Annotation of www/security.html, Revision 1.330
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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>,
1.280 david 56: <a href="#34">3.4</a>,
1.301 miod 57: <a href="#35">3.5</a>,
1.312 david 58: <a href="#36">3.6</a>,
1.318 deraadt 59: <a href="#37">3.7</a>,
1.321 brad 60: <a href="#38">3.8</a>,
61: <a href="#39">3.9</a>.
1.114 philen 62: </td>
63: </tr>
64: </table>
1.56 deraadt 65: <hr>
66:
1.294 david 67: <a name="goals"></a>
1.278 deraadt 68: <ul>
1.294 david 69: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 70:
1.14 deraadt 71: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 72: ONE in the industry for security (if we are not already there). Our
73: open software development model permits us to take a more
74: uncompromising view towards increased security than Sun, SGI, IBM, HP,
75: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 76: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 77: cryptography</a>, we are able to take cryptographic approaches towards
78: fixing security problems.<p>
1.18 deraadt 79:
1.288 matthieu 80: <a name="disclosure"></a>
1.294 david 81: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 82:
1.45 deraadt 83: Like many readers of the
1.196 jufi 84: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 85: BUGTRAQ mailing list</a>,
1.106 deraadt 86: we believe in full disclosure of security problems. In the
87: operating system arena, we were probably the first to embrace
88: the concept. Many vendors, even of free software, still try
89: to hide issues from their users.<p>
90:
91: Security information moves very fast in cracker circles. On the other
92: hand, our experience is that coding and releasing of proper security
93: fixes typically requires about an hour of work -- very fast fix
94: turnaround is possible. Thus we think that full disclosure helps the
95: people who really care about security.<p>
96:
1.288 matthieu 97: <a name="process"></a>
1.294 david 98: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 99:
1.12 deraadt 100: Our security auditing team typically has between six and twelve
1.45 deraadt 101: members who continue to search for and fix new security holes. We
102: have been auditing since the summer of 1996. The process we follow to
103: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 104: every critical software component. We are not so much looking for
105: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 106: years later someone discovers the problem used to be a security
1.106 deraadt 107: issue, and we fixed it because it was just a bug, well, all the
108: better. Flaws have been found in just about every area of the system.
109: Entire new classes of security problems have been found during our
110: audit, and often source code which had been audited earlier needs
111: re-auditing with these new flaws in mind. Code often gets audited
112: multiple times, and by multiple people with different auditing
113: skills.<p>
1.12 deraadt 114:
1.94 deraadt 115: Some members of our security auditing team worked for Secure Networks,
116: the company that made the industry's premier network security scanning
117: software package Ballista (Secure Networks got purchased by Network
118: Associates, Ballista got renamed to Cybercop Scanner, and well...)
119: That company did a lot of security research, and thus fit in well
1.106 deraadt 120: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
121: colours since day 1.<p>
1.31 deraadt 122:
1.34 deraadt 123: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 124: In most cases we have found that the determination of exploitability
125: is not an issue. During our ongoing auditing process we find many
126: bugs, and endeavor to fix them even though exploitability is not
127: proven. We fix the bug, and we move on to find other bugs to fix. We
128: have fixed many simple and obvious careless programming errors in code
129: and only months later discovered that the problems were in fact
130: exploitable. (Or, more likely someone on
1.197 jufi 131: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 132: would report that other operating systems were vulnerable to a `newly
133: discovered problem', and then it would be discovered that OpenBSD had
134: been fixed in a previous release). In other cases we have been saved
135: from full exploitability of complex step-by-step attacks because we
136: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 137: managed such a success is the lpd advisory that Secure Networks put out.
138: <p>
1.29 deraadt 139:
1.288 matthieu 140: <a name="newtech"></a>
1.294 david 141: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 142:
143: As we audit source code, we often invent new ways of solving problems.
144: Sometimes these ideas have been used before in some random application
145: written somewhere, but perhaps not taken to the degree that we do.
146: <p>
147:
148: <ul>
149: <li>strlcpy() and strlcat()
150: <li>Memory protection purify
151: <ul>
152: <li>W^X
153: <li>.rodata segment
154: <li>Guard pages
155: <li>Randomized malloc()
156: <li>Randomized mmap()
157: <li>atexit() and stdio protection
158: </ul>
1.295 otto 159: <li>Privilege separation
1.278 deraadt 160: <li>Privilege revocation
161: <li>Chroot jailing
162: <li>New uids
163: <li>ProPolice
164: <li>... and others
165: </ul>
166: <p>
167:
1.294 david 168: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 169:
1.45 deraadt 170: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 171: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 172: commonplace in security forums like
1.197 jufi 173: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 174:
1.45 deraadt 175: The most intense part of our security auditing happened immediately
1.80 espie 176: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 177: over the last third of 1996 and first half of 1997. Thousands (yes,
178: thousands) of security issues were fixed rapidly over this year-long
179: period; bugs like the standard buffer overflows, protocol
180: implementation weaknesses, information gathering, and filesystem
181: races. Hence most of the security problems that we encountered were
182: fixed before our 2.1 release, and then a far smaller number needed
183: fixing for our 2.2 release. We do not find as many problems anymore,
184: it is simply a case of diminishing returns. Recently the security
185: problems we find and fix tend to be significantly more obscure or
186: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 187:
1.35 deraadt 188: <ul>
1.45 deraadt 189: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 190: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 191: to search for more complicated exploits, so we will too.
192: <li>Finding and fixing subtle flaws in complicated software is
193: a lot of fun.
1.35 deraadt 194: </ul>
1.106 deraadt 195: <p>
1.15 deraadt 196:
1.14 deraadt 197: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 198: to find and fix new security flaws.<p>
1.12 deraadt 199:
1.288 matthieu 200: <a name="default"></a>
1.294 david 201: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 202:
203: To ensure that novice users of OpenBSD do not need to become security
204: experts overnight (a viewpoint which other vendors seem to have), we
205: ship the operating system in a Secure by Default mode. All non-essential
206: services are disabled. As the user/administrator becomes more familiar
207: with the system, he will discover that he has to enable daemons and other
208: parts of the system. During the process of learning how to enable a new
209: service, the novice is more likely to learn of security considerations.<p>
210:
211: This is in stark contrast to the increasing number of systems that
212: ship with NFS, mountd, web servers, and various other services enabled
213: by default, creating instantaneous security problems for their users
214: within minutes after their first install.<p>
215:
1.288 matthieu 216: <a name="crypto"></a>
1.294 david 217: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 218:
219: And of course, since the OpenBSD project is based in Canada, it is possible
220: for us to integrate cryptography. For more information, read the page
1.116 deraadt 221: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 222:
1.294 david 223: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 224:
225: <li>
1.321 brad 226: <a name="39"></a>
227:
228: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
229: These are the OpenBSD 3.9 advisories -- all these problems are solved
230: in <a href=anoncvs.html>OpenBSD current</a> and the
231: <a href=stable.html>patch branch</a>.
232:
233: <p>
234: <ul>
1.330 ! brad 235: <li><a href="errata.html#systrace">Oct 7, 2006:
! 236: Fix for an integer overflow in systrace's STRIOCREPLACE support,
! 237: found by Chris Evans.</a>
! 238: <li><a href="errata.html#openssl2">Oct 7, 2006:
! 239: Several problems have been found in OpenSSL.</a>
! 240: <li><a href="errata.html#httpd2">Oct 7, 2006:
! 241: httpd(8) does not sanitize the Expect header from an HTTP request
! 242: when it is reflected back in an error message, which might allow
! 243: cross-site scripting (XSS) style attacks.</a>
1.329 brad 244: <li><a href="errata.html#openssl">Sep 8, 2006:
245: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
246: possible for an attacker to construct an invalid signature which
247: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 248: <li><a href="errata.html#bind">Sep 8, 2006:
249: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 250: <li><a href="errata.html#sppp">Sep 2, 2006:
251: Due to the failure to correctly validate LCP configuration option
252: lengths, it is possible for an attacker to send LCP packets via an
253: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 254: <li><a href="errata.html#isakmpd">Aug 25, 2006:
255: A problem in isakmpd(8) caused IPsec to run partly without replay
256: protection.</a>
257: <li><a href="errata.html#sem">Aug 25, 2006:
258: It is possible to cause the kernel to panic when more than the default
259: number of sempahores have been allocated.</a>
260: <li><a href="errata.html#dhcpd">Aug 25, 2006:
261: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
262: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
263: option.</a>
264: <li><a href="errata.html#sendmail3">Aug 25, 2006:
265: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 266: <li><a href="errata.html#httpd">Jul 30, 2006:
267: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
268: overflow.</a>
1.324 brad 269: <li><a href="errata.html#sendmail2">Jun 15, 2006:
270: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 271: <li><a href="errata.html#xorg">May 2, 2006:
272: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 273: <li><a href="errata.html#sendmail">Mar 25, 2006:
274: A race condition has been reported to exist in the handling by sendmail
275: of asynchronous signals.</a>
276: </ul>
277:
278: <li>
1.318 deraadt 279: <a name="38"></a>
280:
281: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
282: These are the OpenBSD 3.8 advisories -- all these problems are solved
283: in <a href=anoncvs.html>OpenBSD current</a> and the
284: <a href=stable.html>patch branch</a>.
285:
286: <p>
287: <ul>
1.330 ! brad 288: <li><a href="errata38.html#systrace">Oct 7, 2006:
! 289: Fix for an integer overflow in systrace's STRIOCREPLACE support,
! 290: found by Chris Evans.</a>
! 291: <li><a href="errata38.html#openssl2">Oct 7, 2006:
! 292: Several problems have been found in OpenSSL.</a>
! 293: <li><a href="errata38.html#httpd2">Oct 7, 2006:
! 294: httpd(8) does not sanitize the Expect header from an HTTP request
! 295: when it is reflected back in an error message, which might allow
! 296: cross-site scripting (XSS) style attacks.</a>
1.329 brad 297: <li><a href="errata38.html#openssl">Sep 8, 2006:
298: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
299: possible for an attacker to construct an invalid signature which
300: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 301: <li><a href="errata38.html#bind">Sep 8, 2006:
302: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 303: <li><a href="errata38.html#sppp">Sep 2, 2006:
304: Due to the failure to correctly validate LCP configuration option
305: lengths, it is possible for an attacker to send LCP packets via an
306: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 307: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
308: A problem in isakmpd(8) caused IPsec to run partly without replay
309: protection.</a>
310: <li><a href="errata38.html#sem">Aug 25, 2006:
311: It is possible to cause the kernel to panic when more than the default
312: number of sempahores have been allocated.</a>
313: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
314: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
315: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
316: option.</a>
317: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
318: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 319: <li><a href="errata38.html#httpd">Jul 30, 2006:
320: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
321: overflow.</a>
1.324 brad 322: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
323: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 324: <li><a href="errata38.html#xorg">May 2, 2006:
325: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 326: <li><a href="errata38.html#sendmail">Mar 25, 2006:
327: A race condition has been reported to exist in the handling by sendmail
328: of asynchronous signals.</a>
329: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 330: Josh Bressers has reported a weakness in OpenSSH caused due to the
331: insecure use of the system(3) function in scp(1) when performing copy
332: operations using filenames that are supplied by the user from the
333: command line.</a>
1.321 brad 334: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 335: Do not allow users to trick suid programs into re-opening files via
336: /dev/fd.</a>
1.321 brad 337: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 338: A buffer overflow has been found in the Perl interpreter with the
339: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 340: </ul>
341:
1.323 steven 342: <p>
343: OpenBSD 3.7 and earlier releases are not supported anymore. The following
344: paragraphs only list advisories issued while they were maintained; these
345: releases are likely to be affected by the advisories for more recent releases.
346: <br>
347:
1.318 deraadt 348: <li>
1.312 david 349: <a name="37"></a>
350:
351: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
352: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 353: in <a href="anoncvs.html">OpenBSD current</a>. The
354: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
355: you should update your machine.
1.312 david 356:
357: <p>
358: <ul>
1.322 brad 359: <li><a href="errata37.html#xorg">May 2, 2006:
360: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 361: <li><a href="errata37.html#sendmail">Mar 25, 2006:
362: A race condition has been reported to exist in the handling by sendmail
363: of asynchronous signals.</a>
1.320 brad 364: <li><a href="errata37.html#ssh">Feb 12, 2006:
365: Josh Bressers has reported a weakness in OpenSSH caused due to the
366: insecure use of the system(3) function in scp(1) when performing copy
367: operations using filenames that are supplied by the user from the
368: command line.</a>
1.319 brad 369: <li><a href="errata37.html#fd">Jan 5, 2006:
370: Do not allow users to trick suid programs into re-opening files via
371: /dev/fd.</a>
372: <li><a href="errata37.html#perl">Jan 5, 2006:
373: A buffer overflow has been found in the Perl interpreter with the
374: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 375: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 376: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 377: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 378: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 379: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 380: Fix a race condition in sudo(8) that could allow a user
1.315 millert 381: to run arbitrary commands.</a>
1.318 deraadt 382: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 383: Fix a buffer overflow, memory leaks, and NULL pointer
384: dereference in cvs(1).</a>
1.312 david 385: </ul>
386:
387: <li>
1.301 miod 388: <a name="36"></a>
389:
390: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
391: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 392: in <a href="anoncvs.html">OpenBSD current</a>. The
393: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
394: you should update your machine.
1.301 miod 395:
396: <p>
1.302 markus 397: <ul>
1.317 millert 398: <li><a href="errata36.html#libz2">Jul 21, 2005:
399: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 400: <li><a href="errata36.html#libz">Jul 6, 2005:
401: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 402: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 403: Fix a race condition in sudo(8) that could allow a user
1.315 millert 404: to run arbitrary commands.</a>
1.311 deraadt 405: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 406: Fix a buffer overflow, memory leaks, and NULL pointer
407: dereference in cvs(1).</a>
1.311 deraadt 408: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 409: Due to buffer overflows in telnet(1), a malicious
410: server or man-in-the-middle attack could allow
411: execution of arbitrary code with the privileges of
412: the user invoking telnet(1).</a>
1.311 deraadt 413: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 414: More stringent checking should be done in the copy(9)
415: functions to prevent their misuse.</a>
1.311 deraadt 416: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 417: More stringent checking should be done in the copy(9)
418: functions to prevent their misuse.</a>
1.311 deraadt 419: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 420: httpd(8)'s mod_include module fails to properly validate
421: the length of user supplied tag strings prior to copying
1.305 brad 422: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 423: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 424: On systems running isakmpd(8) it is possible for a local
425: user to cause kernel memory corruption and system panic by
1.303 markus 426: setting ipsec(4) credentials on a socket.</a>
1.302 markus 427: </ul>
1.301 miod 428:
429: <li>
1.288 matthieu 430: <a name="35"></a>
1.279 deraadt 431:
1.294 david 432: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 433: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 434: in <a href="anoncvs.html">OpenBSD current</a>. The
435: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
436: you should update your machine.
1.279 deraadt 437:
438: <p>
439: <ul>
1.310 brad 440: <li><a href="errata35.html#cvs4">Apr 28, 2005:
441: Fix a buffer overflow, memory leaks, and NULL pointer
442: dereference in cvs(1).</a>
1.309 brad 443: <li><a href="errata35.html#telnet">Mar 30, 2005:
444: Due to buffer overflows in telnet(1), a malicious
445: server or man-in-the-middle attack could allow
446: execution of arbitrary code with the privileges of
447: the user invoking telnet(1).</a>
1.308 brad 448: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 449: More stringent checking should be done in the copy(9)
450: functions to prevent their misuse.</a>
1.306 brad 451: <li><a href="errata35.html#locore">Feb 28, 2005:
452: More stringent checking should be done in the copy(9)
453: functions to prevent their misuse.</a>
1.304 brad 454: <li><a href="errata35.html#httpd3">Jan 12, 2005:
455: httpd(8)'s mod_include module fails to properly validate
456: the length of user supplied tag strings prior to copying
1.305 brad 457: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 458: <li><a href="errata35.html#pfkey">Dec 14, 2004:
459: On systems running isakmpd(8) it is possible for a local
460: user to cause kernel memory corruption and system panic by
1.303 markus 461: setting ipsec(4) credentials on a socket.</a>
1.301 miod 462: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 463: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 464: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 465: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 466: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 467: httpd(8)'s mod_rewrite module can be made to write one zero byte in
468: an arbitrary memory position outside of a char array, causing a DoS
469: or possibly buffer overflows.</a>
1.301 miod 470: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 471: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 472: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 473: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 474: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 475: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 476: Multiple remote vulnerabilities have been found in the cvs(1)
477: server which can be used by CVS clients to crash or execute
1.293 brad 478: arbitrary code on the server.</a>
1.301 miod 479: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 480: kdc(8) performs inadequate checking of request fields, leading
481: to the possibility of principal impersonation from other
482: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 483: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 484: xdm(1) ignores the requestPort resource and creates a
1.293 brad 485: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 486: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 487: A buffer overflow in the cvs(1) server has been found,
488: which can be used by CVS clients to execute arbitrary code on
1.293 brad 489: the server.</a>
1.301 miod 490: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 491: Integer overflow problems were found in procfs, allowing
1.293 brad 492: reading of arbitrary kernel memory.</a>
1.301 miod 493: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 494: Pathname validation problems have been found in cvs(1),
495: allowing clients and servers access to files outside the
1.293 brad 496: repository or local CVS tree.</a>
1.279 deraadt 497: </ul>
498:
499: <p>
500: <li>
1.288 matthieu 501: <a name="34"></a>
1.261 david 502:
1.294 david 503: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 504: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 505: in <a href="anoncvs.html">OpenBSD current</a>. The
506: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
507: you should update your machine.
1.261 david 508: <p>
509: <ul>
1.302 markus 510: <li><a href="errata34.html#pfkey">Dec 14, 2004:
511: On systems running isakmpd(8) it is possible for a local
512: user to cause kernel memory corruption and system panic by
1.303 markus 513: setting ipsec(4) credentials on a socket.</a>
1.298 brad 514: <li><a href="errata34.html#xpm">Sep 16, 2004:
515: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 516: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
517: httpd(8)'s mod_rewrite module can be made to write one zero byte in
518: an arbitrary memory position outside of a char array, causing a DoS
519: or possibly buffer overflows.</a>
1.294 david 520: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 521: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 522: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 523: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 524: an attacker can delete IPsec tunnels at will.</a>
1.294 david 525: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 526: Multiple remote vulnerabilities have been found in the cvs(1)
527: server which can be used by CVS clients to crash or execute
1.293 brad 528: arbitrary code on the server.</a>
1.294 david 529: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 530: kdc(8) performs inadequate checking of request fields, leading
531: to the possibility of principal impersonation from other
532: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 533: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 534: A buffer overflow in the cvs(1) server has been found,
535: which can be used by CVS clients to execute arbitrary code on
536: the server.</a>
1.294 david 537: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 538: Integer overflow problems were found in procfs, allowing
539: reading of arbitrary kernel memory.</a>
1.294 david 540: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 541: Pathname validation problems have been found in cvs(1),
542: allowing clients and servers access to files outside the
543: repository or local CVS tree.</a>
1.294 david 544: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 545: A missing check for a NULL-pointer dereference may allow a
1.281 otto 546: remote attacker to crash applications using OpenSSL.</a>
1.294 david 547: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 548: Defects in the payload validation and processing functions of
549: isakmpd have been discovered. An attacker could send malformed
550: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 551: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 552: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
553: access module, using IP addresses without a netmask on big endian
554: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 555: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 556: An IPv6 MTU handling problem exists that could be used by an
557: attacker to cause a denial of service attack.</a>
1.294 david 558: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 559: A reference counting bug in shmat(2) could be used to write to
560: kernel memory under certain circumstances.</a>
1.294 david 561: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 562: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 563: by Thomas Walpuski.</a>
1.294 david 564: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 565: It may be possible for a local user to overrun the stack in
566: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 567: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 568: The use of certain ASN.1 encodings or malformed public keys may
569: allow an attacker to mount a denial of service attack against
570: applications linked with ssl(3).</a>
1.261 david 571: </ul>
572:
573: <li>
1.288 matthieu 574: <a name="33"></a>
1.246 deraadt 575:
1.294 david 576: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 577: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 578: in <a href="anoncvs.html">OpenBSD current</a>. The
579: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 580: you should update your machine.
1.246 deraadt 581: <p>
582: <ul>
1.294 david 583: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 584: Pathname validation problems have been found in cvs(1),
585: allowing clients and servers access to files outside the
586: repository or local CVS tree.</a>
1.294 david 587: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 588: A missing check for a NULL-pointer dereference may allow a
1.281 otto 589: remote attacker to crash applications using OpenSSL.</a>
1.294 david 590: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 591: Defects in the payload validation and processing functions of
592: isakmpd have been discovered. An attacker could send malformed
593: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 594: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 595: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
596: access module, using IP addresses without a netmask on big endian
597: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 598: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 599: An IPv6 MTU handling problem exists that could be used by an
600: attacker to cause a denial of service attack.</a>
1.294 david 601: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 602: A reference counting bug in shmat(2) could be used to write to
603: kernel memory under certain circumstances.</a>
1.294 david 604: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 605: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 606: by Thomas Walpuski.</a>
1.294 david 607: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 608: It may be possible for a local user to execute arbitrary code
609: resulting in escalation of privileges due to a stack overrun
610: in compat_ibcs2(8).</a>
1.294 david 611: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 612: The use of certain ASN.1 encodings or malformed public keys may
613: allow an attacker to mount a denial of service attack against
614: applications linked with ssl(3).</a>
1.294 david 615: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 616: Access of freed memory in pf(4) could be used to
1.260 margarid 617: remotely panic a machine using scrub rules.</a>
1.294 david 618: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 619: A buffer overflow in the address parsing in
620: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 621: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 622: OpenSSH versions prior to 3.7 contains a buffer management error
623: that is potentially exploitable.</a>
1.294 david 624: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 625: Root may be able to reduce the security level by taking advantage of
626: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 627: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 628: An improper bounds check in the kernel may allow a local user
629: to panic the kernel.</a>
1.294 david 630: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 631: An off-by-one error exists in the C library function realpath(3)
632: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 633: </ul>
634:
1.265 miod 635:
1.247 david 636: <p>
1.246 deraadt 637: <li>
1.288 matthieu 638: <a name="32"></a>
1.224 deraadt 639:
1.294 david 640: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 641: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 642: in <a href="anoncvs.html">OpenBSD current</a>. The
643: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 644: you should update your machine.
1.224 deraadt 645: <p>
646: <ul>
1.294 david 647: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 648: The use of certain ASN.1 encodings or malformed public keys may
649: allow an attacker to mount a denial of service attack against
650: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 651: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 652: Access of freed memory in pf(4) could be used to
1.260 margarid 653: remotely panic a machine using scrub rules.</a>
1.294 david 654: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 655: A buffer overflow in the address parsing in
656: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 657: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 658: OpenSSH versions prior to 3.7 contains a buffer management error
659: that is potentially exploitable.</a>
1.294 david 660: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 661: Fix for a potential security issue in
662: sendmail(8) with respect to DNS maps.</a>
1.294 david 663: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 664: An off-by-one error exists in the C library function realpath(3)
665: may allow an attacker to gain escalated privileges.</a>
1.294 david 666: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 667: A buffer overflow in the address parsing in
668: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 669: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 670: A cryptographic weaknesses in the Kerberos v4 protocol can be
671: exploited on Kerberos v5 as well.</a>
1.294 david 672: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 673: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 674: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 675: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 676: Various SSL and TLS operations in OpenSSL are vulnerable to
677: timing attacks.</a>
1.294 david 678: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 679: A buffer overflow in lprm(1) may allow an attacker to elevate
680: privileges to user daemon.</a>.
1.294 david 681: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 682: A buffer overflow in the envelope comments processing in
683: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 684: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 685: httpd(8) leaks file inode numbers via ETag header as well as
686: child PIDs in multipart MIME boundary generation. This could
687: lead, for example, to NFS exploitation because it uses inode
688: numbers as part of the file handle.</a>
1.294 david 689: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 690: In ssl(8) an information leak can occur via timing by performing
691: a MAC computation even if incorrect block cipher padding has
692: been found, this is a countermeasure. Also, check for negative
693: sizes, in allocation routines.</a>
1.294 david 694: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 695: A double free exists in cvs(1) that could lead to privilege
696: escalation for cvs configurations where the cvs command is
1.233 margarid 697: run as a privileged user.</a>
1.294 david 698: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 699: A buffer overflow exists in named(8) that could lead to a
700: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 701: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 702: A logic error in the pool kernel memory allocator could cause
703: memory corruption in low-memory situations, causing the system
704: to crash.</a>
1.294 david 705: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 706: An attacker can bypass smrsh(8)'s restrictions and execute
707: arbitrary commands with the privileges of his own account.</a>
1.294 david 708: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 709: Network bridges running pf with scrubbing enabled could cause
710: mbuf corruption, causing the system to crash.</a>
1.294 david 711: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 712: A buffer overflow can occur in the kadmind(8) daemon, leading
713: to possible remote crash or exploit.</a>
1.224 deraadt 714: </ul>
715:
1.227 miod 716: <p>
717: <li>
1.288 matthieu 718: <a name="31"></a>
1.203 deraadt 719:
1.294 david 720: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 721: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 722: in <a href="anoncvs.html">OpenBSD current</a>. The
723: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 724: you should update your machine.
1.203 deraadt 725:
726: <p>
727: <ul>
1.294 david 728: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 729: A buffer overflow in the address parsing in
730: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 731: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 732: A cryptographic weaknesses in the Kerberos v4 protocol can be
733: exploited on Kerberos v5 as well.</a>
1.294 david 734: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 735: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 736: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 737: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 738: Various SSL and TLS operations in OpenSSL are vulnerable to
739: timing attacks.</a>
1.294 david 740: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 741: A buffer overflow in lprm(1) may allow an attacker to gain
742: root privileges.</a>
1.294 david 743: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 744: A buffer overflow in the envelope comments processing in
745: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 746: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 747: In ssl(8) an information leak can occur via timing by performing
748: a MAC computation even if incorrect block cipher padding has
749: been found, this is a countermeasure. Also, check for negative
750: sizes, in allocation routines.</a>
1.294 david 751: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 752: A double free exists in cvs(1) that could lead to privilege
753: escalation for cvs configurations where the cvs command is
1.294 david 754: run as a privileged user</a>.
755: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 756: A buffer overflow exists in named(8) that could lead to a
757: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 758: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 759: Incorrect argument checking in the getitimer(2) system call
760: may allow an attacker to crash the system.</a>
1.294 david 761: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 762: An attacker can bypass smrsh(8)'s restrictions and execute
763: arbitrary commands with the privileges of his own account.</a>
1.294 david 764: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 765: A buffer overflow can occur in the kadmind(8) daemon, leading
766: to possible remote crash or exploit.</a>
1.294 david 767: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 768: Incorrect argument checking in the setitimer(2) system call
769: may allow an attacker to write to kernel memory.</a>
1.294 david 770: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 771: An insufficient boundary check in the select system call
1.220 miod 772: allows an attacker to overwrite kernel memory and execute arbitrary code
773: in kernel context.</a>
1.294 david 774: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 775: Several remote buffer overflows can occur in the SSL2 server and SSL3
776: client of the ssl(8) library, as in the ASN.1 parser code in the
777: crypto(3) library, all of them being potentially remotely
778: exploitable.</a>
1.294 david 779: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 780: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
781: possible remote crash.</a>
1.294 david 782: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 783: A race condition exists in the pppd(8) daemon which may cause it to
784: alter the file permissions of an arbitrary file.</a>
1.294 david 785: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 786: Receiving IKE payloads out of sequence can cause isakmpd(8) to
787: crash.</a>
1.294 david 788: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 789: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 790: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 791: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 792: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 793: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 794: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 795: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 796: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 797: input validation error that can result in an integer overflow and
798: privilege escalation.</a>
1.294 david 799: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 800: A buffer overflow can occur during the interpretation of chunked
801: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 802: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 803: Under certain conditions, on systems using YP with netgroups
804: in the password database, it is possible that sshd(8) does
805: ACL checks for the requested user name but uses the password
806: database entry of a different user for authentication. This
807: means that denied users might authenticate successfully
808: while permitted users could be locked out.</a>
1.294 david 809: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 810: A race condition exists that could defeat the kernel's
811: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 812: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 813: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 814: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 815: A local user can gain super-user privileges due to a buffer
816: overflow in sshd(8) if AFS has been configured on the system
817: or if KerberosTgtPassing or AFSTokenPassing has been enabled
818: in the sshd_config file.</a>
1.203 deraadt 819: </ul>
820:
1.235 miod 821: <p>
1.203 deraadt 822: <li>
1.288 matthieu 823: <a name="30"></a>
1.187 deraadt 824:
1.294 david 825: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 826: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 827: in <a href="anoncvs.html">OpenBSD current</a>. The
828: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 829: you should update your machine.
1.187 deraadt 830:
831: <p>
832: <ul>
1.294 david 833: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 834: A buffer overflow exists in named(8) that could lead to a
835: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 836: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 837: Incorrect argument checking in the getitimer(2) system call
838: may allow an attacker to crash the system.</a>
1.294 david 839: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 840: An attacker can bypass smrsh(8)'s restrictions and execute
841: arbitrary commands with the privileges of his own account.</a>
1.294 david 842: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 843: A buffer overflow can occur in the kadmind(8) daemon, leading
844: to possible remote crash or exploit.</a>
1.294 david 845: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 846: Incorrect argument checking in the setitimer(2) system call
847: may allow an attacker to write to kernel memory.</a>
1.294 david 848: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 849: An insufficient boundary check in the select and poll system calls
850: allows an attacker to overwrite kernel memory and execute arbitrary code
851: in kernel context.</a>
1.294 david 852: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 853: Several remote buffer overflows can occur in the SSL2 server and SSL3
854: client of the ssl(8) library, as in the ASN.1 parser code in the
855: crypto(3) library, all of them being potentially remotely
856: exploitable.</a>
1.294 david 857: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 858: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
859: possible remote crash.</a>
1.294 david 860: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 861: A race condition exists in the pppd(8) daemon which may cause it to
862: alter the file permissions of an arbitrary file.</a>
1.294 david 863: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 864: Receiving IKE payloads out of sequence can cause isakmpd(8) to
865: crash.</a>
1.294 david 866: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 867: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 868: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 869: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 870: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 871: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 872: input validation error that can result in an integer overflow and
873: privilege escalation.</a>
1.294 david 874: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 875: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 876: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 877: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 878: A buffer overflow can occur during the interpretation of chunked
879: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 880: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 881: A race condition exists that could defeat the kernel's
882: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 883: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 884: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 885: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 886: A local user can gain super-user privileges due to a buffer
887: overflow in sshd(8) if AFS has been configured on the system
888: or if KerberosTgtPassing or AFSTokenPassing has been enabled
889: in the sshd_config file.</a>
1.294 david 890: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 891: The mail(1) was interpreting tilde escapes even when invoked
892: in non-interactive mode. As mail(1) is called as root from cron,
893: this can lead to a local root compromise.</a>
1.294 david 894: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 895: Under certain conditions, on systems using YP with netgroups in
896: the password database, it is possible for the rexecd(8) and rshd(8)
897: daemons to execute a shell from a password database entry for a
898: different user. Similarly, atrun(8) may change to the wrong
899: home directory when running jobs.</a>
1.294 david 900: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 901: A potential double free() exists in the zlib library;
902: this is not exploitable on OpenBSD.
903: The kernel also contains a copy of zlib; it is not
904: currently known if the kernel zlib is exploitable.</a>
1.294 david 905: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 906: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 907: may allow a local user to gain super-user privileges.</a>
1.294 david 908: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 909: A race condition between the ptrace(2) and execve(2) system calls
910: allows an attacker to modify the memory contents of suid/sgid
911: processes which could lead to compromise of the super-user account.</a>
1.294 david 912: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 913: There is a security hole in sudo(8) that can be exploited
914: when the Postfix sendmail replacement is installed that may
915: allow an attacker on the local host to gain root privileges.</a>
1.294 david 916: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 917: An attacker can trick a machine running the lpd daemon into
918: creating new files in the root directory from a machine with
919: remote line printer access.</a>
1.294 david 920: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 921: The vi.recover script can be abused in such a way as
922: to cause arbitrary zero-length files to be removed.</a>
1.294 david 923: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 924: pf(4) was incapable of dealing with certain ipv6 icmp packets,
925: resulting in a crash.</a>
1.294 david 926: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 927: A security hole that may allow an attacker to partially authenticate
928: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 929: </ul>
930:
931: <p>
932: <li>
1.288 matthieu 933: <a name="29"></a>
1.173 deraadt 934:
1.294 david 935: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 936: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 937: in <a href="anoncvs.html">OpenBSD current</a>. The
938: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 939: you should update your machine.
940:
1.173 deraadt 941:
942: <p>
943: <ul>
1.294 david 944: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 945: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 946: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 947: A race condition exists that could defeat the kernel's
948: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 949: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 950: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 951: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 952: A local user can gain super-user privileges due to a buffer
953: overflow in sshd(8) if AFS has been configured on the system
954: or if KerberosTgtPassing or AFSTokenPassing has been enabled
955: in the sshd_config file.</a>
1.294 david 956: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 957: The mail(1) was interpreting tilde escapes even when invoked
958: in non-interactive mode. As mail(1) is called as root from cron,
959: this can lead to a local root compromise.</a>
1.294 david 960: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 961: A potential double free() exists in the zlib library;
962: this is not exploitable on OpenBSD.
963: The kernel also contains a copy of zlib; it is not
964: currently known if the kernel zlib is exploitable.</a>
1.294 david 965: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 966: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 967: may allow a local user to gain super-user privileges.</a>
1.294 david 968: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 969: A race condition between the ptrace(2) and execve(2) system calls
970: allows an attacker to modify the memory contents of suid/sgid
971: processes which could lead to compromise of the super-user account.</a>
1.294 david 972: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 973: There is a security hole in sudo(8) that can be exploited
974: when the Postfix sendmail replacement is installed that may
975: allow an attacker on the local host to gain root privileges.</a>
1.294 david 976: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 977: An attacker can trick a machine running the lpd daemon into
978: creating new files in the root directory from a machine with
979: remote line printer access.</a>
1.294 david 980: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 981: The vi.recover script can be abused in such a way as
982: to cause arbitrary zero-length files to be removed.</a>
1.294 david 983: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 984: A security hole exists in uuxqt(8) that may allow an
985: attacker to gain root privileges.</a>
1.294 david 986: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 987: A security hole exists in lpd(8) that may allow an
988: attacker to gain root privileges if lpd is running.</a>
1.294 david 989: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 990: A security hole exists in sendmail(8) that may allow an
991: attacker on the local host to gain root privileges.</a>
1.294 david 992: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 993: A kernel buffer overflow in the NFS code can be used to execute
994: arbitrary code by users with mount privileges (only root by
1.181 millert 995: default).</a>
1.294 david 996: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 997: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 998: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 999: sshd(8) allows users to delete arbitrary files named "cookies"
1000: if X11 forwarding is enabled. X11 forwarding is disabled
1001: by default.</a>
1.294 david 1002: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1003: Programs using the fts routines can be tricked into changing
1004: into the wrong directory.</a>
1.294 david 1005: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1006: Sendmail signal handlers contain unsafe code,
1007: leading to numerous race conditions.</a>
1.173 deraadt 1008: </ul>
1009:
1010: <p>
1011: <li>
1.288 matthieu 1012: <a name="28"></a>
1.152 deraadt 1013:
1.294 david 1014: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1015: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1016: in <a href="anoncvs.html">OpenBSD current</a>. The
1017: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1018: you should update your machine.
1019:
1.152 deraadt 1020:
1021: <p>
1022: <ul>
1.294 david 1023: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1024: A security hole exists in uuxqt(8) that may allow an
1025: attacker to gain root privileges.</a>
1.294 david 1026: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1027: A security hole exists in lpd(8) that may allow an
1028: attacker to gain root privileges if lpd is running.</a>
1.294 david 1029: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1030: A security hole exists in sendmail(8) that may allow an
1031: attacker on the local host to gain root privileges.</a>
1.294 david 1032: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1033: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1034: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1035: Programs using the fts routines can be tricked into changing
1036: into the wrong directory.</a>
1.294 david 1037: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1038: Sendmail signal handlers contain unsafe code,
1039: leading to numerous race conditions.</a>
1.294 david 1040: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1041: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1042: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1043: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1044: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1045: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1046: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1047: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1048: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1049: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1050: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1051: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1052: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1053: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1054: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1055: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1056: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1057: rnd(4) did not use all of its input when written to.</a>
1.294 david 1058: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1059: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1060: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1061: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1062: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1063: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1064: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1065: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1066: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1067: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1068: </ul>
1069:
1070: <p>
1071: <li>
1.288 matthieu 1072: <a name="27"></a>
1.124 deraadt 1073:
1.294 david 1074: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1075: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1076: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1077: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1078:
1079: <p>
1080: <ul>
1.294 david 1081: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1082: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1083: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1084: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1085: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1086: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1087: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1088: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1089: (patch included)</a>
1.294 david 1090: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1091: X11 libraries have 2 potential overflows in xtrans code.
1092: (patch included)</a>
1.294 david 1093: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1094: Apache mod_rewrite and mod_vhost_alias modules could expose files
1095: on the server in certain configurations if used.
1096: (patch included)</a>
1.294 david 1097: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1098: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1099: TERMPATH and TERMCAP environment variables as it should.
1100: (patch included)</a>
1.294 david 1101: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1102: There are printf-style format string bugs in several privileged
1103: programs. (patch included)</a>
1.294 david 1104: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1105: libcurses honored terminal descriptions in the $HOME/.terminfo
1106: directory as well as in the TERMCAP environment variable for
1107: setuid and setgid applications.
1.146 deraadt 1108: (patch included)</a>
1.294 david 1109: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1110: A format string vulnerability exists in talkd(8).
1111: (patch included)</a>
1.294 david 1112: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1113: A format string vulnerability exists in the pw_error() function of the
1114: libutil library, yielding localhost root through chpass(1).
1115: (patch included)</a>
1.294 david 1116: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1117: Bad ESP/AH packets could cause a crash under certain conditions.
1118: (patch included)</a>
1.294 david 1119: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1120: A format string vulnerability (localhost root) exists in xlock(1).
1121: (patch included)</a>
1.294 david 1122: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1123: Various bugs found in X11 libraries have various side effects, almost
1124: completely denial of service in OpenBSD.
1125: (patch included)</a>
1.294 david 1126: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1127: Just like pretty much all the other unix ftp daemons
1128: on the planet, ftpd had a remote root hole in it.
1129: Luckily, ftpd was not enabled by default.
1.137 deraadt 1130: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1131: (patch included)</a>
1.294 david 1132: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1133: Mopd, very rarely used, contained some buffer overflows.
1134: (patch included)</a>
1.294 david 1135: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1136: libedit would check for a <b>.editrc</b> file in the current
1137: directory. Not known to be a real security issue, but a patch
1138: is available anyways.
1139: (patch included)</a>
1.294 david 1140: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1141: A serious bug in dhclient(8) could allow strings from a
1142: malicious dhcp server to be executed in the shell as root.
1143: (patch included)</a>
1.294 david 1144: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1145: A serious bug in isakmpd(8) policy handling wherein
1146: policy verification could be completely bypassed in isakmpd.
1147: (patch included)</a>
1.294 david 1148: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1149: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1150: should not be used, and results in security problems on
1151: other operating systems.</a>
1.294 david 1152: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1153: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1154: (patch included)</a>
1.294 david 1155: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1156: Improper use of ipf <i>keep-state</i> rules can result
1157: in firewall rules being bypassed. (patch included)</a>
1158:
1.124 deraadt 1159: </ul>
1160:
1161: <p>
1162: <li>
1.288 matthieu 1163: <a name="26"></a>
1.119 deraadt 1164:
1.294 david 1165: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1166: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1167: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1168: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1169:
1170: <p>
1171: <ul>
1.294 david 1172: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1173: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1174: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1175: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1176: Improper use of ipf <i>keep-state</i> rules can result
1177: in firewall rules being bypassed. (patch included)</a>
1.294 david 1178: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1179: xlockmore has a bug which a localhost attacker can use to gain
1180: access to the encrypted root password hash (which is normally
1.245 miod 1181: encoded using blowfish</a> (see
1.294 david 1182: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1183: crypt(3)</a>)
1.245 miod 1184: (patch included).
1.294 david 1185: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1186: Systems running with procfs enabled and mounted are
1187: vulnerable to a very tricky exploit. procfs is not
1188: mounted by default.
1189: (patch included).</a>
1.294 david 1190: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1191: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1192: thus exposing the system to a race where the aliases file
1193: did not exist.
1.119 deraadt 1194: (patch included).</a>
1.294 david 1195: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1196: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1197: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1198: A buffer overflow in the RSAREF code included in the
1199: USA version of libssl, is possibly exploitable in
1200: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1201: (patch included).<br></a>
1202: <strong>Update:</strong> Turns out that this was not exploitable
1203: in any of the software included in OpenBSD 2.6.
1.294 david 1204: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1205: Any user could change interface media configurations, resulting in
1206: a localhost denial of service attack.
1.121 deraadt 1207: (patch included).</a>
1.119 deraadt 1208: </ul>
1209:
1210: <p>
1211: <li>
1.288 matthieu 1212: <a name="25"></a>
1.106 deraadt 1213:
1.294 david 1214: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1215: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1216: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1217: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1218:
1.96 deraadt 1219: <p>
1.104 deraadt 1220: <ul>
1.294 david 1221: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1222: In cron(8), make sure argv[] is NULL terminated in the
1223: fake popen() and run sendmail as the user, not as root.
1224: (patch included).</a>
1.294 david 1225: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1226: filesystems had an overrun in their handling of uio_offset
1227: in their readdir() routines. (These filesystems are not
1228: enabled by default). (patch included).</a>
1.294 david 1229: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1230: when we execve() a new process. (patch included).</a>
1.294 david 1231: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1232: been handled by IPsec may be transmitted as cleartext.
1233: PF_KEY SA expirations may leak kernel resources.
1234: (patch included).</a>
1.294 david 1235: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1236: motd re-writing and change the find(1) to use -execdir
1237: (patch included).</a>
1.294 david 1238: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1239: users to chflags(2) or fchflags(2) on character or block devices
1240: which they may currently be the owner of (patch included).</a>
1.294 david 1241: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1242: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1243: </ul>
1244:
1.106 deraadt 1245: <p>
1246: <li>
1.288 matthieu 1247: <a name="24"></a>
1.235 miod 1248:
1.294 david 1249: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1250: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1251: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1252: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1253:
1.96 deraadt 1254: <p>
1.75 deraadt 1255: <ul>
1.294 david 1256: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1257: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1258: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1259: another kernel crash case caused by the <strong>crashme</strong>
1260: program (patch included).</a>
1.294 david 1261: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1262: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1263: (patch included).</a>
1.294 david 1264: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1265: existed in ping(8). (patch included).</a>
1.294 david 1266: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1267: the ipq, which could permit an attacker to cause a crash.
1268: (patch included).</a>
1.294 david 1269: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1270: kernel between accept(2) and select(2) could permit an attacker
1271: to hang sockets from remote.
1272: (patch included).</a>
1.294 david 1273: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1274: bog the machine excessively and cause problems.
1275: (patch included).</a>
1.294 david 1276: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1277: DDB interacted to possibly cause a crash.
1278: (patch included).</a>
1.294 david 1279: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1280: (patch included).</a>
1.294 david 1281: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1282: problem in bootpd(8). (patch included).</a>
1.294 david 1283: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1284: exploitable problem relating to environment variables in termcap
1285: and curses. (patch included).</a>
1.294 david 1286: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1287: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1288: </ul>
1289:
1.106 deraadt 1290: <p>
1291: <li>
1.288 matthieu 1292: <a name="23"></a>
1.235 miod 1293:
1.294 david 1294: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1295: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1296: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1297: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1298:
1.96 deraadt 1299: <p>
1.53 matthieu 1300: <ul>
1.294 david 1301: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1302: problem in bootpd(8). (patch included).</a>
1.294 david 1303: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1304: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1305: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1306: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1307: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1308: chpass(1) has a file descriptor leak which allows an
1309: attacker to modify /etc/master.passwd.</a>
1.294 david 1310: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1311: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1312: should not be executed with fd slots 0, 1, or 2 free.
1313: (patch included).</a>
1.294 david 1314: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1315: libraries (patches included).</a>
1.294 david 1316: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1317: processes too permissive (4th revision patch included).</a>
1.294 david 1318: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1319: of immutable and append-only file flags. (patch included).</a>
1.294 david 1320: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1321: if IPSEC is enabled (patch included).</a>
1.294 david 1322: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1323: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1324: </ul>
1.9 deraadt 1325:
1.106 deraadt 1326: <p>
1327: <li>
1.288 matthieu 1328: <a name="22"></a>
1.235 miod 1329:
1.294 david 1330: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1331: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1332: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1333: still exist in other operating systems. (The supplied patches are for
1334: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1335:
1.96 deraadt 1336: <p>
1.9 deraadt 1337: <ul>
1.294 david 1338: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1339: packets if IPSEC is enabled (patch included).</a>
1.294 david 1340: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1341: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1342: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1343: (patch included).</a>
1.294 david 1344: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1345: (patch included).</a>
1.294 david 1346: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1347: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1348: (patch included).</a>
1.294 david 1349: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1350: export (patch included).</a>
1.112 philen 1351: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1352: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1353: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1354: Acceptance.</a>
1.294 david 1355: A patch is available <a href="errata22.html#sourceroute">here</a>.
1356: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1357: flaw (patch included).</a>
1.294 david 1358: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1359: </ul>
1360:
1.106 deraadt 1361: <p>
1362: <li>
1.288 matthieu 1363: <a name="21"></a>
1.235 miod 1364:
1.294 david 1365: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1366: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1367: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1368: exist in other operating systems. (If you are running OpenBSD 2.1, we
1369: would strongly recommend an upgrade to the newest release, as this
1370: patch list only attempts at fixing the most important security
1371: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1372: security problems. Many of those problems were solved in ways which
1373: make it hard for us to provide patches).
1374:
1.96 deraadt 1375: <p>
1.52 deraadt 1376: <ul>
1.112 philen 1377: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1378: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1379: (patch included)</a>
1.112 philen 1380: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1381: </ul>
1.51 deraadt 1382:
1.106 deraadt 1383: <p>
1384: <li>
1.288 matthieu 1385: <a name="20"></a>
1.235 miod 1386:
1.294 david 1387: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1388: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1389: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1390: exist in other operating systems. (If you are running OpenBSD 2.0, we
1391: commend you for being there back in the old days!, but you're really
1392: missing out if you don't install a new version!)
1393:
1394: <p>
1395: <ul>
1.112 philen 1396: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1397: resolver (patch included)</a>
1398: <li>Many others... if people can hunt them down, please let me know
1399: and we'll put them up here.
1400: </ul>
1.51 deraadt 1401: <p>
1.106 deraadt 1402:
1.288 matthieu 1403: <a name="watching"></a>
1.294 david 1404: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1405:
1.21 deraadt 1406: Since we take a proactive stance with security, we are continually
1407: finding and fixing new security problems. Not all of these problems
1.80 espie 1408: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1409: confirmed to be exploitable; many simple bugs we fix do turn out to
1410: have security consequences we could not predict. We do not have the
1411: time resources to make these changes available in the above format.<p>
1.21 deraadt 1412:
1413: Thus there are usually minor security fixes in the current source code
1414: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1415: guarantee that these problems are of minimal impact and unproven
1.44 ian 1416: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1417: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1418:
1.45 deraadt 1419: People who are really concerned with security can do a number of
1420: things:<p>
1.21 deraadt 1421:
1422: <ul>
1423: <li>If you understand security issues, watch our
1.294 david 1424: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1425: eye out for things which appear security related. Since
1.21 deraadt 1426: exploitability is not proven for many of the fixes we make,
1427: do not expect the relevant commit message to say "SECURITY FIX!".
1428: If a problem is proven and serious, a patch will be available
1429: here very shortly after.
1.161 horacio 1430: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1431: security-announce mailing list</a> which will notify you for every
1.186 ian 1432: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1433: and instruct you on how to patch the problem.
1.21 deraadt 1434: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1435: complete system build from time to time (read /usr/src/Makefile
1436: carefully). Users can make the assumption that the current
1437: source tree always has stronger security than the previous release.
1.45 deraadt 1438: However, building your own system from source code is not trivial;
1.265 miod 1439: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1440: transition between major releases.
1.115 ericj 1441: <li>Install a binary snapshot for your
1.80 espie 1442: architecture, which are made available fairly often. For
1.29 deraadt 1443: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1444: </ul>
1445:
1.9 deraadt 1446: <p>
1.288 matthieu 1447: <a name="reporting"></a>
1.294 david 1448: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1449:
1.5 deraadt 1450: <p> If you find a new security problem, you can mail it to
1.294 david 1451: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1452: <br>
1.5 deraadt 1453: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1454: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1455:
1.107 deraadt 1456: <p>
1.288 matthieu 1457: <a name="papers"></a>
1.294 david 1458: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1459:
1460: A number of papers have been written by OpenBSD team members, about security
1461: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1462: documents are available as follows.<p>
1.107 deraadt 1463:
1464: <ul>
1.113 deraadt 1465: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1466: <a href="events.html#usenix99">Usenix 1999</a>,
1467: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1468: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1469: <a href="papers/bcrypt-paper.ps">paper</a> and
1470: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1471: <p>
1472: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1473: <a href="events.html#usenix99">Usenix 1999</a>,
1474: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1475: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1476: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1477: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1478: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1479: <a href="papers/crypt-paper.ps">paper</a> and
1480: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1481: <p>
1482: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1483: <a href="events.html#usenix99">Usenix 1999</a>,
1484: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1485: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1486: <a href="papers/strlcpy-paper.ps">paper</a> and
1487: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1488: <p>
1.118 deraadt 1489: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1490: <a href="events.html#lisa99">LISA 1999</a>,
1491: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1492: <a href="papers/authgw-paper.ps">paper</a> and
1493: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1494: <p>
1.153 jufi 1495: <li>Encrypting Virtual Memory<br>
1.294 david 1496: <a href="events.html#sec2000">Usenix Security 2000</a>,
1497: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1498: <a href="papers/swapencrypt.ps">paper</a> and
1499: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1500: <p>
1.107 deraadt 1501: </ul>
1.294 david 1502: </ul>
1.106 deraadt 1503:
1.2 deraadt 1504: <hr>
1.294 david 1505: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1506: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1507: <br>
1.330 ! brad 1508: <small>$OpenBSD: security.html,v 1.329 2006/09/09 03:04:22 brad Exp $</small>
1.1 deraadt 1509:
1.24 deraadt 1510: </body>
1511: </html>