)
666: functions to prevent their misuse.</a>
1.306 brad 667: <li><a href="errata35.html#locore">Feb 28, 2005:
668: More stringent checking should be done in the copy(9)
669: functions to prevent their misuse.</a>
1.304 brad 670: <li><a href="errata35.html#httpd3">Jan 12, 2005:
671: httpd(8)'s mod_include module fails to properly validate
672: the length of user supplied tag strings prior to copying
1.305 brad 673: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 674: <li><a href="errata35.html#pfkey">Dec 14, 2004:
675: On systems running isakmpd(8) it is possible for a local
676: user to cause kernel memory corruption and system panic by
1.303 markus 677: setting ipsec(4) credentials on a socket.</a>
1.301 miod 678: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 679: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 680: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 681: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 682: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 683: httpd(8)'s mod_rewrite module can be made to write one zero byte in
684: an arbitrary memory position outside of a char array, causing a DoS
685: or possibly buffer overflows.</a>
1.301 miod 686: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 687: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 688: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 689: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 690: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 691: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 692: Multiple remote vulnerabilities have been found in the cvs(1)
693: server which can be used by CVS clients to crash or execute
1.293 brad 694: arbitrary code on the server.</a>
1.301 miod 695: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 696: kdc(8) performs inadequate checking of request fields, leading
697: to the possibility of principal impersonation from other
698: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 699: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 700: xdm(1) ignores the requestPort resource and creates a
1.293 brad 701: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 702: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 703: A buffer overflow in the cvs(1) server has been found,
704: which can be used by CVS clients to execute arbitrary code on
1.293 brad 705: the server.</a>
1.301 miod 706: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 707: Integer overflow problems were found in procfs, allowing
1.293 brad 708: reading of arbitrary kernel memory.</a>
1.301 miod 709: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 710: Pathname validation problems have been found in cvs(1),
711: allowing clients and servers access to files outside the
1.293 brad 712: repository or local CVS tree.</a>
1.279 deraadt 713: </ul>
714:
715: <p>
716: <li>
1.288 matthieu 717: <a name="34"></a>
1.261 david 718:
1.294 david 719: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 720: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 721: in <a href="anoncvs.html">OpenBSD current</a>. The
722: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
723: you should update your machine.
1.261 david 724: <p>
725: <ul>
1.302 markus 726: <li><a href="errata34.html#pfkey">Dec 14, 2004:
727: On systems running isakmpd(8) it is possible for a local
728: user to cause kernel memory corruption and system panic by
1.303 markus 729: setting ipsec(4) credentials on a socket.</a>
1.298 brad 730: <li><a href="errata34.html#xpm">Sep 16, 2004:
731: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 732: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
733: httpd(8)'s mod_rewrite module can be made to write one zero byte in
734: an arbitrary memory position outside of a char array, causing a DoS
735: or possibly buffer overflows.</a>
1.294 david 736: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 737: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 738: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 739: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 740: an attacker can delete IPsec tunnels at will.</a>
1.294 david 741: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 742: Multiple remote vulnerabilities have been found in the cvs(1)
743: server which can be used by CVS clients to crash or execute
1.293 brad 744: arbitrary code on the server.</a>
1.294 david 745: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 746: kdc(8) performs inadequate checking of request fields, leading
747: to the possibility of principal impersonation from other
748: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 749: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 750: A buffer overflow in the cvs(1) server has been found,
751: which can be used by CVS clients to execute arbitrary code on
752: the server.</a>
1.294 david 753: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 754: Integer overflow problems were found in procfs, allowing
755: reading of arbitrary kernel memory.</a>
1.294 david 756: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 757: Pathname validation problems have been found in cvs(1),
758: allowing clients and servers access to files outside the
759: repository or local CVS tree.</a>
1.294 david 760: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 761: A missing check for a NULL-pointer dereference may allow a
1.281 otto 762: remote attacker to crash applications using OpenSSL.</a>
1.294 david 763: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 764: Defects in the payload validation and processing functions of
765: isakmpd have been discovered. An attacker could send malformed
766: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 767: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 768: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
769: access module, using IP addresses without a netmask on big endian
770: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 771: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 772: An IPv6 MTU handling problem exists that could be used by an
773: attacker to cause a denial of service attack.</a>
1.294 david 774: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 775: A reference counting bug in shmat(2) could be used to write to
776: kernel memory under certain circumstances.</a>
1.294 david 777: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 778: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 779: by Thomas Walpuski.</a>
1.294 david 780: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 781: It may be possible for a local user to overrun the stack in
782: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 783: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 784: The use of certain ASN.1 encodings or malformed public keys may
785: allow an attacker to mount a denial of service attack against
786: applications linked with ssl(3).</a>
1.261 david 787: </ul>
788:
789: <li>
1.288 matthieu 790: <a name="33"></a>
1.246 deraadt 791:
1.294 david 792: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 793: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 794: in <a href="anoncvs.html">OpenBSD current</a>. The
795: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 796: you should update your machine.
1.246 deraadt 797: <p>
798: <ul>
1.294 david 799: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 800: Pathname validation problems have been found in cvs(1),
801: allowing clients and servers access to files outside the
802: repository or local CVS tree.</a>
1.294 david 803: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 804: A missing check for a NULL-pointer dereference may allow a
1.281 otto 805: remote attacker to crash applications using OpenSSL.</a>
1.294 david 806: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 807: Defects in the payload validation and processing functions of
808: isakmpd have been discovered. An attacker could send malformed
809: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 810: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 811: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
812: access module, using IP addresses without a netmask on big endian
813: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 814: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 815: An IPv6 MTU handling problem exists that could be used by an
816: attacker to cause a denial of service attack.</a>
1.294 david 817: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 818: A reference counting bug in shmat(2) could be used to write to
819: kernel memory under certain circumstances.</a>
1.294 david 820: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 821: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 822: by Thomas Walpuski.</a>
1.294 david 823: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 824: It may be possible for a local user to execute arbitrary code
825: resulting in escalation of privileges due to a stack overrun
826: in compat_ibcs2(8).</a>
1.294 david 827: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 828: The use of certain ASN.1 encodings or malformed public keys may
829: allow an attacker to mount a denial of service attack against
830: applications linked with ssl(3).</a>
1.294 david 831: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 832: Access of freed memory in pf(4) could be used to
1.260 margarid 833: remotely panic a machine using scrub rules.</a>
1.294 david 834: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 835: A buffer overflow in the address parsing in
836: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 837: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 838: OpenSSH versions prior to 3.7 contains a buffer management error
839: that is potentially exploitable.</a>
1.294 david 840: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 841: Root may be able to reduce the security level by taking advantage of
842: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 843: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 844: An improper bounds check in the kernel may allow a local user
845: to panic the kernel.</a>
1.294 david 846: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 847: An off-by-one error exists in the C library function realpath(3)
848: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 849: </ul>
850:
1.265 miod 851:
1.247 david 852: <p>
1.246 deraadt 853: <li>
1.288 matthieu 854: <a name="32"></a>
1.224 deraadt 855:
1.294 david 856: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 857: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 858: in <a href="anoncvs.html">OpenBSD current</a>. The
859: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 860: you should update your machine.
1.224 deraadt 861: <p>
862: <ul>
1.294 david 863: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 864: The use of certain ASN.1 encodings or malformed public keys may
865: allow an attacker to mount a denial of service attack against
866: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 867: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 868: Access of freed memory in pf(4) could be used to
1.260 margarid 869: remotely panic a machine using scrub rules.</a>
1.294 david 870: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 871: A buffer overflow in the address parsing in
872: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 873: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 874: OpenSSH versions prior to 3.7 contains a buffer management error
875: that is potentially exploitable.</a>
1.294 david 876: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 877: Fix for a potential security issue in
878: sendmail(8) with respect to DNS maps.</a>
1.294 david 879: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 880: An off-by-one error exists in the C library function realpath(3)
881: may allow an attacker to gain escalated privileges.</a>
1.294 david 882: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 883: A buffer overflow in the address parsing in
884: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 885: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 886: A cryptographic weaknesses in the Kerberos v4 protocol can be
887: exploited on Kerberos v5 as well.</a>
1.294 david 888: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 889: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 890: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 891: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 892: Various SSL and TLS operations in OpenSSL are vulnerable to
893: timing attacks.</a>
1.294 david 894: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 895: A buffer overflow in lprm(1) may allow an attacker to elevate
896: privileges to user daemon.</a>.
1.294 david 897: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 898: A buffer overflow in the envelope comments processing in
899: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 900: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 901: httpd(8) leaks file inode numbers via ETag header as well as
902: child PIDs in multipart MIME boundary generation. This could
903: lead, for example, to NFS exploitation because it uses inode
904: numbers as part of the file handle.</a>
1.294 david 905: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 906: In ssl(8) an information leak can occur via timing by performing
907: a MAC computation even if incorrect block cipher padding has
908: been found, this is a countermeasure. Also, check for negative
909: sizes, in allocation routines.</a>
1.294 david 910: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 911: A double free exists in cvs(1) that could lead to privilege
912: escalation for cvs configurations where the cvs command is
1.233 margarid 913: run as a privileged user.</a>
1.294 david 914: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 915: A buffer overflow exists in named(8) that could lead to a
916: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 917: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 918: A logic error in the pool kernel memory allocator could cause
919: memory corruption in low-memory situations, causing the system
920: to crash.</a>
1.294 david 921: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 922: An attacker can bypass smrsh(8)'s restrictions and execute
923: arbitrary commands with the privileges of his own account.</a>
1.294 david 924: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 925: Network bridges running pf with scrubbing enabled could cause
926: mbuf corruption, causing the system to crash.</a>
1.294 david 927: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 928: A buffer overflow can occur in the kadmind(8) daemon, leading
929: to possible remote crash or exploit.</a>
1.224 deraadt 930: </ul>
931:
1.227 miod 932: <p>
933: <li>
1.288 matthieu 934: <a name="31"></a>
1.203 deraadt 935:
1.294 david 936: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 937: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 938: in <a href="anoncvs.html">OpenBSD current</a>. The
939: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 940: you should update your machine.
1.203 deraadt 941:
942: <p>
943: <ul>
1.294 david 944: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 945: A buffer overflow in the address parsing in
946: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 947: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 948: A cryptographic weaknesses in the Kerberos v4 protocol can be
949: exploited on Kerberos v5 as well.</a>
1.294 david 950: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 951: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 952: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 953: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 954: Various SSL and TLS operations in OpenSSL are vulnerable to
955: timing attacks.</a>
1.294 david 956: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 957: A buffer overflow in lprm(1) may allow an attacker to gain
958: root privileges.</a>
1.294 david 959: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 960: A buffer overflow in the envelope comments processing in
961: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 962: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 963: In ssl(8) an information leak can occur via timing by performing
964: a MAC computation even if incorrect block cipher padding has
965: been found, this is a countermeasure. Also, check for negative
966: sizes, in allocation routines.</a>
1.294 david 967: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 968: A double free exists in cvs(1) that could lead to privilege
969: escalation for cvs configurations where the cvs command is
1.294 david 970: run as a privileged user</a>.
971: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 972: A buffer overflow exists in named(8) that could lead to a
973: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 974: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 975: Incorrect argument checking in the getitimer(2) system call
976: may allow an attacker to crash the system.</a>
1.294 david 977: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 978: An attacker can bypass smrsh(8)'s restrictions and execute
979: arbitrary commands with the privileges of his own account.</a>
1.294 david 980: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 981: A buffer overflow can occur in the kadmind(8) daemon, leading
982: to possible remote crash or exploit.</a>
1.294 david 983: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 984: Incorrect argument checking in the setitimer(2) system call
985: may allow an attacker to write to kernel memory.</a>
1.294 david 986: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 987: An insufficient boundary check in the select system call
1.220 miod 988: allows an attacker to overwrite kernel memory and execute arbitrary code
989: in kernel context.</a>
1.294 david 990: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 991: Several remote buffer overflows can occur in the SSL2 server and SSL3
992: client of the ssl(8) library, as in the ASN.1 parser code in the
993: crypto(3) library, all of them being potentially remotely
994: exploitable.</a>
1.294 david 995: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 996: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
997: possible remote crash.</a>
1.294 david 998: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 999: A race condition exists in the pppd(8) daemon which may cause it to
1000: alter the file permissions of an arbitrary file.</a>
1.294 david 1001: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1002: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1003: crash.</a>
1.294 david 1004: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1005: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1006: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1007: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1008: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1009: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1010: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1011: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1012: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1013: input validation error that can result in an integer overflow and
1014: privilege escalation.</a>
1.294 david 1015: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1016: A buffer overflow can occur during the interpretation of chunked
1017: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1018: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1019: Under certain conditions, on systems using YP with netgroups
1020: in the password database, it is possible that sshd(8) does
1021: ACL checks for the requested user name but uses the password
1022: database entry of a different user for authentication. This
1023: means that denied users might authenticate successfully
1024: while permitted users could be locked out.</a>
1.294 david 1025: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1026: A race condition exists that could defeat the kernel's
1027: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1028: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1029: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1030: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1031: A local user can gain super-user privileges due to a buffer
1032: overflow in sshd(8) if AFS has been configured on the system
1033: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1034: in the sshd_config file.</a>
1.203 deraadt 1035: </ul>
1036:
1.235 miod 1037: <p>
1.203 deraadt 1038: <li>
1.288 matthieu 1039: <a name="30"></a>
1.187 deraadt 1040:
1.294 david 1041: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1042: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1043: in <a href="anoncvs.html">OpenBSD current</a>. The
1044: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1045: you should update your machine.
1.187 deraadt 1046:
1047: <p>
1048: <ul>
1.294 david 1049: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1050: A buffer overflow exists in named(8) that could lead to a
1051: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1052: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1053: Incorrect argument checking in the getitimer(2) system call
1054: may allow an attacker to crash the system.</a>
1.294 david 1055: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1056: An attacker can bypass smrsh(8)'s restrictions and execute
1057: arbitrary commands with the privileges of his own account.</a>
1.294 david 1058: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1059: A buffer overflow can occur in the kadmind(8) daemon, leading
1060: to possible remote crash or exploit.</a>
1.294 david 1061: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1062: Incorrect argument checking in the setitimer(2) system call
1063: may allow an attacker to write to kernel memory.</a>
1.294 david 1064: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1065: An insufficient boundary check in the select and poll system calls
1066: allows an attacker to overwrite kernel memory and execute arbitrary code
1067: in kernel context.</a>
1.294 david 1068: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1069: Several remote buffer overflows can occur in the SSL2 server and SSL3
1070: client of the ssl(8) library, as in the ASN.1 parser code in the
1071: crypto(3) library, all of them being potentially remotely
1072: exploitable.</a>
1.294 david 1073: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1074: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1075: possible remote crash.</a>
1.294 david 1076: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1077: A race condition exists in the pppd(8) daemon which may cause it to
1078: alter the file permissions of an arbitrary file.</a>
1.294 david 1079: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1080: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1081: crash.</a>
1.294 david 1082: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1083: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1084: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1085: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1086: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1087: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1088: input validation error that can result in an integer overflow and
1089: privilege escalation.</a>
1.294 david 1090: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1091: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1092: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1093: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1094: A buffer overflow can occur during the interpretation of chunked
1095: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1096: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1097: A race condition exists that could defeat the kernel's
1098: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1099: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1100: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1101: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1102: A local user can gain super-user privileges due to a buffer
1103: overflow in sshd(8) if AFS has been configured on the system
1104: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1105: in the sshd_config file.</a>
1.294 david 1106: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1107: The mail(1) was interpreting tilde escapes even when invoked
1108: in non-interactive mode. As mail(1) is called as root from cron,
1109: this can lead to a local root compromise.</a>
1.294 david 1110: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1111: Under certain conditions, on systems using YP with netgroups in
1112: the password database, it is possible for the rexecd(8) and rshd(8)
1113: daemons to execute a shell from a password database entry for a
1114: different user. Similarly, atrun(8) may change to the wrong
1115: home directory when running jobs.</a>
1.294 david 1116: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1117: A potential double free() exists in the zlib library;
1118: this is not exploitable on OpenBSD.
1119: The kernel also contains a copy of zlib; it is not
1120: currently known if the kernel zlib is exploitable.</a>
1.294 david 1121: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1122: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1123: may allow a local user to gain super-user privileges.</a>
1.294 david 1124: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1125: A race condition between the ptrace(2) and execve(2) system calls
1126: allows an attacker to modify the memory contents of suid/sgid
1127: processes which could lead to compromise of the super-user account.</a>
1.294 david 1128: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1129: There is a security hole in sudo(8) that can be exploited
1130: when the Postfix sendmail replacement is installed that may
1131: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1132: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1133: An attacker can trick a machine running the lpd daemon into
1134: creating new files in the root directory from a machine with
1135: remote line printer access.</a>
1.294 david 1136: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1137: The vi.recover script can be abused in such a way as
1138: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1139: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1140: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1141: resulting in a crash.</a>
1.294 david 1142: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1143: A security hole that may allow an attacker to partially authenticate
1144: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1145: </ul>
1146:
1147: <p>
1148: <li>
1.288 matthieu 1149: <a name="29"></a>
1.173 deraadt 1150:
1.294 david 1151: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1152: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1153: in <a href="anoncvs.html">OpenBSD current</a>. The
1154: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1155: you should update your machine.
1156:
1.173 deraadt 1157:
1158: <p>
1159: <ul>
1.294 david 1160: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1161: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1162: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1163: A race condition exists that could defeat the kernel's
1164: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1165: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1166: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1167: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1168: A local user can gain super-user privileges due to a buffer
1169: overflow in sshd(8) if AFS has been configured on the system
1170: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1171: in the sshd_config file.</a>
1.294 david 1172: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1173: The mail(1) was interpreting tilde escapes even when invoked
1174: in non-interactive mode. As mail(1) is called as root from cron,
1175: this can lead to a local root compromise.</a>
1.294 david 1176: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1177: A potential double free() exists in the zlib library;
1178: this is not exploitable on OpenBSD.
1179: The kernel also contains a copy of zlib; it is not
1180: currently known if the kernel zlib is exploitable.</a>
1.294 david 1181: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1182: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1183: may allow a local user to gain super-user privileges.</a>
1.294 david 1184: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1185: A race condition between the ptrace(2) and execve(2) system calls
1186: allows an attacker to modify the memory contents of suid/sgid
1187: processes which could lead to compromise of the super-user account.</a>
1.294 david 1188: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1189: There is a security hole in sudo(8) that can be exploited
1190: when the Postfix sendmail replacement is installed that may
1191: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1192: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1193: An attacker can trick a machine running the lpd daemon into
1194: creating new files in the root directory from a machine with
1195: remote line printer access.</a>
1.294 david 1196: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1197: The vi.recover script can be abused in such a way as
1198: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1199: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1200: A security hole exists in uuxqt(8) that may allow an
1201: attacker to gain root privileges.</a>
1.294 david 1202: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1203: A security hole exists in lpd(8) that may allow an
1204: attacker to gain root privileges if lpd is running.</a>
1.294 david 1205: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1206: A security hole exists in sendmail(8) that may allow an
1207: attacker on the local host to gain root privileges.</a>
1.294 david 1208: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1209: A kernel buffer overflow in the NFS code can be used to execute
1210: arbitrary code by users with mount privileges (only root by
1.181 millert 1211: default).</a>
1.294 david 1212: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1213: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1214: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1215: sshd(8) allows users to delete arbitrary files named "cookies"
1216: if X11 forwarding is enabled. X11 forwarding is disabled
1217: by default.</a>
1.294 david 1218: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1219: Programs using the fts routines can be tricked into changing
1220: into the wrong directory.</a>
1.294 david 1221: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1222: Sendmail signal handlers contain unsafe code,
1223: leading to numerous race conditions.</a>
1.173 deraadt 1224: </ul>
1225:
1226: <p>
1227: <li>
1.288 matthieu 1228: <a name="28"></a>
1.152 deraadt 1229:
1.294 david 1230: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1231: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1232: in <a href="anoncvs.html">OpenBSD current</a>. The
1233: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1234: you should update your machine.
1235:
1.152 deraadt 1236:
1237: <p>
1238: <ul>
1.294 david 1239: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1240: A security hole exists in uuxqt(8) that may allow an
1241: attacker to gain root privileges.</a>
1.294 david 1242: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1243: A security hole exists in lpd(8) that may allow an
1244: attacker to gain root privileges if lpd is running.</a>
1.294 david 1245: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1246: A security hole exists in sendmail(8) that may allow an
1247: attacker on the local host to gain root privileges.</a>
1.294 david 1248: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1249: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1250: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1251: Programs using the fts routines can be tricked into changing
1252: into the wrong directory.</a>
1.294 david 1253: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1254: Sendmail signal handlers contain unsafe code,
1255: leading to numerous race conditions.</a>
1.294 david 1256: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1257: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1258: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1259: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1260: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1261: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1262: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1263: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1264: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1265: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1266: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1267: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1268: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1269: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1270: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1271: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1272: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1273: rnd(4) did not use all of its input when written to.</a>
1.294 david 1274: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1275: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1276: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1277: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1278: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1279: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1280: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1281: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1282: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1283: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1284: </ul>
1285:
1286: <p>
1287: <li>
1.288 matthieu 1288: <a name="27"></a>
1.124 deraadt 1289:
1.294 david 1290: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1291: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1292: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1293: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1294:
1295: <p>
1296: <ul>
1.294 david 1297: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1298: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1299: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1300: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1301: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1302: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1303: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1304: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1305: (patch included)</a>
1.294 david 1306: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1307: X11 libraries have 2 potential overflows in xtrans code.
1308: (patch included)</a>
1.294 david 1309: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1310: Apache mod_rewrite and mod_vhost_alias modules could expose files
1311: on the server in certain configurations if used.
1312: (patch included)</a>
1.294 david 1313: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1314: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1315: TERMPATH and TERMCAP environment variables as it should.
1316: (patch included)</a>
1.294 david 1317: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1318: There are printf-style format string bugs in several privileged
1319: programs. (patch included)</a>
1.294 david 1320: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1321: libcurses honored terminal descriptions in the $HOME/.terminfo
1322: directory as well as in the TERMCAP environment variable for
1323: setuid and setgid applications.
1.146 deraadt 1324: (patch included)</a>
1.294 david 1325: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1326: A format string vulnerability exists in talkd(8).
1327: (patch included)</a>
1.294 david 1328: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1329: A format string vulnerability exists in the pw_error() function of the
1330: libutil library, yielding localhost root through chpass(1).
1331: (patch included)</a>
1.294 david 1332: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1333: Bad ESP/AH packets could cause a crash under certain conditions.
1334: (patch included)</a>
1.294 david 1335: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1336: A format string vulnerability (localhost root) exists in xlock(1).
1337: (patch included)</a>
1.294 david 1338: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1339: Various bugs found in X11 libraries have various side effects, almost
1340: completely denial of service in OpenBSD.
1341: (patch included)</a>
1.294 david 1342: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1343: Just like pretty much all the other unix ftp daemons
1344: on the planet, ftpd had a remote root hole in it.
1345: Luckily, ftpd was not enabled by default.
1.137 deraadt 1346: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1347: (patch included)</a>
1.294 david 1348: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1349: Mopd, very rarely used, contained some buffer overflows.
1350: (patch included)</a>
1.294 david 1351: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1352: libedit would check for a <b>.editrc</b> file in the current
1353: directory. Not known to be a real security issue, but a patch
1354: is available anyways.
1355: (patch included)</a>
1.294 david 1356: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1357: A serious bug in dhclient(8) could allow strings from a
1358: malicious dhcp server to be executed in the shell as root.
1359: (patch included)</a>
1.294 david 1360: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1361: A serious bug in isakmpd(8) policy handling wherein
1362: policy verification could be completely bypassed in isakmpd.
1363: (patch included)</a>
1.294 david 1364: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1365: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1366: should not be used, and results in security problems on
1367: other operating systems.</a>
1.294 david 1368: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1369: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1370: (patch included)</a>
1.294 david 1371: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1372: Improper use of ipf <i>keep-state</i> rules can result
1373: in firewall rules being bypassed. (patch included)</a>
1374:
1.124 deraadt 1375: </ul>
1376:
1377: <p>
1378: <li>
1.288 matthieu 1379: <a name="26"></a>
1.119 deraadt 1380:
1.294 david 1381: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1382: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1383: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1384: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1385:
1386: <p>
1387: <ul>
1.294 david 1388: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1389: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1390: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1391: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1392: Improper use of ipf <i>keep-state</i> rules can result
1393: in firewall rules being bypassed. (patch included)</a>
1.294 david 1394: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1395: xlockmore has a bug which a localhost attacker can use to gain
1396: access to the encrypted root password hash (which is normally
1.245 miod 1397: encoded using blowfish</a> (see
1.294 david 1398: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1399: crypt(3)</a>)
1.245 miod 1400: (patch included).
1.294 david 1401: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1402: Systems running with procfs enabled and mounted are
1403: vulnerable to a very tricky exploit. procfs is not
1404: mounted by default.
1405: (patch included).</a>
1.294 david 1406: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1407: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1408: thus exposing the system to a race where the aliases file
1409: did not exist.
1.119 deraadt 1410: (patch included).</a>
1.294 david 1411: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1412: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1413: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1414: A buffer overflow in the RSAREF code included in the
1415: USA version of libssl, is possibly exploitable in
1416: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1417: (patch included).<br></a>
1418: <strong>Update:</strong> Turns out that this was not exploitable
1419: in any of the software included in OpenBSD 2.6.
1.294 david 1420: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1421: Any user could change interface media configurations, resulting in
1422: a localhost denial of service attack.
1.121 deraadt 1423: (patch included).</a>
1.119 deraadt 1424: </ul>
1425:
1426: <p>
1427: <li>
1.288 matthieu 1428: <a name="25"></a>
1.106 deraadt 1429:
1.294 david 1430: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1431: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1432: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1433: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1434:
1.96 deraadt 1435: <p>
1.104 deraadt 1436: <ul>
1.294 david 1437: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1438: In cron(8), make sure argv[] is NULL terminated in the
1439: fake popen() and run sendmail as the user, not as root.
1440: (patch included).</a>
1.294 david 1441: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1442: filesystems had an overrun in their handling of uio_offset
1443: in their readdir() routines. (These filesystems are not
1444: enabled by default). (patch included).</a>
1.294 david 1445: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1446: when we execve() a new process. (patch included).</a>
1.294 david 1447: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1448: been handled by IPsec may be transmitted as cleartext.
1449: PF_KEY SA expirations may leak kernel resources.
1450: (patch included).</a>
1.294 david 1451: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1452: motd re-writing and change the find(1) to use -execdir
1453: (patch included).</a>
1.294 david 1454: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1455: users to chflags(2) or fchflags(2) on character or block devices
1456: which they may currently be the owner of (patch included).</a>
1.294 david 1457: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1458: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1459: </ul>
1460:
1.106 deraadt 1461: <p>
1462: <li>
1.288 matthieu 1463: <a name="24"></a>
1.235 miod 1464:
1.294 david 1465: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1466: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1467: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1468: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1469:
1.96 deraadt 1470: <p>
1.75 deraadt 1471: <ul>
1.294 david 1472: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1473: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1474: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1475: another kernel crash case caused by the <strong>crashme</strong>
1476: program (patch included).</a>
1.294 david 1477: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1478: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1479: (patch included).</a>
1.294 david 1480: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1481: existed in ping(8). (patch included).</a>
1.294 david 1482: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1483: the ipq, which could permit an attacker to cause a crash.
1484: (patch included).</a>
1.294 david 1485: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1486: kernel between accept(2) and select(2) could permit an attacker
1487: to hang sockets from remote.
1488: (patch included).</a>
1.294 david 1489: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1490: bog the machine excessively and cause problems.
1491: (patch included).</a>
1.294 david 1492: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1493: DDB interacted to possibly cause a crash.
1494: (patch included).</a>
1.294 david 1495: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1496: (patch included).</a>
1.294 david 1497: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1498: problem in bootpd(8). (patch included).</a>
1.294 david 1499: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1500: exploitable problem relating to environment variables in termcap
1501: and curses. (patch included).</a>
1.294 david 1502: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1503: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1504: </ul>
1505:
1.106 deraadt 1506: <p>
1507: <li>
1.288 matthieu 1508: <a name="23"></a>
1.235 miod 1509:
1.294 david 1510: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1511: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1512: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1513: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1514:
1.96 deraadt 1515: <p>
1.53 matthieu 1516: <ul>
1.294 david 1517: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1518: problem in bootpd(8). (patch included).</a>
1.294 david 1519: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1520: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1521: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1522: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1523: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1524: chpass(1) has a file descriptor leak which allows an
1525: attacker to modify /etc/master.passwd.</a>
1.294 david 1526: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1527: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1528: should not be executed with fd slots 0, 1, or 2 free.
1529: (patch included).</a>
1.294 david 1530: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1531: libraries (patches included).</a>
1.294 david 1532: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1533: processes too permissive (4th revision patch included).</a>
1.294 david 1534: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1535: of immutable and append-only file flags. (patch included).</a>
1.294 david 1536: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1537: if IPSEC is enabled (patch included).</a>
1.294 david 1538: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1539: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1540: </ul>
1.9 deraadt 1541:
1.106 deraadt 1542: <p>
1543: <li>
1.288 matthieu 1544: <a name="22"></a>
1.235 miod 1545:
1.294 david 1546: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1547: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1548: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1549: still exist in other operating systems. (The supplied patches are for
1550: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1551:
1.96 deraadt 1552: <p>
1.9 deraadt 1553: <ul>
1.294 david 1554: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1555: packets if IPSEC is enabled (patch included).</a>
1.294 david 1556: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1557: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1558: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1559: (patch included).</a>
1.294 david 1560: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1561: (patch included).</a>
1.294 david 1562: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1563: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1564: (patch included).</a>
1.294 david 1565: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1566: export (patch included).</a>
1.112 philen 1567: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1568: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1569: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1570: Acceptance.</a>
1.294 david 1571: A patch is available <a href="errata22.html#sourceroute">here</a>.
1572: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1573: flaw (patch included).</a>
1.294 david 1574: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1575: </ul>
1576:
1.106 deraadt 1577: <p>
1578: <li>
1.288 matthieu 1579: <a name="21"></a>
1.235 miod 1580:
1.294 david 1581: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1582: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1583: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1584: exist in other operating systems. (If you are running OpenBSD 2.1, we
1585: would strongly recommend an upgrade to the newest release, as this
1586: patch list only attempts at fixing the most important security
1587: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1588: security problems. Many of those problems were solved in ways which
1589: make it hard for us to provide patches).
1590:
1.96 deraadt 1591: <p>
1.52 deraadt 1592: <ul>
1.112 philen 1593: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1594: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1595: (patch included)</a>
1.112 philen 1596: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1597: </ul>
1.51 deraadt 1598:
1.106 deraadt 1599: <p>
1600: <li>
1.288 matthieu 1601: <a name="20"></a>
1.235 miod 1602:
1.294 david 1603: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1604: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1605: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1606: exist in other operating systems. (If you are running OpenBSD 2.0, we
1607: commend you for being there back in the old days!, but you're really
1608: missing out if you don't install a new version!)
1609:
1610: <p>
1611: <ul>
1.112 philen 1612: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1613: resolver (patch included)</a>
1614: <li>Many others... if people can hunt them down, please let me know
1615: and we'll put them up here.
1616: </ul>
1.51 deraadt 1617: <p>
1.106 deraadt 1618:
1.288 matthieu 1619: <a name="watching"></a>
1.294 david 1620: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1621:
1.21 deraadt 1622: Since we take a proactive stance with security, we are continually
1623: finding and fixing new security problems. Not all of these problems
1.80 espie 1624: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1625: confirmed to be exploitable; many simple bugs we fix do turn out to
1626: have security consequences we could not predict. We do not have the
1627: time resources to make these changes available in the above format.<p>
1.21 deraadt 1628:
1629: Thus there are usually minor security fixes in the current source code
1630: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1631: guarantee that these problems are of minimal impact and unproven
1.44 ian 1632: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1633: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1634:
1.45 deraadt 1635: People who are really concerned with security can do a number of
1636: things:<p>
1.21 deraadt 1637:
1638: <ul>
1639: <li>If you understand security issues, watch our
1.294 david 1640: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1641: eye out for things which appear security related. Since
1.21 deraadt 1642: exploitability is not proven for many of the fixes we make,
1643: do not expect the relevant commit message to say "SECURITY FIX!".
1644: If a problem is proven and serious, a patch will be available
1645: here very shortly after.
1.161 horacio 1646: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1647: security-announce mailing list</a> which will notify you for every
1.186 ian 1648: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1649: and instruct you on how to patch the problem.
1.21 deraadt 1650: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1651: complete system build from time to time (read /usr/src/Makefile
1652: carefully). Users can make the assumption that the current
1653: source tree always has stronger security than the previous release.
1.45 deraadt 1654: However, building your own system from source code is not trivial;
1.265 miod 1655: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1656: transition between major releases.
1.115 ericj 1657: <li>Install a binary snapshot for your
1.80 espie 1658: architecture, which are made available fairly often. For
1.29 deraadt 1659: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1660: </ul>
1661:
1.9 deraadt 1662: <p>
1.288 matthieu 1663: <a name="reporting"></a>
1.294 david 1664: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1665:
1.5 deraadt 1666: <p> If you find a new security problem, you can mail it to
1.294 david 1667: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1668: <br>
1.5 deraadt 1669: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1670: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1671:
1.107 deraadt 1672: <p>
1.288 matthieu 1673: <a name="papers"></a>
1.294 david 1674: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1675:
1676: A number of papers have been written by OpenBSD team members, about security
1677: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1678: documents are available as follows.<p>
1.107 deraadt 1679:
1680: <ul>
1.113 deraadt 1681: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1682: <a href="events.html#usenix99">Usenix 1999</a>,
1683: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1684: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1685: <a href="papers/bcrypt-paper.ps">paper</a> and
1686: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1687: <p>
1688: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1689: <a href="events.html#usenix99">Usenix 1999</a>,
1690: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1691: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1692: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1693: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1694: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1695: <a href="papers/crypt-paper.ps">paper</a> and
1696: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1697: <p>
1698: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1699: <a href="events.html#usenix99">Usenix 1999</a>,
1700: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1701: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1702: <a href="papers/strlcpy-paper.ps">paper</a> and
1703: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1704: <p>
1.118 deraadt 1705: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1706: <a href="events.html#lisa99">LISA 1999</a>,
1707: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1708: <a href="papers/authgw-paper.ps">paper</a> and
1709: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1710: <p>
1.153 jufi 1711: <li>Encrypting Virtual Memory<br>
1.294 david 1712: <a href="events.html#sec2000">Usenix Security 2000</a>,
1713: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1714: <a href="papers/swapencrypt.ps">paper</a> and
1715: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1716: <p>
1.107 deraadt 1717: </ul>
1.294 david 1718: </ul>
1.106 deraadt 1719:
1.2 deraadt 1720: <hr>
1.294 david 1721: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1722: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1723: <br>
1.373 ! djm 1724: <small>$OpenBSD: security.html,v 1.372 2009/02/22 22:09:38 millert Exp $</small>
1.1 deraadt 1725:
1.24 deraadt 1726: </body>
1727: </html>
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