Annotation of www/security.html, Revision 1.375
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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>
1.374 sthen 242: <li><a href="errata45.html#002_pf">April 11, 2009:
243: When pf attempts to perform translation on a specially
244: crafted IP datagram, a null pointer dereference will occur,
245: resulting in a kernel panic.</a>
1.373 djm 246: <li><a href="errata45.html#001_openssl">April 8, 2009:
247: OpenSSL's ASN.1 handling code could be forced to make invalid
248: memory accesses by certain invalid strings or structures, allowing
249: denial-of-service attacks.</a>
250: </ul>
251:
252: <li>
1.365 deraadt 253: <a name="44"></a>
254:
255: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
256: These are the OpenBSD 4.4 advisories -- all these problems are solved
257: in <a href=anoncvs.html>OpenBSD current</a> and the
258: <a href=stable.html>patch branch</a>.
259:
260: <p>
261: <ul>
1.374 sthen 262: <li><a href="errata44.html#013_pf">April 11, 2009:
263: When pf attempts to perform translation on a specially
264: crafted IP datagram, a null pointer dereference will occur,
265: resulting in a kernel panic.</a>
1.373 djm 266: <li><a href="errata44.html#012_openssl">April 8, 2009:
267: OpenSSL's ASN.1 handling code could be forced to make invalid
268: memory accesses by certain invalid strings or structures, allowing
269: denial-of-service attacks.</a>
1.372 millert 270: <li><a href="errata44.html#011_sudo">February 22, 2009:
271: sudo(8) may allow a user listed in sudoers to run a command
272: as a different user than their access rule specifies when a Unix
273: group is used in the RunAs portion of the rule.</a>
1.370 djm 274: <li><a href="errata44.html#008_bind">January 15, 2009:
275: named(8) suffered from a similar logic error that may allow
276: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 277: <li><a href="errata44.html#007_openssl">January 9, 2009:
278: OpenSSL suffered from some logic errors that allowed bypass
279: of DSA/ECDSA certificate validation.</a>
1.367 brad 280: <li><a href="errata44.html#001_ndp">November 2, 2008:
281: The Neighbor Discovery Protocol (ndp) did not correctly verify
282: neighbor solicitation requests maybe allowing a nearby attacker
283: to intercept traffic.</a>
1.365 deraadt 284: </ul>
285:
1.375 ! miod 286: <p>
! 287: OpenBSD 4.3 and earlier releases are not supported anymore. The following
! 288: paragraphs only list advisories issued while they were maintained; these
! 289: releases are likely to be affected by the advisories for more recent releases.
! 290: <br>
! 291:
1.365 deraadt 292: <li>
1.357 brad 293: <a name="43"></a>
294:
295: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
296: These are the OpenBSD 4.3 advisories -- all these problems are solved
297: in <a href=anoncvs.html>OpenBSD current</a> and the
298: <a href=stable.html>patch branch</a>.
299:
300: <p>
301: <ul>
1.374 sthen 302: <li><a href="errata43.html#013_pf">April 11, 2009:
303: When pf attempts to perform translation on a specially
304: crafted IP datagram, a null pointer dereference will occur,
305: resulting in a kernel panic.</a>
1.373 djm 306: <li><a href="errata43.html#012_openssl">April 8, 2009:
307: OpenSSL's ASN.1 handling code could be forced to make invalid
308: memory accesses by certain invalid strings or structures, allowing
309: denial-of-service attacks.</a>
1.372 millert 310: <li><a href="errata43.html#011_sudo">February 22, 2009:
311: sudo(8) may allow a user listed in sudoers to run a command
312: as a different user than their access rule specifies when a Unix
313: group is used in the RunAs portion of the rule.</a>
1.370 djm 314: <li><a href="errata43.html#008_bind">January 15, 2009:
315: named(8) suffered from a similar logic error that may allow
316: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 317: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 318: OpenSSL suffered from some logic errors that allowed bypass
319: of DSA/ECDSA certificate validation.</a>
1.363 brad 320: <li><a href="errata43.html#005_ndp">October 2, 2008:
321: The Neighbor Discovery Protocol (ndp) did not correctly verify
322: neighbor solicitation requests maybe allowing a nearby attacker
323: to intercept traffic.</a>
1.362 brad 324: <li><a href="errata43.html#004_bind">July 23, 2008:
325: A vulnerability has been found with BIND.</a>
1.361 brad 326: <li><a href="errata43.html#003_xorg">July 15, 2008:
327: Multiple vulnerabilities in X.Org.</a>
1.359 brad 328: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 329: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 330: <li><a href="errata43.html#001_openssh">March 30, 2008:
331: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 332: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 333: </ul>
334:
335: <li>
1.348 merdely 336: <a name="42"></a>
337: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
338: These are the OpenBSD 4.2 advisories -- all these problems are solved
339: in <a href=anoncvs.html>OpenBSD current</a> and the
340: <a href=stable.html>patch branch</a>.
341:
342: <p>
343: <ul>
1.364 tobias 344: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 345: The Neighbor Discovery Protocol (ndp) did not correctly verify
346: neighbor solicitation requests maybe allowing a nearby attacker
347: to intercept traffic.</a>
1.362 brad 348: <li><a href="errata42.html#013_bind">July 23, 2008:
349: A vulnerability has been found with BIND.</a>
1.361 brad 350: <li><a href="errata42.html#012_xorg2">July 15, 2008:
351: Multiple vulnerabilities in X.Org.</a>
1.359 brad 352: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 353: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 354: <li><a href="errata42.html#010_openssh">March 30, 2008:
355: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 356: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 357: <li><a href="errata42.html#009_ppp">March 7, 2008:
358: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 359: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
360: Multiple vulnerabilities in X.Org.</a>
1.352 henning 361: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
362: A missing NULL pointer check can lead to a kernel panic.</a>
363: <li><a href="errata42.html#004_pf">Nov 27, 2007:
364: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 365: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
366: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 367: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 368: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 369: </ul>
370:
371: <li>
1.346 matthieu 372: <a name="41"></a>
373:
374: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
375: These are the OpenBSD 4.1 advisories -- all these problems are solved
376: in <a href=anoncvs.html>OpenBSD current</a> and the
377: <a href=stable.html>patch branch</a>.
378:
379: <p>
380: <ul>
1.359 brad 381: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 382: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 383: <li><a href="errata41.html#015_openssh">March 30, 2008:
384: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 385: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 386: <li><a href="errata41.html#014_ppp">March 7, 2008:
387: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 388: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
389: Multiple vulnerabilities in X.Org.</a>
390: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
391: The SSL_get_shared_ciphers() function in OpenSSL contains
392: an off-by-one overflow.</a>
1.350 deraadt 393: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 394: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 395: <li><a href="errata41.html#009_file">Jul 9, 2007:
396: Fix possible heap overflow in file(1).</a>
1.346 matthieu 397: <li><a href="errata41.html#005_route6">Apr 27, 2007:
398: IPv6 type 0 route headers can be used to mount a DoS attack
399: against hosts and networks.</a>
400: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
401: Multiple vulnerabilities in X.Org.</a>
402: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
403: Incorrect mbuf handling for ICMP6 packets.</a>
404: </ul>
405:
406: <li>
1.334 brad 407: <a name="40"></a>
408: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
409: These are the OpenBSD 4.0 advisories -- all these problems are solved
410: in <a href=anoncvs.html>OpenBSD current</a> and the
411: <a href=stable.html>patch branch</a>.
412:
413: <p>
414: <ul>
1.350 deraadt 415: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 416: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 417: <li><a href="errata40.html#015_file">Jul 9, 2007:
418: Fix possible heap overflow in file(1).</a>
1.343 deraadt 419: <li><a href="errata40.html#012_route6">Apr 23, 2007:
420: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 421: against hosts and networks.</a>
1.342 mbalmer 422: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
423: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 424: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
425: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 426: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 427: Insufficient validation in vga(4) may allow an attacker to gain
428: root privileges on some i386 systems.</a>
1.339 deraadt 429: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 430: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 431: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 432: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
433: found by Chris Evans.</a>
1.339 deraadt 434: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 435: Several problems have been found in OpenSSL.</a>
1.339 deraadt 436: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 437: httpd(8) does not sanitize the Expect header from an HTTP request
438: when it is reflected back in an error message, which might allow
439: cross-site scripting (XSS) style attacks.</a>
440: </ul>
441:
442: <li>
1.321 brad 443: <a name="39"></a>
444:
445: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
446: These are the OpenBSD 3.9 advisories -- all these problems are solved
447: in <a href=anoncvs.html>OpenBSD current</a> and the
448: <a href=stable.html>patch branch</a>.
449:
450: <p>
451: <ul>
1.343 deraadt 452: <li><a href="errata39.html#022_route6">Apr 23, 2007:
453: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 454: against hosts and networks.</a>
1.342 mbalmer 455: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
456: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 457: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
458: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 459: <li><a href="errata39.html#agp">Jan 3, 2007:
460: Insufficient validation in vga(4) may allow an attacker to gain
461: root privileges on some i386 systems.</a>
1.336 brad 462: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 463: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 464: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 465: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 466: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 467: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 468: found by Chris Evans.</a>
1.333 deraadt 469: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 470: Several problems have been found in OpenSSL.</a>
1.333 deraadt 471: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 472: httpd(8) does not sanitize the Expect header from an HTTP request
473: when it is reflected back in an error message, which might allow
474: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 475: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 476: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
477: possible for an attacker to construct an invalid signature which
478: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 479: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 480: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 481: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 482: Due to the failure to correctly validate LCP configuration option
483: lengths, it is possible for an attacker to send LCP packets via an
484: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 485: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 486: A problem in isakmpd(8) caused IPsec to run partly without replay
487: protection.</a>
1.333 deraadt 488: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 489: It is possible to cause the kernel to panic when more than the default
490: number of sempahores have been allocated.</a>
1.333 deraadt 491: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 492: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
493: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
494: option.</a>
1.333 deraadt 495: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 496: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 497: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 498: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
499: overflow.</a>
1.333 deraadt 500: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 501: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 502: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 503: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 504: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 505: A race condition has been reported to exist in the handling by sendmail
506: of asynchronous signals.</a>
507: </ul>
508:
509: <li>
1.318 deraadt 510: <a name="38"></a>
511:
512: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
513: These are the OpenBSD 3.8 advisories -- all these problems are solved
514: in <a href=anoncvs.html>OpenBSD current</a> and the
515: <a href=stable.html>patch branch</a>.
516:
517: <p>
518: <ul>
1.332 brad 519: <li><a href="errata38.html#ssh2">Oct 12, 2006:
520: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 521: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 522: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 523: found by Chris Evans.</a>
524: <li><a href="errata38.html#openssl2">Oct 7, 2006:
525: Several problems have been found in OpenSSL.</a>
526: <li><a href="errata38.html#httpd2">Oct 7, 2006:
527: httpd(8) does not sanitize the Expect header from an HTTP request
528: when it is reflected back in an error message, which might allow
529: cross-site scripting (XSS) style attacks.</a>
1.329 brad 530: <li><a href="errata38.html#openssl">Sep 8, 2006:
531: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
532: possible for an attacker to construct an invalid signature which
533: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 534: <li><a href="errata38.html#bind">Sep 8, 2006:
535: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 536: <li><a href="errata38.html#sppp">Sep 2, 2006:
537: Due to the failure to correctly validate LCP configuration option
538: lengths, it is possible for an attacker to send LCP packets via an
539: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 540: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
541: A problem in isakmpd(8) caused IPsec to run partly without replay
542: protection.</a>
543: <li><a href="errata38.html#sem">Aug 25, 2006:
544: It is possible to cause the kernel to panic when more than the default
545: number of sempahores have been allocated.</a>
546: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
547: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
548: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
549: option.</a>
550: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
551: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 552: <li><a href="errata38.html#httpd">Jul 30, 2006:
553: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
554: overflow.</a>
1.324 brad 555: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
556: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 557: <li><a href="errata38.html#xorg">May 2, 2006:
558: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 559: <li><a href="errata38.html#sendmail">Mar 25, 2006:
560: A race condition has been reported to exist in the handling by sendmail
561: of asynchronous signals.</a>
562: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 563: Josh Bressers has reported a weakness in OpenSSH caused due to the
564: insecure use of the system(3) function in scp(1) when performing copy
565: operations using filenames that are supplied by the user from the
566: command line.</a>
1.321 brad 567: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 568: Do not allow users to trick suid programs into re-opening files via
569: /dev/fd.</a>
1.321 brad 570: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 571: A buffer overflow has been found in the Perl interpreter with the
572: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 573: </ul>
574:
575: <li>
1.312 david 576: <a name="37"></a>
577:
578: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
579: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 580: in <a href="anoncvs.html">OpenBSD current</a>. The
581: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
582: you should update your machine.
1.312 david 583:
584: <p>
585: <ul>
1.322 brad 586: <li><a href="errata37.html#xorg">May 2, 2006:
587: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 588: <li><a href="errata37.html#sendmail">Mar 25, 2006:
589: A race condition has been reported to exist in the handling by sendmail
590: of asynchronous signals.</a>
1.320 brad 591: <li><a href="errata37.html#ssh">Feb 12, 2006:
592: Josh Bressers has reported a weakness in OpenSSH caused due to the
593: insecure use of the system(3) function in scp(1) when performing copy
594: operations using filenames that are supplied by the user from the
595: command line.</a>
1.319 brad 596: <li><a href="errata37.html#fd">Jan 5, 2006:
597: Do not allow users to trick suid programs into re-opening files via
598: /dev/fd.</a>
599: <li><a href="errata37.html#perl">Jan 5, 2006:
600: A buffer overflow has been found in the Perl interpreter with the
601: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 602: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 603: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 604: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 605: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 606: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 607: Fix a race condition in sudo(8) that could allow a user
1.315 millert 608: to run arbitrary commands.</a>
1.318 deraadt 609: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 610: Fix a buffer overflow, memory leaks, and NULL pointer
611: dereference in cvs(1).</a>
1.312 david 612: </ul>
613:
614: <li>
1.301 miod 615: <a name="36"></a>
616:
617: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
618: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 619: in <a href="anoncvs.html">OpenBSD current</a>. The
620: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
621: you should update your machine.
1.301 miod 622:
623: <p>
1.302 markus 624: <ul>
1.317 millert 625: <li><a href="errata36.html#libz2">Jul 21, 2005:
626: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 627: <li><a href="errata36.html#libz">Jul 6, 2005:
628: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 629: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 630: Fix a race condition in sudo(8) that could allow a user
1.315 millert 631: to run arbitrary commands.</a>
1.311 deraadt 632: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 633: Fix a buffer overflow, memory leaks, and NULL pointer
634: dereference in cvs(1).</a>
1.311 deraadt 635: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 636: Due to buffer overflows in telnet(1), a malicious
637: server or man-in-the-middle attack could allow
638: execution of arbitrary code with the privileges of
639: the user invoking telnet(1).</a>
1.311 deraadt 640: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 641: More stringent checking should be done in the copy(9)
642: functions to prevent their misuse.</a>
1.311 deraadt 643: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 644: More stringent checking should be done in the copy(9)
645: functions to prevent their misuse.</a>
1.311 deraadt 646: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 647: httpd(8)'s mod_include module fails to properly validate
648: the length of user supplied tag strings prior to copying
1.305 brad 649: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 650: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 651: On systems running isakmpd(8) it is possible for a local
652: user to cause kernel memory corruption and system panic by
1.303 markus 653: setting ipsec(4) credentials on a socket.</a>
1.302 markus 654: </ul>
1.301 miod 655:
656: <li>
1.288 matthieu 657: <a name="35"></a>
1.279 deraadt 658:
1.294 david 659: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 660: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 661: in <a href="anoncvs.html">OpenBSD current</a>. The
662: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
663: you should update your machine.
1.279 deraadt 664:
665: <p>
666: <ul>
1.310 brad 667: <li><a href="errata35.html#cvs4">Apr 28, 2005:
668: Fix a buffer overflow, memory leaks, and NULL pointer
669: dereference in cvs(1).</a>
1.309 brad 670: <li><a href="errata35.html#telnet">Mar 30, 2005:
671: Due to buffer overflows in telnet(1), a malicious
672: server or man-in-the-middle attack could allow
673: execution of arbitrary code with the privileges of
674: the user invoking telnet(1).</a>
1.308 brad 675: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 676: More stringent checking should be done in the copy(9)
677: functions to prevent their misuse.</a>
1.306 brad 678: <li><a href="errata35.html#locore">Feb 28, 2005:
679: More stringent checking should be done in the copy(9)
680: functions to prevent their misuse.</a>
1.304 brad 681: <li><a href="errata35.html#httpd3">Jan 12, 2005:
682: httpd(8)'s mod_include module fails to properly validate
683: the length of user supplied tag strings prior to copying
1.305 brad 684: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 685: <li><a href="errata35.html#pfkey">Dec 14, 2004:
686: On systems running isakmpd(8) it is possible for a local
687: user to cause kernel memory corruption and system panic by
1.303 markus 688: setting ipsec(4) credentials on a socket.</a>
1.301 miod 689: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 690: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 691: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 692: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 693: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 694: httpd(8)'s mod_rewrite module can be made to write one zero byte in
695: an arbitrary memory position outside of a char array, causing a DoS
696: or possibly buffer overflows.</a>
1.301 miod 697: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 698: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 699: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 700: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 701: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 702: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 703: Multiple remote vulnerabilities have been found in the cvs(1)
704: server which can be used by CVS clients to crash or execute
1.293 brad 705: arbitrary code on the server.</a>
1.301 miod 706: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 707: kdc(8) performs inadequate checking of request fields, leading
708: to the possibility of principal impersonation from other
709: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 710: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 711: xdm(1) ignores the requestPort resource and creates a
1.293 brad 712: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 713: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 714: A buffer overflow in the cvs(1) server has been found,
715: which can be used by CVS clients to execute arbitrary code on
1.293 brad 716: the server.</a>
1.301 miod 717: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 718: Integer overflow problems were found in procfs, allowing
1.293 brad 719: reading of arbitrary kernel memory.</a>
1.301 miod 720: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 721: Pathname validation problems have been found in cvs(1),
722: allowing clients and servers access to files outside the
1.293 brad 723: repository or local CVS tree.</a>
1.279 deraadt 724: </ul>
725:
726: <p>
727: <li>
1.288 matthieu 728: <a name="34"></a>
1.261 david 729:
1.294 david 730: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 731: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 732: in <a href="anoncvs.html">OpenBSD current</a>. The
733: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
734: you should update your machine.
1.261 david 735: <p>
736: <ul>
1.302 markus 737: <li><a href="errata34.html#pfkey">Dec 14, 2004:
738: On systems running isakmpd(8) it is possible for a local
739: user to cause kernel memory corruption and system panic by
1.303 markus 740: setting ipsec(4) credentials on a socket.</a>
1.298 brad 741: <li><a href="errata34.html#xpm">Sep 16, 2004:
742: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 743: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
744: httpd(8)'s mod_rewrite module can be made to write one zero byte in
745: an arbitrary memory position outside of a char array, causing a DoS
746: or possibly buffer overflows.</a>
1.294 david 747: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 748: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 749: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 750: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 751: an attacker can delete IPsec tunnels at will.</a>
1.294 david 752: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 753: Multiple remote vulnerabilities have been found in the cvs(1)
754: server which can be used by CVS clients to crash or execute
1.293 brad 755: arbitrary code on the server.</a>
1.294 david 756: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 757: kdc(8) performs inadequate checking of request fields, leading
758: to the possibility of principal impersonation from other
759: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 760: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 761: A buffer overflow in the cvs(1) server has been found,
762: which can be used by CVS clients to execute arbitrary code on
763: the server.</a>
1.294 david 764: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 765: Integer overflow problems were found in procfs, allowing
766: reading of arbitrary kernel memory.</a>
1.294 david 767: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 768: Pathname validation problems have been found in cvs(1),
769: allowing clients and servers access to files outside the
770: repository or local CVS tree.</a>
1.294 david 771: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 772: A missing check for a NULL-pointer dereference may allow a
1.281 otto 773: remote attacker to crash applications using OpenSSL.</a>
1.294 david 774: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 775: Defects in the payload validation and processing functions of
776: isakmpd have been discovered. An attacker could send malformed
777: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 778: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 779: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
780: access module, using IP addresses without a netmask on big endian
781: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 782: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 783: An IPv6 MTU handling problem exists that could be used by an
784: attacker to cause a denial of service attack.</a>
1.294 david 785: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 786: A reference counting bug in shmat(2) could be used to write to
787: kernel memory under certain circumstances.</a>
1.294 david 788: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 789: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 790: by Thomas Walpuski.</a>
1.294 david 791: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 792: It may be possible for a local user to overrun the stack in
793: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 794: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 795: The use of certain ASN.1 encodings or malformed public keys may
796: allow an attacker to mount a denial of service attack against
797: applications linked with ssl(3).</a>
1.261 david 798: </ul>
799:
800: <li>
1.288 matthieu 801: <a name="33"></a>
1.246 deraadt 802:
1.294 david 803: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 804: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 805: in <a href="anoncvs.html">OpenBSD current</a>. The
806: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 807: you should update your machine.
1.246 deraadt 808: <p>
809: <ul>
1.294 david 810: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 811: Pathname validation problems have been found in cvs(1),
812: allowing clients and servers access to files outside the
813: repository or local CVS tree.</a>
1.294 david 814: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 815: A missing check for a NULL-pointer dereference may allow a
1.281 otto 816: remote attacker to crash applications using OpenSSL.</a>
1.294 david 817: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 818: Defects in the payload validation and processing functions of
819: isakmpd have been discovered. An attacker could send malformed
820: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 821: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 822: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
823: access module, using IP addresses without a netmask on big endian
824: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 825: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 826: An IPv6 MTU handling problem exists that could be used by an
827: attacker to cause a denial of service attack.</a>
1.294 david 828: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 829: A reference counting bug in shmat(2) could be used to write to
830: kernel memory under certain circumstances.</a>
1.294 david 831: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 832: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 833: by Thomas Walpuski.</a>
1.294 david 834: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 835: It may be possible for a local user to execute arbitrary code
836: resulting in escalation of privileges due to a stack overrun
837: in compat_ibcs2(8).</a>
1.294 david 838: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 839: The use of certain ASN.1 encodings or malformed public keys may
840: allow an attacker to mount a denial of service attack against
841: applications linked with ssl(3).</a>
1.294 david 842: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 843: Access of freed memory in pf(4) could be used to
1.260 margarid 844: remotely panic a machine using scrub rules.</a>
1.294 david 845: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 846: A buffer overflow in the address parsing in
847: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 848: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 849: OpenSSH versions prior to 3.7 contains a buffer management error
850: that is potentially exploitable.</a>
1.294 david 851: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 852: Root may be able to reduce the security level by taking advantage of
853: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 854: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 855: An improper bounds check in the kernel may allow a local user
856: to panic the kernel.</a>
1.294 david 857: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 858: An off-by-one error exists in the C library function realpath(3)
859: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 860: </ul>
861:
1.265 miod 862:
1.247 david 863: <p>
1.246 deraadt 864: <li>
1.288 matthieu 865: <a name="32"></a>
1.224 deraadt 866:
1.294 david 867: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 868: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 869: in <a href="anoncvs.html">OpenBSD current</a>. The
870: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 871: you should update your machine.
1.224 deraadt 872: <p>
873: <ul>
1.294 david 874: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 875: The use of certain ASN.1 encodings or malformed public keys may
876: allow an attacker to mount a denial of service attack against
877: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 878: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 879: Access of freed memory in pf(4) could be used to
1.260 margarid 880: remotely panic a machine using scrub rules.</a>
1.294 david 881: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 882: A buffer overflow in the address parsing in
883: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 884: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 885: OpenSSH versions prior to 3.7 contains a buffer management error
886: that is potentially exploitable.</a>
1.294 david 887: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 888: Fix for a potential security issue in
889: sendmail(8) with respect to DNS maps.</a>
1.294 david 890: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 891: An off-by-one error exists in the C library function realpath(3)
892: may allow an attacker to gain escalated privileges.</a>
1.294 david 893: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 894: A buffer overflow in the address parsing in
895: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 896: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 897: A cryptographic weaknesses in the Kerberos v4 protocol can be
898: exploited on Kerberos v5 as well.</a>
1.294 david 899: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 900: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 901: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 902: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 903: Various SSL and TLS operations in OpenSSL are vulnerable to
904: timing attacks.</a>
1.294 david 905: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 906: A buffer overflow in lprm(1) may allow an attacker to elevate
907: privileges to user daemon.</a>.
1.294 david 908: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 909: A buffer overflow in the envelope comments processing in
910: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 911: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 912: httpd(8) leaks file inode numbers via ETag header as well as
913: child PIDs in multipart MIME boundary generation. This could
914: lead, for example, to NFS exploitation because it uses inode
915: numbers as part of the file handle.</a>
1.294 david 916: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 917: In ssl(8) an information leak can occur via timing by performing
918: a MAC computation even if incorrect block cipher padding has
919: been found, this is a countermeasure. Also, check for negative
920: sizes, in allocation routines.</a>
1.294 david 921: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 922: A double free exists in cvs(1) that could lead to privilege
923: escalation for cvs configurations where the cvs command is
1.233 margarid 924: run as a privileged user.</a>
1.294 david 925: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 926: A buffer overflow exists in named(8) that could lead to a
927: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 928: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 929: A logic error in the pool kernel memory allocator could cause
930: memory corruption in low-memory situations, causing the system
931: to crash.</a>
1.294 david 932: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 933: An attacker can bypass smrsh(8)'s restrictions and execute
934: arbitrary commands with the privileges of his own account.</a>
1.294 david 935: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 936: Network bridges running pf with scrubbing enabled could cause
937: mbuf corruption, causing the system to crash.</a>
1.294 david 938: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 939: A buffer overflow can occur in the kadmind(8) daemon, leading
940: to possible remote crash or exploit.</a>
1.224 deraadt 941: </ul>
942:
1.227 miod 943: <p>
944: <li>
1.288 matthieu 945: <a name="31"></a>
1.203 deraadt 946:
1.294 david 947: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 948: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 949: in <a href="anoncvs.html">OpenBSD current</a>. The
950: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 951: you should update your machine.
1.203 deraadt 952:
953: <p>
954: <ul>
1.294 david 955: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 956: A buffer overflow in the address parsing in
957: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 958: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 959: A cryptographic weaknesses in the Kerberos v4 protocol can be
960: exploited on Kerberos v5 as well.</a>
1.294 david 961: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 962: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 963: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 964: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 965: Various SSL and TLS operations in OpenSSL are vulnerable to
966: timing attacks.</a>
1.294 david 967: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 968: A buffer overflow in lprm(1) may allow an attacker to gain
969: root privileges.</a>
1.294 david 970: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 971: A buffer overflow in the envelope comments processing in
972: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 973: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 974: In ssl(8) an information leak can occur via timing by performing
975: a MAC computation even if incorrect block cipher padding has
976: been found, this is a countermeasure. Also, check for negative
977: sizes, in allocation routines.</a>
1.294 david 978: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 979: A double free exists in cvs(1) that could lead to privilege
980: escalation for cvs configurations where the cvs command is
1.294 david 981: run as a privileged user</a>.
982: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 983: A buffer overflow exists in named(8) that could lead to a
984: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 985: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 986: Incorrect argument checking in the getitimer(2) system call
987: may allow an attacker to crash the system.</a>
1.294 david 988: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 989: An attacker can bypass smrsh(8)'s restrictions and execute
990: arbitrary commands with the privileges of his own account.</a>
1.294 david 991: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 992: A buffer overflow can occur in the kadmind(8) daemon, leading
993: to possible remote crash or exploit.</a>
1.294 david 994: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 995: Incorrect argument checking in the setitimer(2) system call
996: may allow an attacker to write to kernel memory.</a>
1.294 david 997: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 998: An insufficient boundary check in the select system call
1.220 miod 999: allows an attacker to overwrite kernel memory and execute arbitrary code
1000: in kernel context.</a>
1.294 david 1001: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1002: Several remote buffer overflows can occur in the SSL2 server and SSL3
1003: client of the ssl(8) library, as in the ASN.1 parser code in the
1004: crypto(3) library, all of them being potentially remotely
1005: exploitable.</a>
1.294 david 1006: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1007: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1008: possible remote crash.</a>
1.294 david 1009: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1010: A race condition exists in the pppd(8) daemon which may cause it to
1011: alter the file permissions of an arbitrary file.</a>
1.294 david 1012: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1013: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1014: crash.</a>
1.294 david 1015: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1016: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1017: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1018: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1019: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1020: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1021: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1022: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1023: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1024: input validation error that can result in an integer overflow and
1025: privilege escalation.</a>
1.294 david 1026: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1027: A buffer overflow can occur during the interpretation of chunked
1028: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1029: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1030: Under certain conditions, on systems using YP with netgroups
1031: in the password database, it is possible that sshd(8) does
1032: ACL checks for the requested user name but uses the password
1033: database entry of a different user for authentication. This
1034: means that denied users might authenticate successfully
1035: while permitted users could be locked out.</a>
1.294 david 1036: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1037: A race condition exists that could defeat the kernel's
1038: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1039: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1040: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1041: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1042: A local user can gain super-user privileges due to a buffer
1043: overflow in sshd(8) if AFS has been configured on the system
1044: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1045: in the sshd_config file.</a>
1.203 deraadt 1046: </ul>
1047:
1.235 miod 1048: <p>
1.203 deraadt 1049: <li>
1.288 matthieu 1050: <a name="30"></a>
1.187 deraadt 1051:
1.294 david 1052: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1053: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1054: in <a href="anoncvs.html">OpenBSD current</a>. The
1055: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1056: you should update your machine.
1.187 deraadt 1057:
1058: <p>
1059: <ul>
1.294 david 1060: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1061: A buffer overflow exists in named(8) that could lead to a
1062: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1063: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1064: Incorrect argument checking in the getitimer(2) system call
1065: may allow an attacker to crash the system.</a>
1.294 david 1066: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1067: An attacker can bypass smrsh(8)'s restrictions and execute
1068: arbitrary commands with the privileges of his own account.</a>
1.294 david 1069: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1070: A buffer overflow can occur in the kadmind(8) daemon, leading
1071: to possible remote crash or exploit.</a>
1.294 david 1072: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1073: Incorrect argument checking in the setitimer(2) system call
1074: may allow an attacker to write to kernel memory.</a>
1.294 david 1075: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1076: An insufficient boundary check in the select and poll system calls
1077: allows an attacker to overwrite kernel memory and execute arbitrary code
1078: in kernel context.</a>
1.294 david 1079: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1080: Several remote buffer overflows can occur in the SSL2 server and SSL3
1081: client of the ssl(8) library, as in the ASN.1 parser code in the
1082: crypto(3) library, all of them being potentially remotely
1083: exploitable.</a>
1.294 david 1084: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1085: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1086: possible remote crash.</a>
1.294 david 1087: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1088: A race condition exists in the pppd(8) daemon which may cause it to
1089: alter the file permissions of an arbitrary file.</a>
1.294 david 1090: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1091: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1092: crash.</a>
1.294 david 1093: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1094: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1095: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1096: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1097: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1098: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1099: input validation error that can result in an integer overflow and
1100: privilege escalation.</a>
1.294 david 1101: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1102: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1103: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1104: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1105: A buffer overflow can occur during the interpretation of chunked
1106: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1107: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1108: A race condition exists that could defeat the kernel's
1109: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1110: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1111: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1112: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1113: A local user can gain super-user privileges due to a buffer
1114: overflow in sshd(8) if AFS has been configured on the system
1115: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1116: in the sshd_config file.</a>
1.294 david 1117: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1118: The mail(1) was interpreting tilde escapes even when invoked
1119: in non-interactive mode. As mail(1) is called as root from cron,
1120: this can lead to a local root compromise.</a>
1.294 david 1121: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1122: Under certain conditions, on systems using YP with netgroups in
1123: the password database, it is possible for the rexecd(8) and rshd(8)
1124: daemons to execute a shell from a password database entry for a
1125: different user. Similarly, atrun(8) may change to the wrong
1126: home directory when running jobs.</a>
1.294 david 1127: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1128: A potential double free() exists in the zlib library;
1129: this is not exploitable on OpenBSD.
1130: The kernel also contains a copy of zlib; it is not
1131: currently known if the kernel zlib is exploitable.</a>
1.294 david 1132: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1133: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1134: may allow a local user to gain super-user privileges.</a>
1.294 david 1135: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1136: A race condition between the ptrace(2) and execve(2) system calls
1137: allows an attacker to modify the memory contents of suid/sgid
1138: processes which could lead to compromise of the super-user account.</a>
1.294 david 1139: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1140: There is a security hole in sudo(8) that can be exploited
1141: when the Postfix sendmail replacement is installed that may
1142: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1143: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1144: An attacker can trick a machine running the lpd daemon into
1145: creating new files in the root directory from a machine with
1146: remote line printer access.</a>
1.294 david 1147: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1148: The vi.recover script can be abused in such a way as
1149: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1150: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1151: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1152: resulting in a crash.</a>
1.294 david 1153: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1154: A security hole that may allow an attacker to partially authenticate
1155: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1156: </ul>
1157:
1158: <p>
1159: <li>
1.288 matthieu 1160: <a name="29"></a>
1.173 deraadt 1161:
1.294 david 1162: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1163: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1164: in <a href="anoncvs.html">OpenBSD current</a>. The
1165: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1166: you should update your machine.
1167:
1.173 deraadt 1168:
1169: <p>
1170: <ul>
1.294 david 1171: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1172: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1173: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1174: A race condition exists that could defeat the kernel's
1175: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1176: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1177: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1178: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1179: A local user can gain super-user privileges due to a buffer
1180: overflow in sshd(8) if AFS has been configured on the system
1181: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1182: in the sshd_config file.</a>
1.294 david 1183: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1184: The mail(1) was interpreting tilde escapes even when invoked
1185: in non-interactive mode. As mail(1) is called as root from cron,
1186: this can lead to a local root compromise.</a>
1.294 david 1187: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1188: A potential double free() exists in the zlib library;
1189: this is not exploitable on OpenBSD.
1190: The kernel also contains a copy of zlib; it is not
1191: currently known if the kernel zlib is exploitable.</a>
1.294 david 1192: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1193: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1194: may allow a local user to gain super-user privileges.</a>
1.294 david 1195: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1196: A race condition between the ptrace(2) and execve(2) system calls
1197: allows an attacker to modify the memory contents of suid/sgid
1198: processes which could lead to compromise of the super-user account.</a>
1.294 david 1199: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1200: There is a security hole in sudo(8) that can be exploited
1201: when the Postfix sendmail replacement is installed that may
1202: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1203: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1204: An attacker can trick a machine running the lpd daemon into
1205: creating new files in the root directory from a machine with
1206: remote line printer access.</a>
1.294 david 1207: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1208: The vi.recover script can be abused in such a way as
1209: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1210: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1211: A security hole exists in uuxqt(8) that may allow an
1212: attacker to gain root privileges.</a>
1.294 david 1213: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1214: A security hole exists in lpd(8) that may allow an
1215: attacker to gain root privileges if lpd is running.</a>
1.294 david 1216: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1217: A security hole exists in sendmail(8) that may allow an
1218: attacker on the local host to gain root privileges.</a>
1.294 david 1219: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1220: A kernel buffer overflow in the NFS code can be used to execute
1221: arbitrary code by users with mount privileges (only root by
1.181 millert 1222: default).</a>
1.294 david 1223: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1224: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1225: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1226: sshd(8) allows users to delete arbitrary files named "cookies"
1227: if X11 forwarding is enabled. X11 forwarding is disabled
1228: by default.</a>
1.294 david 1229: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1230: Programs using the fts routines can be tricked into changing
1231: into the wrong directory.</a>
1.294 david 1232: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1233: Sendmail signal handlers contain unsafe code,
1234: leading to numerous race conditions.</a>
1.173 deraadt 1235: </ul>
1236:
1237: <p>
1238: <li>
1.288 matthieu 1239: <a name="28"></a>
1.152 deraadt 1240:
1.294 david 1241: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1242: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1243: in <a href="anoncvs.html">OpenBSD current</a>. The
1244: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1245: you should update your machine.
1246:
1.152 deraadt 1247:
1248: <p>
1249: <ul>
1.294 david 1250: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1251: A security hole exists in uuxqt(8) that may allow an
1252: attacker to gain root privileges.</a>
1.294 david 1253: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1254: A security hole exists in lpd(8) that may allow an
1255: attacker to gain root privileges if lpd is running.</a>
1.294 david 1256: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1257: A security hole exists in sendmail(8) that may allow an
1258: attacker on the local host to gain root privileges.</a>
1.294 david 1259: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1260: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1261: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1262: Programs using the fts routines can be tricked into changing
1263: into the wrong directory.</a>
1.294 david 1264: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1265: Sendmail signal handlers contain unsafe code,
1266: leading to numerous race conditions.</a>
1.294 david 1267: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1268: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1269: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1270: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1271: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1272: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1273: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1274: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1275: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1276: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1277: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1278: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1279: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1280: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1281: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1282: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1283: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1284: rnd(4) did not use all of its input when written to.</a>
1.294 david 1285: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1286: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1287: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1288: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1289: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1290: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1291: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1292: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1293: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1294: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1295: </ul>
1296:
1297: <p>
1298: <li>
1.288 matthieu 1299: <a name="27"></a>
1.124 deraadt 1300:
1.294 david 1301: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1302: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1303: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1304: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1305:
1306: <p>
1307: <ul>
1.294 david 1308: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1309: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1310: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1311: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1312: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1313: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1314: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1315: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1316: (patch included)</a>
1.294 david 1317: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1318: X11 libraries have 2 potential overflows in xtrans code.
1319: (patch included)</a>
1.294 david 1320: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1321: Apache mod_rewrite and mod_vhost_alias modules could expose files
1322: on the server in certain configurations if used.
1323: (patch included)</a>
1.294 david 1324: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1325: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1326: TERMPATH and TERMCAP environment variables as it should.
1327: (patch included)</a>
1.294 david 1328: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1329: There are printf-style format string bugs in several privileged
1330: programs. (patch included)</a>
1.294 david 1331: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1332: libcurses honored terminal descriptions in the $HOME/.terminfo
1333: directory as well as in the TERMCAP environment variable for
1334: setuid and setgid applications.
1.146 deraadt 1335: (patch included)</a>
1.294 david 1336: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1337: A format string vulnerability exists in talkd(8).
1338: (patch included)</a>
1.294 david 1339: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1340: A format string vulnerability exists in the pw_error() function of the
1341: libutil library, yielding localhost root through chpass(1).
1342: (patch included)</a>
1.294 david 1343: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1344: Bad ESP/AH packets could cause a crash under certain conditions.
1345: (patch included)</a>
1.294 david 1346: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1347: A format string vulnerability (localhost root) exists in xlock(1).
1348: (patch included)</a>
1.294 david 1349: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1350: Various bugs found in X11 libraries have various side effects, almost
1351: completely denial of service in OpenBSD.
1352: (patch included)</a>
1.294 david 1353: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1354: Just like pretty much all the other unix ftp daemons
1355: on the planet, ftpd had a remote root hole in it.
1356: Luckily, ftpd was not enabled by default.
1.137 deraadt 1357: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1358: (patch included)</a>
1.294 david 1359: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1360: Mopd, very rarely used, contained some buffer overflows.
1361: (patch included)</a>
1.294 david 1362: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1363: libedit would check for a <b>.editrc</b> file in the current
1364: directory. Not known to be a real security issue, but a patch
1365: is available anyways.
1366: (patch included)</a>
1.294 david 1367: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1368: A serious bug in dhclient(8) could allow strings from a
1369: malicious dhcp server to be executed in the shell as root.
1370: (patch included)</a>
1.294 david 1371: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1372: A serious bug in isakmpd(8) policy handling wherein
1373: policy verification could be completely bypassed in isakmpd.
1374: (patch included)</a>
1.294 david 1375: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1376: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1377: should not be used, and results in security problems on
1378: other operating systems.</a>
1.294 david 1379: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1380: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1381: (patch included)</a>
1.294 david 1382: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1383: Improper use of ipf <i>keep-state</i> rules can result
1384: in firewall rules being bypassed. (patch included)</a>
1385:
1.124 deraadt 1386: </ul>
1387:
1388: <p>
1389: <li>
1.288 matthieu 1390: <a name="26"></a>
1.119 deraadt 1391:
1.294 david 1392: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1393: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1394: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1395: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1396:
1397: <p>
1398: <ul>
1.294 david 1399: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1400: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1401: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1402: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1403: Improper use of ipf <i>keep-state</i> rules can result
1404: in firewall rules being bypassed. (patch included)</a>
1.294 david 1405: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1406: xlockmore has a bug which a localhost attacker can use to gain
1407: access to the encrypted root password hash (which is normally
1.245 miod 1408: encoded using blowfish</a> (see
1.294 david 1409: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1410: crypt(3)</a>)
1.245 miod 1411: (patch included).
1.294 david 1412: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1413: Systems running with procfs enabled and mounted are
1414: vulnerable to a very tricky exploit. procfs is not
1415: mounted by default.
1416: (patch included).</a>
1.294 david 1417: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1418: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1419: thus exposing the system to a race where the aliases file
1420: did not exist.
1.119 deraadt 1421: (patch included).</a>
1.294 david 1422: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1423: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1424: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1425: A buffer overflow in the RSAREF code included in the
1426: USA version of libssl, is possibly exploitable in
1427: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1428: (patch included).<br></a>
1429: <strong>Update:</strong> Turns out that this was not exploitable
1430: in any of the software included in OpenBSD 2.6.
1.294 david 1431: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1432: Any user could change interface media configurations, resulting in
1433: a localhost denial of service attack.
1.121 deraadt 1434: (patch included).</a>
1.119 deraadt 1435: </ul>
1436:
1437: <p>
1438: <li>
1.288 matthieu 1439: <a name="25"></a>
1.106 deraadt 1440:
1.294 david 1441: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1442: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1443: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1444: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1445:
1.96 deraadt 1446: <p>
1.104 deraadt 1447: <ul>
1.294 david 1448: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1449: In cron(8), make sure argv[] is NULL terminated in the
1450: fake popen() and run sendmail as the user, not as root.
1451: (patch included).</a>
1.294 david 1452: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1453: filesystems had an overrun in their handling of uio_offset
1454: in their readdir() routines. (These filesystems are not
1455: enabled by default). (patch included).</a>
1.294 david 1456: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1457: when we execve() a new process. (patch included).</a>
1.294 david 1458: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1459: been handled by IPsec may be transmitted as cleartext.
1460: PF_KEY SA expirations may leak kernel resources.
1461: (patch included).</a>
1.294 david 1462: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1463: motd re-writing and change the find(1) to use -execdir
1464: (patch included).</a>
1.294 david 1465: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1466: users to chflags(2) or fchflags(2) on character or block devices
1467: which they may currently be the owner of (patch included).</a>
1.294 david 1468: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1469: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1470: </ul>
1471:
1.106 deraadt 1472: <p>
1473: <li>
1.288 matthieu 1474: <a name="24"></a>
1.235 miod 1475:
1.294 david 1476: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1477: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1478: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1479: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1480:
1.96 deraadt 1481: <p>
1.75 deraadt 1482: <ul>
1.294 david 1483: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1484: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1485: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1486: another kernel crash case caused by the <strong>crashme</strong>
1487: program (patch included).</a>
1.294 david 1488: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1489: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1490: (patch included).</a>
1.294 david 1491: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1492: existed in ping(8). (patch included).</a>
1.294 david 1493: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1494: the ipq, which could permit an attacker to cause a crash.
1495: (patch included).</a>
1.294 david 1496: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1497: kernel between accept(2) and select(2) could permit an attacker
1498: to hang sockets from remote.
1499: (patch included).</a>
1.294 david 1500: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1501: bog the machine excessively and cause problems.
1502: (patch included).</a>
1.294 david 1503: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1504: DDB interacted to possibly cause a crash.
1505: (patch included).</a>
1.294 david 1506: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1507: (patch included).</a>
1.294 david 1508: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1509: problem in bootpd(8). (patch included).</a>
1.294 david 1510: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1511: exploitable problem relating to environment variables in termcap
1512: and curses. (patch included).</a>
1.294 david 1513: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1514: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1515: </ul>
1516:
1.106 deraadt 1517: <p>
1518: <li>
1.288 matthieu 1519: <a name="23"></a>
1.235 miod 1520:
1.294 david 1521: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1522: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1523: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1524: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1525:
1.96 deraadt 1526: <p>
1.53 matthieu 1527: <ul>
1.294 david 1528: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1529: problem in bootpd(8). (patch included).</a>
1.294 david 1530: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1531: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1532: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1533: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1534: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1535: chpass(1) has a file descriptor leak which allows an
1536: attacker to modify /etc/master.passwd.</a>
1.294 david 1537: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1538: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1539: should not be executed with fd slots 0, 1, or 2 free.
1540: (patch included).</a>
1.294 david 1541: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1542: libraries (patches included).</a>
1.294 david 1543: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1544: processes too permissive (4th revision patch included).</a>
1.294 david 1545: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1546: of immutable and append-only file flags. (patch included).</a>
1.294 david 1547: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1548: if IPSEC is enabled (patch included).</a>
1.294 david 1549: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1550: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1551: </ul>
1.9 deraadt 1552:
1.106 deraadt 1553: <p>
1554: <li>
1.288 matthieu 1555: <a name="22"></a>
1.235 miod 1556:
1.294 david 1557: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1558: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1559: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1560: still exist in other operating systems. (The supplied patches are for
1561: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1562:
1.96 deraadt 1563: <p>
1.9 deraadt 1564: <ul>
1.294 david 1565: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1566: packets if IPSEC is enabled (patch included).</a>
1.294 david 1567: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1568: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1569: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1570: (patch included).</a>
1.294 david 1571: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1572: (patch included).</a>
1.294 david 1573: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1574: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1575: (patch included).</a>
1.294 david 1576: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1577: export (patch included).</a>
1.112 philen 1578: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1579: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1580: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1581: Acceptance.</a>
1.294 david 1582: A patch is available <a href="errata22.html#sourceroute">here</a>.
1583: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1584: flaw (patch included).</a>
1.294 david 1585: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1586: </ul>
1587:
1.106 deraadt 1588: <p>
1589: <li>
1.288 matthieu 1590: <a name="21"></a>
1.235 miod 1591:
1.294 david 1592: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1593: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1594: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1595: exist in other operating systems. (If you are running OpenBSD 2.1, we
1596: would strongly recommend an upgrade to the newest release, as this
1597: patch list only attempts at fixing the most important security
1598: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1599: security problems. Many of those problems were solved in ways which
1600: make it hard for us to provide patches).
1601:
1.96 deraadt 1602: <p>
1.52 deraadt 1603: <ul>
1.112 philen 1604: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1605: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1606: (patch included)</a>
1.112 philen 1607: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1608: </ul>
1.51 deraadt 1609:
1.106 deraadt 1610: <p>
1611: <li>
1.288 matthieu 1612: <a name="20"></a>
1.235 miod 1613:
1.294 david 1614: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1615: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1616: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1617: exist in other operating systems. (If you are running OpenBSD 2.0, we
1618: commend you for being there back in the old days!, but you're really
1619: missing out if you don't install a new version!)
1620:
1621: <p>
1622: <ul>
1.112 philen 1623: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1624: resolver (patch included)</a>
1625: <li>Many others... if people can hunt them down, please let me know
1626: and we'll put them up here.
1627: </ul>
1.51 deraadt 1628: <p>
1.106 deraadt 1629:
1.288 matthieu 1630: <a name="watching"></a>
1.294 david 1631: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1632:
1.21 deraadt 1633: Since we take a proactive stance with security, we are continually
1634: finding and fixing new security problems. Not all of these problems
1.80 espie 1635: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1636: confirmed to be exploitable; many simple bugs we fix do turn out to
1637: have security consequences we could not predict. We do not have the
1638: time resources to make these changes available in the above format.<p>
1.21 deraadt 1639:
1640: Thus there are usually minor security fixes in the current source code
1641: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1642: guarantee that these problems are of minimal impact and unproven
1.44 ian 1643: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1644: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1645:
1.45 deraadt 1646: People who are really concerned with security can do a number of
1647: things:<p>
1.21 deraadt 1648:
1649: <ul>
1650: <li>If you understand security issues, watch our
1.294 david 1651: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1652: eye out for things which appear security related. Since
1.21 deraadt 1653: exploitability is not proven for many of the fixes we make,
1654: do not expect the relevant commit message to say "SECURITY FIX!".
1655: If a problem is proven and serious, a patch will be available
1656: here very shortly after.
1.161 horacio 1657: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1658: security-announce mailing list</a> which will notify you for every
1.186 ian 1659: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1660: and instruct you on how to patch the problem.
1.21 deraadt 1661: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1662: complete system build from time to time (read /usr/src/Makefile
1663: carefully). Users can make the assumption that the current
1664: source tree always has stronger security than the previous release.
1.45 deraadt 1665: However, building your own system from source code is not trivial;
1.265 miod 1666: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1667: transition between major releases.
1.115 ericj 1668: <li>Install a binary snapshot for your
1.80 espie 1669: architecture, which are made available fairly often. For
1.29 deraadt 1670: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1671: </ul>
1672:
1.9 deraadt 1673: <p>
1.288 matthieu 1674: <a name="reporting"></a>
1.294 david 1675: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1676:
1.5 deraadt 1677: <p> If you find a new security problem, you can mail it to
1.294 david 1678: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1679: <br>
1.5 deraadt 1680: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1681: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1682:
1.107 deraadt 1683: <p>
1.288 matthieu 1684: <a name="papers"></a>
1.294 david 1685: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1686:
1687: A number of papers have been written by OpenBSD team members, about security
1688: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1689: documents are available as follows.<p>
1.107 deraadt 1690:
1691: <ul>
1.113 deraadt 1692: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1693: <a href="events.html#usenix99">Usenix 1999</a>,
1694: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1695: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1696: <a href="papers/bcrypt-paper.ps">paper</a> and
1697: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1698: <p>
1699: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1700: <a href="events.html#usenix99">Usenix 1999</a>,
1701: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1702: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1703: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1704: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1705: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1706: <a href="papers/crypt-paper.ps">paper</a> and
1707: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1708: <p>
1709: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1710: <a href="events.html#usenix99">Usenix 1999</a>,
1711: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1712: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1713: <a href="papers/strlcpy-paper.ps">paper</a> and
1714: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1715: <p>
1.118 deraadt 1716: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1717: <a href="events.html#lisa99">LISA 1999</a>,
1718: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1719: <a href="papers/authgw-paper.ps">paper</a> and
1720: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1721: <p>
1.153 jufi 1722: <li>Encrypting Virtual Memory<br>
1.294 david 1723: <a href="events.html#sec2000">Usenix Security 2000</a>,
1724: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1725: <a href="papers/swapencrypt.ps">paper</a> and
1726: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1727: <p>
1.107 deraadt 1728: </ul>
1.294 david 1729: </ul>
1.106 deraadt 1730:
1.2 deraadt 1731: <hr>
1.294 david 1732: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1733: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1734: <br>
1.375 ! miod 1735: <small>$OpenBSD: security.html,v 1.374 2009/04/11 23:46:45 sthen Exp $</small>
1.1 deraadt 1736:
1.24 deraadt 1737: </body>
1738: </html>