Annotation of www/security.html, Revision 1.398
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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>
! 261: </ul>
! 262:
! 263: <li>
1.395 sthen 264: <a name="53"></a>
265:
266: <h3><font color="#e00000">OpenBSD 5.3 Security Advisories</font></h3>
267: These are the OpenBSD 5.3 advisories -- all these problems are solved
268: in <a href=anoncvs.html>OpenBSD current</a> and the
269: <a href=stable.html>patch branch</a>.
270:
271: <p>
272: <ul>
1.398 ! sthen 273: <li><a href="errata53.html#009_sshgcm">November 7, 2013:
! 274: Memory corruption in post-authentication sshd process if AES-GCM cipher
! 275: is selected</a>
! 276: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
! 277: <li><a href="errata53.html#011_nginx">November 21, 2013:
! 278: Security restriction bypass in certain nginx(8) configurations</a>
! 279: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
1.395 sthen 280: </ul>
281:
282: <li>
1.393 sthen 283: <a name="52"></a>
284:
285: <h3><font color="#e00000">OpenBSD 5.2 Security Advisories</font></h3>
286: These are the OpenBSD 5.2 advisories -- all these problems are solved
287: in <a href=anoncvs.html>OpenBSD current</a> and the
288: <a href=stable.html>patch branch</a>.
289:
290: <p>
291: <ul>
292: None yet!
293: </ul>
294:
1.395 sthen 295: <p>
296: OpenBSD 5.1 and earlier releases are not supported anymore. The following
297: paragraphs only list advisories issued while they were maintained; these
298: releases are likely to be affected by the advisories for more recent releases.
299: <br>
300:
1.393 sthen 301: <li>
1.390 sthen 302: <a name="51"></a>
303:
304: <h3><font color="#e00000">OpenBSD 5.1 Security Advisories</font></h3>
305: These are the OpenBSD 5.1 advisories -- all these problems are solved
306: in <a href=anoncvs.html>OpenBSD current</a> and the
307: <a href=stable.html>patch branch</a>.
308:
309: <p>
310: <ul>
1.393 sthen 311: <li><a href="errata51.html#001_libcrypto">April 23, 2012:
312: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 313: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.390 sthen 314: </ul>
315:
316: <li>
1.388 miod 317: <a name="50"></a>
318:
319: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
320: These are the OpenBSD 5.0 advisories -- all these problems are solved
321: in <a href=anoncvs.html>OpenBSD current</a> and the
322: <a href=stable.html>patch branch</a>.
323:
324: <p>
325: <ul>
1.393 sthen 326: <li><a href="errata50.html#002_libcrypto">April 23, 2012:
327: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 328: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.388 miod 329: </ul>
330:
331: <li>
1.387 miod 332: <a name="49"></a>
333:
334: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
335: These are the OpenBSD 4.9 advisories -- all these problems are solved
336: in <a href=anoncvs.html>OpenBSD current</a> and the
337: <a href=stable.html>patch branch</a>.
338:
339: <p>
340: <ul>
341: None yet!
342: </ul>
343:
344: <li>
345: <a name="48"></a>
346:
347: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
348: These are the OpenBSD 4.8 advisories -- all these problems are solved
349: in <a href=anoncvs.html>OpenBSD current</a> and the
350: <a href=stable.html>patch branch</a>.
351:
352: <p>
353: <ul>
354: <li><a href="errata48.html#009_pf">February 16, 2011:
355: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
356: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
357: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
358: prefixes "10.1.1.1/30") are not affected.</a>
359: <li><a href="errata48.html#008_openssl">February 11, 2011:
360: An incorrectly formatted ClientHello handshake message could cause
361: OpenSSL to parse past the end of the message. An attacker could use
362: this flaw to trigger an invalid memory access, causing a crash of an
363: application linked to OpenSSL. As well, certain applications may expose
364: the contents of parsed OCSP extensions, specifically the OCSP nonce
365: extension.
366: <br>
367: Applications are only affected if they act as a server and call
368: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
369: that nothing in the base OS uses this. Apache httpd started using this
370: in v2.3.3; this is newer than the version in ports.</a>
371: <li><a href="errata48.html#005_pf">December 17, 2010:
372: Insufficent initialization of the pf rule structure in the ioctl
373: handler may allow userland to modify kernel memory. By default root
374: privileges are needed to add or modify pf rules.</a>
375: </ul>
376:
377: <li>
1.385 jasper 378: <a name="47"></a>
379:
380: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
381: These are the OpenBSD 4.7 advisories -- all these problems are solved
382: in <a href=anoncvs.html>OpenBSD current</a> and the
383: <a href=stable.html>patch branch</a>.
384:
385: <p>
386: <ul>
1.387 miod 387: <li><a href="errata47.html#013_pf">February 16, 2011:
388: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
389: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
390: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
391: prefixes "10.1.1.1/30") are not affected.</a>
392: <li><a href="errata47.html#012_openssl">February 11, 2011:
393: An incorrectly formatted ClientHello handshake message could cause
394: OpenSSL to parse past the end of the message. An attacker could use
395: this flaw to trigger an invalid memory access, causing a crash of an
396: application linked to OpenSSL. As well, certain applications may expose
397: the contents of parsed OCSP extensions, specifically the OCSP nonce
398: extension.
399: <br>
400: Applications are only affected if they act as a server and call
401: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
402: that nothing in the base OS uses this. Apache httpd started using this
403: in v2.3.3; this is newer than the version in ports.</a>
404: <li><a href="errata47.html#009_pf">December 17, 2010:
405: Insufficent initialization of the pf rule structure in the ioctl
406: handler may allow userland to modify kernel memory. By default root
407: privileges are needed to add or modify pf rules.</a>
408: <li><a href="errata47.html#004_pfsync">April 23, 2010:
409: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 410: <li><a href="errata47.html#003_openssl">April 14, 2010:
411: In TLS connections, certain incorrectly formatted records can
412: cause an OpenSSL client or server to crash due to a read
1.392 tobias 413: attempt at NULL.</a>
1.385 jasper 414: </ul>
415:
416: <li>
1.378 jasper 417: <a name="46"></a>
418:
419: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
420: These are the OpenBSD 4.6 advisories -- all these problems are solved
421: in <a href=anoncvs.html>OpenBSD current</a> and the
422: <a href=stable.html>patch branch</a>.
423:
424: <p>
425: <ul>
1.385 jasper 426: <li><a href="errata46.html#010_openssl">April 14, 2010:
427: In TLS connections, certain incorrectly formatted records can
428: cause an OpenSSL client or server to crash due to a read
1.392 tobias 429: attempt at NULL.</a>
1.384 jasper 430: <li><a href="errata46.html#006_openssl">March 12, 2010:
431: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 432: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 433: <li><a href="errata46.html#004_openssl">November 26, 2009:
434: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 435: related to renegotiation.</a>
1.378 jasper 436: </ul>
1.382 tobias 437:
438: <li>
1.373 djm 439: <a name="45"></a>
440:
441: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
442: These are the OpenBSD 4.5 advisories -- all these problems are solved
443: in <a href=anoncvs.html>OpenBSD current</a> and the
444: <a href=stable.html>patch branch</a>.
445:
446: <p>
447: <ul>
1.385 jasper 448: <li><a href="errata45.html#016_openssl">April 14, 2010:
449: In TLS connections, certain incorrectly formatted records can
450: cause an OpenSSL client or server to crash due to a read
1.392 tobias 451: attempt at NULL.</a>
1.385 jasper 452: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 453: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 454: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 455: <li><a href="errata45.html#010_openssl">November 26, 2009:
456: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 457: related to renegotiation.</a>
1.373 djm 458: </ul>
459:
460: <li>
1.365 deraadt 461: <a name="44"></a>
462:
463: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
464: These are the OpenBSD 4.4 advisories -- all these problems are solved
465: in <a href=anoncvs.html>OpenBSD current</a> and the
466: <a href=stable.html>patch branch</a>.
467:
468: <p>
469: <ul>
1.372 millert 470: <li><a href="errata44.html#011_sudo">February 22, 2009:
471: sudo(8) may allow a user listed in sudoers to run a command
472: as a different user than their access rule specifies when a Unix
473: group is used in the RunAs portion of the rule.</a>
1.370 djm 474: <li><a href="errata44.html#008_bind">January 15, 2009:
475: named(8) suffered from a similar logic error that may allow
476: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 477: <li><a href="errata44.html#007_openssl">January 9, 2009:
478: OpenSSL suffered from some logic errors that allowed bypass
479: of DSA/ECDSA certificate validation.</a>
1.367 brad 480: <li><a href="errata44.html#001_ndp">November 2, 2008:
481: The Neighbor Discovery Protocol (ndp) did not correctly verify
482: neighbor solicitation requests maybe allowing a nearby attacker
483: to intercept traffic.</a>
1.365 deraadt 484: </ul>
485:
486: <li>
1.357 brad 487: <a name="43"></a>
488:
489: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
490: These are the OpenBSD 4.3 advisories -- all these problems are solved
491: in <a href=anoncvs.html>OpenBSD current</a> and the
492: <a href=stable.html>patch branch</a>.
493:
494: <p>
495: <ul>
1.372 millert 496: <li><a href="errata43.html#011_sudo">February 22, 2009:
497: sudo(8) may allow a user listed in sudoers to run a command
498: as a different user than their access rule specifies when a Unix
499: group is used in the RunAs portion of the rule.</a>
1.370 djm 500: <li><a href="errata43.html#008_bind">January 15, 2009:
501: named(8) suffered from a similar logic error that may allow
502: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 503: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 504: OpenSSL suffered from some logic errors that allowed bypass
505: of DSA/ECDSA certificate validation.</a>
1.382 tobias 506: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 507: The Neighbor Discovery Protocol (ndp) did not correctly verify
508: neighbor solicitation requests maybe allowing a nearby attacker
509: to intercept traffic.</a>
1.362 brad 510: <li><a href="errata43.html#004_bind">July 23, 2008:
511: A vulnerability has been found with BIND.</a>
1.361 brad 512: <li><a href="errata43.html#003_xorg">July 15, 2008:
513: Multiple vulnerabilities in X.Org.</a>
1.359 brad 514: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 515: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 516: <li><a href="errata43.html#001_openssh">March 30, 2008:
517: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 518: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 519: </ul>
520:
521: <li>
1.348 merdely 522: <a name="42"></a>
523: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
524: These are the OpenBSD 4.2 advisories -- all these problems are solved
525: in <a href=anoncvs.html>OpenBSD current</a> and the
526: <a href=stable.html>patch branch</a>.
527:
528: <p>
529: <ul>
1.364 tobias 530: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 531: The Neighbor Discovery Protocol (ndp) did not correctly verify
532: neighbor solicitation requests maybe allowing a nearby attacker
533: to intercept traffic.</a>
1.362 brad 534: <li><a href="errata42.html#013_bind">July 23, 2008:
535: A vulnerability has been found with BIND.</a>
1.361 brad 536: <li><a href="errata42.html#012_xorg2">July 15, 2008:
537: Multiple vulnerabilities in X.Org.</a>
1.359 brad 538: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 539: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 540: <li><a href="errata42.html#010_openssh">March 30, 2008:
541: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 542: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 543: <li><a href="errata42.html#009_ppp">March 7, 2008:
544: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 545: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
546: Multiple vulnerabilities in X.Org.</a>
1.351 okan 547: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
548: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 549: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 550: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 551: </ul>
552:
553: <li>
1.346 matthieu 554: <a name="41"></a>
555:
556: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
557: These are the OpenBSD 4.1 advisories -- all these problems are solved
558: in <a href=anoncvs.html>OpenBSD current</a> and the
559: <a href=stable.html>patch branch</a>.
560:
561: <p>
562: <ul>
1.359 brad 563: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 564: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 565: <li><a href="errata41.html#015_openssh">March 30, 2008:
566: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 567: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 568: <li><a href="errata41.html#014_ppp">March 7, 2008:
569: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 570: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
571: Multiple vulnerabilities in X.Org.</a>
572: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
573: The SSL_get_shared_ciphers() function in OpenSSL contains
574: an off-by-one overflow.</a>
1.350 deraadt 575: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 576: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 577: <li><a href="errata41.html#009_file">Jul 9, 2007:
578: Fix possible heap overflow in file(1).</a>
1.346 matthieu 579: <li><a href="errata41.html#005_route6">Apr 27, 2007:
580: IPv6 type 0 route headers can be used to mount a DoS attack
581: against hosts and networks.</a>
582: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
583: Multiple vulnerabilities in X.Org.</a>
584: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
585: Incorrect mbuf handling for ICMP6 packets.</a>
586: </ul>
587:
588: <li>
1.334 brad 589: <a name="40"></a>
590: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
591: These are the OpenBSD 4.0 advisories -- all these problems are solved
592: in <a href=anoncvs.html>OpenBSD current</a> and the
593: <a href=stable.html>patch branch</a>.
594:
595: <p>
596: <ul>
1.382 tobias 597: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
598: The SSL_get_shared_ciphers() function in OpenSSL contains an
599: off-by-one overflow.</a>
1.350 deraadt 600: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 601: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 602: <li><a href="errata40.html#015_file">Jul 9, 2007:
603: Fix possible heap overflow in file(1).</a>
1.343 deraadt 604: <li><a href="errata40.html#012_route6">Apr 23, 2007:
605: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 606: against hosts and networks.</a>
1.342 mbalmer 607: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
608: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 609: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
610: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 611: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 612: Insufficient validation in vga(4) may allow an attacker to gain
613: root privileges on some i386 systems.</a>
1.339 deraadt 614: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 615: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 616: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 617: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
618: found by Chris Evans.</a>
1.339 deraadt 619: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 620: Several problems have been found in OpenSSL.</a>
1.339 deraadt 621: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 622: httpd(8) does not sanitize the Expect header from an HTTP request
623: when it is reflected back in an error message, which might allow
624: cross-site scripting (XSS) style attacks.</a>
625: </ul>
626:
627: <li>
1.321 brad 628: <a name="39"></a>
629:
630: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
631: These are the OpenBSD 3.9 advisories -- all these problems are solved
632: in <a href=anoncvs.html>OpenBSD current</a> and the
633: <a href=stable.html>patch branch</a>.
634:
635: <p>
636: <ul>
1.343 deraadt 637: <li><a href="errata39.html#022_route6">Apr 23, 2007:
638: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 639: against hosts and networks.</a>
1.342 mbalmer 640: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
641: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 642: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
643: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 644: <li><a href="errata39.html#agp">Jan 3, 2007:
645: Insufficient validation in vga(4) may allow an attacker to gain
646: root privileges on some i386 systems.</a>
1.336 brad 647: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 648: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 649: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 650: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 651: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 652: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 653: found by Chris Evans.</a>
1.333 deraadt 654: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 655: Several problems have been found in OpenSSL.</a>
1.333 deraadt 656: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 657: httpd(8) does not sanitize the Expect header from an HTTP request
658: when it is reflected back in an error message, which might allow
659: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 660: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 661: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
662: possible for an attacker to construct an invalid signature which
663: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 664: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 665: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 666: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 667: Due to the failure to correctly validate LCP configuration option
668: lengths, it is possible for an attacker to send LCP packets via an
669: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 670: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 671: A problem in isakmpd(8) caused IPsec to run partly without replay
672: protection.</a>
1.333 deraadt 673: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 674: It is possible to cause the kernel to panic when more than the default
675: number of sempahores have been allocated.</a>
1.333 deraadt 676: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 677: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
678: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
679: option.</a>
1.333 deraadt 680: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 681: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 682: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 683: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
684: overflow.</a>
1.333 deraadt 685: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 686: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 687: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 688: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 689: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 690: A race condition has been reported to exist in the handling by sendmail
691: of asynchronous signals.</a>
692: </ul>
693:
694: <li>
1.318 deraadt 695: <a name="38"></a>
696:
697: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
698: These are the OpenBSD 3.8 advisories -- all these problems are solved
699: in <a href=anoncvs.html>OpenBSD current</a> and the
700: <a href=stable.html>patch branch</a>.
701:
702: <p>
703: <ul>
1.332 brad 704: <li><a href="errata38.html#ssh2">Oct 12, 2006:
705: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 706: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 707: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 708: found by Chris Evans.</a>
709: <li><a href="errata38.html#openssl2">Oct 7, 2006:
710: Several problems have been found in OpenSSL.</a>
711: <li><a href="errata38.html#httpd2">Oct 7, 2006:
712: httpd(8) does not sanitize the Expect header from an HTTP request
713: when it is reflected back in an error message, which might allow
714: cross-site scripting (XSS) style attacks.</a>
1.329 brad 715: <li><a href="errata38.html#openssl">Sep 8, 2006:
716: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
717: possible for an attacker to construct an invalid signature which
718: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 719: <li><a href="errata38.html#bind">Sep 8, 2006:
720: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 721: <li><a href="errata38.html#sppp">Sep 2, 2006:
722: Due to the failure to correctly validate LCP configuration option
723: lengths, it is possible for an attacker to send LCP packets via an
724: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 725: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
726: A problem in isakmpd(8) caused IPsec to run partly without replay
727: protection.</a>
728: <li><a href="errata38.html#sem">Aug 25, 2006:
729: It is possible to cause the kernel to panic when more than the default
730: number of sempahores have been allocated.</a>
731: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
732: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
733: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
734: option.</a>
735: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
736: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 737: <li><a href="errata38.html#httpd">Jul 30, 2006:
738: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
739: overflow.</a>
1.324 brad 740: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
741: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 742: <li><a href="errata38.html#xorg">May 2, 2006:
743: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 744: <li><a href="errata38.html#sendmail">Mar 25, 2006:
745: A race condition has been reported to exist in the handling by sendmail
746: of asynchronous signals.</a>
747: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 748: Josh Bressers has reported a weakness in OpenSSH caused due to the
749: insecure use of the system(3) function in scp(1) when performing copy
750: operations using filenames that are supplied by the user from the
751: command line.</a>
1.321 brad 752: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 753: Do not allow users to trick suid programs into re-opening files via
754: /dev/fd.</a>
1.321 brad 755: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 756: A buffer overflow has been found in the Perl interpreter with the
757: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 758: </ul>
759:
760: <li>
1.312 david 761: <a name="37"></a>
762:
763: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
764: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 765: in <a href="anoncvs.html">OpenBSD current</a>. The
766: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
767: you should update your machine.
1.312 david 768:
769: <p>
770: <ul>
1.322 brad 771: <li><a href="errata37.html#xorg">May 2, 2006:
772: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 773: <li><a href="errata37.html#sendmail">Mar 25, 2006:
774: A race condition has been reported to exist in the handling by sendmail
775: of asynchronous signals.</a>
1.320 brad 776: <li><a href="errata37.html#ssh">Feb 12, 2006:
777: Josh Bressers has reported a weakness in OpenSSH caused due to the
778: insecure use of the system(3) function in scp(1) when performing copy
779: operations using filenames that are supplied by the user from the
780: command line.</a>
1.319 brad 781: <li><a href="errata37.html#fd">Jan 5, 2006:
782: Do not allow users to trick suid programs into re-opening files via
783: /dev/fd.</a>
784: <li><a href="errata37.html#perl">Jan 5, 2006:
785: A buffer overflow has been found in the Perl interpreter with the
786: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 787: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 788: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 789: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 790: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 791: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 792: Fix a race condition in sudo(8) that could allow a user
1.315 millert 793: to run arbitrary commands.</a>
1.318 deraadt 794: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 795: Fix a buffer overflow, memory leaks, and NULL pointer
796: dereference in cvs(1).</a>
1.312 david 797: </ul>
798:
799: <li>
1.301 miod 800: <a name="36"></a>
801:
802: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
803: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 804: in <a href="anoncvs.html">OpenBSD current</a>. The
805: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
806: you should update your machine.
1.301 miod 807:
808: <p>
1.302 markus 809: <ul>
1.317 millert 810: <li><a href="errata36.html#libz2">Jul 21, 2005:
811: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 812: <li><a href="errata36.html#libz">Jul 6, 2005:
813: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 814: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 815: Fix a race condition in sudo(8) that could allow a user
1.315 millert 816: to run arbitrary commands.</a>
1.311 deraadt 817: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 818: Fix a buffer overflow, memory leaks, and NULL pointer
819: dereference in cvs(1).</a>
1.311 deraadt 820: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 821: Due to buffer overflows in telnet(1), a malicious
822: server or man-in-the-middle attack could allow
823: execution of arbitrary code with the privileges of
824: the user invoking telnet(1).</a>
1.311 deraadt 825: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 826: More stringent checking should be done in the copy(9)
827: functions to prevent their misuse.</a>
1.311 deraadt 828: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 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#httpd">Jan 12, 2005:
1.304 brad 832: httpd(8)'s mod_include module fails to properly validate
833: the length of user supplied tag strings prior to copying
1.305 brad 834: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 835: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 836: On systems running isakmpd(8) it is possible for a local
837: user to cause kernel memory corruption and system panic by
1.303 markus 838: setting ipsec(4) credentials on a socket.</a>
1.302 markus 839: </ul>
1.301 miod 840:
841: <li>
1.288 matthieu 842: <a name="35"></a>
1.279 deraadt 843:
1.294 david 844: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 845: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 846: in <a href="anoncvs.html">OpenBSD current</a>. The
847: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
848: you should update your machine.
1.279 deraadt 849:
850: <p>
851: <ul>
1.310 brad 852: <li><a href="errata35.html#cvs4">Apr 28, 2005:
853: Fix a buffer overflow, memory leaks, and NULL pointer
854: dereference in cvs(1).</a>
1.309 brad 855: <li><a href="errata35.html#telnet">Mar 30, 2005:
856: Due to buffer overflows in telnet(1), a malicious
857: server or man-in-the-middle attack could allow
858: execution of arbitrary code with the privileges of
859: the user invoking telnet(1).</a>
1.308 brad 860: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 861: More stringent checking should be done in the copy(9)
862: functions to prevent their misuse.</a>
1.306 brad 863: <li><a href="errata35.html#locore">Feb 28, 2005:
864: More stringent checking should be done in the copy(9)
865: functions to prevent their misuse.</a>
1.304 brad 866: <li><a href="errata35.html#httpd3">Jan 12, 2005:
867: httpd(8)'s mod_include module fails to properly validate
868: the length of user supplied tag strings prior to copying
1.305 brad 869: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 870: <li><a href="errata35.html#pfkey">Dec 14, 2004:
871: On systems running isakmpd(8) it is possible for a local
872: user to cause kernel memory corruption and system panic by
1.303 markus 873: setting ipsec(4) credentials on a socket.</a>
1.301 miod 874: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 875: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 876: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 877: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 878: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 879: httpd(8)'s mod_rewrite module can be made to write one zero byte in
880: an arbitrary memory position outside of a char array, causing a DoS
881: or possibly buffer overflows.</a>
1.301 miod 882: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 883: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 884: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 885: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 886: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 887: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 888: Multiple remote vulnerabilities have been found in the cvs(1)
889: server which can be used by CVS clients to crash or execute
1.293 brad 890: arbitrary code on the server.</a>
1.301 miod 891: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 892: kdc(8) performs inadequate checking of request fields, leading
893: to the possibility of principal impersonation from other
894: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 895: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 896: xdm(1) ignores the requestPort resource and creates a
1.293 brad 897: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 898: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 899: A buffer overflow in the cvs(1) server has been found,
900: which can be used by CVS clients to execute arbitrary code on
1.293 brad 901: the server.</a>
1.301 miod 902: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 903: Integer overflow problems were found in procfs, allowing
1.293 brad 904: reading of arbitrary kernel memory.</a>
1.301 miod 905: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 906: Pathname validation problems have been found in cvs(1),
907: allowing clients and servers access to files outside the
1.293 brad 908: repository or local CVS tree.</a>
1.279 deraadt 909: </ul>
910:
911: <p>
912: <li>
1.288 matthieu 913: <a name="34"></a>
1.261 david 914:
1.294 david 915: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 916: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 917: in <a href="anoncvs.html">OpenBSD current</a>. The
918: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
919: you should update your machine.
1.261 david 920: <p>
921: <ul>
1.302 markus 922: <li><a href="errata34.html#pfkey">Dec 14, 2004:
923: On systems running isakmpd(8) it is possible for a local
924: user to cause kernel memory corruption and system panic by
1.303 markus 925: setting ipsec(4) credentials on a socket.</a>
1.298 brad 926: <li><a href="errata34.html#xpm">Sep 16, 2004:
927: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 928: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
929: httpd(8)'s mod_rewrite module can be made to write one zero byte in
930: an arbitrary memory position outside of a char array, causing a DoS
931: or possibly buffer overflows.</a>
1.294 david 932: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 933: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 934: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 935: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 936: an attacker can delete IPsec tunnels at will.</a>
1.294 david 937: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 938: Multiple remote vulnerabilities have been found in the cvs(1)
939: server which can be used by CVS clients to crash or execute
1.293 brad 940: arbitrary code on the server.</a>
1.294 david 941: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 942: kdc(8) performs inadequate checking of request fields, leading
943: to the possibility of principal impersonation from other
944: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 945: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 946: A buffer overflow in the cvs(1) server has been found,
947: which can be used by CVS clients to execute arbitrary code on
948: the server.</a>
1.294 david 949: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 950: Integer overflow problems were found in procfs, allowing
951: reading of arbitrary kernel memory.</a>
1.294 david 952: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 953: Pathname validation problems have been found in cvs(1),
954: allowing clients and servers access to files outside the
955: repository or local CVS tree.</a>
1.294 david 956: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 957: A missing check for a NULL-pointer dereference may allow a
1.281 otto 958: remote attacker to crash applications using OpenSSL.</a>
1.294 david 959: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 960: Defects in the payload validation and processing functions of
961: isakmpd have been discovered. An attacker could send malformed
962: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 963: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 964: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
965: access module, using IP addresses without a netmask on big endian
966: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 967: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 968: An IPv6 MTU handling problem exists that could be used by an
969: attacker to cause a denial of service attack.</a>
1.294 david 970: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 971: A reference counting bug in shmat(2) could be used to write to
972: kernel memory under certain circumstances.</a>
1.294 david 973: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 974: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 975: by Thomas Walpuski.</a>
1.294 david 976: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 977: It may be possible for a local user to overrun the stack in
978: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 979: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 980: The use of certain ASN.1 encodings or malformed public keys may
981: allow an attacker to mount a denial of service attack against
982: applications linked with ssl(3).</a>
1.261 david 983: </ul>
984:
985: <li>
1.288 matthieu 986: <a name="33"></a>
1.246 deraadt 987:
1.294 david 988: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 989: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 990: in <a href="anoncvs.html">OpenBSD current</a>. The
991: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 992: you should update your machine.
1.246 deraadt 993: <p>
994: <ul>
1.294 david 995: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 996: Pathname validation problems have been found in cvs(1),
997: allowing clients and servers access to files outside the
998: repository or local CVS tree.</a>
1.294 david 999: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 1000: A missing check for a NULL-pointer dereference may allow a
1.281 otto 1001: remote attacker to crash applications using OpenSSL.</a>
1.294 david 1002: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 1003: Defects in the payload validation and processing functions of
1004: isakmpd have been discovered. An attacker could send malformed
1005: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 1006: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 1007: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
1008: access module, using IP addresses without a netmask on big endian
1009: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 1010: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 1011: An IPv6 MTU handling problem exists that could be used by an
1012: attacker to cause a denial of service attack.</a>
1.294 david 1013: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 1014: A reference counting bug in shmat(2) could be used to write to
1015: kernel memory under certain circumstances.</a>
1.294 david 1016: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 1017: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 1018: by Thomas Walpuski.</a>
1.294 david 1019: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 1020: It may be possible for a local user to execute arbitrary code
1021: resulting in escalation of privileges due to a stack overrun
1022: in compat_ibcs2(8).</a>
1.294 david 1023: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 1024: The use of certain ASN.1 encodings or malformed public keys may
1025: allow an attacker to mount a denial of service attack against
1026: applications linked with ssl(3).</a>
1.294 david 1027: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 1028: Access of freed memory in pf(4) could be used to
1.260 margarid 1029: remotely panic a machine using scrub rules.</a>
1.294 david 1030: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 1031: A buffer overflow in the address parsing in
1032: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1033: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 1034: OpenSSH versions prior to 3.7 contains a buffer management error
1035: that is potentially exploitable.</a>
1.294 david 1036: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 1037: Root may be able to reduce the security level by taking advantage of
1038: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 1039: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 1040: An improper bounds check in the kernel may allow a local user
1041: to panic the kernel.</a>
1.294 david 1042: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 1043: An off-by-one error exists in the C library function realpath(3)
1044: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 1045: </ul>
1046:
1.265 miod 1047:
1.247 david 1048: <p>
1.246 deraadt 1049: <li>
1.288 matthieu 1050: <a name="32"></a>
1.224 deraadt 1051:
1.294 david 1052: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 1053: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 1054: in <a href="anoncvs.html">OpenBSD current</a>. The
1055: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 1056: you should update your machine.
1.224 deraadt 1057: <p>
1058: <ul>
1.294 david 1059: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 1060: The use of certain ASN.1 encodings or malformed public keys may
1061: allow an attacker to mount a denial of service attack against
1062: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 1063: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 1064: Access of freed memory in pf(4) could be used to
1.260 margarid 1065: remotely panic a machine using scrub rules.</a>
1.294 david 1066: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 1067: A buffer overflow in the address parsing in
1068: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1069: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 1070: OpenSSH versions prior to 3.7 contains a buffer management error
1071: that is potentially exploitable.</a>
1.294 david 1072: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 1073: Fix for a potential security issue in
1074: sendmail(8) with respect to DNS maps.</a>
1.294 david 1075: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1076: An off-by-one error exists in the C library function realpath(3)
1077: may allow an attacker to gain escalated privileges.</a>
1.294 david 1078: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1079: A buffer overflow in the address parsing in
1080: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1081: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1082: A cryptographic weaknesses in the Kerberos v4 protocol can be
1083: exploited on Kerberos v5 as well.</a>
1.294 david 1084: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1085: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1086: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1087: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1088: Various SSL and TLS operations in OpenSSL are vulnerable to
1089: timing attacks.</a>
1.294 david 1090: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1091: A buffer overflow in lprm(1) may allow an attacker to elevate
1.392 tobias 1092: privileges to user daemon.</a>
1.294 david 1093: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1094: A buffer overflow in the envelope comments processing in
1095: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1096: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1097: httpd(8) leaks file inode numbers via ETag header as well as
1098: child PIDs in multipart MIME boundary generation. This could
1099: lead, for example, to NFS exploitation because it uses inode
1100: numbers as part of the file handle.</a>
1.294 david 1101: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1102: In ssl(8) an information leak can occur via timing by performing
1103: a MAC computation even if incorrect block cipher padding has
1104: been found, this is a countermeasure. Also, check for negative
1105: sizes, in allocation routines.</a>
1.294 david 1106: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1107: A double free exists in cvs(1) that could lead to privilege
1108: escalation for cvs configurations where the cvs command is
1.233 margarid 1109: run as a privileged user.</a>
1.294 david 1110: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1111: A buffer overflow exists in named(8) that could lead to a
1112: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1113: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1114: A logic error in the pool kernel memory allocator could cause
1115: memory corruption in low-memory situations, causing the system
1116: to crash.</a>
1.294 david 1117: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1118: An attacker can bypass smrsh(8)'s restrictions and execute
1119: arbitrary commands with the privileges of his own account.</a>
1.294 david 1120: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1121: Network bridges running pf with scrubbing enabled could cause
1122: mbuf corruption, causing the system to crash.</a>
1.294 david 1123: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1124: A buffer overflow can occur in the kadmind(8) daemon, leading
1125: to possible remote crash or exploit.</a>
1.224 deraadt 1126: </ul>
1127:
1.227 miod 1128: <p>
1129: <li>
1.288 matthieu 1130: <a name="31"></a>
1.203 deraadt 1131:
1.294 david 1132: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1133: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1134: in <a href="anoncvs.html">OpenBSD current</a>. The
1135: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1136: you should update your machine.
1.203 deraadt 1137:
1138: <p>
1139: <ul>
1.294 david 1140: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1141: A buffer overflow in the address parsing in
1142: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1143: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1144: A cryptographic weaknesses in the Kerberos v4 protocol can be
1145: exploited on Kerberos v5 as well.</a>
1.294 david 1146: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1147: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1148: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1149: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1150: Various SSL and TLS operations in OpenSSL are vulnerable to
1151: timing attacks.</a>
1.294 david 1152: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1153: A buffer overflow in lprm(1) may allow an attacker to gain
1154: root privileges.</a>
1.294 david 1155: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1156: A buffer overflow in the envelope comments processing in
1157: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1158: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1159: In ssl(8) an information leak can occur via timing by performing
1160: a MAC computation even if incorrect block cipher padding has
1161: been found, this is a countermeasure. Also, check for negative
1162: sizes, in allocation routines.</a>
1.294 david 1163: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1164: A double free exists in cvs(1) that could lead to privilege
1165: escalation for cvs configurations where the cvs command is
1.392 tobias 1166: run as a privileged user.</a>
1.294 david 1167: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1168: A buffer overflow exists in named(8) that could lead to a
1169: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1170: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1171: Incorrect argument checking in the getitimer(2) system call
1172: may allow an attacker to crash the system.</a>
1.294 david 1173: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1174: An attacker can bypass smrsh(8)'s restrictions and execute
1175: arbitrary commands with the privileges of his own account.</a>
1.294 david 1176: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1177: A buffer overflow can occur in the kadmind(8) daemon, leading
1178: to possible remote crash or exploit.</a>
1.294 david 1179: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1180: Incorrect argument checking in the setitimer(2) system call
1181: may allow an attacker to write to kernel memory.</a>
1.294 david 1182: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1183: An insufficient boundary check in the select system call
1.220 miod 1184: allows an attacker to overwrite kernel memory and execute arbitrary code
1185: in kernel context.</a>
1.294 david 1186: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1187: Several remote buffer overflows can occur in the SSL2 server and SSL3
1188: client of the ssl(8) library, as in the ASN.1 parser code in the
1189: crypto(3) library, all of them being potentially remotely
1190: exploitable.</a>
1.294 david 1191: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1192: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1193: possible remote crash.</a>
1.294 david 1194: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1195: A race condition exists in the pppd(8) daemon which may cause it to
1196: alter the file permissions of an arbitrary file.</a>
1.294 david 1197: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1198: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1199: crash.</a>
1.294 david 1200: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1201: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1202: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1203: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1204: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1205: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1206: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1207: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1208: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1209: input validation error that can result in an integer overflow and
1210: privilege escalation.</a>
1.294 david 1211: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1212: A buffer overflow can occur during the interpretation of chunked
1213: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1214: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1215: Under certain conditions, on systems using YP with netgroups
1216: in the password database, it is possible that sshd(8) does
1217: ACL checks for the requested user name but uses the password
1218: database entry of a different user for authentication. This
1219: means that denied users might authenticate successfully
1220: while permitted users could be locked out.</a>
1.294 david 1221: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1222: A race condition exists that could defeat the kernel's
1223: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1224: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1225: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1226: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1227: A local user can gain super-user privileges due to a buffer
1228: overflow in sshd(8) if AFS has been configured on the system
1229: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1230: in the sshd_config file.</a>
1.203 deraadt 1231: </ul>
1232:
1.235 miod 1233: <p>
1.203 deraadt 1234: <li>
1.288 matthieu 1235: <a name="30"></a>
1.187 deraadt 1236:
1.294 david 1237: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1238: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1239: in <a href="anoncvs.html">OpenBSD current</a>. The
1240: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1241: you should update your machine.
1.187 deraadt 1242:
1243: <p>
1244: <ul>
1.294 david 1245: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1246: A buffer overflow exists in named(8) that could lead to a
1247: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1248: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1249: Incorrect argument checking in the getitimer(2) system call
1250: may allow an attacker to crash the system.</a>
1.294 david 1251: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1252: An attacker can bypass smrsh(8)'s restrictions and execute
1253: arbitrary commands with the privileges of his own account.</a>
1.294 david 1254: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1255: A buffer overflow can occur in the kadmind(8) daemon, leading
1256: to possible remote crash or exploit.</a>
1.294 david 1257: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1258: Incorrect argument checking in the setitimer(2) system call
1259: may allow an attacker to write to kernel memory.</a>
1.294 david 1260: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1261: An insufficient boundary check in the select and poll system calls
1262: allows an attacker to overwrite kernel memory and execute arbitrary code
1263: in kernel context.</a>
1.294 david 1264: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1265: Several remote buffer overflows can occur in the SSL2 server and SSL3
1266: client of the ssl(8) library, as in the ASN.1 parser code in the
1267: crypto(3) library, all of them being potentially remotely
1268: exploitable.</a>
1.294 david 1269: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1270: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1271: possible remote crash.</a>
1.294 david 1272: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1273: A race condition exists in the pppd(8) daemon which may cause it to
1274: alter the file permissions of an arbitrary file.</a>
1.294 david 1275: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1276: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1277: crash.</a>
1.294 david 1278: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1279: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1280: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1281: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1282: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1283: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1284: input validation error that can result in an integer overflow and
1285: privilege escalation.</a>
1.294 david 1286: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1287: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1288: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1289: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1290: A buffer overflow can occur during the interpretation of chunked
1291: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1292: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1293: A race condition exists that could defeat the kernel's
1294: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1295: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1296: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1297: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1298: A local user can gain super-user privileges due to a buffer
1299: overflow in sshd(8) if AFS has been configured on the system
1300: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1301: in the sshd_config file.</a>
1.294 david 1302: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1303: The mail(1) was interpreting tilde escapes even when invoked
1304: in non-interactive mode. As mail(1) is called as root from cron,
1305: this can lead to a local root compromise.</a>
1.294 david 1306: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1307: Under certain conditions, on systems using YP with netgroups in
1308: the password database, it is possible for the rexecd(8) and rshd(8)
1309: daemons to execute a shell from a password database entry for a
1310: different user. Similarly, atrun(8) may change to the wrong
1311: home directory when running jobs.</a>
1.294 david 1312: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1313: A potential double free() exists in the zlib library;
1314: this is not exploitable on OpenBSD.
1315: The kernel also contains a copy of zlib; it is not
1316: currently known if the kernel zlib is exploitable.</a>
1.294 david 1317: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1318: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1319: may allow a local user to gain super-user privileges.</a>
1.294 david 1320: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1321: A race condition between the ptrace(2) and execve(2) system calls
1322: allows an attacker to modify the memory contents of suid/sgid
1323: processes which could lead to compromise of the super-user account.</a>
1.294 david 1324: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1325: There is a security hole in sudo(8) that can be exploited
1326: when the Postfix sendmail replacement is installed that may
1327: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1328: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1329: An attacker can trick a machine running the lpd daemon into
1330: creating new files in the root directory from a machine with
1331: remote line printer access.</a>
1.294 david 1332: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1333: The vi.recover script can be abused in such a way as
1334: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1335: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1336: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1337: resulting in a crash.</a>
1.294 david 1338: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1339: A security hole that may allow an attacker to partially authenticate
1340: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1341: </ul>
1342:
1343: <p>
1344: <li>
1.288 matthieu 1345: <a name="29"></a>
1.173 deraadt 1346:
1.294 david 1347: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1348: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1349: in <a href="anoncvs.html">OpenBSD current</a>. The
1350: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1351: you should update your machine.
1352:
1.173 deraadt 1353:
1354: <p>
1355: <ul>
1.294 david 1356: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1357: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1358: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1359: A race condition exists that could defeat the kernel's
1360: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1361: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1362: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1363: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1364: A local user can gain super-user privileges due to a buffer
1365: overflow in sshd(8) if AFS has been configured on the system
1366: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1367: in the sshd_config file.</a>
1.294 david 1368: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1369: The mail(1) was interpreting tilde escapes even when invoked
1370: in non-interactive mode. As mail(1) is called as root from cron,
1371: this can lead to a local root compromise.</a>
1.294 david 1372: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1373: A potential double free() exists in the zlib library;
1374: this is not exploitable on OpenBSD.
1375: The kernel also contains a copy of zlib; it is not
1376: currently known if the kernel zlib is exploitable.</a>
1.294 david 1377: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1378: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1379: may allow a local user to gain super-user privileges.</a>
1.294 david 1380: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1381: A race condition between the ptrace(2) and execve(2) system calls
1382: allows an attacker to modify the memory contents of suid/sgid
1383: processes which could lead to compromise of the super-user account.</a>
1.294 david 1384: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1385: There is a security hole in sudo(8) that can be exploited
1386: when the Postfix sendmail replacement is installed that may
1387: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1388: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1389: An attacker can trick a machine running the lpd daemon into
1390: creating new files in the root directory from a machine with
1391: remote line printer access.</a>
1.294 david 1392: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1393: The vi.recover script can be abused in such a way as
1394: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1395: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1396: A security hole exists in uuxqt(8) that may allow an
1397: attacker to gain root privileges.</a>
1.294 david 1398: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1399: A security hole exists in lpd(8) that may allow an
1400: attacker to gain root privileges if lpd is running.</a>
1.294 david 1401: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1402: A security hole exists in sendmail(8) that may allow an
1403: attacker on the local host to gain root privileges.</a>
1.294 david 1404: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1405: A kernel buffer overflow in the NFS code can be used to execute
1406: arbitrary code by users with mount privileges (only root by
1.181 millert 1407: default).</a>
1.294 david 1408: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1409: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1410: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1411: sshd(8) allows users to delete arbitrary files named "cookies"
1412: if X11 forwarding is enabled. X11 forwarding is disabled
1413: by default.</a>
1.294 david 1414: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1415: Programs using the fts routines can be tricked into changing
1416: into the wrong directory.</a>
1.294 david 1417: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1418: Sendmail signal handlers contain unsafe code,
1419: leading to numerous race conditions.</a>
1.173 deraadt 1420: </ul>
1421:
1422: <p>
1423: <li>
1.288 matthieu 1424: <a name="28"></a>
1.152 deraadt 1425:
1.294 david 1426: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1427: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1428: in <a href="anoncvs.html">OpenBSD current</a>. The
1429: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1430: you should update your machine.
1431:
1.152 deraadt 1432:
1433: <p>
1434: <ul>
1.294 david 1435: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1436: A security hole exists in uuxqt(8) that may allow an
1437: attacker to gain root privileges.</a>
1.294 david 1438: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1439: A security hole exists in lpd(8) that may allow an
1440: attacker to gain root privileges if lpd is running.</a>
1.294 david 1441: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1442: A security hole exists in sendmail(8) that may allow an
1443: attacker on the local host to gain root privileges.</a>
1.294 david 1444: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1445: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1446: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1447: Programs using the fts routines can be tricked into changing
1448: into the wrong directory.</a>
1.294 david 1449: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1450: Sendmail signal handlers contain unsafe code,
1451: leading to numerous race conditions.</a>
1.294 david 1452: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1453: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1454: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1455: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1456: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1457: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1458: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1459: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1460: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1461: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1462: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1463: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1464: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1465: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1466: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1467: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1468: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1469: rnd(4) did not use all of its input when written to.</a>
1.294 david 1470: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1471: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1472: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1473: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1474: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1475: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1476: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1477: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1478: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1479: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1480: </ul>
1481:
1482: <p>
1483: <li>
1.288 matthieu 1484: <a name="27"></a>
1.124 deraadt 1485:
1.294 david 1486: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1487: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1488: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1489: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1490:
1491: <p>
1492: <ul>
1.294 david 1493: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1494: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1495: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1496: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1497: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1498: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1499: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1500: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1501: (patch included)</a>
1.294 david 1502: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1503: X11 libraries have 2 potential overflows in xtrans code.
1504: (patch included)</a>
1.294 david 1505: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1506: Apache mod_rewrite and mod_vhost_alias modules could expose files
1507: on the server in certain configurations if used.
1508: (patch included)</a>
1.294 david 1509: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1510: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1511: TERMPATH and TERMCAP environment variables as it should.
1512: (patch included)</a>
1.294 david 1513: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1514: There are printf-style format string bugs in several privileged
1515: programs. (patch included)</a>
1.294 david 1516: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1517: libcurses honored terminal descriptions in the $HOME/.terminfo
1518: directory as well as in the TERMCAP environment variable for
1519: setuid and setgid applications.
1.146 deraadt 1520: (patch included)</a>
1.294 david 1521: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1522: A format string vulnerability exists in talkd(8).
1523: (patch included)</a>
1.294 david 1524: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1525: A format string vulnerability exists in the pw_error() function of the
1526: libutil library, yielding localhost root through chpass(1).
1527: (patch included)</a>
1.294 david 1528: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1529: Bad ESP/AH packets could cause a crash under certain conditions.
1530: (patch included)</a>
1.294 david 1531: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1532: A format string vulnerability (localhost root) exists in xlock(1).
1533: (patch included)</a>
1.294 david 1534: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1535: Various bugs found in X11 libraries have various side effects, almost
1536: completely denial of service in OpenBSD.
1537: (patch included)</a>
1.294 david 1538: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1539: Just like pretty much all the other unix ftp daemons
1540: on the planet, ftpd had a remote root hole in it.
1541: Luckily, ftpd was not enabled by default.
1.137 deraadt 1542: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1543: (patch included)</a>
1.294 david 1544: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1545: Mopd, very rarely used, contained some buffer overflows.
1546: (patch included)</a>
1.294 david 1547: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1548: libedit would check for a <b>.editrc</b> file in the current
1549: directory. Not known to be a real security issue, but a patch
1550: is available anyways.
1551: (patch included)</a>
1.294 david 1552: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1553: A serious bug in dhclient(8) could allow strings from a
1554: malicious dhcp server to be executed in the shell as root.
1555: (patch included)</a>
1.294 david 1556: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1557: A serious bug in isakmpd(8) policy handling wherein
1558: policy verification could be completely bypassed in isakmpd.
1559: (patch included)</a>
1.294 david 1560: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1561: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1562: should not be used, and results in security problems on
1563: other operating systems.</a>
1.294 david 1564: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1565: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1566: (patch included)</a>
1.294 david 1567: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1568: Improper use of ipf <i>keep-state</i> rules can result
1569: in firewall rules being bypassed. (patch included)</a>
1570:
1.124 deraadt 1571: </ul>
1572:
1573: <p>
1574: <li>
1.288 matthieu 1575: <a name="26"></a>
1.119 deraadt 1576:
1.294 david 1577: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1578: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1579: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1580: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1581:
1582: <p>
1583: <ul>
1.294 david 1584: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1585: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1586: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1587: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1588: Improper use of ipf <i>keep-state</i> rules can result
1589: in firewall rules being bypassed. (patch included)</a>
1.294 david 1590: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1591: xlockmore has a bug which a localhost attacker can use to gain
1592: access to the encrypted root password hash (which is normally
1.245 miod 1593: encoded using blowfish</a> (see
1.294 david 1594: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1595: crypt(3)</a>)
1.245 miod 1596: (patch included).
1.294 david 1597: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1598: Systems running with procfs enabled and mounted are
1599: vulnerable to a very tricky exploit. procfs is not
1600: mounted by default.
1601: (patch included).</a>
1.294 david 1602: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1603: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1604: thus exposing the system to a race where the aliases file
1605: did not exist.
1.119 deraadt 1606: (patch included).</a>
1.294 david 1607: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1608: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1609: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1610: A buffer overflow in the RSAREF code included in the
1611: USA version of libssl, is possibly exploitable in
1612: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1613: (patch included).<br></a>
1614: <strong>Update:</strong> Turns out that this was not exploitable
1615: in any of the software included in OpenBSD 2.6.
1.294 david 1616: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1617: Any user could change interface media configurations, resulting in
1618: a localhost denial of service attack.
1.121 deraadt 1619: (patch included).</a>
1.119 deraadt 1620: </ul>
1621:
1622: <p>
1623: <li>
1.288 matthieu 1624: <a name="25"></a>
1.106 deraadt 1625:
1.294 david 1626: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1627: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1628: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1629: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1630:
1.96 deraadt 1631: <p>
1.104 deraadt 1632: <ul>
1.294 david 1633: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1634: In cron(8), make sure argv[] is NULL terminated in the
1635: fake popen() and run sendmail as the user, not as root.
1636: (patch included).</a>
1.294 david 1637: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1638: filesystems had an overrun in their handling of uio_offset
1639: in their readdir() routines. (These filesystems are not
1640: enabled by default). (patch included).</a>
1.294 david 1641: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1642: when we execve() a new process. (patch included).</a>
1.294 david 1643: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1644: been handled by IPsec may be transmitted as cleartext.
1645: PF_KEY SA expirations may leak kernel resources.
1646: (patch included).</a>
1.294 david 1647: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1648: motd re-writing and change the find(1) to use -execdir
1649: (patch included).</a>
1.294 david 1650: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1651: users to chflags(2) or fchflags(2) on character or block devices
1652: which they may currently be the owner of (patch included).</a>
1.294 david 1653: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1654: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1655: </ul>
1656:
1.106 deraadt 1657: <p>
1658: <li>
1.288 matthieu 1659: <a name="24"></a>
1.235 miod 1660:
1.294 david 1661: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1662: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1663: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1664: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1665:
1.96 deraadt 1666: <p>
1.75 deraadt 1667: <ul>
1.294 david 1668: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1669: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1670: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1671: another kernel crash case caused by the <strong>crashme</strong>
1672: program (patch included).</a>
1.294 david 1673: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1674: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1675: (patch included).</a>
1.294 david 1676: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1677: existed in ping(8). (patch included).</a>
1.294 david 1678: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1679: the ipq, which could permit an attacker to cause a crash.
1680: (patch included).</a>
1.294 david 1681: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1682: kernel between accept(2) and select(2) could permit an attacker
1683: to hang sockets from remote.
1684: (patch included).</a>
1.294 david 1685: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1686: bog the machine excessively and cause problems.
1687: (patch included).</a>
1.294 david 1688: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1689: DDB interacted to possibly cause a crash.
1690: (patch included).</a>
1.294 david 1691: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1692: (patch included).</a>
1.294 david 1693: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1694: problem in bootpd(8). (patch included).</a>
1.294 david 1695: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1696: exploitable problem relating to environment variables in termcap
1697: and curses. (patch included).</a>
1.294 david 1698: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1699: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1700: </ul>
1701:
1.106 deraadt 1702: <p>
1703: <li>
1.288 matthieu 1704: <a name="23"></a>
1.235 miod 1705:
1.294 david 1706: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1707: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1708: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1709: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1710:
1.96 deraadt 1711: <p>
1.53 matthieu 1712: <ul>
1.294 david 1713: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1714: problem in bootpd(8). (patch included).</a>
1.294 david 1715: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1716: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1717: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1718: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1719: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1720: chpass(1) has a file descriptor leak which allows an
1721: attacker to modify /etc/master.passwd.</a>
1.294 david 1722: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1723: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1724: should not be executed with fd slots 0, 1, or 2 free.
1725: (patch included).</a>
1.294 david 1726: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1727: libraries (patches included).</a>
1.294 david 1728: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1729: processes too permissive (4th revision patch included).</a>
1.294 david 1730: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1731: of immutable and append-only file flags. (patch included).</a>
1.294 david 1732: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1733: if IPSEC is enabled (patch included).</a>
1.294 david 1734: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1735: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1736: </ul>
1.9 deraadt 1737:
1.106 deraadt 1738: <p>
1739: <li>
1.288 matthieu 1740: <a name="22"></a>
1.235 miod 1741:
1.294 david 1742: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1743: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1744: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1745: still exist in other operating systems. (The supplied patches are for
1746: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1747:
1.96 deraadt 1748: <p>
1.9 deraadt 1749: <ul>
1.294 david 1750: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1751: packets if IPSEC is enabled (patch included).</a>
1.294 david 1752: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1753: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1754: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1755: (patch included).</a>
1.294 david 1756: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1757: (patch included).</a>
1.294 david 1758: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1759: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1760: (patch included).</a>
1.294 david 1761: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1762: export (patch included).</a>
1.112 philen 1763: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1764: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1765: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1766: Acceptance.</a>
1.294 david 1767: A patch is available <a href="errata22.html#sourceroute">here</a>.
1768: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1769: flaw (patch included).</a>
1.294 david 1770: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1771: </ul>
1772:
1.106 deraadt 1773: <p>
1774: <li>
1.288 matthieu 1775: <a name="21"></a>
1.235 miod 1776:
1.294 david 1777: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1778: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1779: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1780: exist in other operating systems. (If you are running OpenBSD 2.1, we
1781: would strongly recommend an upgrade to the newest release, as this
1782: patch list only attempts at fixing the most important security
1783: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1784: security problems. Many of those problems were solved in ways which
1785: make it hard for us to provide patches).
1786:
1.96 deraadt 1787: <p>
1.52 deraadt 1788: <ul>
1.112 philen 1789: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1790: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1791: (patch included)</a>
1.112 philen 1792: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1793: </ul>
1.51 deraadt 1794:
1.106 deraadt 1795: <p>
1796: <li>
1.288 matthieu 1797: <a name="20"></a>
1.235 miod 1798:
1.294 david 1799: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1800: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1801: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1802: exist in other operating systems. (If you are running OpenBSD 2.0, we
1803: commend you for being there back in the old days!, but you're really
1804: missing out if you don't install a new version!)
1805:
1806: <p>
1807: <ul>
1.112 philen 1808: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1809: resolver (patch included)</a>
1810: <li>Many others... if people can hunt them down, please let me know
1811: and we'll put them up here.
1812: </ul>
1.51 deraadt 1813: <p>
1.106 deraadt 1814:
1.288 matthieu 1815: <a name="watching"></a>
1.294 david 1816: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1817:
1.21 deraadt 1818: Since we take a proactive stance with security, we are continually
1819: finding and fixing new security problems. Not all of these problems
1.80 espie 1820: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1821: confirmed to be exploitable; many simple bugs we fix do turn out to
1822: have security consequences we could not predict. We do not have the
1823: time resources to make these changes available in the above format.<p>
1.21 deraadt 1824:
1825: Thus there are usually minor security fixes in the current source code
1826: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1827: guarantee that these problems are of minimal impact and unproven
1.44 ian 1828: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1829: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1830:
1.45 deraadt 1831: People who are really concerned with security can do a number of
1832: things:<p>
1.21 deraadt 1833:
1834: <ul>
1835: <li>If you understand security issues, watch our
1.294 david 1836: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1837: eye out for things which appear security related. Since
1.21 deraadt 1838: exploitability is not proven for many of the fixes we make,
1839: do not expect the relevant commit message to say "SECURITY FIX!".
1840: If a problem is proven and serious, a patch will be available
1841: here very shortly after.
1.161 horacio 1842: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1843: security-announce mailing list</a> which will notify you for every
1.186 ian 1844: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1845: and instruct you on how to patch the problem.
1.21 deraadt 1846: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1847: complete system build from time to time (read /usr/src/Makefile
1848: carefully). Users can make the assumption that the current
1849: source tree always has stronger security than the previous release.
1.45 deraadt 1850: However, building your own system from source code is not trivial;
1.397 deraadt 1851: it is nearly 850MB of source code, and problems do occur as we
1.45 deraadt 1852: transition between major releases.
1.115 ericj 1853: <li>Install a binary snapshot for your
1.80 espie 1854: architecture, which are made available fairly often. For
1.29 deraadt 1855: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1856: </ul>
1857:
1.9 deraadt 1858: <p>
1.288 matthieu 1859: <a name="reporting"></a>
1.294 david 1860: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1861:
1.5 deraadt 1862: <p> If you find a new security problem, you can mail it to
1.294 david 1863: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1864: <br>
1.5 deraadt 1865: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1866: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1867:
1.107 deraadt 1868: <p>
1.288 matthieu 1869: <a name="papers"></a>
1.294 david 1870: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1871:
1.389 lum 1872: Numerous
1873: <a href="papers/">papers</a> have been written by OpenBSD team members,
1874: many dedicated to security.
1.294 david 1875: </ul>
1.106 deraadt 1876:
1.2 deraadt 1877: <hr>
1.294 david 1878: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1879: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1880: <br>
1.398 ! sthen 1881: <small>$OpenBSD: security.html,v 1.397 2013/09/07 16:15:01 deraadt Exp $</small>
1.1 deraadt 1882:
1.24 deraadt 1883: </body>
1884: </html>
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