Annotation of www/security.html, Revision 1.353
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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>
1.352 henning 239: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
240: A missing NULL pointer check can lead to a kernel panic.</a>
241: <li><a href="errata42.html#004_pf">Nov 27, 2007:
242: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 243: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
244: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 245: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 246: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 247: </ul>
248:
249: <li>
1.346 matthieu 250: <a name="41"></a>
251:
252: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
253: These are the OpenBSD 4.1 advisories -- all these problems are solved
254: in <a href=anoncvs.html>OpenBSD current</a> and the
255: <a href=stable.html>patch branch</a>.
256:
257: <p>
258: <ul>
1.350 deraadt 259: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 260: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 261: <li><a href="errata41.html#009_file">Jul 9, 2007:
262: Fix possible heap overflow in file(1).</a>
1.346 matthieu 263: <li><a href="errata41.html#005_route6">Apr 27, 2007:
264: IPv6 type 0 route headers can be used to mount a DoS attack
265: against hosts and networks.</a>
266: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
267: Multiple vulnerabilities in X.Org.</a>
268: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
269: Incorrect mbuf handling for ICMP6 packets.</a>
270: </ul>
271:
272: <li>
1.334 brad 273: <a name="40"></a>
274: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
275: These are the OpenBSD 4.0 advisories -- all these problems are solved
276: in <a href=anoncvs.html>OpenBSD current</a> and the
277: <a href=stable.html>patch branch</a>.
278:
279: <p>
280: <ul>
1.350 deraadt 281: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 282: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 283: <li><a href="errata40.html#015_file">Jul 9, 2007:
284: Fix possible heap overflow in file(1).</a>
1.343 deraadt 285: <li><a href="errata40.html#012_route6">Apr 23, 2007:
286: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 287: against hosts and networks.</a>
1.342 mbalmer 288: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
289: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 290: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
291: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 292: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 293: Insufficient validation in vga(4) may allow an attacker to gain
294: root privileges on some i386 systems.</a>
1.339 deraadt 295: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 296: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 297: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 298: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
299: found by Chris Evans.</a>
1.339 deraadt 300: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 301: Several problems have been found in OpenSSL.</a>
1.339 deraadt 302: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 303: httpd(8) does not sanitize the Expect header from an HTTP request
304: when it is reflected back in an error message, which might allow
305: cross-site scripting (XSS) style attacks.</a>
306: </ul>
307:
308: <li>
1.321 brad 309: <a name="39"></a>
310:
311: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
312: These are the OpenBSD 3.9 advisories -- all these problems are solved
313: in <a href=anoncvs.html>OpenBSD current</a> and the
314: <a href=stable.html>patch branch</a>.
315:
316: <p>
317: <ul>
1.343 deraadt 318: <li><a href="errata39.html#022_route6">Apr 23, 2007:
319: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 320: against hosts and networks.</a>
1.342 mbalmer 321: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
322: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 323: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
324: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 325: <li><a href="errata39.html#agp">Jan 3, 2007:
326: Insufficient validation in vga(4) may allow an attacker to gain
327: root privileges on some i386 systems.</a>
1.336 brad 328: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 329: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 330: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 331: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 332: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 333: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 334: found by Chris Evans.</a>
1.333 deraadt 335: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 336: Several problems have been found in OpenSSL.</a>
1.333 deraadt 337: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 338: httpd(8) does not sanitize the Expect header from an HTTP request
339: when it is reflected back in an error message, which might allow
340: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 341: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 342: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
343: possible for an attacker to construct an invalid signature which
344: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 345: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 346: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 347: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 348: Due to the failure to correctly validate LCP configuration option
349: lengths, it is possible for an attacker to send LCP packets via an
350: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 351: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 352: A problem in isakmpd(8) caused IPsec to run partly without replay
353: protection.</a>
1.333 deraadt 354: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 355: It is possible to cause the kernel to panic when more than the default
356: number of sempahores have been allocated.</a>
1.333 deraadt 357: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 358: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
359: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
360: option.</a>
1.333 deraadt 361: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 362: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 363: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 364: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
365: overflow.</a>
1.333 deraadt 366: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 367: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 368: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 369: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 370: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 371: A race condition has been reported to exist in the handling by sendmail
372: of asynchronous signals.</a>
373: </ul>
374:
1.338 miod 375: <p>
376: OpenBSD 3.8 and earlier releases are not supported anymore. The following
377: paragraphs only list advisories issued while they were maintained; these
378: releases are likely to be affected by the advisories for more recent releases.
379: <br>
380:
1.321 brad 381: <li>
1.318 deraadt 382: <a name="38"></a>
383:
384: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
385: These are the OpenBSD 3.8 advisories -- all these problems are solved
386: in <a href=anoncvs.html>OpenBSD current</a> and the
387: <a href=stable.html>patch branch</a>.
388:
389: <p>
390: <ul>
1.332 brad 391: <li><a href="errata38.html#ssh2">Oct 12, 2006:
392: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 393: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 394: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 395: found by Chris Evans.</a>
396: <li><a href="errata38.html#openssl2">Oct 7, 2006:
397: Several problems have been found in OpenSSL.</a>
398: <li><a href="errata38.html#httpd2">Oct 7, 2006:
399: httpd(8) does not sanitize the Expect header from an HTTP request
400: when it is reflected back in an error message, which might allow
401: cross-site scripting (XSS) style attacks.</a>
1.329 brad 402: <li><a href="errata38.html#openssl">Sep 8, 2006:
403: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
404: possible for an attacker to construct an invalid signature which
405: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 406: <li><a href="errata38.html#bind">Sep 8, 2006:
407: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 408: <li><a href="errata38.html#sppp">Sep 2, 2006:
409: Due to the failure to correctly validate LCP configuration option
410: lengths, it is possible for an attacker to send LCP packets via an
411: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 412: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
413: A problem in isakmpd(8) caused IPsec to run partly without replay
414: protection.</a>
415: <li><a href="errata38.html#sem">Aug 25, 2006:
416: It is possible to cause the kernel to panic when more than the default
417: number of sempahores have been allocated.</a>
418: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
419: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
420: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
421: option.</a>
422: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
423: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 424: <li><a href="errata38.html#httpd">Jul 30, 2006:
425: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
426: overflow.</a>
1.324 brad 427: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
428: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 429: <li><a href="errata38.html#xorg">May 2, 2006:
430: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 431: <li><a href="errata38.html#sendmail">Mar 25, 2006:
432: A race condition has been reported to exist in the handling by sendmail
433: of asynchronous signals.</a>
434: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 435: Josh Bressers has reported a weakness in OpenSSH caused due to the
436: insecure use of the system(3) function in scp(1) when performing copy
437: operations using filenames that are supplied by the user from the
438: command line.</a>
1.321 brad 439: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 440: Do not allow users to trick suid programs into re-opening files via
441: /dev/fd.</a>
1.321 brad 442: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 443: A buffer overflow has been found in the Perl interpreter with the
444: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 445: </ul>
446:
447: <li>
1.312 david 448: <a name="37"></a>
449:
450: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
451: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 452: in <a href="anoncvs.html">OpenBSD current</a>. The
453: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
454: you should update your machine.
1.312 david 455:
456: <p>
457: <ul>
1.322 brad 458: <li><a href="errata37.html#xorg">May 2, 2006:
459: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 460: <li><a href="errata37.html#sendmail">Mar 25, 2006:
461: A race condition has been reported to exist in the handling by sendmail
462: of asynchronous signals.</a>
1.320 brad 463: <li><a href="errata37.html#ssh">Feb 12, 2006:
464: Josh Bressers has reported a weakness in OpenSSH caused due to the
465: insecure use of the system(3) function in scp(1) when performing copy
466: operations using filenames that are supplied by the user from the
467: command line.</a>
1.319 brad 468: <li><a href="errata37.html#fd">Jan 5, 2006:
469: Do not allow users to trick suid programs into re-opening files via
470: /dev/fd.</a>
471: <li><a href="errata37.html#perl">Jan 5, 2006:
472: A buffer overflow has been found in the Perl interpreter with the
473: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 474: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 475: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 476: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 477: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 478: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 479: Fix a race condition in sudo(8) that could allow a user
1.315 millert 480: to run arbitrary commands.</a>
1.318 deraadt 481: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 482: Fix a buffer overflow, memory leaks, and NULL pointer
483: dereference in cvs(1).</a>
1.312 david 484: </ul>
485:
486: <li>
1.301 miod 487: <a name="36"></a>
488:
489: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
490: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 491: in <a href="anoncvs.html">OpenBSD current</a>. The
492: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
493: you should update your machine.
1.301 miod 494:
495: <p>
1.302 markus 496: <ul>
1.317 millert 497: <li><a href="errata36.html#libz2">Jul 21, 2005:
498: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 499: <li><a href="errata36.html#libz">Jul 6, 2005:
500: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 501: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 502: Fix a race condition in sudo(8) that could allow a user
1.315 millert 503: to run arbitrary commands.</a>
1.311 deraadt 504: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 505: Fix a buffer overflow, memory leaks, and NULL pointer
506: dereference in cvs(1).</a>
1.311 deraadt 507: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 508: Due to buffer overflows in telnet(1), a malicious
509: server or man-in-the-middle attack could allow
510: execution of arbitrary code with the privileges of
511: the user invoking telnet(1).</a>
1.311 deraadt 512: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 513: More stringent checking should be done in the copy(9)
514: functions to prevent their misuse.</a>
1.311 deraadt 515: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 516: More stringent checking should be done in the copy(9)
517: functions to prevent their misuse.</a>
1.311 deraadt 518: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 519: httpd(8)'s mod_include module fails to properly validate
520: the length of user supplied tag strings prior to copying
1.305 brad 521: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 522: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 523: On systems running isakmpd(8) it is possible for a local
524: user to cause kernel memory corruption and system panic by
1.303 markus 525: setting ipsec(4) credentials on a socket.</a>
1.302 markus 526: </ul>
1.301 miod 527:
528: <li>
1.288 matthieu 529: <a name="35"></a>
1.279 deraadt 530:
1.294 david 531: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 532: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 533: in <a href="anoncvs.html">OpenBSD current</a>. The
534: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
535: you should update your machine.
1.279 deraadt 536:
537: <p>
538: <ul>
1.310 brad 539: <li><a href="errata35.html#cvs4">Apr 28, 2005:
540: Fix a buffer overflow, memory leaks, and NULL pointer
541: dereference in cvs(1).</a>
1.309 brad 542: <li><a href="errata35.html#telnet">Mar 30, 2005:
543: Due to buffer overflows in telnet(1), a malicious
544: server or man-in-the-middle attack could allow
545: execution of arbitrary code with the privileges of
546: the user invoking telnet(1).</a>
1.308 brad 547: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 548: More stringent checking should be done in the copy(9)
549: functions to prevent their misuse.</a>
1.306 brad 550: <li><a href="errata35.html#locore">Feb 28, 2005:
551: More stringent checking should be done in the copy(9)
552: functions to prevent their misuse.</a>
1.304 brad 553: <li><a href="errata35.html#httpd3">Jan 12, 2005:
554: httpd(8)'s mod_include module fails to properly validate
555: the length of user supplied tag strings prior to copying
1.305 brad 556: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 557: <li><a href="errata35.html#pfkey">Dec 14, 2004:
558: On systems running isakmpd(8) it is possible for a local
559: user to cause kernel memory corruption and system panic by
1.303 markus 560: setting ipsec(4) credentials on a socket.</a>
1.301 miod 561: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 562: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 563: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 564: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 565: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 566: httpd(8)'s mod_rewrite module can be made to write one zero byte in
567: an arbitrary memory position outside of a char array, causing a DoS
568: or possibly buffer overflows.</a>
1.301 miod 569: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 570: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 571: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 572: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 573: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 574: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 575: Multiple remote vulnerabilities have been found in the cvs(1)
576: server which can be used by CVS clients to crash or execute
1.293 brad 577: arbitrary code on the server.</a>
1.301 miod 578: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 579: kdc(8) performs inadequate checking of request fields, leading
580: to the possibility of principal impersonation from other
581: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 582: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 583: xdm(1) ignores the requestPort resource and creates a
1.293 brad 584: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 585: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 586: A buffer overflow in the cvs(1) server has been found,
587: which can be used by CVS clients to execute arbitrary code on
1.293 brad 588: the server.</a>
1.301 miod 589: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 590: Integer overflow problems were found in procfs, allowing
1.293 brad 591: reading of arbitrary kernel memory.</a>
1.301 miod 592: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 593: Pathname validation problems have been found in cvs(1),
594: allowing clients and servers access to files outside the
1.293 brad 595: repository or local CVS tree.</a>
1.279 deraadt 596: </ul>
597:
598: <p>
599: <li>
1.288 matthieu 600: <a name="34"></a>
1.261 david 601:
1.294 david 602: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 603: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 604: in <a href="anoncvs.html">OpenBSD current</a>. The
605: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
606: you should update your machine.
1.261 david 607: <p>
608: <ul>
1.302 markus 609: <li><a href="errata34.html#pfkey">Dec 14, 2004:
610: On systems running isakmpd(8) it is possible for a local
611: user to cause kernel memory corruption and system panic by
1.303 markus 612: setting ipsec(4) credentials on a socket.</a>
1.298 brad 613: <li><a href="errata34.html#xpm">Sep 16, 2004:
614: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 615: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
616: httpd(8)'s mod_rewrite module can be made to write one zero byte in
617: an arbitrary memory position outside of a char array, causing a DoS
618: or possibly buffer overflows.</a>
1.294 david 619: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 620: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 621: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 622: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 623: an attacker can delete IPsec tunnels at will.</a>
1.294 david 624: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 625: Multiple remote vulnerabilities have been found in the cvs(1)
626: server which can be used by CVS clients to crash or execute
1.293 brad 627: arbitrary code on the server.</a>
1.294 david 628: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 629: kdc(8) performs inadequate checking of request fields, leading
630: to the possibility of principal impersonation from other
631: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 632: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 633: A buffer overflow in the cvs(1) server has been found,
634: which can be used by CVS clients to execute arbitrary code on
635: the server.</a>
1.294 david 636: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 637: Integer overflow problems were found in procfs, allowing
638: reading of arbitrary kernel memory.</a>
1.294 david 639: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 640: Pathname validation problems have been found in cvs(1),
641: allowing clients and servers access to files outside the
642: repository or local CVS tree.</a>
1.294 david 643: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 644: A missing check for a NULL-pointer dereference may allow a
1.281 otto 645: remote attacker to crash applications using OpenSSL.</a>
1.294 david 646: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 647: Defects in the payload validation and processing functions of
648: isakmpd have been discovered. An attacker could send malformed
649: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 650: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 651: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
652: access module, using IP addresses without a netmask on big endian
653: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 654: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 655: An IPv6 MTU handling problem exists that could be used by an
656: attacker to cause a denial of service attack.</a>
1.294 david 657: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 658: A reference counting bug in shmat(2) could be used to write to
659: kernel memory under certain circumstances.</a>
1.294 david 660: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 661: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 662: by Thomas Walpuski.</a>
1.294 david 663: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 664: It may be possible for a local user to overrun the stack in
665: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 666: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 667: The use of certain ASN.1 encodings or malformed public keys may
668: allow an attacker to mount a denial of service attack against
669: applications linked with ssl(3).</a>
1.261 david 670: </ul>
671:
672: <li>
1.288 matthieu 673: <a name="33"></a>
1.246 deraadt 674:
1.294 david 675: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 676: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 677: in <a href="anoncvs.html">OpenBSD current</a>. The
678: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 679: you should update your machine.
1.246 deraadt 680: <p>
681: <ul>
1.294 david 682: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 683: Pathname validation problems have been found in cvs(1),
684: allowing clients and servers access to files outside the
685: repository or local CVS tree.</a>
1.294 david 686: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 687: A missing check for a NULL-pointer dereference may allow a
1.281 otto 688: remote attacker to crash applications using OpenSSL.</a>
1.294 david 689: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 690: Defects in the payload validation and processing functions of
691: isakmpd have been discovered. An attacker could send malformed
692: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 693: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 694: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
695: access module, using IP addresses without a netmask on big endian
696: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 697: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 698: An IPv6 MTU handling problem exists that could be used by an
699: attacker to cause a denial of service attack.</a>
1.294 david 700: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 701: A reference counting bug in shmat(2) could be used to write to
702: kernel memory under certain circumstances.</a>
1.294 david 703: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 704: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 705: by Thomas Walpuski.</a>
1.294 david 706: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 707: It may be possible for a local user to execute arbitrary code
708: resulting in escalation of privileges due to a stack overrun
709: in compat_ibcs2(8).</a>
1.294 david 710: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 711: The use of certain ASN.1 encodings or malformed public keys may
712: allow an attacker to mount a denial of service attack against
713: applications linked with ssl(3).</a>
1.294 david 714: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 715: Access of freed memory in pf(4) could be used to
1.260 margarid 716: remotely panic a machine using scrub rules.</a>
1.294 david 717: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 718: A buffer overflow in the address parsing in
719: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 720: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 721: OpenSSH versions prior to 3.7 contains a buffer management error
722: that is potentially exploitable.</a>
1.294 david 723: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 724: Root may be able to reduce the security level by taking advantage of
725: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 726: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 727: An improper bounds check in the kernel may allow a local user
728: to panic the kernel.</a>
1.294 david 729: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 730: An off-by-one error exists in the C library function realpath(3)
731: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 732: </ul>
733:
1.265 miod 734:
1.247 david 735: <p>
1.246 deraadt 736: <li>
1.288 matthieu 737: <a name="32"></a>
1.224 deraadt 738:
1.294 david 739: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 740: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 741: in <a href="anoncvs.html">OpenBSD current</a>. The
742: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 743: you should update your machine.
1.224 deraadt 744: <p>
745: <ul>
1.294 david 746: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 747: The use of certain ASN.1 encodings or malformed public keys may
748: allow an attacker to mount a denial of service attack against
749: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 750: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 751: Access of freed memory in pf(4) could be used to
1.260 margarid 752: remotely panic a machine using scrub rules.</a>
1.294 david 753: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 754: A buffer overflow in the address parsing in
755: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 756: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 757: OpenSSH versions prior to 3.7 contains a buffer management error
758: that is potentially exploitable.</a>
1.294 david 759: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 760: Fix for a potential security issue in
761: sendmail(8) with respect to DNS maps.</a>
1.294 david 762: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 763: An off-by-one error exists in the C library function realpath(3)
764: may allow an attacker to gain escalated privileges.</a>
1.294 david 765: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 766: A buffer overflow in the address parsing in
767: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 768: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 769: A cryptographic weaknesses in the Kerberos v4 protocol can be
770: exploited on Kerberos v5 as well.</a>
1.294 david 771: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 772: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 773: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 774: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 775: Various SSL and TLS operations in OpenSSL are vulnerable to
776: timing attacks.</a>
1.294 david 777: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 778: A buffer overflow in lprm(1) may allow an attacker to elevate
779: privileges to user daemon.</a>.
1.294 david 780: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 781: A buffer overflow in the envelope comments processing in
782: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 783: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 784: httpd(8) leaks file inode numbers via ETag header as well as
785: child PIDs in multipart MIME boundary generation. This could
786: lead, for example, to NFS exploitation because it uses inode
787: numbers as part of the file handle.</a>
1.294 david 788: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 789: In ssl(8) an information leak can occur via timing by performing
790: a MAC computation even if incorrect block cipher padding has
791: been found, this is a countermeasure. Also, check for negative
792: sizes, in allocation routines.</a>
1.294 david 793: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 794: A double free exists in cvs(1) that could lead to privilege
795: escalation for cvs configurations where the cvs command is
1.233 margarid 796: run as a privileged user.</a>
1.294 david 797: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 798: A buffer overflow exists in named(8) that could lead to a
799: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 800: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 801: A logic error in the pool kernel memory allocator could cause
802: memory corruption in low-memory situations, causing the system
803: to crash.</a>
1.294 david 804: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 805: An attacker can bypass smrsh(8)'s restrictions and execute
806: arbitrary commands with the privileges of his own account.</a>
1.294 david 807: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 808: Network bridges running pf with scrubbing enabled could cause
809: mbuf corruption, causing the system to crash.</a>
1.294 david 810: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 811: A buffer overflow can occur in the kadmind(8) daemon, leading
812: to possible remote crash or exploit.</a>
1.224 deraadt 813: </ul>
814:
1.227 miod 815: <p>
816: <li>
1.288 matthieu 817: <a name="31"></a>
1.203 deraadt 818:
1.294 david 819: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 820: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 821: in <a href="anoncvs.html">OpenBSD current</a>. The
822: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 823: you should update your machine.
1.203 deraadt 824:
825: <p>
826: <ul>
1.294 david 827: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 828: A buffer overflow in the address parsing in
829: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 830: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 831: A cryptographic weaknesses in the Kerberos v4 protocol can be
832: exploited on Kerberos v5 as well.</a>
1.294 david 833: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 834: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 835: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 836: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 837: Various SSL and TLS operations in OpenSSL are vulnerable to
838: timing attacks.</a>
1.294 david 839: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 840: A buffer overflow in lprm(1) may allow an attacker to gain
841: root privileges.</a>
1.294 david 842: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 843: A buffer overflow in the envelope comments processing in
844: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 845: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 846: In ssl(8) an information leak can occur via timing by performing
847: a MAC computation even if incorrect block cipher padding has
848: been found, this is a countermeasure. Also, check for negative
849: sizes, in allocation routines.</a>
1.294 david 850: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 851: A double free exists in cvs(1) that could lead to privilege
852: escalation for cvs configurations where the cvs command is
1.294 david 853: run as a privileged user</a>.
854: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 855: A buffer overflow exists in named(8) that could lead to a
856: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 857: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 858: Incorrect argument checking in the getitimer(2) system call
859: may allow an attacker to crash the system.</a>
1.294 david 860: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 861: An attacker can bypass smrsh(8)'s restrictions and execute
862: arbitrary commands with the privileges of his own account.</a>
1.294 david 863: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 864: A buffer overflow can occur in the kadmind(8) daemon, leading
865: to possible remote crash or exploit.</a>
1.294 david 866: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 867: Incorrect argument checking in the setitimer(2) system call
868: may allow an attacker to write to kernel memory.</a>
1.294 david 869: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 870: An insufficient boundary check in the select system call
1.220 miod 871: allows an attacker to overwrite kernel memory and execute arbitrary code
872: in kernel context.</a>
1.294 david 873: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 874: Several remote buffer overflows can occur in the SSL2 server and SSL3
875: client of the ssl(8) library, as in the ASN.1 parser code in the
876: crypto(3) library, all of them being potentially remotely
877: exploitable.</a>
1.294 david 878: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 879: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
880: possible remote crash.</a>
1.294 david 881: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 882: A race condition exists in the pppd(8) daemon which may cause it to
883: alter the file permissions of an arbitrary file.</a>
1.294 david 884: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 885: Receiving IKE payloads out of sequence can cause isakmpd(8) to
886: crash.</a>
1.294 david 887: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 888: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 889: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 890: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 891: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 892: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 893: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 894: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 895: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 896: input validation error that can result in an integer overflow and
897: privilege escalation.</a>
1.294 david 898: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 899: A buffer overflow can occur during the interpretation of chunked
900: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 901: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 902: Under certain conditions, on systems using YP with netgroups
903: in the password database, it is possible that sshd(8) does
904: ACL checks for the requested user name but uses the password
905: database entry of a different user for authentication. This
906: means that denied users might authenticate successfully
907: while permitted users could be locked out.</a>
1.294 david 908: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 909: A race condition exists that could defeat the kernel's
910: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 911: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 912: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 913: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 914: A local user can gain super-user privileges due to a buffer
915: overflow in sshd(8) if AFS has been configured on the system
916: or if KerberosTgtPassing or AFSTokenPassing has been enabled
917: in the sshd_config file.</a>
1.203 deraadt 918: </ul>
919:
1.235 miod 920: <p>
1.203 deraadt 921: <li>
1.288 matthieu 922: <a name="30"></a>
1.187 deraadt 923:
1.294 david 924: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 925: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 926: in <a href="anoncvs.html">OpenBSD current</a>. The
927: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 928: you should update your machine.
1.187 deraadt 929:
930: <p>
931: <ul>
1.294 david 932: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 933: A buffer overflow exists in named(8) that could lead to a
934: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 935: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 936: Incorrect argument checking in the getitimer(2) system call
937: may allow an attacker to crash the system.</a>
1.294 david 938: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 939: An attacker can bypass smrsh(8)'s restrictions and execute
940: arbitrary commands with the privileges of his own account.</a>
1.294 david 941: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 942: A buffer overflow can occur in the kadmind(8) daemon, leading
943: to possible remote crash or exploit.</a>
1.294 david 944: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 945: Incorrect argument checking in the setitimer(2) system call
946: may allow an attacker to write to kernel memory.</a>
1.294 david 947: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 948: An insufficient boundary check in the select and poll system calls
949: allows an attacker to overwrite kernel memory and execute arbitrary code
950: in kernel context.</a>
1.294 david 951: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 952: Several remote buffer overflows can occur in the SSL2 server and SSL3
953: client of the ssl(8) library, as in the ASN.1 parser code in the
954: crypto(3) library, all of them being potentially remotely
955: exploitable.</a>
1.294 david 956: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 957: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
958: possible remote crash.</a>
1.294 david 959: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 960: A race condition exists in the pppd(8) daemon which may cause it to
961: alter the file permissions of an arbitrary file.</a>
1.294 david 962: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 963: Receiving IKE payloads out of sequence can cause isakmpd(8) to
964: crash.</a>
1.294 david 965: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 966: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 967: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 968: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 969: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 970: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 971: input validation error that can result in an integer overflow and
972: privilege escalation.</a>
1.294 david 973: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 974: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 975: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 976: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 977: A buffer overflow can occur during the interpretation of chunked
978: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 979: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 980: A race condition exists that could defeat the kernel's
981: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 982: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 983: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 984: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 985: A local user can gain super-user privileges due to a buffer
986: overflow in sshd(8) if AFS has been configured on the system
987: or if KerberosTgtPassing or AFSTokenPassing has been enabled
988: in the sshd_config file.</a>
1.294 david 989: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 990: The mail(1) was interpreting tilde escapes even when invoked
991: in non-interactive mode. As mail(1) is called as root from cron,
992: this can lead to a local root compromise.</a>
1.294 david 993: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 994: Under certain conditions, on systems using YP with netgroups in
995: the password database, it is possible for the rexecd(8) and rshd(8)
996: daemons to execute a shell from a password database entry for a
997: different user. Similarly, atrun(8) may change to the wrong
998: home directory when running jobs.</a>
1.294 david 999: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1000: A potential double free() exists in the zlib library;
1001: this is not exploitable on OpenBSD.
1002: The kernel also contains a copy of zlib; it is not
1003: currently known if the kernel zlib is exploitable.</a>
1.294 david 1004: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1005: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1006: may allow a local user to gain super-user privileges.</a>
1.294 david 1007: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1008: A race condition between the ptrace(2) and execve(2) system calls
1009: allows an attacker to modify the memory contents of suid/sgid
1010: processes which could lead to compromise of the super-user account.</a>
1.294 david 1011: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1012: There is a security hole in sudo(8) that can be exploited
1013: when the Postfix sendmail replacement is installed that may
1014: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1015: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1016: An attacker can trick a machine running the lpd daemon into
1017: creating new files in the root directory from a machine with
1018: remote line printer access.</a>
1.294 david 1019: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1020: The vi.recover script can be abused in such a way as
1021: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1022: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1023: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1024: resulting in a crash.</a>
1.294 david 1025: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1026: A security hole that may allow an attacker to partially authenticate
1027: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1028: </ul>
1029:
1030: <p>
1031: <li>
1.288 matthieu 1032: <a name="29"></a>
1.173 deraadt 1033:
1.294 david 1034: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1035: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1036: in <a href="anoncvs.html">OpenBSD current</a>. The
1037: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1038: you should update your machine.
1039:
1.173 deraadt 1040:
1041: <p>
1042: <ul>
1.294 david 1043: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1044: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1045: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1046: A race condition exists that could defeat the kernel's
1047: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1048: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1049: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1050: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1051: A local user can gain super-user privileges due to a buffer
1052: overflow in sshd(8) if AFS has been configured on the system
1053: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1054: in the sshd_config file.</a>
1.294 david 1055: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1056: The mail(1) was interpreting tilde escapes even when invoked
1057: in non-interactive mode. As mail(1) is called as root from cron,
1058: this can lead to a local root compromise.</a>
1.294 david 1059: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1060: A potential double free() exists in the zlib library;
1061: this is not exploitable on OpenBSD.
1062: The kernel also contains a copy of zlib; it is not
1063: currently known if the kernel zlib is exploitable.</a>
1.294 david 1064: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1065: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1066: may allow a local user to gain super-user privileges.</a>
1.294 david 1067: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1068: A race condition between the ptrace(2) and execve(2) system calls
1069: allows an attacker to modify the memory contents of suid/sgid
1070: processes which could lead to compromise of the super-user account.</a>
1.294 david 1071: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1072: There is a security hole in sudo(8) that can be exploited
1073: when the Postfix sendmail replacement is installed that may
1074: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1075: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1076: An attacker can trick a machine running the lpd daemon into
1077: creating new files in the root directory from a machine with
1078: remote line printer access.</a>
1.294 david 1079: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1080: The vi.recover script can be abused in such a way as
1081: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1082: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1083: A security hole exists in uuxqt(8) that may allow an
1084: attacker to gain root privileges.</a>
1.294 david 1085: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1086: A security hole exists in lpd(8) that may allow an
1087: attacker to gain root privileges if lpd is running.</a>
1.294 david 1088: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1089: A security hole exists in sendmail(8) that may allow an
1090: attacker on the local host to gain root privileges.</a>
1.294 david 1091: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1092: A kernel buffer overflow in the NFS code can be used to execute
1093: arbitrary code by users with mount privileges (only root by
1.181 millert 1094: default).</a>
1.294 david 1095: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1096: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1097: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1098: sshd(8) allows users to delete arbitrary files named "cookies"
1099: if X11 forwarding is enabled. X11 forwarding is disabled
1100: by default.</a>
1.294 david 1101: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1102: Programs using the fts routines can be tricked into changing
1103: into the wrong directory.</a>
1.294 david 1104: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1105: Sendmail signal handlers contain unsafe code,
1106: leading to numerous race conditions.</a>
1.173 deraadt 1107: </ul>
1108:
1109: <p>
1110: <li>
1.288 matthieu 1111: <a name="28"></a>
1.152 deraadt 1112:
1.294 david 1113: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1114: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1115: in <a href="anoncvs.html">OpenBSD current</a>. The
1116: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1117: you should update your machine.
1118:
1.152 deraadt 1119:
1120: <p>
1121: <ul>
1.294 david 1122: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1123: A security hole exists in uuxqt(8) that may allow an
1124: attacker to gain root privileges.</a>
1.294 david 1125: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1126: A security hole exists in lpd(8) that may allow an
1127: attacker to gain root privileges if lpd is running.</a>
1.294 david 1128: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1129: A security hole exists in sendmail(8) that may allow an
1130: attacker on the local host to gain root privileges.</a>
1.294 david 1131: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1132: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1133: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1134: Programs using the fts routines can be tricked into changing
1135: into the wrong directory.</a>
1.294 david 1136: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1137: Sendmail signal handlers contain unsafe code,
1138: leading to numerous race conditions.</a>
1.294 david 1139: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1140: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1141: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1142: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1143: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1144: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1145: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1146: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1147: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1148: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1149: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1150: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1151: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1152: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1153: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1154: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1155: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1156: rnd(4) did not use all of its input when written to.</a>
1.294 david 1157: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1158: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1159: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1160: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1161: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1162: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1163: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1164: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1165: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1166: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1167: </ul>
1168:
1169: <p>
1170: <li>
1.288 matthieu 1171: <a name="27"></a>
1.124 deraadt 1172:
1.294 david 1173: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1174: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1175: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1176: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1177:
1178: <p>
1179: <ul>
1.294 david 1180: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1181: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1182: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1183: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1184: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1185: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1186: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1187: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1188: (patch included)</a>
1.294 david 1189: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1190: X11 libraries have 2 potential overflows in xtrans code.
1191: (patch included)</a>
1.294 david 1192: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1193: Apache mod_rewrite and mod_vhost_alias modules could expose files
1194: on the server in certain configurations if used.
1195: (patch included)</a>
1.294 david 1196: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1197: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1198: TERMPATH and TERMCAP environment variables as it should.
1199: (patch included)</a>
1.294 david 1200: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1201: There are printf-style format string bugs in several privileged
1202: programs. (patch included)</a>
1.294 david 1203: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1204: libcurses honored terminal descriptions in the $HOME/.terminfo
1205: directory as well as in the TERMCAP environment variable for
1206: setuid and setgid applications.
1.146 deraadt 1207: (patch included)</a>
1.294 david 1208: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1209: A format string vulnerability exists in talkd(8).
1210: (patch included)</a>
1.294 david 1211: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1212: A format string vulnerability exists in the pw_error() function of the
1213: libutil library, yielding localhost root through chpass(1).
1214: (patch included)</a>
1.294 david 1215: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1216: Bad ESP/AH packets could cause a crash under certain conditions.
1217: (patch included)</a>
1.294 david 1218: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1219: A format string vulnerability (localhost root) exists in xlock(1).
1220: (patch included)</a>
1.294 david 1221: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1222: Various bugs found in X11 libraries have various side effects, almost
1223: completely denial of service in OpenBSD.
1224: (patch included)</a>
1.294 david 1225: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1226: Just like pretty much all the other unix ftp daemons
1227: on the planet, ftpd had a remote root hole in it.
1228: Luckily, ftpd was not enabled by default.
1.137 deraadt 1229: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1230: (patch included)</a>
1.294 david 1231: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1232: Mopd, very rarely used, contained some buffer overflows.
1233: (patch included)</a>
1.294 david 1234: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1235: libedit would check for a <b>.editrc</b> file in the current
1236: directory. Not known to be a real security issue, but a patch
1237: is available anyways.
1238: (patch included)</a>
1.294 david 1239: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1240: A serious bug in dhclient(8) could allow strings from a
1241: malicious dhcp server to be executed in the shell as root.
1242: (patch included)</a>
1.294 david 1243: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1244: A serious bug in isakmpd(8) policy handling wherein
1245: policy verification could be completely bypassed in isakmpd.
1246: (patch included)</a>
1.294 david 1247: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1248: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1249: should not be used, and results in security problems on
1250: other operating systems.</a>
1.294 david 1251: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1252: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1253: (patch included)</a>
1.294 david 1254: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1255: Improper use of ipf <i>keep-state</i> rules can result
1256: in firewall rules being bypassed. (patch included)</a>
1257:
1.124 deraadt 1258: </ul>
1259:
1260: <p>
1261: <li>
1.288 matthieu 1262: <a name="26"></a>
1.119 deraadt 1263:
1.294 david 1264: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1265: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1266: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1267: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1268:
1269: <p>
1270: <ul>
1.294 david 1271: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1272: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1273: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1274: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1275: Improper use of ipf <i>keep-state</i> rules can result
1276: in firewall rules being bypassed. (patch included)</a>
1.294 david 1277: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1278: xlockmore has a bug which a localhost attacker can use to gain
1279: access to the encrypted root password hash (which is normally
1.245 miod 1280: encoded using blowfish</a> (see
1.294 david 1281: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1282: crypt(3)</a>)
1.245 miod 1283: (patch included).
1.294 david 1284: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1285: Systems running with procfs enabled and mounted are
1286: vulnerable to a very tricky exploit. procfs is not
1287: mounted by default.
1288: (patch included).</a>
1.294 david 1289: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1290: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1291: thus exposing the system to a race where the aliases file
1292: did not exist.
1.119 deraadt 1293: (patch included).</a>
1.294 david 1294: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1295: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1296: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1297: A buffer overflow in the RSAREF code included in the
1298: USA version of libssl, is possibly exploitable in
1299: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1300: (patch included).<br></a>
1301: <strong>Update:</strong> Turns out that this was not exploitable
1302: in any of the software included in OpenBSD 2.6.
1.294 david 1303: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1304: Any user could change interface media configurations, resulting in
1305: a localhost denial of service attack.
1.121 deraadt 1306: (patch included).</a>
1.119 deraadt 1307: </ul>
1308:
1309: <p>
1310: <li>
1.288 matthieu 1311: <a name="25"></a>
1.106 deraadt 1312:
1.294 david 1313: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1314: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1315: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1316: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1317:
1.96 deraadt 1318: <p>
1.104 deraadt 1319: <ul>
1.294 david 1320: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1321: In cron(8), make sure argv[] is NULL terminated in the
1322: fake popen() and run sendmail as the user, not as root.
1323: (patch included).</a>
1.294 david 1324: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1325: filesystems had an overrun in their handling of uio_offset
1326: in their readdir() routines. (These filesystems are not
1327: enabled by default). (patch included).</a>
1.294 david 1328: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1329: when we execve() a new process. (patch included).</a>
1.294 david 1330: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1331: been handled by IPsec may be transmitted as cleartext.
1332: PF_KEY SA expirations may leak kernel resources.
1333: (patch included).</a>
1.294 david 1334: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1335: motd re-writing and change the find(1) to use -execdir
1336: (patch included).</a>
1.294 david 1337: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1338: users to chflags(2) or fchflags(2) on character or block devices
1339: which they may currently be the owner of (patch included).</a>
1.294 david 1340: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1341: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1342: </ul>
1343:
1.106 deraadt 1344: <p>
1345: <li>
1.288 matthieu 1346: <a name="24"></a>
1.235 miod 1347:
1.294 david 1348: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1349: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1350: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1351: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1352:
1.96 deraadt 1353: <p>
1.75 deraadt 1354: <ul>
1.294 david 1355: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1356: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1357: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1358: another kernel crash case caused by the <strong>crashme</strong>
1359: program (patch included).</a>
1.294 david 1360: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1361: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1362: (patch included).</a>
1.294 david 1363: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1364: existed in ping(8). (patch included).</a>
1.294 david 1365: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1366: the ipq, which could permit an attacker to cause a crash.
1367: (patch included).</a>
1.294 david 1368: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1369: kernel between accept(2) and select(2) could permit an attacker
1370: to hang sockets from remote.
1371: (patch included).</a>
1.294 david 1372: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1373: bog the machine excessively and cause problems.
1374: (patch included).</a>
1.294 david 1375: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1376: DDB interacted to possibly cause a crash.
1377: (patch included).</a>
1.294 david 1378: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1379: (patch included).</a>
1.294 david 1380: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1381: problem in bootpd(8). (patch included).</a>
1.294 david 1382: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1383: exploitable problem relating to environment variables in termcap
1384: and curses. (patch included).</a>
1.294 david 1385: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1386: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1387: </ul>
1388:
1.106 deraadt 1389: <p>
1390: <li>
1.288 matthieu 1391: <a name="23"></a>
1.235 miod 1392:
1.294 david 1393: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1394: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1395: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1396: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1397:
1.96 deraadt 1398: <p>
1.53 matthieu 1399: <ul>
1.294 david 1400: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1401: problem in bootpd(8). (patch included).</a>
1.294 david 1402: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1403: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1404: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1405: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1406: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1407: chpass(1) has a file descriptor leak which allows an
1408: attacker to modify /etc/master.passwd.</a>
1.294 david 1409: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1410: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1411: should not be executed with fd slots 0, 1, or 2 free.
1412: (patch included).</a>
1.294 david 1413: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1414: libraries (patches included).</a>
1.294 david 1415: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1416: processes too permissive (4th revision patch included).</a>
1.294 david 1417: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1418: of immutable and append-only file flags. (patch included).</a>
1.294 david 1419: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1420: if IPSEC is enabled (patch included).</a>
1.294 david 1421: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1422: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1423: </ul>
1.9 deraadt 1424:
1.106 deraadt 1425: <p>
1426: <li>
1.288 matthieu 1427: <a name="22"></a>
1.235 miod 1428:
1.294 david 1429: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1430: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1431: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1432: still exist in other operating systems. (The supplied patches are for
1433: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1434:
1.96 deraadt 1435: <p>
1.9 deraadt 1436: <ul>
1.294 david 1437: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1438: packets if IPSEC is enabled (patch included).</a>
1.294 david 1439: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1440: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1441: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1442: (patch included).</a>
1.294 david 1443: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1444: (patch included).</a>
1.294 david 1445: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1446: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1447: (patch included).</a>
1.294 david 1448: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1449: export (patch included).</a>
1.112 philen 1450: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1451: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1452: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1453: Acceptance.</a>
1.294 david 1454: A patch is available <a href="errata22.html#sourceroute">here</a>.
1455: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1456: flaw (patch included).</a>
1.294 david 1457: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1458: </ul>
1459:
1.106 deraadt 1460: <p>
1461: <li>
1.288 matthieu 1462: <a name="21"></a>
1.235 miod 1463:
1.294 david 1464: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1465: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1466: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1467: exist in other operating systems. (If you are running OpenBSD 2.1, we
1468: would strongly recommend an upgrade to the newest release, as this
1469: patch list only attempts at fixing the most important security
1470: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1471: security problems. Many of those problems were solved in ways which
1472: make it hard for us to provide patches).
1473:
1.96 deraadt 1474: <p>
1.52 deraadt 1475: <ul>
1.112 philen 1476: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1477: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1478: (patch included)</a>
1.112 philen 1479: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1480: </ul>
1.51 deraadt 1481:
1.106 deraadt 1482: <p>
1483: <li>
1.288 matthieu 1484: <a name="20"></a>
1.235 miod 1485:
1.294 david 1486: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1487: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1488: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1489: exist in other operating systems. (If you are running OpenBSD 2.0, we
1490: commend you for being there back in the old days!, but you're really
1491: missing out if you don't install a new version!)
1492:
1493: <p>
1494: <ul>
1.112 philen 1495: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1496: resolver (patch included)</a>
1497: <li>Many others... if people can hunt them down, please let me know
1498: and we'll put them up here.
1499: </ul>
1.51 deraadt 1500: <p>
1.106 deraadt 1501:
1.288 matthieu 1502: <a name="watching"></a>
1.294 david 1503: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1504:
1.21 deraadt 1505: Since we take a proactive stance with security, we are continually
1506: finding and fixing new security problems. Not all of these problems
1.80 espie 1507: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1508: confirmed to be exploitable; many simple bugs we fix do turn out to
1509: have security consequences we could not predict. We do not have the
1510: time resources to make these changes available in the above format.<p>
1.21 deraadt 1511:
1512: Thus there are usually minor security fixes in the current source code
1513: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1514: guarantee that these problems are of minimal impact and unproven
1.44 ian 1515: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1516: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1517:
1.45 deraadt 1518: People who are really concerned with security can do a number of
1519: things:<p>
1.21 deraadt 1520:
1521: <ul>
1522: <li>If you understand security issues, watch our
1.294 david 1523: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1524: eye out for things which appear security related. Since
1.21 deraadt 1525: exploitability is not proven for many of the fixes we make,
1526: do not expect the relevant commit message to say "SECURITY FIX!".
1527: If a problem is proven and serious, a patch will be available
1528: here very shortly after.
1.161 horacio 1529: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1530: security-announce mailing list</a> which will notify you for every
1.186 ian 1531: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1532: and instruct you on how to patch the problem.
1.21 deraadt 1533: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1534: complete system build from time to time (read /usr/src/Makefile
1535: carefully). Users can make the assumption that the current
1536: source tree always has stronger security than the previous release.
1.45 deraadt 1537: However, building your own system from source code is not trivial;
1.265 miod 1538: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1539: transition between major releases.
1.115 ericj 1540: <li>Install a binary snapshot for your
1.80 espie 1541: architecture, which are made available fairly often. For
1.29 deraadt 1542: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1543: </ul>
1544:
1.9 deraadt 1545: <p>
1.288 matthieu 1546: <a name="reporting"></a>
1.294 david 1547: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1548:
1.5 deraadt 1549: <p> If you find a new security problem, you can mail it to
1.294 david 1550: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1551: <br>
1.5 deraadt 1552: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1553: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1554:
1.107 deraadt 1555: <p>
1.288 matthieu 1556: <a name="papers"></a>
1.294 david 1557: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1558:
1559: A number of papers have been written by OpenBSD team members, about security
1560: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1561: documents are available as follows.<p>
1.107 deraadt 1562:
1563: <ul>
1.113 deraadt 1564: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1565: <a href="events.html#usenix99">Usenix 1999</a>,
1566: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1567: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1568: <a href="papers/bcrypt-paper.ps">paper</a> and
1569: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1570: <p>
1571: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1572: <a href="events.html#usenix99">Usenix 1999</a>,
1573: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1574: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1575: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1576: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1577: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1578: <a href="papers/crypt-paper.ps">paper</a> and
1579: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1580: <p>
1581: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1582: <a href="events.html#usenix99">Usenix 1999</a>,
1583: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1584: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1585: <a href="papers/strlcpy-paper.ps">paper</a> and
1586: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1587: <p>
1.118 deraadt 1588: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1589: <a href="events.html#lisa99">LISA 1999</a>,
1590: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1591: <a href="papers/authgw-paper.ps">paper</a> and
1592: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1593: <p>
1.153 jufi 1594: <li>Encrypting Virtual Memory<br>
1.294 david 1595: <a href="events.html#sec2000">Usenix Security 2000</a>,
1596: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1597: <a href="papers/swapencrypt.ps">paper</a> and
1598: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1599: <p>
1.107 deraadt 1600: </ul>
1.294 david 1601: </ul>
1.106 deraadt 1602:
1.2 deraadt 1603: <hr>
1.294 david 1604: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1605: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1606: <br>
1.353 ! henning 1607: <small>$OpenBSD: security.html,v 1.352 2008/01/11 16:59:41 henning Exp $</small>
1.1 deraadt 1608:
1.24 deraadt 1609: </body>
1610: </html>
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