Annotation of www/security.html, Revision 1.348
1.294 david 1: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
2: "http://www.w3.org/TR/html4/loose.dtd">
1.1 deraadt 3: <html>
4: <head>
1.20 deraadt 5: <title>OpenBSD Security</title>
1.294 david 6: <link rev=made href="mailto:www@openbsd.org">
1.345 tom 7: <link rel="alternate" type="application/rss+xml" title="OpenBSD errata (external)" href="http://www.undeadly.org/cgi?action=errata">
1.294 david 8: <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
1.1 deraadt 9: <meta name="resource-type" content="document">
10: <meta name="description" content="OpenBSD advisories">
11: <meta name="keywords" content="openbsd,main">
12: <meta name="distribution" content="global">
1.338 miod 13: <meta name="copyright" content="This document copyright 1997-2007 by OpenBSD.">
1.1 deraadt 14: </head>
15:
1.274 david 16: <body bgcolor="#ffffff" text="#000000" link="#23238E">
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>
! 239: <li>None yet.
! 240: </ul>
! 241:
! 242: <li>
1.346 matthieu 243: <a name="41"></a>
244:
245: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
246: These are the OpenBSD 4.1 advisories -- all these problems are solved
247: in <a href=anoncvs.html>OpenBSD current</a> and the
248: <a href=stable.html>patch branch</a>.
249:
250: <p>
251: <ul>
1.347 deraadt 252: <li><a href="errata41.html#009_file">Jul 9, 2007:
253: Fix possible heap overflow in file(1).</a>
1.346 matthieu 254: <li><a href="errata41.html#005_route6">Apr 27, 2007:
255: IPv6 type 0 route headers can be used to mount a DoS attack
256: against hosts and networks.</a>
257: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
258: Multiple vulnerabilities in X.Org.</a>
259: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
260: Incorrect mbuf handling for ICMP6 packets.</a>
261: </ul>
262:
263: <li>
1.334 brad 264: <a name="40"></a>
265: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
266: These are the OpenBSD 4.0 advisories -- all these problems are solved
267: in <a href=anoncvs.html>OpenBSD current</a> and the
268: <a href=stable.html>patch branch</a>.
269:
270: <p>
271: <ul>
1.347 deraadt 272: <li><a href="errata40.html#015_file">Jul 9, 2007:
273: Fix possible heap overflow in file(1).</a>
1.343 deraadt 274: <li><a href="errata40.html#012_route6">Apr 23, 2007:
275: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 276: against hosts and networks.</a>
1.342 mbalmer 277: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
278: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 279: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
280: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 281: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 282: Insufficient validation in vga(4) may allow an attacker to gain
283: root privileges on some i386 systems.</a>
1.339 deraadt 284: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 285: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 286: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 287: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
288: found by Chris Evans.</a>
1.339 deraadt 289: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 290: Several problems have been found in OpenSSL.</a>
1.339 deraadt 291: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 292: httpd(8) does not sanitize the Expect header from an HTTP request
293: when it is reflected back in an error message, which might allow
294: cross-site scripting (XSS) style attacks.</a>
295: </ul>
296:
297: <li>
1.321 brad 298: <a name="39"></a>
299:
300: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
301: These are the OpenBSD 3.9 advisories -- all these problems are solved
302: in <a href=anoncvs.html>OpenBSD current</a> and the
303: <a href=stable.html>patch branch</a>.
304:
305: <p>
306: <ul>
1.343 deraadt 307: <li><a href="errata39.html#022_route6">Apr 23, 2007:
308: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 309: against hosts and networks.</a>
1.342 mbalmer 310: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
311: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 312: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
313: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 314: <li><a href="errata39.html#agp">Jan 3, 2007:
315: Insufficient validation in vga(4) may allow an attacker to gain
316: root privileges on some i386 systems.</a>
1.336 brad 317: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 318: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 319: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 320: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 321: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 322: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 323: found by Chris Evans.</a>
1.333 deraadt 324: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 325: Several problems have been found in OpenSSL.</a>
1.333 deraadt 326: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 327: httpd(8) does not sanitize the Expect header from an HTTP request
328: when it is reflected back in an error message, which might allow
329: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 330: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 331: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
332: possible for an attacker to construct an invalid signature which
333: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 334: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 335: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 336: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 337: Due to the failure to correctly validate LCP configuration option
338: lengths, it is possible for an attacker to send LCP packets via an
339: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 340: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 341: A problem in isakmpd(8) caused IPsec to run partly without replay
342: protection.</a>
1.333 deraadt 343: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 344: It is possible to cause the kernel to panic when more than the default
345: number of sempahores have been allocated.</a>
1.333 deraadt 346: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 347: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
348: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
349: option.</a>
1.333 deraadt 350: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 351: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 352: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 353: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
354: overflow.</a>
1.333 deraadt 355: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 356: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 357: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 358: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 359: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 360: A race condition has been reported to exist in the handling by sendmail
361: of asynchronous signals.</a>
362: </ul>
363:
1.338 miod 364: <p>
365: OpenBSD 3.8 and earlier releases are not supported anymore. The following
366: paragraphs only list advisories issued while they were maintained; these
367: releases are likely to be affected by the advisories for more recent releases.
368: <br>
369:
1.321 brad 370: <li>
1.318 deraadt 371: <a name="38"></a>
372:
373: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
374: These are the OpenBSD 3.8 advisories -- all these problems are solved
375: in <a href=anoncvs.html>OpenBSD current</a> and the
376: <a href=stable.html>patch branch</a>.
377:
378: <p>
379: <ul>
1.332 brad 380: <li><a href="errata38.html#ssh2">Oct 12, 2006:
381: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 382: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 383: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 384: found by Chris Evans.</a>
385: <li><a href="errata38.html#openssl2">Oct 7, 2006:
386: Several problems have been found in OpenSSL.</a>
387: <li><a href="errata38.html#httpd2">Oct 7, 2006:
388: httpd(8) does not sanitize the Expect header from an HTTP request
389: when it is reflected back in an error message, which might allow
390: cross-site scripting (XSS) style attacks.</a>
1.329 brad 391: <li><a href="errata38.html#openssl">Sep 8, 2006:
392: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
393: possible for an attacker to construct an invalid signature which
394: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 395: <li><a href="errata38.html#bind">Sep 8, 2006:
396: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 397: <li><a href="errata38.html#sppp">Sep 2, 2006:
398: Due to the failure to correctly validate LCP configuration option
399: lengths, it is possible for an attacker to send LCP packets via an
400: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 401: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
402: A problem in isakmpd(8) caused IPsec to run partly without replay
403: protection.</a>
404: <li><a href="errata38.html#sem">Aug 25, 2006:
405: It is possible to cause the kernel to panic when more than the default
406: number of sempahores have been allocated.</a>
407: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
408: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
409: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
410: option.</a>
411: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
412: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 413: <li><a href="errata38.html#httpd">Jul 30, 2006:
414: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
415: overflow.</a>
1.324 brad 416: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
417: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 418: <li><a href="errata38.html#xorg">May 2, 2006:
419: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 420: <li><a href="errata38.html#sendmail">Mar 25, 2006:
421: A race condition has been reported to exist in the handling by sendmail
422: of asynchronous signals.</a>
423: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 424: Josh Bressers has reported a weakness in OpenSSH caused due to the
425: insecure use of the system(3) function in scp(1) when performing copy
426: operations using filenames that are supplied by the user from the
427: command line.</a>
1.321 brad 428: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 429: Do not allow users to trick suid programs into re-opening files via
430: /dev/fd.</a>
1.321 brad 431: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 432: A buffer overflow has been found in the Perl interpreter with the
433: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 434: </ul>
435:
436: <li>
1.312 david 437: <a name="37"></a>
438:
439: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
440: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 441: in <a href="anoncvs.html">OpenBSD current</a>. The
442: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
443: you should update your machine.
1.312 david 444:
445: <p>
446: <ul>
1.322 brad 447: <li><a href="errata37.html#xorg">May 2, 2006:
448: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 449: <li><a href="errata37.html#sendmail">Mar 25, 2006:
450: A race condition has been reported to exist in the handling by sendmail
451: of asynchronous signals.</a>
1.320 brad 452: <li><a href="errata37.html#ssh">Feb 12, 2006:
453: Josh Bressers has reported a weakness in OpenSSH caused due to the
454: insecure use of the system(3) function in scp(1) when performing copy
455: operations using filenames that are supplied by the user from the
456: command line.</a>
1.319 brad 457: <li><a href="errata37.html#fd">Jan 5, 2006:
458: Do not allow users to trick suid programs into re-opening files via
459: /dev/fd.</a>
460: <li><a href="errata37.html#perl">Jan 5, 2006:
461: A buffer overflow has been found in the Perl interpreter with the
462: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 463: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 464: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 465: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 466: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 467: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 468: Fix a race condition in sudo(8) that could allow a user
1.315 millert 469: to run arbitrary commands.</a>
1.318 deraadt 470: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 471: Fix a buffer overflow, memory leaks, and NULL pointer
472: dereference in cvs(1).</a>
1.312 david 473: </ul>
474:
475: <li>
1.301 miod 476: <a name="36"></a>
477:
478: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
479: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 480: in <a href="anoncvs.html">OpenBSD current</a>. The
481: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
482: you should update your machine.
1.301 miod 483:
484: <p>
1.302 markus 485: <ul>
1.317 millert 486: <li><a href="errata36.html#libz2">Jul 21, 2005:
487: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 488: <li><a href="errata36.html#libz">Jul 6, 2005:
489: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 490: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 491: Fix a race condition in sudo(8) that could allow a user
1.315 millert 492: to run arbitrary commands.</a>
1.311 deraadt 493: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 494: Fix a buffer overflow, memory leaks, and NULL pointer
495: dereference in cvs(1).</a>
1.311 deraadt 496: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 497: Due to buffer overflows in telnet(1), a malicious
498: server or man-in-the-middle attack could allow
499: execution of arbitrary code with the privileges of
500: the user invoking telnet(1).</a>
1.311 deraadt 501: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 502: More stringent checking should be done in the copy(9)
503: functions to prevent their misuse.</a>
1.311 deraadt 504: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 505: More stringent checking should be done in the copy(9)
506: functions to prevent their misuse.</a>
1.311 deraadt 507: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 508: httpd(8)'s mod_include module fails to properly validate
509: the length of user supplied tag strings prior to copying
1.305 brad 510: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 511: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 512: On systems running isakmpd(8) it is possible for a local
513: user to cause kernel memory corruption and system panic by
1.303 markus 514: setting ipsec(4) credentials on a socket.</a>
1.302 markus 515: </ul>
1.301 miod 516:
517: <li>
1.288 matthieu 518: <a name="35"></a>
1.279 deraadt 519:
1.294 david 520: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 521: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 522: in <a href="anoncvs.html">OpenBSD current</a>. The
523: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
524: you should update your machine.
1.279 deraadt 525:
526: <p>
527: <ul>
1.310 brad 528: <li><a href="errata35.html#cvs4">Apr 28, 2005:
529: Fix a buffer overflow, memory leaks, and NULL pointer
530: dereference in cvs(1).</a>
1.309 brad 531: <li><a href="errata35.html#telnet">Mar 30, 2005:
532: Due to buffer overflows in telnet(1), a malicious
533: server or man-in-the-middle attack could allow
534: execution of arbitrary code with the privileges of
535: the user invoking telnet(1).</a>
1.308 brad 536: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 537: More stringent checking should be done in the copy(9)
538: functions to prevent their misuse.</a>
1.306 brad 539: <li><a href="errata35.html#locore">Feb 28, 2005:
540: More stringent checking should be done in the copy(9)
541: functions to prevent their misuse.</a>
1.304 brad 542: <li><a href="errata35.html#httpd3">Jan 12, 2005:
543: httpd(8)'s mod_include module fails to properly validate
544: the length of user supplied tag strings prior to copying
1.305 brad 545: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 546: <li><a href="errata35.html#pfkey">Dec 14, 2004:
547: On systems running isakmpd(8) it is possible for a local
548: user to cause kernel memory corruption and system panic by
1.303 markus 549: setting ipsec(4) credentials on a socket.</a>
1.301 miod 550: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 551: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 552: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 553: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 554: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 555: httpd(8)'s mod_rewrite module can be made to write one zero byte in
556: an arbitrary memory position outside of a char array, causing a DoS
557: or possibly buffer overflows.</a>
1.301 miod 558: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 559: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 560: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 561: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 562: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 563: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 564: Multiple remote vulnerabilities have been found in the cvs(1)
565: server which can be used by CVS clients to crash or execute
1.293 brad 566: arbitrary code on the server.</a>
1.301 miod 567: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 568: kdc(8) performs inadequate checking of request fields, leading
569: to the possibility of principal impersonation from other
570: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 571: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 572: xdm(1) ignores the requestPort resource and creates a
1.293 brad 573: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 574: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 575: A buffer overflow in the cvs(1) server has been found,
576: which can be used by CVS clients to execute arbitrary code on
1.293 brad 577: the server.</a>
1.301 miod 578: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 579: Integer overflow problems were found in procfs, allowing
1.293 brad 580: reading of arbitrary kernel memory.</a>
1.301 miod 581: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 582: Pathname validation problems have been found in cvs(1),
583: allowing clients and servers access to files outside the
1.293 brad 584: repository or local CVS tree.</a>
1.279 deraadt 585: </ul>
586:
587: <p>
588: <li>
1.288 matthieu 589: <a name="34"></a>
1.261 david 590:
1.294 david 591: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 592: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 593: in <a href="anoncvs.html">OpenBSD current</a>. The
594: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
595: you should update your machine.
1.261 david 596: <p>
597: <ul>
1.302 markus 598: <li><a href="errata34.html#pfkey">Dec 14, 2004:
599: On systems running isakmpd(8) it is possible for a local
600: user to cause kernel memory corruption and system panic by
1.303 markus 601: setting ipsec(4) credentials on a socket.</a>
1.298 brad 602: <li><a href="errata34.html#xpm">Sep 16, 2004:
603: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 604: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
605: httpd(8)'s mod_rewrite module can be made to write one zero byte in
606: an arbitrary memory position outside of a char array, causing a DoS
607: or possibly buffer overflows.</a>
1.294 david 608: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 609: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 610: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 611: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 612: an attacker can delete IPsec tunnels at will.</a>
1.294 david 613: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 614: Multiple remote vulnerabilities have been found in the cvs(1)
615: server which can be used by CVS clients to crash or execute
1.293 brad 616: arbitrary code on the server.</a>
1.294 david 617: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 618: kdc(8) performs inadequate checking of request fields, leading
619: to the possibility of principal impersonation from other
620: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 621: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 622: A buffer overflow in the cvs(1) server has been found,
623: which can be used by CVS clients to execute arbitrary code on
624: the server.</a>
1.294 david 625: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 626: Integer overflow problems were found in procfs, allowing
627: reading of arbitrary kernel memory.</a>
1.294 david 628: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 629: Pathname validation problems have been found in cvs(1),
630: allowing clients and servers access to files outside the
631: repository or local CVS tree.</a>
1.294 david 632: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 633: A missing check for a NULL-pointer dereference may allow a
1.281 otto 634: remote attacker to crash applications using OpenSSL.</a>
1.294 david 635: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 636: Defects in the payload validation and processing functions of
637: isakmpd have been discovered. An attacker could send malformed
638: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 639: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 640: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
641: access module, using IP addresses without a netmask on big endian
642: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 643: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 644: An IPv6 MTU handling problem exists that could be used by an
645: attacker to cause a denial of service attack.</a>
1.294 david 646: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 647: A reference counting bug in shmat(2) could be used to write to
648: kernel memory under certain circumstances.</a>
1.294 david 649: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 650: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 651: by Thomas Walpuski.</a>
1.294 david 652: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 653: It may be possible for a local user to overrun the stack in
654: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 655: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 656: The use of certain ASN.1 encodings or malformed public keys may
657: allow an attacker to mount a denial of service attack against
658: applications linked with ssl(3).</a>
1.261 david 659: </ul>
660:
661: <li>
1.288 matthieu 662: <a name="33"></a>
1.246 deraadt 663:
1.294 david 664: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 665: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 666: in <a href="anoncvs.html">OpenBSD current</a>. The
667: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 668: you should update your machine.
1.246 deraadt 669: <p>
670: <ul>
1.294 david 671: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 672: Pathname validation problems have been found in cvs(1),
673: allowing clients and servers access to files outside the
674: repository or local CVS tree.</a>
1.294 david 675: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 676: A missing check for a NULL-pointer dereference may allow a
1.281 otto 677: remote attacker to crash applications using OpenSSL.</a>
1.294 david 678: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 679: Defects in the payload validation and processing functions of
680: isakmpd have been discovered. An attacker could send malformed
681: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 682: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 683: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
684: access module, using IP addresses without a netmask on big endian
685: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 686: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 687: An IPv6 MTU handling problem exists that could be used by an
688: attacker to cause a denial of service attack.</a>
1.294 david 689: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 690: A reference counting bug in shmat(2) could be used to write to
691: kernel memory under certain circumstances.</a>
1.294 david 692: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 693: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 694: by Thomas Walpuski.</a>
1.294 david 695: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 696: It may be possible for a local user to execute arbitrary code
697: resulting in escalation of privileges due to a stack overrun
698: in compat_ibcs2(8).</a>
1.294 david 699: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 700: The use of certain ASN.1 encodings or malformed public keys may
701: allow an attacker to mount a denial of service attack against
702: applications linked with ssl(3).</a>
1.294 david 703: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 704: Access of freed memory in pf(4) could be used to
1.260 margarid 705: remotely panic a machine using scrub rules.</a>
1.294 david 706: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 707: A buffer overflow in the address parsing in
708: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 709: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 710: OpenSSH versions prior to 3.7 contains a buffer management error
711: that is potentially exploitable.</a>
1.294 david 712: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 713: Root may be able to reduce the security level by taking advantage of
714: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 715: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 716: An improper bounds check in the kernel may allow a local user
717: to panic the kernel.</a>
1.294 david 718: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 719: An off-by-one error exists in the C library function realpath(3)
720: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 721: </ul>
722:
1.265 miod 723:
1.247 david 724: <p>
1.246 deraadt 725: <li>
1.288 matthieu 726: <a name="32"></a>
1.224 deraadt 727:
1.294 david 728: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 729: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 730: in <a href="anoncvs.html">OpenBSD current</a>. The
731: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 732: you should update your machine.
1.224 deraadt 733: <p>
734: <ul>
1.294 david 735: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 736: The use of certain ASN.1 encodings or malformed public keys may
737: allow an attacker to mount a denial of service attack against
738: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 739: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 740: Access of freed memory in pf(4) could be used to
1.260 margarid 741: remotely panic a machine using scrub rules.</a>
1.294 david 742: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 743: A buffer overflow in the address parsing in
744: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 745: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 746: OpenSSH versions prior to 3.7 contains a buffer management error
747: that is potentially exploitable.</a>
1.294 david 748: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 749: Fix for a potential security issue in
750: sendmail(8) with respect to DNS maps.</a>
1.294 david 751: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 752: An off-by-one error exists in the C library function realpath(3)
753: may allow an attacker to gain escalated privileges.</a>
1.294 david 754: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 755: A buffer overflow in the address parsing in
756: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 757: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 758: A cryptographic weaknesses in the Kerberos v4 protocol can be
759: exploited on Kerberos v5 as well.</a>
1.294 david 760: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 761: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 762: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 763: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 764: Various SSL and TLS operations in OpenSSL are vulnerable to
765: timing attacks.</a>
1.294 david 766: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 767: A buffer overflow in lprm(1) may allow an attacker to elevate
768: privileges to user daemon.</a>.
1.294 david 769: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 770: A buffer overflow in the envelope comments processing in
771: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 772: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 773: httpd(8) leaks file inode numbers via ETag header as well as
774: child PIDs in multipart MIME boundary generation. This could
775: lead, for example, to NFS exploitation because it uses inode
776: numbers as part of the file handle.</a>
1.294 david 777: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 778: In ssl(8) an information leak can occur via timing by performing
779: a MAC computation even if incorrect block cipher padding has
780: been found, this is a countermeasure. Also, check for negative
781: sizes, in allocation routines.</a>
1.294 david 782: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 783: A double free exists in cvs(1) that could lead to privilege
784: escalation for cvs configurations where the cvs command is
1.233 margarid 785: run as a privileged user.</a>
1.294 david 786: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 787: A buffer overflow exists in named(8) that could lead to a
788: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 789: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 790: A logic error in the pool kernel memory allocator could cause
791: memory corruption in low-memory situations, causing the system
792: to crash.</a>
1.294 david 793: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 794: An attacker can bypass smrsh(8)'s restrictions and execute
795: arbitrary commands with the privileges of his own account.</a>
1.294 david 796: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 797: Network bridges running pf with scrubbing enabled could cause
798: mbuf corruption, causing the system to crash.</a>
1.294 david 799: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 800: A buffer overflow can occur in the kadmind(8) daemon, leading
801: to possible remote crash or exploit.</a>
1.224 deraadt 802: </ul>
803:
1.227 miod 804: <p>
805: <li>
1.288 matthieu 806: <a name="31"></a>
1.203 deraadt 807:
1.294 david 808: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 809: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 810: in <a href="anoncvs.html">OpenBSD current</a>. The
811: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 812: you should update your machine.
1.203 deraadt 813:
814: <p>
815: <ul>
1.294 david 816: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 817: A buffer overflow in the address parsing in
818: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 819: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 820: A cryptographic weaknesses in the Kerberos v4 protocol can be
821: exploited on Kerberos v5 as well.</a>
1.294 david 822: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 823: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 824: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 825: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 826: Various SSL and TLS operations in OpenSSL are vulnerable to
827: timing attacks.</a>
1.294 david 828: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 829: A buffer overflow in lprm(1) may allow an attacker to gain
830: root privileges.</a>
1.294 david 831: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 832: A buffer overflow in the envelope comments processing in
833: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 834: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 835: In ssl(8) an information leak can occur via timing by performing
836: a MAC computation even if incorrect block cipher padding has
837: been found, this is a countermeasure. Also, check for negative
838: sizes, in allocation routines.</a>
1.294 david 839: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 840: A double free exists in cvs(1) that could lead to privilege
841: escalation for cvs configurations where the cvs command is
1.294 david 842: run as a privileged user</a>.
843: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 844: A buffer overflow exists in named(8) that could lead to a
845: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 846: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 847: Incorrect argument checking in the getitimer(2) system call
848: may allow an attacker to crash the system.</a>
1.294 david 849: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 850: An attacker can bypass smrsh(8)'s restrictions and execute
851: arbitrary commands with the privileges of his own account.</a>
1.294 david 852: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 853: A buffer overflow can occur in the kadmind(8) daemon, leading
854: to possible remote crash or exploit.</a>
1.294 david 855: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 856: Incorrect argument checking in the setitimer(2) system call
857: may allow an attacker to write to kernel memory.</a>
1.294 david 858: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 859: An insufficient boundary check in the select system call
1.220 miod 860: allows an attacker to overwrite kernel memory and execute arbitrary code
861: in kernel context.</a>
1.294 david 862: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 863: Several remote buffer overflows can occur in the SSL2 server and SSL3
864: client of the ssl(8) library, as in the ASN.1 parser code in the
865: crypto(3) library, all of them being potentially remotely
866: exploitable.</a>
1.294 david 867: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 868: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
869: possible remote crash.</a>
1.294 david 870: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 871: A race condition exists in the pppd(8) daemon which may cause it to
872: alter the file permissions of an arbitrary file.</a>
1.294 david 873: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 874: Receiving IKE payloads out of sequence can cause isakmpd(8) to
875: crash.</a>
1.294 david 876: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 877: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 878: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 879: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 880: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 881: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 882: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 883: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 884: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 885: input validation error that can result in an integer overflow and
886: privilege escalation.</a>
1.294 david 887: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 888: A buffer overflow can occur during the interpretation of chunked
889: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 890: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 891: Under certain conditions, on systems using YP with netgroups
892: in the password database, it is possible that sshd(8) does
893: ACL checks for the requested user name but uses the password
894: database entry of a different user for authentication. This
895: means that denied users might authenticate successfully
896: while permitted users could be locked out.</a>
1.294 david 897: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 898: A race condition exists that could defeat the kernel's
899: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 900: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 901: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 902: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 903: A local user can gain super-user privileges due to a buffer
904: overflow in sshd(8) if AFS has been configured on the system
905: or if KerberosTgtPassing or AFSTokenPassing has been enabled
906: in the sshd_config file.</a>
1.203 deraadt 907: </ul>
908:
1.235 miod 909: <p>
1.203 deraadt 910: <li>
1.288 matthieu 911: <a name="30"></a>
1.187 deraadt 912:
1.294 david 913: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 914: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 915: in <a href="anoncvs.html">OpenBSD current</a>. The
916: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 917: you should update your machine.
1.187 deraadt 918:
919: <p>
920: <ul>
1.294 david 921: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 922: A buffer overflow exists in named(8) that could lead to a
923: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 924: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 925: Incorrect argument checking in the getitimer(2) system call
926: may allow an attacker to crash the system.</a>
1.294 david 927: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 928: An attacker can bypass smrsh(8)'s restrictions and execute
929: arbitrary commands with the privileges of his own account.</a>
1.294 david 930: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 931: A buffer overflow can occur in the kadmind(8) daemon, leading
932: to possible remote crash or exploit.</a>
1.294 david 933: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 934: Incorrect argument checking in the setitimer(2) system call
935: may allow an attacker to write to kernel memory.</a>
1.294 david 936: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 937: An insufficient boundary check in the select and poll system calls
938: allows an attacker to overwrite kernel memory and execute arbitrary code
939: in kernel context.</a>
1.294 david 940: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 941: Several remote buffer overflows can occur in the SSL2 server and SSL3
942: client of the ssl(8) library, as in the ASN.1 parser code in the
943: crypto(3) library, all of them being potentially remotely
944: exploitable.</a>
1.294 david 945: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 946: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
947: possible remote crash.</a>
1.294 david 948: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 949: A race condition exists in the pppd(8) daemon which may cause it to
950: alter the file permissions of an arbitrary file.</a>
1.294 david 951: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 952: Receiving IKE payloads out of sequence can cause isakmpd(8) to
953: crash.</a>
1.294 david 954: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 955: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 956: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 957: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 958: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 959: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 960: input validation error that can result in an integer overflow and
961: privilege escalation.</a>
1.294 david 962: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 963: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 964: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 965: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 966: A buffer overflow can occur during the interpretation of chunked
967: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 968: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 969: A race condition exists that could defeat the kernel's
970: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 971: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 972: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 973: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 974: A local user can gain super-user privileges due to a buffer
975: overflow in sshd(8) if AFS has been configured on the system
976: or if KerberosTgtPassing or AFSTokenPassing has been enabled
977: in the sshd_config file.</a>
1.294 david 978: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 979: The mail(1) was interpreting tilde escapes even when invoked
980: in non-interactive mode. As mail(1) is called as root from cron,
981: this can lead to a local root compromise.</a>
1.294 david 982: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 983: Under certain conditions, on systems using YP with netgroups in
984: the password database, it is possible for the rexecd(8) and rshd(8)
985: daemons to execute a shell from a password database entry for a
986: different user. Similarly, atrun(8) may change to the wrong
987: home directory when running jobs.</a>
1.294 david 988: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 989: A potential double free() exists in the zlib library;
990: this is not exploitable on OpenBSD.
991: The kernel also contains a copy of zlib; it is not
992: currently known if the kernel zlib is exploitable.</a>
1.294 david 993: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 994: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 995: may allow a local user to gain super-user privileges.</a>
1.294 david 996: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 997: A race condition between the ptrace(2) and execve(2) system calls
998: allows an attacker to modify the memory contents of suid/sgid
999: processes which could lead to compromise of the super-user account.</a>
1.294 david 1000: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1001: There is a security hole in sudo(8) that can be exploited
1002: when the Postfix sendmail replacement is installed that may
1003: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1004: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1005: An attacker can trick a machine running the lpd daemon into
1006: creating new files in the root directory from a machine with
1007: remote line printer access.</a>
1.294 david 1008: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1009: The vi.recover script can be abused in such a way as
1010: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1011: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1012: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1013: resulting in a crash.</a>
1.294 david 1014: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1015: A security hole that may allow an attacker to partially authenticate
1016: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1017: </ul>
1018:
1019: <p>
1020: <li>
1.288 matthieu 1021: <a name="29"></a>
1.173 deraadt 1022:
1.294 david 1023: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1024: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1025: in <a href="anoncvs.html">OpenBSD current</a>. The
1026: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1027: you should update your machine.
1028:
1.173 deraadt 1029:
1030: <p>
1031: <ul>
1.294 david 1032: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1033: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1034: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1035: A race condition exists that could defeat the kernel's
1036: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1037: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1038: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1039: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1040: A local user can gain super-user privileges due to a buffer
1041: overflow in sshd(8) if AFS has been configured on the system
1042: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1043: in the sshd_config file.</a>
1.294 david 1044: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1045: The mail(1) was interpreting tilde escapes even when invoked
1046: in non-interactive mode. As mail(1) is called as root from cron,
1047: this can lead to a local root compromise.</a>
1.294 david 1048: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1049: A potential double free() exists in the zlib library;
1050: this is not exploitable on OpenBSD.
1051: The kernel also contains a copy of zlib; it is not
1052: currently known if the kernel zlib is exploitable.</a>
1.294 david 1053: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1054: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1055: may allow a local user to gain super-user privileges.</a>
1.294 david 1056: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1057: A race condition between the ptrace(2) and execve(2) system calls
1058: allows an attacker to modify the memory contents of suid/sgid
1059: processes which could lead to compromise of the super-user account.</a>
1.294 david 1060: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1061: There is a security hole in sudo(8) that can be exploited
1062: when the Postfix sendmail replacement is installed that may
1063: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1064: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1065: An attacker can trick a machine running the lpd daemon into
1066: creating new files in the root directory from a machine with
1067: remote line printer access.</a>
1.294 david 1068: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1069: The vi.recover script can be abused in such a way as
1070: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1071: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1072: A security hole exists in uuxqt(8) that may allow an
1073: attacker to gain root privileges.</a>
1.294 david 1074: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1075: A security hole exists in lpd(8) that may allow an
1076: attacker to gain root privileges if lpd is running.</a>
1.294 david 1077: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1078: A security hole exists in sendmail(8) that may allow an
1079: attacker on the local host to gain root privileges.</a>
1.294 david 1080: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1081: A kernel buffer overflow in the NFS code can be used to execute
1082: arbitrary code by users with mount privileges (only root by
1.181 millert 1083: default).</a>
1.294 david 1084: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1085: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1086: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1087: sshd(8) allows users to delete arbitrary files named "cookies"
1088: if X11 forwarding is enabled. X11 forwarding is disabled
1089: by default.</a>
1.294 david 1090: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1091: Programs using the fts routines can be tricked into changing
1092: into the wrong directory.</a>
1.294 david 1093: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1094: Sendmail signal handlers contain unsafe code,
1095: leading to numerous race conditions.</a>
1.173 deraadt 1096: </ul>
1097:
1098: <p>
1099: <li>
1.288 matthieu 1100: <a name="28"></a>
1.152 deraadt 1101:
1.294 david 1102: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1103: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1104: in <a href="anoncvs.html">OpenBSD current</a>. The
1105: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1106: you should update your machine.
1107:
1.152 deraadt 1108:
1109: <p>
1110: <ul>
1.294 david 1111: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1112: A security hole exists in uuxqt(8) that may allow an
1113: attacker to gain root privileges.</a>
1.294 david 1114: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1115: A security hole exists in lpd(8) that may allow an
1116: attacker to gain root privileges if lpd is running.</a>
1.294 david 1117: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1118: A security hole exists in sendmail(8) that may allow an
1119: attacker on the local host to gain root privileges.</a>
1.294 david 1120: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1121: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1122: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1123: Programs using the fts routines can be tricked into changing
1124: into the wrong directory.</a>
1.294 david 1125: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1126: Sendmail signal handlers contain unsafe code,
1127: leading to numerous race conditions.</a>
1.294 david 1128: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1129: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1130: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1131: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1132: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1133: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1134: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1135: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1136: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1137: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1138: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1139: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1140: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1141: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1142: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1143: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1144: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1145: rnd(4) did not use all of its input when written to.</a>
1.294 david 1146: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1147: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1148: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1149: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1150: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1151: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1152: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1153: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1154: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1155: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1156: </ul>
1157:
1158: <p>
1159: <li>
1.288 matthieu 1160: <a name="27"></a>
1.124 deraadt 1161:
1.294 david 1162: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1163: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1164: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1165: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1166:
1167: <p>
1168: <ul>
1.294 david 1169: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1170: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1171: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1172: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1173: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1174: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1175: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1176: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1177: (patch included)</a>
1.294 david 1178: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1179: X11 libraries have 2 potential overflows in xtrans code.
1180: (patch included)</a>
1.294 david 1181: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1182: Apache mod_rewrite and mod_vhost_alias modules could expose files
1183: on the server in certain configurations if used.
1184: (patch included)</a>
1.294 david 1185: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1186: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1187: TERMPATH and TERMCAP environment variables as it should.
1188: (patch included)</a>
1.294 david 1189: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1190: There are printf-style format string bugs in several privileged
1191: programs. (patch included)</a>
1.294 david 1192: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1193: libcurses honored terminal descriptions in the $HOME/.terminfo
1194: directory as well as in the TERMCAP environment variable for
1195: setuid and setgid applications.
1.146 deraadt 1196: (patch included)</a>
1.294 david 1197: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1198: A format string vulnerability exists in talkd(8).
1199: (patch included)</a>
1.294 david 1200: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1201: A format string vulnerability exists in the pw_error() function of the
1202: libutil library, yielding localhost root through chpass(1).
1203: (patch included)</a>
1.294 david 1204: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1205: Bad ESP/AH packets could cause a crash under certain conditions.
1206: (patch included)</a>
1.294 david 1207: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1208: A format string vulnerability (localhost root) exists in xlock(1).
1209: (patch included)</a>
1.294 david 1210: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1211: Various bugs found in X11 libraries have various side effects, almost
1212: completely denial of service in OpenBSD.
1213: (patch included)</a>
1.294 david 1214: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1215: Just like pretty much all the other unix ftp daemons
1216: on the planet, ftpd had a remote root hole in it.
1217: Luckily, ftpd was not enabled by default.
1.137 deraadt 1218: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1219: (patch included)</a>
1.294 david 1220: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1221: Mopd, very rarely used, contained some buffer overflows.
1222: (patch included)</a>
1.294 david 1223: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1224: libedit would check for a <b>.editrc</b> file in the current
1225: directory. Not known to be a real security issue, but a patch
1226: is available anyways.
1227: (patch included)</a>
1.294 david 1228: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1229: A serious bug in dhclient(8) could allow strings from a
1230: malicious dhcp server to be executed in the shell as root.
1231: (patch included)</a>
1.294 david 1232: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1233: A serious bug in isakmpd(8) policy handling wherein
1234: policy verification could be completely bypassed in isakmpd.
1235: (patch included)</a>
1.294 david 1236: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1237: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1238: should not be used, and results in security problems on
1239: other operating systems.</a>
1.294 david 1240: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1241: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1242: (patch included)</a>
1.294 david 1243: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1244: Improper use of ipf <i>keep-state</i> rules can result
1245: in firewall rules being bypassed. (patch included)</a>
1246:
1.124 deraadt 1247: </ul>
1248:
1249: <p>
1250: <li>
1.288 matthieu 1251: <a name="26"></a>
1.119 deraadt 1252:
1.294 david 1253: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1254: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1255: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1256: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1257:
1258: <p>
1259: <ul>
1.294 david 1260: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1261: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1262: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1263: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1264: Improper use of ipf <i>keep-state</i> rules can result
1265: in firewall rules being bypassed. (patch included)</a>
1.294 david 1266: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1267: xlockmore has a bug which a localhost attacker can use to gain
1268: access to the encrypted root password hash (which is normally
1.245 miod 1269: encoded using blowfish</a> (see
1.294 david 1270: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1271: crypt(3)</a>)
1.245 miod 1272: (patch included).
1.294 david 1273: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1274: Systems running with procfs enabled and mounted are
1275: vulnerable to a very tricky exploit. procfs is not
1276: mounted by default.
1277: (patch included).</a>
1.294 david 1278: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1279: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1280: thus exposing the system to a race where the aliases file
1281: did not exist.
1.119 deraadt 1282: (patch included).</a>
1.294 david 1283: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1284: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1285: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1286: A buffer overflow in the RSAREF code included in the
1287: USA version of libssl, is possibly exploitable in
1288: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1289: (patch included).<br></a>
1290: <strong>Update:</strong> Turns out that this was not exploitable
1291: in any of the software included in OpenBSD 2.6.
1.294 david 1292: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1293: Any user could change interface media configurations, resulting in
1294: a localhost denial of service attack.
1.121 deraadt 1295: (patch included).</a>
1.119 deraadt 1296: </ul>
1297:
1298: <p>
1299: <li>
1.288 matthieu 1300: <a name="25"></a>
1.106 deraadt 1301:
1.294 david 1302: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1303: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1304: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1305: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1306:
1.96 deraadt 1307: <p>
1.104 deraadt 1308: <ul>
1.294 david 1309: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1310: In cron(8), make sure argv[] is NULL terminated in the
1311: fake popen() and run sendmail as the user, not as root.
1312: (patch included).</a>
1.294 david 1313: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1314: filesystems had an overrun in their handling of uio_offset
1315: in their readdir() routines. (These filesystems are not
1316: enabled by default). (patch included).</a>
1.294 david 1317: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1318: when we execve() a new process. (patch included).</a>
1.294 david 1319: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1320: been handled by IPsec may be transmitted as cleartext.
1321: PF_KEY SA expirations may leak kernel resources.
1322: (patch included).</a>
1.294 david 1323: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1324: motd re-writing and change the find(1) to use -execdir
1325: (patch included).</a>
1.294 david 1326: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1327: users to chflags(2) or fchflags(2) on character or block devices
1328: which they may currently be the owner of (patch included).</a>
1.294 david 1329: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1330: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1331: </ul>
1332:
1.106 deraadt 1333: <p>
1334: <li>
1.288 matthieu 1335: <a name="24"></a>
1.235 miod 1336:
1.294 david 1337: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1338: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1339: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1340: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1341:
1.96 deraadt 1342: <p>
1.75 deraadt 1343: <ul>
1.294 david 1344: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1345: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1346: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1347: another kernel crash case caused by the <strong>crashme</strong>
1348: program (patch included).</a>
1.294 david 1349: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1350: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1351: (patch included).</a>
1.294 david 1352: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1353: existed in ping(8). (patch included).</a>
1.294 david 1354: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1355: the ipq, which could permit an attacker to cause a crash.
1356: (patch included).</a>
1.294 david 1357: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1358: kernel between accept(2) and select(2) could permit an attacker
1359: to hang sockets from remote.
1360: (patch included).</a>
1.294 david 1361: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1362: bog the machine excessively and cause problems.
1363: (patch included).</a>
1.294 david 1364: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1365: DDB interacted to possibly cause a crash.
1366: (patch included).</a>
1.294 david 1367: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1368: (patch included).</a>
1.294 david 1369: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1370: problem in bootpd(8). (patch included).</a>
1.294 david 1371: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1372: exploitable problem relating to environment variables in termcap
1373: and curses. (patch included).</a>
1.294 david 1374: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1375: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1376: </ul>
1377:
1.106 deraadt 1378: <p>
1379: <li>
1.288 matthieu 1380: <a name="23"></a>
1.235 miod 1381:
1.294 david 1382: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1383: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1384: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1385: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1386:
1.96 deraadt 1387: <p>
1.53 matthieu 1388: <ul>
1.294 david 1389: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1390: problem in bootpd(8). (patch included).</a>
1.294 david 1391: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1392: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1393: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1394: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1395: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1396: chpass(1) has a file descriptor leak which allows an
1397: attacker to modify /etc/master.passwd.</a>
1.294 david 1398: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1399: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1400: should not be executed with fd slots 0, 1, or 2 free.
1401: (patch included).</a>
1.294 david 1402: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1403: libraries (patches included).</a>
1.294 david 1404: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1405: processes too permissive (4th revision patch included).</a>
1.294 david 1406: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1407: of immutable and append-only file flags. (patch included).</a>
1.294 david 1408: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1409: if IPSEC is enabled (patch included).</a>
1.294 david 1410: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1411: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1412: </ul>
1.9 deraadt 1413:
1.106 deraadt 1414: <p>
1415: <li>
1.288 matthieu 1416: <a name="22"></a>
1.235 miod 1417:
1.294 david 1418: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1419: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1420: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1421: still exist in other operating systems. (The supplied patches are for
1422: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1423:
1.96 deraadt 1424: <p>
1.9 deraadt 1425: <ul>
1.294 david 1426: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1427: packets if IPSEC is enabled (patch included).</a>
1.294 david 1428: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1429: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1430: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1431: (patch included).</a>
1.294 david 1432: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1433: (patch included).</a>
1.294 david 1434: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1435: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1436: (patch included).</a>
1.294 david 1437: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1438: export (patch included).</a>
1.112 philen 1439: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1440: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1441: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1442: Acceptance.</a>
1.294 david 1443: A patch is available <a href="errata22.html#sourceroute">here</a>.
1444: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1445: flaw (patch included).</a>
1.294 david 1446: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1447: </ul>
1448:
1.106 deraadt 1449: <p>
1450: <li>
1.288 matthieu 1451: <a name="21"></a>
1.235 miod 1452:
1.294 david 1453: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1454: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1455: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1456: exist in other operating systems. (If you are running OpenBSD 2.1, we
1457: would strongly recommend an upgrade to the newest release, as this
1458: patch list only attempts at fixing the most important security
1459: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1460: security problems. Many of those problems were solved in ways which
1461: make it hard for us to provide patches).
1462:
1.96 deraadt 1463: <p>
1.52 deraadt 1464: <ul>
1.112 philen 1465: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1466: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1467: (patch included)</a>
1.112 philen 1468: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1469: </ul>
1.51 deraadt 1470:
1.106 deraadt 1471: <p>
1472: <li>
1.288 matthieu 1473: <a name="20"></a>
1.235 miod 1474:
1.294 david 1475: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1476: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1477: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1478: exist in other operating systems. (If you are running OpenBSD 2.0, we
1479: commend you for being there back in the old days!, but you're really
1480: missing out if you don't install a new version!)
1481:
1482: <p>
1483: <ul>
1.112 philen 1484: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1485: resolver (patch included)</a>
1486: <li>Many others... if people can hunt them down, please let me know
1487: and we'll put them up here.
1488: </ul>
1.51 deraadt 1489: <p>
1.106 deraadt 1490:
1.288 matthieu 1491: <a name="watching"></a>
1.294 david 1492: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1493:
1.21 deraadt 1494: Since we take a proactive stance with security, we are continually
1495: finding and fixing new security problems. Not all of these problems
1.80 espie 1496: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1497: confirmed to be exploitable; many simple bugs we fix do turn out to
1498: have security consequences we could not predict. We do not have the
1499: time resources to make these changes available in the above format.<p>
1.21 deraadt 1500:
1501: Thus there are usually minor security fixes in the current source code
1502: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1503: guarantee that these problems are of minimal impact and unproven
1.44 ian 1504: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1505: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1506:
1.45 deraadt 1507: People who are really concerned with security can do a number of
1508: things:<p>
1.21 deraadt 1509:
1510: <ul>
1511: <li>If you understand security issues, watch our
1.294 david 1512: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1513: eye out for things which appear security related. Since
1.21 deraadt 1514: exploitability is not proven for many of the fixes we make,
1515: do not expect the relevant commit message to say "SECURITY FIX!".
1516: If a problem is proven and serious, a patch will be available
1517: here very shortly after.
1.161 horacio 1518: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1519: security-announce mailing list</a> which will notify you for every
1.186 ian 1520: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1521: and instruct you on how to patch the problem.
1.21 deraadt 1522: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1523: complete system build from time to time (read /usr/src/Makefile
1524: carefully). Users can make the assumption that the current
1525: source tree always has stronger security than the previous release.
1.45 deraadt 1526: However, building your own system from source code is not trivial;
1.265 miod 1527: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1528: transition between major releases.
1.115 ericj 1529: <li>Install a binary snapshot for your
1.80 espie 1530: architecture, which are made available fairly often. For
1.29 deraadt 1531: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1532: </ul>
1533:
1.9 deraadt 1534: <p>
1.288 matthieu 1535: <a name="reporting"></a>
1.294 david 1536: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1537:
1.5 deraadt 1538: <p> If you find a new security problem, you can mail it to
1.294 david 1539: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1540: <br>
1.5 deraadt 1541: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1542: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1543:
1.107 deraadt 1544: <p>
1.288 matthieu 1545: <a name="papers"></a>
1.294 david 1546: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1547:
1548: A number of papers have been written by OpenBSD team members, about security
1549: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1550: documents are available as follows.<p>
1.107 deraadt 1551:
1552: <ul>
1.113 deraadt 1553: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1554: <a href="events.html#usenix99">Usenix 1999</a>,
1555: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1556: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1557: <a href="papers/bcrypt-paper.ps">paper</a> and
1558: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1559: <p>
1560: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1561: <a href="events.html#usenix99">Usenix 1999</a>,
1562: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1563: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1564: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1565: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1566: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1567: <a href="papers/crypt-paper.ps">paper</a> and
1568: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1569: <p>
1570: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1571: <a href="events.html#usenix99">Usenix 1999</a>,
1572: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1573: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1574: <a href="papers/strlcpy-paper.ps">paper</a> and
1575: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1576: <p>
1.118 deraadt 1577: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1578: <a href="events.html#lisa99">LISA 1999</a>,
1579: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1580: <a href="papers/authgw-paper.ps">paper</a> and
1581: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1582: <p>
1.153 jufi 1583: <li>Encrypting Virtual Memory<br>
1.294 david 1584: <a href="events.html#sec2000">Usenix Security 2000</a>,
1585: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1586: <a href="papers/swapencrypt.ps">paper</a> and
1587: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1588: <p>
1.107 deraadt 1589: </ul>
1.294 david 1590: </ul>
1.106 deraadt 1591:
1.2 deraadt 1592: <hr>
1.294 david 1593: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1594: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1595: <br>
1.348 ! merdely 1596: <small>$OpenBSD: security.html,v 1.347 2007/07/27 13:27:16 deraadt Exp $</small>
1.1 deraadt 1597:
1.24 deraadt 1598: </body>
1599: </html>
![[BACK]](/icons/back.gif){kind=icon}
Return to security.html CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / www