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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.365 deraadt 57: <br>
1.280 david 58: <a href="#34">3.4</a>,
1.301 miod 59: <a href="#35">3.5</a>,
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 deraadt 67: <a href="#43">4.3</a>,
1.377 tobias 68: <a href="#44">4.4</a>,
1.378 jasper 69: <a href="#45">4.5</a>,
70: <a href="#46">4.6</a>.
1.114 philen 71: </td>
72: </tr>
73: </table>
1.56 deraadt 74: <hr>
75:
1.294 david 76: <a name="goals"></a>
1.278 deraadt 77: <ul>
1.294 david 78: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 79:
1.14 deraadt 80: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 81: ONE in the industry for security (if we are not already there). Our
82: open software development model permits us to take a more
83: uncompromising view towards increased security than Sun, SGI, IBM, HP,
84: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 85: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 86: cryptography</a>, we are able to take cryptographic approaches towards
87: fixing security problems.<p>
1.18 deraadt 88:
1.288 matthieu 89: <a name="disclosure"></a>
1.294 david 90: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 91:
1.45 deraadt 92: Like many readers of the
1.196 jufi 93: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 94: BUGTRAQ mailing list</a>,
1.106 deraadt 95: we believe in full disclosure of security problems. In the
96: operating system arena, we were probably the first to embrace
97: the concept. Many vendors, even of free software, still try
98: to hide issues from their users.<p>
99:
100: Security information moves very fast in cracker circles. On the other
101: hand, our experience is that coding and releasing of proper security
102: fixes typically requires about an hour of work -- very fast fix
103: turnaround is possible. Thus we think that full disclosure helps the
104: people who really care about security.<p>
105:
1.288 matthieu 106: <a name="process"></a>
1.294 david 107: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 108:
1.12 deraadt 109: Our security auditing team typically has between six and twelve
1.45 deraadt 110: members who continue to search for and fix new security holes. We
111: have been auditing since the summer of 1996. The process we follow to
112: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 113: every critical software component. We are not so much looking for
114: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 115: years later someone discovers the problem used to be a security
1.106 deraadt 116: issue, and we fixed it because it was just a bug, well, all the
117: better. Flaws have been found in just about every area of the system.
118: Entire new classes of security problems have been found during our
119: audit, and often source code which had been audited earlier needs
120: re-auditing with these new flaws in mind. Code often gets audited
121: multiple times, and by multiple people with different auditing
122: skills.<p>
1.12 deraadt 123:
1.94 deraadt 124: Some members of our security auditing team worked for Secure Networks,
125: the company that made the industry's premier network security scanning
126: software package Ballista (Secure Networks got purchased by Network
127: Associates, Ballista got renamed to Cybercop Scanner, and well...)
128: That company did a lot of security research, and thus fit in well
1.106 deraadt 129: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
130: colours since day 1.<p>
1.31 deraadt 131:
1.34 deraadt 132: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 133: In most cases we have found that the determination of exploitability
134: is not an issue. During our ongoing auditing process we find many
135: bugs, and endeavor to fix them even though exploitability is not
136: proven. We fix the bug, and we move on to find other bugs to fix. We
137: have fixed many simple and obvious careless programming errors in code
138: and only months later discovered that the problems were in fact
139: exploitable. (Or, more likely someone on
1.197 jufi 140: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 141: would report that other operating systems were vulnerable to a `newly
142: discovered problem', and then it would be discovered that OpenBSD had
143: been fixed in a previous release). In other cases we have been saved
144: from full exploitability of complex step-by-step attacks because we
145: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 146: managed such a success is the lpd advisory that Secure Networks put out.
147: <p>
1.29 deraadt 148:
1.288 matthieu 149: <a name="newtech"></a>
1.294 david 150: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 151:
152: As we audit source code, we often invent new ways of solving problems.
153: Sometimes these ideas have been used before in some random application
154: written somewhere, but perhaps not taken to the degree that we do.
155: <p>
156:
157: <ul>
158: <li>strlcpy() and strlcat()
159: <li>Memory protection purify
160: <ul>
161: <li>W^X
162: <li>.rodata segment
163: <li>Guard pages
164: <li>Randomized malloc()
165: <li>Randomized mmap()
166: <li>atexit() and stdio protection
167: </ul>
1.295 otto 168: <li>Privilege separation
1.278 deraadt 169: <li>Privilege revocation
170: <li>Chroot jailing
171: <li>New uids
172: <li>ProPolice
173: <li>... and others
174: </ul>
175: <p>
176:
1.294 david 177: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 178:
1.45 deraadt 179: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 180: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 181: commonplace in security forums like
1.197 jufi 182: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 183:
1.45 deraadt 184: The most intense part of our security auditing happened immediately
1.80 espie 185: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 186: over the last third of 1996 and first half of 1997. Thousands (yes,
187: thousands) of security issues were fixed rapidly over this year-long
188: period; bugs like the standard buffer overflows, protocol
189: implementation weaknesses, information gathering, and filesystem
190: races. Hence most of the security problems that we encountered were
191: fixed before our 2.1 release, and then a far smaller number needed
192: fixing for our 2.2 release. We do not find as many problems anymore,
193: it is simply a case of diminishing returns. Recently the security
194: problems we find and fix tend to be significantly more obscure or
195: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 196:
1.35 deraadt 197: <ul>
1.45 deraadt 198: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 199: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 200: to search for more complicated exploits, so we will too.
201: <li>Finding and fixing subtle flaws in complicated software is
202: a lot of fun.
1.35 deraadt 203: </ul>
1.106 deraadt 204: <p>
1.15 deraadt 205:
1.14 deraadt 206: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 207: to find and fix new security flaws.<p>
1.12 deraadt 208:
1.288 matthieu 209: <a name="default"></a>
1.294 david 210: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 211:
212: To ensure that novice users of OpenBSD do not need to become security
213: experts overnight (a viewpoint which other vendors seem to have), we
214: ship the operating system in a Secure by Default mode. All non-essential
215: services are disabled. As the user/administrator becomes more familiar
216: with the system, he will discover that he has to enable daemons and other
217: parts of the system. During the process of learning how to enable a new
218: service, the novice is more likely to learn of security considerations.<p>
219:
220: This is in stark contrast to the increasing number of systems that
221: ship with NFS, mountd, web servers, and various other services enabled
222: by default, creating instantaneous security problems for their users
223: within minutes after their first install.<p>
224:
1.288 matthieu 225: <a name="crypto"></a>
1.294 david 226: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 227:
228: And of course, since the OpenBSD project is based in Canada, it is possible
229: for us to integrate cryptography. For more information, read the page
1.116 deraadt 230: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 231:
1.294 david 232: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 233:
234: <li>
1.378 jasper 235: <a name="46"></a>
236:
237: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
238: These are the OpenBSD 4.6 advisories -- all these problems are solved
239: in <a href=anoncvs.html>OpenBSD current</a> and the
240: <a href=stable.html>patch branch</a>.
241:
242: <p>
243: <ul>
1.380 landry 244: <li><a href="errata46.html#003_getsockopt">October 28, 2009:
1.381 ! deraadt 245: getsockopt(2) with any of IP_AUTH_LEVEL, IP_ESP_TRANS_LEVEL,
! 246: IP_ESP_NETWORK_LEVEL, IP_IPCOMP_LEVEL will crash the system.</a>
1.379 sthen 247: <li><a href="errata46.html#002_xmm">October 5, 2009:
248: XMM exceptions are not correctly handled resulting in a kernel panic.</a>
1.378 jasper 249: <li><a href="errata46.html#001_bind">July 29, 2009:
250: BIND's named could be made to crash with a specially crafted
251: dynamic update message to a zone for which the server is
252: master.</a>
253: </ul>
1.373 djm 254: <a name="45"></a>
255:
256: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
257: These are the OpenBSD 4.5 advisories -- all these problems are solved
258: in <a href=anoncvs.html>OpenBSD current</a> and the
259: <a href=stable.html>patch branch</a>.
260:
261: <p>
262: <ul>
1.381 ! deraadt 263: <li><a href="errata45.html#009_getsockopt">October 28, 2009:
! 264: getsockopt(2) with any of IP_AUTH_LEVEL, IP_ESP_TRANS_LEVEL,
! 265: IP_ESP_NETWORK_LEVEL, IP_IPCOMP_LEVEL will crash the system.</a>
! 266: <li><a href="errata45.html#008_xmm">October 5, 2009:
! 267: XMM exceptions are not correctly handled resulting in a kernel panic.</a>
1.378 jasper 268: <li><a href="errata45.html#007_bind">July 29, 2009:
269: BIND's named could be made to crash with a specially crafted
270: dynamic update message to a zone for which the server is
271: master.</a>
1.374 sthen 272: <li><a href="errata45.html#002_pf">April 11, 2009:
273: When pf attempts to perform translation on a specially
274: crafted IP datagram, a null pointer dereference will occur,
275: resulting in a kernel panic.</a>
1.373 djm 276: <li><a href="errata45.html#001_openssl">April 8, 2009:
277: OpenSSL's ASN.1 handling code could be forced to make invalid
278: memory accesses by certain invalid strings or structures, allowing
279: denial-of-service attacks.</a>
280: </ul>
281:
282: <li>
1.365 deraadt 283: <a name="44"></a>
284:
285: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
286: These are the OpenBSD 4.4 advisories -- all these problems are solved
287: in <a href=anoncvs.html>OpenBSD current</a> and the
288: <a href=stable.html>patch branch</a>.
289:
290: <p>
291: <ul>
1.381 ! deraadt 292: <li><a href="errata44.html#016_getsockopt">October 28, 2009:
! 293: getsockopt(2) with any of IP_AUTH_LEVEL, IP_ESP_TRANS_LEVEL,
! 294: IP_ESP_NETWORK_LEVEL, IP_IPCOMP_LEVEL will crash the system.</a>
! 295: <li><a href="errata46.html#015_xmm">October 5, 2009:
! 296: XMM exceptions are not correctly handled resulting in a kernel panic.</a>
1.378 jasper 297: <li><a href="errata44.html#014_bind">July 29, 2009:
298: BIND's named could be made to crash with a specially crafted
299: dynamic update message to a zone for which the server is
300: master.</a>
1.374 sthen 301: <li><a href="errata44.html#013_pf">April 11, 2009:
302: When pf attempts to perform translation on a specially
303: crafted IP datagram, a null pointer dereference will occur,
304: resulting in a kernel panic.</a>
1.373 djm 305: <li><a href="errata44.html#012_openssl">April 8, 2009:
306: OpenSSL's ASN.1 handling code could be forced to make invalid
307: memory accesses by certain invalid strings or structures, allowing
308: denial-of-service attacks.</a>
1.372 millert 309: <li><a href="errata44.html#011_sudo">February 22, 2009:
310: sudo(8) may allow a user listed in sudoers to run a command
311: as a different user than their access rule specifies when a Unix
312: group is used in the RunAs portion of the rule.</a>
1.370 djm 313: <li><a href="errata44.html#008_bind">January 15, 2009:
314: named(8) suffered from a similar logic error that may allow
315: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 316: <li><a href="errata44.html#007_openssl">January 9, 2009:
317: OpenSSL suffered from some logic errors that allowed bypass
318: of DSA/ECDSA certificate validation.</a>
1.367 brad 319: <li><a href="errata44.html#001_ndp">November 2, 2008:
320: The Neighbor Discovery Protocol (ndp) did not correctly verify
321: neighbor solicitation requests maybe allowing a nearby attacker
322: to intercept traffic.</a>
1.365 deraadt 323: </ul>
324:
1.375 miod 325: <p>
326: OpenBSD 4.3 and earlier releases are not supported anymore. The following
327: paragraphs only list advisories issued while they were maintained; these
328: releases are likely to be affected by the advisories for more recent releases.
329: <br>
330:
1.365 deraadt 331: <li>
1.357 brad 332: <a name="43"></a>
333:
334: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
335: These are the OpenBSD 4.3 advisories -- all these problems are solved
336: in <a href=anoncvs.html>OpenBSD current</a> and the
337: <a href=stable.html>patch branch</a>.
338:
339: <p>
340: <ul>
1.374 sthen 341: <li><a href="errata43.html#013_pf">April 11, 2009:
342: When pf attempts to perform translation on a specially
343: crafted IP datagram, a null pointer dereference will occur,
344: resulting in a kernel panic.</a>
1.373 djm 345: <li><a href="errata43.html#012_openssl">April 8, 2009:
346: OpenSSL's ASN.1 handling code could be forced to make invalid
347: memory accesses by certain invalid strings or structures, allowing
348: denial-of-service attacks.</a>
1.372 millert 349: <li><a href="errata43.html#011_sudo">February 22, 2009:
350: sudo(8) may allow a user listed in sudoers to run a command
351: as a different user than their access rule specifies when a Unix
352: group is used in the RunAs portion of the rule.</a>
1.370 djm 353: <li><a href="errata43.html#008_bind">January 15, 2009:
354: named(8) suffered from a similar logic error that may allow
355: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 356: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 357: OpenSSL suffered from some logic errors that allowed bypass
358: of DSA/ECDSA certificate validation.</a>
1.363 brad 359: <li><a href="errata43.html#005_ndp">October 2, 2008:
360: The Neighbor Discovery Protocol (ndp) did not correctly verify
361: neighbor solicitation requests maybe allowing a nearby attacker
362: to intercept traffic.</a>
1.362 brad 363: <li><a href="errata43.html#004_bind">July 23, 2008:
364: A vulnerability has been found with BIND.</a>
1.361 brad 365: <li><a href="errata43.html#003_xorg">July 15, 2008:
366: Multiple vulnerabilities in X.Org.</a>
1.359 brad 367: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 368: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 369: <li><a href="errata43.html#001_openssh">March 30, 2008:
370: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 371: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 372: </ul>
373:
374: <li>
1.348 merdely 375: <a name="42"></a>
376: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
377: These are the OpenBSD 4.2 advisories -- all these problems are solved
378: in <a href=anoncvs.html>OpenBSD current</a> and the
379: <a href=stable.html>patch branch</a>.
380:
381: <p>
382: <ul>
1.364 tobias 383: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 384: The Neighbor Discovery Protocol (ndp) did not correctly verify
385: neighbor solicitation requests maybe allowing a nearby attacker
386: to intercept traffic.</a>
1.362 brad 387: <li><a href="errata42.html#013_bind">July 23, 2008:
388: A vulnerability has been found with BIND.</a>
1.361 brad 389: <li><a href="errata42.html#012_xorg2">July 15, 2008:
390: Multiple vulnerabilities in X.Org.</a>
1.359 brad 391: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 392: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 393: <li><a href="errata42.html#010_openssh">March 30, 2008:
394: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 395: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 396: <li><a href="errata42.html#009_ppp">March 7, 2008:
397: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 398: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
399: Multiple vulnerabilities in X.Org.</a>
1.352 henning 400: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
401: A missing NULL pointer check can lead to a kernel panic.</a>
402: <li><a href="errata42.html#004_pf">Nov 27, 2007:
403: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 404: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
405: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 406: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 407: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 408: </ul>
409:
410: <li>
1.346 matthieu 411: <a name="41"></a>
412:
413: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
414: These are the OpenBSD 4.1 advisories -- all these problems are solved
415: in <a href=anoncvs.html>OpenBSD current</a> and the
416: <a href=stable.html>patch branch</a>.
417:
418: <p>
419: <ul>
1.359 brad 420: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 421: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 422: <li><a href="errata41.html#015_openssh">March 30, 2008:
423: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 424: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 425: <li><a href="errata41.html#014_ppp">March 7, 2008:
426: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 427: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
428: Multiple vulnerabilities in X.Org.</a>
429: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
430: The SSL_get_shared_ciphers() function in OpenSSL contains
431: an off-by-one overflow.</a>
1.350 deraadt 432: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 433: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 434: <li><a href="errata41.html#009_file">Jul 9, 2007:
435: Fix possible heap overflow in file(1).</a>
1.346 matthieu 436: <li><a href="errata41.html#005_route6">Apr 27, 2007:
437: IPv6 type 0 route headers can be used to mount a DoS attack
438: against hosts and networks.</a>
439: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
440: Multiple vulnerabilities in X.Org.</a>
441: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
442: Incorrect mbuf handling for ICMP6 packets.</a>
443: </ul>
444:
445: <li>
1.334 brad 446: <a name="40"></a>
447: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
448: These are the OpenBSD 4.0 advisories -- all these problems are solved
449: in <a href=anoncvs.html>OpenBSD current</a> and the
450: <a href=stable.html>patch branch</a>.
451:
452: <p>
453: <ul>
1.350 deraadt 454: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 455: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 456: <li><a href="errata40.html#015_file">Jul 9, 2007:
457: Fix possible heap overflow in file(1).</a>
1.343 deraadt 458: <li><a href="errata40.html#012_route6">Apr 23, 2007:
459: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 460: against hosts and networks.</a>
1.342 mbalmer 461: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
462: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 463: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
464: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 465: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 466: Insufficient validation in vga(4) may allow an attacker to gain
467: root privileges on some i386 systems.</a>
1.339 deraadt 468: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 469: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 470: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 471: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
472: found by Chris Evans.</a>
1.339 deraadt 473: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 474: Several problems have been found in OpenSSL.</a>
1.339 deraadt 475: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 476: httpd(8) does not sanitize the Expect header from an HTTP request
477: when it is reflected back in an error message, which might allow
478: cross-site scripting (XSS) style attacks.</a>
479: </ul>
480:
481: <li>
1.321 brad 482: <a name="39"></a>
483:
484: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
485: These are the OpenBSD 3.9 advisories -- all these problems are solved
486: in <a href=anoncvs.html>OpenBSD current</a> and the
487: <a href=stable.html>patch branch</a>.
488:
489: <p>
490: <ul>
1.343 deraadt 491: <li><a href="errata39.html#022_route6">Apr 23, 2007:
492: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 493: against hosts and networks.</a>
1.342 mbalmer 494: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
495: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 496: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
497: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 498: <li><a href="errata39.html#agp">Jan 3, 2007:
499: Insufficient validation in vga(4) may allow an attacker to gain
500: root privileges on some i386 systems.</a>
1.336 brad 501: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 502: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 503: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 504: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 505: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 506: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 507: found by Chris Evans.</a>
1.333 deraadt 508: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 509: Several problems have been found in OpenSSL.</a>
1.333 deraadt 510: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 511: httpd(8) does not sanitize the Expect header from an HTTP request
512: when it is reflected back in an error message, which might allow
513: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 514: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 515: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
516: possible for an attacker to construct an invalid signature which
517: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 518: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 519: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 520: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 521: Due to the failure to correctly validate LCP configuration option
522: lengths, it is possible for an attacker to send LCP packets via an
523: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 524: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 525: A problem in isakmpd(8) caused IPsec to run partly without replay
526: protection.</a>
1.333 deraadt 527: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 528: It is possible to cause the kernel to panic when more than the default
529: number of sempahores have been allocated.</a>
1.333 deraadt 530: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 531: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
532: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
533: option.</a>
1.333 deraadt 534: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 535: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 536: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 537: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
538: overflow.</a>
1.333 deraadt 539: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 540: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 541: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 542: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 543: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 544: A race condition has been reported to exist in the handling by sendmail
545: of asynchronous signals.</a>
546: </ul>
547:
548: <li>
1.318 deraadt 549: <a name="38"></a>
550:
551: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
552: These are the OpenBSD 3.8 advisories -- all these problems are solved
553: in <a href=anoncvs.html>OpenBSD current</a> and the
554: <a href=stable.html>patch branch</a>.
555:
556: <p>
557: <ul>
1.332 brad 558: <li><a href="errata38.html#ssh2">Oct 12, 2006:
559: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 560: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 561: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 562: found by Chris Evans.</a>
563: <li><a href="errata38.html#openssl2">Oct 7, 2006:
564: Several problems have been found in OpenSSL.</a>
565: <li><a href="errata38.html#httpd2">Oct 7, 2006:
566: httpd(8) does not sanitize the Expect header from an HTTP request
567: when it is reflected back in an error message, which might allow
568: cross-site scripting (XSS) style attacks.</a>
1.329 brad 569: <li><a href="errata38.html#openssl">Sep 8, 2006:
570: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
571: possible for an attacker to construct an invalid signature which
572: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 573: <li><a href="errata38.html#bind">Sep 8, 2006:
574: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 575: <li><a href="errata38.html#sppp">Sep 2, 2006:
576: Due to the failure to correctly validate LCP configuration option
577: lengths, it is possible for an attacker to send LCP packets via an
578: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 579: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
580: A problem in isakmpd(8) caused IPsec to run partly without replay
581: protection.</a>
582: <li><a href="errata38.html#sem">Aug 25, 2006:
583: It is possible to cause the kernel to panic when more than the default
584: number of sempahores have been allocated.</a>
585: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
586: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
587: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
588: option.</a>
589: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
590: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 591: <li><a href="errata38.html#httpd">Jul 30, 2006:
592: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
593: overflow.</a>
1.324 brad 594: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
595: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 596: <li><a href="errata38.html#xorg">May 2, 2006:
597: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 598: <li><a href="errata38.html#sendmail">Mar 25, 2006:
599: A race condition has been reported to exist in the handling by sendmail
600: of asynchronous signals.</a>
601: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 602: Josh Bressers has reported a weakness in OpenSSH caused due to the
603: insecure use of the system(3) function in scp(1) when performing copy
604: operations using filenames that are supplied by the user from the
605: command line.</a>
1.321 brad 606: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 607: Do not allow users to trick suid programs into re-opening files via
608: /dev/fd.</a>
1.321 brad 609: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 610: A buffer overflow has been found in the Perl interpreter with the
611: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 612: </ul>
613:
614: <li>
1.312 david 615: <a name="37"></a>
616:
617: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
618: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 619: in <a href="anoncvs.html">OpenBSD current</a>. The
620: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
621: you should update your machine.
1.312 david 622:
623: <p>
624: <ul>
1.322 brad 625: <li><a href="errata37.html#xorg">May 2, 2006:
626: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 627: <li><a href="errata37.html#sendmail">Mar 25, 2006:
628: A race condition has been reported to exist in the handling by sendmail
629: of asynchronous signals.</a>
1.320 brad 630: <li><a href="errata37.html#ssh">Feb 12, 2006:
631: Josh Bressers has reported a weakness in OpenSSH caused due to the
632: insecure use of the system(3) function in scp(1) when performing copy
633: operations using filenames that are supplied by the user from the
634: command line.</a>
1.319 brad 635: <li><a href="errata37.html#fd">Jan 5, 2006:
636: Do not allow users to trick suid programs into re-opening files via
637: /dev/fd.</a>
638: <li><a href="errata37.html#perl">Jan 5, 2006:
639: A buffer overflow has been found in the Perl interpreter with the
640: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 641: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 642: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 643: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 644: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 645: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 646: Fix a race condition in sudo(8) that could allow a user
1.315 millert 647: to run arbitrary commands.</a>
1.318 deraadt 648: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 649: Fix a buffer overflow, memory leaks, and NULL pointer
650: dereference in cvs(1).</a>
1.312 david 651: </ul>
652:
653: <li>
1.301 miod 654: <a name="36"></a>
655:
656: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
657: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 658: in <a href="anoncvs.html">OpenBSD current</a>. The
659: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
660: you should update your machine.
1.301 miod 661:
662: <p>
1.302 markus 663: <ul>
1.317 millert 664: <li><a href="errata36.html#libz2">Jul 21, 2005:
665: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 666: <li><a href="errata36.html#libz">Jul 6, 2005:
667: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 668: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 669: Fix a race condition in sudo(8) that could allow a user
1.315 millert 670: to run arbitrary commands.</a>
1.311 deraadt 671: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 672: Fix a buffer overflow, memory leaks, and NULL pointer
673: dereference in cvs(1).</a>
1.311 deraadt 674: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 675: Due to buffer overflows in telnet(1), a malicious
676: server or man-in-the-middle attack could allow
677: execution of arbitrary code with the privileges of
678: the user invoking telnet(1).</a>
1.311 deraadt 679: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 680: More stringent checking should be done in the copy(9)
681: functions to prevent their misuse.</a>
1.311 deraadt 682: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 683: More stringent checking should be done in the copy(9)
684: functions to prevent their misuse.</a>
1.311 deraadt 685: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 686: httpd(8)'s mod_include module fails to properly validate
687: the length of user supplied tag strings prior to copying
1.305 brad 688: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 689: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 690: On systems running isakmpd(8) it is possible for a local
691: user to cause kernel memory corruption and system panic by
1.303 markus 692: setting ipsec(4) credentials on a socket.</a>
1.302 markus 693: </ul>
1.301 miod 694:
695: <li>
1.288 matthieu 696: <a name="35"></a>
1.279 deraadt 697:
1.294 david 698: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 699: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 700: in <a href="anoncvs.html">OpenBSD current</a>. The
701: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
702: you should update your machine.
1.279 deraadt 703:
704: <p>
705: <ul>
1.310 brad 706: <li><a href="errata35.html#cvs4">Apr 28, 2005:
707: Fix a buffer overflow, memory leaks, and NULL pointer
708: dereference in cvs(1).</a>
1.309 brad 709: <li><a href="errata35.html#telnet">Mar 30, 2005:
710: Due to buffer overflows in telnet(1), a malicious
711: server or man-in-the-middle attack could allow
712: execution of arbitrary code with the privileges of
713: the user invoking telnet(1).</a>
1.308 brad 714: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 715: More stringent checking should be done in the copy(9)
716: functions to prevent their misuse.</a>
1.306 brad 717: <li><a href="errata35.html#locore">Feb 28, 2005:
718: More stringent checking should be done in the copy(9)
719: functions to prevent their misuse.</a>
1.304 brad 720: <li><a href="errata35.html#httpd3">Jan 12, 2005:
721: httpd(8)'s mod_include module fails to properly validate
722: the length of user supplied tag strings prior to copying
1.305 brad 723: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 724: <li><a href="errata35.html#pfkey">Dec 14, 2004:
725: On systems running isakmpd(8) it is possible for a local
726: user to cause kernel memory corruption and system panic by
1.303 markus 727: setting ipsec(4) credentials on a socket.</a>
1.301 miod 728: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 729: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 730: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 731: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 732: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 733: httpd(8)'s mod_rewrite module can be made to write one zero byte in
734: an arbitrary memory position outside of a char array, causing a DoS
735: or possibly buffer overflows.</a>
1.301 miod 736: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 737: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 738: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 739: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 740: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 741: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 742: Multiple remote vulnerabilities have been found in the cvs(1)
743: server which can be used by CVS clients to crash or execute
1.293 brad 744: arbitrary code on the server.</a>
1.301 miod 745: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 746: kdc(8) performs inadequate checking of request fields, leading
747: to the possibility of principal impersonation from other
748: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 749: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 750: xdm(1) ignores the requestPort resource and creates a
1.293 brad 751: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 752: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 753: A buffer overflow in the cvs(1) server has been found,
754: which can be used by CVS clients to execute arbitrary code on
1.293 brad 755: the server.</a>
1.301 miod 756: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 757: Integer overflow problems were found in procfs, allowing
1.293 brad 758: reading of arbitrary kernel memory.</a>
1.301 miod 759: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 760: Pathname validation problems have been found in cvs(1),
761: allowing clients and servers access to files outside the
1.293 brad 762: repository or local CVS tree.</a>
1.279 deraadt 763: </ul>
764:
765: <p>
766: <li>
1.288 matthieu 767: <a name="34"></a>
1.261 david 768:
1.294 david 769: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 770: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 771: in <a href="anoncvs.html">OpenBSD current</a>. The
772: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
773: you should update your machine.
1.261 david 774: <p>
775: <ul>
1.302 markus 776: <li><a href="errata34.html#pfkey">Dec 14, 2004:
777: On systems running isakmpd(8) it is possible for a local
778: user to cause kernel memory corruption and system panic by
1.303 markus 779: setting ipsec(4) credentials on a socket.</a>
1.298 brad 780: <li><a href="errata34.html#xpm">Sep 16, 2004:
781: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 782: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
783: httpd(8)'s mod_rewrite module can be made to write one zero byte in
784: an arbitrary memory position outside of a char array, causing a DoS
785: or possibly buffer overflows.</a>
1.294 david 786: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 787: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 788: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 789: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 790: an attacker can delete IPsec tunnels at will.</a>
1.294 david 791: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 792: Multiple remote vulnerabilities have been found in the cvs(1)
793: server which can be used by CVS clients to crash or execute
1.293 brad 794: arbitrary code on the server.</a>
1.294 david 795: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 796: kdc(8) performs inadequate checking of request fields, leading
797: to the possibility of principal impersonation from other
798: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 799: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 800: A buffer overflow in the cvs(1) server has been found,
801: which can be used by CVS clients to execute arbitrary code on
802: the server.</a>
1.294 david 803: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 804: Integer overflow problems were found in procfs, allowing
805: reading of arbitrary kernel memory.</a>
1.294 david 806: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 807: Pathname validation problems have been found in cvs(1),
808: allowing clients and servers access to files outside the
809: repository or local CVS tree.</a>
1.294 david 810: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 811: A missing check for a NULL-pointer dereference may allow a
1.281 otto 812: remote attacker to crash applications using OpenSSL.</a>
1.294 david 813: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 814: Defects in the payload validation and processing functions of
815: isakmpd have been discovered. An attacker could send malformed
816: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 817: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 818: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
819: access module, using IP addresses without a netmask on big endian
820: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 821: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 822: An IPv6 MTU handling problem exists that could be used by an
823: attacker to cause a denial of service attack.</a>
1.294 david 824: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 825: A reference counting bug in shmat(2) could be used to write to
826: kernel memory under certain circumstances.</a>
1.294 david 827: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 828: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 829: by Thomas Walpuski.</a>
1.294 david 830: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 831: It may be possible for a local user to overrun the stack in
832: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 833: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 834: The use of certain ASN.1 encodings or malformed public keys may
835: allow an attacker to mount a denial of service attack against
836: applications linked with ssl(3).</a>
1.261 david 837: </ul>
838:
839: <li>
1.288 matthieu 840: <a name="33"></a>
1.246 deraadt 841:
1.294 david 842: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 843: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 844: in <a href="anoncvs.html">OpenBSD current</a>. The
845: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 846: you should update your machine.
1.246 deraadt 847: <p>
848: <ul>
1.294 david 849: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 850: Pathname validation problems have been found in cvs(1),
851: allowing clients and servers access to files outside the
852: repository or local CVS tree.</a>
1.294 david 853: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 854: A missing check for a NULL-pointer dereference may allow a
1.281 otto 855: remote attacker to crash applications using OpenSSL.</a>
1.294 david 856: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 857: Defects in the payload validation and processing functions of
858: isakmpd have been discovered. An attacker could send malformed
859: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 860: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 861: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
862: access module, using IP addresses without a netmask on big endian
863: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 864: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 865: An IPv6 MTU handling problem exists that could be used by an
866: attacker to cause a denial of service attack.</a>
1.294 david 867: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 868: A reference counting bug in shmat(2) could be used to write to
869: kernel memory under certain circumstances.</a>
1.294 david 870: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 871: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 872: by Thomas Walpuski.</a>
1.294 david 873: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 874: It may be possible for a local user to execute arbitrary code
875: resulting in escalation of privileges due to a stack overrun
876: in compat_ibcs2(8).</a>
1.294 david 877: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 878: The use of certain ASN.1 encodings or malformed public keys may
879: allow an attacker to mount a denial of service attack against
880: applications linked with ssl(3).</a>
1.294 david 881: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 882: Access of freed memory in pf(4) could be used to
1.260 margarid 883: remotely panic a machine using scrub rules.</a>
1.294 david 884: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 885: A buffer overflow in the address parsing in
886: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 887: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 888: OpenSSH versions prior to 3.7 contains a buffer management error
889: that is potentially exploitable.</a>
1.294 david 890: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 891: Root may be able to reduce the security level by taking advantage of
892: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 893: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 894: An improper bounds check in the kernel may allow a local user
895: to panic the kernel.</a>
1.294 david 896: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 897: An off-by-one error exists in the C library function realpath(3)
898: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 899: </ul>
900:
1.265 miod 901:
1.247 david 902: <p>
1.246 deraadt 903: <li>
1.288 matthieu 904: <a name="32"></a>
1.224 deraadt 905:
1.294 david 906: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 907: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 908: in <a href="anoncvs.html">OpenBSD current</a>. The
909: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 910: you should update your machine.
1.224 deraadt 911: <p>
912: <ul>
1.294 david 913: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 914: The use of certain ASN.1 encodings or malformed public keys may
915: allow an attacker to mount a denial of service attack against
916: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 917: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 918: Access of freed memory in pf(4) could be used to
1.260 margarid 919: remotely panic a machine using scrub rules.</a>
1.294 david 920: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 921: A buffer overflow in the address parsing in
922: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 923: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 924: OpenSSH versions prior to 3.7 contains a buffer management error
925: that is potentially exploitable.</a>
1.294 david 926: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 927: Fix for a potential security issue in
928: sendmail(8) with respect to DNS maps.</a>
1.294 david 929: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 930: An off-by-one error exists in the C library function realpath(3)
931: may allow an attacker to gain escalated privileges.</a>
1.294 david 932: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 933: A buffer overflow in the address parsing in
934: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 935: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 936: A cryptographic weaknesses in the Kerberos v4 protocol can be
937: exploited on Kerberos v5 as well.</a>
1.294 david 938: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 939: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 940: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 941: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 942: Various SSL and TLS operations in OpenSSL are vulnerable to
943: timing attacks.</a>
1.294 david 944: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 945: A buffer overflow in lprm(1) may allow an attacker to elevate
946: privileges to user daemon.</a>.
1.294 david 947: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 948: A buffer overflow in the envelope comments processing in
949: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 950: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 951: httpd(8) leaks file inode numbers via ETag header as well as
952: child PIDs in multipart MIME boundary generation. This could
953: lead, for example, to NFS exploitation because it uses inode
954: numbers as part of the file handle.</a>
1.294 david 955: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 956: In ssl(8) an information leak can occur via timing by performing
957: a MAC computation even if incorrect block cipher padding has
958: been found, this is a countermeasure. Also, check for negative
959: sizes, in allocation routines.</a>
1.294 david 960: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 961: A double free exists in cvs(1) that could lead to privilege
962: escalation for cvs configurations where the cvs command is
1.233 margarid 963: run as a privileged user.</a>
1.294 david 964: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 965: A buffer overflow exists in named(8) that could lead to a
966: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 967: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 968: A logic error in the pool kernel memory allocator could cause
969: memory corruption in low-memory situations, causing the system
970: to crash.</a>
1.294 david 971: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 972: An attacker can bypass smrsh(8)'s restrictions and execute
973: arbitrary commands with the privileges of his own account.</a>
1.294 david 974: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 975: Network bridges running pf with scrubbing enabled could cause
976: mbuf corruption, causing the system to crash.</a>
1.294 david 977: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 978: A buffer overflow can occur in the kadmind(8) daemon, leading
979: to possible remote crash or exploit.</a>
1.224 deraadt 980: </ul>
981:
1.227 miod 982: <p>
983: <li>
1.288 matthieu 984: <a name="31"></a>
1.203 deraadt 985:
1.294 david 986: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 987: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 988: in <a href="anoncvs.html">OpenBSD current</a>. The
989: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 990: you should update your machine.
1.203 deraadt 991:
992: <p>
993: <ul>
1.294 david 994: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 995: A buffer overflow in the address parsing in
996: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 997: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 998: A cryptographic weaknesses in the Kerberos v4 protocol can be
999: exploited on Kerberos v5 as well.</a>
1.294 david 1000: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1001: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1002: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1003: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1004: Various SSL and TLS operations in OpenSSL are vulnerable to
1005: timing attacks.</a>
1.294 david 1006: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1007: A buffer overflow in lprm(1) may allow an attacker to gain
1008: root privileges.</a>
1.294 david 1009: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1010: A buffer overflow in the envelope comments processing in
1011: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1012: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1013: In ssl(8) an information leak can occur via timing by performing
1014: a MAC computation even if incorrect block cipher padding has
1015: been found, this is a countermeasure. Also, check for negative
1016: sizes, in allocation routines.</a>
1.294 david 1017: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1018: A double free exists in cvs(1) that could lead to privilege
1019: escalation for cvs configurations where the cvs command is
1.294 david 1020: run as a privileged user</a>.
1021: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1022: A buffer overflow exists in named(8) that could lead to a
1023: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1024: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1025: Incorrect argument checking in the getitimer(2) system call
1026: may allow an attacker to crash the system.</a>
1.294 david 1027: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1028: An attacker can bypass smrsh(8)'s restrictions and execute
1029: arbitrary commands with the privileges of his own account.</a>
1.294 david 1030: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1031: A buffer overflow can occur in the kadmind(8) daemon, leading
1032: to possible remote crash or exploit.</a>
1.294 david 1033: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1034: Incorrect argument checking in the setitimer(2) system call
1035: may allow an attacker to write to kernel memory.</a>
1.294 david 1036: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1037: An insufficient boundary check in the select system call
1.220 miod 1038: allows an attacker to overwrite kernel memory and execute arbitrary code
1039: in kernel context.</a>
1.294 david 1040: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1041: Several remote buffer overflows can occur in the SSL2 server and SSL3
1042: client of the ssl(8) library, as in the ASN.1 parser code in the
1043: crypto(3) library, all of them being potentially remotely
1044: exploitable.</a>
1.294 david 1045: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1046: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1047: possible remote crash.</a>
1.294 david 1048: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1049: A race condition exists in the pppd(8) daemon which may cause it to
1050: alter the file permissions of an arbitrary file.</a>
1.294 david 1051: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1052: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1053: crash.</a>
1.294 david 1054: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1055: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1056: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1057: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1058: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1059: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1060: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1061: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1062: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1063: input validation error that can result in an integer overflow and
1064: privilege escalation.</a>
1.294 david 1065: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1066: A buffer overflow can occur during the interpretation of chunked
1067: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1068: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1069: Under certain conditions, on systems using YP with netgroups
1070: in the password database, it is possible that sshd(8) does
1071: ACL checks for the requested user name but uses the password
1072: database entry of a different user for authentication. This
1073: means that denied users might authenticate successfully
1074: while permitted users could be locked out.</a>
1.294 david 1075: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1076: A race condition exists that could defeat the kernel's
1077: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1078: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1079: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1080: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1081: A local user can gain super-user privileges due to a buffer
1082: overflow in sshd(8) if AFS has been configured on the system
1083: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1084: in the sshd_config file.</a>
1.203 deraadt 1085: </ul>
1086:
1.235 miod 1087: <p>
1.203 deraadt 1088: <li>
1.288 matthieu 1089: <a name="30"></a>
1.187 deraadt 1090:
1.294 david 1091: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1092: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1093: in <a href="anoncvs.html">OpenBSD current</a>. The
1094: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1095: you should update your machine.
1.187 deraadt 1096:
1097: <p>
1098: <ul>
1.294 david 1099: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1100: A buffer overflow exists in named(8) that could lead to a
1101: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1102: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1103: Incorrect argument checking in the getitimer(2) system call
1104: may allow an attacker to crash the system.</a>
1.294 david 1105: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1106: An attacker can bypass smrsh(8)'s restrictions and execute
1107: arbitrary commands with the privileges of his own account.</a>
1.294 david 1108: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1109: A buffer overflow can occur in the kadmind(8) daemon, leading
1110: to possible remote crash or exploit.</a>
1.294 david 1111: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1112: Incorrect argument checking in the setitimer(2) system call
1113: may allow an attacker to write to kernel memory.</a>
1.294 david 1114: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1115: An insufficient boundary check in the select and poll system calls
1116: allows an attacker to overwrite kernel memory and execute arbitrary code
1117: in kernel context.</a>
1.294 david 1118: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1119: Several remote buffer overflows can occur in the SSL2 server and SSL3
1120: client of the ssl(8) library, as in the ASN.1 parser code in the
1121: crypto(3) library, all of them being potentially remotely
1122: exploitable.</a>
1.294 david 1123: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1124: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1125: possible remote crash.</a>
1.294 david 1126: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1127: A race condition exists in the pppd(8) daemon which may cause it to
1128: alter the file permissions of an arbitrary file.</a>
1.294 david 1129: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1130: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1131: crash.</a>
1.294 david 1132: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1133: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1134: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1135: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1136: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1137: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1138: input validation error that can result in an integer overflow and
1139: privilege escalation.</a>
1.294 david 1140: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1141: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1142: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1143: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1144: A buffer overflow can occur during the interpretation of chunked
1145: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1146: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1147: A race condition exists that could defeat the kernel's
1148: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1149: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1150: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1151: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1152: A local user can gain super-user privileges due to a buffer
1153: overflow in sshd(8) if AFS has been configured on the system
1154: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1155: in the sshd_config file.</a>
1.294 david 1156: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1157: The mail(1) was interpreting tilde escapes even when invoked
1158: in non-interactive mode. As mail(1) is called as root from cron,
1159: this can lead to a local root compromise.</a>
1.294 david 1160: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1161: Under certain conditions, on systems using YP with netgroups in
1162: the password database, it is possible for the rexecd(8) and rshd(8)
1163: daemons to execute a shell from a password database entry for a
1164: different user. Similarly, atrun(8) may change to the wrong
1165: home directory when running jobs.</a>
1.294 david 1166: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1167: A potential double free() exists in the zlib library;
1168: this is not exploitable on OpenBSD.
1169: The kernel also contains a copy of zlib; it is not
1170: currently known if the kernel zlib is exploitable.</a>
1.294 david 1171: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1172: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1173: may allow a local user to gain super-user privileges.</a>
1.294 david 1174: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1175: A race condition between the ptrace(2) and execve(2) system calls
1176: allows an attacker to modify the memory contents of suid/sgid
1177: processes which could lead to compromise of the super-user account.</a>
1.294 david 1178: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1179: There is a security hole in sudo(8) that can be exploited
1180: when the Postfix sendmail replacement is installed that may
1181: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1182: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1183: An attacker can trick a machine running the lpd daemon into
1184: creating new files in the root directory from a machine with
1185: remote line printer access.</a>
1.294 david 1186: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1187: The vi.recover script can be abused in such a way as
1188: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1189: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1190: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1191: resulting in a crash.</a>
1.294 david 1192: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1193: A security hole that may allow an attacker to partially authenticate
1194: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1195: </ul>
1196:
1197: <p>
1198: <li>
1.288 matthieu 1199: <a name="29"></a>
1.173 deraadt 1200:
1.294 david 1201: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1202: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1203: in <a href="anoncvs.html">OpenBSD current</a>. The
1204: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1205: you should update your machine.
1206:
1.173 deraadt 1207:
1208: <p>
1209: <ul>
1.294 david 1210: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1211: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1212: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1213: A race condition exists that could defeat the kernel's
1214: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1215: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1216: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1217: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1218: A local user can gain super-user privileges due to a buffer
1219: overflow in sshd(8) if AFS has been configured on the system
1220: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1221: in the sshd_config file.</a>
1.294 david 1222: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1223: The mail(1) was interpreting tilde escapes even when invoked
1224: in non-interactive mode. As mail(1) is called as root from cron,
1225: this can lead to a local root compromise.</a>
1.294 david 1226: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1227: A potential double free() exists in the zlib library;
1228: this is not exploitable on OpenBSD.
1229: The kernel also contains a copy of zlib; it is not
1230: currently known if the kernel zlib is exploitable.</a>
1.294 david 1231: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1232: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1233: may allow a local user to gain super-user privileges.</a>
1.294 david 1234: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1235: A race condition between the ptrace(2) and execve(2) system calls
1236: allows an attacker to modify the memory contents of suid/sgid
1237: processes which could lead to compromise of the super-user account.</a>
1.294 david 1238: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1239: There is a security hole in sudo(8) that can be exploited
1240: when the Postfix sendmail replacement is installed that may
1241: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1242: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1243: An attacker can trick a machine running the lpd daemon into
1244: creating new files in the root directory from a machine with
1245: remote line printer access.</a>
1.294 david 1246: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1247: The vi.recover script can be abused in such a way as
1248: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1249: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1250: A security hole exists in uuxqt(8) that may allow an
1251: attacker to gain root privileges.</a>
1.294 david 1252: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1253: A security hole exists in lpd(8) that may allow an
1254: attacker to gain root privileges if lpd is running.</a>
1.294 david 1255: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1256: A security hole exists in sendmail(8) that may allow an
1257: attacker on the local host to gain root privileges.</a>
1.294 david 1258: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1259: A kernel buffer overflow in the NFS code can be used to execute
1260: arbitrary code by users with mount privileges (only root by
1.181 millert 1261: default).</a>
1.294 david 1262: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1263: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1264: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1265: sshd(8) allows users to delete arbitrary files named "cookies"
1266: if X11 forwarding is enabled. X11 forwarding is disabled
1267: by default.</a>
1.294 david 1268: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1269: Programs using the fts routines can be tricked into changing
1270: into the wrong directory.</a>
1.294 david 1271: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1272: Sendmail signal handlers contain unsafe code,
1273: leading to numerous race conditions.</a>
1.173 deraadt 1274: </ul>
1275:
1276: <p>
1277: <li>
1.288 matthieu 1278: <a name="28"></a>
1.152 deraadt 1279:
1.294 david 1280: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1281: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1282: in <a href="anoncvs.html">OpenBSD current</a>. The
1283: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1284: you should update your machine.
1285:
1.152 deraadt 1286:
1287: <p>
1288: <ul>
1.294 david 1289: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1290: A security hole exists in uuxqt(8) that may allow an
1291: attacker to gain root privileges.</a>
1.294 david 1292: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1293: A security hole exists in lpd(8) that may allow an
1294: attacker to gain root privileges if lpd is running.</a>
1.294 david 1295: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1296: A security hole exists in sendmail(8) that may allow an
1297: attacker on the local host to gain root privileges.</a>
1.294 david 1298: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1299: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1300: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1301: Programs using the fts routines can be tricked into changing
1302: into the wrong directory.</a>
1.294 david 1303: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1304: Sendmail signal handlers contain unsafe code,
1305: leading to numerous race conditions.</a>
1.294 david 1306: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1307: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1308: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1309: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1310: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1311: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1312: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1313: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1314: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1315: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1316: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1317: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1318: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1319: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1320: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1321: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1322: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1323: rnd(4) did not use all of its input when written to.</a>
1.294 david 1324: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1325: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1326: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1327: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1328: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1329: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1330: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1331: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1332: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1333: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1334: </ul>
1335:
1336: <p>
1337: <li>
1.288 matthieu 1338: <a name="27"></a>
1.124 deraadt 1339:
1.294 david 1340: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1341: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1342: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1343: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1344:
1345: <p>
1346: <ul>
1.294 david 1347: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1348: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1349: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1350: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1351: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1352: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1353: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1354: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1355: (patch included)</a>
1.294 david 1356: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1357: X11 libraries have 2 potential overflows in xtrans code.
1358: (patch included)</a>
1.294 david 1359: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1360: Apache mod_rewrite and mod_vhost_alias modules could expose files
1361: on the server in certain configurations if used.
1362: (patch included)</a>
1.294 david 1363: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1364: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1365: TERMPATH and TERMCAP environment variables as it should.
1366: (patch included)</a>
1.294 david 1367: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1368: There are printf-style format string bugs in several privileged
1369: programs. (patch included)</a>
1.294 david 1370: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1371: libcurses honored terminal descriptions in the $HOME/.terminfo
1372: directory as well as in the TERMCAP environment variable for
1373: setuid and setgid applications.
1.146 deraadt 1374: (patch included)</a>
1.294 david 1375: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1376: A format string vulnerability exists in talkd(8).
1377: (patch included)</a>
1.294 david 1378: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1379: A format string vulnerability exists in the pw_error() function of the
1380: libutil library, yielding localhost root through chpass(1).
1381: (patch included)</a>
1.294 david 1382: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1383: Bad ESP/AH packets could cause a crash under certain conditions.
1384: (patch included)</a>
1.294 david 1385: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1386: A format string vulnerability (localhost root) exists in xlock(1).
1387: (patch included)</a>
1.294 david 1388: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1389: Various bugs found in X11 libraries have various side effects, almost
1390: completely denial of service in OpenBSD.
1391: (patch included)</a>
1.294 david 1392: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1393: Just like pretty much all the other unix ftp daemons
1394: on the planet, ftpd had a remote root hole in it.
1395: Luckily, ftpd was not enabled by default.
1.137 deraadt 1396: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1397: (patch included)</a>
1.294 david 1398: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1399: Mopd, very rarely used, contained some buffer overflows.
1400: (patch included)</a>
1.294 david 1401: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1402: libedit would check for a <b>.editrc</b> file in the current
1403: directory. Not known to be a real security issue, but a patch
1404: is available anyways.
1405: (patch included)</a>
1.294 david 1406: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1407: A serious bug in dhclient(8) could allow strings from a
1408: malicious dhcp server to be executed in the shell as root.
1409: (patch included)</a>
1.294 david 1410: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1411: A serious bug in isakmpd(8) policy handling wherein
1412: policy verification could be completely bypassed in isakmpd.
1413: (patch included)</a>
1.294 david 1414: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1415: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1416: should not be used, and results in security problems on
1417: other operating systems.</a>
1.294 david 1418: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1419: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1420: (patch included)</a>
1.294 david 1421: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1422: Improper use of ipf <i>keep-state</i> rules can result
1423: in firewall rules being bypassed. (patch included)</a>
1424:
1.124 deraadt 1425: </ul>
1426:
1427: <p>
1428: <li>
1.288 matthieu 1429: <a name="26"></a>
1.119 deraadt 1430:
1.294 david 1431: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1432: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1433: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1434: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1435:
1436: <p>
1437: <ul>
1.294 david 1438: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1439: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1440: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1441: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1442: Improper use of ipf <i>keep-state</i> rules can result
1443: in firewall rules being bypassed. (patch included)</a>
1.294 david 1444: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1445: xlockmore has a bug which a localhost attacker can use to gain
1446: access to the encrypted root password hash (which is normally
1.245 miod 1447: encoded using blowfish</a> (see
1.294 david 1448: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1449: crypt(3)</a>)
1.245 miod 1450: (patch included).
1.294 david 1451: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1452: Systems running with procfs enabled and mounted are
1453: vulnerable to a very tricky exploit. procfs is not
1454: mounted by default.
1455: (patch included).</a>
1.294 david 1456: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1457: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1458: thus exposing the system to a race where the aliases file
1459: did not exist.
1.119 deraadt 1460: (patch included).</a>
1.294 david 1461: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1462: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1463: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1464: A buffer overflow in the RSAREF code included in the
1465: USA version of libssl, is possibly exploitable in
1466: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1467: (patch included).<br></a>
1468: <strong>Update:</strong> Turns out that this was not exploitable
1469: in any of the software included in OpenBSD 2.6.
1.294 david 1470: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1471: Any user could change interface media configurations, resulting in
1472: a localhost denial of service attack.
1.121 deraadt 1473: (patch included).</a>
1.119 deraadt 1474: </ul>
1475:
1476: <p>
1477: <li>
1.288 matthieu 1478: <a name="25"></a>
1.106 deraadt 1479:
1.294 david 1480: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1481: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1482: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1483: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1484:
1.96 deraadt 1485: <p>
1.104 deraadt 1486: <ul>
1.294 david 1487: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1488: In cron(8), make sure argv[] is NULL terminated in the
1489: fake popen() and run sendmail as the user, not as root.
1490: (patch included).</a>
1.294 david 1491: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1492: filesystems had an overrun in their handling of uio_offset
1493: in their readdir() routines. (These filesystems are not
1494: enabled by default). (patch included).</a>
1.294 david 1495: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1496: when we execve() a new process. (patch included).</a>
1.294 david 1497: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1498: been handled by IPsec may be transmitted as cleartext.
1499: PF_KEY SA expirations may leak kernel resources.
1500: (patch included).</a>
1.294 david 1501: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1502: motd re-writing and change the find(1) to use -execdir
1503: (patch included).</a>
1.294 david 1504: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1505: users to chflags(2) or fchflags(2) on character or block devices
1506: which they may currently be the owner of (patch included).</a>
1.294 david 1507: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1508: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1509: </ul>
1510:
1.106 deraadt 1511: <p>
1512: <li>
1.288 matthieu 1513: <a name="24"></a>
1.235 miod 1514:
1.294 david 1515: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1516: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1517: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1518: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1519:
1.96 deraadt 1520: <p>
1.75 deraadt 1521: <ul>
1.294 david 1522: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1523: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1524: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1525: another kernel crash case caused by the <strong>crashme</strong>
1526: program (patch included).</a>
1.294 david 1527: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1528: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1529: (patch included).</a>
1.294 david 1530: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1531: existed in ping(8). (patch included).</a>
1.294 david 1532: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1533: the ipq, which could permit an attacker to cause a crash.
1534: (patch included).</a>
1.294 david 1535: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1536: kernel between accept(2) and select(2) could permit an attacker
1537: to hang sockets from remote.
1538: (patch included).</a>
1.294 david 1539: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1540: bog the machine excessively and cause problems.
1541: (patch included).</a>
1.294 david 1542: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1543: DDB interacted to possibly cause a crash.
1544: (patch included).</a>
1.294 david 1545: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1546: (patch included).</a>
1.294 david 1547: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1548: problem in bootpd(8). (patch included).</a>
1.294 david 1549: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1550: exploitable problem relating to environment variables in termcap
1551: and curses. (patch included).</a>
1.294 david 1552: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1553: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1554: </ul>
1555:
1.106 deraadt 1556: <p>
1557: <li>
1.288 matthieu 1558: <a name="23"></a>
1.235 miod 1559:
1.294 david 1560: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1561: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1562: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1563: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1564:
1.96 deraadt 1565: <p>
1.53 matthieu 1566: <ul>
1.294 david 1567: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1568: problem in bootpd(8). (patch included).</a>
1.294 david 1569: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1570: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1571: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1572: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1573: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1574: chpass(1) has a file descriptor leak which allows an
1575: attacker to modify /etc/master.passwd.</a>
1.294 david 1576: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1577: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1578: should not be executed with fd slots 0, 1, or 2 free.
1579: (patch included).</a>
1.294 david 1580: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1581: libraries (patches included).</a>
1.294 david 1582: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1583: processes too permissive (4th revision patch included).</a>
1.294 david 1584: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1585: of immutable and append-only file flags. (patch included).</a>
1.294 david 1586: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1587: if IPSEC is enabled (patch included).</a>
1.294 david 1588: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1589: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1590: </ul>
1.9 deraadt 1591:
1.106 deraadt 1592: <p>
1593: <li>
1.288 matthieu 1594: <a name="22"></a>
1.235 miod 1595:
1.294 david 1596: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1597: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1598: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1599: still exist in other operating systems. (The supplied patches are for
1600: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1601:
1.96 deraadt 1602: <p>
1.9 deraadt 1603: <ul>
1.294 david 1604: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1605: packets if IPSEC is enabled (patch included).</a>
1.294 david 1606: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1607: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1608: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1609: (patch included).</a>
1.294 david 1610: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1611: (patch included).</a>
1.294 david 1612: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1613: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1614: (patch included).</a>
1.294 david 1615: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1616: export (patch included).</a>
1.112 philen 1617: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1618: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1619: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1620: Acceptance.</a>
1.294 david 1621: A patch is available <a href="errata22.html#sourceroute">here</a>.
1622: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1623: flaw (patch included).</a>
1.294 david 1624: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1625: </ul>
1626:
1.106 deraadt 1627: <p>
1628: <li>
1.288 matthieu 1629: <a name="21"></a>
1.235 miod 1630:
1.294 david 1631: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1632: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1633: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1634: exist in other operating systems. (If you are running OpenBSD 2.1, we
1635: would strongly recommend an upgrade to the newest release, as this
1636: patch list only attempts at fixing the most important security
1637: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1638: security problems. Many of those problems were solved in ways which
1639: make it hard for us to provide patches).
1640:
1.96 deraadt 1641: <p>
1.52 deraadt 1642: <ul>
1.112 philen 1643: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1644: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1645: (patch included)</a>
1.112 philen 1646: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1647: </ul>
1.51 deraadt 1648:
1.106 deraadt 1649: <p>
1650: <li>
1.288 matthieu 1651: <a name="20"></a>
1.235 miod 1652:
1.294 david 1653: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1654: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1655: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1656: exist in other operating systems. (If you are running OpenBSD 2.0, we
1657: commend you for being there back in the old days!, but you're really
1658: missing out if you don't install a new version!)
1659:
1660: <p>
1661: <ul>
1.112 philen 1662: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1663: resolver (patch included)</a>
1664: <li>Many others... if people can hunt them down, please let me know
1665: and we'll put them up here.
1666: </ul>
1.51 deraadt 1667: <p>
1.106 deraadt 1668:
1.288 matthieu 1669: <a name="watching"></a>
1.294 david 1670: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1671:
1.21 deraadt 1672: Since we take a proactive stance with security, we are continually
1673: finding and fixing new security problems. Not all of these problems
1.80 espie 1674: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1675: confirmed to be exploitable; many simple bugs we fix do turn out to
1676: have security consequences we could not predict. We do not have the
1677: time resources to make these changes available in the above format.<p>
1.21 deraadt 1678:
1679: Thus there are usually minor security fixes in the current source code
1680: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1681: guarantee that these problems are of minimal impact and unproven
1.44 ian 1682: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1683: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1684:
1.45 deraadt 1685: People who are really concerned with security can do a number of
1686: things:<p>
1.21 deraadt 1687:
1688: <ul>
1689: <li>If you understand security issues, watch our
1.294 david 1690: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1691: eye out for things which appear security related. Since
1.21 deraadt 1692: exploitability is not proven for many of the fixes we make,
1693: do not expect the relevant commit message to say "SECURITY FIX!".
1694: If a problem is proven and serious, a patch will be available
1695: here very shortly after.
1.161 horacio 1696: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1697: security-announce mailing list</a> which will notify you for every
1.186 ian 1698: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1699: and instruct you on how to patch the problem.
1.21 deraadt 1700: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1701: complete system build from time to time (read /usr/src/Makefile
1702: carefully). Users can make the assumption that the current
1703: source tree always has stronger security than the previous release.
1.45 deraadt 1704: However, building your own system from source code is not trivial;
1.265 miod 1705: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1706: transition between major releases.
1.115 ericj 1707: <li>Install a binary snapshot for your
1.80 espie 1708: architecture, which are made available fairly often. For
1.29 deraadt 1709: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1710: </ul>
1711:
1.9 deraadt 1712: <p>
1.288 matthieu 1713: <a name="reporting"></a>
1.294 david 1714: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1715:
1.5 deraadt 1716: <p> If you find a new security problem, you can mail it to
1.294 david 1717: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1718: <br>
1.5 deraadt 1719: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1720: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1721:
1.107 deraadt 1722: <p>
1.288 matthieu 1723: <a name="papers"></a>
1.294 david 1724: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1725:
1726: A number of papers have been written by OpenBSD team members, about security
1727: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1728: documents are available as follows.<p>
1.107 deraadt 1729:
1730: <ul>
1.113 deraadt 1731: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1732: <a href="events.html#usenix99">Usenix 1999</a>,
1733: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1734: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1735: <a href="papers/bcrypt-paper.ps">paper</a> and
1736: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1737: <p>
1738: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1739: <a href="events.html#usenix99">Usenix 1999</a>,
1740: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1741: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1742: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1743: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1744: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1745: <a href="papers/crypt-paper.ps">paper</a> and
1746: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1747: <p>
1748: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1749: <a href="events.html#usenix99">Usenix 1999</a>,
1750: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1751: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1752: <a href="papers/strlcpy-paper.ps">paper</a> and
1753: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1754: <p>
1.118 deraadt 1755: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1756: <a href="events.html#lisa99">LISA 1999</a>,
1757: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1758: <a href="papers/authgw-paper.ps">paper</a> and
1759: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1760: <p>
1.153 jufi 1761: <li>Encrypting Virtual Memory<br>
1.294 david 1762: <a href="events.html#sec2000">Usenix Security 2000</a>,
1763: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1764: <a href="papers/swapencrypt.ps">paper</a> and
1765: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1766: <p>
1.107 deraadt 1767: </ul>
1.294 david 1768: </ul>
1.106 deraadt 1769:
1.2 deraadt 1770: <hr>
1.294 david 1771: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1772: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1773: <br>
1.381 ! deraadt 1774: <small>$OpenBSD: security.html,v 1.380 2009/10/29 08:40:54 landry Exp $</small>
1.1 deraadt 1775:
1.24 deraadt 1776: </body>
1777: </html>
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