Annotation of www/security.html, Revision 1.349
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.280 david 57: <a href="#34">3.4</a>,
1.301 miod 58: <a href="#35">3.5</a>,
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>,
65: <a href="#42">4.2</a>.
1.114 philen 66: </td>
67: </tr>
68: </table>
1.56 deraadt 69: <hr>
70:
1.294 david 71: <a name="goals"></a>
1.278 deraadt 72: <ul>
1.294 david 73: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 74:
1.14 deraadt 75: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 76: ONE in the industry for security (if we are not already there). Our
77: open software development model permits us to take a more
78: uncompromising view towards increased security than Sun, SGI, IBM, HP,
79: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 80: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 81: cryptography</a>, we are able to take cryptographic approaches towards
82: fixing security problems.<p>
1.18 deraadt 83:
1.288 matthieu 84: <a name="disclosure"></a>
1.294 david 85: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 86:
1.45 deraadt 87: Like many readers of the
1.196 jufi 88: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 89: BUGTRAQ mailing list</a>,
1.106 deraadt 90: we believe in full disclosure of security problems. In the
91: operating system arena, we were probably the first to embrace
92: the concept. Many vendors, even of free software, still try
93: to hide issues from their users.<p>
94:
95: Security information moves very fast in cracker circles. On the other
96: hand, our experience is that coding and releasing of proper security
97: fixes typically requires about an hour of work -- very fast fix
98: turnaround is possible. Thus we think that full disclosure helps the
99: people who really care about security.<p>
100:
1.288 matthieu 101: <a name="process"></a>
1.294 david 102: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 103:
1.12 deraadt 104: Our security auditing team typically has between six and twelve
1.45 deraadt 105: members who continue to search for and fix new security holes. We
106: have been auditing since the summer of 1996. The process we follow to
107: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 108: every critical software component. We are not so much looking for
109: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 110: years later someone discovers the problem used to be a security
1.106 deraadt 111: issue, and we fixed it because it was just a bug, well, all the
112: better. Flaws have been found in just about every area of the system.
113: Entire new classes of security problems have been found during our
114: audit, and often source code which had been audited earlier needs
115: re-auditing with these new flaws in mind. Code often gets audited
116: multiple times, and by multiple people with different auditing
117: skills.<p>
1.12 deraadt 118:
1.94 deraadt 119: Some members of our security auditing team worked for Secure Networks,
120: the company that made the industry's premier network security scanning
121: software package Ballista (Secure Networks got purchased by Network
122: Associates, Ballista got renamed to Cybercop Scanner, and well...)
123: That company did a lot of security research, and thus fit in well
1.106 deraadt 124: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
125: colours since day 1.<p>
1.31 deraadt 126:
1.34 deraadt 127: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 128: In most cases we have found that the determination of exploitability
129: is not an issue. During our ongoing auditing process we find many
130: bugs, and endeavor to fix them even though exploitability is not
131: proven. We fix the bug, and we move on to find other bugs to fix. We
132: have fixed many simple and obvious careless programming errors in code
133: and only months later discovered that the problems were in fact
134: exploitable. (Or, more likely someone on
1.197 jufi 135: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 136: would report that other operating systems were vulnerable to a `newly
137: discovered problem', and then it would be discovered that OpenBSD had
138: been fixed in a previous release). In other cases we have been saved
139: from full exploitability of complex step-by-step attacks because we
140: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 141: managed such a success is the lpd advisory that Secure Networks put out.
142: <p>
1.29 deraadt 143:
1.288 matthieu 144: <a name="newtech"></a>
1.294 david 145: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 146:
147: As we audit source code, we often invent new ways of solving problems.
148: Sometimes these ideas have been used before in some random application
149: written somewhere, but perhaps not taken to the degree that we do.
150: <p>
151:
152: <ul>
153: <li>strlcpy() and strlcat()
154: <li>Memory protection purify
155: <ul>
156: <li>W^X
157: <li>.rodata segment
158: <li>Guard pages
159: <li>Randomized malloc()
160: <li>Randomized mmap()
161: <li>atexit() and stdio protection
162: </ul>
1.295 otto 163: <li>Privilege separation
1.278 deraadt 164: <li>Privilege revocation
165: <li>Chroot jailing
166: <li>New uids
167: <li>ProPolice
168: <li>... and others
169: </ul>
170: <p>
171:
1.294 david 172: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 173:
1.45 deraadt 174: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 175: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 176: commonplace in security forums like
1.197 jufi 177: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 178:
1.45 deraadt 179: The most intense part of our security auditing happened immediately
1.80 espie 180: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 181: over the last third of 1996 and first half of 1997. Thousands (yes,
182: thousands) of security issues were fixed rapidly over this year-long
183: period; bugs like the standard buffer overflows, protocol
184: implementation weaknesses, information gathering, and filesystem
185: races. Hence most of the security problems that we encountered were
186: fixed before our 2.1 release, and then a far smaller number needed
187: fixing for our 2.2 release. We do not find as many problems anymore,
188: it is simply a case of diminishing returns. Recently the security
189: problems we find and fix tend to be significantly more obscure or
190: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 191:
1.35 deraadt 192: <ul>
1.45 deraadt 193: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 194: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 195: to search for more complicated exploits, so we will too.
196: <li>Finding and fixing subtle flaws in complicated software is
197: a lot of fun.
1.35 deraadt 198: </ul>
1.106 deraadt 199: <p>
1.15 deraadt 200:
1.14 deraadt 201: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 202: to find and fix new security flaws.<p>
1.12 deraadt 203:
1.288 matthieu 204: <a name="default"></a>
1.294 david 205: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 206:
207: To ensure that novice users of OpenBSD do not need to become security
208: experts overnight (a viewpoint which other vendors seem to have), we
209: ship the operating system in a Secure by Default mode. All non-essential
210: services are disabled. As the user/administrator becomes more familiar
211: with the system, he will discover that he has to enable daemons and other
212: parts of the system. During the process of learning how to enable a new
213: service, the novice is more likely to learn of security considerations.<p>
214:
215: This is in stark contrast to the increasing number of systems that
216: ship with NFS, mountd, web servers, and various other services enabled
217: by default, creating instantaneous security problems for their users
218: within minutes after their first install.<p>
219:
1.288 matthieu 220: <a name="crypto"></a>
1.294 david 221: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 222:
223: And of course, since the OpenBSD project is based in Canada, it is possible
224: for us to integrate cryptography. For more information, read the page
1.116 deraadt 225: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 226:
1.294 david 227: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 228:
229: <li>
1.348 merdely 230: <a name="42"></a>
231:
232: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
233: These are the OpenBSD 4.2 advisories -- all these problems are solved
234: in <a href=anoncvs.html>OpenBSD current</a> and the
235: <a href=stable.html>patch branch</a>.
236:
237: <p>
238: <ul>
1.349 ! deraadt 239: <li><a href="errata42.html#001_file">Oct 9, 2007:
! 240: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 241: </ul>
242:
243: <li>
1.346 matthieu 244: <a name="41"></a>
245:
246: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
247: These are the OpenBSD 4.1 advisories -- all these problems are solved
248: in <a href=anoncvs.html>OpenBSD current</a> and the
249: <a href=stable.html>patch branch</a>.
250:
251: <p>
252: <ul>
1.349 ! deraadt 253: <li><a href="errata41.html#010_file">Oct 9, 2007:
! 254: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 255: <li><a href="errata41.html#009_file">Jul 9, 2007:
256: Fix possible heap overflow in file(1).</a>
1.346 matthieu 257: <li><a href="errata41.html#005_route6">Apr 27, 2007:
258: IPv6 type 0 route headers can be used to mount a DoS attack
259: against hosts and networks.</a>
260: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
261: Multiple vulnerabilities in X.Org.</a>
262: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
263: Incorrect mbuf handling for ICMP6 packets.</a>
264: </ul>
265:
266: <li>
1.334 brad 267: <a name="40"></a>
268: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
269: These are the OpenBSD 4.0 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>
1.349 ! deraadt 275: <li><a href="errata40.html#016_file">Oct 9, 2007:
! 276: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 277: <li><a href="errata40.html#015_file">Jul 9, 2007:
278: Fix possible heap overflow in file(1).</a>
1.343 deraadt 279: <li><a href="errata40.html#012_route6">Apr 23, 2007:
280: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 281: against hosts and networks.</a>
1.342 mbalmer 282: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
283: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 284: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
285: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 286: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 287: Insufficient validation in vga(4) may allow an attacker to gain
288: root privileges on some i386 systems.</a>
1.339 deraadt 289: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 290: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 291: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 292: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
293: found by Chris Evans.</a>
1.339 deraadt 294: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 295: Several problems have been found in OpenSSL.</a>
1.339 deraadt 296: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 297: httpd(8) does not sanitize the Expect header from an HTTP request
298: when it is reflected back in an error message, which might allow
299: cross-site scripting (XSS) style attacks.</a>
300: </ul>
301:
302: <li>
1.321 brad 303: <a name="39"></a>
304:
305: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
306: These are the OpenBSD 3.9 advisories -- all these problems are solved
307: in <a href=anoncvs.html>OpenBSD current</a> and the
308: <a href=stable.html>patch branch</a>.
309:
310: <p>
311: <ul>
1.343 deraadt 312: <li><a href="errata39.html#022_route6">Apr 23, 2007:
313: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 314: against hosts and networks.</a>
1.342 mbalmer 315: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
316: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 317: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
318: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 319: <li><a href="errata39.html#agp">Jan 3, 2007:
320: Insufficient validation in vga(4) may allow an attacker to gain
321: root privileges on some i386 systems.</a>
1.336 brad 322: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 323: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 324: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 325: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 326: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 327: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 328: found by Chris Evans.</a>
1.333 deraadt 329: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 330: Several problems have been found in OpenSSL.</a>
1.333 deraadt 331: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 332: httpd(8) does not sanitize the Expect header from an HTTP request
333: when it is reflected back in an error message, which might allow
334: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 335: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 336: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
337: possible for an attacker to construct an invalid signature which
338: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 339: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 340: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 341: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 342: Due to the failure to correctly validate LCP configuration option
343: lengths, it is possible for an attacker to send LCP packets via an
344: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 345: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 346: A problem in isakmpd(8) caused IPsec to run partly without replay
347: protection.</a>
1.333 deraadt 348: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 349: It is possible to cause the kernel to panic when more than the default
350: number of sempahores have been allocated.</a>
1.333 deraadt 351: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 352: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
353: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
354: option.</a>
1.333 deraadt 355: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 356: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 357: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 358: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
359: overflow.</a>
1.333 deraadt 360: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 361: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 362: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 363: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 364: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 365: A race condition has been reported to exist in the handling by sendmail
366: of asynchronous signals.</a>
367: </ul>
368:
1.338 miod 369: <p>
370: OpenBSD 3.8 and earlier releases are not supported anymore. The following
371: paragraphs only list advisories issued while they were maintained; these
372: releases are likely to be affected by the advisories for more recent releases.
373: <br>
374:
1.321 brad 375: <li>
1.318 deraadt 376: <a name="38"></a>
377:
378: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
379: These are the OpenBSD 3.8 advisories -- all these problems are solved
380: in <a href=anoncvs.html>OpenBSD current</a> and the
381: <a href=stable.html>patch branch</a>.
382:
383: <p>
384: <ul>
1.332 brad 385: <li><a href="errata38.html#ssh2">Oct 12, 2006:
386: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 387: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 388: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 389: found by Chris Evans.</a>
390: <li><a href="errata38.html#openssl2">Oct 7, 2006:
391: Several problems have been found in OpenSSL.</a>
392: <li><a href="errata38.html#httpd2">Oct 7, 2006:
393: httpd(8) does not sanitize the Expect header from an HTTP request
394: when it is reflected back in an error message, which might allow
395: cross-site scripting (XSS) style attacks.</a>
1.329 brad 396: <li><a href="errata38.html#openssl">Sep 8, 2006:
397: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
398: possible for an attacker to construct an invalid signature which
399: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 400: <li><a href="errata38.html#bind">Sep 8, 2006:
401: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 402: <li><a href="errata38.html#sppp">Sep 2, 2006:
403: Due to the failure to correctly validate LCP configuration option
404: lengths, it is possible for an attacker to send LCP packets via an
405: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 406: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
407: A problem in isakmpd(8) caused IPsec to run partly without replay
408: protection.</a>
409: <li><a href="errata38.html#sem">Aug 25, 2006:
410: It is possible to cause the kernel to panic when more than the default
411: number of sempahores have been allocated.</a>
412: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
413: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
414: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
415: option.</a>
416: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
417: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 418: <li><a href="errata38.html#httpd">Jul 30, 2006:
419: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
420: overflow.</a>
1.324 brad 421: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
422: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 423: <li><a href="errata38.html#xorg">May 2, 2006:
424: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 425: <li><a href="errata38.html#sendmail">Mar 25, 2006:
426: A race condition has been reported to exist in the handling by sendmail
427: of asynchronous signals.</a>
428: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 429: Josh Bressers has reported a weakness in OpenSSH caused due to the
430: insecure use of the system(3) function in scp(1) when performing copy
431: operations using filenames that are supplied by the user from the
432: command line.</a>
1.321 brad 433: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 434: Do not allow users to trick suid programs into re-opening files via
435: /dev/fd.</a>
1.321 brad 436: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 437: A buffer overflow has been found in the Perl interpreter with the
438: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 439: </ul>
440:
441: <li>
1.312 david 442: <a name="37"></a>
443:
444: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
445: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 446: in <a href="anoncvs.html">OpenBSD current</a>. The
447: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
448: you should update your machine.
1.312 david 449:
450: <p>
451: <ul>
1.322 brad 452: <li><a href="errata37.html#xorg">May 2, 2006:
453: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 454: <li><a href="errata37.html#sendmail">Mar 25, 2006:
455: A race condition has been reported to exist in the handling by sendmail
456: of asynchronous signals.</a>
1.320 brad 457: <li><a href="errata37.html#ssh">Feb 12, 2006:
458: Josh Bressers has reported a weakness in OpenSSH caused due to the
459: insecure use of the system(3) function in scp(1) when performing copy
460: operations using filenames that are supplied by the user from the
461: command line.</a>
1.319 brad 462: <li><a href="errata37.html#fd">Jan 5, 2006:
463: Do not allow users to trick suid programs into re-opening files via
464: /dev/fd.</a>
465: <li><a href="errata37.html#perl">Jan 5, 2006:
466: A buffer overflow has been found in the Perl interpreter with the
467: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 468: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 469: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 470: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 471: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 472: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 473: Fix a race condition in sudo(8) that could allow a user
1.315 millert 474: to run arbitrary commands.</a>
1.318 deraadt 475: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 476: Fix a buffer overflow, memory leaks, and NULL pointer
477: dereference in cvs(1).</a>
1.312 david 478: </ul>
479:
480: <li>
1.301 miod 481: <a name="36"></a>
482:
483: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
484: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 485: in <a href="anoncvs.html">OpenBSD current</a>. The
486: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
487: you should update your machine.
1.301 miod 488:
489: <p>
1.302 markus 490: <ul>
1.317 millert 491: <li><a href="errata36.html#libz2">Jul 21, 2005:
492: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 493: <li><a href="errata36.html#libz">Jul 6, 2005:
494: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 495: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 496: Fix a race condition in sudo(8) that could allow a user
1.315 millert 497: to run arbitrary commands.</a>
1.311 deraadt 498: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 499: Fix a buffer overflow, memory leaks, and NULL pointer
500: dereference in cvs(1).</a>
1.311 deraadt 501: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 502: Due to buffer overflows in telnet(1), a malicious
503: server or man-in-the-middle attack could allow
504: execution of arbitrary code with the privileges of
505: the user invoking telnet(1).</a>
1.311 deraadt 506: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 507: More stringent checking should be done in the copy(9)
508: functions to prevent their misuse.</a>
1.311 deraadt 509: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 510: More stringent checking should be done in the copy(9)
511: functions to prevent their misuse.</a>
1.311 deraadt 512: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 513: httpd(8)'s mod_include module fails to properly validate
514: the length of user supplied tag strings prior to copying
1.305 brad 515: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 516: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 517: On systems running isakmpd(8) it is possible for a local
518: user to cause kernel memory corruption and system panic by
1.303 markus 519: setting ipsec(4) credentials on a socket.</a>
1.302 markus 520: </ul>
1.301 miod 521:
522: <li>
1.288 matthieu 523: <a name="35"></a>
1.279 deraadt 524:
1.294 david 525: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 526: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 527: in <a href="anoncvs.html">OpenBSD current</a>. The
528: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
529: you should update your machine.
1.279 deraadt 530:
531: <p>
532: <ul>
1.310 brad 533: <li><a href="errata35.html#cvs4">Apr 28, 2005:
534: Fix a buffer overflow, memory leaks, and NULL pointer
535: dereference in cvs(1).</a>
1.309 brad 536: <li><a href="errata35.html#telnet">Mar 30, 2005:
537: Due to buffer overflows in telnet(1), a malicious
538: server or man-in-the-middle attack could allow
539: execution of arbitrary code with the privileges of
540: the user invoking telnet(1).</a>
1.308 brad 541: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 542: More stringent checking should be done in the copy(9)
543: functions to prevent their misuse.</a>
1.306 brad 544: <li><a href="errata35.html#locore">Feb 28, 2005:
545: More stringent checking should be done in the copy(9)
546: functions to prevent their misuse.</a>
1.304 brad 547: <li><a href="errata35.html#httpd3">Jan 12, 2005:
548: httpd(8)'s mod_include module fails to properly validate
549: the length of user supplied tag strings prior to copying
1.305 brad 550: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 551: <li><a href="errata35.html#pfkey">Dec 14, 2004:
552: On systems running isakmpd(8) it is possible for a local
553: user to cause kernel memory corruption and system panic by
1.303 markus 554: setting ipsec(4) credentials on a socket.</a>
1.301 miod 555: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 556: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 557: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 558: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 559: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 560: httpd(8)'s mod_rewrite module can be made to write one zero byte in
561: an arbitrary memory position outside of a char array, causing a DoS
562: or possibly buffer overflows.</a>
1.301 miod 563: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 564: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 565: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 566: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 567: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 568: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 569: Multiple remote vulnerabilities have been found in the cvs(1)
570: server which can be used by CVS clients to crash or execute
1.293 brad 571: arbitrary code on the server.</a>
1.301 miod 572: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 573: kdc(8) performs inadequate checking of request fields, leading
574: to the possibility of principal impersonation from other
575: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 576: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 577: xdm(1) ignores the requestPort resource and creates a
1.293 brad 578: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 579: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 580: A buffer overflow in the cvs(1) server has been found,
581: which can be used by CVS clients to execute arbitrary code on
1.293 brad 582: the server.</a>
1.301 miod 583: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 584: Integer overflow problems were found in procfs, allowing
1.293 brad 585: reading of arbitrary kernel memory.</a>
1.301 miod 586: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 587: Pathname validation problems have been found in cvs(1),
588: allowing clients and servers access to files outside the
1.293 brad 589: repository or local CVS tree.</a>
1.279 deraadt 590: </ul>
591:
592: <p>
593: <li>
1.288 matthieu 594: <a name="34"></a>
1.261 david 595:
1.294 david 596: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 597: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 598: in <a href="anoncvs.html">OpenBSD current</a>. The
599: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
600: you should update your machine.
1.261 david 601: <p>
602: <ul>
1.302 markus 603: <li><a href="errata34.html#pfkey">Dec 14, 2004:
604: On systems running isakmpd(8) it is possible for a local
605: user to cause kernel memory corruption and system panic by
1.303 markus 606: setting ipsec(4) credentials on a socket.</a>
1.298 brad 607: <li><a href="errata34.html#xpm">Sep 16, 2004:
608: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 609: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
610: httpd(8)'s mod_rewrite module can be made to write one zero byte in
611: an arbitrary memory position outside of a char array, causing a DoS
612: or possibly buffer overflows.</a>
1.294 david 613: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 614: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 615: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 616: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 617: an attacker can delete IPsec tunnels at will.</a>
1.294 david 618: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 619: Multiple remote vulnerabilities have been found in the cvs(1)
620: server which can be used by CVS clients to crash or execute
1.293 brad 621: arbitrary code on the server.</a>
1.294 david 622: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 623: kdc(8) performs inadequate checking of request fields, leading
624: to the possibility of principal impersonation from other
625: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 626: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 627: A buffer overflow in the cvs(1) server has been found,
628: which can be used by CVS clients to execute arbitrary code on
629: the server.</a>
1.294 david 630: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 631: Integer overflow problems were found in procfs, allowing
632: reading of arbitrary kernel memory.</a>
1.294 david 633: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 634: Pathname validation problems have been found in cvs(1),
635: allowing clients and servers access to files outside the
636: repository or local CVS tree.</a>
1.294 david 637: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 638: A missing check for a NULL-pointer dereference may allow a
1.281 otto 639: remote attacker to crash applications using OpenSSL.</a>
1.294 david 640: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 641: Defects in the payload validation and processing functions of
642: isakmpd have been discovered. An attacker could send malformed
643: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 644: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 645: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
646: access module, using IP addresses without a netmask on big endian
647: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 648: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 649: An IPv6 MTU handling problem exists that could be used by an
650: attacker to cause a denial of service attack.</a>
1.294 david 651: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 652: A reference counting bug in shmat(2) could be used to write to
653: kernel memory under certain circumstances.</a>
1.294 david 654: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 655: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 656: by Thomas Walpuski.</a>
1.294 david 657: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 658: It may be possible for a local user to overrun the stack in
659: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 660: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 661: The use of certain ASN.1 encodings or malformed public keys may
662: allow an attacker to mount a denial of service attack against
663: applications linked with ssl(3).</a>
1.261 david 664: </ul>
665:
666: <li>
1.288 matthieu 667: <a name="33"></a>
1.246 deraadt 668:
1.294 david 669: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 670: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 671: in <a href="anoncvs.html">OpenBSD current</a>. The
672: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 673: you should update your machine.
1.246 deraadt 674: <p>
675: <ul>
1.294 david 676: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 677: Pathname validation problems have been found in cvs(1),
678: allowing clients and servers access to files outside the
679: repository or local CVS tree.</a>
1.294 david 680: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 681: A missing check for a NULL-pointer dereference may allow a
1.281 otto 682: remote attacker to crash applications using OpenSSL.</a>
1.294 david 683: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 684: Defects in the payload validation and processing functions of
685: isakmpd have been discovered. An attacker could send malformed
686: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 687: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 688: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
689: access module, using IP addresses without a netmask on big endian
690: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 691: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 692: An IPv6 MTU handling problem exists that could be used by an
693: attacker to cause a denial of service attack.</a>
1.294 david 694: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 695: A reference counting bug in shmat(2) could be used to write to
696: kernel memory under certain circumstances.</a>
1.294 david 697: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 698: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 699: by Thomas Walpuski.</a>
1.294 david 700: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 701: It may be possible for a local user to execute arbitrary code
702: resulting in escalation of privileges due to a stack overrun
703: in compat_ibcs2(8).</a>
1.294 david 704: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 705: The use of certain ASN.1 encodings or malformed public keys may
706: allow an attacker to mount a denial of service attack against
707: applications linked with ssl(3).</a>
1.294 david 708: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 709: Access of freed memory in pf(4) could be used to
1.260 margarid 710: remotely panic a machine using scrub rules.</a>
1.294 david 711: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 712: A buffer overflow in the address parsing in
713: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 714: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 715: OpenSSH versions prior to 3.7 contains a buffer management error
716: that is potentially exploitable.</a>
1.294 david 717: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 718: Root may be able to reduce the security level by taking advantage of
719: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 720: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 721: An improper bounds check in the kernel may allow a local user
722: to panic the kernel.</a>
1.294 david 723: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 724: An off-by-one error exists in the C library function realpath(3)
725: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 726: </ul>
727:
1.265 miod 728:
1.247 david 729: <p>
1.246 deraadt 730: <li>
1.288 matthieu 731: <a name="32"></a>
1.224 deraadt 732:
1.294 david 733: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 734: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 735: in <a href="anoncvs.html">OpenBSD current</a>. The
736: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 737: you should update your machine.
1.224 deraadt 738: <p>
739: <ul>
1.294 david 740: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 741: The use of certain ASN.1 encodings or malformed public keys may
742: allow an attacker to mount a denial of service attack against
743: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 744: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 745: Access of freed memory in pf(4) could be used to
1.260 margarid 746: remotely panic a machine using scrub rules.</a>
1.294 david 747: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 748: A buffer overflow in the address parsing in
749: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 750: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 751: OpenSSH versions prior to 3.7 contains a buffer management error
752: that is potentially exploitable.</a>
1.294 david 753: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 754: Fix for a potential security issue in
755: sendmail(8) with respect to DNS maps.</a>
1.294 david 756: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 757: An off-by-one error exists in the C library function realpath(3)
758: may allow an attacker to gain escalated privileges.</a>
1.294 david 759: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 760: A buffer overflow in the address parsing in
761: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 762: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 763: A cryptographic weaknesses in the Kerberos v4 protocol can be
764: exploited on Kerberos v5 as well.</a>
1.294 david 765: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 766: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 767: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 768: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 769: Various SSL and TLS operations in OpenSSL are vulnerable to
770: timing attacks.</a>
1.294 david 771: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 772: A buffer overflow in lprm(1) may allow an attacker to elevate
773: privileges to user daemon.</a>.
1.294 david 774: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 775: A buffer overflow in the envelope comments processing in
776: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 777: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 778: httpd(8) leaks file inode numbers via ETag header as well as
779: child PIDs in multipart MIME boundary generation. This could
780: lead, for example, to NFS exploitation because it uses inode
781: numbers as part of the file handle.</a>
1.294 david 782: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 783: In ssl(8) an information leak can occur via timing by performing
784: a MAC computation even if incorrect block cipher padding has
785: been found, this is a countermeasure. Also, check for negative
786: sizes, in allocation routines.</a>
1.294 david 787: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 788: A double free exists in cvs(1) that could lead to privilege
789: escalation for cvs configurations where the cvs command is
1.233 margarid 790: run as a privileged user.</a>
1.294 david 791: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 792: A buffer overflow exists in named(8) that could lead to a
793: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 794: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 795: A logic error in the pool kernel memory allocator could cause
796: memory corruption in low-memory situations, causing the system
797: to crash.</a>
1.294 david 798: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 799: An attacker can bypass smrsh(8)'s restrictions and execute
800: arbitrary commands with the privileges of his own account.</a>
1.294 david 801: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 802: Network bridges running pf with scrubbing enabled could cause
803: mbuf corruption, causing the system to crash.</a>
1.294 david 804: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 805: A buffer overflow can occur in the kadmind(8) daemon, leading
806: to possible remote crash or exploit.</a>
1.224 deraadt 807: </ul>
808:
1.227 miod 809: <p>
810: <li>
1.288 matthieu 811: <a name="31"></a>
1.203 deraadt 812:
1.294 david 813: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 814: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 815: in <a href="anoncvs.html">OpenBSD current</a>. The
816: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 817: you should update your machine.
1.203 deraadt 818:
819: <p>
820: <ul>
1.294 david 821: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 822: A buffer overflow in the address parsing in
823: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 824: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 825: A cryptographic weaknesses in the Kerberos v4 protocol can be
826: exploited on Kerberos v5 as well.</a>
1.294 david 827: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 828: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 829: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 830: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 831: Various SSL and TLS operations in OpenSSL are vulnerable to
832: timing attacks.</a>
1.294 david 833: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 834: A buffer overflow in lprm(1) may allow an attacker to gain
835: root privileges.</a>
1.294 david 836: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 837: A buffer overflow in the envelope comments processing in
838: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 839: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 840: In ssl(8) an information leak can occur via timing by performing
841: a MAC computation even if incorrect block cipher padding has
842: been found, this is a countermeasure. Also, check for negative
843: sizes, in allocation routines.</a>
1.294 david 844: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 845: A double free exists in cvs(1) that could lead to privilege
846: escalation for cvs configurations where the cvs command is
1.294 david 847: run as a privileged user</a>.
848: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 849: A buffer overflow exists in named(8) that could lead to a
850: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 851: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 852: Incorrect argument checking in the getitimer(2) system call
853: may allow an attacker to crash the system.</a>
1.294 david 854: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 855: An attacker can bypass smrsh(8)'s restrictions and execute
856: arbitrary commands with the privileges of his own account.</a>
1.294 david 857: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 858: A buffer overflow can occur in the kadmind(8) daemon, leading
859: to possible remote crash or exploit.</a>
1.294 david 860: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 861: Incorrect argument checking in the setitimer(2) system call
862: may allow an attacker to write to kernel memory.</a>
1.294 david 863: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 864: An insufficient boundary check in the select system call
1.220 miod 865: allows an attacker to overwrite kernel memory and execute arbitrary code
866: in kernel context.</a>
1.294 david 867: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 868: Several remote buffer overflows can occur in the SSL2 server and SSL3
869: client of the ssl(8) library, as in the ASN.1 parser code in the
870: crypto(3) library, all of them being potentially remotely
871: exploitable.</a>
1.294 david 872: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 873: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
874: possible remote crash.</a>
1.294 david 875: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 876: A race condition exists in the pppd(8) daemon which may cause it to
877: alter the file permissions of an arbitrary file.</a>
1.294 david 878: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 879: Receiving IKE payloads out of sequence can cause isakmpd(8) to
880: crash.</a>
1.294 david 881: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 882: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 883: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 884: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 885: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 886: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 887: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 888: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 889: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 890: input validation error that can result in an integer overflow and
891: privilege escalation.</a>
1.294 david 892: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 893: A buffer overflow can occur during the interpretation of chunked
894: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 895: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 896: Under certain conditions, on systems using YP with netgroups
897: in the password database, it is possible that sshd(8) does
898: ACL checks for the requested user name but uses the password
899: database entry of a different user for authentication. This
900: means that denied users might authenticate successfully
901: while permitted users could be locked out.</a>
1.294 david 902: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 903: A race condition exists that could defeat the kernel's
904: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 905: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 906: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 907: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 908: A local user can gain super-user privileges due to a buffer
909: overflow in sshd(8) if AFS has been configured on the system
910: or if KerberosTgtPassing or AFSTokenPassing has been enabled
911: in the sshd_config file.</a>
1.203 deraadt 912: </ul>
913:
1.235 miod 914: <p>
1.203 deraadt 915: <li>
1.288 matthieu 916: <a name="30"></a>
1.187 deraadt 917:
1.294 david 918: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 919: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 920: in <a href="anoncvs.html">OpenBSD current</a>. The
921: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 922: you should update your machine.
1.187 deraadt 923:
924: <p>
925: <ul>
1.294 david 926: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 927: A buffer overflow exists in named(8) that could lead to a
928: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 929: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 930: Incorrect argument checking in the getitimer(2) system call
931: may allow an attacker to crash the system.</a>
1.294 david 932: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 933: An attacker can bypass smrsh(8)'s restrictions and execute
934: arbitrary commands with the privileges of his own account.</a>
1.294 david 935: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 936: A buffer overflow can occur in the kadmind(8) daemon, leading
937: to possible remote crash or exploit.</a>
1.294 david 938: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 939: Incorrect argument checking in the setitimer(2) system call
940: may allow an attacker to write to kernel memory.</a>
1.294 david 941: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 942: An insufficient boundary check in the select and poll system calls
943: allows an attacker to overwrite kernel memory and execute arbitrary code
944: in kernel context.</a>
1.294 david 945: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 946: Several remote buffer overflows can occur in the SSL2 server and SSL3
947: client of the ssl(8) library, as in the ASN.1 parser code in the
948: crypto(3) library, all of them being potentially remotely
949: exploitable.</a>
1.294 david 950: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 951: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
952: possible remote crash.</a>
1.294 david 953: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 954: A race condition exists in the pppd(8) daemon which may cause it to
955: alter the file permissions of an arbitrary file.</a>
1.294 david 956: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 957: Receiving IKE payloads out of sequence can cause isakmpd(8) to
958: crash.</a>
1.294 david 959: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 960: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 961: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 962: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 963: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 964: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 965: input validation error that can result in an integer overflow and
966: privilege escalation.</a>
1.294 david 967: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 968: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 969: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 970: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 971: A buffer overflow can occur during the interpretation of chunked
972: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 973: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 974: A race condition exists that could defeat the kernel's
975: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 976: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 977: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 978: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 979: A local user can gain super-user privileges due to a buffer
980: overflow in sshd(8) if AFS has been configured on the system
981: or if KerberosTgtPassing or AFSTokenPassing has been enabled
982: in the sshd_config file.</a>
1.294 david 983: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 984: The mail(1) was interpreting tilde escapes even when invoked
985: in non-interactive mode. As mail(1) is called as root from cron,
986: this can lead to a local root compromise.</a>
1.294 david 987: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 988: Under certain conditions, on systems using YP with netgroups in
989: the password database, it is possible for the rexecd(8) and rshd(8)
990: daemons to execute a shell from a password database entry for a
991: different user. Similarly, atrun(8) may change to the wrong
992: home directory when running jobs.</a>
1.294 david 993: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 994: A potential double free() exists in the zlib library;
995: this is not exploitable on OpenBSD.
996: The kernel also contains a copy of zlib; it is not
997: currently known if the kernel zlib is exploitable.</a>
1.294 david 998: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 999: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1000: may allow a local user to gain super-user privileges.</a>
1.294 david 1001: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1002: A race condition between the ptrace(2) and execve(2) system calls
1003: allows an attacker to modify the memory contents of suid/sgid
1004: processes which could lead to compromise of the super-user account.</a>
1.294 david 1005: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1006: There is a security hole in sudo(8) that can be exploited
1007: when the Postfix sendmail replacement is installed that may
1008: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1009: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1010: An attacker can trick a machine running the lpd daemon into
1011: creating new files in the root directory from a machine with
1012: remote line printer access.</a>
1.294 david 1013: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1014: The vi.recover script can be abused in such a way as
1015: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1016: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1017: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1018: resulting in a crash.</a>
1.294 david 1019: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1020: A security hole that may allow an attacker to partially authenticate
1021: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1022: </ul>
1023:
1024: <p>
1025: <li>
1.288 matthieu 1026: <a name="29"></a>
1.173 deraadt 1027:
1.294 david 1028: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1029: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1030: in <a href="anoncvs.html">OpenBSD current</a>. The
1031: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1032: you should update your machine.
1033:
1.173 deraadt 1034:
1035: <p>
1036: <ul>
1.294 david 1037: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1038: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1039: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1040: A race condition exists that could defeat the kernel's
1041: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1042: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1043: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1044: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1045: A local user can gain super-user privileges due to a buffer
1046: overflow in sshd(8) if AFS has been configured on the system
1047: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1048: in the sshd_config file.</a>
1.294 david 1049: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1050: The mail(1) was interpreting tilde escapes even when invoked
1051: in non-interactive mode. As mail(1) is called as root from cron,
1052: this can lead to a local root compromise.</a>
1.294 david 1053: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1054: A potential double free() exists in the zlib library;
1055: this is not exploitable on OpenBSD.
1056: The kernel also contains a copy of zlib; it is not
1057: currently known if the kernel zlib is exploitable.</a>
1.294 david 1058: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1059: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1060: may allow a local user to gain super-user privileges.</a>
1.294 david 1061: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1062: A race condition between the ptrace(2) and execve(2) system calls
1063: allows an attacker to modify the memory contents of suid/sgid
1064: processes which could lead to compromise of the super-user account.</a>
1.294 david 1065: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1066: There is a security hole in sudo(8) that can be exploited
1067: when the Postfix sendmail replacement is installed that may
1068: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1069: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1070: An attacker can trick a machine running the lpd daemon into
1071: creating new files in the root directory from a machine with
1072: remote line printer access.</a>
1.294 david 1073: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1074: The vi.recover script can be abused in such a way as
1075: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1076: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1077: A security hole exists in uuxqt(8) that may allow an
1078: attacker to gain root privileges.</a>
1.294 david 1079: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1080: A security hole exists in lpd(8) that may allow an
1081: attacker to gain root privileges if lpd is running.</a>
1.294 david 1082: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1083: A security hole exists in sendmail(8) that may allow an
1084: attacker on the local host to gain root privileges.</a>
1.294 david 1085: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1086: A kernel buffer overflow in the NFS code can be used to execute
1087: arbitrary code by users with mount privileges (only root by
1.181 millert 1088: default).</a>
1.294 david 1089: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1090: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1091: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1092: sshd(8) allows users to delete arbitrary files named "cookies"
1093: if X11 forwarding is enabled. X11 forwarding is disabled
1094: by default.</a>
1.294 david 1095: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1096: Programs using the fts routines can be tricked into changing
1097: into the wrong directory.</a>
1.294 david 1098: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1099: Sendmail signal handlers contain unsafe code,
1100: leading to numerous race conditions.</a>
1.173 deraadt 1101: </ul>
1102:
1103: <p>
1104: <li>
1.288 matthieu 1105: <a name="28"></a>
1.152 deraadt 1106:
1.294 david 1107: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1108: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1109: in <a href="anoncvs.html">OpenBSD current</a>. The
1110: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1111: you should update your machine.
1112:
1.152 deraadt 1113:
1114: <p>
1115: <ul>
1.294 david 1116: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1117: A security hole exists in uuxqt(8) that may allow an
1118: attacker to gain root privileges.</a>
1.294 david 1119: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1120: A security hole exists in lpd(8) that may allow an
1121: attacker to gain root privileges if lpd is running.</a>
1.294 david 1122: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1123: A security hole exists in sendmail(8) that may allow an
1124: attacker on the local host to gain root privileges.</a>
1.294 david 1125: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1126: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1127: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1128: Programs using the fts routines can be tricked into changing
1129: into the wrong directory.</a>
1.294 david 1130: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1131: Sendmail signal handlers contain unsafe code,
1132: leading to numerous race conditions.</a>
1.294 david 1133: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1134: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1135: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1136: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1137: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1138: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1139: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1140: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1141: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1142: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1143: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1144: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1145: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1146: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1147: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1148: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1149: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1150: rnd(4) did not use all of its input when written to.</a>
1.294 david 1151: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1152: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1153: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1154: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1155: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1156: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1157: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1158: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1159: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1160: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1161: </ul>
1162:
1163: <p>
1164: <li>
1.288 matthieu 1165: <a name="27"></a>
1.124 deraadt 1166:
1.294 david 1167: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1168: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1169: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1170: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1171:
1172: <p>
1173: <ul>
1.294 david 1174: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1175: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1176: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1177: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1178: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1179: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1180: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1181: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1182: (patch included)</a>
1.294 david 1183: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1184: X11 libraries have 2 potential overflows in xtrans code.
1185: (patch included)</a>
1.294 david 1186: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1187: Apache mod_rewrite and mod_vhost_alias modules could expose files
1188: on the server in certain configurations if used.
1189: (patch included)</a>
1.294 david 1190: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1191: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1192: TERMPATH and TERMCAP environment variables as it should.
1193: (patch included)</a>
1.294 david 1194: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1195: There are printf-style format string bugs in several privileged
1196: programs. (patch included)</a>
1.294 david 1197: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1198: libcurses honored terminal descriptions in the $HOME/.terminfo
1199: directory as well as in the TERMCAP environment variable for
1200: setuid and setgid applications.
1.146 deraadt 1201: (patch included)</a>
1.294 david 1202: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1203: A format string vulnerability exists in talkd(8).
1204: (patch included)</a>
1.294 david 1205: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1206: A format string vulnerability exists in the pw_error() function of the
1207: libutil library, yielding localhost root through chpass(1).
1208: (patch included)</a>
1.294 david 1209: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1210: Bad ESP/AH packets could cause a crash under certain conditions.
1211: (patch included)</a>
1.294 david 1212: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1213: A format string vulnerability (localhost root) exists in xlock(1).
1214: (patch included)</a>
1.294 david 1215: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1216: Various bugs found in X11 libraries have various side effects, almost
1217: completely denial of service in OpenBSD.
1218: (patch included)</a>
1.294 david 1219: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1220: Just like pretty much all the other unix ftp daemons
1221: on the planet, ftpd had a remote root hole in it.
1222: Luckily, ftpd was not enabled by default.
1.137 deraadt 1223: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1224: (patch included)</a>
1.294 david 1225: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1226: Mopd, very rarely used, contained some buffer overflows.
1227: (patch included)</a>
1.294 david 1228: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1229: libedit would check for a <b>.editrc</b> file in the current
1230: directory. Not known to be a real security issue, but a patch
1231: is available anyways.
1232: (patch included)</a>
1.294 david 1233: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1234: A serious bug in dhclient(8) could allow strings from a
1235: malicious dhcp server to be executed in the shell as root.
1236: (patch included)</a>
1.294 david 1237: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1238: A serious bug in isakmpd(8) policy handling wherein
1239: policy verification could be completely bypassed in isakmpd.
1240: (patch included)</a>
1.294 david 1241: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1242: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1243: should not be used, and results in security problems on
1244: other operating systems.</a>
1.294 david 1245: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1246: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1247: (patch included)</a>
1.294 david 1248: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1249: Improper use of ipf <i>keep-state</i> rules can result
1250: in firewall rules being bypassed. (patch included)</a>
1251:
1.124 deraadt 1252: </ul>
1253:
1254: <p>
1255: <li>
1.288 matthieu 1256: <a name="26"></a>
1.119 deraadt 1257:
1.294 david 1258: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1259: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1260: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1261: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1262:
1263: <p>
1264: <ul>
1.294 david 1265: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1266: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1267: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1268: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1269: Improper use of ipf <i>keep-state</i> rules can result
1270: in firewall rules being bypassed. (patch included)</a>
1.294 david 1271: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1272: xlockmore has a bug which a localhost attacker can use to gain
1273: access to the encrypted root password hash (which is normally
1.245 miod 1274: encoded using blowfish</a> (see
1.294 david 1275: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1276: crypt(3)</a>)
1.245 miod 1277: (patch included).
1.294 david 1278: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1279: Systems running with procfs enabled and mounted are
1280: vulnerable to a very tricky exploit. procfs is not
1281: mounted by default.
1282: (patch included).</a>
1.294 david 1283: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1284: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1285: thus exposing the system to a race where the aliases file
1286: did not exist.
1.119 deraadt 1287: (patch included).</a>
1.294 david 1288: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1289: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1290: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1291: A buffer overflow in the RSAREF code included in the
1292: USA version of libssl, is possibly exploitable in
1293: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1294: (patch included).<br></a>
1295: <strong>Update:</strong> Turns out that this was not exploitable
1296: in any of the software included in OpenBSD 2.6.
1.294 david 1297: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1298: Any user could change interface media configurations, resulting in
1299: a localhost denial of service attack.
1.121 deraadt 1300: (patch included).</a>
1.119 deraadt 1301: </ul>
1302:
1303: <p>
1304: <li>
1.288 matthieu 1305: <a name="25"></a>
1.106 deraadt 1306:
1.294 david 1307: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1308: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1309: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1310: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1311:
1.96 deraadt 1312: <p>
1.104 deraadt 1313: <ul>
1.294 david 1314: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1315: In cron(8), make sure argv[] is NULL terminated in the
1316: fake popen() and run sendmail as the user, not as root.
1317: (patch included).</a>
1.294 david 1318: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1319: filesystems had an overrun in their handling of uio_offset
1320: in their readdir() routines. (These filesystems are not
1321: enabled by default). (patch included).</a>
1.294 david 1322: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1323: when we execve() a new process. (patch included).</a>
1.294 david 1324: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1325: been handled by IPsec may be transmitted as cleartext.
1326: PF_KEY SA expirations may leak kernel resources.
1327: (patch included).</a>
1.294 david 1328: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1329: motd re-writing and change the find(1) to use -execdir
1330: (patch included).</a>
1.294 david 1331: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1332: users to chflags(2) or fchflags(2) on character or block devices
1333: which they may currently be the owner of (patch included).</a>
1.294 david 1334: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1335: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1336: </ul>
1337:
1.106 deraadt 1338: <p>
1339: <li>
1.288 matthieu 1340: <a name="24"></a>
1.235 miod 1341:
1.294 david 1342: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1343: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1344: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1345: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1346:
1.96 deraadt 1347: <p>
1.75 deraadt 1348: <ul>
1.294 david 1349: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1350: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1351: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1352: another kernel crash case caused by the <strong>crashme</strong>
1353: program (patch included).</a>
1.294 david 1354: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1355: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1356: (patch included).</a>
1.294 david 1357: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1358: existed in ping(8). (patch included).</a>
1.294 david 1359: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1360: the ipq, which could permit an attacker to cause a crash.
1361: (patch included).</a>
1.294 david 1362: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1363: kernel between accept(2) and select(2) could permit an attacker
1364: to hang sockets from remote.
1365: (patch included).</a>
1.294 david 1366: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1367: bog the machine excessively and cause problems.
1368: (patch included).</a>
1.294 david 1369: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1370: DDB interacted to possibly cause a crash.
1371: (patch included).</a>
1.294 david 1372: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1373: (patch included).</a>
1.294 david 1374: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1375: problem in bootpd(8). (patch included).</a>
1.294 david 1376: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1377: exploitable problem relating to environment variables in termcap
1378: and curses. (patch included).</a>
1.294 david 1379: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1380: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1381: </ul>
1382:
1.106 deraadt 1383: <p>
1384: <li>
1.288 matthieu 1385: <a name="23"></a>
1.235 miod 1386:
1.294 david 1387: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1388: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1389: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1390: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1391:
1.96 deraadt 1392: <p>
1.53 matthieu 1393: <ul>
1.294 david 1394: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1395: problem in bootpd(8). (patch included).</a>
1.294 david 1396: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1397: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1398: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1399: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1400: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1401: chpass(1) has a file descriptor leak which allows an
1402: attacker to modify /etc/master.passwd.</a>
1.294 david 1403: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1404: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1405: should not be executed with fd slots 0, 1, or 2 free.
1406: (patch included).</a>
1.294 david 1407: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1408: libraries (patches included).</a>
1.294 david 1409: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1410: processes too permissive (4th revision patch included).</a>
1.294 david 1411: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1412: of immutable and append-only file flags. (patch included).</a>
1.294 david 1413: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1414: if IPSEC is enabled (patch included).</a>
1.294 david 1415: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1416: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1417: </ul>
1.9 deraadt 1418:
1.106 deraadt 1419: <p>
1420: <li>
1.288 matthieu 1421: <a name="22"></a>
1.235 miod 1422:
1.294 david 1423: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1424: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1425: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1426: still exist in other operating systems. (The supplied patches are for
1427: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1428:
1.96 deraadt 1429: <p>
1.9 deraadt 1430: <ul>
1.294 david 1431: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1432: packets if IPSEC is enabled (patch included).</a>
1.294 david 1433: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1434: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1435: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1436: (patch included).</a>
1.294 david 1437: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1438: (patch included).</a>
1.294 david 1439: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1440: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1441: (patch included).</a>
1.294 david 1442: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1443: export (patch included).</a>
1.112 philen 1444: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1445: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1446: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1447: Acceptance.</a>
1.294 david 1448: A patch is available <a href="errata22.html#sourceroute">here</a>.
1449: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1450: flaw (patch included).</a>
1.294 david 1451: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1452: </ul>
1453:
1.106 deraadt 1454: <p>
1455: <li>
1.288 matthieu 1456: <a name="21"></a>
1.235 miod 1457:
1.294 david 1458: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1459: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1460: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1461: exist in other operating systems. (If you are running OpenBSD 2.1, we
1462: would strongly recommend an upgrade to the newest release, as this
1463: patch list only attempts at fixing the most important security
1464: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1465: security problems. Many of those problems were solved in ways which
1466: make it hard for us to provide patches).
1467:
1.96 deraadt 1468: <p>
1.52 deraadt 1469: <ul>
1.112 philen 1470: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1471: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1472: (patch included)</a>
1.112 philen 1473: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1474: </ul>
1.51 deraadt 1475:
1.106 deraadt 1476: <p>
1477: <li>
1.288 matthieu 1478: <a name="20"></a>
1.235 miod 1479:
1.294 david 1480: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1481: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1482: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1483: exist in other operating systems. (If you are running OpenBSD 2.0, we
1484: commend you for being there back in the old days!, but you're really
1485: missing out if you don't install a new version!)
1486:
1487: <p>
1488: <ul>
1.112 philen 1489: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1490: resolver (patch included)</a>
1491: <li>Many others... if people can hunt them down, please let me know
1492: and we'll put them up here.
1493: </ul>
1.51 deraadt 1494: <p>
1.106 deraadt 1495:
1.288 matthieu 1496: <a name="watching"></a>
1.294 david 1497: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1498:
1.21 deraadt 1499: Since we take a proactive stance with security, we are continually
1500: finding and fixing new security problems. Not all of these problems
1.80 espie 1501: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1502: confirmed to be exploitable; many simple bugs we fix do turn out to
1503: have security consequences we could not predict. We do not have the
1504: time resources to make these changes available in the above format.<p>
1.21 deraadt 1505:
1506: Thus there are usually minor security fixes in the current source code
1507: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1508: guarantee that these problems are of minimal impact and unproven
1.44 ian 1509: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1510: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1511:
1.45 deraadt 1512: People who are really concerned with security can do a number of
1513: things:<p>
1.21 deraadt 1514:
1515: <ul>
1516: <li>If you understand security issues, watch our
1.294 david 1517: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1518: eye out for things which appear security related. Since
1.21 deraadt 1519: exploitability is not proven for many of the fixes we make,
1520: do not expect the relevant commit message to say "SECURITY FIX!".
1521: If a problem is proven and serious, a patch will be available
1522: here very shortly after.
1.161 horacio 1523: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1524: security-announce mailing list</a> which will notify you for every
1.186 ian 1525: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1526: and instruct you on how to patch the problem.
1.21 deraadt 1527: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1528: complete system build from time to time (read /usr/src/Makefile
1529: carefully). Users can make the assumption that the current
1530: source tree always has stronger security than the previous release.
1.45 deraadt 1531: However, building your own system from source code is not trivial;
1.265 miod 1532: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1533: transition between major releases.
1.115 ericj 1534: <li>Install a binary snapshot for your
1.80 espie 1535: architecture, which are made available fairly often. For
1.29 deraadt 1536: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1537: </ul>
1538:
1.9 deraadt 1539: <p>
1.288 matthieu 1540: <a name="reporting"></a>
1.294 david 1541: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1542:
1.5 deraadt 1543: <p> If you find a new security problem, you can mail it to
1.294 david 1544: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1545: <br>
1.5 deraadt 1546: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1547: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1548:
1.107 deraadt 1549: <p>
1.288 matthieu 1550: <a name="papers"></a>
1.294 david 1551: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1552:
1553: A number of papers have been written by OpenBSD team members, about security
1554: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1555: documents are available as follows.<p>
1.107 deraadt 1556:
1557: <ul>
1.113 deraadt 1558: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1559: <a href="events.html#usenix99">Usenix 1999</a>,
1560: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1561: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1562: <a href="papers/bcrypt-paper.ps">paper</a> and
1563: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1564: <p>
1565: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1566: <a href="events.html#usenix99">Usenix 1999</a>,
1567: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1568: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1569: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1570: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1571: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1572: <a href="papers/crypt-paper.ps">paper</a> and
1573: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1574: <p>
1575: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1576: <a href="events.html#usenix99">Usenix 1999</a>,
1577: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1578: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1579: <a href="papers/strlcpy-paper.ps">paper</a> and
1580: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1581: <p>
1.118 deraadt 1582: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1583: <a href="events.html#lisa99">LISA 1999</a>,
1584: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1585: <a href="papers/authgw-paper.ps">paper</a> and
1586: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1587: <p>
1.153 jufi 1588: <li>Encrypting Virtual Memory<br>
1.294 david 1589: <a href="events.html#sec2000">Usenix Security 2000</a>,
1590: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1591: <a href="papers/swapencrypt.ps">paper</a> and
1592: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1593: <p>
1.107 deraadt 1594: </ul>
1.294 david 1595: </ul>
1.106 deraadt 1596:
1.2 deraadt 1597: <hr>
1.294 david 1598: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1599: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1600: <br>
1.349 ! deraadt 1601: <small>$OpenBSD: security.html,v 1.348 2007/09/07 23:01:59 merdely Exp $</small>
1.1 deraadt 1602:
1.24 deraadt 1603: </body>
1604: </html>
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