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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.387 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>,
1.398 sthen 78: <a href="#53">5.3</a>,
79: <a href="#54">5.4</a>.
1.114 philen 80: </td>
81: </tr>
82: </table>
1.56 deraadt 83: <hr>
84:
1.294 david 85: <a name="goals"></a>
1.278 deraadt 86: <ul>
1.294 david 87: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 88:
1.14 deraadt 89: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 90: ONE in the industry for security (if we are not already there). Our
91: open software development model permits us to take a more
92: uncompromising view towards increased security than Sun, SGI, IBM, HP,
93: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 94: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 95: cryptography</a>, we are able to take cryptographic approaches towards
96: fixing security problems.<p>
1.18 deraadt 97:
1.288 matthieu 98: <a name="disclosure"></a>
1.294 david 99: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 100:
1.45 deraadt 101: Like many readers of the
1.196 jufi 102: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 103: BUGTRAQ mailing list</a>,
1.106 deraadt 104: we believe in full disclosure of security problems. In the
105: operating system arena, we were probably the first to embrace
106: the concept. Many vendors, even of free software, still try
107: to hide issues from their users.<p>
108:
109: Security information moves very fast in cracker circles. On the other
110: hand, our experience is that coding and releasing of proper security
111: fixes typically requires about an hour of work -- very fast fix
112: turnaround is possible. Thus we think that full disclosure helps the
113: people who really care about security.<p>
114:
1.288 matthieu 115: <a name="process"></a>
1.294 david 116: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 117:
1.12 deraadt 118: Our security auditing team typically has between six and twelve
1.45 deraadt 119: members who continue to search for and fix new security holes. We
120: have been auditing since the summer of 1996. The process we follow to
121: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 122: every critical software component. We are not so much looking for
123: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 124: years later someone discovers the problem used to be a security
1.106 deraadt 125: issue, and we fixed it because it was just a bug, well, all the
126: better. Flaws have been found in just about every area of the system.
127: Entire new classes of security problems have been found during our
128: audit, and often source code which had been audited earlier needs
129: re-auditing with these new flaws in mind. Code often gets audited
130: multiple times, and by multiple people with different auditing
131: skills.<p>
1.12 deraadt 132:
1.94 deraadt 133: Some members of our security auditing team worked for Secure Networks,
134: the company that made the industry's premier network security scanning
135: software package Ballista (Secure Networks got purchased by Network
136: Associates, Ballista got renamed to Cybercop Scanner, and well...)
137: That company did a lot of security research, and thus fit in well
1.106 deraadt 138: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
139: colours since day 1.<p>
1.31 deraadt 140:
1.34 deraadt 141: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 142: In most cases we have found that the determination of exploitability
143: is not an issue. During our ongoing auditing process we find many
144: bugs, and endeavor to fix them even though exploitability is not
145: proven. We fix the bug, and we move on to find other bugs to fix. We
146: have fixed many simple and obvious careless programming errors in code
147: and only months later discovered that the problems were in fact
148: exploitable. (Or, more likely someone on
1.197 jufi 149: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 150: would report that other operating systems were vulnerable to a `newly
151: discovered problem', and then it would be discovered that OpenBSD had
152: been fixed in a previous release). In other cases we have been saved
153: from full exploitability of complex step-by-step attacks because we
154: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 155: managed such a success is the lpd advisory that Secure Networks put out.
156: <p>
1.29 deraadt 157:
1.288 matthieu 158: <a name="newtech"></a>
1.294 david 159: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 160:
161: As we audit source code, we often invent new ways of solving problems.
162: Sometimes these ideas have been used before in some random application
163: written somewhere, but perhaps not taken to the degree that we do.
164: <p>
165:
166: <ul>
167: <li>strlcpy() and strlcat()
168: <li>Memory protection purify
169: <ul>
170: <li>W^X
171: <li>.rodata segment
172: <li>Guard pages
173: <li>Randomized malloc()
174: <li>Randomized mmap()
175: <li>atexit() and stdio protection
176: </ul>
1.295 otto 177: <li>Privilege separation
1.278 deraadt 178: <li>Privilege revocation
179: <li>Chroot jailing
180: <li>New uids
181: <li>ProPolice
182: <li>... and others
183: </ul>
184: <p>
185:
1.294 david 186: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 187:
1.45 deraadt 188: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 189: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 190: commonplace in security forums like
1.197 jufi 191: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 192:
1.45 deraadt 193: The most intense part of our security auditing happened immediately
1.80 espie 194: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 195: over the last third of 1996 and first half of 1997. Thousands (yes,
196: thousands) of security issues were fixed rapidly over this year-long
197: period; bugs like the standard buffer overflows, protocol
198: implementation weaknesses, information gathering, and filesystem
199: races. Hence most of the security problems that we encountered were
200: fixed before our 2.1 release, and then a far smaller number needed
201: fixing for our 2.2 release. We do not find as many problems anymore,
202: it is simply a case of diminishing returns. Recently the security
203: problems we find and fix tend to be significantly more obscure or
204: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 205:
1.35 deraadt 206: <ul>
1.45 deraadt 207: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 208: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 209: to search for more complicated exploits, so we will too.
210: <li>Finding and fixing subtle flaws in complicated software is
211: a lot of fun.
1.35 deraadt 212: </ul>
1.106 deraadt 213: <p>
1.15 deraadt 214:
1.14 deraadt 215: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 216: to find and fix new security flaws.<p>
1.12 deraadt 217:
1.288 matthieu 218: <a name="default"></a>
1.294 david 219: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 220:
221: To ensure that novice users of OpenBSD do not need to become security
222: experts overnight (a viewpoint which other vendors seem to have), we
223: ship the operating system in a Secure by Default mode. All non-essential
224: services are disabled. As the user/administrator becomes more familiar
225: with the system, he will discover that he has to enable daemons and other
226: parts of the system. During the process of learning how to enable a new
227: service, the novice is more likely to learn of security considerations.<p>
228:
229: This is in stark contrast to the increasing number of systems that
230: ship with NFS, mountd, web servers, and various other services enabled
231: by default, creating instantaneous security problems for their users
232: within minutes after their first install.<p>
233:
1.288 matthieu 234: <a name="crypto"></a>
1.294 david 235: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 236:
237: And of course, since the OpenBSD project is based in Canada, it is possible
238: for us to integrate cryptography. For more information, read the page
1.116 deraadt 239: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 240:
1.294 david 241: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 242:
243: <li>
1.398 sthen 244: <a name="54"></a>
245:
246: <h3><font color="#e00000">OpenBSD 5.4 Security Advisories</font></h3>
247: These are the OpenBSD 5.4 advisories -- all these problems are solved
248: in <a href=anoncvs.html>OpenBSD current</a> and the
249: <a href=stable.html>patch branch</a>.
250:
251: <p>
252: <ul>
253: <li><a href="errata54.html#002_sshgcm">November 7, 2013:
254: Memory corruption in post-authentication sshd process if AES-GCM cipher
255: is selected</a>
256: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
257: <li><a href="errata54.html#004_nginx">November 21, 2013:
258: Security restriction bypass in certain nginx(8) configurations</a>
259: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
260: <br>
1.400 ! matthieu 261: <li><a href="errata54.html#006_libXfont">January 10, 2013:
! 262: Buffer overflow in parsing of BDF font files</a>
! 263: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6463">CVE-2013-6462</a>).
1.398 sthen 264: </ul>
265:
266: <li>
1.395 sthen 267: <a name="53"></a>
268:
269: <h3><font color="#e00000">OpenBSD 5.3 Security Advisories</font></h3>
270: These are the OpenBSD 5.3 advisories -- all these problems are solved
271: in <a href=anoncvs.html>OpenBSD current</a> and the
272: <a href=stable.html>patch branch</a>.
273:
274: <p>
275: <ul>
1.398 sthen 276: <li><a href="errata53.html#009_sshgcm">November 7, 2013:
277: Memory corruption in post-authentication sshd process if AES-GCM cipher
278: is selected</a>
279: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
280: <li><a href="errata53.html#011_nginx">November 21, 2013:
281: Security restriction bypass in certain nginx(8) configurations</a>
282: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
1.395 sthen 283: </ul>
284:
1.399 deraadt 285: <br><p><b>
286: OpenBSD 5.2 and earlier releases are not supported anymore. The following
287: paragraphs only list advisories issued while they were maintained; these
288: releases are likely to be affected by the advisories for more recent releases.
289: </b><p>
290:
1.395 sthen 291: <li>
1.393 sthen 292: <a name="52"></a>
293:
294: <h3><font color="#e00000">OpenBSD 5.2 Security Advisories</font></h3>
295: These are the OpenBSD 5.2 advisories -- all these problems are solved
296: in <a href=anoncvs.html>OpenBSD current</a> and the
297: <a href=stable.html>patch branch</a>.
298:
299: <p>
300: <ul>
301: None yet!
302: </ul>
303:
304: <li>
1.390 sthen 305: <a name="51"></a>
306:
307: <h3><font color="#e00000">OpenBSD 5.1 Security Advisories</font></h3>
308: These are the OpenBSD 5.1 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>
1.393 sthen 314: <li><a href="errata51.html#001_libcrypto">April 23, 2012:
315: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 316: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.390 sthen 317: </ul>
318:
319: <li>
1.388 miod 320: <a name="50"></a>
321:
322: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
323: These are the OpenBSD 5.0 advisories -- all these problems are solved
324: in <a href=anoncvs.html>OpenBSD current</a> and the
325: <a href=stable.html>patch branch</a>.
326:
327: <p>
328: <ul>
1.393 sthen 329: <li><a href="errata50.html#002_libcrypto">April 23, 2012:
330: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 331: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.388 miod 332: </ul>
333:
334: <li>
1.387 miod 335: <a name="49"></a>
336:
337: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
338: These are the OpenBSD 4.9 advisories -- all these problems are solved
339: in <a href=anoncvs.html>OpenBSD current</a> and the
340: <a href=stable.html>patch branch</a>.
341:
342: <p>
343: <ul>
344: None yet!
345: </ul>
346:
347: <li>
348: <a name="48"></a>
349:
350: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
351: These are the OpenBSD 4.8 advisories -- all these problems are solved
352: in <a href=anoncvs.html>OpenBSD current</a> and the
353: <a href=stable.html>patch branch</a>.
354:
355: <p>
356: <ul>
357: <li><a href="errata48.html#009_pf">February 16, 2011:
358: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
359: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
360: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
361: prefixes "10.1.1.1/30") are not affected.</a>
362: <li><a href="errata48.html#008_openssl">February 11, 2011:
363: An incorrectly formatted ClientHello handshake message could cause
364: OpenSSL to parse past the end of the message. An attacker could use
365: this flaw to trigger an invalid memory access, causing a crash of an
366: application linked to OpenSSL. As well, certain applications may expose
367: the contents of parsed OCSP extensions, specifically the OCSP nonce
368: extension.
369: <br>
370: Applications are only affected if they act as a server and call
371: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
372: that nothing in the base OS uses this. Apache httpd started using this
373: in v2.3.3; this is newer than the version in ports.</a>
374: <li><a href="errata48.html#005_pf">December 17, 2010:
375: Insufficent initialization of the pf rule structure in the ioctl
376: handler may allow userland to modify kernel memory. By default root
377: privileges are needed to add or modify pf rules.</a>
378: </ul>
379:
380: <li>
1.385 jasper 381: <a name="47"></a>
382:
383: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
384: These are the OpenBSD 4.7 advisories -- all these problems are solved
385: in <a href=anoncvs.html>OpenBSD current</a> and the
386: <a href=stable.html>patch branch</a>.
387:
388: <p>
389: <ul>
1.387 miod 390: <li><a href="errata47.html#013_pf">February 16, 2011:
391: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
392: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
393: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
394: prefixes "10.1.1.1/30") are not affected.</a>
395: <li><a href="errata47.html#012_openssl">February 11, 2011:
396: An incorrectly formatted ClientHello handshake message could cause
397: OpenSSL to parse past the end of the message. An attacker could use
398: this flaw to trigger an invalid memory access, causing a crash of an
399: application linked to OpenSSL. As well, certain applications may expose
400: the contents of parsed OCSP extensions, specifically the OCSP nonce
401: extension.
402: <br>
403: Applications are only affected if they act as a server and call
404: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
405: that nothing in the base OS uses this. Apache httpd started using this
406: in v2.3.3; this is newer than the version in ports.</a>
407: <li><a href="errata47.html#009_pf">December 17, 2010:
408: Insufficent initialization of the pf rule structure in the ioctl
409: handler may allow userland to modify kernel memory. By default root
410: privileges are needed to add or modify pf rules.</a>
411: <li><a href="errata47.html#004_pfsync">April 23, 2010:
412: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 413: <li><a href="errata47.html#003_openssl">April 14, 2010:
414: In TLS connections, certain incorrectly formatted records can
415: cause an OpenSSL client or server to crash due to a read
1.392 tobias 416: attempt at NULL.</a>
1.385 jasper 417: </ul>
418:
419: <li>
1.378 jasper 420: <a name="46"></a>
421:
422: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
423: These are the OpenBSD 4.6 advisories -- all these problems are solved
424: in <a href=anoncvs.html>OpenBSD current</a> and the
425: <a href=stable.html>patch branch</a>.
426:
427: <p>
428: <ul>
1.385 jasper 429: <li><a href="errata46.html#010_openssl">April 14, 2010:
430: In TLS connections, certain incorrectly formatted records can
431: cause an OpenSSL client or server to crash due to a read
1.392 tobias 432: attempt at NULL.</a>
1.384 jasper 433: <li><a href="errata46.html#006_openssl">March 12, 2010:
434: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 435: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 436: <li><a href="errata46.html#004_openssl">November 26, 2009:
437: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 438: related to renegotiation.</a>
1.378 jasper 439: </ul>
1.382 tobias 440:
441: <li>
1.373 djm 442: <a name="45"></a>
443:
444: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
445: These are the OpenBSD 4.5 advisories -- all these problems are solved
446: in <a href=anoncvs.html>OpenBSD current</a> and the
447: <a href=stable.html>patch branch</a>.
448:
449: <p>
450: <ul>
1.385 jasper 451: <li><a href="errata45.html#016_openssl">April 14, 2010:
452: In TLS connections, certain incorrectly formatted records can
453: cause an OpenSSL client or server to crash due to a read
1.392 tobias 454: attempt at NULL.</a>
1.385 jasper 455: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 456: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 457: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 458: <li><a href="errata45.html#010_openssl">November 26, 2009:
459: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 460: related to renegotiation.</a>
1.373 djm 461: </ul>
462:
463: <li>
1.365 deraadt 464: <a name="44"></a>
465:
466: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
467: These are the OpenBSD 4.4 advisories -- all these problems are solved
468: in <a href=anoncvs.html>OpenBSD current</a> and the
469: <a href=stable.html>patch branch</a>.
470:
471: <p>
472: <ul>
1.372 millert 473: <li><a href="errata44.html#011_sudo">February 22, 2009:
474: sudo(8) may allow a user listed in sudoers to run a command
475: as a different user than their access rule specifies when a Unix
476: group is used in the RunAs portion of the rule.</a>
1.370 djm 477: <li><a href="errata44.html#008_bind">January 15, 2009:
478: named(8) suffered from a similar logic error that may allow
479: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 480: <li><a href="errata44.html#007_openssl">January 9, 2009:
481: OpenSSL suffered from some logic errors that allowed bypass
482: of DSA/ECDSA certificate validation.</a>
1.367 brad 483: <li><a href="errata44.html#001_ndp">November 2, 2008:
484: The Neighbor Discovery Protocol (ndp) did not correctly verify
485: neighbor solicitation requests maybe allowing a nearby attacker
486: to intercept traffic.</a>
1.365 deraadt 487: </ul>
488:
489: <li>
1.357 brad 490: <a name="43"></a>
491:
492: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
493: These are the OpenBSD 4.3 advisories -- all these problems are solved
494: in <a href=anoncvs.html>OpenBSD current</a> and the
495: <a href=stable.html>patch branch</a>.
496:
497: <p>
498: <ul>
1.372 millert 499: <li><a href="errata43.html#011_sudo">February 22, 2009:
500: sudo(8) may allow a user listed in sudoers to run a command
501: as a different user than their access rule specifies when a Unix
502: group is used in the RunAs portion of the rule.</a>
1.370 djm 503: <li><a href="errata43.html#008_bind">January 15, 2009:
504: named(8) suffered from a similar logic error that may allow
505: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 506: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 507: OpenSSL suffered from some logic errors that allowed bypass
508: of DSA/ECDSA certificate validation.</a>
1.382 tobias 509: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 510: The Neighbor Discovery Protocol (ndp) did not correctly verify
511: neighbor solicitation requests maybe allowing a nearby attacker
512: to intercept traffic.</a>
1.362 brad 513: <li><a href="errata43.html#004_bind">July 23, 2008:
514: A vulnerability has been found with BIND.</a>
1.361 brad 515: <li><a href="errata43.html#003_xorg">July 15, 2008:
516: Multiple vulnerabilities in X.Org.</a>
1.359 brad 517: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 518: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 519: <li><a href="errata43.html#001_openssh">March 30, 2008:
520: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 521: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 522: </ul>
523:
524: <li>
1.348 merdely 525: <a name="42"></a>
526: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
527: These are the OpenBSD 4.2 advisories -- all these problems are solved
528: in <a href=anoncvs.html>OpenBSD current</a> and the
529: <a href=stable.html>patch branch</a>.
530:
531: <p>
532: <ul>
1.364 tobias 533: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 534: The Neighbor Discovery Protocol (ndp) did not correctly verify
535: neighbor solicitation requests maybe allowing a nearby attacker
536: to intercept traffic.</a>
1.362 brad 537: <li><a href="errata42.html#013_bind">July 23, 2008:
538: A vulnerability has been found with BIND.</a>
1.361 brad 539: <li><a href="errata42.html#012_xorg2">July 15, 2008:
540: Multiple vulnerabilities in X.Org.</a>
1.359 brad 541: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 542: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 543: <li><a href="errata42.html#010_openssh">March 30, 2008:
544: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 545: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 546: <li><a href="errata42.html#009_ppp">March 7, 2008:
547: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 548: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
549: Multiple vulnerabilities in X.Org.</a>
1.351 okan 550: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
551: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 552: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 553: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 554: </ul>
555:
556: <li>
1.346 matthieu 557: <a name="41"></a>
558:
559: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
560: These are the OpenBSD 4.1 advisories -- all these problems are solved
561: in <a href=anoncvs.html>OpenBSD current</a> and the
562: <a href=stable.html>patch branch</a>.
563:
564: <p>
565: <ul>
1.359 brad 566: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 567: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 568: <li><a href="errata41.html#015_openssh">March 30, 2008:
569: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 570: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 571: <li><a href="errata41.html#014_ppp">March 7, 2008:
572: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 573: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
574: Multiple vulnerabilities in X.Org.</a>
575: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
576: The SSL_get_shared_ciphers() function in OpenSSL contains
577: an off-by-one overflow.</a>
1.350 deraadt 578: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 579: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 580: <li><a href="errata41.html#009_file">Jul 9, 2007:
581: Fix possible heap overflow in file(1).</a>
1.346 matthieu 582: <li><a href="errata41.html#005_route6">Apr 27, 2007:
583: IPv6 type 0 route headers can be used to mount a DoS attack
584: against hosts and networks.</a>
585: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
586: Multiple vulnerabilities in X.Org.</a>
587: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
588: Incorrect mbuf handling for ICMP6 packets.</a>
589: </ul>
590:
591: <li>
1.334 brad 592: <a name="40"></a>
593: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
594: These are the OpenBSD 4.0 advisories -- all these problems are solved
595: in <a href=anoncvs.html>OpenBSD current</a> and the
596: <a href=stable.html>patch branch</a>.
597:
598: <p>
599: <ul>
1.382 tobias 600: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
601: The SSL_get_shared_ciphers() function in OpenSSL contains an
602: off-by-one overflow.</a>
1.350 deraadt 603: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 604: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 605: <li><a href="errata40.html#015_file">Jul 9, 2007:
606: Fix possible heap overflow in file(1).</a>
1.343 deraadt 607: <li><a href="errata40.html#012_route6">Apr 23, 2007:
608: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 609: against hosts and networks.</a>
1.342 mbalmer 610: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
611: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 612: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
613: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 614: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 615: Insufficient validation in vga(4) may allow an attacker to gain
616: root privileges on some i386 systems.</a>
1.339 deraadt 617: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 618: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 619: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 620: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
621: found by Chris Evans.</a>
1.339 deraadt 622: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 623: Several problems have been found in OpenSSL.</a>
1.339 deraadt 624: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 625: httpd(8) does not sanitize the Expect header from an HTTP request
626: when it is reflected back in an error message, which might allow
627: cross-site scripting (XSS) style attacks.</a>
628: </ul>
629:
630: <li>
1.321 brad 631: <a name="39"></a>
632:
633: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
634: These are the OpenBSD 3.9 advisories -- all these problems are solved
635: in <a href=anoncvs.html>OpenBSD current</a> and the
636: <a href=stable.html>patch branch</a>.
637:
638: <p>
639: <ul>
1.343 deraadt 640: <li><a href="errata39.html#022_route6">Apr 23, 2007:
641: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 642: against hosts and networks.</a>
1.342 mbalmer 643: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
644: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 645: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
646: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 647: <li><a href="errata39.html#agp">Jan 3, 2007:
648: Insufficient validation in vga(4) may allow an attacker to gain
649: root privileges on some i386 systems.</a>
1.336 brad 650: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 651: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 652: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 653: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 654: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 655: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 656: found by Chris Evans.</a>
1.333 deraadt 657: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 658: Several problems have been found in OpenSSL.</a>
1.333 deraadt 659: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 660: httpd(8) does not sanitize the Expect header from an HTTP request
661: when it is reflected back in an error message, which might allow
662: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 663: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 664: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
665: possible for an attacker to construct an invalid signature which
666: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 667: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 668: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 669: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 670: Due to the failure to correctly validate LCP configuration option
671: lengths, it is possible for an attacker to send LCP packets via an
672: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 673: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 674: A problem in isakmpd(8) caused IPsec to run partly without replay
675: protection.</a>
1.333 deraadt 676: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 677: It is possible to cause the kernel to panic when more than the default
678: number of sempahores have been allocated.</a>
1.333 deraadt 679: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 680: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
681: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
682: option.</a>
1.333 deraadt 683: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 684: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 685: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 686: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
687: overflow.</a>
1.333 deraadt 688: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 689: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 690: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 691: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 692: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 693: A race condition has been reported to exist in the handling by sendmail
694: of asynchronous signals.</a>
695: </ul>
696:
697: <li>
1.318 deraadt 698: <a name="38"></a>
699:
700: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
701: These are the OpenBSD 3.8 advisories -- all these problems are solved
702: in <a href=anoncvs.html>OpenBSD current</a> and the
703: <a href=stable.html>patch branch</a>.
704:
705: <p>
706: <ul>
1.332 brad 707: <li><a href="errata38.html#ssh2">Oct 12, 2006:
708: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 709: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 710: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 711: found by Chris Evans.</a>
712: <li><a href="errata38.html#openssl2">Oct 7, 2006:
713: Several problems have been found in OpenSSL.</a>
714: <li><a href="errata38.html#httpd2">Oct 7, 2006:
715: httpd(8) does not sanitize the Expect header from an HTTP request
716: when it is reflected back in an error message, which might allow
717: cross-site scripting (XSS) style attacks.</a>
1.329 brad 718: <li><a href="errata38.html#openssl">Sep 8, 2006:
719: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
720: possible for an attacker to construct an invalid signature which
721: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 722: <li><a href="errata38.html#bind">Sep 8, 2006:
723: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 724: <li><a href="errata38.html#sppp">Sep 2, 2006:
725: Due to the failure to correctly validate LCP configuration option
726: lengths, it is possible for an attacker to send LCP packets via an
727: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 728: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
729: A problem in isakmpd(8) caused IPsec to run partly without replay
730: protection.</a>
731: <li><a href="errata38.html#sem">Aug 25, 2006:
732: It is possible to cause the kernel to panic when more than the default
733: number of sempahores have been allocated.</a>
734: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
735: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
736: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
737: option.</a>
738: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
739: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 740: <li><a href="errata38.html#httpd">Jul 30, 2006:
741: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
742: overflow.</a>
1.324 brad 743: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
744: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 745: <li><a href="errata38.html#xorg">May 2, 2006:
746: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 747: <li><a href="errata38.html#sendmail">Mar 25, 2006:
748: A race condition has been reported to exist in the handling by sendmail
749: of asynchronous signals.</a>
750: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 751: Josh Bressers has reported a weakness in OpenSSH caused due to the
752: insecure use of the system(3) function in scp(1) when performing copy
753: operations using filenames that are supplied by the user from the
754: command line.</a>
1.321 brad 755: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 756: Do not allow users to trick suid programs into re-opening files via
757: /dev/fd.</a>
1.321 brad 758: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 759: A buffer overflow has been found in the Perl interpreter with the
760: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 761: </ul>
762:
763: <li>
1.312 david 764: <a name="37"></a>
765:
766: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
767: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 768: in <a href="anoncvs.html">OpenBSD current</a>. The
769: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
770: you should update your machine.
1.312 david 771:
772: <p>
773: <ul>
1.322 brad 774: <li><a href="errata37.html#xorg">May 2, 2006:
775: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 776: <li><a href="errata37.html#sendmail">Mar 25, 2006:
777: A race condition has been reported to exist in the handling by sendmail
778: of asynchronous signals.</a>
1.320 brad 779: <li><a href="errata37.html#ssh">Feb 12, 2006:
780: Josh Bressers has reported a weakness in OpenSSH caused due to the
781: insecure use of the system(3) function in scp(1) when performing copy
782: operations using filenames that are supplied by the user from the
783: command line.</a>
1.319 brad 784: <li><a href="errata37.html#fd">Jan 5, 2006:
785: Do not allow users to trick suid programs into re-opening files via
786: /dev/fd.</a>
787: <li><a href="errata37.html#perl">Jan 5, 2006:
788: A buffer overflow has been found in the Perl interpreter with the
789: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 790: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 791: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 792: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 793: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 794: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 795: Fix a race condition in sudo(8) that could allow a user
1.315 millert 796: to run arbitrary commands.</a>
1.318 deraadt 797: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 798: Fix a buffer overflow, memory leaks, and NULL pointer
799: dereference in cvs(1).</a>
1.312 david 800: </ul>
801:
802: <li>
1.301 miod 803: <a name="36"></a>
804:
805: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
806: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 807: in <a href="anoncvs.html">OpenBSD current</a>. The
808: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
809: you should update your machine.
1.301 miod 810:
811: <p>
1.302 markus 812: <ul>
1.317 millert 813: <li><a href="errata36.html#libz2">Jul 21, 2005:
814: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 815: <li><a href="errata36.html#libz">Jul 6, 2005:
816: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 817: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 818: Fix a race condition in sudo(8) that could allow a user
1.315 millert 819: to run arbitrary commands.</a>
1.311 deraadt 820: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 821: Fix a buffer overflow, memory leaks, and NULL pointer
822: dereference in cvs(1).</a>
1.311 deraadt 823: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 824: Due to buffer overflows in telnet(1), a malicious
825: server or man-in-the-middle attack could allow
826: execution of arbitrary code with the privileges of
827: the user invoking telnet(1).</a>
1.311 deraadt 828: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 829: More stringent checking should be done in the copy(9)
830: functions to prevent their misuse.</a>
1.311 deraadt 831: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 832: More stringent checking should be done in the copy(9)
833: functions to prevent their misuse.</a>
1.311 deraadt 834: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 835: httpd(8)'s mod_include module fails to properly validate
836: the length of user supplied tag strings prior to copying
1.305 brad 837: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 838: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 839: On systems running isakmpd(8) it is possible for a local
840: user to cause kernel memory corruption and system panic by
1.303 markus 841: setting ipsec(4) credentials on a socket.</a>
1.302 markus 842: </ul>
1.301 miod 843:
844: <li>
1.288 matthieu 845: <a name="35"></a>
1.279 deraadt 846:
1.294 david 847: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 848: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 849: in <a href="anoncvs.html">OpenBSD current</a>. The
850: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
851: you should update your machine.
1.279 deraadt 852:
853: <p>
854: <ul>
1.310 brad 855: <li><a href="errata35.html#cvs4">Apr 28, 2005:
856: Fix a buffer overflow, memory leaks, and NULL pointer
857: dereference in cvs(1).</a>
1.309 brad 858: <li><a href="errata35.html#telnet">Mar 30, 2005:
859: Due to buffer overflows in telnet(1), a malicious
860: server or man-in-the-middle attack could allow
861: execution of arbitrary code with the privileges of
862: the user invoking telnet(1).</a>
1.308 brad 863: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 864: More stringent checking should be done in the copy(9)
865: functions to prevent their misuse.</a>
1.306 brad 866: <li><a href="errata35.html#locore">Feb 28, 2005:
867: More stringent checking should be done in the copy(9)
868: functions to prevent their misuse.</a>
1.304 brad 869: <li><a href="errata35.html#httpd3">Jan 12, 2005:
870: httpd(8)'s mod_include module fails to properly validate
871: the length of user supplied tag strings prior to copying
1.305 brad 872: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 873: <li><a href="errata35.html#pfkey">Dec 14, 2004:
874: On systems running isakmpd(8) it is possible for a local
875: user to cause kernel memory corruption and system panic by
1.303 markus 876: setting ipsec(4) credentials on a socket.</a>
1.301 miod 877: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 878: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 879: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 880: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 881: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 882: httpd(8)'s mod_rewrite module can be made to write one zero byte in
883: an arbitrary memory position outside of a char array, causing a DoS
884: or possibly buffer overflows.</a>
1.301 miod 885: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 886: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 887: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 888: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 889: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 890: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 891: Multiple remote vulnerabilities have been found in the cvs(1)
892: server which can be used by CVS clients to crash or execute
1.293 brad 893: arbitrary code on the server.</a>
1.301 miod 894: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 895: kdc(8) performs inadequate checking of request fields, leading
896: to the possibility of principal impersonation from other
897: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 898: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 899: xdm(1) ignores the requestPort resource and creates a
1.293 brad 900: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 901: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 902: A buffer overflow in the cvs(1) server has been found,
903: which can be used by CVS clients to execute arbitrary code on
1.293 brad 904: the server.</a>
1.301 miod 905: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 906: Integer overflow problems were found in procfs, allowing
1.293 brad 907: reading of arbitrary kernel memory.</a>
1.301 miod 908: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 909: Pathname validation problems have been found in cvs(1),
910: allowing clients and servers access to files outside the
1.293 brad 911: repository or local CVS tree.</a>
1.279 deraadt 912: </ul>
913:
914: <p>
915: <li>
1.288 matthieu 916: <a name="34"></a>
1.261 david 917:
1.294 david 918: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 919: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 920: in <a href="anoncvs.html">OpenBSD current</a>. The
921: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
922: you should update your machine.
1.261 david 923: <p>
924: <ul>
1.302 markus 925: <li><a href="errata34.html#pfkey">Dec 14, 2004:
926: On systems running isakmpd(8) it is possible for a local
927: user to cause kernel memory corruption and system panic by
1.303 markus 928: setting ipsec(4) credentials on a socket.</a>
1.298 brad 929: <li><a href="errata34.html#xpm">Sep 16, 2004:
930: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 931: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
932: httpd(8)'s mod_rewrite module can be made to write one zero byte in
933: an arbitrary memory position outside of a char array, causing a DoS
934: or possibly buffer overflows.</a>
1.294 david 935: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 936: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 937: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 938: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 939: an attacker can delete IPsec tunnels at will.</a>
1.294 david 940: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 941: Multiple remote vulnerabilities have been found in the cvs(1)
942: server which can be used by CVS clients to crash or execute
1.293 brad 943: arbitrary code on the server.</a>
1.294 david 944: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 945: kdc(8) performs inadequate checking of request fields, leading
946: to the possibility of principal impersonation from other
947: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 948: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 949: A buffer overflow in the cvs(1) server has been found,
950: which can be used by CVS clients to execute arbitrary code on
951: the server.</a>
1.294 david 952: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 953: Integer overflow problems were found in procfs, allowing
954: reading of arbitrary kernel memory.</a>
1.294 david 955: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 956: Pathname validation problems have been found in cvs(1),
957: allowing clients and servers access to files outside the
958: repository or local CVS tree.</a>
1.294 david 959: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 960: A missing check for a NULL-pointer dereference may allow a
1.281 otto 961: remote attacker to crash applications using OpenSSL.</a>
1.294 david 962: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 963: Defects in the payload validation and processing functions of
964: isakmpd have been discovered. An attacker could send malformed
965: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 966: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 967: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
968: access module, using IP addresses without a netmask on big endian
969: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 970: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 971: An IPv6 MTU handling problem exists that could be used by an
972: attacker to cause a denial of service attack.</a>
1.294 david 973: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 974: A reference counting bug in shmat(2) could be used to write to
975: kernel memory under certain circumstances.</a>
1.294 david 976: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 977: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 978: by Thomas Walpuski.</a>
1.294 david 979: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 980: It may be possible for a local user to overrun the stack in
981: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 982: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 983: The use of certain ASN.1 encodings or malformed public keys may
984: allow an attacker to mount a denial of service attack against
985: applications linked with ssl(3).</a>
1.261 david 986: </ul>
987:
988: <li>
1.288 matthieu 989: <a name="33"></a>
1.246 deraadt 990:
1.294 david 991: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 992: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 993: in <a href="anoncvs.html">OpenBSD current</a>. The
994: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 995: you should update your machine.
1.246 deraadt 996: <p>
997: <ul>
1.294 david 998: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 999: Pathname validation problems have been found in cvs(1),
1000: allowing clients and servers access to files outside the
1001: repository or local CVS tree.</a>
1.294 david 1002: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 1003: A missing check for a NULL-pointer dereference may allow a
1.281 otto 1004: remote attacker to crash applications using OpenSSL.</a>
1.294 david 1005: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 1006: Defects in the payload validation and processing functions of
1007: isakmpd have been discovered. An attacker could send malformed
1008: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 1009: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 1010: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
1011: access module, using IP addresses without a netmask on big endian
1012: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 1013: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 1014: An IPv6 MTU handling problem exists that could be used by an
1015: attacker to cause a denial of service attack.</a>
1.294 david 1016: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 1017: A reference counting bug in shmat(2) could be used to write to
1018: kernel memory under certain circumstances.</a>
1.294 david 1019: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 1020: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 1021: by Thomas Walpuski.</a>
1.294 david 1022: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 1023: It may be possible for a local user to execute arbitrary code
1024: resulting in escalation of privileges due to a stack overrun
1025: in compat_ibcs2(8).</a>
1.294 david 1026: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 1027: The use of certain ASN.1 encodings or malformed public keys may
1028: allow an attacker to mount a denial of service attack against
1029: applications linked with ssl(3).</a>
1.294 david 1030: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 1031: Access of freed memory in pf(4) could be used to
1.260 margarid 1032: remotely panic a machine using scrub rules.</a>
1.294 david 1033: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 1034: A buffer overflow in the address parsing in
1035: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1036: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 1037: OpenSSH versions prior to 3.7 contains a buffer management error
1038: that is potentially exploitable.</a>
1.294 david 1039: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 1040: Root may be able to reduce the security level by taking advantage of
1041: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 1042: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 1043: An improper bounds check in the kernel may allow a local user
1044: to panic the kernel.</a>
1.294 david 1045: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 1046: An off-by-one error exists in the C library function realpath(3)
1047: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 1048: </ul>
1049:
1.265 miod 1050:
1.247 david 1051: <p>
1.246 deraadt 1052: <li>
1.288 matthieu 1053: <a name="32"></a>
1.224 deraadt 1054:
1.294 david 1055: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 1056: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 1057: in <a href="anoncvs.html">OpenBSD current</a>. The
1058: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 1059: you should update your machine.
1.224 deraadt 1060: <p>
1061: <ul>
1.294 david 1062: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 1063: The use of certain ASN.1 encodings or malformed public keys may
1064: allow an attacker to mount a denial of service attack against
1065: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 1066: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 1067: Access of freed memory in pf(4) could be used to
1.260 margarid 1068: remotely panic a machine using scrub rules.</a>
1.294 david 1069: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 1070: A buffer overflow in the address parsing in
1071: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1072: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 1073: OpenSSH versions prior to 3.7 contains a buffer management error
1074: that is potentially exploitable.</a>
1.294 david 1075: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 1076: Fix for a potential security issue in
1077: sendmail(8) with respect to DNS maps.</a>
1.294 david 1078: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1079: An off-by-one error exists in the C library function realpath(3)
1080: may allow an attacker to gain escalated privileges.</a>
1.294 david 1081: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1082: A buffer overflow in the address parsing in
1083: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1084: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1085: A cryptographic weaknesses in the Kerberos v4 protocol can be
1086: exploited on Kerberos v5 as well.</a>
1.294 david 1087: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1088: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1089: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1090: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1091: Various SSL and TLS operations in OpenSSL are vulnerable to
1092: timing attacks.</a>
1.294 david 1093: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1094: A buffer overflow in lprm(1) may allow an attacker to elevate
1.392 tobias 1095: privileges to user daemon.</a>
1.294 david 1096: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1097: A buffer overflow in the envelope comments processing in
1098: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1099: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1100: httpd(8) leaks file inode numbers via ETag header as well as
1101: child PIDs in multipart MIME boundary generation. This could
1102: lead, for example, to NFS exploitation because it uses inode
1103: numbers as part of the file handle.</a>
1.294 david 1104: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1105: In ssl(8) an information leak can occur via timing by performing
1106: a MAC computation even if incorrect block cipher padding has
1107: been found, this is a countermeasure. Also, check for negative
1108: sizes, in allocation routines.</a>
1.294 david 1109: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1110: A double free exists in cvs(1) that could lead to privilege
1111: escalation for cvs configurations where the cvs command is
1.233 margarid 1112: run as a privileged user.</a>
1.294 david 1113: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1114: A buffer overflow exists in named(8) that could lead to a
1115: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1116: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1117: A logic error in the pool kernel memory allocator could cause
1118: memory corruption in low-memory situations, causing the system
1119: to crash.</a>
1.294 david 1120: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1121: An attacker can bypass smrsh(8)'s restrictions and execute
1122: arbitrary commands with the privileges of his own account.</a>
1.294 david 1123: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1124: Network bridges running pf with scrubbing enabled could cause
1125: mbuf corruption, causing the system to crash.</a>
1.294 david 1126: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1127: A buffer overflow can occur in the kadmind(8) daemon, leading
1128: to possible remote crash or exploit.</a>
1.224 deraadt 1129: </ul>
1130:
1.227 miod 1131: <p>
1132: <li>
1.288 matthieu 1133: <a name="31"></a>
1.203 deraadt 1134:
1.294 david 1135: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1136: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1137: in <a href="anoncvs.html">OpenBSD current</a>. The
1138: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1139: you should update your machine.
1.203 deraadt 1140:
1141: <p>
1142: <ul>
1.294 david 1143: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1144: A buffer overflow in the address parsing in
1145: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1146: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1147: A cryptographic weaknesses in the Kerberos v4 protocol can be
1148: exploited on Kerberos v5 as well.</a>
1.294 david 1149: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1150: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1151: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1152: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1153: Various SSL and TLS operations in OpenSSL are vulnerable to
1154: timing attacks.</a>
1.294 david 1155: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1156: A buffer overflow in lprm(1) may allow an attacker to gain
1157: root privileges.</a>
1.294 david 1158: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1159: A buffer overflow in the envelope comments processing in
1160: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1161: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1162: In ssl(8) an information leak can occur via timing by performing
1163: a MAC computation even if incorrect block cipher padding has
1164: been found, this is a countermeasure. Also, check for negative
1165: sizes, in allocation routines.</a>
1.294 david 1166: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1167: A double free exists in cvs(1) that could lead to privilege
1168: escalation for cvs configurations where the cvs command is
1.392 tobias 1169: run as a privileged user.</a>
1.294 david 1170: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1171: A buffer overflow exists in named(8) that could lead to a
1172: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1173: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1174: Incorrect argument checking in the getitimer(2) system call
1175: may allow an attacker to crash the system.</a>
1.294 david 1176: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1177: An attacker can bypass smrsh(8)'s restrictions and execute
1178: arbitrary commands with the privileges of his own account.</a>
1.294 david 1179: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1180: A buffer overflow can occur in the kadmind(8) daemon, leading
1181: to possible remote crash or exploit.</a>
1.294 david 1182: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1183: Incorrect argument checking in the setitimer(2) system call
1184: may allow an attacker to write to kernel memory.</a>
1.294 david 1185: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1186: An insufficient boundary check in the select system call
1.220 miod 1187: allows an attacker to overwrite kernel memory and execute arbitrary code
1188: in kernel context.</a>
1.294 david 1189: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1190: Several remote buffer overflows can occur in the SSL2 server and SSL3
1191: client of the ssl(8) library, as in the ASN.1 parser code in the
1192: crypto(3) library, all of them being potentially remotely
1193: exploitable.</a>
1.294 david 1194: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1195: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1196: possible remote crash.</a>
1.294 david 1197: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1198: A race condition exists in the pppd(8) daemon which may cause it to
1199: alter the file permissions of an arbitrary file.</a>
1.294 david 1200: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1201: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1202: crash.</a>
1.294 david 1203: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1204: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1205: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1206: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1207: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1208: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1209: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1210: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1211: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1212: input validation error that can result in an integer overflow and
1213: privilege escalation.</a>
1.294 david 1214: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1215: A buffer overflow can occur during the interpretation of chunked
1216: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1217: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1218: Under certain conditions, on systems using YP with netgroups
1219: in the password database, it is possible that sshd(8) does
1220: ACL checks for the requested user name but uses the password
1221: database entry of a different user for authentication. This
1222: means that denied users might authenticate successfully
1223: while permitted users could be locked out.</a>
1.294 david 1224: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1225: A race condition exists that could defeat the kernel's
1226: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1227: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1228: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1229: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1230: A local user can gain super-user privileges due to a buffer
1231: overflow in sshd(8) if AFS has been configured on the system
1232: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1233: in the sshd_config file.</a>
1.203 deraadt 1234: </ul>
1235:
1.235 miod 1236: <p>
1.203 deraadt 1237: <li>
1.288 matthieu 1238: <a name="30"></a>
1.187 deraadt 1239:
1.294 david 1240: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1241: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1242: in <a href="anoncvs.html">OpenBSD current</a>. The
1243: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1244: you should update your machine.
1.187 deraadt 1245:
1246: <p>
1247: <ul>
1.294 david 1248: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1249: A buffer overflow exists in named(8) that could lead to a
1250: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1251: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1252: Incorrect argument checking in the getitimer(2) system call
1253: may allow an attacker to crash the system.</a>
1.294 david 1254: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1255: An attacker can bypass smrsh(8)'s restrictions and execute
1256: arbitrary commands with the privileges of his own account.</a>
1.294 david 1257: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1258: A buffer overflow can occur in the kadmind(8) daemon, leading
1259: to possible remote crash or exploit.</a>
1.294 david 1260: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1261: Incorrect argument checking in the setitimer(2) system call
1262: may allow an attacker to write to kernel memory.</a>
1.294 david 1263: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1264: An insufficient boundary check in the select and poll system calls
1265: allows an attacker to overwrite kernel memory and execute arbitrary code
1266: in kernel context.</a>
1.294 david 1267: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1268: Several remote buffer overflows can occur in the SSL2 server and SSL3
1269: client of the ssl(8) library, as in the ASN.1 parser code in the
1270: crypto(3) library, all of them being potentially remotely
1271: exploitable.</a>
1.294 david 1272: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1273: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1274: possible remote crash.</a>
1.294 david 1275: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1276: A race condition exists in the pppd(8) daemon which may cause it to
1277: alter the file permissions of an arbitrary file.</a>
1.294 david 1278: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1279: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1280: crash.</a>
1.294 david 1281: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1282: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1283: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1284: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1285: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1286: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1287: input validation error that can result in an integer overflow and
1288: privilege escalation.</a>
1.294 david 1289: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1290: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1291: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1292: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1293: A buffer overflow can occur during the interpretation of chunked
1294: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1295: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1296: A race condition exists that could defeat the kernel's
1297: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1298: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1299: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1300: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1301: A local user can gain super-user privileges due to a buffer
1302: overflow in sshd(8) if AFS has been configured on the system
1303: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1304: in the sshd_config file.</a>
1.294 david 1305: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1306: The mail(1) was interpreting tilde escapes even when invoked
1307: in non-interactive mode. As mail(1) is called as root from cron,
1308: this can lead to a local root compromise.</a>
1.294 david 1309: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1310: Under certain conditions, on systems using YP with netgroups in
1311: the password database, it is possible for the rexecd(8) and rshd(8)
1312: daemons to execute a shell from a password database entry for a
1313: different user. Similarly, atrun(8) may change to the wrong
1314: home directory when running jobs.</a>
1.294 david 1315: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1316: A potential double free() exists in the zlib library;
1317: this is not exploitable on OpenBSD.
1318: The kernel also contains a copy of zlib; it is not
1319: currently known if the kernel zlib is exploitable.</a>
1.294 david 1320: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1321: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1322: may allow a local user to gain super-user privileges.</a>
1.294 david 1323: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1324: A race condition between the ptrace(2) and execve(2) system calls
1325: allows an attacker to modify the memory contents of suid/sgid
1326: processes which could lead to compromise of the super-user account.</a>
1.294 david 1327: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1328: There is a security hole in sudo(8) that can be exploited
1329: when the Postfix sendmail replacement is installed that may
1330: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1331: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1332: An attacker can trick a machine running the lpd daemon into
1333: creating new files in the root directory from a machine with
1334: remote line printer access.</a>
1.294 david 1335: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1336: The vi.recover script can be abused in such a way as
1337: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1338: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1339: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1340: resulting in a crash.</a>
1.294 david 1341: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1342: A security hole that may allow an attacker to partially authenticate
1343: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1344: </ul>
1345:
1346: <p>
1347: <li>
1.288 matthieu 1348: <a name="29"></a>
1.173 deraadt 1349:
1.294 david 1350: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1351: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1352: in <a href="anoncvs.html">OpenBSD current</a>. The
1353: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1354: you should update your machine.
1355:
1.173 deraadt 1356:
1357: <p>
1358: <ul>
1.294 david 1359: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1360: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1361: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1362: A race condition exists that could defeat the kernel's
1363: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1364: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1365: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1366: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1367: A local user can gain super-user privileges due to a buffer
1368: overflow in sshd(8) if AFS has been configured on the system
1369: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1370: in the sshd_config file.</a>
1.294 david 1371: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1372: The mail(1) was interpreting tilde escapes even when invoked
1373: in non-interactive mode. As mail(1) is called as root from cron,
1374: this can lead to a local root compromise.</a>
1.294 david 1375: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1376: A potential double free() exists in the zlib library;
1377: this is not exploitable on OpenBSD.
1378: The kernel also contains a copy of zlib; it is not
1379: currently known if the kernel zlib is exploitable.</a>
1.294 david 1380: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1381: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1382: may allow a local user to gain super-user privileges.</a>
1.294 david 1383: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1384: A race condition between the ptrace(2) and execve(2) system calls
1385: allows an attacker to modify the memory contents of suid/sgid
1386: processes which could lead to compromise of the super-user account.</a>
1.294 david 1387: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1388: There is a security hole in sudo(8) that can be exploited
1389: when the Postfix sendmail replacement is installed that may
1390: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1391: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1392: An attacker can trick a machine running the lpd daemon into
1393: creating new files in the root directory from a machine with
1394: remote line printer access.</a>
1.294 david 1395: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1396: The vi.recover script can be abused in such a way as
1397: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1398: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1399: A security hole exists in uuxqt(8) that may allow an
1400: attacker to gain root privileges.</a>
1.294 david 1401: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1402: A security hole exists in lpd(8) that may allow an
1403: attacker to gain root privileges if lpd is running.</a>
1.294 david 1404: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1405: A security hole exists in sendmail(8) that may allow an
1406: attacker on the local host to gain root privileges.</a>
1.294 david 1407: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1408: A kernel buffer overflow in the NFS code can be used to execute
1409: arbitrary code by users with mount privileges (only root by
1.181 millert 1410: default).</a>
1.294 david 1411: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1412: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1413: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1414: sshd(8) allows users to delete arbitrary files named "cookies"
1415: if X11 forwarding is enabled. X11 forwarding is disabled
1416: by default.</a>
1.294 david 1417: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1418: Programs using the fts routines can be tricked into changing
1419: into the wrong directory.</a>
1.294 david 1420: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1421: Sendmail signal handlers contain unsafe code,
1422: leading to numerous race conditions.</a>
1.173 deraadt 1423: </ul>
1424:
1425: <p>
1426: <li>
1.288 matthieu 1427: <a name="28"></a>
1.152 deraadt 1428:
1.294 david 1429: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1430: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1431: in <a href="anoncvs.html">OpenBSD current</a>. The
1432: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1433: you should update your machine.
1434:
1.152 deraadt 1435:
1436: <p>
1437: <ul>
1.294 david 1438: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1439: A security hole exists in uuxqt(8) that may allow an
1440: attacker to gain root privileges.</a>
1.294 david 1441: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1442: A security hole exists in lpd(8) that may allow an
1443: attacker to gain root privileges if lpd is running.</a>
1.294 david 1444: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1445: A security hole exists in sendmail(8) that may allow an
1446: attacker on the local host to gain root privileges.</a>
1.294 david 1447: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1448: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1449: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1450: Programs using the fts routines can be tricked into changing
1451: into the wrong directory.</a>
1.294 david 1452: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1453: Sendmail signal handlers contain unsafe code,
1454: leading to numerous race conditions.</a>
1.294 david 1455: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1456: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1457: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1458: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1459: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1460: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1461: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1462: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1463: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1464: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1465: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1466: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1467: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1468: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1469: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1470: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1471: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1472: rnd(4) did not use all of its input when written to.</a>
1.294 david 1473: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1474: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1475: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1476: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1477: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1478: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1479: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1480: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1481: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1482: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1483: </ul>
1484:
1485: <p>
1486: <li>
1.288 matthieu 1487: <a name="27"></a>
1.124 deraadt 1488:
1.294 david 1489: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1490: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1491: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1492: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1493:
1494: <p>
1495: <ul>
1.294 david 1496: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1497: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1498: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1499: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1500: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1501: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1502: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1503: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1504: (patch included)</a>
1.294 david 1505: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1506: X11 libraries have 2 potential overflows in xtrans code.
1507: (patch included)</a>
1.294 david 1508: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1509: Apache mod_rewrite and mod_vhost_alias modules could expose files
1510: on the server in certain configurations if used.
1511: (patch included)</a>
1.294 david 1512: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1513: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1514: TERMPATH and TERMCAP environment variables as it should.
1515: (patch included)</a>
1.294 david 1516: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1517: There are printf-style format string bugs in several privileged
1518: programs. (patch included)</a>
1.294 david 1519: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1520: libcurses honored terminal descriptions in the $HOME/.terminfo
1521: directory as well as in the TERMCAP environment variable for
1522: setuid and setgid applications.
1.146 deraadt 1523: (patch included)</a>
1.294 david 1524: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1525: A format string vulnerability exists in talkd(8).
1526: (patch included)</a>
1.294 david 1527: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1528: A format string vulnerability exists in the pw_error() function of the
1529: libutil library, yielding localhost root through chpass(1).
1530: (patch included)</a>
1.294 david 1531: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1532: Bad ESP/AH packets could cause a crash under certain conditions.
1533: (patch included)</a>
1.294 david 1534: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1535: A format string vulnerability (localhost root) exists in xlock(1).
1536: (patch included)</a>
1.294 david 1537: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1538: Various bugs found in X11 libraries have various side effects, almost
1539: completely denial of service in OpenBSD.
1540: (patch included)</a>
1.294 david 1541: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1542: Just like pretty much all the other unix ftp daemons
1543: on the planet, ftpd had a remote root hole in it.
1544: Luckily, ftpd was not enabled by default.
1.137 deraadt 1545: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1546: (patch included)</a>
1.294 david 1547: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1548: Mopd, very rarely used, contained some buffer overflows.
1549: (patch included)</a>
1.294 david 1550: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1551: libedit would check for a <b>.editrc</b> file in the current
1552: directory. Not known to be a real security issue, but a patch
1553: is available anyways.
1554: (patch included)</a>
1.294 david 1555: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1556: A serious bug in dhclient(8) could allow strings from a
1557: malicious dhcp server to be executed in the shell as root.
1558: (patch included)</a>
1.294 david 1559: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1560: A serious bug in isakmpd(8) policy handling wherein
1561: policy verification could be completely bypassed in isakmpd.
1562: (patch included)</a>
1.294 david 1563: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1564: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1565: should not be used, and results in security problems on
1566: other operating systems.</a>
1.294 david 1567: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1568: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1569: (patch included)</a>
1.294 david 1570: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1571: Improper use of ipf <i>keep-state</i> rules can result
1572: in firewall rules being bypassed. (patch included)</a>
1573:
1.124 deraadt 1574: </ul>
1575:
1576: <p>
1577: <li>
1.288 matthieu 1578: <a name="26"></a>
1.119 deraadt 1579:
1.294 david 1580: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1581: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1582: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1583: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1584:
1585: <p>
1586: <ul>
1.294 david 1587: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1588: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1589: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1590: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1591: Improper use of ipf <i>keep-state</i> rules can result
1592: in firewall rules being bypassed. (patch included)</a>
1.294 david 1593: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1594: xlockmore has a bug which a localhost attacker can use to gain
1595: access to the encrypted root password hash (which is normally
1.245 miod 1596: encoded using blowfish</a> (see
1.294 david 1597: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1598: crypt(3)</a>)
1.245 miod 1599: (patch included).
1.294 david 1600: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1601: Systems running with procfs enabled and mounted are
1602: vulnerable to a very tricky exploit. procfs is not
1603: mounted by default.
1604: (patch included).</a>
1.294 david 1605: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1606: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1607: thus exposing the system to a race where the aliases file
1608: did not exist.
1.119 deraadt 1609: (patch included).</a>
1.294 david 1610: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1611: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1612: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1613: A buffer overflow in the RSAREF code included in the
1614: USA version of libssl, is possibly exploitable in
1615: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1616: (patch included).<br></a>
1617: <strong>Update:</strong> Turns out that this was not exploitable
1618: in any of the software included in OpenBSD 2.6.
1.294 david 1619: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1620: Any user could change interface media configurations, resulting in
1621: a localhost denial of service attack.
1.121 deraadt 1622: (patch included).</a>
1.119 deraadt 1623: </ul>
1624:
1625: <p>
1626: <li>
1.288 matthieu 1627: <a name="25"></a>
1.106 deraadt 1628:
1.294 david 1629: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1630: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1631: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1632: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1633:
1.96 deraadt 1634: <p>
1.104 deraadt 1635: <ul>
1.294 david 1636: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1637: In cron(8), make sure argv[] is NULL terminated in the
1638: fake popen() and run sendmail as the user, not as root.
1639: (patch included).</a>
1.294 david 1640: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1641: filesystems had an overrun in their handling of uio_offset
1642: in their readdir() routines. (These filesystems are not
1643: enabled by default). (patch included).</a>
1.294 david 1644: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1645: when we execve() a new process. (patch included).</a>
1.294 david 1646: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1647: been handled by IPsec may be transmitted as cleartext.
1648: PF_KEY SA expirations may leak kernel resources.
1649: (patch included).</a>
1.294 david 1650: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1651: motd re-writing and change the find(1) to use -execdir
1652: (patch included).</a>
1.294 david 1653: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1654: users to chflags(2) or fchflags(2) on character or block devices
1655: which they may currently be the owner of (patch included).</a>
1.294 david 1656: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1657: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1658: </ul>
1659:
1.106 deraadt 1660: <p>
1661: <li>
1.288 matthieu 1662: <a name="24"></a>
1.235 miod 1663:
1.294 david 1664: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1665: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1666: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1667: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1668:
1.96 deraadt 1669: <p>
1.75 deraadt 1670: <ul>
1.294 david 1671: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1672: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1673: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1674: another kernel crash case caused by the <strong>crashme</strong>
1675: program (patch included).</a>
1.294 david 1676: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1677: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1678: (patch included).</a>
1.294 david 1679: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1680: existed in ping(8). (patch included).</a>
1.294 david 1681: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1682: the ipq, which could permit an attacker to cause a crash.
1683: (patch included).</a>
1.294 david 1684: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1685: kernel between accept(2) and select(2) could permit an attacker
1686: to hang sockets from remote.
1687: (patch included).</a>
1.294 david 1688: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1689: bog the machine excessively and cause problems.
1690: (patch included).</a>
1.294 david 1691: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1692: DDB interacted to possibly cause a crash.
1693: (patch included).</a>
1.294 david 1694: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1695: (patch included).</a>
1.294 david 1696: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1697: problem in bootpd(8). (patch included).</a>
1.294 david 1698: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1699: exploitable problem relating to environment variables in termcap
1700: and curses. (patch included).</a>
1.294 david 1701: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1702: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1703: </ul>
1704:
1.106 deraadt 1705: <p>
1706: <li>
1.288 matthieu 1707: <a name="23"></a>
1.235 miod 1708:
1.294 david 1709: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1710: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1711: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1712: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1713:
1.96 deraadt 1714: <p>
1.53 matthieu 1715: <ul>
1.294 david 1716: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1717: problem in bootpd(8). (patch included).</a>
1.294 david 1718: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1719: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1720: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1721: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1722: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1723: chpass(1) has a file descriptor leak which allows an
1724: attacker to modify /etc/master.passwd.</a>
1.294 david 1725: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1726: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1727: should not be executed with fd slots 0, 1, or 2 free.
1728: (patch included).</a>
1.294 david 1729: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1730: libraries (patches included).</a>
1.294 david 1731: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1732: processes too permissive (4th revision patch included).</a>
1.294 david 1733: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1734: of immutable and append-only file flags. (patch included).</a>
1.294 david 1735: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1736: if IPSEC is enabled (patch included).</a>
1.294 david 1737: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1738: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1739: </ul>
1.9 deraadt 1740:
1.106 deraadt 1741: <p>
1742: <li>
1.288 matthieu 1743: <a name="22"></a>
1.235 miod 1744:
1.294 david 1745: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1746: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1747: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1748: still exist in other operating systems. (The supplied patches are for
1749: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1750:
1.96 deraadt 1751: <p>
1.9 deraadt 1752: <ul>
1.294 david 1753: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1754: packets if IPSEC is enabled (patch included).</a>
1.294 david 1755: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1756: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1757: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1758: (patch included).</a>
1.294 david 1759: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1760: (patch included).</a>
1.294 david 1761: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1762: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1763: (patch included).</a>
1.294 david 1764: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1765: export (patch included).</a>
1.112 philen 1766: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1767: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1768: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1769: Acceptance.</a>
1.294 david 1770: A patch is available <a href="errata22.html#sourceroute">here</a>.
1771: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1772: flaw (patch included).</a>
1.294 david 1773: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1774: </ul>
1775:
1.106 deraadt 1776: <p>
1777: <li>
1.288 matthieu 1778: <a name="21"></a>
1.235 miod 1779:
1.294 david 1780: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1781: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1782: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1783: exist in other operating systems. (If you are running OpenBSD 2.1, we
1784: would strongly recommend an upgrade to the newest release, as this
1785: patch list only attempts at fixing the most important security
1786: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1787: security problems. Many of those problems were solved in ways which
1788: make it hard for us to provide patches).
1789:
1.96 deraadt 1790: <p>
1.52 deraadt 1791: <ul>
1.112 philen 1792: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1793: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1794: (patch included)</a>
1.112 philen 1795: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1796: </ul>
1.51 deraadt 1797:
1.106 deraadt 1798: <p>
1799: <li>
1.288 matthieu 1800: <a name="20"></a>
1.235 miod 1801:
1.294 david 1802: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1803: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1804: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1805: exist in other operating systems. (If you are running OpenBSD 2.0, we
1806: commend you for being there back in the old days!, but you're really
1807: missing out if you don't install a new version!)
1808:
1809: <p>
1810: <ul>
1.112 philen 1811: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1812: resolver (patch included)</a>
1813: <li>Many others... if people can hunt them down, please let me know
1814: and we'll put them up here.
1815: </ul>
1.51 deraadt 1816: <p>
1.106 deraadt 1817:
1.288 matthieu 1818: <a name="watching"></a>
1.294 david 1819: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1820:
1.21 deraadt 1821: Since we take a proactive stance with security, we are continually
1822: finding and fixing new security problems. Not all of these problems
1.80 espie 1823: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1824: confirmed to be exploitable; many simple bugs we fix do turn out to
1825: have security consequences we could not predict. We do not have the
1826: time resources to make these changes available in the above format.<p>
1.21 deraadt 1827:
1828: Thus there are usually minor security fixes in the current source code
1829: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1830: guarantee that these problems are of minimal impact and unproven
1.44 ian 1831: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1832: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1833:
1.45 deraadt 1834: People who are really concerned with security can do a number of
1835: things:<p>
1.21 deraadt 1836:
1837: <ul>
1838: <li>If you understand security issues, watch our
1.294 david 1839: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1840: eye out for things which appear security related. Since
1.21 deraadt 1841: exploitability is not proven for many of the fixes we make,
1842: do not expect the relevant commit message to say "SECURITY FIX!".
1843: If a problem is proven and serious, a patch will be available
1844: here very shortly after.
1.161 horacio 1845: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1846: security-announce mailing list</a> which will notify you for every
1.186 ian 1847: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1848: and instruct you on how to patch the problem.
1.21 deraadt 1849: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1850: complete system build from time to time (read /usr/src/Makefile
1851: carefully). Users can make the assumption that the current
1852: source tree always has stronger security than the previous release.
1.45 deraadt 1853: However, building your own system from source code is not trivial;
1.397 deraadt 1854: it is nearly 850MB of source code, and problems do occur as we
1.45 deraadt 1855: transition between major releases.
1.115 ericj 1856: <li>Install a binary snapshot for your
1.80 espie 1857: architecture, which are made available fairly often. For
1.29 deraadt 1858: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1859: </ul>
1860:
1.9 deraadt 1861: <p>
1.288 matthieu 1862: <a name="reporting"></a>
1.294 david 1863: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1864:
1.5 deraadt 1865: <p> If you find a new security problem, you can mail it to
1.294 david 1866: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1867: <br>
1.5 deraadt 1868: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1869: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1870:
1.107 deraadt 1871: <p>
1.288 matthieu 1872: <a name="papers"></a>
1.294 david 1873: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1874:
1.389 lum 1875: Numerous
1876: <a href="papers/">papers</a> have been written by OpenBSD team members,
1877: many dedicated to security.
1.294 david 1878: </ul>
1.106 deraadt 1879:
1.2 deraadt 1880: <hr>
1.294 david 1881: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1882: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1883: <br>
1.400 ! matthieu 1884: <small>$OpenBSD: security.html,v 1.399 2013/11/22 16:07:41 deraadt Exp $</small>
1.1 deraadt 1885:
1.24 deraadt 1886: </body>
1887: </html>
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