Annotation of www/security.html, Revision 1.351
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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>
1.351 ! okan 239: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
! 240: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 241: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 242: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 243: </ul>
244:
245: <li>
1.346 matthieu 246: <a name="41"></a>
247:
248: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
249: These are the OpenBSD 4.1 advisories -- all these problems are solved
250: in <a href=anoncvs.html>OpenBSD current</a> and the
251: <a href=stable.html>patch branch</a>.
252:
253: <p>
254: <ul>
1.350 deraadt 255: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 256: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 257: <li><a href="errata41.html#009_file">Jul 9, 2007:
258: Fix possible heap overflow in file(1).</a>
1.346 matthieu 259: <li><a href="errata41.html#005_route6">Apr 27, 2007:
260: IPv6 type 0 route headers can be used to mount a DoS attack
261: against hosts and networks.</a>
262: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
263: Multiple vulnerabilities in X.Org.</a>
264: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
265: Incorrect mbuf handling for ICMP6 packets.</a>
266: </ul>
267:
268: <li>
1.334 brad 269: <a name="40"></a>
270: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
271: These are the OpenBSD 4.0 advisories -- all these problems are solved
272: in <a href=anoncvs.html>OpenBSD current</a> and the
273: <a href=stable.html>patch branch</a>.
274:
275: <p>
276: <ul>
1.350 deraadt 277: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 278: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 279: <li><a href="errata40.html#015_file">Jul 9, 2007:
280: Fix possible heap overflow in file(1).</a>
1.343 deraadt 281: <li><a href="errata40.html#012_route6">Apr 23, 2007:
282: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 283: against hosts and networks.</a>
1.342 mbalmer 284: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
285: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 286: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
287: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 288: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 289: Insufficient validation in vga(4) may allow an attacker to gain
290: root privileges on some i386 systems.</a>
1.339 deraadt 291: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 292: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 293: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 294: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
295: found by Chris Evans.</a>
1.339 deraadt 296: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 297: Several problems have been found in OpenSSL.</a>
1.339 deraadt 298: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 299: httpd(8) does not sanitize the Expect header from an HTTP request
300: when it is reflected back in an error message, which might allow
301: cross-site scripting (XSS) style attacks.</a>
302: </ul>
303:
304: <li>
1.321 brad 305: <a name="39"></a>
306:
307: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
308: These are the OpenBSD 3.9 advisories -- all these problems are solved
309: in <a href=anoncvs.html>OpenBSD current</a> and the
310: <a href=stable.html>patch branch</a>.
311:
312: <p>
313: <ul>
1.343 deraadt 314: <li><a href="errata39.html#022_route6">Apr 23, 2007:
315: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 316: against hosts and networks.</a>
1.342 mbalmer 317: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
318: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 319: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
320: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 321: <li><a href="errata39.html#agp">Jan 3, 2007:
322: Insufficient validation in vga(4) may allow an attacker to gain
323: root privileges on some i386 systems.</a>
1.336 brad 324: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 325: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 326: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 327: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 328: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 329: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 330: found by Chris Evans.</a>
1.333 deraadt 331: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 332: Several problems have been found in OpenSSL.</a>
1.333 deraadt 333: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 334: httpd(8) does not sanitize the Expect header from an HTTP request
335: when it is reflected back in an error message, which might allow
336: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 337: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 338: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
339: possible for an attacker to construct an invalid signature which
340: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 341: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 342: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 343: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 344: Due to the failure to correctly validate LCP configuration option
345: lengths, it is possible for an attacker to send LCP packets via an
346: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 347: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 348: A problem in isakmpd(8) caused IPsec to run partly without replay
349: protection.</a>
1.333 deraadt 350: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 351: It is possible to cause the kernel to panic when more than the default
352: number of sempahores have been allocated.</a>
1.333 deraadt 353: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 354: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
355: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
356: option.</a>
1.333 deraadt 357: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 358: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 359: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 360: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
361: overflow.</a>
1.333 deraadt 362: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 363: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 364: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 365: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 366: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 367: A race condition has been reported to exist in the handling by sendmail
368: of asynchronous signals.</a>
369: </ul>
370:
1.338 miod 371: <p>
372: OpenBSD 3.8 and earlier releases are not supported anymore. The following
373: paragraphs only list advisories issued while they were maintained; these
374: releases are likely to be affected by the advisories for more recent releases.
375: <br>
376:
1.321 brad 377: <li>
1.318 deraadt 378: <a name="38"></a>
379:
380: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
381: These are the OpenBSD 3.8 advisories -- all these problems are solved
382: in <a href=anoncvs.html>OpenBSD current</a> and the
383: <a href=stable.html>patch branch</a>.
384:
385: <p>
386: <ul>
1.332 brad 387: <li><a href="errata38.html#ssh2">Oct 12, 2006:
388: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 389: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 390: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 391: found by Chris Evans.</a>
392: <li><a href="errata38.html#openssl2">Oct 7, 2006:
393: Several problems have been found in OpenSSL.</a>
394: <li><a href="errata38.html#httpd2">Oct 7, 2006:
395: httpd(8) does not sanitize the Expect header from an HTTP request
396: when it is reflected back in an error message, which might allow
397: cross-site scripting (XSS) style attacks.</a>
1.329 brad 398: <li><a href="errata38.html#openssl">Sep 8, 2006:
399: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
400: possible for an attacker to construct an invalid signature which
401: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 402: <li><a href="errata38.html#bind">Sep 8, 2006:
403: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 404: <li><a href="errata38.html#sppp">Sep 2, 2006:
405: Due to the failure to correctly validate LCP configuration option
406: lengths, it is possible for an attacker to send LCP packets via an
407: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 408: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
409: A problem in isakmpd(8) caused IPsec to run partly without replay
410: protection.</a>
411: <li><a href="errata38.html#sem">Aug 25, 2006:
412: It is possible to cause the kernel to panic when more than the default
413: number of sempahores have been allocated.</a>
414: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
415: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
416: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
417: option.</a>
418: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
419: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 420: <li><a href="errata38.html#httpd">Jul 30, 2006:
421: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
422: overflow.</a>
1.324 brad 423: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
424: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 425: <li><a href="errata38.html#xorg">May 2, 2006:
426: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 427: <li><a href="errata38.html#sendmail">Mar 25, 2006:
428: A race condition has been reported to exist in the handling by sendmail
429: of asynchronous signals.</a>
430: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 431: Josh Bressers has reported a weakness in OpenSSH caused due to the
432: insecure use of the system(3) function in scp(1) when performing copy
433: operations using filenames that are supplied by the user from the
434: command line.</a>
1.321 brad 435: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 436: Do not allow users to trick suid programs into re-opening files via
437: /dev/fd.</a>
1.321 brad 438: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 439: A buffer overflow has been found in the Perl interpreter with the
440: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 441: </ul>
442:
443: <li>
1.312 david 444: <a name="37"></a>
445:
446: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
447: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 448: in <a href="anoncvs.html">OpenBSD current</a>. The
449: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
450: you should update your machine.
1.312 david 451:
452: <p>
453: <ul>
1.322 brad 454: <li><a href="errata37.html#xorg">May 2, 2006:
455: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 456: <li><a href="errata37.html#sendmail">Mar 25, 2006:
457: A race condition has been reported to exist in the handling by sendmail
458: of asynchronous signals.</a>
1.320 brad 459: <li><a href="errata37.html#ssh">Feb 12, 2006:
460: Josh Bressers has reported a weakness in OpenSSH caused due to the
461: insecure use of the system(3) function in scp(1) when performing copy
462: operations using filenames that are supplied by the user from the
463: command line.</a>
1.319 brad 464: <li><a href="errata37.html#fd">Jan 5, 2006:
465: Do not allow users to trick suid programs into re-opening files via
466: /dev/fd.</a>
467: <li><a href="errata37.html#perl">Jan 5, 2006:
468: A buffer overflow has been found in the Perl interpreter with the
469: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 470: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 471: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 472: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 473: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 474: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 475: Fix a race condition in sudo(8) that could allow a user
1.315 millert 476: to run arbitrary commands.</a>
1.318 deraadt 477: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 478: Fix a buffer overflow, memory leaks, and NULL pointer
479: dereference in cvs(1).</a>
1.312 david 480: </ul>
481:
482: <li>
1.301 miod 483: <a name="36"></a>
484:
485: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
486: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 487: in <a href="anoncvs.html">OpenBSD current</a>. The
488: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
489: you should update your machine.
1.301 miod 490:
491: <p>
1.302 markus 492: <ul>
1.317 millert 493: <li><a href="errata36.html#libz2">Jul 21, 2005:
494: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 495: <li><a href="errata36.html#libz">Jul 6, 2005:
496: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 497: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 498: Fix a race condition in sudo(8) that could allow a user
1.315 millert 499: to run arbitrary commands.</a>
1.311 deraadt 500: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 501: Fix a buffer overflow, memory leaks, and NULL pointer
502: dereference in cvs(1).</a>
1.311 deraadt 503: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 504: Due to buffer overflows in telnet(1), a malicious
505: server or man-in-the-middle attack could allow
506: execution of arbitrary code with the privileges of
507: the user invoking telnet(1).</a>
1.311 deraadt 508: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 509: More stringent checking should be done in the copy(9)
510: functions to prevent their misuse.</a>
1.311 deraadt 511: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 512: More stringent checking should be done in the copy(9)
513: functions to prevent their misuse.</a>
1.311 deraadt 514: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 515: httpd(8)'s mod_include module fails to properly validate
516: the length of user supplied tag strings prior to copying
1.305 brad 517: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 518: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 519: On systems running isakmpd(8) it is possible for a local
520: user to cause kernel memory corruption and system panic by
1.303 markus 521: setting ipsec(4) credentials on a socket.</a>
1.302 markus 522: </ul>
1.301 miod 523:
524: <li>
1.288 matthieu 525: <a name="35"></a>
1.279 deraadt 526:
1.294 david 527: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 528: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 529: in <a href="anoncvs.html">OpenBSD current</a>. The
530: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
531: you should update your machine.
1.279 deraadt 532:
533: <p>
534: <ul>
1.310 brad 535: <li><a href="errata35.html#cvs4">Apr 28, 2005:
536: Fix a buffer overflow, memory leaks, and NULL pointer
537: dereference in cvs(1).</a>
1.309 brad 538: <li><a href="errata35.html#telnet">Mar 30, 2005:
539: Due to buffer overflows in telnet(1), a malicious
540: server or man-in-the-middle attack could allow
541: execution of arbitrary code with the privileges of
542: the user invoking telnet(1).</a>
1.308 brad 543: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 544: More stringent checking should be done in the copy(9)
545: functions to prevent their misuse.</a>
1.306 brad 546: <li><a href="errata35.html#locore">Feb 28, 2005:
547: More stringent checking should be done in the copy(9)
548: functions to prevent their misuse.</a>
1.304 brad 549: <li><a href="errata35.html#httpd3">Jan 12, 2005:
550: httpd(8)'s mod_include module fails to properly validate
551: the length of user supplied tag strings prior to copying
1.305 brad 552: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 553: <li><a href="errata35.html#pfkey">Dec 14, 2004:
554: On systems running isakmpd(8) it is possible for a local
555: user to cause kernel memory corruption and system panic by
1.303 markus 556: setting ipsec(4) credentials on a socket.</a>
1.301 miod 557: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 558: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 559: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 560: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 561: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 562: httpd(8)'s mod_rewrite module can be made to write one zero byte in
563: an arbitrary memory position outside of a char array, causing a DoS
564: or possibly buffer overflows.</a>
1.301 miod 565: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 566: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 567: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 568: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 569: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 570: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 571: Multiple remote vulnerabilities have been found in the cvs(1)
572: server which can be used by CVS clients to crash or execute
1.293 brad 573: arbitrary code on the server.</a>
1.301 miod 574: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 575: kdc(8) performs inadequate checking of request fields, leading
576: to the possibility of principal impersonation from other
577: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 578: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 579: xdm(1) ignores the requestPort resource and creates a
1.293 brad 580: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 581: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 582: A buffer overflow in the cvs(1) server has been found,
583: which can be used by CVS clients to execute arbitrary code on
1.293 brad 584: the server.</a>
1.301 miod 585: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 586: Integer overflow problems were found in procfs, allowing
1.293 brad 587: reading of arbitrary kernel memory.</a>
1.301 miod 588: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 589: Pathname validation problems have been found in cvs(1),
590: allowing clients and servers access to files outside the
1.293 brad 591: repository or local CVS tree.</a>
1.279 deraadt 592: </ul>
593:
594: <p>
595: <li>
1.288 matthieu 596: <a name="34"></a>
1.261 david 597:
1.294 david 598: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 599: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 600: in <a href="anoncvs.html">OpenBSD current</a>. The
601: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
602: you should update your machine.
1.261 david 603: <p>
604: <ul>
1.302 markus 605: <li><a href="errata34.html#pfkey">Dec 14, 2004:
606: On systems running isakmpd(8) it is possible for a local
607: user to cause kernel memory corruption and system panic by
1.303 markus 608: setting ipsec(4) credentials on a socket.</a>
1.298 brad 609: <li><a href="errata34.html#xpm">Sep 16, 2004:
610: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 611: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
612: httpd(8)'s mod_rewrite module can be made to write one zero byte in
613: an arbitrary memory position outside of a char array, causing a DoS
614: or possibly buffer overflows.</a>
1.294 david 615: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 616: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 617: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 618: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 619: an attacker can delete IPsec tunnels at will.</a>
1.294 david 620: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 621: Multiple remote vulnerabilities have been found in the cvs(1)
622: server which can be used by CVS clients to crash or execute
1.293 brad 623: arbitrary code on the server.</a>
1.294 david 624: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 625: kdc(8) performs inadequate checking of request fields, leading
626: to the possibility of principal impersonation from other
627: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 628: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 629: A buffer overflow in the cvs(1) server has been found,
630: which can be used by CVS clients to execute arbitrary code on
631: the server.</a>
1.294 david 632: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 633: Integer overflow problems were found in procfs, allowing
634: reading of arbitrary kernel memory.</a>
1.294 david 635: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 636: Pathname validation problems have been found in cvs(1),
637: allowing clients and servers access to files outside the
638: repository or local CVS tree.</a>
1.294 david 639: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 640: A missing check for a NULL-pointer dereference may allow a
1.281 otto 641: remote attacker to crash applications using OpenSSL.</a>
1.294 david 642: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 643: Defects in the payload validation and processing functions of
644: isakmpd have been discovered. An attacker could send malformed
645: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 646: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 647: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
648: access module, using IP addresses without a netmask on big endian
649: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 650: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 651: An IPv6 MTU handling problem exists that could be used by an
652: attacker to cause a denial of service attack.</a>
1.294 david 653: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 654: A reference counting bug in shmat(2) could be used to write to
655: kernel memory under certain circumstances.</a>
1.294 david 656: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 657: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 658: by Thomas Walpuski.</a>
1.294 david 659: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 660: It may be possible for a local user to overrun the stack in
661: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 662: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 663: The use of certain ASN.1 encodings or malformed public keys may
664: allow an attacker to mount a denial of service attack against
665: applications linked with ssl(3).</a>
1.261 david 666: </ul>
667:
668: <li>
1.288 matthieu 669: <a name="33"></a>
1.246 deraadt 670:
1.294 david 671: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 672: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 673: in <a href="anoncvs.html">OpenBSD current</a>. The
674: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 675: you should update your machine.
1.246 deraadt 676: <p>
677: <ul>
1.294 david 678: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 679: Pathname validation problems have been found in cvs(1),
680: allowing clients and servers access to files outside the
681: repository or local CVS tree.</a>
1.294 david 682: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 683: A missing check for a NULL-pointer dereference may allow a
1.281 otto 684: remote attacker to crash applications using OpenSSL.</a>
1.294 david 685: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 686: Defects in the payload validation and processing functions of
687: isakmpd have been discovered. An attacker could send malformed
688: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 689: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 690: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
691: access module, using IP addresses without a netmask on big endian
692: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 693: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 694: An IPv6 MTU handling problem exists that could be used by an
695: attacker to cause a denial of service attack.</a>
1.294 david 696: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 697: A reference counting bug in shmat(2) could be used to write to
698: kernel memory under certain circumstances.</a>
1.294 david 699: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 700: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 701: by Thomas Walpuski.</a>
1.294 david 702: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 703: It may be possible for a local user to execute arbitrary code
704: resulting in escalation of privileges due to a stack overrun
705: in compat_ibcs2(8).</a>
1.294 david 706: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 707: The use of certain ASN.1 encodings or malformed public keys may
708: allow an attacker to mount a denial of service attack against
709: applications linked with ssl(3).</a>
1.294 david 710: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 711: Access of freed memory in pf(4) could be used to
1.260 margarid 712: remotely panic a machine using scrub rules.</a>
1.294 david 713: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 714: A buffer overflow in the address parsing in
715: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 716: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 717: OpenSSH versions prior to 3.7 contains a buffer management error
718: that is potentially exploitable.</a>
1.294 david 719: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 720: Root may be able to reduce the security level by taking advantage of
721: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 722: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 723: An improper bounds check in the kernel may allow a local user
724: to panic the kernel.</a>
1.294 david 725: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 726: An off-by-one error exists in the C library function realpath(3)
727: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 728: </ul>
729:
1.265 miod 730:
1.247 david 731: <p>
1.246 deraadt 732: <li>
1.288 matthieu 733: <a name="32"></a>
1.224 deraadt 734:
1.294 david 735: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 736: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 737: in <a href="anoncvs.html">OpenBSD current</a>. The
738: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 739: you should update your machine.
1.224 deraadt 740: <p>
741: <ul>
1.294 david 742: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 743: The use of certain ASN.1 encodings or malformed public keys may
744: allow an attacker to mount a denial of service attack against
745: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 746: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 747: Access of freed memory in pf(4) could be used to
1.260 margarid 748: remotely panic a machine using scrub rules.</a>
1.294 david 749: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 750: A buffer overflow in the address parsing in
751: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 752: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 753: OpenSSH versions prior to 3.7 contains a buffer management error
754: that is potentially exploitable.</a>
1.294 david 755: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 756: Fix for a potential security issue in
757: sendmail(8) with respect to DNS maps.</a>
1.294 david 758: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 759: An off-by-one error exists in the C library function realpath(3)
760: may allow an attacker to gain escalated privileges.</a>
1.294 david 761: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 762: A buffer overflow in the address parsing in
763: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 764: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 765: A cryptographic weaknesses in the Kerberos v4 protocol can be
766: exploited on Kerberos v5 as well.</a>
1.294 david 767: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 768: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 769: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 770: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 771: Various SSL and TLS operations in OpenSSL are vulnerable to
772: timing attacks.</a>
1.294 david 773: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 774: A buffer overflow in lprm(1) may allow an attacker to elevate
775: privileges to user daemon.</a>.
1.294 david 776: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 777: A buffer overflow in the envelope comments processing in
778: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 779: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 780: httpd(8) leaks file inode numbers via ETag header as well as
781: child PIDs in multipart MIME boundary generation. This could
782: lead, for example, to NFS exploitation because it uses inode
783: numbers as part of the file handle.</a>
1.294 david 784: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 785: In ssl(8) an information leak can occur via timing by performing
786: a MAC computation even if incorrect block cipher padding has
787: been found, this is a countermeasure. Also, check for negative
788: sizes, in allocation routines.</a>
1.294 david 789: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 790: A double free exists in cvs(1) that could lead to privilege
791: escalation for cvs configurations where the cvs command is
1.233 margarid 792: run as a privileged user.</a>
1.294 david 793: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 794: A buffer overflow exists in named(8) that could lead to a
795: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 796: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 797: A logic error in the pool kernel memory allocator could cause
798: memory corruption in low-memory situations, causing the system
799: to crash.</a>
1.294 david 800: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 801: An attacker can bypass smrsh(8)'s restrictions and execute
802: arbitrary commands with the privileges of his own account.</a>
1.294 david 803: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 804: Network bridges running pf with scrubbing enabled could cause
805: mbuf corruption, causing the system to crash.</a>
1.294 david 806: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 807: A buffer overflow can occur in the kadmind(8) daemon, leading
808: to possible remote crash or exploit.</a>
1.224 deraadt 809: </ul>
810:
1.227 miod 811: <p>
812: <li>
1.288 matthieu 813: <a name="31"></a>
1.203 deraadt 814:
1.294 david 815: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 816: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 817: in <a href="anoncvs.html">OpenBSD current</a>. The
818: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 819: you should update your machine.
1.203 deraadt 820:
821: <p>
822: <ul>
1.294 david 823: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 824: A buffer overflow in the address parsing in
825: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 826: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 827: A cryptographic weaknesses in the Kerberos v4 protocol can be
828: exploited on Kerberos v5 as well.</a>
1.294 david 829: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 830: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 831: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 832: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 833: Various SSL and TLS operations in OpenSSL are vulnerable to
834: timing attacks.</a>
1.294 david 835: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 836: A buffer overflow in lprm(1) may allow an attacker to gain
837: root privileges.</a>
1.294 david 838: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 839: A buffer overflow in the envelope comments processing in
840: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 841: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 842: In ssl(8) an information leak can occur via timing by performing
843: a MAC computation even if incorrect block cipher padding has
844: been found, this is a countermeasure. Also, check for negative
845: sizes, in allocation routines.</a>
1.294 david 846: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 847: A double free exists in cvs(1) that could lead to privilege
848: escalation for cvs configurations where the cvs command is
1.294 david 849: run as a privileged user</a>.
850: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 851: A buffer overflow exists in named(8) that could lead to a
852: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 853: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 854: Incorrect argument checking in the getitimer(2) system call
855: may allow an attacker to crash the system.</a>
1.294 david 856: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 857: An attacker can bypass smrsh(8)'s restrictions and execute
858: arbitrary commands with the privileges of his own account.</a>
1.294 david 859: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 860: A buffer overflow can occur in the kadmind(8) daemon, leading
861: to possible remote crash or exploit.</a>
1.294 david 862: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 863: Incorrect argument checking in the setitimer(2) system call
864: may allow an attacker to write to kernel memory.</a>
1.294 david 865: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 866: An insufficient boundary check in the select system call
1.220 miod 867: allows an attacker to overwrite kernel memory and execute arbitrary code
868: in kernel context.</a>
1.294 david 869: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 870: Several remote buffer overflows can occur in the SSL2 server and SSL3
871: client of the ssl(8) library, as in the ASN.1 parser code in the
872: crypto(3) library, all of them being potentially remotely
873: exploitable.</a>
1.294 david 874: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 875: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
876: possible remote crash.</a>
1.294 david 877: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 878: A race condition exists in the pppd(8) daemon which may cause it to
879: alter the file permissions of an arbitrary file.</a>
1.294 david 880: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 881: Receiving IKE payloads out of sequence can cause isakmpd(8) to
882: crash.</a>
1.294 david 883: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 884: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 885: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 886: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 887: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 888: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 889: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 890: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 891: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 892: input validation error that can result in an integer overflow and
893: privilege escalation.</a>
1.294 david 894: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 895: A buffer overflow can occur during the interpretation of chunked
896: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 897: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 898: Under certain conditions, on systems using YP with netgroups
899: in the password database, it is possible that sshd(8) does
900: ACL checks for the requested user name but uses the password
901: database entry of a different user for authentication. This
902: means that denied users might authenticate successfully
903: while permitted users could be locked out.</a>
1.294 david 904: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 905: A race condition exists that could defeat the kernel's
906: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 907: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 908: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 909: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 910: A local user can gain super-user privileges due to a buffer
911: overflow in sshd(8) if AFS has been configured on the system
912: or if KerberosTgtPassing or AFSTokenPassing has been enabled
913: in the sshd_config file.</a>
1.203 deraadt 914: </ul>
915:
1.235 miod 916: <p>
1.203 deraadt 917: <li>
1.288 matthieu 918: <a name="30"></a>
1.187 deraadt 919:
1.294 david 920: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 921: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 922: in <a href="anoncvs.html">OpenBSD current</a>. The
923: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 924: you should update your machine.
1.187 deraadt 925:
926: <p>
927: <ul>
1.294 david 928: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 929: A buffer overflow exists in named(8) that could lead to a
930: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 931: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 932: Incorrect argument checking in the getitimer(2) system call
933: may allow an attacker to crash the system.</a>
1.294 david 934: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 935: An attacker can bypass smrsh(8)'s restrictions and execute
936: arbitrary commands with the privileges of his own account.</a>
1.294 david 937: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 938: A buffer overflow can occur in the kadmind(8) daemon, leading
939: to possible remote crash or exploit.</a>
1.294 david 940: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 941: Incorrect argument checking in the setitimer(2) system call
942: may allow an attacker to write to kernel memory.</a>
1.294 david 943: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 944: An insufficient boundary check in the select and poll system calls
945: allows an attacker to overwrite kernel memory and execute arbitrary code
946: in kernel context.</a>
1.294 david 947: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 948: Several remote buffer overflows can occur in the SSL2 server and SSL3
949: client of the ssl(8) library, as in the ASN.1 parser code in the
950: crypto(3) library, all of them being potentially remotely
951: exploitable.</a>
1.294 david 952: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 953: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
954: possible remote crash.</a>
1.294 david 955: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 956: A race condition exists in the pppd(8) daemon which may cause it to
957: alter the file permissions of an arbitrary file.</a>
1.294 david 958: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 959: Receiving IKE payloads out of sequence can cause isakmpd(8) to
960: crash.</a>
1.294 david 961: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 962: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 963: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 964: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 965: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 966: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 967: input validation error that can result in an integer overflow and
968: privilege escalation.</a>
1.294 david 969: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 970: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 971: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 972: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 973: A buffer overflow can occur during the interpretation of chunked
974: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 975: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 976: A race condition exists that could defeat the kernel's
977: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 978: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 979: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 980: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 981: A local user can gain super-user privileges due to a buffer
982: overflow in sshd(8) if AFS has been configured on the system
983: or if KerberosTgtPassing or AFSTokenPassing has been enabled
984: in the sshd_config file.</a>
1.294 david 985: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 986: The mail(1) was interpreting tilde escapes even when invoked
987: in non-interactive mode. As mail(1) is called as root from cron,
988: this can lead to a local root compromise.</a>
1.294 david 989: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 990: Under certain conditions, on systems using YP with netgroups in
991: the password database, it is possible for the rexecd(8) and rshd(8)
992: daemons to execute a shell from a password database entry for a
993: different user. Similarly, atrun(8) may change to the wrong
994: home directory when running jobs.</a>
1.294 david 995: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 996: A potential double free() exists in the zlib library;
997: this is not exploitable on OpenBSD.
998: The kernel also contains a copy of zlib; it is not
999: currently known if the kernel zlib is exploitable.</a>
1.294 david 1000: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1001: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1002: may allow a local user to gain super-user privileges.</a>
1.294 david 1003: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1004: A race condition between the ptrace(2) and execve(2) system calls
1005: allows an attacker to modify the memory contents of suid/sgid
1006: processes which could lead to compromise of the super-user account.</a>
1.294 david 1007: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1008: There is a security hole in sudo(8) that can be exploited
1009: when the Postfix sendmail replacement is installed that may
1010: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1011: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1012: An attacker can trick a machine running the lpd daemon into
1013: creating new files in the root directory from a machine with
1014: remote line printer access.</a>
1.294 david 1015: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1016: The vi.recover script can be abused in such a way as
1017: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1018: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1019: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1020: resulting in a crash.</a>
1.294 david 1021: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1022: A security hole that may allow an attacker to partially authenticate
1023: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1024: </ul>
1025:
1026: <p>
1027: <li>
1.288 matthieu 1028: <a name="29"></a>
1.173 deraadt 1029:
1.294 david 1030: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1031: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1032: in <a href="anoncvs.html">OpenBSD current</a>. The
1033: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1034: you should update your machine.
1035:
1.173 deraadt 1036:
1037: <p>
1038: <ul>
1.294 david 1039: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1040: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1041: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1042: A race condition exists that could defeat the kernel's
1043: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1044: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1045: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1046: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1047: A local user can gain super-user privileges due to a buffer
1048: overflow in sshd(8) if AFS has been configured on the system
1049: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1050: in the sshd_config file.</a>
1.294 david 1051: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1052: The mail(1) was interpreting tilde escapes even when invoked
1053: in non-interactive mode. As mail(1) is called as root from cron,
1054: this can lead to a local root compromise.</a>
1.294 david 1055: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1056: A potential double free() exists in the zlib library;
1057: this is not exploitable on OpenBSD.
1058: The kernel also contains a copy of zlib; it is not
1059: currently known if the kernel zlib is exploitable.</a>
1.294 david 1060: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1061: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1062: may allow a local user to gain super-user privileges.</a>
1.294 david 1063: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1064: A race condition between the ptrace(2) and execve(2) system calls
1065: allows an attacker to modify the memory contents of suid/sgid
1066: processes which could lead to compromise of the super-user account.</a>
1.294 david 1067: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1068: There is a security hole in sudo(8) that can be exploited
1069: when the Postfix sendmail replacement is installed that may
1070: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1071: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1072: An attacker can trick a machine running the lpd daemon into
1073: creating new files in the root directory from a machine with
1074: remote line printer access.</a>
1.294 david 1075: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1076: The vi.recover script can be abused in such a way as
1077: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1078: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1079: A security hole exists in uuxqt(8) that may allow an
1080: attacker to gain root privileges.</a>
1.294 david 1081: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1082: A security hole exists in lpd(8) that may allow an
1083: attacker to gain root privileges if lpd is running.</a>
1.294 david 1084: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1085: A security hole exists in sendmail(8) that may allow an
1086: attacker on the local host to gain root privileges.</a>
1.294 david 1087: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1088: A kernel buffer overflow in the NFS code can be used to execute
1089: arbitrary code by users with mount privileges (only root by
1.181 millert 1090: default).</a>
1.294 david 1091: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1092: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1093: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1094: sshd(8) allows users to delete arbitrary files named "cookies"
1095: if X11 forwarding is enabled. X11 forwarding is disabled
1096: by default.</a>
1.294 david 1097: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1098: Programs using the fts routines can be tricked into changing
1099: into the wrong directory.</a>
1.294 david 1100: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1101: Sendmail signal handlers contain unsafe code,
1102: leading to numerous race conditions.</a>
1.173 deraadt 1103: </ul>
1104:
1105: <p>
1106: <li>
1.288 matthieu 1107: <a name="28"></a>
1.152 deraadt 1108:
1.294 david 1109: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1110: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1111: in <a href="anoncvs.html">OpenBSD current</a>. The
1112: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1113: you should update your machine.
1114:
1.152 deraadt 1115:
1116: <p>
1117: <ul>
1.294 david 1118: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1119: A security hole exists in uuxqt(8) that may allow an
1120: attacker to gain root privileges.</a>
1.294 david 1121: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1122: A security hole exists in lpd(8) that may allow an
1123: attacker to gain root privileges if lpd is running.</a>
1.294 david 1124: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1125: A security hole exists in sendmail(8) that may allow an
1126: attacker on the local host to gain root privileges.</a>
1.294 david 1127: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1128: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1129: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1130: Programs using the fts routines can be tricked into changing
1131: into the wrong directory.</a>
1.294 david 1132: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1133: Sendmail signal handlers contain unsafe code,
1134: leading to numerous race conditions.</a>
1.294 david 1135: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1136: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1137: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1138: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1139: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1140: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1141: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1142: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1143: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1144: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1145: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1146: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1147: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1148: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1149: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1150: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1151: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1152: rnd(4) did not use all of its input when written to.</a>
1.294 david 1153: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1154: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1155: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1156: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1157: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1158: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1159: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1160: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1161: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1162: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1163: </ul>
1164:
1165: <p>
1166: <li>
1.288 matthieu 1167: <a name="27"></a>
1.124 deraadt 1168:
1.294 david 1169: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1170: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1171: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1172: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1173:
1174: <p>
1175: <ul>
1.294 david 1176: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1177: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1178: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1179: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1180: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1181: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1182: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1183: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1184: (patch included)</a>
1.294 david 1185: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1186: X11 libraries have 2 potential overflows in xtrans code.
1187: (patch included)</a>
1.294 david 1188: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1189: Apache mod_rewrite and mod_vhost_alias modules could expose files
1190: on the server in certain configurations if used.
1191: (patch included)</a>
1.294 david 1192: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1193: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1194: TERMPATH and TERMCAP environment variables as it should.
1195: (patch included)</a>
1.294 david 1196: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1197: There are printf-style format string bugs in several privileged
1198: programs. (patch included)</a>
1.294 david 1199: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1200: libcurses honored terminal descriptions in the $HOME/.terminfo
1201: directory as well as in the TERMCAP environment variable for
1202: setuid and setgid applications.
1.146 deraadt 1203: (patch included)</a>
1.294 david 1204: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1205: A format string vulnerability exists in talkd(8).
1206: (patch included)</a>
1.294 david 1207: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1208: A format string vulnerability exists in the pw_error() function of the
1209: libutil library, yielding localhost root through chpass(1).
1210: (patch included)</a>
1.294 david 1211: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1212: Bad ESP/AH packets could cause a crash under certain conditions.
1213: (patch included)</a>
1.294 david 1214: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1215: A format string vulnerability (localhost root) exists in xlock(1).
1216: (patch included)</a>
1.294 david 1217: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1218: Various bugs found in X11 libraries have various side effects, almost
1219: completely denial of service in OpenBSD.
1220: (patch included)</a>
1.294 david 1221: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1222: Just like pretty much all the other unix ftp daemons
1223: on the planet, ftpd had a remote root hole in it.
1224: Luckily, ftpd was not enabled by default.
1.137 deraadt 1225: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1226: (patch included)</a>
1.294 david 1227: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1228: Mopd, very rarely used, contained some buffer overflows.
1229: (patch included)</a>
1.294 david 1230: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1231: libedit would check for a <b>.editrc</b> file in the current
1232: directory. Not known to be a real security issue, but a patch
1233: is available anyways.
1234: (patch included)</a>
1.294 david 1235: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1236: A serious bug in dhclient(8) could allow strings from a
1237: malicious dhcp server to be executed in the shell as root.
1238: (patch included)</a>
1.294 david 1239: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1240: A serious bug in isakmpd(8) policy handling wherein
1241: policy verification could be completely bypassed in isakmpd.
1242: (patch included)</a>
1.294 david 1243: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1244: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1245: should not be used, and results in security problems on
1246: other operating systems.</a>
1.294 david 1247: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1248: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1249: (patch included)</a>
1.294 david 1250: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1251: Improper use of ipf <i>keep-state</i> rules can result
1252: in firewall rules being bypassed. (patch included)</a>
1253:
1.124 deraadt 1254: </ul>
1255:
1256: <p>
1257: <li>
1.288 matthieu 1258: <a name="26"></a>
1.119 deraadt 1259:
1.294 david 1260: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1261: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1262: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1263: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1264:
1265: <p>
1266: <ul>
1.294 david 1267: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1268: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1269: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1270: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1271: Improper use of ipf <i>keep-state</i> rules can result
1272: in firewall rules being bypassed. (patch included)</a>
1.294 david 1273: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1274: xlockmore has a bug which a localhost attacker can use to gain
1275: access to the encrypted root password hash (which is normally
1.245 miod 1276: encoded using blowfish</a> (see
1.294 david 1277: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1278: crypt(3)</a>)
1.245 miod 1279: (patch included).
1.294 david 1280: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1281: Systems running with procfs enabled and mounted are
1282: vulnerable to a very tricky exploit. procfs is not
1283: mounted by default.
1284: (patch included).</a>
1.294 david 1285: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1286: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1287: thus exposing the system to a race where the aliases file
1288: did not exist.
1.119 deraadt 1289: (patch included).</a>
1.294 david 1290: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1291: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1292: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1293: A buffer overflow in the RSAREF code included in the
1294: USA version of libssl, is possibly exploitable in
1295: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1296: (patch included).<br></a>
1297: <strong>Update:</strong> Turns out that this was not exploitable
1298: in any of the software included in OpenBSD 2.6.
1.294 david 1299: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1300: Any user could change interface media configurations, resulting in
1301: a localhost denial of service attack.
1.121 deraadt 1302: (patch included).</a>
1.119 deraadt 1303: </ul>
1304:
1305: <p>
1306: <li>
1.288 matthieu 1307: <a name="25"></a>
1.106 deraadt 1308:
1.294 david 1309: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1310: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1311: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1312: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1313:
1.96 deraadt 1314: <p>
1.104 deraadt 1315: <ul>
1.294 david 1316: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1317: In cron(8), make sure argv[] is NULL terminated in the
1318: fake popen() and run sendmail as the user, not as root.
1319: (patch included).</a>
1.294 david 1320: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1321: filesystems had an overrun in their handling of uio_offset
1322: in their readdir() routines. (These filesystems are not
1323: enabled by default). (patch included).</a>
1.294 david 1324: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1325: when we execve() a new process. (patch included).</a>
1.294 david 1326: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1327: been handled by IPsec may be transmitted as cleartext.
1328: PF_KEY SA expirations may leak kernel resources.
1329: (patch included).</a>
1.294 david 1330: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1331: motd re-writing and change the find(1) to use -execdir
1332: (patch included).</a>
1.294 david 1333: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1334: users to chflags(2) or fchflags(2) on character or block devices
1335: which they may currently be the owner of (patch included).</a>
1.294 david 1336: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1337: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1338: </ul>
1339:
1.106 deraadt 1340: <p>
1341: <li>
1.288 matthieu 1342: <a name="24"></a>
1.235 miod 1343:
1.294 david 1344: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1345: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1346: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1347: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1348:
1.96 deraadt 1349: <p>
1.75 deraadt 1350: <ul>
1.294 david 1351: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1352: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1353: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1354: another kernel crash case caused by the <strong>crashme</strong>
1355: program (patch included).</a>
1.294 david 1356: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1357: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1358: (patch included).</a>
1.294 david 1359: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1360: existed in ping(8). (patch included).</a>
1.294 david 1361: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1362: the ipq, which could permit an attacker to cause a crash.
1363: (patch included).</a>
1.294 david 1364: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1365: kernel between accept(2) and select(2) could permit an attacker
1366: to hang sockets from remote.
1367: (patch included).</a>
1.294 david 1368: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1369: bog the machine excessively and cause problems.
1370: (patch included).</a>
1.294 david 1371: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1372: DDB interacted to possibly cause a crash.
1373: (patch included).</a>
1.294 david 1374: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1375: (patch included).</a>
1.294 david 1376: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1377: problem in bootpd(8). (patch included).</a>
1.294 david 1378: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1379: exploitable problem relating to environment variables in termcap
1380: and curses. (patch included).</a>
1.294 david 1381: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1382: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1383: </ul>
1384:
1.106 deraadt 1385: <p>
1386: <li>
1.288 matthieu 1387: <a name="23"></a>
1.235 miod 1388:
1.294 david 1389: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1390: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1391: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1392: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1393:
1.96 deraadt 1394: <p>
1.53 matthieu 1395: <ul>
1.294 david 1396: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1397: problem in bootpd(8). (patch included).</a>
1.294 david 1398: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1399: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1400: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1401: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1402: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1403: chpass(1) has a file descriptor leak which allows an
1404: attacker to modify /etc/master.passwd.</a>
1.294 david 1405: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1406: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1407: should not be executed with fd slots 0, 1, or 2 free.
1408: (patch included).</a>
1.294 david 1409: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1410: libraries (patches included).</a>
1.294 david 1411: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1412: processes too permissive (4th revision patch included).</a>
1.294 david 1413: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1414: of immutable and append-only file flags. (patch included).</a>
1.294 david 1415: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1416: if IPSEC is enabled (patch included).</a>
1.294 david 1417: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1418: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1419: </ul>
1.9 deraadt 1420:
1.106 deraadt 1421: <p>
1422: <li>
1.288 matthieu 1423: <a name="22"></a>
1.235 miod 1424:
1.294 david 1425: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1426: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1427: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1428: still exist in other operating systems. (The supplied patches are for
1429: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1430:
1.96 deraadt 1431: <p>
1.9 deraadt 1432: <ul>
1.294 david 1433: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1434: packets if IPSEC is enabled (patch included).</a>
1.294 david 1435: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1436: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1437: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1438: (patch included).</a>
1.294 david 1439: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1440: (patch included).</a>
1.294 david 1441: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1442: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1443: (patch included).</a>
1.294 david 1444: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1445: export (patch included).</a>
1.112 philen 1446: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1447: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1448: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1449: Acceptance.</a>
1.294 david 1450: A patch is available <a href="errata22.html#sourceroute">here</a>.
1451: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1452: flaw (patch included).</a>
1.294 david 1453: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1454: </ul>
1455:
1.106 deraadt 1456: <p>
1457: <li>
1.288 matthieu 1458: <a name="21"></a>
1.235 miod 1459:
1.294 david 1460: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1461: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1462: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1463: exist in other operating systems. (If you are running OpenBSD 2.1, we
1464: would strongly recommend an upgrade to the newest release, as this
1465: patch list only attempts at fixing the most important security
1466: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1467: security problems. Many of those problems were solved in ways which
1468: make it hard for us to provide patches).
1469:
1.96 deraadt 1470: <p>
1.52 deraadt 1471: <ul>
1.112 philen 1472: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1473: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1474: (patch included)</a>
1.112 philen 1475: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1476: </ul>
1.51 deraadt 1477:
1.106 deraadt 1478: <p>
1479: <li>
1.288 matthieu 1480: <a name="20"></a>
1.235 miod 1481:
1.294 david 1482: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1483: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1484: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1485: exist in other operating systems. (If you are running OpenBSD 2.0, we
1486: commend you for being there back in the old days!, but you're really
1487: missing out if you don't install a new version!)
1488:
1489: <p>
1490: <ul>
1.112 philen 1491: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1492: resolver (patch included)</a>
1493: <li>Many others... if people can hunt them down, please let me know
1494: and we'll put them up here.
1495: </ul>
1.51 deraadt 1496: <p>
1.106 deraadt 1497:
1.288 matthieu 1498: <a name="watching"></a>
1.294 david 1499: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1500:
1.21 deraadt 1501: Since we take a proactive stance with security, we are continually
1502: finding and fixing new security problems. Not all of these problems
1.80 espie 1503: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1504: confirmed to be exploitable; many simple bugs we fix do turn out to
1505: have security consequences we could not predict. We do not have the
1506: time resources to make these changes available in the above format.<p>
1.21 deraadt 1507:
1508: Thus there are usually minor security fixes in the current source code
1509: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1510: guarantee that these problems are of minimal impact and unproven
1.44 ian 1511: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1512: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1513:
1.45 deraadt 1514: People who are really concerned with security can do a number of
1515: things:<p>
1.21 deraadt 1516:
1517: <ul>
1518: <li>If you understand security issues, watch our
1.294 david 1519: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1520: eye out for things which appear security related. Since
1.21 deraadt 1521: exploitability is not proven for many of the fixes we make,
1522: do not expect the relevant commit message to say "SECURITY FIX!".
1523: If a problem is proven and serious, a patch will be available
1524: here very shortly after.
1.161 horacio 1525: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1526: security-announce mailing list</a> which will notify you for every
1.186 ian 1527: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1528: and instruct you on how to patch the problem.
1.21 deraadt 1529: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1530: complete system build from time to time (read /usr/src/Makefile
1531: carefully). Users can make the assumption that the current
1532: source tree always has stronger security than the previous release.
1.45 deraadt 1533: However, building your own system from source code is not trivial;
1.265 miod 1534: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1535: transition between major releases.
1.115 ericj 1536: <li>Install a binary snapshot for your
1.80 espie 1537: architecture, which are made available fairly often. For
1.29 deraadt 1538: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1539: </ul>
1540:
1.9 deraadt 1541: <p>
1.288 matthieu 1542: <a name="reporting"></a>
1.294 david 1543: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1544:
1.5 deraadt 1545: <p> If you find a new security problem, you can mail it to
1.294 david 1546: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1547: <br>
1.5 deraadt 1548: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1549: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1550:
1.107 deraadt 1551: <p>
1.288 matthieu 1552: <a name="papers"></a>
1.294 david 1553: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1554:
1555: A number of papers have been written by OpenBSD team members, about security
1556: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1557: documents are available as follows.<p>
1.107 deraadt 1558:
1559: <ul>
1.113 deraadt 1560: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1561: <a href="events.html#usenix99">Usenix 1999</a>,
1562: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1563: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1564: <a href="papers/bcrypt-paper.ps">paper</a> and
1565: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1566: <p>
1567: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1568: <a href="events.html#usenix99">Usenix 1999</a>,
1569: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1570: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1571: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1572: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1573: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1574: <a href="papers/crypt-paper.ps">paper</a> and
1575: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1576: <p>
1577: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1578: <a href="events.html#usenix99">Usenix 1999</a>,
1579: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1580: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1581: <a href="papers/strlcpy-paper.ps">paper</a> and
1582: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1583: <p>
1.118 deraadt 1584: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1585: <a href="events.html#lisa99">LISA 1999</a>,
1586: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1587: <a href="papers/authgw-paper.ps">paper</a> and
1588: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1589: <p>
1.153 jufi 1590: <li>Encrypting Virtual Memory<br>
1.294 david 1591: <a href="events.html#sec2000">Usenix Security 2000</a>,
1592: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1593: <a href="papers/swapencrypt.ps">paper</a> and
1594: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1595: <p>
1.107 deraadt 1596: </ul>
1.294 david 1597: </ul>
1.106 deraadt 1598:
1.2 deraadt 1599: <hr>
1.294 david 1600: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1601: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1602: <br>
1.351 ! okan 1603: <small>$OpenBSD: security.html,v 1.350 2007/10/18 15:56:58 deraadt Exp $</small>
1.1 deraadt 1604:
1.24 deraadt 1605: </body>
1606: </html>
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