Annotation of www/security.html, Revision 1.385
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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.365 deraadt 57: <br>
1.280 david 58: <a href="#34">3.4</a>,
1.301 miod 59: <a href="#35">3.5</a>,
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 deraadt 67: <a href="#43">4.3</a>,
1.377 tobias 68: <a href="#44">4.4</a>,
1.378 jasper 69: <a href="#45">4.5</a>,
1.385 ! jasper 70: <a href="#46">4.6</a>,
! 71: <a href="#47">4.7</a>.
1.114 philen 72: </td>
73: </tr>
74: </table>
1.56 deraadt 75: <hr>
76:
1.294 david 77: <a name="goals"></a>
1.278 deraadt 78: <ul>
1.294 david 79: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 80:
1.14 deraadt 81: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 82: ONE in the industry for security (if we are not already there). Our
83: open software development model permits us to take a more
84: uncompromising view towards increased security than Sun, SGI, IBM, HP,
85: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 86: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 87: cryptography</a>, we are able to take cryptographic approaches towards
88: fixing security problems.<p>
1.18 deraadt 89:
1.288 matthieu 90: <a name="disclosure"></a>
1.294 david 91: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 92:
1.45 deraadt 93: Like many readers of the
1.196 jufi 94: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 95: BUGTRAQ mailing list</a>,
1.106 deraadt 96: we believe in full disclosure of security problems. In the
97: operating system arena, we were probably the first to embrace
98: the concept. Many vendors, even of free software, still try
99: to hide issues from their users.<p>
100:
101: Security information moves very fast in cracker circles. On the other
102: hand, our experience is that coding and releasing of proper security
103: fixes typically requires about an hour of work -- very fast fix
104: turnaround is possible. Thus we think that full disclosure helps the
105: people who really care about security.<p>
106:
1.288 matthieu 107: <a name="process"></a>
1.294 david 108: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 109:
1.12 deraadt 110: Our security auditing team typically has between six and twelve
1.45 deraadt 111: members who continue to search for and fix new security holes. We
112: have been auditing since the summer of 1996. The process we follow to
113: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 114: every critical software component. We are not so much looking for
115: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 116: years later someone discovers the problem used to be a security
1.106 deraadt 117: issue, and we fixed it because it was just a bug, well, all the
118: better. Flaws have been found in just about every area of the system.
119: Entire new classes of security problems have been found during our
120: audit, and often source code which had been audited earlier needs
121: re-auditing with these new flaws in mind. Code often gets audited
122: multiple times, and by multiple people with different auditing
123: skills.<p>
1.12 deraadt 124:
1.94 deraadt 125: Some members of our security auditing team worked for Secure Networks,
126: the company that made the industry's premier network security scanning
127: software package Ballista (Secure Networks got purchased by Network
128: Associates, Ballista got renamed to Cybercop Scanner, and well...)
129: That company did a lot of security research, and thus fit in well
1.106 deraadt 130: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
131: colours since day 1.<p>
1.31 deraadt 132:
1.34 deraadt 133: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 134: In most cases we have found that the determination of exploitability
135: is not an issue. During our ongoing auditing process we find many
136: bugs, and endeavor to fix them even though exploitability is not
137: proven. We fix the bug, and we move on to find other bugs to fix. We
138: have fixed many simple and obvious careless programming errors in code
139: and only months later discovered that the problems were in fact
140: exploitable. (Or, more likely someone on
1.197 jufi 141: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 142: would report that other operating systems were vulnerable to a `newly
143: discovered problem', and then it would be discovered that OpenBSD had
144: been fixed in a previous release). In other cases we have been saved
145: from full exploitability of complex step-by-step attacks because we
146: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 147: managed such a success is the lpd advisory that Secure Networks put out.
148: <p>
1.29 deraadt 149:
1.288 matthieu 150: <a name="newtech"></a>
1.294 david 151: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 152:
153: As we audit source code, we often invent new ways of solving problems.
154: Sometimes these ideas have been used before in some random application
155: written somewhere, but perhaps not taken to the degree that we do.
156: <p>
157:
158: <ul>
159: <li>strlcpy() and strlcat()
160: <li>Memory protection purify
161: <ul>
162: <li>W^X
163: <li>.rodata segment
164: <li>Guard pages
165: <li>Randomized malloc()
166: <li>Randomized mmap()
167: <li>atexit() and stdio protection
168: </ul>
1.295 otto 169: <li>Privilege separation
1.278 deraadt 170: <li>Privilege revocation
171: <li>Chroot jailing
172: <li>New uids
173: <li>ProPolice
174: <li>... and others
175: </ul>
176: <p>
177:
1.294 david 178: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 179:
1.45 deraadt 180: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 181: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 182: commonplace in security forums like
1.197 jufi 183: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 184:
1.45 deraadt 185: The most intense part of our security auditing happened immediately
1.80 espie 186: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 187: over the last third of 1996 and first half of 1997. Thousands (yes,
188: thousands) of security issues were fixed rapidly over this year-long
189: period; bugs like the standard buffer overflows, protocol
190: implementation weaknesses, information gathering, and filesystem
191: races. Hence most of the security problems that we encountered were
192: fixed before our 2.1 release, and then a far smaller number needed
193: fixing for our 2.2 release. We do not find as many problems anymore,
194: it is simply a case of diminishing returns. Recently the security
195: problems we find and fix tend to be significantly more obscure or
196: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 197:
1.35 deraadt 198: <ul>
1.45 deraadt 199: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 200: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 201: to search for more complicated exploits, so we will too.
202: <li>Finding and fixing subtle flaws in complicated software is
203: a lot of fun.
1.35 deraadt 204: </ul>
1.106 deraadt 205: <p>
1.15 deraadt 206:
1.14 deraadt 207: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 208: to find and fix new security flaws.<p>
1.12 deraadt 209:
1.288 matthieu 210: <a name="default"></a>
1.294 david 211: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 212:
213: To ensure that novice users of OpenBSD do not need to become security
214: experts overnight (a viewpoint which other vendors seem to have), we
215: ship the operating system in a Secure by Default mode. All non-essential
216: services are disabled. As the user/administrator becomes more familiar
217: with the system, he will discover that he has to enable daemons and other
218: parts of the system. During the process of learning how to enable a new
219: service, the novice is more likely to learn of security considerations.<p>
220:
221: This is in stark contrast to the increasing number of systems that
222: ship with NFS, mountd, web servers, and various other services enabled
223: by default, creating instantaneous security problems for their users
224: within minutes after their first install.<p>
225:
1.288 matthieu 226: <a name="crypto"></a>
1.294 david 227: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 228:
229: And of course, since the OpenBSD project is based in Canada, it is possible
230: for us to integrate cryptography. For more information, read the page
1.116 deraadt 231: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 232:
1.294 david 233: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 234:
235: <li>
1.385 ! jasper 236: <a name="47"></a>
! 237:
! 238: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
! 239: These are the OpenBSD 4.7 advisories -- all these problems are solved
! 240: in <a href=anoncvs.html>OpenBSD current</a> and the
! 241: <a href=stable.html>patch branch</a>.
! 242:
! 243: <p>
! 244: <ul>
! 245: <li><a href="errata47.html#003_openssl">April 14, 2010:
! 246: In TLS connections, certain incorrectly formatted records can
! 247: cause an OpenSSL client or server to crash due to a read
! 248: attempt at NULL.</a>.
! 249: </ul>
! 250:
! 251: <li>
1.378 jasper 252: <a name="46"></a>
253:
254: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
255: These are the OpenBSD 4.6 advisories -- all these problems are solved
256: in <a href=anoncvs.html>OpenBSD current</a> and the
257: <a href=stable.html>patch branch</a>.
258:
259: <p>
260: <ul>
1.385 ! jasper 261: <li><a href="errata46.html#010_openssl">April 14, 2010:
! 262: In TLS connections, certain incorrectly formatted records can
! 263: cause an OpenSSL client or server to crash due to a read
! 264: attempt at NULL.</a>.
1.384 jasper 265: <li><a href="errata46.html#006_openssl">March 12, 2010:
266: OpenSSL is susceptible to a buffer overflow due to a failure
267: to check for NULL returns from bn_wexpand function calls</a>.
1.383 sthen 268: <li><a href="errata46.html#004_openssl">November 26, 2009:
269: The SSL/TLS protocol is subject to man-in-the-middle attacks
270: related to renegotiation</a>.
1.378 jasper 271: </ul>
1.382 tobias 272:
273: <li>
1.373 djm 274: <a name="45"></a>
275:
276: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
277: These are the OpenBSD 4.5 advisories -- all these problems are solved
278: in <a href=anoncvs.html>OpenBSD current</a> and the
279: <a href=stable.html>patch branch</a>.
280:
281: <p>
282: <ul>
1.385 ! jasper 283: <li><a href="errata45.html#016_openssl">April 14, 2010:
! 284: In TLS connections, certain incorrectly formatted records can
! 285: cause an OpenSSL client or server to crash due to a read
! 286: attempt at NULL.</a>.
! 287: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 288: OpenSSL is susceptible to a buffer overflow due to a failure
289: to check for NULL returns from bn_wexpand function calls</a>.
1.383 sthen 290: <li><a href="errata45.html#010_openssl">November 26, 2009:
291: The SSL/TLS protocol is subject to man-in-the-middle attacks
292: related to renegotiation</a>.
1.373 djm 293: </ul>
294:
1.382 tobias 295: <p>
296: OpenBSD 4.4 and earlier releases are not supported anymore. The following
297: paragraphs only list advisories issued while they were maintained; these
298: releases are likely to be affected by the advisories for more recent releases.
299: <br>
300:
1.373 djm 301: <li>
1.365 deraadt 302: <a name="44"></a>
303:
304: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
305: These are the OpenBSD 4.4 advisories -- all these problems are solved
306: in <a href=anoncvs.html>OpenBSD current</a> and the
307: <a href=stable.html>patch branch</a>.
308:
309: <p>
310: <ul>
1.372 millert 311: <li><a href="errata44.html#011_sudo">February 22, 2009:
312: sudo(8) may allow a user listed in sudoers to run a command
313: as a different user than their access rule specifies when a Unix
314: group is used in the RunAs portion of the rule.</a>
1.370 djm 315: <li><a href="errata44.html#008_bind">January 15, 2009:
316: named(8) suffered from a similar logic error that may allow
317: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 318: <li><a href="errata44.html#007_openssl">January 9, 2009:
319: OpenSSL suffered from some logic errors that allowed bypass
320: of DSA/ECDSA certificate validation.</a>
1.367 brad 321: <li><a href="errata44.html#001_ndp">November 2, 2008:
322: The Neighbor Discovery Protocol (ndp) did not correctly verify
323: neighbor solicitation requests maybe allowing a nearby attacker
324: to intercept traffic.</a>
1.365 deraadt 325: </ul>
326:
327: <li>
1.357 brad 328: <a name="43"></a>
329:
330: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
331: These are the OpenBSD 4.3 advisories -- all these problems are solved
332: in <a href=anoncvs.html>OpenBSD current</a> and the
333: <a href=stable.html>patch branch</a>.
334:
335: <p>
336: <ul>
1.372 millert 337: <li><a href="errata43.html#011_sudo">February 22, 2009:
338: sudo(8) may allow a user listed in sudoers to run a command
339: as a different user than their access rule specifies when a Unix
340: group is used in the RunAs portion of the rule.</a>
1.370 djm 341: <li><a href="errata43.html#008_bind">January 15, 2009:
342: named(8) suffered from a similar logic error that may allow
343: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 344: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 345: OpenSSL suffered from some logic errors that allowed bypass
346: of DSA/ECDSA certificate validation.</a>
1.382 tobias 347: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 348: The Neighbor Discovery Protocol (ndp) did not correctly verify
349: neighbor solicitation requests maybe allowing a nearby attacker
350: to intercept traffic.</a>
1.362 brad 351: <li><a href="errata43.html#004_bind">July 23, 2008:
352: A vulnerability has been found with BIND.</a>
1.361 brad 353: <li><a href="errata43.html#003_xorg">July 15, 2008:
354: Multiple vulnerabilities in X.Org.</a>
1.359 brad 355: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 356: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 357: <li><a href="errata43.html#001_openssh">March 30, 2008:
358: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 359: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 360: </ul>
361:
362: <li>
1.348 merdely 363: <a name="42"></a>
364: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
365: These are the OpenBSD 4.2 advisories -- all these problems are solved
366: in <a href=anoncvs.html>OpenBSD current</a> and the
367: <a href=stable.html>patch branch</a>.
368:
369: <p>
370: <ul>
1.364 tobias 371: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 372: The Neighbor Discovery Protocol (ndp) did not correctly verify
373: neighbor solicitation requests maybe allowing a nearby attacker
374: to intercept traffic.</a>
1.362 brad 375: <li><a href="errata42.html#013_bind">July 23, 2008:
376: A vulnerability has been found with BIND.</a>
1.361 brad 377: <li><a href="errata42.html#012_xorg2">July 15, 2008:
378: Multiple vulnerabilities in X.Org.</a>
1.359 brad 379: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 380: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 381: <li><a href="errata42.html#010_openssh">March 30, 2008:
382: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 383: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 384: <li><a href="errata42.html#009_ppp">March 7, 2008:
385: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 386: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
387: Multiple vulnerabilities in X.Org.</a>
1.351 okan 388: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
389: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 390: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 391: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 392: </ul>
393:
394: <li>
1.346 matthieu 395: <a name="41"></a>
396:
397: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
398: These are the OpenBSD 4.1 advisories -- all these problems are solved
399: in <a href=anoncvs.html>OpenBSD current</a> and the
400: <a href=stable.html>patch branch</a>.
401:
402: <p>
403: <ul>
1.359 brad 404: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 405: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 406: <li><a href="errata41.html#015_openssh">March 30, 2008:
407: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 408: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 409: <li><a href="errata41.html#014_ppp">March 7, 2008:
410: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 411: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
412: Multiple vulnerabilities in X.Org.</a>
413: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
414: The SSL_get_shared_ciphers() function in OpenSSL contains
415: an off-by-one overflow.</a>
1.350 deraadt 416: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 417: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 418: <li><a href="errata41.html#009_file">Jul 9, 2007:
419: Fix possible heap overflow in file(1).</a>
1.346 matthieu 420: <li><a href="errata41.html#005_route6">Apr 27, 2007:
421: IPv6 type 0 route headers can be used to mount a DoS attack
422: against hosts and networks.</a>
423: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
424: Multiple vulnerabilities in X.Org.</a>
425: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
426: Incorrect mbuf handling for ICMP6 packets.</a>
427: </ul>
428:
429: <li>
1.334 brad 430: <a name="40"></a>
431: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
432: These are the OpenBSD 4.0 advisories -- all these problems are solved
433: in <a href=anoncvs.html>OpenBSD current</a> and the
434: <a href=stable.html>patch branch</a>.
435:
436: <p>
437: <ul>
1.382 tobias 438: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
439: The SSL_get_shared_ciphers() function in OpenSSL contains an
440: off-by-one overflow.</a>
1.350 deraadt 441: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 442: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 443: <li><a href="errata40.html#015_file">Jul 9, 2007:
444: Fix possible heap overflow in file(1).</a>
1.343 deraadt 445: <li><a href="errata40.html#012_route6">Apr 23, 2007:
446: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 447: against hosts and networks.</a>
1.342 mbalmer 448: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
449: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 450: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
451: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 452: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 453: Insufficient validation in vga(4) may allow an attacker to gain
454: root privileges on some i386 systems.</a>
1.339 deraadt 455: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 456: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 457: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 458: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
459: found by Chris Evans.</a>
1.339 deraadt 460: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 461: Several problems have been found in OpenSSL.</a>
1.339 deraadt 462: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 463: httpd(8) does not sanitize the Expect header from an HTTP request
464: when it is reflected back in an error message, which might allow
465: cross-site scripting (XSS) style attacks.</a>
466: </ul>
467:
468: <li>
1.321 brad 469: <a name="39"></a>
470:
471: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
472: These are the OpenBSD 3.9 advisories -- all these problems are solved
473: in <a href=anoncvs.html>OpenBSD current</a> and the
474: <a href=stable.html>patch branch</a>.
475:
476: <p>
477: <ul>
1.343 deraadt 478: <li><a href="errata39.html#022_route6">Apr 23, 2007:
479: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 480: against hosts and networks.</a>
1.342 mbalmer 481: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
482: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 483: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
484: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 485: <li><a href="errata39.html#agp">Jan 3, 2007:
486: Insufficient validation in vga(4) may allow an attacker to gain
487: root privileges on some i386 systems.</a>
1.336 brad 488: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 489: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 490: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 491: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 492: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 493: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 494: found by Chris Evans.</a>
1.333 deraadt 495: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 496: Several problems have been found in OpenSSL.</a>
1.333 deraadt 497: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 498: httpd(8) does not sanitize the Expect header from an HTTP request
499: when it is reflected back in an error message, which might allow
500: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 501: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 502: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
503: possible for an attacker to construct an invalid signature which
504: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 505: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 506: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 507: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 508: Due to the failure to correctly validate LCP configuration option
509: lengths, it is possible for an attacker to send LCP packets via an
510: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 511: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 512: A problem in isakmpd(8) caused IPsec to run partly without replay
513: protection.</a>
1.333 deraadt 514: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 515: It is possible to cause the kernel to panic when more than the default
516: number of sempahores have been allocated.</a>
1.333 deraadt 517: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 518: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
519: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
520: option.</a>
1.333 deraadt 521: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 522: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 523: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 524: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
525: overflow.</a>
1.333 deraadt 526: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 527: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 528: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 529: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 530: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 531: A race condition has been reported to exist in the handling by sendmail
532: of asynchronous signals.</a>
533: </ul>
534:
535: <li>
1.318 deraadt 536: <a name="38"></a>
537:
538: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
539: These are the OpenBSD 3.8 advisories -- all these problems are solved
540: in <a href=anoncvs.html>OpenBSD current</a> and the
541: <a href=stable.html>patch branch</a>.
542:
543: <p>
544: <ul>
1.332 brad 545: <li><a href="errata38.html#ssh2">Oct 12, 2006:
546: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 547: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 548: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 549: found by Chris Evans.</a>
550: <li><a href="errata38.html#openssl2">Oct 7, 2006:
551: Several problems have been found in OpenSSL.</a>
552: <li><a href="errata38.html#httpd2">Oct 7, 2006:
553: httpd(8) does not sanitize the Expect header from an HTTP request
554: when it is reflected back in an error message, which might allow
555: cross-site scripting (XSS) style attacks.</a>
1.329 brad 556: <li><a href="errata38.html#openssl">Sep 8, 2006:
557: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
558: possible for an attacker to construct an invalid signature which
559: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 560: <li><a href="errata38.html#bind">Sep 8, 2006:
561: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 562: <li><a href="errata38.html#sppp">Sep 2, 2006:
563: Due to the failure to correctly validate LCP configuration option
564: lengths, it is possible for an attacker to send LCP packets via an
565: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 566: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
567: A problem in isakmpd(8) caused IPsec to run partly without replay
568: protection.</a>
569: <li><a href="errata38.html#sem">Aug 25, 2006:
570: It is possible to cause the kernel to panic when more than the default
571: number of sempahores have been allocated.</a>
572: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
573: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
574: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
575: option.</a>
576: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
577: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 578: <li><a href="errata38.html#httpd">Jul 30, 2006:
579: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
580: overflow.</a>
1.324 brad 581: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
582: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 583: <li><a href="errata38.html#xorg">May 2, 2006:
584: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 585: <li><a href="errata38.html#sendmail">Mar 25, 2006:
586: A race condition has been reported to exist in the handling by sendmail
587: of asynchronous signals.</a>
588: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 589: Josh Bressers has reported a weakness in OpenSSH caused due to the
590: insecure use of the system(3) function in scp(1) when performing copy
591: operations using filenames that are supplied by the user from the
592: command line.</a>
1.321 brad 593: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 594: Do not allow users to trick suid programs into re-opening files via
595: /dev/fd.</a>
1.321 brad 596: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 597: A buffer overflow has been found in the Perl interpreter with the
598: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 599: </ul>
600:
601: <li>
1.312 david 602: <a name="37"></a>
603:
604: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
605: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 606: in <a href="anoncvs.html">OpenBSD current</a>. The
607: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
608: you should update your machine.
1.312 david 609:
610: <p>
611: <ul>
1.322 brad 612: <li><a href="errata37.html#xorg">May 2, 2006:
613: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 614: <li><a href="errata37.html#sendmail">Mar 25, 2006:
615: A race condition has been reported to exist in the handling by sendmail
616: of asynchronous signals.</a>
1.320 brad 617: <li><a href="errata37.html#ssh">Feb 12, 2006:
618: Josh Bressers has reported a weakness in OpenSSH caused due to the
619: insecure use of the system(3) function in scp(1) when performing copy
620: operations using filenames that are supplied by the user from the
621: command line.</a>
1.319 brad 622: <li><a href="errata37.html#fd">Jan 5, 2006:
623: Do not allow users to trick suid programs into re-opening files via
624: /dev/fd.</a>
625: <li><a href="errata37.html#perl">Jan 5, 2006:
626: A buffer overflow has been found in the Perl interpreter with the
627: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 628: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 629: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 630: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 631: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 632: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 633: Fix a race condition in sudo(8) that could allow a user
1.315 millert 634: to run arbitrary commands.</a>
1.318 deraadt 635: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 636: Fix a buffer overflow, memory leaks, and NULL pointer
637: dereference in cvs(1).</a>
1.312 david 638: </ul>
639:
640: <li>
1.301 miod 641: <a name="36"></a>
642:
643: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
644: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 645: in <a href="anoncvs.html">OpenBSD current</a>. The
646: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
647: you should update your machine.
1.301 miod 648:
649: <p>
1.302 markus 650: <ul>
1.317 millert 651: <li><a href="errata36.html#libz2">Jul 21, 2005:
652: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 653: <li><a href="errata36.html#libz">Jul 6, 2005:
654: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 655: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 656: Fix a race condition in sudo(8) that could allow a user
1.315 millert 657: to run arbitrary commands.</a>
1.311 deraadt 658: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 659: Fix a buffer overflow, memory leaks, and NULL pointer
660: dereference in cvs(1).</a>
1.311 deraadt 661: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 662: Due to buffer overflows in telnet(1), a malicious
663: server or man-in-the-middle attack could allow
664: execution of arbitrary code with the privileges of
665: the user invoking telnet(1).</a>
1.311 deraadt 666: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 667: More stringent checking should be done in the copy(9)
668: functions to prevent their misuse.</a>
1.311 deraadt 669: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 670: More stringent checking should be done in the copy(9)
671: functions to prevent their misuse.</a>
1.311 deraadt 672: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 673: httpd(8)'s mod_include module fails to properly validate
674: the length of user supplied tag strings prior to copying
1.305 brad 675: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 676: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 677: On systems running isakmpd(8) it is possible for a local
678: user to cause kernel memory corruption and system panic by
1.303 markus 679: setting ipsec(4) credentials on a socket.</a>
1.302 markus 680: </ul>
1.301 miod 681:
682: <li>
1.288 matthieu 683: <a name="35"></a>
1.279 deraadt 684:
1.294 david 685: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 686: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 687: in <a href="anoncvs.html">OpenBSD current</a>. The
688: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
689: you should update your machine.
1.279 deraadt 690:
691: <p>
692: <ul>
1.310 brad 693: <li><a href="errata35.html#cvs4">Apr 28, 2005:
694: Fix a buffer overflow, memory leaks, and NULL pointer
695: dereference in cvs(1).</a>
1.309 brad 696: <li><a href="errata35.html#telnet">Mar 30, 2005:
697: Due to buffer overflows in telnet(1), a malicious
698: server or man-in-the-middle attack could allow
699: execution of arbitrary code with the privileges of
700: the user invoking telnet(1).</a>
1.308 brad 701: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 702: More stringent checking should be done in the copy(9)
703: functions to prevent their misuse.</a>
1.306 brad 704: <li><a href="errata35.html#locore">Feb 28, 2005:
705: More stringent checking should be done in the copy(9)
706: functions to prevent their misuse.</a>
1.304 brad 707: <li><a href="errata35.html#httpd3">Jan 12, 2005:
708: httpd(8)'s mod_include module fails to properly validate
709: the length of user supplied tag strings prior to copying
1.305 brad 710: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 711: <li><a href="errata35.html#pfkey">Dec 14, 2004:
712: On systems running isakmpd(8) it is possible for a local
713: user to cause kernel memory corruption and system panic by
1.303 markus 714: setting ipsec(4) credentials on a socket.</a>
1.301 miod 715: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 716: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 717: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 718: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 719: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 720: httpd(8)'s mod_rewrite module can be made to write one zero byte in
721: an arbitrary memory position outside of a char array, causing a DoS
722: or possibly buffer overflows.</a>
1.301 miod 723: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 724: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 725: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 726: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 727: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 728: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 729: Multiple remote vulnerabilities have been found in the cvs(1)
730: server which can be used by CVS clients to crash or execute
1.293 brad 731: arbitrary code on the server.</a>
1.301 miod 732: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 733: kdc(8) performs inadequate checking of request fields, leading
734: to the possibility of principal impersonation from other
735: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 736: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 737: xdm(1) ignores the requestPort resource and creates a
1.293 brad 738: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 739: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 740: A buffer overflow in the cvs(1) server has been found,
741: which can be used by CVS clients to execute arbitrary code on
1.293 brad 742: the server.</a>
1.301 miod 743: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 744: Integer overflow problems were found in procfs, allowing
1.293 brad 745: reading of arbitrary kernel memory.</a>
1.301 miod 746: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 747: Pathname validation problems have been found in cvs(1),
748: allowing clients and servers access to files outside the
1.293 brad 749: repository or local CVS tree.</a>
1.279 deraadt 750: </ul>
751:
752: <p>
753: <li>
1.288 matthieu 754: <a name="34"></a>
1.261 david 755:
1.294 david 756: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 757: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 758: in <a href="anoncvs.html">OpenBSD current</a>. The
759: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
760: you should update your machine.
1.261 david 761: <p>
762: <ul>
1.302 markus 763: <li><a href="errata34.html#pfkey">Dec 14, 2004:
764: On systems running isakmpd(8) it is possible for a local
765: user to cause kernel memory corruption and system panic by
1.303 markus 766: setting ipsec(4) credentials on a socket.</a>
1.298 brad 767: <li><a href="errata34.html#xpm">Sep 16, 2004:
768: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 769: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
770: httpd(8)'s mod_rewrite module can be made to write one zero byte in
771: an arbitrary memory position outside of a char array, causing a DoS
772: or possibly buffer overflows.</a>
1.294 david 773: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 774: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 775: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 776: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 777: an attacker can delete IPsec tunnels at will.</a>
1.294 david 778: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 779: Multiple remote vulnerabilities have been found in the cvs(1)
780: server which can be used by CVS clients to crash or execute
1.293 brad 781: arbitrary code on the server.</a>
1.294 david 782: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 783: kdc(8) performs inadequate checking of request fields, leading
784: to the possibility of principal impersonation from other
785: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 786: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 787: A buffer overflow in the cvs(1) server has been found,
788: which can be used by CVS clients to execute arbitrary code on
789: the server.</a>
1.294 david 790: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 791: Integer overflow problems were found in procfs, allowing
792: reading of arbitrary kernel memory.</a>
1.294 david 793: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 794: Pathname validation problems have been found in cvs(1),
795: allowing clients and servers access to files outside the
796: repository or local CVS tree.</a>
1.294 david 797: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 798: A missing check for a NULL-pointer dereference may allow a
1.281 otto 799: remote attacker to crash applications using OpenSSL.</a>
1.294 david 800: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 801: Defects in the payload validation and processing functions of
802: isakmpd have been discovered. An attacker could send malformed
803: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 804: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 805: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
806: access module, using IP addresses without a netmask on big endian
807: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 808: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 809: An IPv6 MTU handling problem exists that could be used by an
810: attacker to cause a denial of service attack.</a>
1.294 david 811: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 812: A reference counting bug in shmat(2) could be used to write to
813: kernel memory under certain circumstances.</a>
1.294 david 814: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 815: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 816: by Thomas Walpuski.</a>
1.294 david 817: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 818: It may be possible for a local user to overrun the stack in
819: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 820: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 821: The use of certain ASN.1 encodings or malformed public keys may
822: allow an attacker to mount a denial of service attack against
823: applications linked with ssl(3).</a>
1.261 david 824: </ul>
825:
826: <li>
1.288 matthieu 827: <a name="33"></a>
1.246 deraadt 828:
1.294 david 829: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 830: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 831: in <a href="anoncvs.html">OpenBSD current</a>. The
832: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 833: you should update your machine.
1.246 deraadt 834: <p>
835: <ul>
1.294 david 836: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 837: Pathname validation problems have been found in cvs(1),
838: allowing clients and servers access to files outside the
839: repository or local CVS tree.</a>
1.294 david 840: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 841: A missing check for a NULL-pointer dereference may allow a
1.281 otto 842: remote attacker to crash applications using OpenSSL.</a>
1.294 david 843: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 844: Defects in the payload validation and processing functions of
845: isakmpd have been discovered. An attacker could send malformed
846: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 847: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 848: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
849: access module, using IP addresses without a netmask on big endian
850: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 851: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 852: An IPv6 MTU handling problem exists that could be used by an
853: attacker to cause a denial of service attack.</a>
1.294 david 854: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 855: A reference counting bug in shmat(2) could be used to write to
856: kernel memory under certain circumstances.</a>
1.294 david 857: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 858: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 859: by Thomas Walpuski.</a>
1.294 david 860: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 861: It may be possible for a local user to execute arbitrary code
862: resulting in escalation of privileges due to a stack overrun
863: in compat_ibcs2(8).</a>
1.294 david 864: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 865: The use of certain ASN.1 encodings or malformed public keys may
866: allow an attacker to mount a denial of service attack against
867: applications linked with ssl(3).</a>
1.294 david 868: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 869: Access of freed memory in pf(4) could be used to
1.260 margarid 870: remotely panic a machine using scrub rules.</a>
1.294 david 871: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 872: A buffer overflow in the address parsing in
873: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 874: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 875: OpenSSH versions prior to 3.7 contains a buffer management error
876: that is potentially exploitable.</a>
1.294 david 877: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 878: Root may be able to reduce the security level by taking advantage of
879: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 880: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 881: An improper bounds check in the kernel may allow a local user
882: to panic the kernel.</a>
1.294 david 883: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 884: An off-by-one error exists in the C library function realpath(3)
885: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 886: </ul>
887:
1.265 miod 888:
1.247 david 889: <p>
1.246 deraadt 890: <li>
1.288 matthieu 891: <a name="32"></a>
1.224 deraadt 892:
1.294 david 893: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 894: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 895: in <a href="anoncvs.html">OpenBSD current</a>. The
896: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 897: you should update your machine.
1.224 deraadt 898: <p>
899: <ul>
1.294 david 900: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 901: The use of certain ASN.1 encodings or malformed public keys may
902: allow an attacker to mount a denial of service attack against
903: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 904: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 905: Access of freed memory in pf(4) could be used to
1.260 margarid 906: remotely panic a machine using scrub rules.</a>
1.294 david 907: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 908: A buffer overflow in the address parsing in
909: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 910: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 911: OpenSSH versions prior to 3.7 contains a buffer management error
912: that is potentially exploitable.</a>
1.294 david 913: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 914: Fix for a potential security issue in
915: sendmail(8) with respect to DNS maps.</a>
1.294 david 916: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 917: An off-by-one error exists in the C library function realpath(3)
918: may allow an attacker to gain escalated privileges.</a>
1.294 david 919: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 920: A buffer overflow in the address parsing in
921: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 922: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 923: A cryptographic weaknesses in the Kerberos v4 protocol can be
924: exploited on Kerberos v5 as well.</a>
1.294 david 925: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 926: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 927: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 928: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 929: Various SSL and TLS operations in OpenSSL are vulnerable to
930: timing attacks.</a>
1.294 david 931: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 932: A buffer overflow in lprm(1) may allow an attacker to elevate
933: privileges to user daemon.</a>.
1.294 david 934: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 935: A buffer overflow in the envelope comments processing in
936: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 937: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 938: httpd(8) leaks file inode numbers via ETag header as well as
939: child PIDs in multipart MIME boundary generation. This could
940: lead, for example, to NFS exploitation because it uses inode
941: numbers as part of the file handle.</a>
1.294 david 942: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 943: In ssl(8) an information leak can occur via timing by performing
944: a MAC computation even if incorrect block cipher padding has
945: been found, this is a countermeasure. Also, check for negative
946: sizes, in allocation routines.</a>
1.294 david 947: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 948: A double free exists in cvs(1) that could lead to privilege
949: escalation for cvs configurations where the cvs command is
1.233 margarid 950: run as a privileged user.</a>
1.294 david 951: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 952: A buffer overflow exists in named(8) that could lead to a
953: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 954: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 955: A logic error in the pool kernel memory allocator could cause
956: memory corruption in low-memory situations, causing the system
957: to crash.</a>
1.294 david 958: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 959: An attacker can bypass smrsh(8)'s restrictions and execute
960: arbitrary commands with the privileges of his own account.</a>
1.294 david 961: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 962: Network bridges running pf with scrubbing enabled could cause
963: mbuf corruption, causing the system to crash.</a>
1.294 david 964: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 965: A buffer overflow can occur in the kadmind(8) daemon, leading
966: to possible remote crash or exploit.</a>
1.224 deraadt 967: </ul>
968:
1.227 miod 969: <p>
970: <li>
1.288 matthieu 971: <a name="31"></a>
1.203 deraadt 972:
1.294 david 973: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 974: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 975: in <a href="anoncvs.html">OpenBSD current</a>. The
976: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 977: you should update your machine.
1.203 deraadt 978:
979: <p>
980: <ul>
1.294 david 981: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 982: A buffer overflow in the address parsing in
983: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 984: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 985: A cryptographic weaknesses in the Kerberos v4 protocol can be
986: exploited on Kerberos v5 as well.</a>
1.294 david 987: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 988: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 989: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 990: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 991: Various SSL and TLS operations in OpenSSL are vulnerable to
992: timing attacks.</a>
1.294 david 993: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 994: A buffer overflow in lprm(1) may allow an attacker to gain
995: root privileges.</a>
1.294 david 996: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 997: A buffer overflow in the envelope comments processing in
998: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 999: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1000: In ssl(8) an information leak can occur via timing by performing
1001: a MAC computation even if incorrect block cipher padding has
1002: been found, this is a countermeasure. Also, check for negative
1003: sizes, in allocation routines.</a>
1.294 david 1004: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1005: A double free exists in cvs(1) that could lead to privilege
1006: escalation for cvs configurations where the cvs command is
1.294 david 1007: run as a privileged user</a>.
1008: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1009: A buffer overflow exists in named(8) that could lead to a
1010: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1011: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1012: Incorrect argument checking in the getitimer(2) system call
1013: may allow an attacker to crash the system.</a>
1.294 david 1014: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1015: An attacker can bypass smrsh(8)'s restrictions and execute
1016: arbitrary commands with the privileges of his own account.</a>
1.294 david 1017: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1018: A buffer overflow can occur in the kadmind(8) daemon, leading
1019: to possible remote crash or exploit.</a>
1.294 david 1020: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1021: Incorrect argument checking in the setitimer(2) system call
1022: may allow an attacker to write to kernel memory.</a>
1.294 david 1023: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1024: An insufficient boundary check in the select system call
1.220 miod 1025: allows an attacker to overwrite kernel memory and execute arbitrary code
1026: in kernel context.</a>
1.294 david 1027: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1028: Several remote buffer overflows can occur in the SSL2 server and SSL3
1029: client of the ssl(8) library, as in the ASN.1 parser code in the
1030: crypto(3) library, all of them being potentially remotely
1031: exploitable.</a>
1.294 david 1032: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1033: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1034: possible remote crash.</a>
1.294 david 1035: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1036: A race condition exists in the pppd(8) daemon which may cause it to
1037: alter the file permissions of an arbitrary file.</a>
1.294 david 1038: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1039: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1040: crash.</a>
1.294 david 1041: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1042: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1043: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1044: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1045: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1046: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1047: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1048: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1049: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1050: input validation error that can result in an integer overflow and
1051: privilege escalation.</a>
1.294 david 1052: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1053: A buffer overflow can occur during the interpretation of chunked
1054: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1055: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1056: Under certain conditions, on systems using YP with netgroups
1057: in the password database, it is possible that sshd(8) does
1058: ACL checks for the requested user name but uses the password
1059: database entry of a different user for authentication. This
1060: means that denied users might authenticate successfully
1061: while permitted users could be locked out.</a>
1.294 david 1062: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1063: A race condition exists that could defeat the kernel's
1064: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1065: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1066: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1067: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1068: A local user can gain super-user privileges due to a buffer
1069: overflow in sshd(8) if AFS has been configured on the system
1070: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1071: in the sshd_config file.</a>
1.203 deraadt 1072: </ul>
1073:
1.235 miod 1074: <p>
1.203 deraadt 1075: <li>
1.288 matthieu 1076: <a name="30"></a>
1.187 deraadt 1077:
1.294 david 1078: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1079: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1080: in <a href="anoncvs.html">OpenBSD current</a>. The
1081: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1082: you should update your machine.
1.187 deraadt 1083:
1084: <p>
1085: <ul>
1.294 david 1086: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1087: A buffer overflow exists in named(8) that could lead to a
1088: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1089: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1090: Incorrect argument checking in the getitimer(2) system call
1091: may allow an attacker to crash the system.</a>
1.294 david 1092: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1093: An attacker can bypass smrsh(8)'s restrictions and execute
1094: arbitrary commands with the privileges of his own account.</a>
1.294 david 1095: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1096: A buffer overflow can occur in the kadmind(8) daemon, leading
1097: to possible remote crash or exploit.</a>
1.294 david 1098: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1099: Incorrect argument checking in the setitimer(2) system call
1100: may allow an attacker to write to kernel memory.</a>
1.294 david 1101: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1102: An insufficient boundary check in the select and poll system calls
1103: allows an attacker to overwrite kernel memory and execute arbitrary code
1104: in kernel context.</a>
1.294 david 1105: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1106: Several remote buffer overflows can occur in the SSL2 server and SSL3
1107: client of the ssl(8) library, as in the ASN.1 parser code in the
1108: crypto(3) library, all of them being potentially remotely
1109: exploitable.</a>
1.294 david 1110: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1111: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1112: possible remote crash.</a>
1.294 david 1113: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1114: A race condition exists in the pppd(8) daemon which may cause it to
1115: alter the file permissions of an arbitrary file.</a>
1.294 david 1116: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1117: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1118: crash.</a>
1.294 david 1119: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1120: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1121: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1122: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1123: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1124: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1125: input validation error that can result in an integer overflow and
1126: privilege escalation.</a>
1.294 david 1127: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1128: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1129: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1130: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1131: A buffer overflow can occur during the interpretation of chunked
1132: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1133: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1134: A race condition exists that could defeat the kernel's
1135: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1136: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1137: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1138: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1139: A local user can gain super-user privileges due to a buffer
1140: overflow in sshd(8) if AFS has been configured on the system
1141: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1142: in the sshd_config file.</a>
1.294 david 1143: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1144: The mail(1) was interpreting tilde escapes even when invoked
1145: in non-interactive mode. As mail(1) is called as root from cron,
1146: this can lead to a local root compromise.</a>
1.294 david 1147: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1148: Under certain conditions, on systems using YP with netgroups in
1149: the password database, it is possible for the rexecd(8) and rshd(8)
1150: daemons to execute a shell from a password database entry for a
1151: different user. Similarly, atrun(8) may change to the wrong
1152: home directory when running jobs.</a>
1.294 david 1153: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1154: A potential double free() exists in the zlib library;
1155: this is not exploitable on OpenBSD.
1156: The kernel also contains a copy of zlib; it is not
1157: currently known if the kernel zlib is exploitable.</a>
1.294 david 1158: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1159: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1160: may allow a local user to gain super-user privileges.</a>
1.294 david 1161: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1162: A race condition between the ptrace(2) and execve(2) system calls
1163: allows an attacker to modify the memory contents of suid/sgid
1164: processes which could lead to compromise of the super-user account.</a>
1.294 david 1165: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1166: There is a security hole in sudo(8) that can be exploited
1167: when the Postfix sendmail replacement is installed that may
1168: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1169: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1170: An attacker can trick a machine running the lpd daemon into
1171: creating new files in the root directory from a machine with
1172: remote line printer access.</a>
1.294 david 1173: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1174: The vi.recover script can be abused in such a way as
1175: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1176: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1177: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1178: resulting in a crash.</a>
1.294 david 1179: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1180: A security hole that may allow an attacker to partially authenticate
1181: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1182: </ul>
1183:
1184: <p>
1185: <li>
1.288 matthieu 1186: <a name="29"></a>
1.173 deraadt 1187:
1.294 david 1188: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1189: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1190: in <a href="anoncvs.html">OpenBSD current</a>. The
1191: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1192: you should update your machine.
1193:
1.173 deraadt 1194:
1195: <p>
1196: <ul>
1.294 david 1197: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1198: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1199: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1200: A race condition exists that could defeat the kernel's
1201: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1202: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1203: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1204: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1205: A local user can gain super-user privileges due to a buffer
1206: overflow in sshd(8) if AFS has been configured on the system
1207: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1208: in the sshd_config file.</a>
1.294 david 1209: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1210: The mail(1) was interpreting tilde escapes even when invoked
1211: in non-interactive mode. As mail(1) is called as root from cron,
1212: this can lead to a local root compromise.</a>
1.294 david 1213: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1214: A potential double free() exists in the zlib library;
1215: this is not exploitable on OpenBSD.
1216: The kernel also contains a copy of zlib; it is not
1217: currently known if the kernel zlib is exploitable.</a>
1.294 david 1218: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1219: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1220: may allow a local user to gain super-user privileges.</a>
1.294 david 1221: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1222: A race condition between the ptrace(2) and execve(2) system calls
1223: allows an attacker to modify the memory contents of suid/sgid
1224: processes which could lead to compromise of the super-user account.</a>
1.294 david 1225: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1226: There is a security hole in sudo(8) that can be exploited
1227: when the Postfix sendmail replacement is installed that may
1228: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1229: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1230: An attacker can trick a machine running the lpd daemon into
1231: creating new files in the root directory from a machine with
1232: remote line printer access.</a>
1.294 david 1233: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1234: The vi.recover script can be abused in such a way as
1235: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1236: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1237: A security hole exists in uuxqt(8) that may allow an
1238: attacker to gain root privileges.</a>
1.294 david 1239: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1240: A security hole exists in lpd(8) that may allow an
1241: attacker to gain root privileges if lpd is running.</a>
1.294 david 1242: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1243: A security hole exists in sendmail(8) that may allow an
1244: attacker on the local host to gain root privileges.</a>
1.294 david 1245: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1246: A kernel buffer overflow in the NFS code can be used to execute
1247: arbitrary code by users with mount privileges (only root by
1.181 millert 1248: default).</a>
1.294 david 1249: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1250: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1251: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1252: sshd(8) allows users to delete arbitrary files named "cookies"
1253: if X11 forwarding is enabled. X11 forwarding is disabled
1254: by default.</a>
1.294 david 1255: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1256: Programs using the fts routines can be tricked into changing
1257: into the wrong directory.</a>
1.294 david 1258: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1259: Sendmail signal handlers contain unsafe code,
1260: leading to numerous race conditions.</a>
1.173 deraadt 1261: </ul>
1262:
1263: <p>
1264: <li>
1.288 matthieu 1265: <a name="28"></a>
1.152 deraadt 1266:
1.294 david 1267: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1268: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1269: in <a href="anoncvs.html">OpenBSD current</a>. The
1270: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1271: you should update your machine.
1272:
1.152 deraadt 1273:
1274: <p>
1275: <ul>
1.294 david 1276: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1277: A security hole exists in uuxqt(8) that may allow an
1278: attacker to gain root privileges.</a>
1.294 david 1279: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1280: A security hole exists in lpd(8) that may allow an
1281: attacker to gain root privileges if lpd is running.</a>
1.294 david 1282: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1283: A security hole exists in sendmail(8) that may allow an
1284: attacker on the local host to gain root privileges.</a>
1.294 david 1285: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1286: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1287: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1288: Programs using the fts routines can be tricked into changing
1289: into the wrong directory.</a>
1.294 david 1290: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1291: Sendmail signal handlers contain unsafe code,
1292: leading to numerous race conditions.</a>
1.294 david 1293: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1294: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1295: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1296: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1297: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1298: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1299: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1300: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1301: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1302: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1303: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1304: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1305: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1306: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1307: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1308: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1309: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1310: rnd(4) did not use all of its input when written to.</a>
1.294 david 1311: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1312: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1313: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1314: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1315: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1316: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1317: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1318: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1319: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1320: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1321: </ul>
1322:
1323: <p>
1324: <li>
1.288 matthieu 1325: <a name="27"></a>
1.124 deraadt 1326:
1.294 david 1327: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1328: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1329: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1330: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1331:
1332: <p>
1333: <ul>
1.294 david 1334: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1335: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1336: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1337: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1338: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1339: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1340: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1341: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1342: (patch included)</a>
1.294 david 1343: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1344: X11 libraries have 2 potential overflows in xtrans code.
1345: (patch included)</a>
1.294 david 1346: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1347: Apache mod_rewrite and mod_vhost_alias modules could expose files
1348: on the server in certain configurations if used.
1349: (patch included)</a>
1.294 david 1350: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1351: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1352: TERMPATH and TERMCAP environment variables as it should.
1353: (patch included)</a>
1.294 david 1354: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1355: There are printf-style format string bugs in several privileged
1356: programs. (patch included)</a>
1.294 david 1357: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1358: libcurses honored terminal descriptions in the $HOME/.terminfo
1359: directory as well as in the TERMCAP environment variable for
1360: setuid and setgid applications.
1.146 deraadt 1361: (patch included)</a>
1.294 david 1362: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1363: A format string vulnerability exists in talkd(8).
1364: (patch included)</a>
1.294 david 1365: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1366: A format string vulnerability exists in the pw_error() function of the
1367: libutil library, yielding localhost root through chpass(1).
1368: (patch included)</a>
1.294 david 1369: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1370: Bad ESP/AH packets could cause a crash under certain conditions.
1371: (patch included)</a>
1.294 david 1372: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1373: A format string vulnerability (localhost root) exists in xlock(1).
1374: (patch included)</a>
1.294 david 1375: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1376: Various bugs found in X11 libraries have various side effects, almost
1377: completely denial of service in OpenBSD.
1378: (patch included)</a>
1.294 david 1379: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1380: Just like pretty much all the other unix ftp daemons
1381: on the planet, ftpd had a remote root hole in it.
1382: Luckily, ftpd was not enabled by default.
1.137 deraadt 1383: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1384: (patch included)</a>
1.294 david 1385: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1386: Mopd, very rarely used, contained some buffer overflows.
1387: (patch included)</a>
1.294 david 1388: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1389: libedit would check for a <b>.editrc</b> file in the current
1390: directory. Not known to be a real security issue, but a patch
1391: is available anyways.
1392: (patch included)</a>
1.294 david 1393: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1394: A serious bug in dhclient(8) could allow strings from a
1395: malicious dhcp server to be executed in the shell as root.
1396: (patch included)</a>
1.294 david 1397: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1398: A serious bug in isakmpd(8) policy handling wherein
1399: policy verification could be completely bypassed in isakmpd.
1400: (patch included)</a>
1.294 david 1401: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1402: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1403: should not be used, and results in security problems on
1404: other operating systems.</a>
1.294 david 1405: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1406: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1407: (patch included)</a>
1.294 david 1408: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1409: Improper use of ipf <i>keep-state</i> rules can result
1410: in firewall rules being bypassed. (patch included)</a>
1411:
1.124 deraadt 1412: </ul>
1413:
1414: <p>
1415: <li>
1.288 matthieu 1416: <a name="26"></a>
1.119 deraadt 1417:
1.294 david 1418: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1419: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1420: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1421: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1422:
1423: <p>
1424: <ul>
1.294 david 1425: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1426: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1427: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1428: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1429: Improper use of ipf <i>keep-state</i> rules can result
1430: in firewall rules being bypassed. (patch included)</a>
1.294 david 1431: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1432: xlockmore has a bug which a localhost attacker can use to gain
1433: access to the encrypted root password hash (which is normally
1.245 miod 1434: encoded using blowfish</a> (see
1.294 david 1435: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1436: crypt(3)</a>)
1.245 miod 1437: (patch included).
1.294 david 1438: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1439: Systems running with procfs enabled and mounted are
1440: vulnerable to a very tricky exploit. procfs is not
1441: mounted by default.
1442: (patch included).</a>
1.294 david 1443: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1444: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1445: thus exposing the system to a race where the aliases file
1446: did not exist.
1.119 deraadt 1447: (patch included).</a>
1.294 david 1448: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1449: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1450: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1451: A buffer overflow in the RSAREF code included in the
1452: USA version of libssl, is possibly exploitable in
1453: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1454: (patch included).<br></a>
1455: <strong>Update:</strong> Turns out that this was not exploitable
1456: in any of the software included in OpenBSD 2.6.
1.294 david 1457: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1458: Any user could change interface media configurations, resulting in
1459: a localhost denial of service attack.
1.121 deraadt 1460: (patch included).</a>
1.119 deraadt 1461: </ul>
1462:
1463: <p>
1464: <li>
1.288 matthieu 1465: <a name="25"></a>
1.106 deraadt 1466:
1.294 david 1467: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1468: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1469: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1470: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1471:
1.96 deraadt 1472: <p>
1.104 deraadt 1473: <ul>
1.294 david 1474: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1475: In cron(8), make sure argv[] is NULL terminated in the
1476: fake popen() and run sendmail as the user, not as root.
1477: (patch included).</a>
1.294 david 1478: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1479: filesystems had an overrun in their handling of uio_offset
1480: in their readdir() routines. (These filesystems are not
1481: enabled by default). (patch included).</a>
1.294 david 1482: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1483: when we execve() a new process. (patch included).</a>
1.294 david 1484: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1485: been handled by IPsec may be transmitted as cleartext.
1486: PF_KEY SA expirations may leak kernel resources.
1487: (patch included).</a>
1.294 david 1488: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1489: motd re-writing and change the find(1) to use -execdir
1490: (patch included).</a>
1.294 david 1491: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1492: users to chflags(2) or fchflags(2) on character or block devices
1493: which they may currently be the owner of (patch included).</a>
1.294 david 1494: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1495: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1496: </ul>
1497:
1.106 deraadt 1498: <p>
1499: <li>
1.288 matthieu 1500: <a name="24"></a>
1.235 miod 1501:
1.294 david 1502: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1503: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1504: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1505: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1506:
1.96 deraadt 1507: <p>
1.75 deraadt 1508: <ul>
1.294 david 1509: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1510: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1511: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1512: another kernel crash case caused by the <strong>crashme</strong>
1513: program (patch included).</a>
1.294 david 1514: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1515: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1516: (patch included).</a>
1.294 david 1517: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1518: existed in ping(8). (patch included).</a>
1.294 david 1519: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1520: the ipq, which could permit an attacker to cause a crash.
1521: (patch included).</a>
1.294 david 1522: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1523: kernel between accept(2) and select(2) could permit an attacker
1524: to hang sockets from remote.
1525: (patch included).</a>
1.294 david 1526: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1527: bog the machine excessively and cause problems.
1528: (patch included).</a>
1.294 david 1529: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1530: DDB interacted to possibly cause a crash.
1531: (patch included).</a>
1.294 david 1532: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1533: (patch included).</a>
1.294 david 1534: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1535: problem in bootpd(8). (patch included).</a>
1.294 david 1536: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1537: exploitable problem relating to environment variables in termcap
1538: and curses. (patch included).</a>
1.294 david 1539: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1540: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1541: </ul>
1542:
1.106 deraadt 1543: <p>
1544: <li>
1.288 matthieu 1545: <a name="23"></a>
1.235 miod 1546:
1.294 david 1547: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1548: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1549: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1550: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1551:
1.96 deraadt 1552: <p>
1.53 matthieu 1553: <ul>
1.294 david 1554: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1555: problem in bootpd(8). (patch included).</a>
1.294 david 1556: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1557: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1558: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1559: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1560: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1561: chpass(1) has a file descriptor leak which allows an
1562: attacker to modify /etc/master.passwd.</a>
1.294 david 1563: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1564: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1565: should not be executed with fd slots 0, 1, or 2 free.
1566: (patch included).</a>
1.294 david 1567: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1568: libraries (patches included).</a>
1.294 david 1569: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1570: processes too permissive (4th revision patch included).</a>
1.294 david 1571: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1572: of immutable and append-only file flags. (patch included).</a>
1.294 david 1573: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1574: if IPSEC is enabled (patch included).</a>
1.294 david 1575: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1576: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1577: </ul>
1.9 deraadt 1578:
1.106 deraadt 1579: <p>
1580: <li>
1.288 matthieu 1581: <a name="22"></a>
1.235 miod 1582:
1.294 david 1583: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1584: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1585: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1586: still exist in other operating systems. (The supplied patches are for
1587: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1588:
1.96 deraadt 1589: <p>
1.9 deraadt 1590: <ul>
1.294 david 1591: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1592: packets if IPSEC is enabled (patch included).</a>
1.294 david 1593: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1594: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1595: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1596: (patch included).</a>
1.294 david 1597: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1598: (patch included).</a>
1.294 david 1599: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1600: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1601: (patch included).</a>
1.294 david 1602: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1603: export (patch included).</a>
1.112 philen 1604: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1605: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1606: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1607: Acceptance.</a>
1.294 david 1608: A patch is available <a href="errata22.html#sourceroute">here</a>.
1609: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1610: flaw (patch included).</a>
1.294 david 1611: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1612: </ul>
1613:
1.106 deraadt 1614: <p>
1615: <li>
1.288 matthieu 1616: <a name="21"></a>
1.235 miod 1617:
1.294 david 1618: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1619: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1620: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1621: exist in other operating systems. (If you are running OpenBSD 2.1, we
1622: would strongly recommend an upgrade to the newest release, as this
1623: patch list only attempts at fixing the most important security
1624: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1625: security problems. Many of those problems were solved in ways which
1626: make it hard for us to provide patches).
1627:
1.96 deraadt 1628: <p>
1.52 deraadt 1629: <ul>
1.112 philen 1630: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1631: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1632: (patch included)</a>
1.112 philen 1633: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1634: </ul>
1.51 deraadt 1635:
1.106 deraadt 1636: <p>
1637: <li>
1.288 matthieu 1638: <a name="20"></a>
1.235 miod 1639:
1.294 david 1640: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1641: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1642: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1643: exist in other operating systems. (If you are running OpenBSD 2.0, we
1644: commend you for being there back in the old days!, but you're really
1645: missing out if you don't install a new version!)
1646:
1647: <p>
1648: <ul>
1.112 philen 1649: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1650: resolver (patch included)</a>
1651: <li>Many others... if people can hunt them down, please let me know
1652: and we'll put them up here.
1653: </ul>
1.51 deraadt 1654: <p>
1.106 deraadt 1655:
1.288 matthieu 1656: <a name="watching"></a>
1.294 david 1657: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1658:
1.21 deraadt 1659: Since we take a proactive stance with security, we are continually
1660: finding and fixing new security problems. Not all of these problems
1.80 espie 1661: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1662: confirmed to be exploitable; many simple bugs we fix do turn out to
1663: have security consequences we could not predict. We do not have the
1664: time resources to make these changes available in the above format.<p>
1.21 deraadt 1665:
1666: Thus there are usually minor security fixes in the current source code
1667: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1668: guarantee that these problems are of minimal impact and unproven
1.44 ian 1669: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1670: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1671:
1.45 deraadt 1672: People who are really concerned with security can do a number of
1673: things:<p>
1.21 deraadt 1674:
1675: <ul>
1676: <li>If you understand security issues, watch our
1.294 david 1677: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1678: eye out for things which appear security related. Since
1.21 deraadt 1679: exploitability is not proven for many of the fixes we make,
1680: do not expect the relevant commit message to say "SECURITY FIX!".
1681: If a problem is proven and serious, a patch will be available
1682: here very shortly after.
1.161 horacio 1683: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1684: security-announce mailing list</a> which will notify you for every
1.186 ian 1685: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1686: and instruct you on how to patch the problem.
1.21 deraadt 1687: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1688: complete system build from time to time (read /usr/src/Makefile
1689: carefully). Users can make the assumption that the current
1690: source tree always has stronger security than the previous release.
1.45 deraadt 1691: However, building your own system from source code is not trivial;
1.265 miod 1692: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1693: transition between major releases.
1.115 ericj 1694: <li>Install a binary snapshot for your
1.80 espie 1695: architecture, which are made available fairly often. For
1.29 deraadt 1696: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1697: </ul>
1698:
1.9 deraadt 1699: <p>
1.288 matthieu 1700: <a name="reporting"></a>
1.294 david 1701: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1702:
1.5 deraadt 1703: <p> If you find a new security problem, you can mail it to
1.294 david 1704: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1705: <br>
1.5 deraadt 1706: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1707: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1708:
1.107 deraadt 1709: <p>
1.288 matthieu 1710: <a name="papers"></a>
1.294 david 1711: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1712:
1713: A number of papers have been written by OpenBSD team members, about security
1714: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1715: documents are available as follows.<p>
1.107 deraadt 1716:
1717: <ul>
1.113 deraadt 1718: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1719: <a href="events.html#usenix99">Usenix 1999</a>,
1720: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1721: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1722: <a href="papers/bcrypt-paper.ps">paper</a> and
1723: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1724: <p>
1725: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1726: <a href="events.html#usenix99">Usenix 1999</a>,
1727: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1728: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1729: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1730: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1731: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1732: <a href="papers/crypt-paper.ps">paper</a> and
1733: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1734: <p>
1735: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1736: <a href="events.html#usenix99">Usenix 1999</a>,
1737: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1738: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1739: <a href="papers/strlcpy-paper.ps">paper</a> and
1740: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1741: <p>
1.118 deraadt 1742: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1743: <a href="events.html#lisa99">LISA 1999</a>,
1744: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1745: <a href="papers/authgw-paper.ps">paper</a> and
1746: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1747: <p>
1.153 jufi 1748: <li>Encrypting Virtual Memory<br>
1.294 david 1749: <a href="events.html#sec2000">Usenix Security 2000</a>,
1750: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1751: <a href="papers/swapencrypt.ps">paper</a> and
1752: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1753: <p>
1.107 deraadt 1754: </ul>
1.294 david 1755: </ul>
1.106 deraadt 1756:
1.2 deraadt 1757: <hr>
1.294 david 1758: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1759: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1760: <br>
1.385 ! jasper 1761: <small>$OpenBSD: security.html,v 1.384 2010/03/12 13:36:03 jasper Exp $</small>
1.1 deraadt 1762:
1.24 deraadt 1763: </body>
1764: </html>
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