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1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.387 miod 57: <a href="#34">3.4</a>,
1.388 miod 58: <a href="#35">3.5</a>,
1.365 deraadt 59: <br>
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>,
1.390 sthen 73: <a href="#49">4.9</a>,
74: <a href="#50">5.0</a>,
1.394 lum 75: <a href="#51">5.1</a>,
76: <br>
1.395 sthen 77: <a href="#52">5.2</a>,
78: <a href="#53">5.3</a>.
1.114 philen 79: </td>
80: </tr>
81: </table>
1.56 deraadt 82: <hr>
83:
1.294 david 84: <a name="goals"></a>
1.278 deraadt 85: <ul>
1.294 david 86: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 87:
1.14 deraadt 88: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 89: ONE in the industry for security (if we are not already there). Our
90: open software development model permits us to take a more
91: uncompromising view towards increased security than Sun, SGI, IBM, HP,
92: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 93: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 94: cryptography</a>, we are able to take cryptographic approaches towards
95: fixing security problems.<p>
1.18 deraadt 96:
1.288 matthieu 97: <a name="disclosure"></a>
1.294 david 98: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 99:
1.45 deraadt 100: Like many readers of the
1.196 jufi 101: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 102: BUGTRAQ mailing list</a>,
1.106 deraadt 103: we believe in full disclosure of security problems. In the
104: operating system arena, we were probably the first to embrace
105: the concept. Many vendors, even of free software, still try
106: to hide issues from their users.<p>
107:
108: Security information moves very fast in cracker circles. On the other
109: hand, our experience is that coding and releasing of proper security
110: fixes typically requires about an hour of work -- very fast fix
111: turnaround is possible. Thus we think that full disclosure helps the
112: people who really care about security.<p>
113:
1.288 matthieu 114: <a name="process"></a>
1.294 david 115: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 116:
1.12 deraadt 117: Our security auditing team typically has between six and twelve
1.45 deraadt 118: members who continue to search for and fix new security holes. We
119: have been auditing since the summer of 1996. The process we follow to
120: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 121: every critical software component. We are not so much looking for
122: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 123: years later someone discovers the problem used to be a security
1.106 deraadt 124: issue, and we fixed it because it was just a bug, well, all the
125: better. Flaws have been found in just about every area of the system.
126: Entire new classes of security problems have been found during our
127: audit, and often source code which had been audited earlier needs
128: re-auditing with these new flaws in mind. Code often gets audited
129: multiple times, and by multiple people with different auditing
130: skills.<p>
1.12 deraadt 131:
1.94 deraadt 132: Some members of our security auditing team worked for Secure Networks,
133: the company that made the industry's premier network security scanning
134: software package Ballista (Secure Networks got purchased by Network
135: Associates, Ballista got renamed to Cybercop Scanner, and well...)
136: That company did a lot of security research, and thus fit in well
1.106 deraadt 137: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
138: colours since day 1.<p>
1.31 deraadt 139:
1.34 deraadt 140: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 141: In most cases we have found that the determination of exploitability
142: is not an issue. During our ongoing auditing process we find many
143: bugs, and endeavor to fix them even though exploitability is not
144: proven. We fix the bug, and we move on to find other bugs to fix. We
145: have fixed many simple and obvious careless programming errors in code
146: and only months later discovered that the problems were in fact
147: exploitable. (Or, more likely someone on
1.197 jufi 148: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 149: would report that other operating systems were vulnerable to a `newly
150: discovered problem', and then it would be discovered that OpenBSD had
151: been fixed in a previous release). In other cases we have been saved
152: from full exploitability of complex step-by-step attacks because we
153: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 154: managed such a success is the lpd advisory that Secure Networks put out.
155: <p>
1.29 deraadt 156:
1.288 matthieu 157: <a name="newtech"></a>
1.294 david 158: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 159:
160: As we audit source code, we often invent new ways of solving problems.
161: Sometimes these ideas have been used before in some random application
162: written somewhere, but perhaps not taken to the degree that we do.
163: <p>
164:
165: <ul>
166: <li>strlcpy() and strlcat()
167: <li>Memory protection purify
168: <ul>
169: <li>W^X
170: <li>.rodata segment
171: <li>Guard pages
172: <li>Randomized malloc()
173: <li>Randomized mmap()
174: <li>atexit() and stdio protection
175: </ul>
1.295 otto 176: <li>Privilege separation
1.278 deraadt 177: <li>Privilege revocation
178: <li>Chroot jailing
179: <li>New uids
180: <li>ProPolice
181: <li>... and others
182: </ul>
183: <p>
184:
1.294 david 185: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 186:
1.45 deraadt 187: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 188: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 189: commonplace in security forums like
1.197 jufi 190: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 191:
1.45 deraadt 192: The most intense part of our security auditing happened immediately
1.80 espie 193: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 194: over the last third of 1996 and first half of 1997. Thousands (yes,
195: thousands) of security issues were fixed rapidly over this year-long
196: period; bugs like the standard buffer overflows, protocol
197: implementation weaknesses, information gathering, and filesystem
198: races. Hence most of the security problems that we encountered were
199: fixed before our 2.1 release, and then a far smaller number needed
200: fixing for our 2.2 release. We do not find as many problems anymore,
201: it is simply a case of diminishing returns. Recently the security
202: problems we find and fix tend to be significantly more obscure or
203: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 204:
1.35 deraadt 205: <ul>
1.45 deraadt 206: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 207: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 208: to search for more complicated exploits, so we will too.
209: <li>Finding and fixing subtle flaws in complicated software is
210: a lot of fun.
1.35 deraadt 211: </ul>
1.106 deraadt 212: <p>
1.15 deraadt 213:
1.14 deraadt 214: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 215: to find and fix new security flaws.<p>
1.12 deraadt 216:
1.288 matthieu 217: <a name="default"></a>
1.294 david 218: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 219:
220: To ensure that novice users of OpenBSD do not need to become security
221: experts overnight (a viewpoint which other vendors seem to have), we
222: ship the operating system in a Secure by Default mode. All non-essential
223: services are disabled. As the user/administrator becomes more familiar
224: with the system, he will discover that he has to enable daemons and other
225: parts of the system. During the process of learning how to enable a new
226: service, the novice is more likely to learn of security considerations.<p>
227:
228: This is in stark contrast to the increasing number of systems that
229: ship with NFS, mountd, web servers, and various other services enabled
230: by default, creating instantaneous security problems for their users
231: within minutes after their first install.<p>
232:
1.288 matthieu 233: <a name="crypto"></a>
1.294 david 234: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 235:
236: And of course, since the OpenBSD project is based in Canada, it is possible
237: for us to integrate cryptography. For more information, read the page
1.116 deraadt 238: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 239:
1.294 david 240: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 241:
242: <li>
1.395 sthen 243: <a name="53"></a>
244:
245: <h3><font color="#e00000">OpenBSD 5.3 Security Advisories</font></h3>
246: These are the OpenBSD 5.3 advisories -- all these problems are solved
247: in <a href=anoncvs.html>OpenBSD current</a> and the
248: <a href=stable.html>patch branch</a>.
249:
250: <p>
251: <ul>
252: None yet!
253: </ul>
254:
255: <li>
1.393 sthen 256: <a name="52"></a>
257:
258: <h3><font color="#e00000">OpenBSD 5.2 Security Advisories</font></h3>
259: These are the OpenBSD 5.2 advisories -- all these problems are solved
260: in <a href=anoncvs.html>OpenBSD current</a> and the
261: <a href=stable.html>patch branch</a>.
262:
263: <p>
264: <ul>
265: None yet!
266: </ul>
267:
1.395 sthen 268: <p>
269: OpenBSD 5.1 and earlier releases are not supported anymore. The following
270: paragraphs only list advisories issued while they were maintained; these
271: releases are likely to be affected by the advisories for more recent releases.
272: <br>
273:
1.393 sthen 274: <li>
1.390 sthen 275: <a name="51"></a>
276:
277: <h3><font color="#e00000">OpenBSD 5.1 Security Advisories</font></h3>
278: These are the OpenBSD 5.1 advisories -- all these problems are solved
279: in <a href=anoncvs.html>OpenBSD current</a> and the
280: <a href=stable.html>patch branch</a>.
281:
282: <p>
283: <ul>
1.393 sthen 284: <li><a href="errata51.html#001_libcrypto">April 23, 2012:
285: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 286: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.390 sthen 287: </ul>
288:
289: <li>
1.388 miod 290: <a name="50"></a>
291:
292: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
293: These are the OpenBSD 5.0 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>
1.393 sthen 299: <li><a href="errata50.html#002_libcrypto">April 23, 2012:
300: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 301: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.388 miod 302: </ul>
303:
304: <li>
1.387 miod 305: <a name="49"></a>
306:
307: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
308: These are the OpenBSD 4.9 advisories -- all these problems are solved
309: in <a href=anoncvs.html>OpenBSD current</a> and the
310: <a href=stable.html>patch branch</a>.
311:
312: <p>
313: <ul>
314: None yet!
315: </ul>
316:
317: <li>
318: <a name="48"></a>
319:
320: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
321: These are the OpenBSD 4.8 advisories -- all these problems are solved
322: in <a href=anoncvs.html>OpenBSD current</a> and the
323: <a href=stable.html>patch branch</a>.
324:
325: <p>
326: <ul>
327: <li><a href="errata48.html#009_pf">February 16, 2011:
328: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
329: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
330: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
331: prefixes "10.1.1.1/30") are not affected.</a>
332: <li><a href="errata48.html#008_openssl">February 11, 2011:
333: An incorrectly formatted ClientHello handshake message could cause
334: OpenSSL to parse past the end of the message. An attacker could use
335: this flaw to trigger an invalid memory access, causing a crash of an
336: application linked to OpenSSL. As well, certain applications may expose
337: the contents of parsed OCSP extensions, specifically the OCSP nonce
338: extension.
339: <br>
340: Applications are only affected if they act as a server and call
341: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
342: that nothing in the base OS uses this. Apache httpd started using this
343: in v2.3.3; this is newer than the version in ports.</a>
344: <li><a href="errata48.html#005_pf">December 17, 2010:
345: Insufficent initialization of the pf rule structure in the ioctl
346: handler may allow userland to modify kernel memory. By default root
347: privileges are needed to add or modify pf rules.</a>
348: </ul>
349:
350: <li>
1.385 jasper 351: <a name="47"></a>
352:
353: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
354: These are the OpenBSD 4.7 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>
1.387 miod 360: <li><a href="errata47.html#013_pf">February 16, 2011:
361: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
362: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
363: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
364: prefixes "10.1.1.1/30") are not affected.</a>
365: <li><a href="errata47.html#012_openssl">February 11, 2011:
366: An incorrectly formatted ClientHello handshake message could cause
367: OpenSSL to parse past the end of the message. An attacker could use
368: this flaw to trigger an invalid memory access, causing a crash of an
369: application linked to OpenSSL. As well, certain applications may expose
370: the contents of parsed OCSP extensions, specifically the OCSP nonce
371: extension.
372: <br>
373: Applications are only affected if they act as a server and call
374: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
375: that nothing in the base OS uses this. Apache httpd started using this
376: in v2.3.3; this is newer than the version in ports.</a>
377: <li><a href="errata47.html#009_pf">December 17, 2010:
378: Insufficent initialization of the pf rule structure in the ioctl
379: handler may allow userland to modify kernel memory. By default root
380: privileges are needed to add or modify pf rules.</a>
381: <li><a href="errata47.html#004_pfsync">April 23, 2010:
382: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 383: <li><a href="errata47.html#003_openssl">April 14, 2010:
384: In TLS connections, certain incorrectly formatted records can
385: cause an OpenSSL client or server to crash due to a read
1.392 tobias 386: attempt at NULL.</a>
1.385 jasper 387: </ul>
388:
389: <li>
1.378 jasper 390: <a name="46"></a>
391:
392: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
393: These are the OpenBSD 4.6 advisories -- all these problems are solved
394: in <a href=anoncvs.html>OpenBSD current</a> and the
395: <a href=stable.html>patch branch</a>.
396:
397: <p>
398: <ul>
1.385 jasper 399: <li><a href="errata46.html#010_openssl">April 14, 2010:
400: In TLS connections, certain incorrectly formatted records can
401: cause an OpenSSL client or server to crash due to a read
1.392 tobias 402: attempt at NULL.</a>
1.384 jasper 403: <li><a href="errata46.html#006_openssl">March 12, 2010:
404: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 405: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 406: <li><a href="errata46.html#004_openssl">November 26, 2009:
407: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 408: related to renegotiation.</a>
1.378 jasper 409: </ul>
1.382 tobias 410:
411: <li>
1.373 djm 412: <a name="45"></a>
413:
414: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
415: These are the OpenBSD 4.5 advisories -- all these problems are solved
416: in <a href=anoncvs.html>OpenBSD current</a> and the
417: <a href=stable.html>patch branch</a>.
418:
419: <p>
420: <ul>
1.385 jasper 421: <li><a href="errata45.html#016_openssl">April 14, 2010:
422: In TLS connections, certain incorrectly formatted records can
423: cause an OpenSSL client or server to crash due to a read
1.392 tobias 424: attempt at NULL.</a>
1.385 jasper 425: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 426: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 427: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 428: <li><a href="errata45.html#010_openssl">November 26, 2009:
429: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 430: related to renegotiation.</a>
1.373 djm 431: </ul>
432:
433: <li>
1.365 deraadt 434: <a name="44"></a>
435:
436: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
437: These are the OpenBSD 4.4 advisories -- all these problems are solved
438: in <a href=anoncvs.html>OpenBSD current</a> and the
439: <a href=stable.html>patch branch</a>.
440:
441: <p>
442: <ul>
1.372 millert 443: <li><a href="errata44.html#011_sudo">February 22, 2009:
444: sudo(8) may allow a user listed in sudoers to run a command
445: as a different user than their access rule specifies when a Unix
446: group is used in the RunAs portion of the rule.</a>
1.370 djm 447: <li><a href="errata44.html#008_bind">January 15, 2009:
448: named(8) suffered from a similar logic error that may allow
449: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 450: <li><a href="errata44.html#007_openssl">January 9, 2009:
451: OpenSSL suffered from some logic errors that allowed bypass
452: of DSA/ECDSA certificate validation.</a>
1.367 brad 453: <li><a href="errata44.html#001_ndp">November 2, 2008:
454: The Neighbor Discovery Protocol (ndp) did not correctly verify
455: neighbor solicitation requests maybe allowing a nearby attacker
456: to intercept traffic.</a>
1.365 deraadt 457: </ul>
458:
459: <li>
1.357 brad 460: <a name="43"></a>
461:
462: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
463: These are the OpenBSD 4.3 advisories -- all these problems are solved
464: in <a href=anoncvs.html>OpenBSD current</a> and the
465: <a href=stable.html>patch branch</a>.
466:
467: <p>
468: <ul>
1.372 millert 469: <li><a href="errata43.html#011_sudo">February 22, 2009:
470: sudo(8) may allow a user listed in sudoers to run a command
471: as a different user than their access rule specifies when a Unix
472: group is used in the RunAs portion of the rule.</a>
1.370 djm 473: <li><a href="errata43.html#008_bind">January 15, 2009:
474: named(8) suffered from a similar logic error that may allow
475: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 476: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 477: OpenSSL suffered from some logic errors that allowed bypass
478: of DSA/ECDSA certificate validation.</a>
1.382 tobias 479: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 480: The Neighbor Discovery Protocol (ndp) did not correctly verify
481: neighbor solicitation requests maybe allowing a nearby attacker
482: to intercept traffic.</a>
1.362 brad 483: <li><a href="errata43.html#004_bind">July 23, 2008:
484: A vulnerability has been found with BIND.</a>
1.361 brad 485: <li><a href="errata43.html#003_xorg">July 15, 2008:
486: Multiple vulnerabilities in X.Org.</a>
1.359 brad 487: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 488: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 489: <li><a href="errata43.html#001_openssh">March 30, 2008:
490: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 491: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 492: </ul>
493:
494: <li>
1.348 merdely 495: <a name="42"></a>
496: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
497: These are the OpenBSD 4.2 advisories -- all these problems are solved
498: in <a href=anoncvs.html>OpenBSD current</a> and the
499: <a href=stable.html>patch branch</a>.
500:
501: <p>
502: <ul>
1.364 tobias 503: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 504: The Neighbor Discovery Protocol (ndp) did not correctly verify
505: neighbor solicitation requests maybe allowing a nearby attacker
506: to intercept traffic.</a>
1.362 brad 507: <li><a href="errata42.html#013_bind">July 23, 2008:
508: A vulnerability has been found with BIND.</a>
1.361 brad 509: <li><a href="errata42.html#012_xorg2">July 15, 2008:
510: Multiple vulnerabilities in X.Org.</a>
1.359 brad 511: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 512: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 513: <li><a href="errata42.html#010_openssh">March 30, 2008:
514: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 515: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 516: <li><a href="errata42.html#009_ppp">March 7, 2008:
517: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 518: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
519: Multiple vulnerabilities in X.Org.</a>
1.351 okan 520: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
521: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 522: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 523: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 524: </ul>
525:
526: <li>
1.346 matthieu 527: <a name="41"></a>
528:
529: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
530: These are the OpenBSD 4.1 advisories -- all these problems are solved
531: in <a href=anoncvs.html>OpenBSD current</a> and the
532: <a href=stable.html>patch branch</a>.
533:
534: <p>
535: <ul>
1.359 brad 536: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 537: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 538: <li><a href="errata41.html#015_openssh">March 30, 2008:
539: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 540: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 541: <li><a href="errata41.html#014_ppp">March 7, 2008:
542: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 543: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
544: Multiple vulnerabilities in X.Org.</a>
545: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
546: The SSL_get_shared_ciphers() function in OpenSSL contains
547: an off-by-one overflow.</a>
1.350 deraadt 548: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 549: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 550: <li><a href="errata41.html#009_file">Jul 9, 2007:
551: Fix possible heap overflow in file(1).</a>
1.346 matthieu 552: <li><a href="errata41.html#005_route6">Apr 27, 2007:
553: IPv6 type 0 route headers can be used to mount a DoS attack
554: against hosts and networks.</a>
555: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
556: Multiple vulnerabilities in X.Org.</a>
557: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
558: Incorrect mbuf handling for ICMP6 packets.</a>
559: </ul>
560:
561: <li>
1.334 brad 562: <a name="40"></a>
563: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
564: These are the OpenBSD 4.0 advisories -- all these problems are solved
565: in <a href=anoncvs.html>OpenBSD current</a> and the
566: <a href=stable.html>patch branch</a>.
567:
568: <p>
569: <ul>
1.382 tobias 570: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
571: The SSL_get_shared_ciphers() function in OpenSSL contains an
572: off-by-one overflow.</a>
1.350 deraadt 573: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 574: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 575: <li><a href="errata40.html#015_file">Jul 9, 2007:
576: Fix possible heap overflow in file(1).</a>
1.343 deraadt 577: <li><a href="errata40.html#012_route6">Apr 23, 2007:
578: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 579: against hosts and networks.</a>
1.342 mbalmer 580: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
581: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 582: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
583: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 584: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 585: Insufficient validation in vga(4) may allow an attacker to gain
586: root privileges on some i386 systems.</a>
1.339 deraadt 587: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 588: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 589: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 590: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
591: found by Chris Evans.</a>
1.339 deraadt 592: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 593: Several problems have been found in OpenSSL.</a>
1.339 deraadt 594: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 595: httpd(8) does not sanitize the Expect header from an HTTP request
596: when it is reflected back in an error message, which might allow
597: cross-site scripting (XSS) style attacks.</a>
598: </ul>
599:
600: <li>
1.321 brad 601: <a name="39"></a>
602:
603: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
604: These are the OpenBSD 3.9 advisories -- all these problems are solved
605: in <a href=anoncvs.html>OpenBSD current</a> and the
606: <a href=stable.html>patch branch</a>.
607:
608: <p>
609: <ul>
1.343 deraadt 610: <li><a href="errata39.html#022_route6">Apr 23, 2007:
611: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 612: against hosts and networks.</a>
1.342 mbalmer 613: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
614: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 615: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
616: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 617: <li><a href="errata39.html#agp">Jan 3, 2007:
618: Insufficient validation in vga(4) may allow an attacker to gain
619: root privileges on some i386 systems.</a>
1.336 brad 620: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 621: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 622: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 623: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 624: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 625: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 626: found by Chris Evans.</a>
1.333 deraadt 627: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 628: Several problems have been found in OpenSSL.</a>
1.333 deraadt 629: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 630: httpd(8) does not sanitize the Expect header from an HTTP request
631: when it is reflected back in an error message, which might allow
632: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 633: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 634: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
635: possible for an attacker to construct an invalid signature which
636: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 637: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 638: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 639: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 640: Due to the failure to correctly validate LCP configuration option
641: lengths, it is possible for an attacker to send LCP packets via an
642: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 643: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 644: A problem in isakmpd(8) caused IPsec to run partly without replay
645: protection.</a>
1.333 deraadt 646: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 647: It is possible to cause the kernel to panic when more than the default
648: number of sempahores have been allocated.</a>
1.333 deraadt 649: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 650: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
651: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
652: option.</a>
1.333 deraadt 653: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 654: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 655: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 656: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
657: overflow.</a>
1.333 deraadt 658: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 659: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 660: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 661: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 662: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 663: A race condition has been reported to exist in the handling by sendmail
664: of asynchronous signals.</a>
665: </ul>
666:
667: <li>
1.318 deraadt 668: <a name="38"></a>
669:
670: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
671: These are the OpenBSD 3.8 advisories -- all these problems are solved
672: in <a href=anoncvs.html>OpenBSD current</a> and the
673: <a href=stable.html>patch branch</a>.
674:
675: <p>
676: <ul>
1.332 brad 677: <li><a href="errata38.html#ssh2">Oct 12, 2006:
678: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 679: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 680: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 681: found by Chris Evans.</a>
682: <li><a href="errata38.html#openssl2">Oct 7, 2006:
683: Several problems have been found in OpenSSL.</a>
684: <li><a href="errata38.html#httpd2">Oct 7, 2006:
685: httpd(8) does not sanitize the Expect header from an HTTP request
686: when it is reflected back in an error message, which might allow
687: cross-site scripting (XSS) style attacks.</a>
1.329 brad 688: <li><a href="errata38.html#openssl">Sep 8, 2006:
689: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
690: possible for an attacker to construct an invalid signature which
691: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 692: <li><a href="errata38.html#bind">Sep 8, 2006:
693: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 694: <li><a href="errata38.html#sppp">Sep 2, 2006:
695: Due to the failure to correctly validate LCP configuration option
696: lengths, it is possible for an attacker to send LCP packets via an
697: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 698: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
699: A problem in isakmpd(8) caused IPsec to run partly without replay
700: protection.</a>
701: <li><a href="errata38.html#sem">Aug 25, 2006:
702: It is possible to cause the kernel to panic when more than the default
703: number of sempahores have been allocated.</a>
704: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
705: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
706: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
707: option.</a>
708: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
709: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 710: <li><a href="errata38.html#httpd">Jul 30, 2006:
711: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
712: overflow.</a>
1.324 brad 713: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
714: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 715: <li><a href="errata38.html#xorg">May 2, 2006:
716: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 717: <li><a href="errata38.html#sendmail">Mar 25, 2006:
718: A race condition has been reported to exist in the handling by sendmail
719: of asynchronous signals.</a>
720: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 721: Josh Bressers has reported a weakness in OpenSSH caused due to the
722: insecure use of the system(3) function in scp(1) when performing copy
723: operations using filenames that are supplied by the user from the
724: command line.</a>
1.321 brad 725: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 726: Do not allow users to trick suid programs into re-opening files via
727: /dev/fd.</a>
1.321 brad 728: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 729: A buffer overflow has been found in the Perl interpreter with the
730: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 731: </ul>
732:
733: <li>
1.312 david 734: <a name="37"></a>
735:
736: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
737: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 738: in <a href="anoncvs.html">OpenBSD current</a>. The
739: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
740: you should update your machine.
1.312 david 741:
742: <p>
743: <ul>
1.322 brad 744: <li><a href="errata37.html#xorg">May 2, 2006:
745: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 746: <li><a href="errata37.html#sendmail">Mar 25, 2006:
747: A race condition has been reported to exist in the handling by sendmail
748: of asynchronous signals.</a>
1.320 brad 749: <li><a href="errata37.html#ssh">Feb 12, 2006:
750: Josh Bressers has reported a weakness in OpenSSH caused due to the
751: insecure use of the system(3) function in scp(1) when performing copy
752: operations using filenames that are supplied by the user from the
753: command line.</a>
1.319 brad 754: <li><a href="errata37.html#fd">Jan 5, 2006:
755: Do not allow users to trick suid programs into re-opening files via
756: /dev/fd.</a>
757: <li><a href="errata37.html#perl">Jan 5, 2006:
758: A buffer overflow has been found in the Perl interpreter with the
759: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 760: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 761: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 762: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 763: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 764: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 765: Fix a race condition in sudo(8) that could allow a user
1.315 millert 766: to run arbitrary commands.</a>
1.318 deraadt 767: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 768: Fix a buffer overflow, memory leaks, and NULL pointer
769: dereference in cvs(1).</a>
1.312 david 770: </ul>
771:
772: <li>
1.301 miod 773: <a name="36"></a>
774:
775: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
776: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 777: in <a href="anoncvs.html">OpenBSD current</a>. The
778: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
779: you should update your machine.
1.301 miod 780:
781: <p>
1.302 markus 782: <ul>
1.317 millert 783: <li><a href="errata36.html#libz2">Jul 21, 2005:
784: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 785: <li><a href="errata36.html#libz">Jul 6, 2005:
786: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 787: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 788: Fix a race condition in sudo(8) that could allow a user
1.315 millert 789: to run arbitrary commands.</a>
1.311 deraadt 790: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 791: Fix a buffer overflow, memory leaks, and NULL pointer
792: dereference in cvs(1).</a>
1.311 deraadt 793: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 794: Due to buffer overflows in telnet(1), a malicious
795: server or man-in-the-middle attack could allow
796: execution of arbitrary code with the privileges of
797: the user invoking telnet(1).</a>
1.311 deraadt 798: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 799: More stringent checking should be done in the copy(9)
800: functions to prevent their misuse.</a>
1.311 deraadt 801: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 802: More stringent checking should be done in the copy(9)
803: functions to prevent their misuse.</a>
1.311 deraadt 804: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 805: httpd(8)'s mod_include module fails to properly validate
806: the length of user supplied tag strings prior to copying
1.305 brad 807: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 808: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 809: On systems running isakmpd(8) it is possible for a local
810: user to cause kernel memory corruption and system panic by
1.303 markus 811: setting ipsec(4) credentials on a socket.</a>
1.302 markus 812: </ul>
1.301 miod 813:
814: <li>
1.288 matthieu 815: <a name="35"></a>
1.279 deraadt 816:
1.294 david 817: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 818: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 819: in <a href="anoncvs.html">OpenBSD current</a>. The
820: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
821: you should update your machine.
1.279 deraadt 822:
823: <p>
824: <ul>
1.310 brad 825: <li><a href="errata35.html#cvs4">Apr 28, 2005:
826: Fix a buffer overflow, memory leaks, and NULL pointer
827: dereference in cvs(1).</a>
1.309 brad 828: <li><a href="errata35.html#telnet">Mar 30, 2005:
829: Due to buffer overflows in telnet(1), a malicious
830: server or man-in-the-middle attack could allow
831: execution of arbitrary code with the privileges of
832: the user invoking telnet(1).</a>
1.308 brad 833: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 834: More stringent checking should be done in the copy(9)
835: functions to prevent their misuse.</a>
1.306 brad 836: <li><a href="errata35.html#locore">Feb 28, 2005:
837: More stringent checking should be done in the copy(9)
838: functions to prevent their misuse.</a>
1.304 brad 839: <li><a href="errata35.html#httpd3">Jan 12, 2005:
840: httpd(8)'s mod_include module fails to properly validate
841: the length of user supplied tag strings prior to copying
1.305 brad 842: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 843: <li><a href="errata35.html#pfkey">Dec 14, 2004:
844: On systems running isakmpd(8) it is possible for a local
845: user to cause kernel memory corruption and system panic by
1.303 markus 846: setting ipsec(4) credentials on a socket.</a>
1.301 miod 847: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 848: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 849: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 850: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 851: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 852: httpd(8)'s mod_rewrite module can be made to write one zero byte in
853: an arbitrary memory position outside of a char array, causing a DoS
854: or possibly buffer overflows.</a>
1.301 miod 855: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 856: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 857: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 858: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 859: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 860: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 861: Multiple remote vulnerabilities have been found in the cvs(1)
862: server which can be used by CVS clients to crash or execute
1.293 brad 863: arbitrary code on the server.</a>
1.301 miod 864: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 865: kdc(8) performs inadequate checking of request fields, leading
866: to the possibility of principal impersonation from other
867: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 868: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 869: xdm(1) ignores the requestPort resource and creates a
1.293 brad 870: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 871: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 872: A buffer overflow in the cvs(1) server has been found,
873: which can be used by CVS clients to execute arbitrary code on
1.293 brad 874: the server.</a>
1.301 miod 875: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 876: Integer overflow problems were found in procfs, allowing
1.293 brad 877: reading of arbitrary kernel memory.</a>
1.301 miod 878: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 879: Pathname validation problems have been found in cvs(1),
880: allowing clients and servers access to files outside the
1.293 brad 881: repository or local CVS tree.</a>
1.279 deraadt 882: </ul>
883:
884: <p>
885: <li>
1.288 matthieu 886: <a name="34"></a>
1.261 david 887:
1.294 david 888: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 889: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 890: in <a href="anoncvs.html">OpenBSD current</a>. The
891: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
892: you should update your machine.
1.261 david 893: <p>
894: <ul>
1.302 markus 895: <li><a href="errata34.html#pfkey">Dec 14, 2004:
896: On systems running isakmpd(8) it is possible for a local
897: user to cause kernel memory corruption and system panic by
1.303 markus 898: setting ipsec(4) credentials on a socket.</a>
1.298 brad 899: <li><a href="errata34.html#xpm">Sep 16, 2004:
900: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 901: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
902: httpd(8)'s mod_rewrite module can be made to write one zero byte in
903: an arbitrary memory position outside of a char array, causing a DoS
904: or possibly buffer overflows.</a>
1.294 david 905: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 906: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 907: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 908: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 909: an attacker can delete IPsec tunnels at will.</a>
1.294 david 910: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 911: Multiple remote vulnerabilities have been found in the cvs(1)
912: server which can be used by CVS clients to crash or execute
1.293 brad 913: arbitrary code on the server.</a>
1.294 david 914: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 915: kdc(8) performs inadequate checking of request fields, leading
916: to the possibility of principal impersonation from other
917: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 918: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 919: A buffer overflow in the cvs(1) server has been found,
920: which can be used by CVS clients to execute arbitrary code on
921: the server.</a>
1.294 david 922: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 923: Integer overflow problems were found in procfs, allowing
924: reading of arbitrary kernel memory.</a>
1.294 david 925: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 926: Pathname validation problems have been found in cvs(1),
927: allowing clients and servers access to files outside the
928: repository or local CVS tree.</a>
1.294 david 929: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 930: A missing check for a NULL-pointer dereference may allow a
1.281 otto 931: remote attacker to crash applications using OpenSSL.</a>
1.294 david 932: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 933: Defects in the payload validation and processing functions of
934: isakmpd have been discovered. An attacker could send malformed
935: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 936: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 937: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
938: access module, using IP addresses without a netmask on big endian
939: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 940: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 941: An IPv6 MTU handling problem exists that could be used by an
942: attacker to cause a denial of service attack.</a>
1.294 david 943: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 944: A reference counting bug in shmat(2) could be used to write to
945: kernel memory under certain circumstances.</a>
1.294 david 946: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 947: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 948: by Thomas Walpuski.</a>
1.294 david 949: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 950: It may be possible for a local user to overrun the stack in
951: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 952: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 953: The use of certain ASN.1 encodings or malformed public keys may
954: allow an attacker to mount a denial of service attack against
955: applications linked with ssl(3).</a>
1.261 david 956: </ul>
957:
958: <li>
1.288 matthieu 959: <a name="33"></a>
1.246 deraadt 960:
1.294 david 961: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 962: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 963: in <a href="anoncvs.html">OpenBSD current</a>. The
964: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 965: you should update your machine.
1.246 deraadt 966: <p>
967: <ul>
1.294 david 968: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 969: Pathname validation problems have been found in cvs(1),
970: allowing clients and servers access to files outside the
971: repository or local CVS tree.</a>
1.294 david 972: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 973: A missing check for a NULL-pointer dereference may allow a
1.281 otto 974: remote attacker to crash applications using OpenSSL.</a>
1.294 david 975: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 976: Defects in the payload validation and processing functions of
977: isakmpd have been discovered. An attacker could send malformed
978: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 979: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 980: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
981: access module, using IP addresses without a netmask on big endian
982: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 983: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 984: An IPv6 MTU handling problem exists that could be used by an
985: attacker to cause a denial of service attack.</a>
1.294 david 986: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 987: A reference counting bug in shmat(2) could be used to write to
988: kernel memory under certain circumstances.</a>
1.294 david 989: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 990: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 991: by Thomas Walpuski.</a>
1.294 david 992: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 993: It may be possible for a local user to execute arbitrary code
994: resulting in escalation of privileges due to a stack overrun
995: in compat_ibcs2(8).</a>
1.294 david 996: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 997: The use of certain ASN.1 encodings or malformed public keys may
998: allow an attacker to mount a denial of service attack against
999: applications linked with ssl(3).</a>
1.294 david 1000: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 1001: Access of freed memory in pf(4) could be used to
1.260 margarid 1002: remotely panic a machine using scrub rules.</a>
1.294 david 1003: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 1004: A buffer overflow in the address parsing in
1005: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1006: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 1007: OpenSSH versions prior to 3.7 contains a buffer management error
1008: that is potentially exploitable.</a>
1.294 david 1009: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 1010: Root may be able to reduce the security level by taking advantage of
1011: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 1012: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 1013: An improper bounds check in the kernel may allow a local user
1014: to panic the kernel.</a>
1.294 david 1015: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 1016: An off-by-one error exists in the C library function realpath(3)
1017: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 1018: </ul>
1019:
1.265 miod 1020:
1.247 david 1021: <p>
1.246 deraadt 1022: <li>
1.288 matthieu 1023: <a name="32"></a>
1.224 deraadt 1024:
1.294 david 1025: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 1026: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 1027: in <a href="anoncvs.html">OpenBSD current</a>. The
1028: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 1029: you should update your machine.
1.224 deraadt 1030: <p>
1031: <ul>
1.294 david 1032: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 1033: The use of certain ASN.1 encodings or malformed public keys may
1034: allow an attacker to mount a denial of service attack against
1035: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 1036: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 1037: Access of freed memory in pf(4) could be used to
1.260 margarid 1038: remotely panic a machine using scrub rules.</a>
1.294 david 1039: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 1040: A buffer overflow in the address parsing in
1041: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1042: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 1043: OpenSSH versions prior to 3.7 contains a buffer management error
1044: that is potentially exploitable.</a>
1.294 david 1045: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 1046: Fix for a potential security issue in
1047: sendmail(8) with respect to DNS maps.</a>
1.294 david 1048: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1049: An off-by-one error exists in the C library function realpath(3)
1050: may allow an attacker to gain escalated privileges.</a>
1.294 david 1051: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1052: A buffer overflow in the address parsing in
1053: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1054: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1055: A cryptographic weaknesses in the Kerberos v4 protocol can be
1056: exploited on Kerberos v5 as well.</a>
1.294 david 1057: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1058: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1059: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1060: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1061: Various SSL and TLS operations in OpenSSL are vulnerable to
1062: timing attacks.</a>
1.294 david 1063: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1064: A buffer overflow in lprm(1) may allow an attacker to elevate
1.392 tobias 1065: privileges to user daemon.</a>
1.294 david 1066: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1067: A buffer overflow in the envelope comments processing in
1068: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1069: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1070: httpd(8) leaks file inode numbers via ETag header as well as
1071: child PIDs in multipart MIME boundary generation. This could
1072: lead, for example, to NFS exploitation because it uses inode
1073: numbers as part of the file handle.</a>
1.294 david 1074: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1075: In ssl(8) an information leak can occur via timing by performing
1076: a MAC computation even if incorrect block cipher padding has
1077: been found, this is a countermeasure. Also, check for negative
1078: sizes, in allocation routines.</a>
1.294 david 1079: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1080: A double free exists in cvs(1) that could lead to privilege
1081: escalation for cvs configurations where the cvs command is
1.233 margarid 1082: run as a privileged user.</a>
1.294 david 1083: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1084: A buffer overflow exists in named(8) that could lead to a
1085: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1086: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1087: A logic error in the pool kernel memory allocator could cause
1088: memory corruption in low-memory situations, causing the system
1089: to crash.</a>
1.294 david 1090: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1091: An attacker can bypass smrsh(8)'s restrictions and execute
1092: arbitrary commands with the privileges of his own account.</a>
1.294 david 1093: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1094: Network bridges running pf with scrubbing enabled could cause
1095: mbuf corruption, causing the system to crash.</a>
1.294 david 1096: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1097: A buffer overflow can occur in the kadmind(8) daemon, leading
1098: to possible remote crash or exploit.</a>
1.224 deraadt 1099: </ul>
1100:
1.227 miod 1101: <p>
1102: <li>
1.288 matthieu 1103: <a name="31"></a>
1.203 deraadt 1104:
1.294 david 1105: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1106: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1107: in <a href="anoncvs.html">OpenBSD current</a>. The
1108: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1109: you should update your machine.
1.203 deraadt 1110:
1111: <p>
1112: <ul>
1.294 david 1113: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1114: A buffer overflow in the address parsing in
1115: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1116: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1117: A cryptographic weaknesses in the Kerberos v4 protocol can be
1118: exploited on Kerberos v5 as well.</a>
1.294 david 1119: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1120: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1121: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1122: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1123: Various SSL and TLS operations in OpenSSL are vulnerable to
1124: timing attacks.</a>
1.294 david 1125: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1126: A buffer overflow in lprm(1) may allow an attacker to gain
1127: root privileges.</a>
1.294 david 1128: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1129: A buffer overflow in the envelope comments processing in
1130: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1131: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1132: In ssl(8) an information leak can occur via timing by performing
1133: a MAC computation even if incorrect block cipher padding has
1134: been found, this is a countermeasure. Also, check for negative
1135: sizes, in allocation routines.</a>
1.294 david 1136: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1137: A double free exists in cvs(1) that could lead to privilege
1138: escalation for cvs configurations where the cvs command is
1.392 tobias 1139: run as a privileged user.</a>
1.294 david 1140: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1141: A buffer overflow exists in named(8) that could lead to a
1142: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1143: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1144: Incorrect argument checking in the getitimer(2) system call
1145: may allow an attacker to crash the system.</a>
1.294 david 1146: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1147: An attacker can bypass smrsh(8)'s restrictions and execute
1148: arbitrary commands with the privileges of his own account.</a>
1.294 david 1149: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1150: A buffer overflow can occur in the kadmind(8) daemon, leading
1151: to possible remote crash or exploit.</a>
1.294 david 1152: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1153: Incorrect argument checking in the setitimer(2) system call
1154: may allow an attacker to write to kernel memory.</a>
1.294 david 1155: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1156: An insufficient boundary check in the select system call
1.220 miod 1157: allows an attacker to overwrite kernel memory and execute arbitrary code
1158: in kernel context.</a>
1.294 david 1159: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1160: Several remote buffer overflows can occur in the SSL2 server and SSL3
1161: client of the ssl(8) library, as in the ASN.1 parser code in the
1162: crypto(3) library, all of them being potentially remotely
1163: exploitable.</a>
1.294 david 1164: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1165: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1166: possible remote crash.</a>
1.294 david 1167: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1168: A race condition exists in the pppd(8) daemon which may cause it to
1169: alter the file permissions of an arbitrary file.</a>
1.294 david 1170: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1171: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1172: crash.</a>
1.294 david 1173: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1174: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1175: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1176: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1177: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1178: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1179: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1180: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1181: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1182: input validation error that can result in an integer overflow and
1183: privilege escalation.</a>
1.294 david 1184: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1185: A buffer overflow can occur during the interpretation of chunked
1186: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1187: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1188: Under certain conditions, on systems using YP with netgroups
1189: in the password database, it is possible that sshd(8) does
1190: ACL checks for the requested user name but uses the password
1191: database entry of a different user for authentication. This
1192: means that denied users might authenticate successfully
1193: while permitted users could be locked out.</a>
1.294 david 1194: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1195: A race condition exists that could defeat the kernel's
1196: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1197: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1198: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1199: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1200: A local user can gain super-user privileges due to a buffer
1201: overflow in sshd(8) if AFS has been configured on the system
1202: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1203: in the sshd_config file.</a>
1.203 deraadt 1204: </ul>
1205:
1.235 miod 1206: <p>
1.203 deraadt 1207: <li>
1.288 matthieu 1208: <a name="30"></a>
1.187 deraadt 1209:
1.294 david 1210: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1211: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1212: in <a href="anoncvs.html">OpenBSD current</a>. The
1213: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1214: you should update your machine.
1.187 deraadt 1215:
1216: <p>
1217: <ul>
1.294 david 1218: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1219: A buffer overflow exists in named(8) that could lead to a
1220: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1221: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1222: Incorrect argument checking in the getitimer(2) system call
1223: may allow an attacker to crash the system.</a>
1.294 david 1224: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1225: An attacker can bypass smrsh(8)'s restrictions and execute
1226: arbitrary commands with the privileges of his own account.</a>
1.294 david 1227: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1228: A buffer overflow can occur in the kadmind(8) daemon, leading
1229: to possible remote crash or exploit.</a>
1.294 david 1230: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1231: Incorrect argument checking in the setitimer(2) system call
1232: may allow an attacker to write to kernel memory.</a>
1.294 david 1233: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1234: An insufficient boundary check in the select and poll system calls
1235: allows an attacker to overwrite kernel memory and execute arbitrary code
1236: in kernel context.</a>
1.294 david 1237: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1238: Several remote buffer overflows can occur in the SSL2 server and SSL3
1239: client of the ssl(8) library, as in the ASN.1 parser code in the
1240: crypto(3) library, all of them being potentially remotely
1241: exploitable.</a>
1.294 david 1242: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1243: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1244: possible remote crash.</a>
1.294 david 1245: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1246: A race condition exists in the pppd(8) daemon which may cause it to
1247: alter the file permissions of an arbitrary file.</a>
1.294 david 1248: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1249: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1250: crash.</a>
1.294 david 1251: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1252: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1253: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1254: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1255: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1256: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1257: input validation error that can result in an integer overflow and
1258: privilege escalation.</a>
1.294 david 1259: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1260: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1261: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1262: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1263: A buffer overflow can occur during the interpretation of chunked
1264: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1265: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1266: A race condition exists that could defeat the kernel's
1267: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1268: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1269: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1270: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1271: A local user can gain super-user privileges due to a buffer
1272: overflow in sshd(8) if AFS has been configured on the system
1273: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1274: in the sshd_config file.</a>
1.294 david 1275: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1276: The mail(1) was interpreting tilde escapes even when invoked
1277: in non-interactive mode. As mail(1) is called as root from cron,
1278: this can lead to a local root compromise.</a>
1.294 david 1279: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1280: Under certain conditions, on systems using YP with netgroups in
1281: the password database, it is possible for the rexecd(8) and rshd(8)
1282: daemons to execute a shell from a password database entry for a
1283: different user. Similarly, atrun(8) may change to the wrong
1284: home directory when running jobs.</a>
1.294 david 1285: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1286: A potential double free() exists in the zlib library;
1287: this is not exploitable on OpenBSD.
1288: The kernel also contains a copy of zlib; it is not
1289: currently known if the kernel zlib is exploitable.</a>
1.294 david 1290: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1291: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1292: may allow a local user to gain super-user privileges.</a>
1.294 david 1293: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1294: A race condition between the ptrace(2) and execve(2) system calls
1295: allows an attacker to modify the memory contents of suid/sgid
1296: processes which could lead to compromise of the super-user account.</a>
1.294 david 1297: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1298: There is a security hole in sudo(8) that can be exploited
1299: when the Postfix sendmail replacement is installed that may
1300: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1301: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1302: An attacker can trick a machine running the lpd daemon into
1303: creating new files in the root directory from a machine with
1304: remote line printer access.</a>
1.294 david 1305: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1306: The vi.recover script can be abused in such a way as
1307: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1308: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1309: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1310: resulting in a crash.</a>
1.294 david 1311: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1312: A security hole that may allow an attacker to partially authenticate
1313: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1314: </ul>
1315:
1316: <p>
1317: <li>
1.288 matthieu 1318: <a name="29"></a>
1.173 deraadt 1319:
1.294 david 1320: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1321: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1322: in <a href="anoncvs.html">OpenBSD current</a>. The
1323: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1324: you should update your machine.
1325:
1.173 deraadt 1326:
1327: <p>
1328: <ul>
1.294 david 1329: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1330: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1331: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1332: A race condition exists that could defeat the kernel's
1333: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1334: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1335: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1336: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1337: A local user can gain super-user privileges due to a buffer
1338: overflow in sshd(8) if AFS has been configured on the system
1339: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1340: in the sshd_config file.</a>
1.294 david 1341: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1342: The mail(1) was interpreting tilde escapes even when invoked
1343: in non-interactive mode. As mail(1) is called as root from cron,
1344: this can lead to a local root compromise.</a>
1.294 david 1345: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1346: A potential double free() exists in the zlib library;
1347: this is not exploitable on OpenBSD.
1348: The kernel also contains a copy of zlib; it is not
1349: currently known if the kernel zlib is exploitable.</a>
1.294 david 1350: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1351: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1352: may allow a local user to gain super-user privileges.</a>
1.294 david 1353: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1354: A race condition between the ptrace(2) and execve(2) system calls
1355: allows an attacker to modify the memory contents of suid/sgid
1356: processes which could lead to compromise of the super-user account.</a>
1.294 david 1357: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1358: There is a security hole in sudo(8) that can be exploited
1359: when the Postfix sendmail replacement is installed that may
1360: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1361: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1362: An attacker can trick a machine running the lpd daemon into
1363: creating new files in the root directory from a machine with
1364: remote line printer access.</a>
1.294 david 1365: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1366: The vi.recover script can be abused in such a way as
1367: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1368: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1369: A security hole exists in uuxqt(8) that may allow an
1370: attacker to gain root privileges.</a>
1.294 david 1371: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1372: A security hole exists in lpd(8) that may allow an
1373: attacker to gain root privileges if lpd is running.</a>
1.294 david 1374: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1375: A security hole exists in sendmail(8) that may allow an
1376: attacker on the local host to gain root privileges.</a>
1.294 david 1377: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1378: A kernel buffer overflow in the NFS code can be used to execute
1379: arbitrary code by users with mount privileges (only root by
1.181 millert 1380: default).</a>
1.294 david 1381: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1382: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1383: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1384: sshd(8) allows users to delete arbitrary files named "cookies"
1385: if X11 forwarding is enabled. X11 forwarding is disabled
1386: by default.</a>
1.294 david 1387: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1388: Programs using the fts routines can be tricked into changing
1389: into the wrong directory.</a>
1.294 david 1390: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1391: Sendmail signal handlers contain unsafe code,
1392: leading to numerous race conditions.</a>
1.173 deraadt 1393: </ul>
1394:
1395: <p>
1396: <li>
1.288 matthieu 1397: <a name="28"></a>
1.152 deraadt 1398:
1.294 david 1399: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1400: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1401: in <a href="anoncvs.html">OpenBSD current</a>. The
1402: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1403: you should update your machine.
1404:
1.152 deraadt 1405:
1406: <p>
1407: <ul>
1.294 david 1408: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1409: A security hole exists in uuxqt(8) that may allow an
1410: attacker to gain root privileges.</a>
1.294 david 1411: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1412: A security hole exists in lpd(8) that may allow an
1413: attacker to gain root privileges if lpd is running.</a>
1.294 david 1414: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1415: A security hole exists in sendmail(8) that may allow an
1416: attacker on the local host to gain root privileges.</a>
1.294 david 1417: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1418: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1419: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1420: Programs using the fts routines can be tricked into changing
1421: into the wrong directory.</a>
1.294 david 1422: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1423: Sendmail signal handlers contain unsafe code,
1424: leading to numerous race conditions.</a>
1.294 david 1425: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1426: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1427: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1428: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1429: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1430: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1431: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1432: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1433: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1434: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1435: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1436: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1437: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1438: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1439: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1440: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1441: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1442: rnd(4) did not use all of its input when written to.</a>
1.294 david 1443: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1444: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1445: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1446: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1447: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1448: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1449: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1450: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1451: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1452: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1453: </ul>
1454:
1455: <p>
1456: <li>
1.288 matthieu 1457: <a name="27"></a>
1.124 deraadt 1458:
1.294 david 1459: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1460: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1461: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1462: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1463:
1464: <p>
1465: <ul>
1.294 david 1466: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1467: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1468: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1469: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1470: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1471: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1472: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1473: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1474: (patch included)</a>
1.294 david 1475: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1476: X11 libraries have 2 potential overflows in xtrans code.
1477: (patch included)</a>
1.294 david 1478: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1479: Apache mod_rewrite and mod_vhost_alias modules could expose files
1480: on the server in certain configurations if used.
1481: (patch included)</a>
1.294 david 1482: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1483: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1484: TERMPATH and TERMCAP environment variables as it should.
1485: (patch included)</a>
1.294 david 1486: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1487: There are printf-style format string bugs in several privileged
1488: programs. (patch included)</a>
1.294 david 1489: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1490: libcurses honored terminal descriptions in the $HOME/.terminfo
1491: directory as well as in the TERMCAP environment variable for
1492: setuid and setgid applications.
1.146 deraadt 1493: (patch included)</a>
1.294 david 1494: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1495: A format string vulnerability exists in talkd(8).
1496: (patch included)</a>
1.294 david 1497: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1498: A format string vulnerability exists in the pw_error() function of the
1499: libutil library, yielding localhost root through chpass(1).
1500: (patch included)</a>
1.294 david 1501: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1502: Bad ESP/AH packets could cause a crash under certain conditions.
1503: (patch included)</a>
1.294 david 1504: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1505: A format string vulnerability (localhost root) exists in xlock(1).
1506: (patch included)</a>
1.294 david 1507: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1508: Various bugs found in X11 libraries have various side effects, almost
1509: completely denial of service in OpenBSD.
1510: (patch included)</a>
1.294 david 1511: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1512: Just like pretty much all the other unix ftp daemons
1513: on the planet, ftpd had a remote root hole in it.
1514: Luckily, ftpd was not enabled by default.
1.137 deraadt 1515: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1516: (patch included)</a>
1.294 david 1517: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1518: Mopd, very rarely used, contained some buffer overflows.
1519: (patch included)</a>
1.294 david 1520: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1521: libedit would check for a <b>.editrc</b> file in the current
1522: directory. Not known to be a real security issue, but a patch
1523: is available anyways.
1524: (patch included)</a>
1.294 david 1525: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1526: A serious bug in dhclient(8) could allow strings from a
1527: malicious dhcp server to be executed in the shell as root.
1528: (patch included)</a>
1.294 david 1529: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1530: A serious bug in isakmpd(8) policy handling wherein
1531: policy verification could be completely bypassed in isakmpd.
1532: (patch included)</a>
1.294 david 1533: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1534: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1535: should not be used, and results in security problems on
1536: other operating systems.</a>
1.294 david 1537: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1538: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1539: (patch included)</a>
1.294 david 1540: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1541: Improper use of ipf <i>keep-state</i> rules can result
1542: in firewall rules being bypassed. (patch included)</a>
1543:
1.124 deraadt 1544: </ul>
1545:
1546: <p>
1547: <li>
1.288 matthieu 1548: <a name="26"></a>
1.119 deraadt 1549:
1.294 david 1550: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1551: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1552: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1553: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1554:
1555: <p>
1556: <ul>
1.294 david 1557: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1558: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1559: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1560: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1561: Improper use of ipf <i>keep-state</i> rules can result
1562: in firewall rules being bypassed. (patch included)</a>
1.294 david 1563: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1564: xlockmore has a bug which a localhost attacker can use to gain
1565: access to the encrypted root password hash (which is normally
1.245 miod 1566: encoded using blowfish</a> (see
1.294 david 1567: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1568: crypt(3)</a>)
1.245 miod 1569: (patch included).
1.294 david 1570: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1571: Systems running with procfs enabled and mounted are
1572: vulnerable to a very tricky exploit. procfs is not
1573: mounted by default.
1574: (patch included).</a>
1.294 david 1575: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1576: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1577: thus exposing the system to a race where the aliases file
1578: did not exist.
1.119 deraadt 1579: (patch included).</a>
1.294 david 1580: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1581: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1582: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1583: A buffer overflow in the RSAREF code included in the
1584: USA version of libssl, is possibly exploitable in
1585: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1586: (patch included).<br></a>
1587: <strong>Update:</strong> Turns out that this was not exploitable
1588: in any of the software included in OpenBSD 2.6.
1.294 david 1589: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1590: Any user could change interface media configurations, resulting in
1591: a localhost denial of service attack.
1.121 deraadt 1592: (patch included).</a>
1.119 deraadt 1593: </ul>
1594:
1595: <p>
1596: <li>
1.288 matthieu 1597: <a name="25"></a>
1.106 deraadt 1598:
1.294 david 1599: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1600: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1601: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1602: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1603:
1.96 deraadt 1604: <p>
1.104 deraadt 1605: <ul>
1.294 david 1606: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1607: In cron(8), make sure argv[] is NULL terminated in the
1608: fake popen() and run sendmail as the user, not as root.
1609: (patch included).</a>
1.294 david 1610: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1611: filesystems had an overrun in their handling of uio_offset
1612: in their readdir() routines. (These filesystems are not
1613: enabled by default). (patch included).</a>
1.294 david 1614: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1615: when we execve() a new process. (patch included).</a>
1.294 david 1616: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1617: been handled by IPsec may be transmitted as cleartext.
1618: PF_KEY SA expirations may leak kernel resources.
1619: (patch included).</a>
1.294 david 1620: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1621: motd re-writing and change the find(1) to use -execdir
1622: (patch included).</a>
1.294 david 1623: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1624: users to chflags(2) or fchflags(2) on character or block devices
1625: which they may currently be the owner of (patch included).</a>
1.294 david 1626: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1627: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1628: </ul>
1629:
1.106 deraadt 1630: <p>
1631: <li>
1.288 matthieu 1632: <a name="24"></a>
1.235 miod 1633:
1.294 david 1634: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1635: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1636: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1637: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1638:
1.96 deraadt 1639: <p>
1.75 deraadt 1640: <ul>
1.294 david 1641: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1642: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1643: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1644: another kernel crash case caused by the <strong>crashme</strong>
1645: program (patch included).</a>
1.294 david 1646: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1647: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1648: (patch included).</a>
1.294 david 1649: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1650: existed in ping(8). (patch included).</a>
1.294 david 1651: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1652: the ipq, which could permit an attacker to cause a crash.
1653: (patch included).</a>
1.294 david 1654: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1655: kernel between accept(2) and select(2) could permit an attacker
1656: to hang sockets from remote.
1657: (patch included).</a>
1.294 david 1658: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1659: bog the machine excessively and cause problems.
1660: (patch included).</a>
1.294 david 1661: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1662: DDB interacted to possibly cause a crash.
1663: (patch included).</a>
1.294 david 1664: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1665: (patch included).</a>
1.294 david 1666: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1667: problem in bootpd(8). (patch included).</a>
1.294 david 1668: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1669: exploitable problem relating to environment variables in termcap
1670: and curses. (patch included).</a>
1.294 david 1671: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1672: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1673: </ul>
1674:
1.106 deraadt 1675: <p>
1676: <li>
1.288 matthieu 1677: <a name="23"></a>
1.235 miod 1678:
1.294 david 1679: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1680: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1681: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1682: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1683:
1.96 deraadt 1684: <p>
1.53 matthieu 1685: <ul>
1.294 david 1686: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1687: problem in bootpd(8). (patch included).</a>
1.294 david 1688: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1689: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1690: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1691: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1692: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1693: chpass(1) has a file descriptor leak which allows an
1694: attacker to modify /etc/master.passwd.</a>
1.294 david 1695: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1696: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1697: should not be executed with fd slots 0, 1, or 2 free.
1698: (patch included).</a>
1.294 david 1699: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1700: libraries (patches included).</a>
1.294 david 1701: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1702: processes too permissive (4th revision patch included).</a>
1.294 david 1703: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1704: of immutable and append-only file flags. (patch included).</a>
1.294 david 1705: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1706: if IPSEC is enabled (patch included).</a>
1.294 david 1707: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1708: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1709: </ul>
1.9 deraadt 1710:
1.106 deraadt 1711: <p>
1712: <li>
1.288 matthieu 1713: <a name="22"></a>
1.235 miod 1714:
1.294 david 1715: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1716: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1717: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1718: still exist in other operating systems. (The supplied patches are for
1719: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1720:
1.96 deraadt 1721: <p>
1.9 deraadt 1722: <ul>
1.294 david 1723: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1724: packets if IPSEC is enabled (patch included).</a>
1.294 david 1725: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1726: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1727: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1728: (patch included).</a>
1.294 david 1729: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1730: (patch included).</a>
1.294 david 1731: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1732: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1733: (patch included).</a>
1.294 david 1734: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1735: export (patch included).</a>
1.112 philen 1736: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1737: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1738: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1739: Acceptance.</a>
1.294 david 1740: A patch is available <a href="errata22.html#sourceroute">here</a>.
1741: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1742: flaw (patch included).</a>
1.294 david 1743: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1744: </ul>
1745:
1.106 deraadt 1746: <p>
1747: <li>
1.288 matthieu 1748: <a name="21"></a>
1.235 miod 1749:
1.294 david 1750: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1751: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1752: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1753: exist in other operating systems. (If you are running OpenBSD 2.1, we
1754: would strongly recommend an upgrade to the newest release, as this
1755: patch list only attempts at fixing the most important security
1756: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1757: security problems. Many of those problems were solved in ways which
1758: make it hard for us to provide patches).
1759:
1.96 deraadt 1760: <p>
1.52 deraadt 1761: <ul>
1.112 philen 1762: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1763: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1764: (patch included)</a>
1.112 philen 1765: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1766: </ul>
1.51 deraadt 1767:
1.106 deraadt 1768: <p>
1769: <li>
1.288 matthieu 1770: <a name="20"></a>
1.235 miod 1771:
1.294 david 1772: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1773: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1774: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1775: exist in other operating systems. (If you are running OpenBSD 2.0, we
1776: commend you for being there back in the old days!, but you're really
1777: missing out if you don't install a new version!)
1778:
1779: <p>
1780: <ul>
1.112 philen 1781: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1782: resolver (patch included)</a>
1783: <li>Many others... if people can hunt them down, please let me know
1784: and we'll put them up here.
1785: </ul>
1.51 deraadt 1786: <p>
1.106 deraadt 1787:
1.288 matthieu 1788: <a name="watching"></a>
1.294 david 1789: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1790:
1.21 deraadt 1791: Since we take a proactive stance with security, we are continually
1792: finding and fixing new security problems. Not all of these problems
1.80 espie 1793: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1794: confirmed to be exploitable; many simple bugs we fix do turn out to
1795: have security consequences we could not predict. We do not have the
1796: time resources to make these changes available in the above format.<p>
1.21 deraadt 1797:
1798: Thus there are usually minor security fixes in the current source code
1799: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1800: guarantee that these problems are of minimal impact and unproven
1.44 ian 1801: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1802: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1803:
1.45 deraadt 1804: People who are really concerned with security can do a number of
1805: things:<p>
1.21 deraadt 1806:
1807: <ul>
1808: <li>If you understand security issues, watch our
1.294 david 1809: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1810: eye out for things which appear security related. Since
1.21 deraadt 1811: exploitability is not proven for many of the fixes we make,
1812: do not expect the relevant commit message to say "SECURITY FIX!".
1813: If a problem is proven and serious, a patch will be available
1814: here very shortly after.
1.161 horacio 1815: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1816: security-announce mailing list</a> which will notify you for every
1.186 ian 1817: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1818: and instruct you on how to patch the problem.
1.21 deraadt 1819: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1820: complete system build from time to time (read /usr/src/Makefile
1821: carefully). Users can make the assumption that the current
1822: source tree always has stronger security than the previous release.
1.45 deraadt 1823: However, building your own system from source code is not trivial;
1.397 ! deraadt 1824: it is nearly 850MB of source code, and problems do occur as we
1.45 deraadt 1825: transition between major releases.
1.115 ericj 1826: <li>Install a binary snapshot for your
1.80 espie 1827: architecture, which are made available fairly often. For
1.29 deraadt 1828: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1829: </ul>
1830:
1.9 deraadt 1831: <p>
1.288 matthieu 1832: <a name="reporting"></a>
1.294 david 1833: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1834:
1.5 deraadt 1835: <p> If you find a new security problem, you can mail it to
1.294 david 1836: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1837: <br>
1.5 deraadt 1838: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1839: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1840:
1.107 deraadt 1841: <p>
1.288 matthieu 1842: <a name="papers"></a>
1.294 david 1843: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1844:
1.389 lum 1845: Numerous
1846: <a href="papers/">papers</a> have been written by OpenBSD team members,
1847: many dedicated to security.
1.294 david 1848: </ul>
1.106 deraadt 1849:
1.2 deraadt 1850: <hr>
1.294 david 1851: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1852: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1853: <br>
1.397 ! deraadt 1854: <small>$OpenBSD: security.html,v 1.396 2013/08/24 16:18:51 deraadt Exp $</small>
1.1 deraadt 1855:
1.24 deraadt 1856: </body>
1857: </html>
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