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1.106 deraadt 17: <p>
1.294 david 18: <h2><font color="#e00000">Security</font></h2>
19: <hr>
1.1 deraadt 20:
1.114 philen 21: <table width="100%">
22: <tr>
23: <td colspan="2">
24: <strong>Index</strong>
25: </td>
26: </tr>
27: <tr>
28: <td valign="top">
1.294 david 29: <a href="#goals">Security goals of the Project</a>.<br>
30: <a href="#disclosure">Full Disclosure policy</a>.<br>
31: <a href="#process">Source code auditing process</a>.<br>
32: <a href="#default">"Secure by Default"</a>.<br>
33: <a href="#crypto">Use of Cryptography</a>.<br>
34: <p>
35: <a href="#watching">Watching changes</a>.<br>
36: <a href="#reporting">Reporting security issues</a>.<br>
37: <a href="#papers">Further Reading</a><br>
1.106 deraadt 38: <p>
1.114 philen 39: </td>
40: <td valign="top">
1.225 deraadt 41: For security advisories for specific releases, click below:<br>
42: <a href="#20">2.0</a>,
43: <a href="#21">2.1</a>,
44: <a href="#22">2.2</a>,
45: <a href="#23">2.3</a>,
46: <a href="#24">2.4</a>,
47: <a href="#25">2.5</a>,
48: <a href="#26">2.6</a>,
49: <a href="#27">2.7</a>,
50: <a href="#28">2.8</a>,
51: <a href="#29">2.9</a>,
52: <a href="#30">3.0</a>,
53: <a href="#31">3.1</a>,
1.246 deraadt 54: <a href="#32">3.2</a>,
1.261 david 55: <a href="#33">3.3</a>,
1.387 miod 56: <a href="#34">3.4</a>,
1.388 miod 57: <a href="#35">3.5</a>,
1.365 deraadt 58: <br>
1.312 david 59: <a href="#36">3.6</a>,
1.318 deraadt 60: <a href="#37">3.7</a>,
1.321 brad 61: <a href="#38">3.8</a>,
1.334 brad 62: <a href="#39">3.9</a>,
1.348 merdely 63: <a href="#40">4.0</a>,
64: <a href="#41">4.1</a>,
1.357 brad 65: <a href="#42">4.2</a>,
1.365 deraadt 66: <a href="#43">4.3</a>,
1.377 tobias 67: <a href="#44">4.4</a>,
1.378 jasper 68: <a href="#45">4.5</a>,
1.385 jasper 69: <a href="#46">4.6</a>,
1.387 miod 70: <a href="#47">4.7</a>,
71: <a href="#48">4.8</a>,
1.390 sthen 72: <a href="#49">4.9</a>,
73: <a href="#50">5.0</a>,
1.394 lum 74: <a href="#51">5.1</a>,
75: <br>
1.395 sthen 76: <a href="#52">5.2</a>,
1.398 sthen 77: <a href="#53">5.3</a>,
78: <a href="#54">5.4</a>.
1.114 philen 79: </td>
80: </tr>
81: </table>
1.56 deraadt 82: <hr>
83:
1.294 david 84: <a name="goals"></a>
1.278 deraadt 85: <ul>
1.294 david 86: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 87:
1.14 deraadt 88: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 89: ONE in the industry for security (if we are not already there). Our
90: open software development model permits us to take a more
91: uncompromising view towards increased security than Sun, SGI, IBM, HP,
92: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 93: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 94: cryptography</a>, we are able to take cryptographic approaches towards
95: fixing security problems.<p>
1.18 deraadt 96:
1.288 matthieu 97: <a name="disclosure"></a>
1.294 david 98: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 99:
1.45 deraadt 100: Like many readers of the
1.196 jufi 101: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 102: BUGTRAQ mailing list</a>,
1.106 deraadt 103: we believe in full disclosure of security problems. In the
104: operating system arena, we were probably the first to embrace
105: the concept. Many vendors, even of free software, still try
106: to hide issues from their users.<p>
107:
108: Security information moves very fast in cracker circles. On the other
109: hand, our experience is that coding and releasing of proper security
110: fixes typically requires about an hour of work -- very fast fix
111: turnaround is possible. Thus we think that full disclosure helps the
112: people who really care about security.<p>
113:
1.288 matthieu 114: <a name="process"></a>
1.294 david 115: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 116:
1.12 deraadt 117: Our security auditing team typically has between six and twelve
1.45 deraadt 118: members who continue to search for and fix new security holes. We
119: have been auditing since the summer of 1996. The process we follow to
120: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 121: every critical software component. We are not so much looking for
122: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 123: years later someone discovers the problem used to be a security
1.106 deraadt 124: issue, and we fixed it because it was just a bug, well, all the
125: better. Flaws have been found in just about every area of the system.
126: Entire new classes of security problems have been found during our
127: audit, and often source code which had been audited earlier needs
128: re-auditing with these new flaws in mind. Code often gets audited
129: multiple times, and by multiple people with different auditing
130: skills.<p>
1.12 deraadt 131:
1.94 deraadt 132: Some members of our security auditing team worked for Secure Networks,
133: the company that made the industry's premier network security scanning
134: software package Ballista (Secure Networks got purchased by Network
135: Associates, Ballista got renamed to Cybercop Scanner, and well...)
136: That company did a lot of security research, and thus fit in well
1.106 deraadt 137: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
138: colours since day 1.<p>
1.31 deraadt 139:
1.34 deraadt 140: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 141: In most cases we have found that the determination of exploitability
142: is not an issue. During our ongoing auditing process we find many
143: bugs, and endeavor to fix them even though exploitability is not
144: proven. We fix the bug, and we move on to find other bugs to fix. We
145: have fixed many simple and obvious careless programming errors in code
146: and only months later discovered that the problems were in fact
147: exploitable. (Or, more likely someone on
1.197 jufi 148: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 149: would report that other operating systems were vulnerable to a `newly
150: discovered problem', and then it would be discovered that OpenBSD had
151: been fixed in a previous release). In other cases we have been saved
152: from full exploitability of complex step-by-step attacks because we
153: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 154: managed such a success is the lpd advisory that Secure Networks put out.
155: <p>
1.29 deraadt 156:
1.288 matthieu 157: <a name="newtech"></a>
1.294 david 158: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 159:
160: As we audit source code, we often invent new ways of solving problems.
161: Sometimes these ideas have been used before in some random application
162: written somewhere, but perhaps not taken to the degree that we do.
163: <p>
164:
165: <ul>
166: <li>strlcpy() and strlcat()
167: <li>Memory protection purify
168: <ul>
169: <li>W^X
170: <li>.rodata segment
171: <li>Guard pages
172: <li>Randomized malloc()
173: <li>Randomized mmap()
174: <li>atexit() and stdio protection
175: </ul>
1.295 otto 176: <li>Privilege separation
1.278 deraadt 177: <li>Privilege revocation
178: <li>Chroot jailing
179: <li>New uids
180: <li>ProPolice
181: <li>... and others
182: </ul>
183: <p>
184:
1.294 david 185: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 186:
1.45 deraadt 187: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 188: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 189: commonplace in security forums like
1.197 jufi 190: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 191:
1.45 deraadt 192: The most intense part of our security auditing happened immediately
1.80 espie 193: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 194: over the last third of 1996 and first half of 1997. Thousands (yes,
195: thousands) of security issues were fixed rapidly over this year-long
196: period; bugs like the standard buffer overflows, protocol
197: implementation weaknesses, information gathering, and filesystem
198: races. Hence most of the security problems that we encountered were
199: fixed before our 2.1 release, and then a far smaller number needed
200: fixing for our 2.2 release. We do not find as many problems anymore,
201: it is simply a case of diminishing returns. Recently the security
202: problems we find and fix tend to be significantly more obscure or
203: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 204:
1.35 deraadt 205: <ul>
1.45 deraadt 206: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 207: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 208: to search for more complicated exploits, so we will too.
209: <li>Finding and fixing subtle flaws in complicated software is
210: a lot of fun.
1.35 deraadt 211: </ul>
1.106 deraadt 212: <p>
1.15 deraadt 213:
1.14 deraadt 214: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 215: to find and fix new security flaws.<p>
1.12 deraadt 216:
1.288 matthieu 217: <a name="default"></a>
1.294 david 218: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 219:
220: To ensure that novice users of OpenBSD do not need to become security
221: experts overnight (a viewpoint which other vendors seem to have), we
222: ship the operating system in a Secure by Default mode. All non-essential
223: services are disabled. As the user/administrator becomes more familiar
224: with the system, he will discover that he has to enable daemons and other
225: parts of the system. During the process of learning how to enable a new
226: service, the novice is more likely to learn of security considerations.<p>
227:
228: This is in stark contrast to the increasing number of systems that
229: ship with NFS, mountd, web servers, and various other services enabled
230: by default, creating instantaneous security problems for their users
231: within minutes after their first install.<p>
232:
1.288 matthieu 233: <a name="crypto"></a>
1.294 david 234: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 235:
236: And of course, since the OpenBSD project is based in Canada, it is possible
237: for us to integrate cryptography. For more information, read the page
1.116 deraadt 238: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 239:
1.294 david 240: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 241:
242: <li>
1.398 sthen 243: <a name="54"></a>
244:
245: <h3><font color="#e00000">OpenBSD 5.4 Security Advisories</font></h3>
246: These are the OpenBSD 5.4 advisories -- all these problems are solved
247: in <a href=anoncvs.html>OpenBSD current</a> and the
248: <a href=stable.html>patch branch</a>.
249:
250: <p>
251: <ul>
252: <li><a href="errata54.html#002_sshgcm">November 7, 2013:
253: Memory corruption in post-authentication sshd process if AES-GCM cipher
254: is selected</a>
255: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
256: <li><a href="errata54.html#004_nginx">November 21, 2013:
257: Security restriction bypass in certain nginx(8) configurations</a>
258: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
259: <br>
1.403 sthen 260: <li><a href="errata54.html#006_libXfont">January 10, 2014:
1.400 matthieu 261: Buffer overflow in parsing of BDF font files</a>
1.401 matthieu 262: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6462">CVE-2013-6462</a>).
1.398 sthen 263: </ul>
264:
265: <li>
1.395 sthen 266: <a name="53"></a>
267:
268: <h3><font color="#e00000">OpenBSD 5.3 Security Advisories</font></h3>
269: These are the OpenBSD 5.3 advisories -- all these problems are solved
270: in <a href=anoncvs.html>OpenBSD current</a> and the
271: <a href=stable.html>patch branch</a>.
272:
273: <p>
274: <ul>
1.398 sthen 275: <li><a href="errata53.html#009_sshgcm">November 7, 2013:
276: Memory corruption in post-authentication sshd process if AES-GCM cipher
277: is selected</a>
278: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4548">CVE-2013-4548</a>).
279: <li><a href="errata53.html#011_nginx">November 21, 2013:
280: Security restriction bypass in certain nginx(8) configurations</a>
281: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4547">CVE-2013-4547</a>).
1.403 sthen 282: <li><a href="errata53.html#013_libXfont">January 10, 2014:
1.402 matthieu 283: Buffer overflow in parsing of BDF font files</a>
284: (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6462">CVE-2013-6462</a>).
1.395 sthen 285: </ul>
286:
1.399 deraadt 287: <br><p><b>
288: OpenBSD 5.2 and earlier releases are not supported anymore. The following
289: paragraphs only list advisories issued while they were maintained; these
290: releases are likely to be affected by the advisories for more recent releases.
291: </b><p>
292:
1.395 sthen 293: <li>
1.393 sthen 294: <a name="52"></a>
295:
296: <h3><font color="#e00000">OpenBSD 5.2 Security Advisories</font></h3>
297: These are the OpenBSD 5.2 advisories -- all these problems are solved
298: in <a href=anoncvs.html>OpenBSD current</a> and the
299: <a href=stable.html>patch branch</a>.
300:
301: <p>
302: <ul>
303: None yet!
304: </ul>
305:
306: <li>
1.390 sthen 307: <a name="51"></a>
308:
309: <h3><font color="#e00000">OpenBSD 5.1 Security Advisories</font></h3>
310: These are the OpenBSD 5.1 advisories -- all these problems are solved
311: in <a href=anoncvs.html>OpenBSD current</a> and the
312: <a href=stable.html>patch branch</a>.
313:
314: <p>
315: <ul>
1.393 sthen 316: <li><a href="errata51.html#001_libcrypto">April 23, 2012:
317: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 318: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.390 sthen 319: </ul>
320:
321: <li>
1.388 miod 322: <a name="50"></a>
323:
324: <h3><font color="#e00000">OpenBSD 5.0 Security Advisories</font></h3>
325: These are the OpenBSD 5.0 advisories -- all these problems are solved
326: in <a href=anoncvs.html>OpenBSD current</a> and the
327: <a href=stable.html>patch branch</a>.
328:
329: <p>
330: <ul>
1.393 sthen 331: <li><a href="errata50.html#002_libcrypto">April 23, 2012:
332: A heap overflow vulnerability has been found in libcrypto's ASN.1
1.396 deraadt 333: parsing code</a> (<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2110">CVE-2012-2110</a>).
1.388 miod 334: </ul>
335:
336: <li>
1.387 miod 337: <a name="49"></a>
338:
339: <h3><font color="#e00000">OpenBSD 4.9 Security Advisories</font></h3>
340: These are the OpenBSD 4.9 advisories -- all these problems are solved
341: in <a href=anoncvs.html>OpenBSD current</a> and the
342: <a href=stable.html>patch branch</a>.
343:
344: <p>
345: <ul>
346: None yet!
347: </ul>
348:
349: <li>
350: <a name="48"></a>
351:
352: <h3><font color="#e00000">OpenBSD 4.8 Security Advisories</font></h3>
353: These are the OpenBSD 4.8 advisories -- all these problems are solved
354: in <a href=anoncvs.html>OpenBSD current</a> and the
355: <a href=stable.html>patch branch</a>.
356:
357: <p>
358: <ul>
359: <li><a href="errata48.html#009_pf">February 16, 2011:
360: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
361: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
362: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
363: prefixes "10.1.1.1/30") are not affected.</a>
364: <li><a href="errata48.html#008_openssl">February 11, 2011:
365: An incorrectly formatted ClientHello handshake message could cause
366: OpenSSL to parse past the end of the message. An attacker could use
367: this flaw to trigger an invalid memory access, causing a crash of an
368: application linked to OpenSSL. As well, certain applications may expose
369: the contents of parsed OCSP extensions, specifically the OCSP nonce
370: extension.
371: <br>
372: Applications are only affected if they act as a server and call
373: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
374: that nothing in the base OS uses this. Apache httpd started using this
375: in v2.3.3; this is newer than the version in ports.</a>
376: <li><a href="errata48.html#005_pf">December 17, 2010:
377: Insufficent initialization of the pf rule structure in the ioctl
378: handler may allow userland to modify kernel memory. By default root
379: privileges are needed to add or modify pf rules.</a>
380: </ul>
381:
382: <li>
1.385 jasper 383: <a name="47"></a>
384:
385: <h3><font color="#e00000">OpenBSD 4.7 Security Advisories</font></h3>
386: These are the OpenBSD 4.7 advisories -- all these problems are solved
387: in <a href=anoncvs.html>OpenBSD current</a> and the
388: <a href=stable.html>patch branch</a>.
389:
390: <p>
391: <ul>
1.387 miod 392: <li><a href="errata47.html#013_pf">February 16, 2011:
393: PF rules specifying address ranges (e.g. "10.1.1.1 - 10.1.1.5") were
394: not correctly handled on little-endian systems (alpha, amd64, arm, i386,
395: mips64el, vax). Other address types (bare addresses "10.1.1.1" and
396: prefixes "10.1.1.1/30") are not affected.</a>
397: <li><a href="errata47.html#012_openssl">February 11, 2011:
398: An incorrectly formatted ClientHello handshake message could cause
399: OpenSSL to parse past the end of the message. An attacker could use
400: this flaw to trigger an invalid memory access, causing a crash of an
401: application linked to OpenSSL. As well, certain applications may expose
402: the contents of parsed OCSP extensions, specifically the OCSP nonce
403: extension.
404: <br>
405: Applications are only affected if they act as a server and call
406: SSL_CTX_set_tlsext_status_cb on the server's SSL_CTX. It is believed
407: that nothing in the base OS uses this. Apache httpd started using this
408: in v2.3.3; this is newer than the version in ports.</a>
409: <li><a href="errata47.html#009_pf">December 17, 2010:
410: Insufficent initialization of the pf rule structure in the ioctl
411: handler may allow userland to modify kernel memory. By default root
412: privileges are needed to add or modify pf rules.</a>
413: <li><a href="errata47.html#004_pfsync">April 23, 2010:
414: The combination of pfsync and IPSEC may crash the kernel.</a>
1.385 jasper 415: <li><a href="errata47.html#003_openssl">April 14, 2010:
416: In TLS connections, certain incorrectly formatted records can
417: cause an OpenSSL client or server to crash due to a read
1.392 tobias 418: attempt at NULL.</a>
1.385 jasper 419: </ul>
420:
421: <li>
1.378 jasper 422: <a name="46"></a>
423:
424: <h3><font color="#e00000">OpenBSD 4.6 Security Advisories</font></h3>
425: These are the OpenBSD 4.6 advisories -- all these problems are solved
426: in <a href=anoncvs.html>OpenBSD current</a> and the
427: <a href=stable.html>patch branch</a>.
428:
429: <p>
430: <ul>
1.385 jasper 431: <li><a href="errata46.html#010_openssl">April 14, 2010:
432: In TLS connections, certain incorrectly formatted records can
433: cause an OpenSSL client or server to crash due to a read
1.392 tobias 434: attempt at NULL.</a>
1.384 jasper 435: <li><a href="errata46.html#006_openssl">March 12, 2010:
436: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 437: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 438: <li><a href="errata46.html#004_openssl">November 26, 2009:
439: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 440: related to renegotiation.</a>
1.378 jasper 441: </ul>
1.382 tobias 442:
443: <li>
1.373 djm 444: <a name="45"></a>
445:
446: <h3><font color="#e00000">OpenBSD 4.5 Security Advisories</font></h3>
447: These are the OpenBSD 4.5 advisories -- all these problems are solved
448: in <a href=anoncvs.html>OpenBSD current</a> and the
449: <a href=stable.html>patch branch</a>.
450:
451: <p>
452: <ul>
1.385 jasper 453: <li><a href="errata45.html#016_openssl">April 14, 2010:
454: In TLS connections, certain incorrectly formatted records can
455: cause an OpenSSL client or server to crash due to a read
1.392 tobias 456: attempt at NULL.</a>
1.385 jasper 457: <li><a href="errata45.html#012_openssl">March 12, 2010:
1.384 jasper 458: OpenSSL is susceptible to a buffer overflow due to a failure
1.392 tobias 459: to check for NULL returns from bn_wexpand function calls.</a>
1.383 sthen 460: <li><a href="errata45.html#010_openssl">November 26, 2009:
461: The SSL/TLS protocol is subject to man-in-the-middle attacks
1.392 tobias 462: related to renegotiation.</a>
1.373 djm 463: </ul>
464:
465: <li>
1.365 deraadt 466: <a name="44"></a>
467:
468: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
469: These are the OpenBSD 4.4 advisories -- all these problems are solved
470: in <a href=anoncvs.html>OpenBSD current</a> and the
471: <a href=stable.html>patch branch</a>.
472:
473: <p>
474: <ul>
1.372 millert 475: <li><a href="errata44.html#011_sudo">February 22, 2009:
476: sudo(8) may allow a user listed in sudoers to run a command
477: as a different user than their access rule specifies when a Unix
478: group is used in the RunAs portion of the rule.</a>
1.370 djm 479: <li><a href="errata44.html#008_bind">January 15, 2009:
480: named(8) suffered from a similar logic error that may allow
481: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 482: <li><a href="errata44.html#007_openssl">January 9, 2009:
483: OpenSSL suffered from some logic errors that allowed bypass
484: of DSA/ECDSA certificate validation.</a>
1.367 brad 485: <li><a href="errata44.html#001_ndp">November 2, 2008:
486: The Neighbor Discovery Protocol (ndp) did not correctly verify
487: neighbor solicitation requests maybe allowing a nearby attacker
488: to intercept traffic.</a>
1.365 deraadt 489: </ul>
490:
491: <li>
1.357 brad 492: <a name="43"></a>
493:
494: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
495: These are the OpenBSD 4.3 advisories -- all these problems are solved
496: in <a href=anoncvs.html>OpenBSD current</a> and the
497: <a href=stable.html>patch branch</a>.
498:
499: <p>
500: <ul>
1.372 millert 501: <li><a href="errata43.html#011_sudo">February 22, 2009:
502: sudo(8) may allow a user listed in sudoers to run a command
503: as a different user than their access rule specifies when a Unix
504: group is used in the RunAs portion of the rule.</a>
1.370 djm 505: <li><a href="errata43.html#008_bind">January 15, 2009:
506: named(8) suffered from a similar logic error that may allow
507: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 508: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 509: OpenSSL suffered from some logic errors that allowed bypass
510: of DSA/ECDSA certificate validation.</a>
1.382 tobias 511: <li><a href="errata43.html#006_ndp">October 2, 2008:
1.363 brad 512: The Neighbor Discovery Protocol (ndp) did not correctly verify
513: neighbor solicitation requests maybe allowing a nearby attacker
514: to intercept traffic.</a>
1.362 brad 515: <li><a href="errata43.html#004_bind">July 23, 2008:
516: A vulnerability has been found with BIND.</a>
1.361 brad 517: <li><a href="errata43.html#003_xorg">July 15, 2008:
518: Multiple vulnerabilities in X.Org.</a>
1.359 brad 519: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 520: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 521: <li><a href="errata43.html#001_openssh">March 30, 2008:
522: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 523: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 524: </ul>
525:
526: <li>
1.348 merdely 527: <a name="42"></a>
528: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
529: These are the OpenBSD 4.2 advisories -- all these problems are solved
530: in <a href=anoncvs.html>OpenBSD current</a> and the
531: <a href=stable.html>patch branch</a>.
532:
533: <p>
534: <ul>
1.364 tobias 535: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 536: The Neighbor Discovery Protocol (ndp) did not correctly verify
537: neighbor solicitation requests maybe allowing a nearby attacker
538: to intercept traffic.</a>
1.362 brad 539: <li><a href="errata42.html#013_bind">July 23, 2008:
540: A vulnerability has been found with BIND.</a>
1.361 brad 541: <li><a href="errata42.html#012_xorg2">July 15, 2008:
542: Multiple vulnerabilities in X.Org.</a>
1.359 brad 543: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 544: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 545: <li><a href="errata42.html#010_openssh">March 30, 2008:
546: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 547: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 548: <li><a href="errata42.html#009_ppp">March 7, 2008:
549: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 550: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
551: Multiple vulnerabilities in X.Org.</a>
1.351 okan 552: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
553: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 554: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 555: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 556: </ul>
557:
558: <li>
1.346 matthieu 559: <a name="41"></a>
560:
561: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
562: These are the OpenBSD 4.1 advisories -- all these problems are solved
563: in <a href=anoncvs.html>OpenBSD current</a> and the
564: <a href=stable.html>patch branch</a>.
565:
566: <p>
567: <ul>
1.359 brad 568: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 569: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 570: <li><a href="errata41.html#015_openssh">March 30, 2008:
571: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 572: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 573: <li><a href="errata41.html#014_ppp">March 7, 2008:
574: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 575: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
576: Multiple vulnerabilities in X.Org.</a>
577: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
578: The SSL_get_shared_ciphers() function in OpenSSL contains
579: an off-by-one overflow.</a>
1.350 deraadt 580: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 581: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 582: <li><a href="errata41.html#009_file">Jul 9, 2007:
583: Fix possible heap overflow in file(1).</a>
1.346 matthieu 584: <li><a href="errata41.html#005_route6">Apr 27, 2007:
585: IPv6 type 0 route headers can be used to mount a DoS attack
586: against hosts and networks.</a>
587: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
588: Multiple vulnerabilities in X.Org.</a>
589: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
590: Incorrect mbuf handling for ICMP6 packets.</a>
591: </ul>
592:
593: <li>
1.334 brad 594: <a name="40"></a>
595: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
596: These are the OpenBSD 4.0 advisories -- all these problems are solved
597: in <a href=anoncvs.html>OpenBSD current</a> and the
598: <a href=stable.html>patch branch</a>.
599:
600: <p>
601: <ul>
1.382 tobias 602: <li><a href="errata40.html#017_openssl">Oct 10, 2007:
603: The SSL_get_shared_ciphers() function in OpenSSL contains an
604: off-by-one overflow.</a>
1.350 deraadt 605: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 606: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 607: <li><a href="errata40.html#015_file">Jul 9, 2007:
608: Fix possible heap overflow in file(1).</a>
1.343 deraadt 609: <li><a href="errata40.html#012_route6">Apr 23, 2007:
610: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 611: against hosts and networks.</a>
1.342 mbalmer 612: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
613: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 614: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
615: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 616: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 617: Insufficient validation in vga(4) may allow an attacker to gain
618: root privileges on some i386 systems.</a>
1.339 deraadt 619: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 620: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 621: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 622: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
623: found by Chris Evans.</a>
1.339 deraadt 624: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 625: Several problems have been found in OpenSSL.</a>
1.339 deraadt 626: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 627: httpd(8) does not sanitize the Expect header from an HTTP request
628: when it is reflected back in an error message, which might allow
629: cross-site scripting (XSS) style attacks.</a>
630: </ul>
631:
632: <li>
1.321 brad 633: <a name="39"></a>
634:
635: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
636: These are the OpenBSD 3.9 advisories -- all these problems are solved
637: in <a href=anoncvs.html>OpenBSD current</a> and the
638: <a href=stable.html>patch branch</a>.
639:
640: <p>
641: <ul>
1.343 deraadt 642: <li><a href="errata39.html#022_route6">Apr 23, 2007:
643: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 644: against hosts and networks.</a>
1.342 mbalmer 645: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
646: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 647: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
648: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 649: <li><a href="errata39.html#agp">Jan 3, 2007:
650: Insufficient validation in vga(4) may allow an attacker to gain
651: root privileges on some i386 systems.</a>
1.336 brad 652: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 653: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 654: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 655: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 656: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 657: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 658: found by Chris Evans.</a>
1.333 deraadt 659: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 660: Several problems have been found in OpenSSL.</a>
1.333 deraadt 661: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 662: httpd(8) does not sanitize the Expect header from an HTTP request
663: when it is reflected back in an error message, which might allow
664: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 665: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 666: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
667: possible for an attacker to construct an invalid signature which
668: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 669: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 670: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 671: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 672: Due to the failure to correctly validate LCP configuration option
673: lengths, it is possible for an attacker to send LCP packets via an
674: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 675: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 676: A problem in isakmpd(8) caused IPsec to run partly without replay
677: protection.</a>
1.333 deraadt 678: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 679: It is possible to cause the kernel to panic when more than the default
680: number of sempahores have been allocated.</a>
1.333 deraadt 681: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 682: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
683: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
684: option.</a>
1.333 deraadt 685: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 686: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 687: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 688: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
689: overflow.</a>
1.333 deraadt 690: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 691: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 692: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 693: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 694: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 695: A race condition has been reported to exist in the handling by sendmail
696: of asynchronous signals.</a>
697: </ul>
698:
699: <li>
1.318 deraadt 700: <a name="38"></a>
701:
702: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
703: These are the OpenBSD 3.8 advisories -- all these problems are solved
704: in <a href=anoncvs.html>OpenBSD current</a> and the
705: <a href=stable.html>patch branch</a>.
706:
707: <p>
708: <ul>
1.332 brad 709: <li><a href="errata38.html#ssh2">Oct 12, 2006:
710: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 711: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 712: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 713: found by Chris Evans.</a>
714: <li><a href="errata38.html#openssl2">Oct 7, 2006:
715: Several problems have been found in OpenSSL.</a>
716: <li><a href="errata38.html#httpd2">Oct 7, 2006:
717: httpd(8) does not sanitize the Expect header from an HTTP request
718: when it is reflected back in an error message, which might allow
719: cross-site scripting (XSS) style attacks.</a>
1.329 brad 720: <li><a href="errata38.html#openssl">Sep 8, 2006:
721: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
722: possible for an attacker to construct an invalid signature which
723: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 724: <li><a href="errata38.html#bind">Sep 8, 2006:
725: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 726: <li><a href="errata38.html#sppp">Sep 2, 2006:
727: Due to the failure to correctly validate LCP configuration option
728: lengths, it is possible for an attacker to send LCP packets via an
729: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 730: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
731: A problem in isakmpd(8) caused IPsec to run partly without replay
732: protection.</a>
733: <li><a href="errata38.html#sem">Aug 25, 2006:
734: It is possible to cause the kernel to panic when more than the default
735: number of sempahores have been allocated.</a>
736: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
737: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
738: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
739: option.</a>
740: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
741: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 742: <li><a href="errata38.html#httpd">Jul 30, 2006:
743: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
744: overflow.</a>
1.324 brad 745: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
746: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 747: <li><a href="errata38.html#xorg">May 2, 2006:
748: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 749: <li><a href="errata38.html#sendmail">Mar 25, 2006:
750: A race condition has been reported to exist in the handling by sendmail
751: of asynchronous signals.</a>
752: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 753: Josh Bressers has reported a weakness in OpenSSH caused due to the
754: insecure use of the system(3) function in scp(1) when performing copy
755: operations using filenames that are supplied by the user from the
756: command line.</a>
1.321 brad 757: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 758: Do not allow users to trick suid programs into re-opening files via
759: /dev/fd.</a>
1.321 brad 760: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 761: A buffer overflow has been found in the Perl interpreter with the
762: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 763: </ul>
764:
765: <li>
1.312 david 766: <a name="37"></a>
767:
768: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
769: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 770: in <a href="anoncvs.html">OpenBSD current</a>. The
771: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
772: you should update your machine.
1.312 david 773:
774: <p>
775: <ul>
1.322 brad 776: <li><a href="errata37.html#xorg">May 2, 2006:
777: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 778: <li><a href="errata37.html#sendmail">Mar 25, 2006:
779: A race condition has been reported to exist in the handling by sendmail
780: of asynchronous signals.</a>
1.320 brad 781: <li><a href="errata37.html#ssh">Feb 12, 2006:
782: Josh Bressers has reported a weakness in OpenSSH caused due to the
783: insecure use of the system(3) function in scp(1) when performing copy
784: operations using filenames that are supplied by the user from the
785: command line.</a>
1.319 brad 786: <li><a href="errata37.html#fd">Jan 5, 2006:
787: Do not allow users to trick suid programs into re-opening files via
788: /dev/fd.</a>
789: <li><a href="errata37.html#perl">Jan 5, 2006:
790: A buffer overflow has been found in the Perl interpreter with the
791: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 792: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 793: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 794: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 795: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 796: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 797: Fix a race condition in sudo(8) that could allow a user
1.315 millert 798: to run arbitrary commands.</a>
1.318 deraadt 799: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 800: Fix a buffer overflow, memory leaks, and NULL pointer
801: dereference in cvs(1).</a>
1.312 david 802: </ul>
803:
804: <li>
1.301 miod 805: <a name="36"></a>
806:
807: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
808: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 809: in <a href="anoncvs.html">OpenBSD current</a>. The
810: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
811: you should update your machine.
1.301 miod 812:
813: <p>
1.302 markus 814: <ul>
1.317 millert 815: <li><a href="errata36.html#libz2">Jul 21, 2005:
816: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 817: <li><a href="errata36.html#libz">Jul 6, 2005:
818: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 819: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 820: Fix a race condition in sudo(8) that could allow a user
1.315 millert 821: to run arbitrary commands.</a>
1.311 deraadt 822: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 823: Fix a buffer overflow, memory leaks, and NULL pointer
824: dereference in cvs(1).</a>
1.311 deraadt 825: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 826: Due to buffer overflows in telnet(1), a malicious
827: server or man-in-the-middle attack could allow
828: execution of arbitrary code with the privileges of
829: the user invoking telnet(1).</a>
1.311 deraadt 830: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 831: More stringent checking should be done in the copy(9)
832: functions to prevent their misuse.</a>
1.311 deraadt 833: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 834: More stringent checking should be done in the copy(9)
835: functions to prevent their misuse.</a>
1.311 deraadt 836: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 837: httpd(8)'s mod_include module fails to properly validate
838: the length of user supplied tag strings prior to copying
1.305 brad 839: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 840: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 841: On systems running isakmpd(8) it is possible for a local
842: user to cause kernel memory corruption and system panic by
1.303 markus 843: setting ipsec(4) credentials on a socket.</a>
1.302 markus 844: </ul>
1.301 miod 845:
846: <li>
1.288 matthieu 847: <a name="35"></a>
1.279 deraadt 848:
1.294 david 849: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 850: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 851: in <a href="anoncvs.html">OpenBSD current</a>. The
852: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
853: you should update your machine.
1.279 deraadt 854:
855: <p>
856: <ul>
1.310 brad 857: <li><a href="errata35.html#cvs4">Apr 28, 2005:
858: Fix a buffer overflow, memory leaks, and NULL pointer
859: dereference in cvs(1).</a>
1.309 brad 860: <li><a href="errata35.html#telnet">Mar 30, 2005:
861: Due to buffer overflows in telnet(1), a malicious
862: server or man-in-the-middle attack could allow
863: execution of arbitrary code with the privileges of
864: the user invoking telnet(1).</a>
1.308 brad 865: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 866: More stringent checking should be done in the copy(9)
867: functions to prevent their misuse.</a>
1.306 brad 868: <li><a href="errata35.html#locore">Feb 28, 2005:
869: More stringent checking should be done in the copy(9)
870: functions to prevent their misuse.</a>
1.304 brad 871: <li><a href="errata35.html#httpd3">Jan 12, 2005:
872: httpd(8)'s mod_include module fails to properly validate
873: the length of user supplied tag strings prior to copying
1.305 brad 874: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 875: <li><a href="errata35.html#pfkey">Dec 14, 2004:
876: On systems running isakmpd(8) it is possible for a local
877: user to cause kernel memory corruption and system panic by
1.303 markus 878: setting ipsec(4) credentials on a socket.</a>
1.301 miod 879: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 880: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 881: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 882: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 883: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 884: httpd(8)'s mod_rewrite module can be made to write one zero byte in
885: an arbitrary memory position outside of a char array, causing a DoS
886: or possibly buffer overflows.</a>
1.301 miod 887: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 888: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 889: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 890: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 891: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 892: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 893: Multiple remote vulnerabilities have been found in the cvs(1)
894: server which can be used by CVS clients to crash or execute
1.293 brad 895: arbitrary code on the server.</a>
1.301 miod 896: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 897: kdc(8) performs inadequate checking of request fields, leading
898: to the possibility of principal impersonation from other
899: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 900: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 901: xdm(1) ignores the requestPort resource and creates a
1.293 brad 902: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 903: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 904: A buffer overflow in the cvs(1) server has been found,
905: which can be used by CVS clients to execute arbitrary code on
1.293 brad 906: the server.</a>
1.301 miod 907: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 908: Integer overflow problems were found in procfs, allowing
1.293 brad 909: reading of arbitrary kernel memory.</a>
1.301 miod 910: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 911: Pathname validation problems have been found in cvs(1),
912: allowing clients and servers access to files outside the
1.293 brad 913: repository or local CVS tree.</a>
1.279 deraadt 914: </ul>
915:
916: <p>
917: <li>
1.288 matthieu 918: <a name="34"></a>
1.261 david 919:
1.294 david 920: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 921: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 922: in <a href="anoncvs.html">OpenBSD current</a>. The
923: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
924: you should update your machine.
1.261 david 925: <p>
926: <ul>
1.302 markus 927: <li><a href="errata34.html#pfkey">Dec 14, 2004:
928: On systems running isakmpd(8) it is possible for a local
929: user to cause kernel memory corruption and system panic by
1.303 markus 930: setting ipsec(4) credentials on a socket.</a>
1.298 brad 931: <li><a href="errata34.html#xpm">Sep 16, 2004:
932: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 933: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
934: httpd(8)'s mod_rewrite module can be made to write one zero byte in
935: an arbitrary memory position outside of a char array, causing a DoS
936: or possibly buffer overflows.</a>
1.294 david 937: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 938: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 939: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 940: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 941: an attacker can delete IPsec tunnels at will.</a>
1.294 david 942: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 943: Multiple remote vulnerabilities have been found in the cvs(1)
944: server which can be used by CVS clients to crash or execute
1.293 brad 945: arbitrary code on the server.</a>
1.294 david 946: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 947: kdc(8) performs inadequate checking of request fields, leading
948: to the possibility of principal impersonation from other
949: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 950: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 951: A buffer overflow in the cvs(1) server has been found,
952: which can be used by CVS clients to execute arbitrary code on
953: the server.</a>
1.294 david 954: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 955: Integer overflow problems were found in procfs, allowing
956: reading of arbitrary kernel memory.</a>
1.294 david 957: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 958: Pathname validation problems have been found in cvs(1),
959: allowing clients and servers access to files outside the
960: repository or local CVS tree.</a>
1.294 david 961: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 962: A missing check for a NULL-pointer dereference may allow a
1.281 otto 963: remote attacker to crash applications using OpenSSL.</a>
1.294 david 964: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 965: Defects in the payload validation and processing functions of
966: isakmpd have been discovered. An attacker could send malformed
967: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 968: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 969: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
970: access module, using IP addresses without a netmask on big endian
971: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 972: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 973: An IPv6 MTU handling problem exists that could be used by an
974: attacker to cause a denial of service attack.</a>
1.294 david 975: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 976: A reference counting bug in shmat(2) could be used to write to
977: kernel memory under certain circumstances.</a>
1.294 david 978: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 979: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 980: by Thomas Walpuski.</a>
1.294 david 981: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 982: It may be possible for a local user to overrun the stack in
983: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 984: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 985: The use of certain ASN.1 encodings or malformed public keys may
986: allow an attacker to mount a denial of service attack against
987: applications linked with ssl(3).</a>
1.261 david 988: </ul>
989:
990: <li>
1.288 matthieu 991: <a name="33"></a>
1.246 deraadt 992:
1.294 david 993: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 994: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 995: in <a href="anoncvs.html">OpenBSD current</a>. The
996: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 997: you should update your machine.
1.246 deraadt 998: <p>
999: <ul>
1.294 david 1000: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 1001: Pathname validation problems have been found in cvs(1),
1002: allowing clients and servers access to files outside the
1003: repository or local CVS tree.</a>
1.294 david 1004: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 1005: A missing check for a NULL-pointer dereference may allow a
1.281 otto 1006: remote attacker to crash applications using OpenSSL.</a>
1.294 david 1007: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 1008: Defects in the payload validation and processing functions of
1009: isakmpd have been discovered. An attacker could send malformed
1010: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 1011: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 1012: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
1013: access module, using IP addresses without a netmask on big endian
1014: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 1015: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 1016: An IPv6 MTU handling problem exists that could be used by an
1017: attacker to cause a denial of service attack.</a>
1.294 david 1018: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 1019: A reference counting bug in shmat(2) could be used to write to
1020: kernel memory under certain circumstances.</a>
1.294 david 1021: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 1022: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 1023: by Thomas Walpuski.</a>
1.294 david 1024: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 1025: It may be possible for a local user to execute arbitrary code
1026: resulting in escalation of privileges due to a stack overrun
1027: in compat_ibcs2(8).</a>
1.294 david 1028: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 1029: The use of certain ASN.1 encodings or malformed public keys may
1030: allow an attacker to mount a denial of service attack against
1031: applications linked with ssl(3).</a>
1.294 david 1032: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 1033: Access of freed memory in pf(4) could be used to
1.260 margarid 1034: remotely panic a machine using scrub rules.</a>
1.294 david 1035: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 1036: A buffer overflow in the address parsing in
1037: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1038: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 1039: OpenSSH versions prior to 3.7 contains a buffer management error
1040: that is potentially exploitable.</a>
1.294 david 1041: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 1042: Root may be able to reduce the security level by taking advantage of
1043: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 1044: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 1045: An improper bounds check in the kernel may allow a local user
1046: to panic the kernel.</a>
1.294 david 1047: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 1048: An off-by-one error exists in the C library function realpath(3)
1049: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 1050: </ul>
1051:
1.265 miod 1052:
1.247 david 1053: <p>
1.246 deraadt 1054: <li>
1.288 matthieu 1055: <a name="32"></a>
1.224 deraadt 1056:
1.294 david 1057: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 1058: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 1059: in <a href="anoncvs.html">OpenBSD current</a>. The
1060: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 1061: you should update your machine.
1.224 deraadt 1062: <p>
1063: <ul>
1.294 david 1064: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 1065: The use of certain ASN.1 encodings or malformed public keys may
1066: allow an attacker to mount a denial of service attack against
1067: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 1068: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 1069: Access of freed memory in pf(4) could be used to
1.260 margarid 1070: remotely panic a machine using scrub rules.</a>
1.294 david 1071: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 1072: A buffer overflow in the address parsing in
1073: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1074: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 1075: OpenSSH versions prior to 3.7 contains a buffer management error
1076: that is potentially exploitable.</a>
1.294 david 1077: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 1078: Fix for a potential security issue in
1079: sendmail(8) with respect to DNS maps.</a>
1.294 david 1080: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 1081: An off-by-one error exists in the C library function realpath(3)
1082: may allow an attacker to gain escalated privileges.</a>
1.294 david 1083: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 1084: A buffer overflow in the address parsing in
1085: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1086: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 1087: A cryptographic weaknesses in the Kerberos v4 protocol can be
1088: exploited on Kerberos v5 as well.</a>
1.294 david 1089: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 1090: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1091: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1092: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 1093: Various SSL and TLS operations in OpenSSL are vulnerable to
1094: timing attacks.</a>
1.294 david 1095: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 1096: A buffer overflow in lprm(1) may allow an attacker to elevate
1.392 tobias 1097: privileges to user daemon.</a>
1.294 david 1098: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 1099: A buffer overflow in the envelope comments processing in
1100: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1101: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 1102: httpd(8) leaks file inode numbers via ETag header as well as
1103: child PIDs in multipart MIME boundary generation. This could
1104: lead, for example, to NFS exploitation because it uses inode
1105: numbers as part of the file handle.</a>
1.294 david 1106: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 1107: In ssl(8) an information leak can occur via timing by performing
1108: a MAC computation even if incorrect block cipher padding has
1109: been found, this is a countermeasure. Also, check for negative
1110: sizes, in allocation routines.</a>
1.294 david 1111: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 1112: A double free exists in cvs(1) that could lead to privilege
1113: escalation for cvs configurations where the cvs command is
1.233 margarid 1114: run as a privileged user.</a>
1.294 david 1115: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 1116: A buffer overflow exists in named(8) that could lead to a
1117: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1118: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 1119: A logic error in the pool kernel memory allocator could cause
1120: memory corruption in low-memory situations, causing the system
1121: to crash.</a>
1.294 david 1122: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 1123: An attacker can bypass smrsh(8)'s restrictions and execute
1124: arbitrary commands with the privileges of his own account.</a>
1.294 david 1125: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 1126: Network bridges running pf with scrubbing enabled could cause
1127: mbuf corruption, causing the system to crash.</a>
1.294 david 1128: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 1129: A buffer overflow can occur in the kadmind(8) daemon, leading
1130: to possible remote crash or exploit.</a>
1.224 deraadt 1131: </ul>
1132:
1.227 miod 1133: <p>
1134: <li>
1.288 matthieu 1135: <a name="31"></a>
1.203 deraadt 1136:
1.294 david 1137: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 1138: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 1139: in <a href="anoncvs.html">OpenBSD current</a>. The
1140: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 1141: you should update your machine.
1.203 deraadt 1142:
1143: <p>
1144: <ul>
1.294 david 1145: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 1146: A buffer overflow in the address parsing in
1147: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1148: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 1149: A cryptographic weaknesses in the Kerberos v4 protocol can be
1150: exploited on Kerberos v5 as well.</a>
1.294 david 1151: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 1152: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 1153: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 1154: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 1155: Various SSL and TLS operations in OpenSSL are vulnerable to
1156: timing attacks.</a>
1.294 david 1157: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 1158: A buffer overflow in lprm(1) may allow an attacker to gain
1159: root privileges.</a>
1.294 david 1160: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 1161: A buffer overflow in the envelope comments processing in
1162: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 1163: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 1164: In ssl(8) an information leak can occur via timing by performing
1165: a MAC computation even if incorrect block cipher padding has
1166: been found, this is a countermeasure. Also, check for negative
1167: sizes, in allocation routines.</a>
1.294 david 1168: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 1169: A double free exists in cvs(1) that could lead to privilege
1170: escalation for cvs configurations where the cvs command is
1.392 tobias 1171: run as a privileged user.</a>
1.294 david 1172: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 1173: A buffer overflow exists in named(8) that could lead to a
1174: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1175: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 1176: Incorrect argument checking in the getitimer(2) system call
1177: may allow an attacker to crash the system.</a>
1.294 david 1178: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 1179: An attacker can bypass smrsh(8)'s restrictions and execute
1180: arbitrary commands with the privileges of his own account.</a>
1.294 david 1181: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 1182: A buffer overflow can occur in the kadmind(8) daemon, leading
1183: to possible remote crash or exploit.</a>
1.294 david 1184: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 1185: Incorrect argument checking in the setitimer(2) system call
1186: may allow an attacker to write to kernel memory.</a>
1.294 david 1187: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 1188: An insufficient boundary check in the select system call
1.220 miod 1189: allows an attacker to overwrite kernel memory and execute arbitrary code
1190: in kernel context.</a>
1.294 david 1191: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 1192: Several remote buffer overflows can occur in the SSL2 server and SSL3
1193: client of the ssl(8) library, as in the ASN.1 parser code in the
1194: crypto(3) library, all of them being potentially remotely
1195: exploitable.</a>
1.294 david 1196: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 1197: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1198: possible remote crash.</a>
1.294 david 1199: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 1200: A race condition exists in the pppd(8) daemon which may cause it to
1201: alter the file permissions of an arbitrary file.</a>
1.294 david 1202: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 1203: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1204: crash.</a>
1.294 david 1205: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 1206: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1207: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 1208: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1209: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1210: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 1211: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1212: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 1213: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1214: input validation error that can result in an integer overflow and
1215: privilege escalation.</a>
1.294 david 1216: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 1217: A buffer overflow can occur during the interpretation of chunked
1218: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1219: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 1220: Under certain conditions, on systems using YP with netgroups
1221: in the password database, it is possible that sshd(8) does
1222: ACL checks for the requested user name but uses the password
1223: database entry of a different user for authentication. This
1224: means that denied users might authenticate successfully
1225: while permitted users could be locked out.</a>
1.294 david 1226: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1227: A race condition exists that could defeat the kernel's
1228: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1229: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1230: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1231: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1232: A local user can gain super-user privileges due to a buffer
1233: overflow in sshd(8) if AFS has been configured on the system
1234: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1235: in the sshd_config file.</a>
1.203 deraadt 1236: </ul>
1237:
1.235 miod 1238: <p>
1.203 deraadt 1239: <li>
1.288 matthieu 1240: <a name="30"></a>
1.187 deraadt 1241:
1.294 david 1242: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1243: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1244: in <a href="anoncvs.html">OpenBSD current</a>. The
1245: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1246: you should update your machine.
1.187 deraadt 1247:
1248: <p>
1249: <ul>
1.294 david 1250: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1251: A buffer overflow exists in named(8) that could lead to a
1252: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1253: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1254: Incorrect argument checking in the getitimer(2) system call
1255: may allow an attacker to crash the system.</a>
1.294 david 1256: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1257: An attacker can bypass smrsh(8)'s restrictions and execute
1258: arbitrary commands with the privileges of his own account.</a>
1.294 david 1259: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1260: A buffer overflow can occur in the kadmind(8) daemon, leading
1261: to possible remote crash or exploit.</a>
1.294 david 1262: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1263: Incorrect argument checking in the setitimer(2) system call
1264: may allow an attacker to write to kernel memory.</a>
1.294 david 1265: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1266: An insufficient boundary check in the select and poll system calls
1267: allows an attacker to overwrite kernel memory and execute arbitrary code
1268: in kernel context.</a>
1.294 david 1269: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1270: Several remote buffer overflows can occur in the SSL2 server and SSL3
1271: client of the ssl(8) library, as in the ASN.1 parser code in the
1272: crypto(3) library, all of them being potentially remotely
1273: exploitable.</a>
1.294 david 1274: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1275: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1276: possible remote crash.</a>
1.294 david 1277: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1278: A race condition exists in the pppd(8) daemon which may cause it to
1279: alter the file permissions of an arbitrary file.</a>
1.294 david 1280: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1281: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1282: crash.</a>
1.294 david 1283: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1284: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1285: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1286: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1287: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1288: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1289: input validation error that can result in an integer overflow and
1290: privilege escalation.</a>
1.294 david 1291: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1292: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1293: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1294: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1295: A buffer overflow can occur during the interpretation of chunked
1296: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1297: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1298: A race condition exists that could defeat the kernel's
1299: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1300: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1301: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1302: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1303: A local user can gain super-user privileges due to a buffer
1304: overflow in sshd(8) if AFS has been configured on the system
1305: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1306: in the sshd_config file.</a>
1.294 david 1307: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1308: The mail(1) was interpreting tilde escapes even when invoked
1309: in non-interactive mode. As mail(1) is called as root from cron,
1310: this can lead to a local root compromise.</a>
1.294 david 1311: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1312: Under certain conditions, on systems using YP with netgroups in
1313: the password database, it is possible for the rexecd(8) and rshd(8)
1314: daemons to execute a shell from a password database entry for a
1315: different user. Similarly, atrun(8) may change to the wrong
1316: home directory when running jobs.</a>
1.294 david 1317: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1318: A potential double free() exists in the zlib library;
1319: this is not exploitable on OpenBSD.
1320: The kernel also contains a copy of zlib; it is not
1321: currently known if the kernel zlib is exploitable.</a>
1.294 david 1322: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1323: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1324: may allow a local user to gain super-user privileges.</a>
1.294 david 1325: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1326: A race condition between the ptrace(2) and execve(2) system calls
1327: allows an attacker to modify the memory contents of suid/sgid
1328: processes which could lead to compromise of the super-user account.</a>
1.294 david 1329: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1330: There is a security hole in sudo(8) that can be exploited
1331: when the Postfix sendmail replacement is installed that may
1332: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1333: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1334: An attacker can trick a machine running the lpd daemon into
1335: creating new files in the root directory from a machine with
1336: remote line printer access.</a>
1.294 david 1337: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1338: The vi.recover script can be abused in such a way as
1339: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1340: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1341: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1342: resulting in a crash.</a>
1.294 david 1343: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1344: A security hole that may allow an attacker to partially authenticate
1345: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1346: </ul>
1347:
1348: <p>
1349: <li>
1.288 matthieu 1350: <a name="29"></a>
1.173 deraadt 1351:
1.294 david 1352: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1353: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1354: in <a href="anoncvs.html">OpenBSD current</a>. The
1355: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1356: you should update your machine.
1357:
1.173 deraadt 1358:
1359: <p>
1360: <ul>
1.294 david 1361: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1362: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1363: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1364: A race condition exists that could defeat the kernel's
1365: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1366: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1367: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1368: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1369: A local user can gain super-user privileges due to a buffer
1370: overflow in sshd(8) if AFS has been configured on the system
1371: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1372: in the sshd_config file.</a>
1.294 david 1373: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1374: The mail(1) was interpreting tilde escapes even when invoked
1375: in non-interactive mode. As mail(1) is called as root from cron,
1376: this can lead to a local root compromise.</a>
1.294 david 1377: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1378: A potential double free() exists in the zlib library;
1379: this is not exploitable on OpenBSD.
1380: The kernel also contains a copy of zlib; it is not
1381: currently known if the kernel zlib is exploitable.</a>
1.294 david 1382: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1383: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1384: may allow a local user to gain super-user privileges.</a>
1.294 david 1385: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1386: A race condition between the ptrace(2) and execve(2) system calls
1387: allows an attacker to modify the memory contents of suid/sgid
1388: processes which could lead to compromise of the super-user account.</a>
1.294 david 1389: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1390: There is a security hole in sudo(8) that can be exploited
1391: when the Postfix sendmail replacement is installed that may
1392: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1393: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1394: An attacker can trick a machine running the lpd daemon into
1395: creating new files in the root directory from a machine with
1396: remote line printer access.</a>
1.294 david 1397: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1398: The vi.recover script can be abused in such a way as
1399: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1400: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1401: A security hole exists in uuxqt(8) that may allow an
1402: attacker to gain root privileges.</a>
1.294 david 1403: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1404: A security hole exists in lpd(8) that may allow an
1405: attacker to gain root privileges if lpd is running.</a>
1.294 david 1406: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1407: A security hole exists in sendmail(8) that may allow an
1408: attacker on the local host to gain root privileges.</a>
1.294 david 1409: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1410: A kernel buffer overflow in the NFS code can be used to execute
1411: arbitrary code by users with mount privileges (only root by
1.181 millert 1412: default).</a>
1.294 david 1413: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1414: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1415: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1416: sshd(8) allows users to delete arbitrary files named "cookies"
1417: if X11 forwarding is enabled. X11 forwarding is disabled
1418: by default.</a>
1.294 david 1419: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1420: Programs using the fts routines can be tricked into changing
1421: into the wrong directory.</a>
1.294 david 1422: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1423: Sendmail signal handlers contain unsafe code,
1424: leading to numerous race conditions.</a>
1.173 deraadt 1425: </ul>
1426:
1427: <p>
1428: <li>
1.288 matthieu 1429: <a name="28"></a>
1.152 deraadt 1430:
1.294 david 1431: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1432: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1433: in <a href="anoncvs.html">OpenBSD current</a>. The
1434: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1435: you should update your machine.
1436:
1.152 deraadt 1437:
1438: <p>
1439: <ul>
1.294 david 1440: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1441: A security hole exists in uuxqt(8) that may allow an
1442: attacker to gain root privileges.</a>
1.294 david 1443: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1444: A security hole exists in lpd(8) that may allow an
1445: attacker to gain root privileges if lpd is running.</a>
1.294 david 1446: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1447: A security hole exists in sendmail(8) that may allow an
1448: attacker on the local host to gain root privileges.</a>
1.294 david 1449: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1450: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1451: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1452: Programs using the fts routines can be tricked into changing
1453: into the wrong directory.</a>
1.294 david 1454: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1455: Sendmail signal handlers contain unsafe code,
1456: leading to numerous race conditions.</a>
1.294 david 1457: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1458: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1459: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1460: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1461: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1462: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1463: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1464: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1465: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1466: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1467: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1468: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1469: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1470: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1471: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1472: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1473: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1474: rnd(4) did not use all of its input when written to.</a>
1.294 david 1475: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1476: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1477: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1478: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1479: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1480: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1481: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1482: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1483: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1484: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1485: </ul>
1486:
1487: <p>
1488: <li>
1.288 matthieu 1489: <a name="27"></a>
1.124 deraadt 1490:
1.294 david 1491: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1492: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1493: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1494: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1495:
1496: <p>
1497: <ul>
1.294 david 1498: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1499: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1500: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1501: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1502: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1503: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1504: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1505: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1506: (patch included)</a>
1.294 david 1507: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1508: X11 libraries have 2 potential overflows in xtrans code.
1509: (patch included)</a>
1.294 david 1510: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1511: Apache mod_rewrite and mod_vhost_alias modules could expose files
1512: on the server in certain configurations if used.
1513: (patch included)</a>
1.294 david 1514: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1515: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1516: TERMPATH and TERMCAP environment variables as it should.
1517: (patch included)</a>
1.294 david 1518: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1519: There are printf-style format string bugs in several privileged
1520: programs. (patch included)</a>
1.294 david 1521: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1522: libcurses honored terminal descriptions in the $HOME/.terminfo
1523: directory as well as in the TERMCAP environment variable for
1524: setuid and setgid applications.
1.146 deraadt 1525: (patch included)</a>
1.294 david 1526: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1527: A format string vulnerability exists in talkd(8).
1528: (patch included)</a>
1.294 david 1529: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1530: A format string vulnerability exists in the pw_error() function of the
1531: libutil library, yielding localhost root through chpass(1).
1532: (patch included)</a>
1.294 david 1533: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1534: Bad ESP/AH packets could cause a crash under certain conditions.
1535: (patch included)</a>
1.294 david 1536: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1537: A format string vulnerability (localhost root) exists in xlock(1).
1538: (patch included)</a>
1.294 david 1539: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1540: Various bugs found in X11 libraries have various side effects, almost
1541: completely denial of service in OpenBSD.
1542: (patch included)</a>
1.294 david 1543: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1544: Just like pretty much all the other unix ftp daemons
1545: on the planet, ftpd had a remote root hole in it.
1546: Luckily, ftpd was not enabled by default.
1.137 deraadt 1547: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1548: (patch included)</a>
1.294 david 1549: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1550: Mopd, very rarely used, contained some buffer overflows.
1551: (patch included)</a>
1.294 david 1552: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1553: libedit would check for a <b>.editrc</b> file in the current
1554: directory. Not known to be a real security issue, but a patch
1555: is available anyways.
1556: (patch included)</a>
1.294 david 1557: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1558: A serious bug in dhclient(8) could allow strings from a
1559: malicious dhcp server to be executed in the shell as root.
1560: (patch included)</a>
1.294 david 1561: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1562: A serious bug in isakmpd(8) policy handling wherein
1563: policy verification could be completely bypassed in isakmpd.
1564: (patch included)</a>
1.294 david 1565: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1566: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1567: should not be used, and results in security problems on
1568: other operating systems.</a>
1.294 david 1569: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1570: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1571: (patch included)</a>
1.294 david 1572: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1573: Improper use of ipf <i>keep-state</i> rules can result
1574: in firewall rules being bypassed. (patch included)</a>
1575:
1.124 deraadt 1576: </ul>
1577:
1578: <p>
1579: <li>
1.288 matthieu 1580: <a name="26"></a>
1.119 deraadt 1581:
1.294 david 1582: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1583: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1584: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1585: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1586:
1587: <p>
1588: <ul>
1.294 david 1589: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1590: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1591: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1592: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1593: Improper use of ipf <i>keep-state</i> rules can result
1594: in firewall rules being bypassed. (patch included)</a>
1.294 david 1595: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1596: xlockmore has a bug which a localhost attacker can use to gain
1597: access to the encrypted root password hash (which is normally
1.245 miod 1598: encoded using blowfish</a> (see
1.294 david 1599: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1600: crypt(3)</a>)
1.245 miod 1601: (patch included).
1.294 david 1602: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1603: Systems running with procfs enabled and mounted are
1604: vulnerable to a very tricky exploit. procfs is not
1605: mounted by default.
1606: (patch included).</a>
1.294 david 1607: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1608: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1609: thus exposing the system to a race where the aliases file
1610: did not exist.
1.119 deraadt 1611: (patch included).</a>
1.294 david 1612: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1613: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1614: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1615: A buffer overflow in the RSAREF code included in the
1616: USA version of libssl, is possibly exploitable in
1617: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1618: (patch included).<br></a>
1619: <strong>Update:</strong> Turns out that this was not exploitable
1620: in any of the software included in OpenBSD 2.6.
1.294 david 1621: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1622: Any user could change interface media configurations, resulting in
1623: a localhost denial of service attack.
1.121 deraadt 1624: (patch included).</a>
1.119 deraadt 1625: </ul>
1626:
1627: <p>
1628: <li>
1.288 matthieu 1629: <a name="25"></a>
1.106 deraadt 1630:
1.294 david 1631: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1632: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1633: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1634: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1635:
1.96 deraadt 1636: <p>
1.104 deraadt 1637: <ul>
1.294 david 1638: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1639: In cron(8), make sure argv[] is NULL terminated in the
1640: fake popen() and run sendmail as the user, not as root.
1641: (patch included).</a>
1.294 david 1642: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1643: filesystems had an overrun in their handling of uio_offset
1644: in their readdir() routines. (These filesystems are not
1645: enabled by default). (patch included).</a>
1.294 david 1646: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1647: when we execve() a new process. (patch included).</a>
1.294 david 1648: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1649: been handled by IPsec may be transmitted as cleartext.
1650: PF_KEY SA expirations may leak kernel resources.
1651: (patch included).</a>
1.294 david 1652: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1653: motd re-writing and change the find(1) to use -execdir
1654: (patch included).</a>
1.294 david 1655: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1656: users to chflags(2) or fchflags(2) on character or block devices
1657: which they may currently be the owner of (patch included).</a>
1.294 david 1658: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1659: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1660: </ul>
1661:
1.106 deraadt 1662: <p>
1663: <li>
1.288 matthieu 1664: <a name="24"></a>
1.235 miod 1665:
1.294 david 1666: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1667: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1668: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1669: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1670:
1.96 deraadt 1671: <p>
1.75 deraadt 1672: <ul>
1.294 david 1673: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1674: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1675: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1676: another kernel crash case caused by the <strong>crashme</strong>
1677: program (patch included).</a>
1.294 david 1678: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1679: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1680: (patch included).</a>
1.294 david 1681: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1682: existed in ping(8). (patch included).</a>
1.294 david 1683: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1684: the ipq, which could permit an attacker to cause a crash.
1685: (patch included).</a>
1.294 david 1686: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1687: kernel between accept(2) and select(2) could permit an attacker
1688: to hang sockets from remote.
1689: (patch included).</a>
1.294 david 1690: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1691: bog the machine excessively and cause problems.
1692: (patch included).</a>
1.294 david 1693: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1694: DDB interacted to possibly cause a crash.
1695: (patch included).</a>
1.294 david 1696: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1697: (patch included).</a>
1.294 david 1698: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1699: problem in bootpd(8). (patch included).</a>
1.294 david 1700: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1701: exploitable problem relating to environment variables in termcap
1702: and curses. (patch included).</a>
1.294 david 1703: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1704: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1705: </ul>
1706:
1.106 deraadt 1707: <p>
1708: <li>
1.288 matthieu 1709: <a name="23"></a>
1.235 miod 1710:
1.294 david 1711: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1712: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1713: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1714: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1715:
1.96 deraadt 1716: <p>
1.53 matthieu 1717: <ul>
1.294 david 1718: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1719: problem in bootpd(8). (patch included).</a>
1.294 david 1720: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1721: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1722: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1723: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1724: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1725: chpass(1) has a file descriptor leak which allows an
1726: attacker to modify /etc/master.passwd.</a>
1.294 david 1727: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1728: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1729: should not be executed with fd slots 0, 1, or 2 free.
1730: (patch included).</a>
1.294 david 1731: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1732: libraries (patches included).</a>
1.294 david 1733: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1734: processes too permissive (4th revision patch included).</a>
1.294 david 1735: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1736: of immutable and append-only file flags. (patch included).</a>
1.294 david 1737: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1738: if IPSEC is enabled (patch included).</a>
1.294 david 1739: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1740: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1741: </ul>
1.9 deraadt 1742:
1.106 deraadt 1743: <p>
1744: <li>
1.288 matthieu 1745: <a name="22"></a>
1.235 miod 1746:
1.294 david 1747: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1748: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1749: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1750: still exist in other operating systems. (The supplied patches are for
1751: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1752:
1.96 deraadt 1753: <p>
1.9 deraadt 1754: <ul>
1.294 david 1755: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1756: packets if IPSEC is enabled (patch included).</a>
1.294 david 1757: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1758: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1759: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1760: (patch included).</a>
1.294 david 1761: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1762: (patch included).</a>
1.294 david 1763: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1764: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1765: (patch included).</a>
1.294 david 1766: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1767: export (patch included).</a>
1.112 philen 1768: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1769: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1770: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1771: Acceptance.</a>
1.294 david 1772: A patch is available <a href="errata22.html#sourceroute">here</a>.
1773: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1774: flaw (patch included).</a>
1.294 david 1775: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1776: </ul>
1777:
1.106 deraadt 1778: <p>
1779: <li>
1.288 matthieu 1780: <a name="21"></a>
1.235 miod 1781:
1.294 david 1782: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1783: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1784: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1785: exist in other operating systems. (If you are running OpenBSD 2.1, we
1786: would strongly recommend an upgrade to the newest release, as this
1787: patch list only attempts at fixing the most important security
1788: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1789: security problems. Many of those problems were solved in ways which
1790: make it hard for us to provide patches).
1791:
1.96 deraadt 1792: <p>
1.52 deraadt 1793: <ul>
1.112 philen 1794: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1795: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1796: (patch included)</a>
1.112 philen 1797: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1798: </ul>
1.51 deraadt 1799:
1.106 deraadt 1800: <p>
1801: <li>
1.288 matthieu 1802: <a name="20"></a>
1.235 miod 1803:
1.294 david 1804: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1805: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1806: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1807: exist in other operating systems. (If you are running OpenBSD 2.0, we
1808: commend you for being there back in the old days!, but you're really
1809: missing out if you don't install a new version!)
1810:
1811: <p>
1812: <ul>
1.112 philen 1813: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1814: resolver (patch included)</a>
1815: <li>Many others... if people can hunt them down, please let me know
1816: and we'll put them up here.
1817: </ul>
1.51 deraadt 1818: <p>
1.106 deraadt 1819:
1.288 matthieu 1820: <a name="watching"></a>
1.294 david 1821: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1822:
1.21 deraadt 1823: Since we take a proactive stance with security, we are continually
1824: finding and fixing new security problems. Not all of these problems
1.80 espie 1825: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1826: confirmed to be exploitable; many simple bugs we fix do turn out to
1827: have security consequences we could not predict. We do not have the
1828: time resources to make these changes available in the above format.<p>
1.21 deraadt 1829:
1830: Thus there are usually minor security fixes in the current source code
1831: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1832: guarantee that these problems are of minimal impact and unproven
1.44 ian 1833: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1834: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1835:
1.45 deraadt 1836: People who are really concerned with security can do a number of
1837: things:<p>
1.21 deraadt 1838:
1839: <ul>
1840: <li>If you understand security issues, watch our
1.294 david 1841: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1842: eye out for things which appear security related. Since
1.21 deraadt 1843: exploitability is not proven for many of the fixes we make,
1844: do not expect the relevant commit message to say "SECURITY FIX!".
1845: If a problem is proven and serious, a patch will be available
1846: here very shortly after.
1.161 horacio 1847: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1848: security-announce mailing list</a> which will notify you for every
1.186 ian 1849: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1850: and instruct you on how to patch the problem.
1.21 deraadt 1851: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1852: complete system build from time to time (read /usr/src/Makefile
1853: carefully). Users can make the assumption that the current
1854: source tree always has stronger security than the previous release.
1.45 deraadt 1855: However, building your own system from source code is not trivial;
1.397 deraadt 1856: it is nearly 850MB of source code, and problems do occur as we
1.45 deraadt 1857: transition between major releases.
1.115 ericj 1858: <li>Install a binary snapshot for your
1.80 espie 1859: architecture, which are made available fairly often. For
1.29 deraadt 1860: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1861: </ul>
1862:
1.9 deraadt 1863: <p>
1.288 matthieu 1864: <a name="reporting"></a>
1.294 david 1865: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1866:
1.5 deraadt 1867: <p> If you find a new security problem, you can mail it to
1.294 david 1868: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1869: <br>
1.5 deraadt 1870: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1871: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1872:
1.107 deraadt 1873: <p>
1.288 matthieu 1874: <a name="papers"></a>
1.294 david 1875: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1876:
1.389 lum 1877: Numerous
1.404 ! deraadt 1878: <a href="papers/index.html">papers</a> have been written by OpenBSD team members,
1.389 lum 1879: many dedicated to security.
1.294 david 1880: </ul>
1.1 deraadt 1881:
1.24 deraadt 1882: </body>
1883: </html>
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