Annotation of www/security.html, Revision 1.387
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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.387 ! miod 57: <a href="#34">3.4</a>,
1.365 deraadt 58: <br>
1.301 miod 59: <a href="#35">3.5</a>,
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 deraadt 67: <a href="#43">4.3</a>,
1.377 tobias 68: <a href="#44">4.4</a>,
1.378 jasper 69: <a href="#45">4.5</a>,
1.385 jasper 70: <a href="#46">4.6</a>,
1.387 ! miod 71: <a href="#47">4.7</a>,
! 72: <a href="#48">4.8</a>,
! 73: <a href="#49">4.9</a>.
1.114 philen 74: </td>
75: </tr>
76: </table>
1.56 deraadt 77: <hr>
78:
1.294 david 79: <a name="goals"></a>
1.278 deraadt 80: <ul>
1.294 david 81: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 82:
1.14 deraadt 83: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 84: ONE in the industry for security (if we are not already there). Our
85: open software development model permits us to take a more
86: uncompromising view towards increased security than Sun, SGI, IBM, HP,
87: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 88: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 89: cryptography</a>, we are able to take cryptographic approaches towards
90: fixing security problems.<p>
1.18 deraadt 91:
1.288 matthieu 92: <a name="disclosure"></a>
1.294 david 93: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 94:
1.45 deraadt 95: Like many readers of the
1.196 jufi 96: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 97: BUGTRAQ mailing list</a>,
1.106 deraadt 98: we believe in full disclosure of security problems. In the
99: operating system arena, we were probably the first to embrace
100: the concept. Many vendors, even of free software, still try
101: to hide issues from their users.<p>
102:
103: Security information moves very fast in cracker circles. On the other
104: hand, our experience is that coding and releasing of proper security
105: fixes typically requires about an hour of work -- very fast fix
106: turnaround is possible. Thus we think that full disclosure helps the
107: people who really care about security.<p>
108:
1.288 matthieu 109: <a name="process"></a>
1.294 david 110: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 111:
1.12 deraadt 112: Our security auditing team typically has between six and twelve
1.45 deraadt 113: members who continue to search for and fix new security holes. We
114: have been auditing since the summer of 1996. The process we follow to
115: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 116: every critical software component. We are not so much looking for
117: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 118: years later someone discovers the problem used to be a security
1.106 deraadt 119: issue, and we fixed it because it was just a bug, well, all the
120: better. Flaws have been found in just about every area of the system.
121: Entire new classes of security problems have been found during our
122: audit, and often source code which had been audited earlier needs
123: re-auditing with these new flaws in mind. Code often gets audited
124: multiple times, and by multiple people with different auditing
125: skills.<p>
1.12 deraadt 126:
1.94 deraadt 127: Some members of our security auditing team worked for Secure Networks,
128: the company that made the industry's premier network security scanning
129: software package Ballista (Secure Networks got purchased by Network
130: Associates, Ballista got renamed to Cybercop Scanner, and well...)
131: That company did a lot of security research, and thus fit in well
1.106 deraadt 132: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
133: colours since day 1.<p>
1.31 deraadt 134:
1.34 deraadt 135: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 136: In most cases we have found that the determination of exploitability
137: is not an issue. During our ongoing auditing process we find many
138: bugs, and endeavor to fix them even though exploitability is not
139: proven. We fix the bug, and we move on to find other bugs to fix. We
140: have fixed many simple and obvious careless programming errors in code
141: and only months later discovered that the problems were in fact
142: exploitable. (Or, more likely someone on
1.197 jufi 143: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 144: would report that other operating systems were vulnerable to a `newly
145: discovered problem', and then it would be discovered that OpenBSD had
146: been fixed in a previous release). In other cases we have been saved
147: from full exploitability of complex step-by-step attacks because we
148: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 149: managed such a success is the lpd advisory that Secure Networks put out.
150: <p>
1.29 deraadt 151:
1.288 matthieu 152: <a name="newtech"></a>
1.294 david 153: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 154:
155: As we audit source code, we often invent new ways of solving problems.
156: Sometimes these ideas have been used before in some random application
157: written somewhere, but perhaps not taken to the degree that we do.
158: <p>
159:
160: <ul>
161: <li>strlcpy() and strlcat()
162: <li>Memory protection purify
163: <ul>
164: <li>W^X
165: <li>.rodata segment
166: <li>Guard pages
167: <li>Randomized malloc()
168: <li>Randomized mmap()
169: <li>atexit() and stdio protection
170: </ul>
1.295 otto 171: <li>Privilege separation
1.278 deraadt 172: <li>Privilege revocation
173: <li>Chroot jailing
174: <li>New uids
175: <li>ProPolice
176: <li>... and others
177: </ul>
178: <p>
179:
1.294 david 180: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 181:
1.45 deraadt 182: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 183: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 184: commonplace in security forums like
1.197 jufi 185: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 186:
1.45 deraadt 187: The most intense part of our security auditing happened immediately
1.80 espie 188: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 189: over the last third of 1996 and first half of 1997. Thousands (yes,
190: thousands) of security issues were fixed rapidly over this year-long
191: period; bugs like the standard buffer overflows, protocol
192: implementation weaknesses, information gathering, and filesystem
193: races. Hence most of the security problems that we encountered were
194: fixed before our 2.1 release, and then a far smaller number needed
195: fixing for our 2.2 release. We do not find as many problems anymore,
196: it is simply a case of diminishing returns. Recently the security
197: problems we find and fix tend to be significantly more obscure or
198: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 199:
1.35 deraadt 200: <ul>
1.45 deraadt 201: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 202: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 203: to search for more complicated exploits, so we will too.
204: <li>Finding and fixing subtle flaws in complicated software is
205: a lot of fun.
1.35 deraadt 206: </ul>
1.106 deraadt 207: <p>
1.15 deraadt 208:
1.14 deraadt 209: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 210: to find and fix new security flaws.<p>
1.12 deraadt 211:
1.288 matthieu 212: <a name="default"></a>
1.294 david 213: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 214:
215: To ensure that novice users of OpenBSD do not need to become security
216: experts overnight (a viewpoint which other vendors seem to have), we
217: ship the operating system in a Secure by Default mode. All non-essential
218: services are disabled. As the user/administrator becomes more familiar
219: with the system, he will discover that he has to enable daemons and other
220: parts of the system. During the process of learning how to enable a new
221: service, the novice is more likely to learn of security considerations.<p>
222:
223: This is in stark contrast to the increasing number of systems that
224: ship with NFS, mountd, web servers, and various other services enabled
225: by default, creating instantaneous security problems for their users
226: within minutes after their first install.<p>
227:
1.288 matthieu 228: <a name="crypto"></a>
1.294 david 229: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 230:
231: And of course, since the OpenBSD project is based in Canada, it is possible
232: for us to integrate cryptography. For more information, read the page
1.116 deraadt 233: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 234:
1.294 david 235: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 236:
237: <li>
1.387 ! miod 238: <a name="49"></a>
! 239:
! 240: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
! 241: These are the OpenBSD 4.9 advisories -- all these problems are solved
! 242: in <a href=anoncvs.html>OpenBSD current</a> and the
! 243: <a href=stable.html>patch branch</a>.
! 244:
! 245: <p>
! 246: <ul>
! 247: None yet!
! 248: </ul>
! 249:
! 250: <li>
! 251: <a name="48"></a>
! 252:
! 253: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
! 254: These are the OpenBSD 4.8 advisories -- all these problems are solved
! 255: in <a href=anoncvs.html>OpenBSD current</a> and the
! 256: <a href=stable.html>patch branch</a>.
! 257:
! 258: <p>
! 259: <ul>
! 260: <li><a href="errata48.html#009_pf">February 16, 2011:
! 261: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
! 262: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
! 263: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
! 264: prefixes "10.1.1.1/30") are not affected.</a>
! 265: <li><a href="errata48.html#008_openssl">February 11, 2011:
! 266: An incorrectly formatted ClientHello handshake message could cause
! 267: OpenSSL to parse past the end of the message. An attacker could use
! 268: this flaw to trigger an invalid memory access, causing a crash of an
! 269: application linked to OpenSSL. As well, certain applications may expose
! 270: the contents of parsed OCSP extensions, specifically the OCSP nonce
! 271: extension.
! 272: <br>
! 273: Applications are only affected if they act as a server and call
! 274: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
! 275: that nothing in the base OS uses this. Apache httpd started using this
! 276: in v2.3.3; this is newer than the version in ports.</a>
! 277: <li><a href="errata48.html#005_pf">December 17, 2010:
! 278: Insufficent initialization of the pf rule structure in the ioctl
! 279: handler may allow userland to modify kernel memory. By default root
! 280: privileges are needed to add or modify pf rules.</a>
! 281: </ul>
! 282:
! 283: <p>
! 284: OpenBSD 4.7 and earlier releases are not supported anymore. The following
! 285: paragraphs only list advisories issued while they were maintained; these
! 286: releases are likely to be affected by the advisories for more recent releases.
! 287: <br>
! 288:
! 289: <li>
1.385 jasper 290: <a name="47"></a>
291:
292: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
293: These are the OpenBSD 4.7 advisories -- all these problems are solved
294: in <a href=anoncvs.html>OpenBSD current</a> and the
295: <a href=stable.html>patch branch</a>.
296:
297: <p>
298: <ul>
1.387 ! miod 299: <li><a href="errata47.html#013_pf">February 16, 2011:
! 300: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
! 301: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
! 302: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
! 303: prefixes "10.1.1.1/30") are not affected.</a>
! 304: <li><a href="errata47.html#012_openssl">February 11, 2011:
! 305: An incorrectly formatted ClientHello handshake message could cause
! 306: OpenSSL to parse past the end of the message. An attacker could use
! 307: this flaw to trigger an invalid memory access, causing a crash of an
! 308: application linked to OpenSSL. As well, certain applications may expose
! 309: the contents of parsed OCSP extensions, specifically the OCSP nonce
! 310: extension.
! 311: <br>
! 312: Applications are only affected if they act as a server and call
! 313: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
! 314: that nothing in the base OS uses this. Apache httpd started using this
! 315: in v2.3.3; this is newer than the version in ports.</a>
! 316: <li><a href="errata47.html#009_pf">December 17, 2010:
! 317: Insufficent initialization of the pf rule structure in the ioctl
! 318: handler may allow userland to modify kernel memory. By default root
! 319: privileges are needed to add or modify pf rules.</a>
! 320: <li><a href="errata47.html#004_pfsync">April 23, 2010:
! 321: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 322: <li><a href="errata47.html#003_openssl">April 14, 2010:
323: In TLS connections, certain incorrectly formatted records can
324: cause an OpenSSL client or server to crash due to a read
325: attempt at NULL.</a>.
326: </ul>
327:
328: <li>
1.378 jasper 329: <a name="46"></a>
330:
331: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
332: These are the OpenBSD 4.6 advisories -- all these problems are solved
333: in <a href=anoncvs.html>OpenBSD current</a> and the
334: <a href=stable.html>patch branch</a>.
335:
336: <p>
337: <ul>
1.385 jasper 338: <li><a href="errata46.html#010_openssl">April 14, 2010:
339: In TLS connections, certain incorrectly formatted records can
340: cause an OpenSSL client or server to crash due to a read
341: attempt at NULL.</a>.
1.384 jasper 342: <li><a href="errata46.html#006_openssl">March 12, 2010:
343: OpenSSL is susceptible to a buffer overflow due to a failure
344: to check for NULL returns from bn_wexpand function calls</a>.
1.383 sthen 345: <li><a href="errata46.html#004_openssl">November 26, 2009:
346: The SSL/TLS protocol is subject to man-in-the-middle attacks
347: related to renegotiation</a>.
1.378 jasper 348: </ul>
1.382 tobias 349:
350: <li>
1.373 djm 351: <a name="45"></a>
352:
353: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
354: These are the OpenBSD 4.5 advisories -- all these problems are solved
355: in <a href=anoncvs.html>OpenBSD current</a> and the
356: <a href=stable.html>patch branch</a>.
357:
358: <p>
359: <ul>
1.385 jasper 360: <li><a href="errata45.html#016_openssl">April 14, 2010:
361: In TLS connections, certain incorrectly formatted records can
362: cause an OpenSSL client or server to crash due to a read
363: attempt at NULL.</a>.
364: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 365: OpenSSL is susceptible to a buffer overflow due to a failure
366: to check for NULL returns from bn_wexpand function calls</a>.
1.383 sthen 367: <li><a href="errata45.html#010_openssl">November 26, 2009:
368: The SSL/TLS protocol is subject to man-in-the-middle attacks
369: related to renegotiation</a>.
1.373 djm 370: </ul>
371:
372: <li>
1.365 deraadt 373: <a name="44"></a>
374:
375: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
376: These are the OpenBSD 4.4 advisories -- all these problems are solved
377: in <a href=anoncvs.html>OpenBSD current</a> and the
378: <a href=stable.html>patch branch</a>.
379:
380: <p>
381: <ul>
1.372 millert 382: <li><a href="errata44.html#011_sudo">February 22, 2009:
383: sudo(8) may allow a user listed in sudoers to run a command
384: as a different user than their access rule specifies when a Unix
385: group is used in the RunAs portion of the rule.</a>
1.370 djm 386: <li><a href="errata44.html#008_bind">January 15, 2009:
387: named(8) suffered from a similar logic error that may allow
388: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 389: <li><a href="errata44.html#007_openssl">January 9, 2009:
390: OpenSSL suffered from some logic errors that allowed bypass
391: of DSA/ECDSA certificate validation.</a>
1.367 brad 392: <li><a href="errata44.html#001_ndp">November 2, 2008:
393: The Neighbor Discovery Protocol (ndp) did not correctly verify
394: neighbor solicitation requests maybe allowing a nearby attacker
395: to intercept traffic.</a>
1.365 deraadt 396: </ul>
397:
398: <li>
1.357 brad 399: <a name="43"></a>
400:
401: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
402: These are the OpenBSD 4.3 advisories -- all these problems are solved
403: in <a href=anoncvs.html>OpenBSD current</a> and the
404: <a href=stable.html>patch branch</a>.
405:
406: <p>
407: <ul>
1.372 millert 408: <li><a href="errata43.html#011_sudo">February 22, 2009:
409: sudo(8) may allow a user listed in sudoers to run a command
410: as a different user than their access rule specifies when a Unix
411: group is used in the RunAs portion of the rule.</a>
1.370 djm 412: <li><a href="errata43.html#008_bind">January 15, 2009:
413: named(8) suffered from a similar logic error that may allow
414: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 415: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 416: OpenSSL suffered from some logic errors that allowed bypass
417: of DSA/ECDSA certificate validation.</a>
1.382 tobias 418: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 419: The Neighbor Discovery Protocol (ndp) did not correctly verify
420: neighbor solicitation requests maybe allowing a nearby attacker
421: to intercept traffic.</a>
1.362 brad 422: <li><a href="errata43.html#004_bind">July 23, 2008:
423: A vulnerability has been found with BIND.</a>
1.361 brad 424: <li><a href="errata43.html#003_xorg">July 15, 2008:
425: Multiple vulnerabilities in X.Org.</a>
1.359 brad 426: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 427: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 428: <li><a href="errata43.html#001_openssh">March 30, 2008:
429: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 430: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 431: </ul>
432:
433: <li>
1.348 merdely 434: <a name="42"></a>
435: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
436: These are the OpenBSD 4.2 advisories -- all these problems are solved
437: in <a href=anoncvs.html>OpenBSD current</a> and the
438: <a href=stable.html>patch branch</a>.
439:
440: <p>
441: <ul>
1.364 tobias 442: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 443: The Neighbor Discovery Protocol (ndp) did not correctly verify
444: neighbor solicitation requests maybe allowing a nearby attacker
445: to intercept traffic.</a>
1.362 brad 446: <li><a href="errata42.html#013_bind">July 23, 2008:
447: A vulnerability has been found with BIND.</a>
1.361 brad 448: <li><a href="errata42.html#012_xorg2">July 15, 2008:
449: Multiple vulnerabilities in X.Org.</a>
1.359 brad 450: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 451: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 452: <li><a href="errata42.html#010_openssh">March 30, 2008:
453: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 454: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 455: <li><a href="errata42.html#009_ppp">March 7, 2008:
456: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 457: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
458: Multiple vulnerabilities in X.Org.</a>
1.351 okan 459: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
460: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 461: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 462: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 463: </ul>
464:
465: <li>
1.346 matthieu 466: <a name="41"></a>
467:
468: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
469: These are the OpenBSD 4.1 advisories -- all these problems are solved
470: in <a href=anoncvs.html>OpenBSD current</a> and the
471: <a href=stable.html>patch branch</a>.
472:
473: <p>
474: <ul>
1.359 brad 475: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 476: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 477: <li><a href="errata41.html#015_openssh">March 30, 2008:
478: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 479: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 480: <li><a href="errata41.html#014_ppp">March 7, 2008:
481: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 482: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
483: Multiple vulnerabilities in X.Org.</a>
484: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
485: The SSL_get_shared_ciphers() function in OpenSSL contains
486: an off-by-one overflow.</a>
1.350 deraadt 487: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 488: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 489: <li><a href="errata41.html#009_file">Jul 9, 2007:
490: Fix possible heap overflow in file(1).</a>
1.346 matthieu 491: <li><a href="errata41.html#005_route6">Apr 27, 2007:
492: IPv6 type 0 route headers can be used to mount a DoS attack
493: against hosts and networks.</a>
494: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
495: Multiple vulnerabilities in X.Org.</a>
496: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
497: Incorrect mbuf handling for ICMP6 packets.</a>
498: </ul>
499:
500: <li>
1.334 brad 501: <a name="40"></a>
502: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
503: These are the OpenBSD 4.0 advisories -- all these problems are solved
504: in <a href=anoncvs.html>OpenBSD current</a> and the
505: <a href=stable.html>patch branch</a>.
506:
507: <p>
508: <ul>
1.382 tobias 509: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
510: The SSL_get_shared_ciphers() function in OpenSSL contains an
511: off-by-one overflow.</a>
1.350 deraadt 512: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 513: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 514: <li><a href="errata40.html#015_file">Jul 9, 2007:
515: Fix possible heap overflow in file(1).</a>
1.343 deraadt 516: <li><a href="errata40.html#012_route6">Apr 23, 2007:
517: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 518: against hosts and networks.</a>
1.342 mbalmer 519: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
520: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 521: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
522: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 523: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 524: Insufficient validation in vga(4) may allow an attacker to gain
525: root privileges on some i386 systems.</a>
1.339 deraadt 526: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 527: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 528: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 529: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
530: found by Chris Evans.</a>
1.339 deraadt 531: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 532: Several problems have been found in OpenSSL.</a>
1.339 deraadt 533: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 534: httpd(8) does not sanitize the Expect header from an HTTP request
535: when it is reflected back in an error message, which might allow
536: cross-site scripting (XSS) style attacks.</a>
537: </ul>
538:
539: <li>
1.321 brad 540: <a name="39"></a>
541:
542: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
543: These are the OpenBSD 3.9 advisories -- all these problems are solved
544: in <a href=anoncvs.html>OpenBSD current</a> and the
545: <a href=stable.html>patch branch</a>.
546:
547: <p>
548: <ul>
1.343 deraadt 549: <li><a href="errata39.html#022_route6">Apr 23, 2007:
550: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 551: against hosts and networks.</a>
1.342 mbalmer 552: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
553: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 554: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
555: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 556: <li><a href="errata39.html#agp">Jan 3, 2007:
557: Insufficient validation in vga(4) may allow an attacker to gain
558: root privileges on some i386 systems.</a>
1.336 brad 559: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 560: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 561: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 562: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 563: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 564: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 565: found by Chris Evans.</a>
1.333 deraadt 566: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 567: Several problems have been found in OpenSSL.</a>
1.333 deraadt 568: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 569: httpd(8) does not sanitize the Expect header from an HTTP request
570: when it is reflected back in an error message, which might allow
571: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 572: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 573: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
574: possible for an attacker to construct an invalid signature which
575: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 576: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 577: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 578: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 579: Due to the failure to correctly validate LCP configuration option
580: lengths, it is possible for an attacker to send LCP packets via an
581: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 582: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 583: A problem in isakmpd(8) caused IPsec to run partly without replay
584: protection.</a>
1.333 deraadt 585: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 586: It is possible to cause the kernel to panic when more than the default
587: number of sempahores have been allocated.</a>
1.333 deraadt 588: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 589: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
590: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
591: option.</a>
1.333 deraadt 592: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 593: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 594: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 595: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
596: overflow.</a>
1.333 deraadt 597: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 598: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 599: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 600: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 601: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 602: A race condition has been reported to exist in the handling by sendmail
603: of asynchronous signals.</a>
604: </ul>
605:
606: <li>
1.318 deraadt 607: <a name="38"></a>
608:
609: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
610: These are the OpenBSD 3.8 advisories -- all these problems are solved
611: in <a href=anoncvs.html>OpenBSD current</a> and the
612: <a href=stable.html>patch branch</a>.
613:
614: <p>
615: <ul>
1.332 brad 616: <li><a href="errata38.html#ssh2">Oct 12, 2006:
617: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 618: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 619: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 620: found by Chris Evans.</a>
621: <li><a href="errata38.html#openssl2">Oct 7, 2006:
622: Several problems have been found in OpenSSL.</a>
623: <li><a href="errata38.html#httpd2">Oct 7, 2006:
624: httpd(8) does not sanitize the Expect header from an HTTP request
625: when it is reflected back in an error message, which might allow
626: cross-site scripting (XSS) style attacks.</a>
1.329 brad 627: <li><a href="errata38.html#openssl">Sep 8, 2006:
628: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
629: possible for an attacker to construct an invalid signature which
630: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 631: <li><a href="errata38.html#bind">Sep 8, 2006:
632: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 633: <li><a href="errata38.html#sppp">Sep 2, 2006:
634: Due to the failure to correctly validate LCP configuration option
635: lengths, it is possible for an attacker to send LCP packets via an
636: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 637: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
638: A problem in isakmpd(8) caused IPsec to run partly without replay
639: protection.</a>
640: <li><a href="errata38.html#sem">Aug 25, 2006:
641: It is possible to cause the kernel to panic when more than the default
642: number of sempahores have been allocated.</a>
643: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
644: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
645: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
646: option.</a>
647: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
648: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 649: <li><a href="errata38.html#httpd">Jul 30, 2006:
650: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
651: overflow.</a>
1.324 brad 652: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
653: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 654: <li><a href="errata38.html#xorg">May 2, 2006:
655: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 656: <li><a href="errata38.html#sendmail">Mar 25, 2006:
657: A race condition has been reported to exist in the handling by sendmail
658: of asynchronous signals.</a>
659: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 660: Josh Bressers has reported a weakness in OpenSSH caused due to the
661: insecure use of the system(3) function in scp(1) when performing copy
662: operations using filenames that are supplied by the user from the
663: command line.</a>
1.321 brad 664: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 665: Do not allow users to trick suid programs into re-opening files via
666: /dev/fd.</a>
1.321 brad 667: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 668: A buffer overflow has been found in the Perl interpreter with the
669: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 670: </ul>
671:
672: <li>
1.312 david 673: <a name="37"></a>
674:
675: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
676: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 677: in <a href="anoncvs.html">OpenBSD current</a>. The
678: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
679: you should update your machine.
1.312 david 680:
681: <p>
682: <ul>
1.322 brad 683: <li><a href="errata37.html#xorg">May 2, 2006:
684: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 685: <li><a href="errata37.html#sendmail">Mar 25, 2006:
686: A race condition has been reported to exist in the handling by sendmail
687: of asynchronous signals.</a>
1.320 brad 688: <li><a href="errata37.html#ssh">Feb 12, 2006:
689: Josh Bressers has reported a weakness in OpenSSH caused due to the
690: insecure use of the system(3) function in scp(1) when performing copy
691: operations using filenames that are supplied by the user from the
692: command line.</a>
1.319 brad 693: <li><a href="errata37.html#fd">Jan 5, 2006:
694: Do not allow users to trick suid programs into re-opening files via
695: /dev/fd.</a>
696: <li><a href="errata37.html#perl">Jan 5, 2006:
697: A buffer overflow has been found in the Perl interpreter with the
698: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 699: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 700: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 701: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 702: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 703: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 704: Fix a race condition in sudo(8) that could allow a user
1.315 millert 705: to run arbitrary commands.</a>
1.318 deraadt 706: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 707: Fix a buffer overflow, memory leaks, and NULL pointer
708: dereference in cvs(1).</a>
1.312 david 709: </ul>
710:
711: <li>
1.301 miod 712: <a name="36"></a>
713:
714: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
715: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 716: in <a href="anoncvs.html">OpenBSD current</a>. The
717: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
718: you should update your machine.
1.301 miod 719:
720: <p>
1.302 markus 721: <ul>
1.317 millert 722: <li><a href="errata36.html#libz2">Jul 21, 2005:
723: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 724: <li><a href="errata36.html#libz">Jul 6, 2005:
725: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 726: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 727: Fix a race condition in sudo(8) that could allow a user
1.315 millert 728: to run arbitrary commands.</a>
1.311 deraadt 729: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 730: Fix a buffer overflow, memory leaks, and NULL pointer
731: dereference in cvs(1).</a>
1.311 deraadt 732: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 733: Due to buffer overflows in telnet(1), a malicious
734: server or man-in-the-middle attack could allow
735: execution of arbitrary code with the privileges of
736: the user invoking telnet(1).</a>
1.311 deraadt 737: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 738: More stringent checking should be done in the copy(9)
739: functions to prevent their misuse.</a>
1.311 deraadt 740: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 741: More stringent checking should be done in the copy(9)
742: functions to prevent their misuse.</a>
1.311 deraadt 743: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 744: httpd(8)'s mod_include module fails to properly validate
745: the length of user supplied tag strings prior to copying
1.305 brad 746: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 747: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 748: On systems running isakmpd(8) it is possible for a local
749: user to cause kernel memory corruption and system panic by
1.303 markus 750: setting ipsec(4) credentials on a socket.</a>
1.302 markus 751: </ul>
1.301 miod 752:
753: <li>
1.288 matthieu 754: <a name="35"></a>
1.279 deraadt 755:
1.294 david 756: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 757: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 758: in <a href="anoncvs.html">OpenBSD current</a>. The
759: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
760: you should update your machine.
1.279 deraadt 761:
762: <p>
763: <ul>
1.310 brad 764: <li><a href="errata35.html#cvs4">Apr 28, 2005:
765: Fix a buffer overflow, memory leaks, and NULL pointer
766: dereference in cvs(1).</a>
1.309 brad 767: <li><a href="errata35.html#telnet">Mar 30, 2005:
768: Due to buffer overflows in telnet(1), a malicious
769: server or man-in-the-middle attack could allow
770: execution of arbitrary code with the privileges of
771: the user invoking telnet(1).</a>
1.308 brad 772: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 773: More stringent checking should be done in the copy(9)
774: functions to prevent their misuse.</a>
1.306 brad 775: <li><a href="errata35.html#locore">Feb 28, 2005:
776: More stringent checking should be done in the copy(9)
777: functions to prevent their misuse.</a>
1.304 brad 778: <li><a href="errata35.html#httpd3">Jan 12, 2005:
779: httpd(8)'s mod_include module fails to properly validate
780: the length of user supplied tag strings prior to copying
1.305 brad 781: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 782: <li><a href="errata35.html#pfkey">Dec 14, 2004:
783: On systems running isakmpd(8) it is possible for a local
784: user to cause kernel memory corruption and system panic by
1.303 markus 785: setting ipsec(4) credentials on a socket.</a>
1.301 miod 786: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 787: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 788: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 789: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 790: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 791: httpd(8)'s mod_rewrite module can be made to write one zero byte in
792: an arbitrary memory position outside of a char array, causing a DoS
793: or possibly buffer overflows.</a>
1.301 miod 794: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 795: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 796: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 797: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 798: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 799: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 800: Multiple remote vulnerabilities have been found in the cvs(1)
801: server which can be used by CVS clients to crash or execute
1.293 brad 802: arbitrary code on the server.</a>
1.301 miod 803: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 804: kdc(8) performs inadequate checking of request fields, leading
805: to the possibility of principal impersonation from other
806: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 807: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 808: xdm(1) ignores the requestPort resource and creates a
1.293 brad 809: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 810: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 811: A buffer overflow in the cvs(1) server has been found,
812: which can be used by CVS clients to execute arbitrary code on
1.293 brad 813: the server.</a>
1.301 miod 814: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 815: Integer overflow problems were found in procfs, allowing
1.293 brad 816: reading of arbitrary kernel memory.</a>
1.301 miod 817: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 818: Pathname validation problems have been found in cvs(1),
819: allowing clients and servers access to files outside the
1.293 brad 820: repository or local CVS tree.</a>
1.279 deraadt 821: </ul>
822:
823: <p>
824: <li>
1.288 matthieu 825: <a name="34"></a>
1.261 david 826:
1.294 david 827: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 828: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 829: in <a href="anoncvs.html">OpenBSD current</a>. The
830: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
831: you should update your machine.
1.261 david 832: <p>
833: <ul>
1.302 markus 834: <li><a href="errata34.html#pfkey">Dec 14, 2004:
835: On systems running isakmpd(8) it is possible for a local
836: user to cause kernel memory corruption and system panic by
1.303 markus 837: setting ipsec(4) credentials on a socket.</a>
1.298 brad 838: <li><a href="errata34.html#xpm">Sep 16, 2004:
839: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 840: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
841: httpd(8)'s mod_rewrite module can be made to write one zero byte in
842: an arbitrary memory position outside of a char array, causing a DoS
843: or possibly buffer overflows.</a>
1.294 david 844: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 845: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 846: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 847: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 848: an attacker can delete IPsec tunnels at will.</a>
1.294 david 849: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 850: Multiple remote vulnerabilities have been found in the cvs(1)
851: server which can be used by CVS clients to crash or execute
1.293 brad 852: arbitrary code on the server.</a>
1.294 david 853: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 854: kdc(8) performs inadequate checking of request fields, leading
855: to the possibility of principal impersonation from other
856: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 857: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 858: A buffer overflow in the cvs(1) server has been found,
859: which can be used by CVS clients to execute arbitrary code on
860: the server.</a>
1.294 david 861: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 862: Integer overflow problems were found in procfs, allowing
863: reading of arbitrary kernel memory.</a>
1.294 david 864: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 865: Pathname validation problems have been found in cvs(1),
866: allowing clients and servers access to files outside the
867: repository or local CVS tree.</a>
1.294 david 868: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 869: A missing check for a NULL-pointer dereference may allow a
1.281 otto 870: remote attacker to crash applications using OpenSSL.</a>
1.294 david 871: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 872: Defects in the payload validation and processing functions of
873: isakmpd have been discovered. An attacker could send malformed
874: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 875: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 876: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
877: access module, using IP addresses without a netmask on big endian
878: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 879: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 880: An IPv6 MTU handling problem exists that could be used by an
881: attacker to cause a denial of service attack.</a>
1.294 david 882: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 883: A reference counting bug in shmat(2) could be used to write to
884: kernel memory under certain circumstances.</a>
1.294 david 885: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 886: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 887: by Thomas Walpuski.</a>
1.294 david 888: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 889: It may be possible for a local user to overrun the stack in
890: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 891: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 892: The use of certain ASN.1 encodings or malformed public keys may
893: allow an attacker to mount a denial of service attack against
894: applications linked with ssl(3).</a>
1.261 david 895: </ul>
896:
897: <li>
1.288 matthieu 898: <a name="33"></a>
1.246 deraadt 899:
1.294 david 900: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 901: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 902: in <a href="anoncvs.html">OpenBSD current</a>. The
903: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 904: you should update your machine.
1.246 deraadt 905: <p>
906: <ul>
1.294 david 907: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 908: Pathname validation problems have been found in cvs(1),
909: allowing clients and servers access to files outside the
910: repository or local CVS tree.</a>
1.294 david 911: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 912: A missing check for a NULL-pointer dereference may allow a
1.281 otto 913: remote attacker to crash applications using OpenSSL.</a>
1.294 david 914: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 915: Defects in the payload validation and processing functions of
916: isakmpd have been discovered. An attacker could send malformed
917: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 918: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 919: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
920: access module, using IP addresses without a netmask on big endian
921: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 922: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 923: An IPv6 MTU handling problem exists that could be used by an
924: attacker to cause a denial of service attack.</a>
1.294 david 925: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 926: A reference counting bug in shmat(2) could be used to write to
927: kernel memory under certain circumstances.</a>
1.294 david 928: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 929: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 930: by Thomas Walpuski.</a>
1.294 david 931: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 932: It may be possible for a local user to execute arbitrary code
933: resulting in escalation of privileges due to a stack overrun
934: in compat_ibcs2(8).</a>
1.294 david 935: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 936: The use of certain ASN.1 encodings or malformed public keys may
937: allow an attacker to mount a denial of service attack against
938: applications linked with ssl(3).</a>
1.294 david 939: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 940: Access of freed memory in pf(4) could be used to
1.260 margarid 941: remotely panic a machine using scrub rules.</a>
1.294 david 942: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 943: A buffer overflow in the address parsing in
944: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 945: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 946: OpenSSH versions prior to 3.7 contains a buffer management error
947: that is potentially exploitable.</a>
1.294 david 948: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 949: Root may be able to reduce the security level by taking advantage of
950: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 951: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 952: An improper bounds check in the kernel may allow a local user
953: to panic the kernel.</a>
1.294 david 954: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 955: An off-by-one error exists in the C library function realpath(3)
956: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 957: </ul>
958:
1.265 miod 959:
1.247 david 960: <p>
1.246 deraadt 961: <li>
1.288 matthieu 962: <a name="32"></a>
1.224 deraadt 963:
1.294 david 964: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 965: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 966: in <a href="anoncvs.html">OpenBSD current</a>. The
967: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 968: you should update your machine.
1.224 deraadt 969: <p>
970: <ul>
1.294 david 971: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 972: The use of certain ASN.1 encodings or malformed public keys may
973: allow an attacker to mount a denial of service attack against
974: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 975: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 976: Access of freed memory in pf(4) could be used to
1.260 margarid 977: remotely panic a machine using scrub rules.</a>
1.294 david 978: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 979: A buffer overflow in the address parsing in
980: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 981: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 982: OpenSSH versions prior to 3.7 contains a buffer management error
983: that is potentially exploitable.</a>
1.294 david 984: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 985: Fix for a potential security issue in
986: sendmail(8) with respect to DNS maps.</a>
1.294 david 987: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 988: An off-by-one error exists in the C library function realpath(3)
989: may allow an attacker to gain escalated privileges.</a>
1.294 david 990: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 991: A buffer overflow in the address parsing in
992: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 993: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 994: A cryptographic weaknesses in the Kerberos v4 protocol can be
995: exploited on Kerberos v5 as well.</a>
1.294 david 996: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 997: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 998: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 999: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1000: Various SSL and TLS operations in OpenSSL are vulnerable to
1001: timing attacks.</a>
1.294 david 1002: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1003: A buffer overflow in lprm(1) may allow an attacker to elevate
1004: privileges to user daemon.</a>.
1.294 david 1005: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1006: A buffer overflow in the envelope comments processing in
1007: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1008: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1009: httpd(8) leaks file inode numbers via ETag header as well as
1010: child PIDs in multipart MIME boundary generation. This could
1011: lead, for example, to NFS exploitation because it uses inode
1012: numbers as part of the file handle.</a>
1.294 david 1013: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1014: In ssl(8) an information leak can occur via timing by performing
1015: a MAC computation even if incorrect block cipher padding has
1016: been found, this is a countermeasure. Also, check for negative
1017: sizes, in allocation routines.</a>
1.294 david 1018: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1019: A double free exists in cvs(1) that could lead to privilege
1020: escalation for cvs configurations where the cvs command is
1.233 margarid 1021: run as a privileged user.</a>
1.294 david 1022: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1023: A buffer overflow exists in named(8) that could lead to a
1024: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1025: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1026: A logic error in the pool kernel memory allocator could cause
1027: memory corruption in low-memory situations, causing the system
1028: to crash.</a>
1.294 david 1029: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1030: An attacker can bypass smrsh(8)'s restrictions and execute
1031: arbitrary commands with the privileges of his own account.</a>
1.294 david 1032: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1033: Network bridges running pf with scrubbing enabled could cause
1034: mbuf corruption, causing the system to crash.</a>
1.294 david 1035: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1036: A buffer overflow can occur in the kadmind(8) daemon, leading
1037: to possible remote crash or exploit.</a>
1.224 deraadt 1038: </ul>
1039:
1.227 miod 1040: <p>
1041: <li>
1.288 matthieu 1042: <a name="31"></a>
1.203 deraadt 1043:
1.294 david 1044: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1045: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1046: in <a href="anoncvs.html">OpenBSD current</a>. The
1047: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1048: you should update your machine.
1.203 deraadt 1049:
1050: <p>
1051: <ul>
1.294 david 1052: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1053: A buffer overflow in the address parsing in
1054: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1055: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1056: A cryptographic weaknesses in the Kerberos v4 protocol can be
1057: exploited on Kerberos v5 as well.</a>
1.294 david 1058: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1059: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1060: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1061: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1062: Various SSL and TLS operations in OpenSSL are vulnerable to
1063: timing attacks.</a>
1.294 david 1064: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1065: A buffer overflow in lprm(1) may allow an attacker to gain
1066: root privileges.</a>
1.294 david 1067: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1068: A buffer overflow in the envelope comments processing in
1069: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1070: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1071: In ssl(8) an information leak can occur via timing by performing
1072: a MAC computation even if incorrect block cipher padding has
1073: been found, this is a countermeasure. Also, check for negative
1074: sizes, in allocation routines.</a>
1.294 david 1075: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1076: A double free exists in cvs(1) that could lead to privilege
1077: escalation for cvs configurations where the cvs command is
1.294 david 1078: run as a privileged user</a>.
1079: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1080: A buffer overflow exists in named(8) that could lead to a
1081: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1082: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1083: Incorrect argument checking in the getitimer(2) system call
1084: may allow an attacker to crash the system.</a>
1.294 david 1085: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1086: An attacker can bypass smrsh(8)'s restrictions and execute
1087: arbitrary commands with the privileges of his own account.</a>
1.294 david 1088: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1089: A buffer overflow can occur in the kadmind(8) daemon, leading
1090: to possible remote crash or exploit.</a>
1.294 david 1091: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1092: Incorrect argument checking in the setitimer(2) system call
1093: may allow an attacker to write to kernel memory.</a>
1.294 david 1094: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1095: An insufficient boundary check in the select system call
1.220 miod 1096: allows an attacker to overwrite kernel memory and execute arbitrary code
1097: in kernel context.</a>
1.294 david 1098: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1099: Several remote buffer overflows can occur in the SSL2 server and SSL3
1100: client of the ssl(8) library, as in the ASN.1 parser code in the
1101: crypto(3) library, all of them being potentially remotely
1102: exploitable.</a>
1.294 david 1103: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1104: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1105: possible remote crash.</a>
1.294 david 1106: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1107: A race condition exists in the pppd(8) daemon which may cause it to
1108: alter the file permissions of an arbitrary file.</a>
1.294 david 1109: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1110: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1111: crash.</a>
1.294 david 1112: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1113: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1114: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1115: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1116: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1117: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1118: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1119: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1120: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1121: input validation error that can result in an integer overflow and
1122: privilege escalation.</a>
1.294 david 1123: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1124: A buffer overflow can occur during the interpretation of chunked
1125: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1126: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1127: Under certain conditions, on systems using YP with netgroups
1128: in the password database, it is possible that sshd(8) does
1129: ACL checks for the requested user name but uses the password
1130: database entry of a different user for authentication. This
1131: means that denied users might authenticate successfully
1132: while permitted users could be locked out.</a>
1.294 david 1133: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1134: A race condition exists that could defeat the kernel's
1135: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1136: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1137: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1138: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1139: A local user can gain super-user privileges due to a buffer
1140: overflow in sshd(8) if AFS has been configured on the system
1141: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1142: in the sshd_config file.</a>
1.203 deraadt 1143: </ul>
1144:
1.235 miod 1145: <p>
1.203 deraadt 1146: <li>
1.288 matthieu 1147: <a name="30"></a>
1.187 deraadt 1148:
1.294 david 1149: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1150: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1151: in <a href="anoncvs.html">OpenBSD current</a>. The
1152: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1153: you should update your machine.
1.187 deraadt 1154:
1155: <p>
1156: <ul>
1.294 david 1157: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1158: A buffer overflow exists in named(8) that could lead to a
1159: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1160: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1161: Incorrect argument checking in the getitimer(2) system call
1162: may allow an attacker to crash the system.</a>
1.294 david 1163: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1164: An attacker can bypass smrsh(8)'s restrictions and execute
1165: arbitrary commands with the privileges of his own account.</a>
1.294 david 1166: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1167: A buffer overflow can occur in the kadmind(8) daemon, leading
1168: to possible remote crash or exploit.</a>
1.294 david 1169: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1170: Incorrect argument checking in the setitimer(2) system call
1171: may allow an attacker to write to kernel memory.</a>
1.294 david 1172: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1173: An insufficient boundary check in the select and poll system calls
1174: allows an attacker to overwrite kernel memory and execute arbitrary code
1175: in kernel context.</a>
1.294 david 1176: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1177: Several remote buffer overflows can occur in the SSL2 server and SSL3
1178: client of the ssl(8) library, as in the ASN.1 parser code in the
1179: crypto(3) library, all of them being potentially remotely
1180: exploitable.</a>
1.294 david 1181: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1182: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1183: possible remote crash.</a>
1.294 david 1184: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1185: A race condition exists in the pppd(8) daemon which may cause it to
1186: alter the file permissions of an arbitrary file.</a>
1.294 david 1187: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1188: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1189: crash.</a>
1.294 david 1190: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1191: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1192: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1193: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1194: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1195: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1196: input validation error that can result in an integer overflow and
1197: privilege escalation.</a>
1.294 david 1198: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1199: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1200: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1201: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1202: A buffer overflow can occur during the interpretation of chunked
1203: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1204: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1205: A race condition exists that could defeat the kernel's
1206: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1207: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1208: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1209: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1210: A local user can gain super-user privileges due to a buffer
1211: overflow in sshd(8) if AFS has been configured on the system
1212: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1213: in the sshd_config file.</a>
1.294 david 1214: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1215: The mail(1) was interpreting tilde escapes even when invoked
1216: in non-interactive mode. As mail(1) is called as root from cron,
1217: this can lead to a local root compromise.</a>
1.294 david 1218: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1219: Under certain conditions, on systems using YP with netgroups in
1220: the password database, it is possible for the rexecd(8) and rshd(8)
1221: daemons to execute a shell from a password database entry for a
1222: different user. Similarly, atrun(8) may change to the wrong
1223: home directory when running jobs.</a>
1.294 david 1224: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1225: A potential double free() exists in the zlib library;
1226: this is not exploitable on OpenBSD.
1227: The kernel also contains a copy of zlib; it is not
1228: currently known if the kernel zlib is exploitable.</a>
1.294 david 1229: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1230: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1231: may allow a local user to gain super-user privileges.</a>
1.294 david 1232: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1233: A race condition between the ptrace(2) and execve(2) system calls
1234: allows an attacker to modify the memory contents of suid/sgid
1235: processes which could lead to compromise of the super-user account.</a>
1.294 david 1236: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1237: There is a security hole in sudo(8) that can be exploited
1238: when the Postfix sendmail replacement is installed that may
1239: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1240: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1241: An attacker can trick a machine running the lpd daemon into
1242: creating new files in the root directory from a machine with
1243: remote line printer access.</a>
1.294 david 1244: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1245: The vi.recover script can be abused in such a way as
1246: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1247: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1248: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1249: resulting in a crash.</a>
1.294 david 1250: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1251: A security hole that may allow an attacker to partially authenticate
1252: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1253: </ul>
1254:
1255: <p>
1256: <li>
1.288 matthieu 1257: <a name="29"></a>
1.173 deraadt 1258:
1.294 david 1259: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1260: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1261: in <a href="anoncvs.html">OpenBSD current</a>. The
1262: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1263: you should update your machine.
1264:
1.173 deraadt 1265:
1266: <p>
1267: <ul>
1.294 david 1268: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1269: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1270: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1271: A race condition exists that could defeat the kernel's
1272: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1273: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1274: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1275: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1276: A local user can gain super-user privileges due to a buffer
1277: overflow in sshd(8) if AFS has been configured on the system
1278: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1279: in the sshd_config file.</a>
1.294 david 1280: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1281: The mail(1) was interpreting tilde escapes even when invoked
1282: in non-interactive mode. As mail(1) is called as root from cron,
1283: this can lead to a local root compromise.</a>
1.294 david 1284: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1285: A potential double free() exists in the zlib library;
1286: this is not exploitable on OpenBSD.
1287: The kernel also contains a copy of zlib; it is not
1288: currently known if the kernel zlib is exploitable.</a>
1.294 david 1289: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1290: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1291: may allow a local user to gain super-user privileges.</a>
1.294 david 1292: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1293: A race condition between the ptrace(2) and execve(2) system calls
1294: allows an attacker to modify the memory contents of suid/sgid
1295: processes which could lead to compromise of the super-user account.</a>
1.294 david 1296: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1297: There is a security hole in sudo(8) that can be exploited
1298: when the Postfix sendmail replacement is installed that may
1299: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1300: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1301: An attacker can trick a machine running the lpd daemon into
1302: creating new files in the root directory from a machine with
1303: remote line printer access.</a>
1.294 david 1304: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1305: The vi.recover script can be abused in such a way as
1306: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1307: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1308: A security hole exists in uuxqt(8) that may allow an
1309: attacker to gain root privileges.</a>
1.294 david 1310: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1311: A security hole exists in lpd(8) that may allow an
1312: attacker to gain root privileges if lpd is running.</a>
1.294 david 1313: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1314: A security hole exists in sendmail(8) that may allow an
1315: attacker on the local host to gain root privileges.</a>
1.294 david 1316: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1317: A kernel buffer overflow in the NFS code can be used to execute
1318: arbitrary code by users with mount privileges (only root by
1.181 millert 1319: default).</a>
1.294 david 1320: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1321: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1322: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1323: sshd(8) allows users to delete arbitrary files named "cookies"
1324: if X11 forwarding is enabled. X11 forwarding is disabled
1325: by default.</a>
1.294 david 1326: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1327: Programs using the fts routines can be tricked into changing
1328: into the wrong directory.</a>
1.294 david 1329: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1330: Sendmail signal handlers contain unsafe code,
1331: leading to numerous race conditions.</a>
1.173 deraadt 1332: </ul>
1333:
1334: <p>
1335: <li>
1.288 matthieu 1336: <a name="28"></a>
1.152 deraadt 1337:
1.294 david 1338: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1339: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1340: in <a href="anoncvs.html">OpenBSD current</a>. The
1341: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1342: you should update your machine.
1343:
1.152 deraadt 1344:
1345: <p>
1346: <ul>
1.294 david 1347: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1348: A security hole exists in uuxqt(8) that may allow an
1349: attacker to gain root privileges.</a>
1.294 david 1350: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1351: A security hole exists in lpd(8) that may allow an
1352: attacker to gain root privileges if lpd is running.</a>
1.294 david 1353: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1354: A security hole exists in sendmail(8) that may allow an
1355: attacker on the local host to gain root privileges.</a>
1.294 david 1356: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1357: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1358: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1359: Programs using the fts routines can be tricked into changing
1360: into the wrong directory.</a>
1.294 david 1361: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1362: Sendmail signal handlers contain unsafe code,
1363: leading to numerous race conditions.</a>
1.294 david 1364: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1365: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1366: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1367: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1368: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1369: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1370: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1371: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1372: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1373: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1374: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1375: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1376: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1377: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1378: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1379: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1380: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1381: rnd(4) did not use all of its input when written to.</a>
1.294 david 1382: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1383: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1384: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1385: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1386: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1387: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1388: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1389: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1390: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1391: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1392: </ul>
1393:
1394: <p>
1395: <li>
1.288 matthieu 1396: <a name="27"></a>
1.124 deraadt 1397:
1.294 david 1398: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1399: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1400: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1401: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1402:
1403: <p>
1404: <ul>
1.294 david 1405: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1406: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1407: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1408: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1409: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1410: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1411: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1412: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1413: (patch included)</a>
1.294 david 1414: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1415: X11 libraries have 2 potential overflows in xtrans code.
1416: (patch included)</a>
1.294 david 1417: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1418: Apache mod_rewrite and mod_vhost_alias modules could expose files
1419: on the server in certain configurations if used.
1420: (patch included)</a>
1.294 david 1421: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1422: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1423: TERMPATH and TERMCAP environment variables as it should.
1424: (patch included)</a>
1.294 david 1425: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1426: There are printf-style format string bugs in several privileged
1427: programs. (patch included)</a>
1.294 david 1428: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1429: libcurses honored terminal descriptions in the $HOME/.terminfo
1430: directory as well as in the TERMCAP environment variable for
1431: setuid and setgid applications.
1.146 deraadt 1432: (patch included)</a>
1.294 david 1433: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1434: A format string vulnerability exists in talkd(8).
1435: (patch included)</a>
1.294 david 1436: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1437: A format string vulnerability exists in the pw_error() function of the
1438: libutil library, yielding localhost root through chpass(1).
1439: (patch included)</a>
1.294 david 1440: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1441: Bad ESP/AH packets could cause a crash under certain conditions.
1442: (patch included)</a>
1.294 david 1443: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1444: A format string vulnerability (localhost root) exists in xlock(1).
1445: (patch included)</a>
1.294 david 1446: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1447: Various bugs found in X11 libraries have various side effects, almost
1448: completely denial of service in OpenBSD.
1449: (patch included)</a>
1.294 david 1450: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1451: Just like pretty much all the other unix ftp daemons
1452: on the planet, ftpd had a remote root hole in it.
1453: Luckily, ftpd was not enabled by default.
1.137 deraadt 1454: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1455: (patch included)</a>
1.294 david 1456: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1457: Mopd, very rarely used, contained some buffer overflows.
1458: (patch included)</a>
1.294 david 1459: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1460: libedit would check for a <b>.editrc</b> file in the current
1461: directory. Not known to be a real security issue, but a patch
1462: is available anyways.
1463: (patch included)</a>
1.294 david 1464: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1465: A serious bug in dhclient(8) could allow strings from a
1466: malicious dhcp server to be executed in the shell as root.
1467: (patch included)</a>
1.294 david 1468: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1469: A serious bug in isakmpd(8) policy handling wherein
1470: policy verification could be completely bypassed in isakmpd.
1471: (patch included)</a>
1.294 david 1472: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1473: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1474: should not be used, and results in security problems on
1475: other operating systems.</a>
1.294 david 1476: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1477: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1478: (patch included)</a>
1.294 david 1479: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1480: Improper use of ipf <i>keep-state</i> rules can result
1481: in firewall rules being bypassed. (patch included)</a>
1482:
1.124 deraadt 1483: </ul>
1484:
1485: <p>
1486: <li>
1.288 matthieu 1487: <a name="26"></a>
1.119 deraadt 1488:
1.294 david 1489: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1490: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1491: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1492: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1493:
1494: <p>
1495: <ul>
1.294 david 1496: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1497: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1498: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1499: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1500: Improper use of ipf <i>keep-state</i> rules can result
1501: in firewall rules being bypassed. (patch included)</a>
1.294 david 1502: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1503: xlockmore has a bug which a localhost attacker can use to gain
1504: access to the encrypted root password hash (which is normally
1.245 miod 1505: encoded using blowfish</a> (see
1.294 david 1506: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1507: crypt(3)</a>)
1.245 miod 1508: (patch included).
1.294 david 1509: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1510: Systems running with procfs enabled and mounted are
1511: vulnerable to a very tricky exploit. procfs is not
1512: mounted by default.
1513: (patch included).</a>
1.294 david 1514: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1515: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1516: thus exposing the system to a race where the aliases file
1517: did not exist.
1.119 deraadt 1518: (patch included).</a>
1.294 david 1519: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1520: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1521: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1522: A buffer overflow in the RSAREF code included in the
1523: USA version of libssl, is possibly exploitable in
1524: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1525: (patch included).<br></a>
1526: <strong>Update:</strong> Turns out that this was not exploitable
1527: in any of the software included in OpenBSD 2.6.
1.294 david 1528: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1529: Any user could change interface media configurations, resulting in
1530: a localhost denial of service attack.
1.121 deraadt 1531: (patch included).</a>
1.119 deraadt 1532: </ul>
1533:
1534: <p>
1535: <li>
1.288 matthieu 1536: <a name="25"></a>
1.106 deraadt 1537:
1.294 david 1538: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1539: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1540: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1541: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1542:
1.96 deraadt 1543: <p>
1.104 deraadt 1544: <ul>
1.294 david 1545: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1546: In cron(8), make sure argv[] is NULL terminated in the
1547: fake popen() and run sendmail as the user, not as root.
1548: (patch included).</a>
1.294 david 1549: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1550: filesystems had an overrun in their handling of uio_offset
1551: in their readdir() routines. (These filesystems are not
1552: enabled by default). (patch included).</a>
1.294 david 1553: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1554: when we execve() a new process. (patch included).</a>
1.294 david 1555: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1556: been handled by IPsec may be transmitted as cleartext.
1557: PF_KEY SA expirations may leak kernel resources.
1558: (patch included).</a>
1.294 david 1559: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1560: motd re-writing and change the find(1) to use -execdir
1561: (patch included).</a>
1.294 david 1562: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1563: users to chflags(2) or fchflags(2) on character or block devices
1564: which they may currently be the owner of (patch included).</a>
1.294 david 1565: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1566: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1567: </ul>
1568:
1.106 deraadt 1569: <p>
1570: <li>
1.288 matthieu 1571: <a name="24"></a>
1.235 miod 1572:
1.294 david 1573: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1574: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1575: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1576: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1577:
1.96 deraadt 1578: <p>
1.75 deraadt 1579: <ul>
1.294 david 1580: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1581: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1582: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1583: another kernel crash case caused by the <strong>crashme</strong>
1584: program (patch included).</a>
1.294 david 1585: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1586: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1587: (patch included).</a>
1.294 david 1588: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1589: existed in ping(8). (patch included).</a>
1.294 david 1590: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1591: the ipq, which could permit an attacker to cause a crash.
1592: (patch included).</a>
1.294 david 1593: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1594: kernel between accept(2) and select(2) could permit an attacker
1595: to hang sockets from remote.
1596: (patch included).</a>
1.294 david 1597: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1598: bog the machine excessively and cause problems.
1599: (patch included).</a>
1.294 david 1600: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1601: DDB interacted to possibly cause a crash.
1602: (patch included).</a>
1.294 david 1603: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1604: (patch included).</a>
1.294 david 1605: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1606: problem in bootpd(8). (patch included).</a>
1.294 david 1607: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1608: exploitable problem relating to environment variables in termcap
1609: and curses. (patch included).</a>
1.294 david 1610: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1611: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1612: </ul>
1613:
1.106 deraadt 1614: <p>
1615: <li>
1.288 matthieu 1616: <a name="23"></a>
1.235 miod 1617:
1.294 david 1618: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1619: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1620: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1621: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1622:
1.96 deraadt 1623: <p>
1.53 matthieu 1624: <ul>
1.294 david 1625: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1626: problem in bootpd(8). (patch included).</a>
1.294 david 1627: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1628: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1629: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1630: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1631: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1632: chpass(1) has a file descriptor leak which allows an
1633: attacker to modify /etc/master.passwd.</a>
1.294 david 1634: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1635: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1636: should not be executed with fd slots 0, 1, or 2 free.
1637: (patch included).</a>
1.294 david 1638: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1639: libraries (patches included).</a>
1.294 david 1640: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1641: processes too permissive (4th revision patch included).</a>
1.294 david 1642: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1643: of immutable and append-only file flags. (patch included).</a>
1.294 david 1644: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1645: if IPSEC is enabled (patch included).</a>
1.294 david 1646: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1647: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1648: </ul>
1.9 deraadt 1649:
1.106 deraadt 1650: <p>
1651: <li>
1.288 matthieu 1652: <a name="22"></a>
1.235 miod 1653:
1.294 david 1654: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1655: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1656: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1657: still exist in other operating systems. (The supplied patches are for
1658: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1659:
1.96 deraadt 1660: <p>
1.9 deraadt 1661: <ul>
1.294 david 1662: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1663: packets if IPSEC is enabled (patch included).</a>
1.294 david 1664: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1665: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1666: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1667: (patch included).</a>
1.294 david 1668: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1669: (patch included).</a>
1.294 david 1670: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1671: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1672: (patch included).</a>
1.294 david 1673: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1674: export (patch included).</a>
1.112 philen 1675: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1676: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1677: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1678: Acceptance.</a>
1.294 david 1679: A patch is available <a href="errata22.html#sourceroute">here</a>.
1680: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1681: flaw (patch included).</a>
1.294 david 1682: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1683: </ul>
1684:
1.106 deraadt 1685: <p>
1686: <li>
1.288 matthieu 1687: <a name="21"></a>
1.235 miod 1688:
1.294 david 1689: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1690: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1691: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1692: exist in other operating systems. (If you are running OpenBSD 2.1, we
1693: would strongly recommend an upgrade to the newest release, as this
1694: patch list only attempts at fixing the most important security
1695: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1696: security problems. Many of those problems were solved in ways which
1697: make it hard for us to provide patches).
1698:
1.96 deraadt 1699: <p>
1.52 deraadt 1700: <ul>
1.112 philen 1701: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1702: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1703: (patch included)</a>
1.112 philen 1704: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1705: </ul>
1.51 deraadt 1706:
1.106 deraadt 1707: <p>
1708: <li>
1.288 matthieu 1709: <a name="20"></a>
1.235 miod 1710:
1.294 david 1711: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1712: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1713: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1714: exist in other operating systems. (If you are running OpenBSD 2.0, we
1715: commend you for being there back in the old days!, but you're really
1716: missing out if you don't install a new version!)
1717:
1718: <p>
1719: <ul>
1.112 philen 1720: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1721: resolver (patch included)</a>
1722: <li>Many others... if people can hunt them down, please let me know
1723: and we'll put them up here.
1724: </ul>
1.51 deraadt 1725: <p>
1.106 deraadt 1726:
1.288 matthieu 1727: <a name="watching"></a>
1.294 david 1728: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1729:
1.21 deraadt 1730: Since we take a proactive stance with security, we are continually
1731: finding and fixing new security problems. Not all of these problems
1.80 espie 1732: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1733: confirmed to be exploitable; many simple bugs we fix do turn out to
1734: have security consequences we could not predict. We do not have the
1735: time resources to make these changes available in the above format.<p>
1.21 deraadt 1736:
1737: Thus there are usually minor security fixes in the current source code
1738: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1739: guarantee that these problems are of minimal impact and unproven
1.44 ian 1740: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1741: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1742:
1.45 deraadt 1743: People who are really concerned with security can do a number of
1744: things:<p>
1.21 deraadt 1745:
1746: <ul>
1747: <li>If you understand security issues, watch our
1.294 david 1748: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1749: eye out for things which appear security related. Since
1.21 deraadt 1750: exploitability is not proven for many of the fixes we make,
1751: do not expect the relevant commit message to say "SECURITY FIX!".
1752: If a problem is proven and serious, a patch will be available
1753: here very shortly after.
1.161 horacio 1754: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1755: security-announce mailing list</a> which will notify you for every
1.186 ian 1756: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1757: and instruct you on how to patch the problem.
1.21 deraadt 1758: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1759: complete system build from time to time (read /usr/src/Makefile
1760: carefully). Users can make the assumption that the current
1761: source tree always has stronger security than the previous release.
1.45 deraadt 1762: However, building your own system from source code is not trivial;
1.265 miod 1763: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1764: transition between major releases.
1.115 ericj 1765: <li>Install a binary snapshot for your
1.80 espie 1766: architecture, which are made available fairly often. For
1.29 deraadt 1767: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1768: </ul>
1769:
1.9 deraadt 1770: <p>
1.288 matthieu 1771: <a name="reporting"></a>
1.294 david 1772: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1773:
1.5 deraadt 1774: <p> If you find a new security problem, you can mail it to
1.294 david 1775: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1776: <br>
1.5 deraadt 1777: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1778: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1779:
1.107 deraadt 1780: <p>
1.288 matthieu 1781: <a name="papers"></a>
1.294 david 1782: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1783:
1784: A number of papers have been written by OpenBSD team members, about security
1785: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1786: documents are available as follows.<p>
1.107 deraadt 1787:
1788: <ul>
1.113 deraadt 1789: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1790: <a href="events.html#usenix99">Usenix 1999</a>,
1791: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1792: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1793: <a href="papers/bcrypt-paper.ps">paper</a> and
1794: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1795: <p>
1796: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1797: <a href="events.html#usenix99">Usenix 1999</a>,
1798: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1799: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1800: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1801: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1802: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1803: <a href="papers/crypt-paper.ps">paper</a> and
1804: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1805: <p>
1806: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1807: <a href="events.html#usenix99">Usenix 1999</a>,
1808: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1809: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1810: <a href="papers/strlcpy-paper.ps">paper</a> and
1811: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1812: <p>
1.118 deraadt 1813: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1814: <a href="events.html#lisa99">LISA 1999</a>,
1815: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1816: <a href="papers/authgw-paper.ps">paper</a> and
1817: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1818: <p>
1.153 jufi 1819: <li>Encrypting Virtual Memory<br>
1.294 david 1820: <a href="events.html#sec2000">Usenix Security 2000</a>,
1821: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1822: <a href="papers/swapencrypt.ps">paper</a> and
1823: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1824: <p>
1.107 deraadt 1825: </ul>
1.294 david 1826: </ul>
1.106 deraadt 1827:
1.2 deraadt 1828: <hr>
1.294 david 1829: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1830: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1831: <br>
1.387 ! miod 1832: <small>$OpenBSD: security.html,v 1.386 2010/05/21 16:06:05 miod Exp $</small>
1.1 deraadt 1833:
1.24 deraadt 1834: </body>
1835: </html>
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