Annotation of www/security.html, Revision 1.382
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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>
1.382 ! tobias 244: <li>None yet.
1.378 jasper 245: </ul>
1.382 ! tobias 246:
! 247: <li>
1.373 djm 248: <a name="45"></a>
249:
250: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
251: These are the OpenBSD 4.5 advisories -- all these problems are solved
252: in <a href=anoncvs.html>OpenBSD current</a> and the
253: <a href=stable.html>patch branch</a>.
254:
255: <p>
256: <ul>
1.382 ! tobias 257: <li>None yet.
1.373 djm 258: </ul>
259:
1.382 ! tobias 260: <p>
! 261: OpenBSD 4.4 and earlier releases are not supported anymore. The following
! 262: paragraphs only list advisories issued while they were maintained; these
! 263: releases are likely to be affected by the advisories for more recent releases.
! 264: <br>
! 265:
1.373 djm 266: <li>
1.365 deraadt 267: <a name="44"></a>
268:
269: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
270: These are the OpenBSD 4.4 advisories -- all these problems are solved
271: in <a href=anoncvs.html>OpenBSD current</a> and the
272: <a href=stable.html>patch branch</a>.
273:
274: <p>
275: <ul>
1.372 millert 276: <li><a href="errata44.html#011_sudo">February 22, 2009:
277: sudo(8) may allow a user listed in sudoers to run a command
278: as a different user than their access rule specifies when a Unix
279: group is used in the RunAs portion of the rule.</a>
1.370 djm 280: <li><a href="errata44.html#008_bind">January 15, 2009:
281: named(8) suffered from a similar logic error that may allow
282: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 283: <li><a href="errata44.html#007_openssl">January 9, 2009:
284: OpenSSL suffered from some logic errors that allowed bypass
285: of DSA/ECDSA certificate validation.</a>
1.367 brad 286: <li><a href="errata44.html#001_ndp">November 2, 2008:
287: The Neighbor Discovery Protocol (ndp) did not correctly verify
288: neighbor solicitation requests maybe allowing a nearby attacker
289: to intercept traffic.</a>
1.365 deraadt 290: </ul>
291:
292: <li>
1.357 brad 293: <a name="43"></a>
294:
295: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
296: These are the OpenBSD 4.3 advisories -- all these problems are solved
297: in <a href=anoncvs.html>OpenBSD current</a> and the
298: <a href=stable.html>patch branch</a>.
299:
300: <p>
301: <ul>
1.372 millert 302: <li><a href="errata43.html#011_sudo">February 22, 2009:
303: sudo(8) may allow a user listed in sudoers to run a command
304: as a different user than their access rule specifies when a Unix
305: group is used in the RunAs portion of the rule.</a>
1.370 djm 306: <li><a href="errata43.html#008_bind">January 15, 2009:
307: named(8) suffered from a similar logic error that may allow
308: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 309: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 310: OpenSSL suffered from some logic errors that allowed bypass
311: of DSA/ECDSA certificate validation.</a>
1.382 ! tobias 312: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 313: The Neighbor Discovery Protocol (ndp) did not correctly verify
314: neighbor solicitation requests maybe allowing a nearby attacker
315: to intercept traffic.</a>
1.362 brad 316: <li><a href="errata43.html#004_bind">July 23, 2008:
317: A vulnerability has been found with BIND.</a>
1.361 brad 318: <li><a href="errata43.html#003_xorg">July 15, 2008:
319: Multiple vulnerabilities in X.Org.</a>
1.359 brad 320: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 321: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 322: <li><a href="errata43.html#001_openssh">March 30, 2008:
323: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 324: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 325: </ul>
326:
327: <li>
1.348 merdely 328: <a name="42"></a>
329: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
330: These are the OpenBSD 4.2 advisories -- all these problems are solved
331: in <a href=anoncvs.html>OpenBSD current</a> and the
332: <a href=stable.html>patch branch</a>.
333:
334: <p>
335: <ul>
1.364 tobias 336: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 337: The Neighbor Discovery Protocol (ndp) did not correctly verify
338: neighbor solicitation requests maybe allowing a nearby attacker
339: to intercept traffic.</a>
1.362 brad 340: <li><a href="errata42.html#013_bind">July 23, 2008:
341: A vulnerability has been found with BIND.</a>
1.361 brad 342: <li><a href="errata42.html#012_xorg2">July 15, 2008:
343: Multiple vulnerabilities in X.Org.</a>
1.359 brad 344: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 345: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 346: <li><a href="errata42.html#010_openssh">March 30, 2008:
347: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 348: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 349: <li><a href="errata42.html#009_ppp">March 7, 2008:
350: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 351: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
352: Multiple vulnerabilities in X.Org.</a>
1.351 okan 353: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
354: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 355: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 356: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 357: </ul>
358:
359: <li>
1.346 matthieu 360: <a name="41"></a>
361:
362: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
363: These are the OpenBSD 4.1 advisories -- all these problems are solved
364: in <a href=anoncvs.html>OpenBSD current</a> and the
365: <a href=stable.html>patch branch</a>.
366:
367: <p>
368: <ul>
1.359 brad 369: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 370: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 371: <li><a href="errata41.html#015_openssh">March 30, 2008:
372: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 373: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 374: <li><a href="errata41.html#014_ppp">March 7, 2008:
375: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 376: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
377: Multiple vulnerabilities in X.Org.</a>
378: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
379: The SSL_get_shared_ciphers() function in OpenSSL contains
380: an off-by-one overflow.</a>
1.350 deraadt 381: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 382: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 383: <li><a href="errata41.html#009_file">Jul 9, 2007:
384: Fix possible heap overflow in file(1).</a>
1.346 matthieu 385: <li><a href="errata41.html#005_route6">Apr 27, 2007:
386: IPv6 type 0 route headers can be used to mount a DoS attack
387: against hosts and networks.</a>
388: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
389: Multiple vulnerabilities in X.Org.</a>
390: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
391: Incorrect mbuf handling for ICMP6 packets.</a>
392: </ul>
393:
394: <li>
1.334 brad 395: <a name="40"></a>
396: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
397: These are the OpenBSD 4.0 advisories -- all these problems are solved
398: in <a href=anoncvs.html>OpenBSD current</a> and the
399: <a href=stable.html>patch branch</a>.
400:
401: <p>
402: <ul>
1.382 ! tobias 403: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
! 404: The SSL_get_shared_ciphers() function in OpenSSL contains an
! 405: off-by-one overflow.</a>
1.350 deraadt 406: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 407: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 408: <li><a href="errata40.html#015_file">Jul 9, 2007:
409: Fix possible heap overflow in file(1).</a>
1.343 deraadt 410: <li><a href="errata40.html#012_route6">Apr 23, 2007:
411: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 412: against hosts and networks.</a>
1.342 mbalmer 413: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
414: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 415: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
416: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 417: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 418: Insufficient validation in vga(4) may allow an attacker to gain
419: root privileges on some i386 systems.</a>
1.339 deraadt 420: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 421: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 422: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 423: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
424: found by Chris Evans.</a>
1.339 deraadt 425: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 426: Several problems have been found in OpenSSL.</a>
1.339 deraadt 427: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 428: httpd(8) does not sanitize the Expect header from an HTTP request
429: when it is reflected back in an error message, which might allow
430: cross-site scripting (XSS) style attacks.</a>
431: </ul>
432:
433: <li>
1.321 brad 434: <a name="39"></a>
435:
436: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
437: These are the OpenBSD 3.9 advisories -- all these problems are solved
438: in <a href=anoncvs.html>OpenBSD current</a> and the
439: <a href=stable.html>patch branch</a>.
440:
441: <p>
442: <ul>
1.343 deraadt 443: <li><a href="errata39.html#022_route6">Apr 23, 2007:
444: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 445: against hosts and networks.</a>
1.342 mbalmer 446: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
447: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 448: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
449: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 450: <li><a href="errata39.html#agp">Jan 3, 2007:
451: Insufficient validation in vga(4) may allow an attacker to gain
452: root privileges on some i386 systems.</a>
1.336 brad 453: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 454: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 455: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 456: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 457: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 458: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 459: found by Chris Evans.</a>
1.333 deraadt 460: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 461: Several problems have been found in OpenSSL.</a>
1.333 deraadt 462: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 463: httpd(8) does not sanitize the Expect header from an HTTP request
464: when it is reflected back in an error message, which might allow
465: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 466: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 467: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
468: possible for an attacker to construct an invalid signature which
469: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 470: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 471: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 472: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 473: Due to the failure to correctly validate LCP configuration option
474: lengths, it is possible for an attacker to send LCP packets via an
475: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 476: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 477: A problem in isakmpd(8) caused IPsec to run partly without replay
478: protection.</a>
1.333 deraadt 479: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 480: It is possible to cause the kernel to panic when more than the default
481: number of sempahores have been allocated.</a>
1.333 deraadt 482: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 483: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
484: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
485: option.</a>
1.333 deraadt 486: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 487: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 488: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 489: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
490: overflow.</a>
1.333 deraadt 491: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 492: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 493: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 494: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 495: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 496: A race condition has been reported to exist in the handling by sendmail
497: of asynchronous signals.</a>
498: </ul>
499:
500: <li>
1.318 deraadt 501: <a name="38"></a>
502:
503: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
504: These are the OpenBSD 3.8 advisories -- all these problems are solved
505: in <a href=anoncvs.html>OpenBSD current</a> and the
506: <a href=stable.html>patch branch</a>.
507:
508: <p>
509: <ul>
1.332 brad 510: <li><a href="errata38.html#ssh2">Oct 12, 2006:
511: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 512: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 513: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 514: found by Chris Evans.</a>
515: <li><a href="errata38.html#openssl2">Oct 7, 2006:
516: Several problems have been found in OpenSSL.</a>
517: <li><a href="errata38.html#httpd2">Oct 7, 2006:
518: httpd(8) does not sanitize the Expect header from an HTTP request
519: when it is reflected back in an error message, which might allow
520: cross-site scripting (XSS) style attacks.</a>
1.329 brad 521: <li><a href="errata38.html#openssl">Sep 8, 2006:
522: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
523: possible for an attacker to construct an invalid signature which
524: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 525: <li><a href="errata38.html#bind">Sep 8, 2006:
526: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 527: <li><a href="errata38.html#sppp">Sep 2, 2006:
528: Due to the failure to correctly validate LCP configuration option
529: lengths, it is possible for an attacker to send LCP packets via an
530: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 531: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
532: A problem in isakmpd(8) caused IPsec to run partly without replay
533: protection.</a>
534: <li><a href="errata38.html#sem">Aug 25, 2006:
535: It is possible to cause the kernel to panic when more than the default
536: number of sempahores have been allocated.</a>
537: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
538: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
539: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
540: option.</a>
541: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
542: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 543: <li><a href="errata38.html#httpd">Jul 30, 2006:
544: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
545: overflow.</a>
1.324 brad 546: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
547: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 548: <li><a href="errata38.html#xorg">May 2, 2006:
549: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 550: <li><a href="errata38.html#sendmail">Mar 25, 2006:
551: A race condition has been reported to exist in the handling by sendmail
552: of asynchronous signals.</a>
553: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 554: Josh Bressers has reported a weakness in OpenSSH caused due to the
555: insecure use of the system(3) function in scp(1) when performing copy
556: operations using filenames that are supplied by the user from the
557: command line.</a>
1.321 brad 558: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 559: Do not allow users to trick suid programs into re-opening files via
560: /dev/fd.</a>
1.321 brad 561: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 562: A buffer overflow has been found in the Perl interpreter with the
563: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 564: </ul>
565:
566: <li>
1.312 david 567: <a name="37"></a>
568:
569: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
570: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 571: in <a href="anoncvs.html">OpenBSD current</a>. The
572: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
573: you should update your machine.
1.312 david 574:
575: <p>
576: <ul>
1.322 brad 577: <li><a href="errata37.html#xorg">May 2, 2006:
578: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 579: <li><a href="errata37.html#sendmail">Mar 25, 2006:
580: A race condition has been reported to exist in the handling by sendmail
581: of asynchronous signals.</a>
1.320 brad 582: <li><a href="errata37.html#ssh">Feb 12, 2006:
583: Josh Bressers has reported a weakness in OpenSSH caused due to the
584: insecure use of the system(3) function in scp(1) when performing copy
585: operations using filenames that are supplied by the user from the
586: command line.</a>
1.319 brad 587: <li><a href="errata37.html#fd">Jan 5, 2006:
588: Do not allow users to trick suid programs into re-opening files via
589: /dev/fd.</a>
590: <li><a href="errata37.html#perl">Jan 5, 2006:
591: A buffer overflow has been found in the Perl interpreter with the
592: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 593: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 594: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 595: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 596: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 597: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 598: Fix a race condition in sudo(8) that could allow a user
1.315 millert 599: to run arbitrary commands.</a>
1.318 deraadt 600: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 601: Fix a buffer overflow, memory leaks, and NULL pointer
602: dereference in cvs(1).</a>
1.312 david 603: </ul>
604:
605: <li>
1.301 miod 606: <a name="36"></a>
607:
608: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
609: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 610: in <a href="anoncvs.html">OpenBSD current</a>. The
611: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
612: you should update your machine.
1.301 miod 613:
614: <p>
1.302 markus 615: <ul>
1.317 millert 616: <li><a href="errata36.html#libz2">Jul 21, 2005:
617: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 618: <li><a href="errata36.html#libz">Jul 6, 2005:
619: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 620: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 621: Fix a race condition in sudo(8) that could allow a user
1.315 millert 622: to run arbitrary commands.</a>
1.311 deraadt 623: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 624: Fix a buffer overflow, memory leaks, and NULL pointer
625: dereference in cvs(1).</a>
1.311 deraadt 626: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 627: Due to buffer overflows in telnet(1), a malicious
628: server or man-in-the-middle attack could allow
629: execution of arbitrary code with the privileges of
630: the user invoking telnet(1).</a>
1.311 deraadt 631: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 632: More stringent checking should be done in the copy(9)
633: functions to prevent their misuse.</a>
1.311 deraadt 634: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 635: More stringent checking should be done in the copy(9)
636: functions to prevent their misuse.</a>
1.311 deraadt 637: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 638: httpd(8)'s mod_include module fails to properly validate
639: the length of user supplied tag strings prior to copying
1.305 brad 640: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 641: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 642: On systems running isakmpd(8) it is possible for a local
643: user to cause kernel memory corruption and system panic by
1.303 markus 644: setting ipsec(4) credentials on a socket.</a>
1.302 markus 645: </ul>
1.301 miod 646:
647: <li>
1.288 matthieu 648: <a name="35"></a>
1.279 deraadt 649:
1.294 david 650: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 651: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 652: in <a href="anoncvs.html">OpenBSD current</a>. The
653: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
654: you should update your machine.
1.279 deraadt 655:
656: <p>
657: <ul>
1.310 brad 658: <li><a href="errata35.html#cvs4">Apr 28, 2005:
659: Fix a buffer overflow, memory leaks, and NULL pointer
660: dereference in cvs(1).</a>
1.309 brad 661: <li><a href="errata35.html#telnet">Mar 30, 2005:
662: Due to buffer overflows in telnet(1), a malicious
663: server or man-in-the-middle attack could allow
664: execution of arbitrary code with the privileges of
665: the user invoking telnet(1).</a>
1.308 brad 666: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 667: More stringent checking should be done in the copy(9)
668: functions to prevent their misuse.</a>
1.306 brad 669: <li><a href="errata35.html#locore">Feb 28, 2005:
670: More stringent checking should be done in the copy(9)
671: functions to prevent their misuse.</a>
1.304 brad 672: <li><a href="errata35.html#httpd3">Jan 12, 2005:
673: httpd(8)'s mod_include module fails to properly validate
674: the length of user supplied tag strings prior to copying
1.305 brad 675: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 676: <li><a href="errata35.html#pfkey">Dec 14, 2004:
677: On systems running isakmpd(8) it is possible for a local
678: user to cause kernel memory corruption and system panic by
1.303 markus 679: setting ipsec(4) credentials on a socket.</a>
1.301 miod 680: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 681: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 682: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 683: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 684: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 685: httpd(8)'s mod_rewrite module can be made to write one zero byte in
686: an arbitrary memory position outside of a char array, causing a DoS
687: or possibly buffer overflows.</a>
1.301 miod 688: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 689: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 690: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 691: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 692: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 693: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 694: Multiple remote vulnerabilities have been found in the cvs(1)
695: server which can be used by CVS clients to crash or execute
1.293 brad 696: arbitrary code on the server.</a>
1.301 miod 697: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 698: kdc(8) performs inadequate checking of request fields, leading
699: to the possibility of principal impersonation from other
700: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 701: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 702: xdm(1) ignores the requestPort resource and creates a
1.293 brad 703: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 704: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 705: A buffer overflow in the cvs(1) server has been found,
706: which can be used by CVS clients to execute arbitrary code on
1.293 brad 707: the server.</a>
1.301 miod 708: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 709: Integer overflow problems were found in procfs, allowing
1.293 brad 710: reading of arbitrary kernel memory.</a>
1.301 miod 711: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 712: Pathname validation problems have been found in cvs(1),
713: allowing clients and servers access to files outside the
1.293 brad 714: repository or local CVS tree.</a>
1.279 deraadt 715: </ul>
716:
717: <p>
718: <li>
1.288 matthieu 719: <a name="34"></a>
1.261 david 720:
1.294 david 721: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 722: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 723: in <a href="anoncvs.html">OpenBSD current</a>. The
724: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
725: you should update your machine.
1.261 david 726: <p>
727: <ul>
1.302 markus 728: <li><a href="errata34.html#pfkey">Dec 14, 2004:
729: On systems running isakmpd(8) it is possible for a local
730: user to cause kernel memory corruption and system panic by
1.303 markus 731: setting ipsec(4) credentials on a socket.</a>
1.298 brad 732: <li><a href="errata34.html#xpm">Sep 16, 2004:
733: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 734: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
735: httpd(8)'s mod_rewrite module can be made to write one zero byte in
736: an arbitrary memory position outside of a char array, causing a DoS
737: or possibly buffer overflows.</a>
1.294 david 738: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 739: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 740: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 741: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 742: an attacker can delete IPsec tunnels at will.</a>
1.294 david 743: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 744: Multiple remote vulnerabilities have been found in the cvs(1)
745: server which can be used by CVS clients to crash or execute
1.293 brad 746: arbitrary code on the server.</a>
1.294 david 747: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 748: kdc(8) performs inadequate checking of request fields, leading
749: to the possibility of principal impersonation from other
750: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 751: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 752: A buffer overflow in the cvs(1) server has been found,
753: which can be used by CVS clients to execute arbitrary code on
754: the server.</a>
1.294 david 755: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 756: Integer overflow problems were found in procfs, allowing
757: reading of arbitrary kernel memory.</a>
1.294 david 758: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 759: Pathname validation problems have been found in cvs(1),
760: allowing clients and servers access to files outside the
761: repository or local CVS tree.</a>
1.294 david 762: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 763: A missing check for a NULL-pointer dereference may allow a
1.281 otto 764: remote attacker to crash applications using OpenSSL.</a>
1.294 david 765: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 766: Defects in the payload validation and processing functions of
767: isakmpd have been discovered. An attacker could send malformed
768: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 769: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 770: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
771: access module, using IP addresses without a netmask on big endian
772: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 773: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 774: An IPv6 MTU handling problem exists that could be used by an
775: attacker to cause a denial of service attack.</a>
1.294 david 776: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 777: A reference counting bug in shmat(2) could be used to write to
778: kernel memory under certain circumstances.</a>
1.294 david 779: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 780: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 781: by Thomas Walpuski.</a>
1.294 david 782: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 783: It may be possible for a local user to overrun the stack in
784: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 785: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 786: The use of certain ASN.1 encodings or malformed public keys may
787: allow an attacker to mount a denial of service attack against
788: applications linked with ssl(3).</a>
1.261 david 789: </ul>
790:
791: <li>
1.288 matthieu 792: <a name="33"></a>
1.246 deraadt 793:
1.294 david 794: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 795: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 796: in <a href="anoncvs.html">OpenBSD current</a>. The
797: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 798: you should update your machine.
1.246 deraadt 799: <p>
800: <ul>
1.294 david 801: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 802: Pathname validation problems have been found in cvs(1),
803: allowing clients and servers access to files outside the
804: repository or local CVS tree.</a>
1.294 david 805: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 806: A missing check for a NULL-pointer dereference may allow a
1.281 otto 807: remote attacker to crash applications using OpenSSL.</a>
1.294 david 808: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 809: Defects in the payload validation and processing functions of
810: isakmpd have been discovered. An attacker could send malformed
811: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 812: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 813: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
814: access module, using IP addresses without a netmask on big endian
815: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 816: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 817: An IPv6 MTU handling problem exists that could be used by an
818: attacker to cause a denial of service attack.</a>
1.294 david 819: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 820: A reference counting bug in shmat(2) could be used to write to
821: kernel memory under certain circumstances.</a>
1.294 david 822: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 823: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 824: by Thomas Walpuski.</a>
1.294 david 825: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 826: It may be possible for a local user to execute arbitrary code
827: resulting in escalation of privileges due to a stack overrun
828: in compat_ibcs2(8).</a>
1.294 david 829: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 830: The use of certain ASN.1 encodings or malformed public keys may
831: allow an attacker to mount a denial of service attack against
832: applications linked with ssl(3).</a>
1.294 david 833: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 834: Access of freed memory in pf(4) could be used to
1.260 margarid 835: remotely panic a machine using scrub rules.</a>
1.294 david 836: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 837: A buffer overflow in the address parsing in
838: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 839: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 840: OpenSSH versions prior to 3.7 contains a buffer management error
841: that is potentially exploitable.</a>
1.294 david 842: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 843: Root may be able to reduce the security level by taking advantage of
844: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 845: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 846: An improper bounds check in the kernel may allow a local user
847: to panic the kernel.</a>
1.294 david 848: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 849: An off-by-one error exists in the C library function realpath(3)
850: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 851: </ul>
852:
1.265 miod 853:
1.247 david 854: <p>
1.246 deraadt 855: <li>
1.288 matthieu 856: <a name="32"></a>
1.224 deraadt 857:
1.294 david 858: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 859: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 860: in <a href="anoncvs.html">OpenBSD current</a>. The
861: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 862: you should update your machine.
1.224 deraadt 863: <p>
864: <ul>
1.294 david 865: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 866: The use of certain ASN.1 encodings or malformed public keys may
867: allow an attacker to mount a denial of service attack against
868: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 869: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 870: Access of freed memory in pf(4) could be used to
1.260 margarid 871: remotely panic a machine using scrub rules.</a>
1.294 david 872: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 873: A buffer overflow in the address parsing in
874: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 875: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 876: OpenSSH versions prior to 3.7 contains a buffer management error
877: that is potentially exploitable.</a>
1.294 david 878: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 879: Fix for a potential security issue in
880: sendmail(8) with respect to DNS maps.</a>
1.294 david 881: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 882: An off-by-one error exists in the C library function realpath(3)
883: may allow an attacker to gain escalated privileges.</a>
1.294 david 884: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 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="errata32.html#kerberos">March 24, 2003:
1.242 millert 888: A cryptographic weaknesses in the Kerberos v4 protocol can be
889: exploited on Kerberos v5 as well.</a>
1.294 david 890: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 891: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 892: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 893: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 894: Various SSL and TLS operations in OpenSSL are vulnerable to
895: timing attacks.</a>
1.294 david 896: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 897: A buffer overflow in lprm(1) may allow an attacker to elevate
898: privileges to user daemon.</a>.
1.294 david 899: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 900: A buffer overflow in the envelope comments processing in
901: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 902: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 903: httpd(8) leaks file inode numbers via ETag header as well as
904: child PIDs in multipart MIME boundary generation. This could
905: lead, for example, to NFS exploitation because it uses inode
906: numbers as part of the file handle.</a>
1.294 david 907: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 908: In ssl(8) an information leak can occur via timing by performing
909: a MAC computation even if incorrect block cipher padding has
910: been found, this is a countermeasure. Also, check for negative
911: sizes, in allocation routines.</a>
1.294 david 912: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 913: A double free exists in cvs(1) that could lead to privilege
914: escalation for cvs configurations where the cvs command is
1.233 margarid 915: run as a privileged user.</a>
1.294 david 916: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 917: A buffer overflow exists in named(8) that could lead to a
918: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 919: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 920: A logic error in the pool kernel memory allocator could cause
921: memory corruption in low-memory situations, causing the system
922: to crash.</a>
1.294 david 923: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 924: An attacker can bypass smrsh(8)'s restrictions and execute
925: arbitrary commands with the privileges of his own account.</a>
1.294 david 926: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 927: Network bridges running pf with scrubbing enabled could cause
928: mbuf corruption, causing the system to crash.</a>
1.294 david 929: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 930: A buffer overflow can occur in the kadmind(8) daemon, leading
931: to possible remote crash or exploit.</a>
1.224 deraadt 932: </ul>
933:
1.227 miod 934: <p>
935: <li>
1.288 matthieu 936: <a name="31"></a>
1.203 deraadt 937:
1.294 david 938: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 939: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 940: in <a href="anoncvs.html">OpenBSD current</a>. The
941: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 942: you should update your machine.
1.203 deraadt 943:
944: <p>
945: <ul>
1.294 david 946: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 947: A buffer overflow in the address parsing in
948: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 949: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 950: A cryptographic weaknesses in the Kerberos v4 protocol can be
951: exploited on Kerberos v5 as well.</a>
1.294 david 952: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 953: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 954: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 955: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 956: Various SSL and TLS operations in OpenSSL are vulnerable to
957: timing attacks.</a>
1.294 david 958: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 959: A buffer overflow in lprm(1) may allow an attacker to gain
960: root privileges.</a>
1.294 david 961: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 962: A buffer overflow in the envelope comments processing in
963: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 964: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 965: In ssl(8) an information leak can occur via timing by performing
966: a MAC computation even if incorrect block cipher padding has
967: been found, this is a countermeasure. Also, check for negative
968: sizes, in allocation routines.</a>
1.294 david 969: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 970: A double free exists in cvs(1) that could lead to privilege
971: escalation for cvs configurations where the cvs command is
1.294 david 972: run as a privileged user</a>.
973: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 974: A buffer overflow exists in named(8) that could lead to a
975: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 976: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 977: Incorrect argument checking in the getitimer(2) system call
978: may allow an attacker to crash the system.</a>
1.294 david 979: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 980: An attacker can bypass smrsh(8)'s restrictions and execute
981: arbitrary commands with the privileges of his own account.</a>
1.294 david 982: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 983: A buffer overflow can occur in the kadmind(8) daemon, leading
984: to possible remote crash or exploit.</a>
1.294 david 985: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 986: Incorrect argument checking in the setitimer(2) system call
987: may allow an attacker to write to kernel memory.</a>
1.294 david 988: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 989: An insufficient boundary check in the select system call
1.220 miod 990: allows an attacker to overwrite kernel memory and execute arbitrary code
991: in kernel context.</a>
1.294 david 992: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 993: Several remote buffer overflows can occur in the SSL2 server and SSL3
994: client of the ssl(8) library, as in the ASN.1 parser code in the
995: crypto(3) library, all of them being potentially remotely
996: exploitable.</a>
1.294 david 997: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 998: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
999: possible remote crash.</a>
1.294 david 1000: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1001: A race condition exists in the pppd(8) daemon which may cause it to
1002: alter the file permissions of an arbitrary file.</a>
1.294 david 1003: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1004: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1005: crash.</a>
1.294 david 1006: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1007: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1008: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1009: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1010: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1011: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1012: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1013: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1014: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1015: input validation error that can result in an integer overflow and
1016: privilege escalation.</a>
1.294 david 1017: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1018: A buffer overflow can occur during the interpretation of chunked
1019: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1020: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1021: Under certain conditions, on systems using YP with netgroups
1022: in the password database, it is possible that sshd(8) does
1023: ACL checks for the requested user name but uses the password
1024: database entry of a different user for authentication. This
1025: means that denied users might authenticate successfully
1026: while permitted users could be locked out.</a>
1.294 david 1027: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1028: A race condition exists that could defeat the kernel's
1029: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1030: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1031: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1032: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1033: A local user can gain super-user privileges due to a buffer
1034: overflow in sshd(8) if AFS has been configured on the system
1035: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1036: in the sshd_config file.</a>
1.203 deraadt 1037: </ul>
1038:
1.235 miod 1039: <p>
1.203 deraadt 1040: <li>
1.288 matthieu 1041: <a name="30"></a>
1.187 deraadt 1042:
1.294 david 1043: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1044: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1045: in <a href="anoncvs.html">OpenBSD current</a>. The
1046: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1047: you should update your machine.
1.187 deraadt 1048:
1049: <p>
1050: <ul>
1.294 david 1051: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1052: A buffer overflow exists in named(8) that could lead to a
1053: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1054: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1055: Incorrect argument checking in the getitimer(2) system call
1056: may allow an attacker to crash the system.</a>
1.294 david 1057: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1058: An attacker can bypass smrsh(8)'s restrictions and execute
1059: arbitrary commands with the privileges of his own account.</a>
1.294 david 1060: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1061: A buffer overflow can occur in the kadmind(8) daemon, leading
1062: to possible remote crash or exploit.</a>
1.294 david 1063: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1064: Incorrect argument checking in the setitimer(2) system call
1065: may allow an attacker to write to kernel memory.</a>
1.294 david 1066: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1067: An insufficient boundary check in the select and poll system calls
1068: allows an attacker to overwrite kernel memory and execute arbitrary code
1069: in kernel context.</a>
1.294 david 1070: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1071: Several remote buffer overflows can occur in the SSL2 server and SSL3
1072: client of the ssl(8) library, as in the ASN.1 parser code in the
1073: crypto(3) library, all of them being potentially remotely
1074: exploitable.</a>
1.294 david 1075: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1076: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1077: possible remote crash.</a>
1.294 david 1078: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1079: A race condition exists in the pppd(8) daemon which may cause it to
1080: alter the file permissions of an arbitrary file.</a>
1.294 david 1081: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1082: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1083: crash.</a>
1.294 david 1084: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1085: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1086: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1087: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1088: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1089: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1090: input validation error that can result in an integer overflow and
1091: privilege escalation.</a>
1.294 david 1092: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1093: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1094: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1095: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1096: A buffer overflow can occur during the interpretation of chunked
1097: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1098: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1099: A race condition exists that could defeat the kernel's
1100: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1101: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1102: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1103: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1104: A local user can gain super-user privileges due to a buffer
1105: overflow in sshd(8) if AFS has been configured on the system
1106: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1107: in the sshd_config file.</a>
1.294 david 1108: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1109: The mail(1) was interpreting tilde escapes even when invoked
1110: in non-interactive mode. As mail(1) is called as root from cron,
1111: this can lead to a local root compromise.</a>
1.294 david 1112: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1113: Under certain conditions, on systems using YP with netgroups in
1114: the password database, it is possible for the rexecd(8) and rshd(8)
1115: daemons to execute a shell from a password database entry for a
1116: different user. Similarly, atrun(8) may change to the wrong
1117: home directory when running jobs.</a>
1.294 david 1118: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1119: A potential double free() exists in the zlib library;
1120: this is not exploitable on OpenBSD.
1121: The kernel also contains a copy of zlib; it is not
1122: currently known if the kernel zlib is exploitable.</a>
1.294 david 1123: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1124: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1125: may allow a local user to gain super-user privileges.</a>
1.294 david 1126: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1127: A race condition between the ptrace(2) and execve(2) system calls
1128: allows an attacker to modify the memory contents of suid/sgid
1129: processes which could lead to compromise of the super-user account.</a>
1.294 david 1130: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1131: There is a security hole in sudo(8) that can be exploited
1132: when the Postfix sendmail replacement is installed that may
1133: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1134: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1135: An attacker can trick a machine running the lpd daemon into
1136: creating new files in the root directory from a machine with
1137: remote line printer access.</a>
1.294 david 1138: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1139: The vi.recover script can be abused in such a way as
1140: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1141: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1142: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1143: resulting in a crash.</a>
1.294 david 1144: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1145: A security hole that may allow an attacker to partially authenticate
1146: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1147: </ul>
1148:
1149: <p>
1150: <li>
1.288 matthieu 1151: <a name="29"></a>
1.173 deraadt 1152:
1.294 david 1153: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1154: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1155: in <a href="anoncvs.html">OpenBSD current</a>. The
1156: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1157: you should update your machine.
1158:
1.173 deraadt 1159:
1160: <p>
1161: <ul>
1.294 david 1162: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1163: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1164: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1165: A race condition exists that could defeat the kernel's
1166: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1167: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1168: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1169: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1170: A local user can gain super-user privileges due to a buffer
1171: overflow in sshd(8) if AFS has been configured on the system
1172: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1173: in the sshd_config file.</a>
1.294 david 1174: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1175: The mail(1) was interpreting tilde escapes even when invoked
1176: in non-interactive mode. As mail(1) is called as root from cron,
1177: this can lead to a local root compromise.</a>
1.294 david 1178: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1179: A potential double free() exists in the zlib library;
1180: this is not exploitable on OpenBSD.
1181: The kernel also contains a copy of zlib; it is not
1182: currently known if the kernel zlib is exploitable.</a>
1.294 david 1183: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1184: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1185: may allow a local user to gain super-user privileges.</a>
1.294 david 1186: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1187: A race condition between the ptrace(2) and execve(2) system calls
1188: allows an attacker to modify the memory contents of suid/sgid
1189: processes which could lead to compromise of the super-user account.</a>
1.294 david 1190: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1191: There is a security hole in sudo(8) that can be exploited
1192: when the Postfix sendmail replacement is installed that may
1193: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1194: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1195: An attacker can trick a machine running the lpd daemon into
1196: creating new files in the root directory from a machine with
1197: remote line printer access.</a>
1.294 david 1198: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1199: The vi.recover script can be abused in such a way as
1200: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1201: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1202: A security hole exists in uuxqt(8) that may allow an
1203: attacker to gain root privileges.</a>
1.294 david 1204: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1205: A security hole exists in lpd(8) that may allow an
1206: attacker to gain root privileges if lpd is running.</a>
1.294 david 1207: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1208: A security hole exists in sendmail(8) that may allow an
1209: attacker on the local host to gain root privileges.</a>
1.294 david 1210: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1211: A kernel buffer overflow in the NFS code can be used to execute
1212: arbitrary code by users with mount privileges (only root by
1.181 millert 1213: default).</a>
1.294 david 1214: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1215: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1216: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1217: sshd(8) allows users to delete arbitrary files named "cookies"
1218: if X11 forwarding is enabled. X11 forwarding is disabled
1219: by default.</a>
1.294 david 1220: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1221: Programs using the fts routines can be tricked into changing
1222: into the wrong directory.</a>
1.294 david 1223: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1224: Sendmail signal handlers contain unsafe code,
1225: leading to numerous race conditions.</a>
1.173 deraadt 1226: </ul>
1227:
1228: <p>
1229: <li>
1.288 matthieu 1230: <a name="28"></a>
1.152 deraadt 1231:
1.294 david 1232: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1233: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1234: in <a href="anoncvs.html">OpenBSD current</a>. The
1235: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1236: you should update your machine.
1237:
1.152 deraadt 1238:
1239: <p>
1240: <ul>
1.294 david 1241: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1242: A security hole exists in uuxqt(8) that may allow an
1243: attacker to gain root privileges.</a>
1.294 david 1244: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1245: A security hole exists in lpd(8) that may allow an
1246: attacker to gain root privileges if lpd is running.</a>
1.294 david 1247: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1248: A security hole exists in sendmail(8) that may allow an
1249: attacker on the local host to gain root privileges.</a>
1.294 david 1250: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1251: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1252: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1253: Programs using the fts routines can be tricked into changing
1254: into the wrong directory.</a>
1.294 david 1255: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1256: Sendmail signal handlers contain unsafe code,
1257: leading to numerous race conditions.</a>
1.294 david 1258: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1259: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1260: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1261: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1262: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1263: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1264: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1265: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1266: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1267: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1268: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1269: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1270: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1271: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1272: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1273: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1274: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1275: rnd(4) did not use all of its input when written to.</a>
1.294 david 1276: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1277: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1278: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1279: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1280: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1281: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1282: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1283: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1284: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1285: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1286: </ul>
1287:
1288: <p>
1289: <li>
1.288 matthieu 1290: <a name="27"></a>
1.124 deraadt 1291:
1.294 david 1292: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1293: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1294: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1295: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1296:
1297: <p>
1298: <ul>
1.294 david 1299: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1300: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1301: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1302: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1303: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1304: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1305: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1306: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1307: (patch included)</a>
1.294 david 1308: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1309: X11 libraries have 2 potential overflows in xtrans code.
1310: (patch included)</a>
1.294 david 1311: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1312: Apache mod_rewrite and mod_vhost_alias modules could expose files
1313: on the server in certain configurations if used.
1314: (patch included)</a>
1.294 david 1315: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1316: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1317: TERMPATH and TERMCAP environment variables as it should.
1318: (patch included)</a>
1.294 david 1319: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1320: There are printf-style format string bugs in several privileged
1321: programs. (patch included)</a>
1.294 david 1322: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1323: libcurses honored terminal descriptions in the $HOME/.terminfo
1324: directory as well as in the TERMCAP environment variable for
1325: setuid and setgid applications.
1.146 deraadt 1326: (patch included)</a>
1.294 david 1327: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1328: A format string vulnerability exists in talkd(8).
1329: (patch included)</a>
1.294 david 1330: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1331: A format string vulnerability exists in the pw_error() function of the
1332: libutil library, yielding localhost root through chpass(1).
1333: (patch included)</a>
1.294 david 1334: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1335: Bad ESP/AH packets could cause a crash under certain conditions.
1336: (patch included)</a>
1.294 david 1337: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1338: A format string vulnerability (localhost root) exists in xlock(1).
1339: (patch included)</a>
1.294 david 1340: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1341: Various bugs found in X11 libraries have various side effects, almost
1342: completely denial of service in OpenBSD.
1343: (patch included)</a>
1.294 david 1344: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1345: Just like pretty much all the other unix ftp daemons
1346: on the planet, ftpd had a remote root hole in it.
1347: Luckily, ftpd was not enabled by default.
1.137 deraadt 1348: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1349: (patch included)</a>
1.294 david 1350: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1351: Mopd, very rarely used, contained some buffer overflows.
1352: (patch included)</a>
1.294 david 1353: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1354: libedit would check for a <b>.editrc</b> file in the current
1355: directory. Not known to be a real security issue, but a patch
1356: is available anyways.
1357: (patch included)</a>
1.294 david 1358: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1359: A serious bug in dhclient(8) could allow strings from a
1360: malicious dhcp server to be executed in the shell as root.
1361: (patch included)</a>
1.294 david 1362: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1363: A serious bug in isakmpd(8) policy handling wherein
1364: policy verification could be completely bypassed in isakmpd.
1365: (patch included)</a>
1.294 david 1366: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1367: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1368: should not be used, and results in security problems on
1369: other operating systems.</a>
1.294 david 1370: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1371: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1372: (patch included)</a>
1.294 david 1373: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1374: Improper use of ipf <i>keep-state</i> rules can result
1375: in firewall rules being bypassed. (patch included)</a>
1376:
1.124 deraadt 1377: </ul>
1378:
1379: <p>
1380: <li>
1.288 matthieu 1381: <a name="26"></a>
1.119 deraadt 1382:
1.294 david 1383: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1384: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1385: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1386: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1387:
1388: <p>
1389: <ul>
1.294 david 1390: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1391: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1392: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1393: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1394: Improper use of ipf <i>keep-state</i> rules can result
1395: in firewall rules being bypassed. (patch included)</a>
1.294 david 1396: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1397: xlockmore has a bug which a localhost attacker can use to gain
1398: access to the encrypted root password hash (which is normally
1.245 miod 1399: encoded using blowfish</a> (see
1.294 david 1400: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1401: crypt(3)</a>)
1.245 miod 1402: (patch included).
1.294 david 1403: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1404: Systems running with procfs enabled and mounted are
1405: vulnerable to a very tricky exploit. procfs is not
1406: mounted by default.
1407: (patch included).</a>
1.294 david 1408: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1409: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1410: thus exposing the system to a race where the aliases file
1411: did not exist.
1.119 deraadt 1412: (patch included).</a>
1.294 david 1413: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1414: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1415: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1416: A buffer overflow in the RSAREF code included in the
1417: USA version of libssl, is possibly exploitable in
1418: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1419: (patch included).<br></a>
1420: <strong>Update:</strong> Turns out that this was not exploitable
1421: in any of the software included in OpenBSD 2.6.
1.294 david 1422: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1423: Any user could change interface media configurations, resulting in
1424: a localhost denial of service attack.
1.121 deraadt 1425: (patch included).</a>
1.119 deraadt 1426: </ul>
1427:
1428: <p>
1429: <li>
1.288 matthieu 1430: <a name="25"></a>
1.106 deraadt 1431:
1.294 david 1432: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1433: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1434: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1435: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1436:
1.96 deraadt 1437: <p>
1.104 deraadt 1438: <ul>
1.294 david 1439: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1440: In cron(8), make sure argv[] is NULL terminated in the
1441: fake popen() and run sendmail as the user, not as root.
1442: (patch included).</a>
1.294 david 1443: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1444: filesystems had an overrun in their handling of uio_offset
1445: in their readdir() routines. (These filesystems are not
1446: enabled by default). (patch included).</a>
1.294 david 1447: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1448: when we execve() a new process. (patch included).</a>
1.294 david 1449: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1450: been handled by IPsec may be transmitted as cleartext.
1451: PF_KEY SA expirations may leak kernel resources.
1452: (patch included).</a>
1.294 david 1453: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1454: motd re-writing and change the find(1) to use -execdir
1455: (patch included).</a>
1.294 david 1456: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1457: users to chflags(2) or fchflags(2) on character or block devices
1458: which they may currently be the owner of (patch included).</a>
1.294 david 1459: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1460: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1461: </ul>
1462:
1.106 deraadt 1463: <p>
1464: <li>
1.288 matthieu 1465: <a name="24"></a>
1.235 miod 1466:
1.294 david 1467: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1468: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1469: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1470: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1471:
1.96 deraadt 1472: <p>
1.75 deraadt 1473: <ul>
1.294 david 1474: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1475: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1476: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1477: another kernel crash case caused by the <strong>crashme</strong>
1478: program (patch included).</a>
1.294 david 1479: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1480: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1481: (patch included).</a>
1.294 david 1482: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1483: existed in ping(8). (patch included).</a>
1.294 david 1484: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1485: the ipq, which could permit an attacker to cause a crash.
1486: (patch included).</a>
1.294 david 1487: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1488: kernel between accept(2) and select(2) could permit an attacker
1489: to hang sockets from remote.
1490: (patch included).</a>
1.294 david 1491: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1492: bog the machine excessively and cause problems.
1493: (patch included).</a>
1.294 david 1494: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1495: DDB interacted to possibly cause a crash.
1496: (patch included).</a>
1.294 david 1497: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1498: (patch included).</a>
1.294 david 1499: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1500: problem in bootpd(8). (patch included).</a>
1.294 david 1501: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1502: exploitable problem relating to environment variables in termcap
1503: and curses. (patch included).</a>
1.294 david 1504: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1505: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1506: </ul>
1507:
1.106 deraadt 1508: <p>
1509: <li>
1.288 matthieu 1510: <a name="23"></a>
1.235 miod 1511:
1.294 david 1512: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1513: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1514: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1515: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1516:
1.96 deraadt 1517: <p>
1.53 matthieu 1518: <ul>
1.294 david 1519: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1520: problem in bootpd(8). (patch included).</a>
1.294 david 1521: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1522: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1523: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1524: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1525: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1526: chpass(1) has a file descriptor leak which allows an
1527: attacker to modify /etc/master.passwd.</a>
1.294 david 1528: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1529: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1530: should not be executed with fd slots 0, 1, or 2 free.
1531: (patch included).</a>
1.294 david 1532: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1533: libraries (patches included).</a>
1.294 david 1534: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1535: processes too permissive (4th revision patch included).</a>
1.294 david 1536: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1537: of immutable and append-only file flags. (patch included).</a>
1.294 david 1538: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1539: if IPSEC is enabled (patch included).</a>
1.294 david 1540: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1541: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1542: </ul>
1.9 deraadt 1543:
1.106 deraadt 1544: <p>
1545: <li>
1.288 matthieu 1546: <a name="22"></a>
1.235 miod 1547:
1.294 david 1548: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1549: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1550: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1551: still exist in other operating systems. (The supplied patches are for
1552: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1553:
1.96 deraadt 1554: <p>
1.9 deraadt 1555: <ul>
1.294 david 1556: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1557: packets if IPSEC is enabled (patch included).</a>
1.294 david 1558: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1559: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1560: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1561: (patch included).</a>
1.294 david 1562: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1563: (patch included).</a>
1.294 david 1564: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1565: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1566: (patch included).</a>
1.294 david 1567: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1568: export (patch included).</a>
1.112 philen 1569: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1570: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1571: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1572: Acceptance.</a>
1.294 david 1573: A patch is available <a href="errata22.html#sourceroute">here</a>.
1574: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1575: flaw (patch included).</a>
1.294 david 1576: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1577: </ul>
1578:
1.106 deraadt 1579: <p>
1580: <li>
1.288 matthieu 1581: <a name="21"></a>
1.235 miod 1582:
1.294 david 1583: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1584: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1585: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1586: exist in other operating systems. (If you are running OpenBSD 2.1, we
1587: would strongly recommend an upgrade to the newest release, as this
1588: patch list only attempts at fixing the most important security
1589: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1590: security problems. Many of those problems were solved in ways which
1591: make it hard for us to provide patches).
1592:
1.96 deraadt 1593: <p>
1.52 deraadt 1594: <ul>
1.112 philen 1595: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1596: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1597: (patch included)</a>
1.112 philen 1598: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1599: </ul>
1.51 deraadt 1600:
1.106 deraadt 1601: <p>
1602: <li>
1.288 matthieu 1603: <a name="20"></a>
1.235 miod 1604:
1.294 david 1605: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1606: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1607: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1608: exist in other operating systems. (If you are running OpenBSD 2.0, we
1609: commend you for being there back in the old days!, but you're really
1610: missing out if you don't install a new version!)
1611:
1612: <p>
1613: <ul>
1.112 philen 1614: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1615: resolver (patch included)</a>
1616: <li>Many others... if people can hunt them down, please let me know
1617: and we'll put them up here.
1618: </ul>
1.51 deraadt 1619: <p>
1.106 deraadt 1620:
1.288 matthieu 1621: <a name="watching"></a>
1.294 david 1622: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1623:
1.21 deraadt 1624: Since we take a proactive stance with security, we are continually
1625: finding and fixing new security problems. Not all of these problems
1.80 espie 1626: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1627: confirmed to be exploitable; many simple bugs we fix do turn out to
1628: have security consequences we could not predict. We do not have the
1629: time resources to make these changes available in the above format.<p>
1.21 deraadt 1630:
1631: Thus there are usually minor security fixes in the current source code
1632: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1633: guarantee that these problems are of minimal impact and unproven
1.44 ian 1634: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1635: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1636:
1.45 deraadt 1637: People who are really concerned with security can do a number of
1638: things:<p>
1.21 deraadt 1639:
1640: <ul>
1641: <li>If you understand security issues, watch our
1.294 david 1642: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1643: eye out for things which appear security related. Since
1.21 deraadt 1644: exploitability is not proven for many of the fixes we make,
1645: do not expect the relevant commit message to say "SECURITY FIX!".
1646: If a problem is proven and serious, a patch will be available
1647: here very shortly after.
1.161 horacio 1648: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1649: security-announce mailing list</a> which will notify you for every
1.186 ian 1650: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1651: and instruct you on how to patch the problem.
1.21 deraadt 1652: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1653: complete system build from time to time (read /usr/src/Makefile
1654: carefully). Users can make the assumption that the current
1655: source tree always has stronger security than the previous release.
1.45 deraadt 1656: However, building your own system from source code is not trivial;
1.265 miod 1657: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1658: transition between major releases.
1.115 ericj 1659: <li>Install a binary snapshot for your
1.80 espie 1660: architecture, which are made available fairly often. For
1.29 deraadt 1661: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1662: </ul>
1663:
1.9 deraadt 1664: <p>
1.288 matthieu 1665: <a name="reporting"></a>
1.294 david 1666: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1667:
1.5 deraadt 1668: <p> If you find a new security problem, you can mail it to
1.294 david 1669: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1670: <br>
1.5 deraadt 1671: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1672: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1673:
1.107 deraadt 1674: <p>
1.288 matthieu 1675: <a name="papers"></a>
1.294 david 1676: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1677:
1678: A number of papers have been written by OpenBSD team members, about security
1679: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1680: documents are available as follows.<p>
1.107 deraadt 1681:
1682: <ul>
1.113 deraadt 1683: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1684: <a href="events.html#usenix99">Usenix 1999</a>,
1685: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1686: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1687: <a href="papers/bcrypt-paper.ps">paper</a> and
1688: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1689: <p>
1690: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1691: <a href="events.html#usenix99">Usenix 1999</a>,
1692: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1693: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1694: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1695: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1696: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1697: <a href="papers/crypt-paper.ps">paper</a> and
1698: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1699: <p>
1700: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1701: <a href="events.html#usenix99">Usenix 1999</a>,
1702: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1703: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1704: <a href="papers/strlcpy-paper.ps">paper</a> and
1705: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1706: <p>
1.118 deraadt 1707: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1708: <a href="events.html#lisa99">LISA 1999</a>,
1709: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1710: <a href="papers/authgw-paper.ps">paper</a> and
1711: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1712: <p>
1.153 jufi 1713: <li>Encrypting Virtual Memory<br>
1.294 david 1714: <a href="events.html#sec2000">Usenix Security 2000</a>,
1715: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1716: <a href="papers/swapencrypt.ps">paper</a> and
1717: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1718: <p>
1.107 deraadt 1719: </ul>
1.294 david 1720: </ul>
1.106 deraadt 1721:
1.2 deraadt 1722: <hr>
1.294 david 1723: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1724: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1725: <br>
1.382 ! tobias 1726: <small>$OpenBSD: security.html,v 1.381 2009/11/01 00:25:36 deraadt Exp $</small>
1.1 deraadt 1727:
1.24 deraadt 1728: </body>
1729: </html>
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