Annotation of www/security.html, Revision 1.357
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.280 david 57: <a href="#34">3.4</a>,
1.301 miod 58: <a href="#35">3.5</a>,
1.312 david 59: <a href="#36">3.6</a>,
1.318 deraadt 60: <a href="#37">3.7</a>,
1.321 brad 61: <a href="#38">3.8</a>,
1.334 brad 62: <a href="#39">3.9</a>,
1.348 merdely 63: <a href="#40">4.0</a>,
64: <a href="#41">4.1</a>,
1.357 ! brad 65: <a href="#42">4.2</a>,
! 66: <a href="#43">4.3</a>.
1.114 philen 67: </td>
68: </tr>
69: </table>
1.56 deraadt 70: <hr>
71:
1.294 david 72: <a name="goals"></a>
1.278 deraadt 73: <ul>
1.294 david 74: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 75:
1.14 deraadt 76: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 77: ONE in the industry for security (if we are not already there). Our
78: open software development model permits us to take a more
79: uncompromising view towards increased security than Sun, SGI, IBM, HP,
80: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 81: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 82: cryptography</a>, we are able to take cryptographic approaches towards
83: fixing security problems.<p>
1.18 deraadt 84:
1.288 matthieu 85: <a name="disclosure"></a>
1.294 david 86: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 87:
1.45 deraadt 88: Like many readers of the
1.196 jufi 89: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 90: BUGTRAQ mailing list</a>,
1.106 deraadt 91: we believe in full disclosure of security problems. In the
92: operating system arena, we were probably the first to embrace
93: the concept. Many vendors, even of free software, still try
94: to hide issues from their users.<p>
95:
96: Security information moves very fast in cracker circles. On the other
97: hand, our experience is that coding and releasing of proper security
98: fixes typically requires about an hour of work -- very fast fix
99: turnaround is possible. Thus we think that full disclosure helps the
100: people who really care about security.<p>
101:
1.288 matthieu 102: <a name="process"></a>
1.294 david 103: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 104:
1.12 deraadt 105: Our security auditing team typically has between six and twelve
1.45 deraadt 106: members who continue to search for and fix new security holes. We
107: have been auditing since the summer of 1996. The process we follow to
108: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 109: every critical software component. We are not so much looking for
110: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 111: years later someone discovers the problem used to be a security
1.106 deraadt 112: issue, and we fixed it because it was just a bug, well, all the
113: better. Flaws have been found in just about every area of the system.
114: Entire new classes of security problems have been found during our
115: audit, and often source code which had been audited earlier needs
116: re-auditing with these new flaws in mind. Code often gets audited
117: multiple times, and by multiple people with different auditing
118: skills.<p>
1.12 deraadt 119:
1.94 deraadt 120: Some members of our security auditing team worked for Secure Networks,
121: the company that made the industry's premier network security scanning
122: software package Ballista (Secure Networks got purchased by Network
123: Associates, Ballista got renamed to Cybercop Scanner, and well...)
124: That company did a lot of security research, and thus fit in well
1.106 deraadt 125: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
126: colours since day 1.<p>
1.31 deraadt 127:
1.34 deraadt 128: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 129: In most cases we have found that the determination of exploitability
130: is not an issue. During our ongoing auditing process we find many
131: bugs, and endeavor to fix them even though exploitability is not
132: proven. We fix the bug, and we move on to find other bugs to fix. We
133: have fixed many simple and obvious careless programming errors in code
134: and only months later discovered that the problems were in fact
135: exploitable. (Or, more likely someone on
1.197 jufi 136: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 137: would report that other operating systems were vulnerable to a `newly
138: discovered problem', and then it would be discovered that OpenBSD had
139: been fixed in a previous release). In other cases we have been saved
140: from full exploitability of complex step-by-step attacks because we
141: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 142: managed such a success is the lpd advisory that Secure Networks put out.
143: <p>
1.29 deraadt 144:
1.288 matthieu 145: <a name="newtech"></a>
1.294 david 146: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 147:
148: As we audit source code, we often invent new ways of solving problems.
149: Sometimes these ideas have been used before in some random application
150: written somewhere, but perhaps not taken to the degree that we do.
151: <p>
152:
153: <ul>
154: <li>strlcpy() and strlcat()
155: <li>Memory protection purify
156: <ul>
157: <li>W^X
158: <li>.rodata segment
159: <li>Guard pages
160: <li>Randomized malloc()
161: <li>Randomized mmap()
162: <li>atexit() and stdio protection
163: </ul>
1.295 otto 164: <li>Privilege separation
1.278 deraadt 165: <li>Privilege revocation
166: <li>Chroot jailing
167: <li>New uids
168: <li>ProPolice
169: <li>... and others
170: </ul>
171: <p>
172:
1.294 david 173: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 174:
1.45 deraadt 175: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 176: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 177: commonplace in security forums like
1.197 jufi 178: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 179:
1.45 deraadt 180: The most intense part of our security auditing happened immediately
1.80 espie 181: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 182: over the last third of 1996 and first half of 1997. Thousands (yes,
183: thousands) of security issues were fixed rapidly over this year-long
184: period; bugs like the standard buffer overflows, protocol
185: implementation weaknesses, information gathering, and filesystem
186: races. Hence most of the security problems that we encountered were
187: fixed before our 2.1 release, and then a far smaller number needed
188: fixing for our 2.2 release. We do not find as many problems anymore,
189: it is simply a case of diminishing returns. Recently the security
190: problems we find and fix tend to be significantly more obscure or
191: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 192:
1.35 deraadt 193: <ul>
1.45 deraadt 194: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 195: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 196: to search for more complicated exploits, so we will too.
197: <li>Finding and fixing subtle flaws in complicated software is
198: a lot of fun.
1.35 deraadt 199: </ul>
1.106 deraadt 200: <p>
1.15 deraadt 201:
1.14 deraadt 202: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 203: to find and fix new security flaws.<p>
1.12 deraadt 204:
1.288 matthieu 205: <a name="default"></a>
1.294 david 206: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 207:
208: To ensure that novice users of OpenBSD do not need to become security
209: experts overnight (a viewpoint which other vendors seem to have), we
210: ship the operating system in a Secure by Default mode. All non-essential
211: services are disabled. As the user/administrator becomes more familiar
212: with the system, he will discover that he has to enable daemons and other
213: parts of the system. During the process of learning how to enable a new
214: service, the novice is more likely to learn of security considerations.<p>
215:
216: This is in stark contrast to the increasing number of systems that
217: ship with NFS, mountd, web servers, and various other services enabled
218: by default, creating instantaneous security problems for their users
219: within minutes after their first install.<p>
220:
1.288 matthieu 221: <a name="crypto"></a>
1.294 david 222: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 223:
224: And of course, since the OpenBSD project is based in Canada, it is possible
225: for us to integrate cryptography. For more information, read the page
1.116 deraadt 226: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 227:
1.294 david 228: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 229:
230: <li>
1.357 ! brad 231: <a name="43"></a>
! 232:
! 233: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
! 234: These are the OpenBSD 4.3 advisories -- all these problems are solved
! 235: in <a href=anoncvs.html>OpenBSD current</a> and the
! 236: <a href=stable.html>patch branch</a>.
! 237:
! 238: <p>
! 239: <ul>
! 240: <li><a href="errata43.html#001_openssh">March 30, 2008:
! 241: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
! 242: even when a sshd_config(5) ForceCommand directive was in effect.</a>
! 243: </ul>
! 244:
! 245:
! 246: <li>
1.348 merdely 247: <a name="42"></a>
248:
249: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
250: These are the OpenBSD 4.2 advisories -- all these problems are solved
251: in <a href=anoncvs.html>OpenBSD current</a> and the
252: <a href=stable.html>patch branch</a>.
253:
254: <p>
255: <ul>
1.357 ! brad 256: <li><a href="errata42.html#010_openssh">March 30, 2008:
! 257: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
! 258: even when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 259: <li><a href="errata42.html#009_ppp">March 7, 2008:
260: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 261: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
262: Multiple vulnerabilities in X.Org.</a>
1.352 henning 263: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
264: A missing NULL pointer check can lead to a kernel panic.</a>
265: <li><a href="errata42.html#004_pf">Nov 27, 2007:
266: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 267: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
268: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 269: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 270: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 271: </ul>
272:
273: <li>
1.346 matthieu 274: <a name="41"></a>
275:
276: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
277: These are the OpenBSD 4.1 advisories -- all these problems are solved
278: in <a href=anoncvs.html>OpenBSD current</a> and the
279: <a href=stable.html>patch branch</a>.
280:
281: <p>
282: <ul>
1.357 ! brad 283: <li><a href="errata41.html#015_openssh">March 30, 2008:
! 284: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
! 285: even when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 286: <li><a href="errata41.html#014_ppp">March 7, 2008:
287: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 288: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
289: Multiple vulnerabilities in X.Org.</a>
290: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
291: The SSL_get_shared_ciphers() function in OpenSSL contains
292: an off-by-one overflow.</a>
1.350 deraadt 293: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 294: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 295: <li><a href="errata41.html#009_file">Jul 9, 2007:
296: Fix possible heap overflow in file(1).</a>
1.346 matthieu 297: <li><a href="errata41.html#005_route6">Apr 27, 2007:
298: IPv6 type 0 route headers can be used to mount a DoS attack
299: against hosts and networks.</a>
300: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
301: Multiple vulnerabilities in X.Org.</a>
302: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
303: Incorrect mbuf handling for ICMP6 packets.</a>
304: </ul>
305:
1.355 miod 306: <p>
307: OpenBSD 4.0 and earlier releases are not supported anymore. The following
308: paragraphs only list advisories issued while they were maintained; these
309: releases are likely to be affected by the advisories for more recent releases.
310: <br>
311:
1.346 matthieu 312: <li>
1.334 brad 313: <a name="40"></a>
314: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
315: These are the OpenBSD 4.0 advisories -- all these problems are solved
316: in <a href=anoncvs.html>OpenBSD current</a> and the
317: <a href=stable.html>patch branch</a>.
318:
319: <p>
320: <ul>
1.350 deraadt 321: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 322: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 323: <li><a href="errata40.html#015_file">Jul 9, 2007:
324: Fix possible heap overflow in file(1).</a>
1.343 deraadt 325: <li><a href="errata40.html#012_route6">Apr 23, 2007:
326: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 327: against hosts and networks.</a>
1.342 mbalmer 328: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
329: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 330: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
331: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 332: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 333: Insufficient validation in vga(4) may allow an attacker to gain
334: root privileges on some i386 systems.</a>
1.339 deraadt 335: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 336: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 337: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 338: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
339: found by Chris Evans.</a>
1.339 deraadt 340: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 341: Several problems have been found in OpenSSL.</a>
1.339 deraadt 342: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 343: httpd(8) does not sanitize the Expect header from an HTTP request
344: when it is reflected back in an error message, which might allow
345: cross-site scripting (XSS) style attacks.</a>
346: </ul>
347:
348: <li>
1.321 brad 349: <a name="39"></a>
350:
351: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
352: These are the OpenBSD 3.9 advisories -- all these problems are solved
353: in <a href=anoncvs.html>OpenBSD current</a> and the
354: <a href=stable.html>patch branch</a>.
355:
356: <p>
357: <ul>
1.343 deraadt 358: <li><a href="errata39.html#022_route6">Apr 23, 2007:
359: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 360: against hosts and networks.</a>
1.342 mbalmer 361: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
362: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 363: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
364: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 365: <li><a href="errata39.html#agp">Jan 3, 2007:
366: Insufficient validation in vga(4) may allow an attacker to gain
367: root privileges on some i386 systems.</a>
1.336 brad 368: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 369: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 370: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 371: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 372: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 373: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 374: found by Chris Evans.</a>
1.333 deraadt 375: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 376: Several problems have been found in OpenSSL.</a>
1.333 deraadt 377: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 378: httpd(8) does not sanitize the Expect header from an HTTP request
379: when it is reflected back in an error message, which might allow
380: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 381: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 382: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
383: possible for an attacker to construct an invalid signature which
384: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 385: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 386: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 387: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 388: Due to the failure to correctly validate LCP configuration option
389: lengths, it is possible for an attacker to send LCP packets via an
390: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 391: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 392: A problem in isakmpd(8) caused IPsec to run partly without replay
393: protection.</a>
1.333 deraadt 394: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 395: It is possible to cause the kernel to panic when more than the default
396: number of sempahores have been allocated.</a>
1.333 deraadt 397: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 398: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
399: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
400: option.</a>
1.333 deraadt 401: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 402: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 403: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 404: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
405: overflow.</a>
1.333 deraadt 406: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 407: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 408: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 409: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 410: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 411: A race condition has been reported to exist in the handling by sendmail
412: of asynchronous signals.</a>
413: </ul>
414:
415: <li>
1.318 deraadt 416: <a name="38"></a>
417:
418: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
419: These are the OpenBSD 3.8 advisories -- all these problems are solved
420: in <a href=anoncvs.html>OpenBSD current</a> and the
421: <a href=stable.html>patch branch</a>.
422:
423: <p>
424: <ul>
1.332 brad 425: <li><a href="errata38.html#ssh2">Oct 12, 2006:
426: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 427: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 428: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 429: found by Chris Evans.</a>
430: <li><a href="errata38.html#openssl2">Oct 7, 2006:
431: Several problems have been found in OpenSSL.</a>
432: <li><a href="errata38.html#httpd2">Oct 7, 2006:
433: httpd(8) does not sanitize the Expect header from an HTTP request
434: when it is reflected back in an error message, which might allow
435: cross-site scripting (XSS) style attacks.</a>
1.329 brad 436: <li><a href="errata38.html#openssl">Sep 8, 2006:
437: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
438: possible for an attacker to construct an invalid signature which
439: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 440: <li><a href="errata38.html#bind">Sep 8, 2006:
441: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 442: <li><a href="errata38.html#sppp">Sep 2, 2006:
443: Due to the failure to correctly validate LCP configuration option
444: lengths, it is possible for an attacker to send LCP packets via an
445: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 446: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
447: A problem in isakmpd(8) caused IPsec to run partly without replay
448: protection.</a>
449: <li><a href="errata38.html#sem">Aug 25, 2006:
450: It is possible to cause the kernel to panic when more than the default
451: number of sempahores have been allocated.</a>
452: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
453: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
454: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
455: option.</a>
456: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
457: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 458: <li><a href="errata38.html#httpd">Jul 30, 2006:
459: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
460: overflow.</a>
1.324 brad 461: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
462: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 463: <li><a href="errata38.html#xorg">May 2, 2006:
464: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 465: <li><a href="errata38.html#sendmail">Mar 25, 2006:
466: A race condition has been reported to exist in the handling by sendmail
467: of asynchronous signals.</a>
468: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 469: Josh Bressers has reported a weakness in OpenSSH caused due to the
470: insecure use of the system(3) function in scp(1) when performing copy
471: operations using filenames that are supplied by the user from the
472: command line.</a>
1.321 brad 473: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 474: Do not allow users to trick suid programs into re-opening files via
475: /dev/fd.</a>
1.321 brad 476: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 477: A buffer overflow has been found in the Perl interpreter with the
478: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 479: </ul>
480:
481: <li>
1.312 david 482: <a name="37"></a>
483:
484: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
485: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 486: in <a href="anoncvs.html">OpenBSD current</a>. The
487: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
488: you should update your machine.
1.312 david 489:
490: <p>
491: <ul>
1.322 brad 492: <li><a href="errata37.html#xorg">May 2, 2006:
493: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 494: <li><a href="errata37.html#sendmail">Mar 25, 2006:
495: A race condition has been reported to exist in the handling by sendmail
496: of asynchronous signals.</a>
1.320 brad 497: <li><a href="errata37.html#ssh">Feb 12, 2006:
498: Josh Bressers has reported a weakness in OpenSSH caused due to the
499: insecure use of the system(3) function in scp(1) when performing copy
500: operations using filenames that are supplied by the user from the
501: command line.</a>
1.319 brad 502: <li><a href="errata37.html#fd">Jan 5, 2006:
503: Do not allow users to trick suid programs into re-opening files via
504: /dev/fd.</a>
505: <li><a href="errata37.html#perl">Jan 5, 2006:
506: A buffer overflow has been found in the Perl interpreter with the
507: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 508: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 509: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 510: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 511: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 512: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 513: Fix a race condition in sudo(8) that could allow a user
1.315 millert 514: to run arbitrary commands.</a>
1.318 deraadt 515: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 516: Fix a buffer overflow, memory leaks, and NULL pointer
517: dereference in cvs(1).</a>
1.312 david 518: </ul>
519:
520: <li>
1.301 miod 521: <a name="36"></a>
522:
523: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
524: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 525: in <a href="anoncvs.html">OpenBSD current</a>. The
526: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
527: you should update your machine.
1.301 miod 528:
529: <p>
1.302 markus 530: <ul>
1.317 millert 531: <li><a href="errata36.html#libz2">Jul 21, 2005:
532: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 533: <li><a href="errata36.html#libz">Jul 6, 2005:
534: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 535: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 536: Fix a race condition in sudo(8) that could allow a user
1.315 millert 537: to run arbitrary commands.</a>
1.311 deraadt 538: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 539: Fix a buffer overflow, memory leaks, and NULL pointer
540: dereference in cvs(1).</a>
1.311 deraadt 541: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 542: Due to buffer overflows in telnet(1), a malicious
543: server or man-in-the-middle attack could allow
544: execution of arbitrary code with the privileges of
545: the user invoking telnet(1).</a>
1.311 deraadt 546: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 547: More stringent checking should be done in the copy(9)
548: functions to prevent their misuse.</a>
1.311 deraadt 549: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 550: More stringent checking should be done in the copy(9)
551: functions to prevent their misuse.</a>
1.311 deraadt 552: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 553: httpd(8)'s mod_include module fails to properly validate
554: the length of user supplied tag strings prior to copying
1.305 brad 555: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 556: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 557: On systems running isakmpd(8) it is possible for a local
558: user to cause kernel memory corruption and system panic by
1.303 markus 559: setting ipsec(4) credentials on a socket.</a>
1.302 markus 560: </ul>
1.301 miod 561:
562: <li>
1.288 matthieu 563: <a name="35"></a>
1.279 deraadt 564:
1.294 david 565: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 566: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 567: in <a href="anoncvs.html">OpenBSD current</a>. The
568: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
569: you should update your machine.
1.279 deraadt 570:
571: <p>
572: <ul>
1.310 brad 573: <li><a href="errata35.html#cvs4">Apr 28, 2005:
574: Fix a buffer overflow, memory leaks, and NULL pointer
575: dereference in cvs(1).</a>
1.309 brad 576: <li><a href="errata35.html#telnet">Mar 30, 2005:
577: Due to buffer overflows in telnet(1), a malicious
578: server or man-in-the-middle attack could allow
579: execution of arbitrary code with the privileges of
580: the user invoking telnet(1).</a>
1.308 brad 581: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 582: More stringent checking should be done in the copy(9)
583: functions to prevent their misuse.</a>
1.306 brad 584: <li><a href="errata35.html#locore">Feb 28, 2005:
585: More stringent checking should be done in the copy(9)
586: functions to prevent their misuse.</a>
1.304 brad 587: <li><a href="errata35.html#httpd3">Jan 12, 2005:
588: httpd(8)'s mod_include module fails to properly validate
589: the length of user supplied tag strings prior to copying
1.305 brad 590: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 591: <li><a href="errata35.html#pfkey">Dec 14, 2004:
592: On systems running isakmpd(8) it is possible for a local
593: user to cause kernel memory corruption and system panic by
1.303 markus 594: setting ipsec(4) credentials on a socket.</a>
1.301 miod 595: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 596: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 597: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 598: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 599: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 600: httpd(8)'s mod_rewrite module can be made to write one zero byte in
601: an arbitrary memory position outside of a char array, causing a DoS
602: or possibly buffer overflows.</a>
1.301 miod 603: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 604: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 605: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 606: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 607: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 608: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 609: Multiple remote vulnerabilities have been found in the cvs(1)
610: server which can be used by CVS clients to crash or execute
1.293 brad 611: arbitrary code on the server.</a>
1.301 miod 612: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 613: kdc(8) performs inadequate checking of request fields, leading
614: to the possibility of principal impersonation from other
615: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 616: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 617: xdm(1) ignores the requestPort resource and creates a
1.293 brad 618: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 619: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 620: A buffer overflow in the cvs(1) server has been found,
621: which can be used by CVS clients to execute arbitrary code on
1.293 brad 622: the server.</a>
1.301 miod 623: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 624: Integer overflow problems were found in procfs, allowing
1.293 brad 625: reading of arbitrary kernel memory.</a>
1.301 miod 626: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 627: Pathname validation problems have been found in cvs(1),
628: allowing clients and servers access to files outside the
1.293 brad 629: repository or local CVS tree.</a>
1.279 deraadt 630: </ul>
631:
632: <p>
633: <li>
1.288 matthieu 634: <a name="34"></a>
1.261 david 635:
1.294 david 636: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 637: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 638: in <a href="anoncvs.html">OpenBSD current</a>. The
639: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
640: you should update your machine.
1.261 david 641: <p>
642: <ul>
1.302 markus 643: <li><a href="errata34.html#pfkey">Dec 14, 2004:
644: On systems running isakmpd(8) it is possible for a local
645: user to cause kernel memory corruption and system panic by
1.303 markus 646: setting ipsec(4) credentials on a socket.</a>
1.298 brad 647: <li><a href="errata34.html#xpm">Sep 16, 2004:
648: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 649: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
650: httpd(8)'s mod_rewrite module can be made to write one zero byte in
651: an arbitrary memory position outside of a char array, causing a DoS
652: or possibly buffer overflows.</a>
1.294 david 653: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 654: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 655: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 656: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 657: an attacker can delete IPsec tunnels at will.</a>
1.294 david 658: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 659: Multiple remote vulnerabilities have been found in the cvs(1)
660: server which can be used by CVS clients to crash or execute
1.293 brad 661: arbitrary code on the server.</a>
1.294 david 662: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 663: kdc(8) performs inadequate checking of request fields, leading
664: to the possibility of principal impersonation from other
665: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 666: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 667: A buffer overflow in the cvs(1) server has been found,
668: which can be used by CVS clients to execute arbitrary code on
669: the server.</a>
1.294 david 670: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 671: Integer overflow problems were found in procfs, allowing
672: reading of arbitrary kernel memory.</a>
1.294 david 673: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 674: Pathname validation problems have been found in cvs(1),
675: allowing clients and servers access to files outside the
676: repository or local CVS tree.</a>
1.294 david 677: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 678: A missing check for a NULL-pointer dereference may allow a
1.281 otto 679: remote attacker to crash applications using OpenSSL.</a>
1.294 david 680: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 681: Defects in the payload validation and processing functions of
682: isakmpd have been discovered. An attacker could send malformed
683: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 684: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 685: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
686: access module, using IP addresses without a netmask on big endian
687: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 688: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 689: An IPv6 MTU handling problem exists that could be used by an
690: attacker to cause a denial of service attack.</a>
1.294 david 691: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 692: A reference counting bug in shmat(2) could be used to write to
693: kernel memory under certain circumstances.</a>
1.294 david 694: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 695: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 696: by Thomas Walpuski.</a>
1.294 david 697: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 698: It may be possible for a local user to overrun the stack in
699: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 700: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 701: The use of certain ASN.1 encodings or malformed public keys may
702: allow an attacker to mount a denial of service attack against
703: applications linked with ssl(3).</a>
1.261 david 704: </ul>
705:
706: <li>
1.288 matthieu 707: <a name="33"></a>
1.246 deraadt 708:
1.294 david 709: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 710: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 711: in <a href="anoncvs.html">OpenBSD current</a>. The
712: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 713: you should update your machine.
1.246 deraadt 714: <p>
715: <ul>
1.294 david 716: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 717: Pathname validation problems have been found in cvs(1),
718: allowing clients and servers access to files outside the
719: repository or local CVS tree.</a>
1.294 david 720: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 721: A missing check for a NULL-pointer dereference may allow a
1.281 otto 722: remote attacker to crash applications using OpenSSL.</a>
1.294 david 723: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 724: Defects in the payload validation and processing functions of
725: isakmpd have been discovered. An attacker could send malformed
726: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 727: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 728: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
729: access module, using IP addresses without a netmask on big endian
730: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 731: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 732: An IPv6 MTU handling problem exists that could be used by an
733: attacker to cause a denial of service attack.</a>
1.294 david 734: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 735: A reference counting bug in shmat(2) could be used to write to
736: kernel memory under certain circumstances.</a>
1.294 david 737: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 738: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 739: by Thomas Walpuski.</a>
1.294 david 740: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 741: It may be possible for a local user to execute arbitrary code
742: resulting in escalation of privileges due to a stack overrun
743: in compat_ibcs2(8).</a>
1.294 david 744: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 745: The use of certain ASN.1 encodings or malformed public keys may
746: allow an attacker to mount a denial of service attack against
747: applications linked with ssl(3).</a>
1.294 david 748: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 749: Access of freed memory in pf(4) could be used to
1.260 margarid 750: remotely panic a machine using scrub rules.</a>
1.294 david 751: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 752: A buffer overflow in the address parsing in
753: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 754: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 755: OpenSSH versions prior to 3.7 contains a buffer management error
756: that is potentially exploitable.</a>
1.294 david 757: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 758: Root may be able to reduce the security level by taking advantage of
759: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 760: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 761: An improper bounds check in the kernel may allow a local user
762: to panic the kernel.</a>
1.294 david 763: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 764: An off-by-one error exists in the C library function realpath(3)
765: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 766: </ul>
767:
1.265 miod 768:
1.247 david 769: <p>
1.246 deraadt 770: <li>
1.288 matthieu 771: <a name="32"></a>
1.224 deraadt 772:
1.294 david 773: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 774: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 775: in <a href="anoncvs.html">OpenBSD current</a>. The
776: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 777: you should update your machine.
1.224 deraadt 778: <p>
779: <ul>
1.294 david 780: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 781: The use of certain ASN.1 encodings or malformed public keys may
782: allow an attacker to mount a denial of service attack against
783: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 784: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 785: Access of freed memory in pf(4) could be used to
1.260 margarid 786: remotely panic a machine using scrub rules.</a>
1.294 david 787: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 788: A buffer overflow in the address parsing in
789: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 790: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 791: OpenSSH versions prior to 3.7 contains a buffer management error
792: that is potentially exploitable.</a>
1.294 david 793: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 794: Fix for a potential security issue in
795: sendmail(8) with respect to DNS maps.</a>
1.294 david 796: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 797: An off-by-one error exists in the C library function realpath(3)
798: may allow an attacker to gain escalated privileges.</a>
1.294 david 799: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 800: A buffer overflow in the address parsing in
801: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 802: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 803: A cryptographic weaknesses in the Kerberos v4 protocol can be
804: exploited on Kerberos v5 as well.</a>
1.294 david 805: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 806: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 807: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 808: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 809: Various SSL and TLS operations in OpenSSL are vulnerable to
810: timing attacks.</a>
1.294 david 811: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 812: A buffer overflow in lprm(1) may allow an attacker to elevate
813: privileges to user daemon.</a>.
1.294 david 814: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 815: A buffer overflow in the envelope comments processing in
816: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 817: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 818: httpd(8) leaks file inode numbers via ETag header as well as
819: child PIDs in multipart MIME boundary generation. This could
820: lead, for example, to NFS exploitation because it uses inode
821: numbers as part of the file handle.</a>
1.294 david 822: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 823: In ssl(8) an information leak can occur via timing by performing
824: a MAC computation even if incorrect block cipher padding has
825: been found, this is a countermeasure. Also, check for negative
826: sizes, in allocation routines.</a>
1.294 david 827: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 828: A double free exists in cvs(1) that could lead to privilege
829: escalation for cvs configurations where the cvs command is
1.233 margarid 830: run as a privileged user.</a>
1.294 david 831: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 832: A buffer overflow exists in named(8) that could lead to a
833: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 834: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 835: A logic error in the pool kernel memory allocator could cause
836: memory corruption in low-memory situations, causing the system
837: to crash.</a>
1.294 david 838: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 839: An attacker can bypass smrsh(8)'s restrictions and execute
840: arbitrary commands with the privileges of his own account.</a>
1.294 david 841: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 842: Network bridges running pf with scrubbing enabled could cause
843: mbuf corruption, causing the system to crash.</a>
1.294 david 844: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 845: A buffer overflow can occur in the kadmind(8) daemon, leading
846: to possible remote crash or exploit.</a>
1.224 deraadt 847: </ul>
848:
1.227 miod 849: <p>
850: <li>
1.288 matthieu 851: <a name="31"></a>
1.203 deraadt 852:
1.294 david 853: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 854: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 855: in <a href="anoncvs.html">OpenBSD current</a>. The
856: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 857: you should update your machine.
1.203 deraadt 858:
859: <p>
860: <ul>
1.294 david 861: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 862: A buffer overflow in the address parsing in
863: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 864: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 865: A cryptographic weaknesses in the Kerberos v4 protocol can be
866: exploited on Kerberos v5 as well.</a>
1.294 david 867: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 868: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 869: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 870: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 871: Various SSL and TLS operations in OpenSSL are vulnerable to
872: timing attacks.</a>
1.294 david 873: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 874: A buffer overflow in lprm(1) may allow an attacker to gain
875: root privileges.</a>
1.294 david 876: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 877: A buffer overflow in the envelope comments processing in
878: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 879: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 880: In ssl(8) an information leak can occur via timing by performing
881: a MAC computation even if incorrect block cipher padding has
882: been found, this is a countermeasure. Also, check for negative
883: sizes, in allocation routines.</a>
1.294 david 884: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 885: A double free exists in cvs(1) that could lead to privilege
886: escalation for cvs configurations where the cvs command is
1.294 david 887: run as a privileged user</a>.
888: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 889: A buffer overflow exists in named(8) that could lead to a
890: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 891: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 892: Incorrect argument checking in the getitimer(2) system call
893: may allow an attacker to crash the system.</a>
1.294 david 894: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 895: An attacker can bypass smrsh(8)'s restrictions and execute
896: arbitrary commands with the privileges of his own account.</a>
1.294 david 897: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 898: A buffer overflow can occur in the kadmind(8) daemon, leading
899: to possible remote crash or exploit.</a>
1.294 david 900: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 901: Incorrect argument checking in the setitimer(2) system call
902: may allow an attacker to write to kernel memory.</a>
1.294 david 903: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 904: An insufficient boundary check in the select system call
1.220 miod 905: allows an attacker to overwrite kernel memory and execute arbitrary code
906: in kernel context.</a>
1.294 david 907: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 908: Several remote buffer overflows can occur in the SSL2 server and SSL3
909: client of the ssl(8) library, as in the ASN.1 parser code in the
910: crypto(3) library, all of them being potentially remotely
911: exploitable.</a>
1.294 david 912: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 913: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
914: possible remote crash.</a>
1.294 david 915: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 916: A race condition exists in the pppd(8) daemon which may cause it to
917: alter the file permissions of an arbitrary file.</a>
1.294 david 918: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 919: Receiving IKE payloads out of sequence can cause isakmpd(8) to
920: crash.</a>
1.294 david 921: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 922: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 923: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 924: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 925: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 926: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 927: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 928: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 929: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 930: input validation error that can result in an integer overflow and
931: privilege escalation.</a>
1.294 david 932: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 933: A buffer overflow can occur during the interpretation of chunked
934: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 935: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 936: Under certain conditions, on systems using YP with netgroups
937: in the password database, it is possible that sshd(8) does
938: ACL checks for the requested user name but uses the password
939: database entry of a different user for authentication. This
940: means that denied users might authenticate successfully
941: while permitted users could be locked out.</a>
1.294 david 942: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 943: A race condition exists that could defeat the kernel's
944: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 945: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 946: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 947: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 948: A local user can gain super-user privileges due to a buffer
949: overflow in sshd(8) if AFS has been configured on the system
950: or if KerberosTgtPassing or AFSTokenPassing has been enabled
951: in the sshd_config file.</a>
1.203 deraadt 952: </ul>
953:
1.235 miod 954: <p>
1.203 deraadt 955: <li>
1.288 matthieu 956: <a name="30"></a>
1.187 deraadt 957:
1.294 david 958: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 959: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 960: in <a href="anoncvs.html">OpenBSD current</a>. The
961: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 962: you should update your machine.
1.187 deraadt 963:
964: <p>
965: <ul>
1.294 david 966: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 967: A buffer overflow exists in named(8) that could lead to a
968: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 969: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 970: Incorrect argument checking in the getitimer(2) system call
971: may allow an attacker to crash the system.</a>
1.294 david 972: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 973: An attacker can bypass smrsh(8)'s restrictions and execute
974: arbitrary commands with the privileges of his own account.</a>
1.294 david 975: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 976: A buffer overflow can occur in the kadmind(8) daemon, leading
977: to possible remote crash or exploit.</a>
1.294 david 978: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 979: Incorrect argument checking in the setitimer(2) system call
980: may allow an attacker to write to kernel memory.</a>
1.294 david 981: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 982: An insufficient boundary check in the select and poll system calls
983: allows an attacker to overwrite kernel memory and execute arbitrary code
984: in kernel context.</a>
1.294 david 985: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 986: Several remote buffer overflows can occur in the SSL2 server and SSL3
987: client of the ssl(8) library, as in the ASN.1 parser code in the
988: crypto(3) library, all of them being potentially remotely
989: exploitable.</a>
1.294 david 990: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 991: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
992: possible remote crash.</a>
1.294 david 993: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 994: A race condition exists in the pppd(8) daemon which may cause it to
995: alter the file permissions of an arbitrary file.</a>
1.294 david 996: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 997: Receiving IKE payloads out of sequence can cause isakmpd(8) to
998: crash.</a>
1.294 david 999: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1000: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1001: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1002: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1003: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1004: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1005: input validation error that can result in an integer overflow and
1006: privilege escalation.</a>
1.294 david 1007: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1008: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1009: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1010: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1011: A buffer overflow can occur during the interpretation of chunked
1012: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1013: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1014: A race condition exists that could defeat the kernel's
1015: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1016: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1017: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1018: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1019: A local user can gain super-user privileges due to a buffer
1020: overflow in sshd(8) if AFS has been configured on the system
1021: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1022: in the sshd_config file.</a>
1.294 david 1023: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1024: The mail(1) was interpreting tilde escapes even when invoked
1025: in non-interactive mode. As mail(1) is called as root from cron,
1026: this can lead to a local root compromise.</a>
1.294 david 1027: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1028: Under certain conditions, on systems using YP with netgroups in
1029: the password database, it is possible for the rexecd(8) and rshd(8)
1030: daemons to execute a shell from a password database entry for a
1031: different user. Similarly, atrun(8) may change to the wrong
1032: home directory when running jobs.</a>
1.294 david 1033: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1034: A potential double free() exists in the zlib library;
1035: this is not exploitable on OpenBSD.
1036: The kernel also contains a copy of zlib; it is not
1037: currently known if the kernel zlib is exploitable.</a>
1.294 david 1038: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1039: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1040: may allow a local user to gain super-user privileges.</a>
1.294 david 1041: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1042: A race condition between the ptrace(2) and execve(2) system calls
1043: allows an attacker to modify the memory contents of suid/sgid
1044: processes which could lead to compromise of the super-user account.</a>
1.294 david 1045: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1046: There is a security hole in sudo(8) that can be exploited
1047: when the Postfix sendmail replacement is installed that may
1048: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1049: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1050: An attacker can trick a machine running the lpd daemon into
1051: creating new files in the root directory from a machine with
1052: remote line printer access.</a>
1.294 david 1053: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1054: The vi.recover script can be abused in such a way as
1055: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1056: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1057: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1058: resulting in a crash.</a>
1.294 david 1059: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1060: A security hole that may allow an attacker to partially authenticate
1061: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1062: </ul>
1063:
1064: <p>
1065: <li>
1.288 matthieu 1066: <a name="29"></a>
1.173 deraadt 1067:
1.294 david 1068: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1069: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1070: in <a href="anoncvs.html">OpenBSD current</a>. The
1071: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1072: you should update your machine.
1073:
1.173 deraadt 1074:
1075: <p>
1076: <ul>
1.294 david 1077: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1078: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1079: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1080: A race condition exists that could defeat the kernel's
1081: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1082: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1083: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1084: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1085: A local user can gain super-user privileges due to a buffer
1086: overflow in sshd(8) if AFS has been configured on the system
1087: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1088: in the sshd_config file.</a>
1.294 david 1089: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1090: The mail(1) was interpreting tilde escapes even when invoked
1091: in non-interactive mode. As mail(1) is called as root from cron,
1092: this can lead to a local root compromise.</a>
1.294 david 1093: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1094: A potential double free() exists in the zlib library;
1095: this is not exploitable on OpenBSD.
1096: The kernel also contains a copy of zlib; it is not
1097: currently known if the kernel zlib is exploitable.</a>
1.294 david 1098: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1099: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1100: may allow a local user to gain super-user privileges.</a>
1.294 david 1101: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1102: A race condition between the ptrace(2) and execve(2) system calls
1103: allows an attacker to modify the memory contents of suid/sgid
1104: processes which could lead to compromise of the super-user account.</a>
1.294 david 1105: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1106: There is a security hole in sudo(8) that can be exploited
1107: when the Postfix sendmail replacement is installed that may
1108: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1109: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1110: An attacker can trick a machine running the lpd daemon into
1111: creating new files in the root directory from a machine with
1112: remote line printer access.</a>
1.294 david 1113: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1114: The vi.recover script can be abused in such a way as
1115: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1116: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1117: A security hole exists in uuxqt(8) that may allow an
1118: attacker to gain root privileges.</a>
1.294 david 1119: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1120: A security hole exists in lpd(8) that may allow an
1121: attacker to gain root privileges if lpd is running.</a>
1.294 david 1122: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1123: A security hole exists in sendmail(8) that may allow an
1124: attacker on the local host to gain root privileges.</a>
1.294 david 1125: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1126: A kernel buffer overflow in the NFS code can be used to execute
1127: arbitrary code by users with mount privileges (only root by
1.181 millert 1128: default).</a>
1.294 david 1129: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1130: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1131: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1132: sshd(8) allows users to delete arbitrary files named "cookies"
1133: if X11 forwarding is enabled. X11 forwarding is disabled
1134: by default.</a>
1.294 david 1135: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1136: Programs using the fts routines can be tricked into changing
1137: into the wrong directory.</a>
1.294 david 1138: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1139: Sendmail signal handlers contain unsafe code,
1140: leading to numerous race conditions.</a>
1.173 deraadt 1141: </ul>
1142:
1143: <p>
1144: <li>
1.288 matthieu 1145: <a name="28"></a>
1.152 deraadt 1146:
1.294 david 1147: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1148: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1149: in <a href="anoncvs.html">OpenBSD current</a>. The
1150: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1151: you should update your machine.
1152:
1.152 deraadt 1153:
1154: <p>
1155: <ul>
1.294 david 1156: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1157: A security hole exists in uuxqt(8) that may allow an
1158: attacker to gain root privileges.</a>
1.294 david 1159: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1160: A security hole exists in lpd(8) that may allow an
1161: attacker to gain root privileges if lpd is running.</a>
1.294 david 1162: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1163: A security hole exists in sendmail(8) that may allow an
1164: attacker on the local host to gain root privileges.</a>
1.294 david 1165: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1166: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1167: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1168: Programs using the fts routines can be tricked into changing
1169: into the wrong directory.</a>
1.294 david 1170: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1171: Sendmail signal handlers contain unsafe code,
1172: leading to numerous race conditions.</a>
1.294 david 1173: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1174: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1175: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1176: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1177: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1178: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1179: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1180: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1181: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1182: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1183: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1184: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1185: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1186: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1187: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1188: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1189: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1190: rnd(4) did not use all of its input when written to.</a>
1.294 david 1191: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1192: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1193: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1194: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1195: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1196: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1197: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1198: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1199: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1200: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1201: </ul>
1202:
1203: <p>
1204: <li>
1.288 matthieu 1205: <a name="27"></a>
1.124 deraadt 1206:
1.294 david 1207: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1208: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1209: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1210: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1211:
1212: <p>
1213: <ul>
1.294 david 1214: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1215: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1216: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1217: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1218: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1219: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1220: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1221: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1222: (patch included)</a>
1.294 david 1223: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1224: X11 libraries have 2 potential overflows in xtrans code.
1225: (patch included)</a>
1.294 david 1226: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1227: Apache mod_rewrite and mod_vhost_alias modules could expose files
1228: on the server in certain configurations if used.
1229: (patch included)</a>
1.294 david 1230: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1231: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1232: TERMPATH and TERMCAP environment variables as it should.
1233: (patch included)</a>
1.294 david 1234: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1235: There are printf-style format string bugs in several privileged
1236: programs. (patch included)</a>
1.294 david 1237: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1238: libcurses honored terminal descriptions in the $HOME/.terminfo
1239: directory as well as in the TERMCAP environment variable for
1240: setuid and setgid applications.
1.146 deraadt 1241: (patch included)</a>
1.294 david 1242: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1243: A format string vulnerability exists in talkd(8).
1244: (patch included)</a>
1.294 david 1245: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1246: A format string vulnerability exists in the pw_error() function of the
1247: libutil library, yielding localhost root through chpass(1).
1248: (patch included)</a>
1.294 david 1249: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1250: Bad ESP/AH packets could cause a crash under certain conditions.
1251: (patch included)</a>
1.294 david 1252: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1253: A format string vulnerability (localhost root) exists in xlock(1).
1254: (patch included)</a>
1.294 david 1255: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1256: Various bugs found in X11 libraries have various side effects, almost
1257: completely denial of service in OpenBSD.
1258: (patch included)</a>
1.294 david 1259: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1260: Just like pretty much all the other unix ftp daemons
1261: on the planet, ftpd had a remote root hole in it.
1262: Luckily, ftpd was not enabled by default.
1.137 deraadt 1263: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1264: (patch included)</a>
1.294 david 1265: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1266: Mopd, very rarely used, contained some buffer overflows.
1267: (patch included)</a>
1.294 david 1268: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1269: libedit would check for a <b>.editrc</b> file in the current
1270: directory. Not known to be a real security issue, but a patch
1271: is available anyways.
1272: (patch included)</a>
1.294 david 1273: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1274: A serious bug in dhclient(8) could allow strings from a
1275: malicious dhcp server to be executed in the shell as root.
1276: (patch included)</a>
1.294 david 1277: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1278: A serious bug in isakmpd(8) policy handling wherein
1279: policy verification could be completely bypassed in isakmpd.
1280: (patch included)</a>
1.294 david 1281: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1282: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1283: should not be used, and results in security problems on
1284: other operating systems.</a>
1.294 david 1285: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1286: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1287: (patch included)</a>
1.294 david 1288: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1289: Improper use of ipf <i>keep-state</i> rules can result
1290: in firewall rules being bypassed. (patch included)</a>
1291:
1.124 deraadt 1292: </ul>
1293:
1294: <p>
1295: <li>
1.288 matthieu 1296: <a name="26"></a>
1.119 deraadt 1297:
1.294 david 1298: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1299: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1300: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1301: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1302:
1303: <p>
1304: <ul>
1.294 david 1305: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1306: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1307: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1308: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1309: Improper use of ipf <i>keep-state</i> rules can result
1310: in firewall rules being bypassed. (patch included)</a>
1.294 david 1311: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1312: xlockmore has a bug which a localhost attacker can use to gain
1313: access to the encrypted root password hash (which is normally
1.245 miod 1314: encoded using blowfish</a> (see
1.294 david 1315: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1316: crypt(3)</a>)
1.245 miod 1317: (patch included).
1.294 david 1318: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1319: Systems running with procfs enabled and mounted are
1320: vulnerable to a very tricky exploit. procfs is not
1321: mounted by default.
1322: (patch included).</a>
1.294 david 1323: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1324: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1325: thus exposing the system to a race where the aliases file
1326: did not exist.
1.119 deraadt 1327: (patch included).</a>
1.294 david 1328: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1329: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1330: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1331: A buffer overflow in the RSAREF code included in the
1332: USA version of libssl, is possibly exploitable in
1333: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1334: (patch included).<br></a>
1335: <strong>Update:</strong> Turns out that this was not exploitable
1336: in any of the software included in OpenBSD 2.6.
1.294 david 1337: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1338: Any user could change interface media configurations, resulting in
1339: a localhost denial of service attack.
1.121 deraadt 1340: (patch included).</a>
1.119 deraadt 1341: </ul>
1342:
1343: <p>
1344: <li>
1.288 matthieu 1345: <a name="25"></a>
1.106 deraadt 1346:
1.294 david 1347: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1348: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1349: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1350: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1351:
1.96 deraadt 1352: <p>
1.104 deraadt 1353: <ul>
1.294 david 1354: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1355: In cron(8), make sure argv[] is NULL terminated in the
1356: fake popen() and run sendmail as the user, not as root.
1357: (patch included).</a>
1.294 david 1358: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1359: filesystems had an overrun in their handling of uio_offset
1360: in their readdir() routines. (These filesystems are not
1361: enabled by default). (patch included).</a>
1.294 david 1362: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1363: when we execve() a new process. (patch included).</a>
1.294 david 1364: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1365: been handled by IPsec may be transmitted as cleartext.
1366: PF_KEY SA expirations may leak kernel resources.
1367: (patch included).</a>
1.294 david 1368: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1369: motd re-writing and change the find(1) to use -execdir
1370: (patch included).</a>
1.294 david 1371: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1372: users to chflags(2) or fchflags(2) on character or block devices
1373: which they may currently be the owner of (patch included).</a>
1.294 david 1374: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1375: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1376: </ul>
1377:
1.106 deraadt 1378: <p>
1379: <li>
1.288 matthieu 1380: <a name="24"></a>
1.235 miod 1381:
1.294 david 1382: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1383: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1384: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1385: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1386:
1.96 deraadt 1387: <p>
1.75 deraadt 1388: <ul>
1.294 david 1389: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1390: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1391: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1392: another kernel crash case caused by the <strong>crashme</strong>
1393: program (patch included).</a>
1.294 david 1394: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1395: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1396: (patch included).</a>
1.294 david 1397: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1398: existed in ping(8). (patch included).</a>
1.294 david 1399: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1400: the ipq, which could permit an attacker to cause a crash.
1401: (patch included).</a>
1.294 david 1402: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1403: kernel between accept(2) and select(2) could permit an attacker
1404: to hang sockets from remote.
1405: (patch included).</a>
1.294 david 1406: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1407: bog the machine excessively and cause problems.
1408: (patch included).</a>
1.294 david 1409: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1410: DDB interacted to possibly cause a crash.
1411: (patch included).</a>
1.294 david 1412: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1413: (patch included).</a>
1.294 david 1414: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1415: problem in bootpd(8). (patch included).</a>
1.294 david 1416: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1417: exploitable problem relating to environment variables in termcap
1418: and curses. (patch included).</a>
1.294 david 1419: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1420: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1421: </ul>
1422:
1.106 deraadt 1423: <p>
1424: <li>
1.288 matthieu 1425: <a name="23"></a>
1.235 miod 1426:
1.294 david 1427: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1428: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1429: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1430: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1431:
1.96 deraadt 1432: <p>
1.53 matthieu 1433: <ul>
1.294 david 1434: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1435: problem in bootpd(8). (patch included).</a>
1.294 david 1436: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1437: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1438: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1439: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1440: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1441: chpass(1) has a file descriptor leak which allows an
1442: attacker to modify /etc/master.passwd.</a>
1.294 david 1443: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1444: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1445: should not be executed with fd slots 0, 1, or 2 free.
1446: (patch included).</a>
1.294 david 1447: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1448: libraries (patches included).</a>
1.294 david 1449: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1450: processes too permissive (4th revision patch included).</a>
1.294 david 1451: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1452: of immutable and append-only file flags. (patch included).</a>
1.294 david 1453: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1454: if IPSEC is enabled (patch included).</a>
1.294 david 1455: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1456: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1457: </ul>
1.9 deraadt 1458:
1.106 deraadt 1459: <p>
1460: <li>
1.288 matthieu 1461: <a name="22"></a>
1.235 miod 1462:
1.294 david 1463: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1464: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1465: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1466: still exist in other operating systems. (The supplied patches are for
1467: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1468:
1.96 deraadt 1469: <p>
1.9 deraadt 1470: <ul>
1.294 david 1471: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1472: packets if IPSEC is enabled (patch included).</a>
1.294 david 1473: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1474: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1475: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1476: (patch included).</a>
1.294 david 1477: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1478: (patch included).</a>
1.294 david 1479: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1480: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1481: (patch included).</a>
1.294 david 1482: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1483: export (patch included).</a>
1.112 philen 1484: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1485: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1486: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1487: Acceptance.</a>
1.294 david 1488: A patch is available <a href="errata22.html#sourceroute">here</a>.
1489: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1490: flaw (patch included).</a>
1.294 david 1491: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1492: </ul>
1493:
1.106 deraadt 1494: <p>
1495: <li>
1.288 matthieu 1496: <a name="21"></a>
1.235 miod 1497:
1.294 david 1498: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1499: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1500: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1501: exist in other operating systems. (If you are running OpenBSD 2.1, we
1502: would strongly recommend an upgrade to the newest release, as this
1503: patch list only attempts at fixing the most important security
1504: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1505: security problems. Many of those problems were solved in ways which
1506: make it hard for us to provide patches).
1507:
1.96 deraadt 1508: <p>
1.52 deraadt 1509: <ul>
1.112 philen 1510: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1511: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1512: (patch included)</a>
1.112 philen 1513: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1514: </ul>
1.51 deraadt 1515:
1.106 deraadt 1516: <p>
1517: <li>
1.288 matthieu 1518: <a name="20"></a>
1.235 miod 1519:
1.294 david 1520: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1521: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1522: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1523: exist in other operating systems. (If you are running OpenBSD 2.0, we
1524: commend you for being there back in the old days!, but you're really
1525: missing out if you don't install a new version!)
1526:
1527: <p>
1528: <ul>
1.112 philen 1529: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1530: resolver (patch included)</a>
1531: <li>Many others... if people can hunt them down, please let me know
1532: and we'll put them up here.
1533: </ul>
1.51 deraadt 1534: <p>
1.106 deraadt 1535:
1.288 matthieu 1536: <a name="watching"></a>
1.294 david 1537: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1538:
1.21 deraadt 1539: Since we take a proactive stance with security, we are continually
1540: finding and fixing new security problems. Not all of these problems
1.80 espie 1541: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1542: confirmed to be exploitable; many simple bugs we fix do turn out to
1543: have security consequences we could not predict. We do not have the
1544: time resources to make these changes available in the above format.<p>
1.21 deraadt 1545:
1546: Thus there are usually minor security fixes in the current source code
1547: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1548: guarantee that these problems are of minimal impact and unproven
1.44 ian 1549: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1550: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1551:
1.45 deraadt 1552: People who are really concerned with security can do a number of
1553: things:<p>
1.21 deraadt 1554:
1555: <ul>
1556: <li>If you understand security issues, watch our
1.294 david 1557: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1558: eye out for things which appear security related. Since
1.21 deraadt 1559: exploitability is not proven for many of the fixes we make,
1560: do not expect the relevant commit message to say "SECURITY FIX!".
1561: If a problem is proven and serious, a patch will be available
1562: here very shortly after.
1.161 horacio 1563: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1564: security-announce mailing list</a> which will notify you for every
1.186 ian 1565: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1566: and instruct you on how to patch the problem.
1.21 deraadt 1567: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1568: complete system build from time to time (read /usr/src/Makefile
1569: carefully). Users can make the assumption that the current
1570: source tree always has stronger security than the previous release.
1.45 deraadt 1571: However, building your own system from source code is not trivial;
1.265 miod 1572: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1573: transition between major releases.
1.115 ericj 1574: <li>Install a binary snapshot for your
1.80 espie 1575: architecture, which are made available fairly often. For
1.29 deraadt 1576: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1577: </ul>
1578:
1.9 deraadt 1579: <p>
1.288 matthieu 1580: <a name="reporting"></a>
1.294 david 1581: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1582:
1.5 deraadt 1583: <p> If you find a new security problem, you can mail it to
1.294 david 1584: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1585: <br>
1.5 deraadt 1586: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1587: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1588:
1.107 deraadt 1589: <p>
1.288 matthieu 1590: <a name="papers"></a>
1.294 david 1591: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1592:
1593: A number of papers have been written by OpenBSD team members, about security
1594: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1595: documents are available as follows.<p>
1.107 deraadt 1596:
1597: <ul>
1.113 deraadt 1598: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1599: <a href="events.html#usenix99">Usenix 1999</a>,
1600: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1601: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1602: <a href="papers/bcrypt-paper.ps">paper</a> and
1603: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1604: <p>
1605: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1606: <a href="events.html#usenix99">Usenix 1999</a>,
1607: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1608: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1609: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1610: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1611: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1612: <a href="papers/crypt-paper.ps">paper</a> and
1613: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1614: <p>
1615: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1616: <a href="events.html#usenix99">Usenix 1999</a>,
1617: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1618: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1619: <a href="papers/strlcpy-paper.ps">paper</a> and
1620: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1621: <p>
1.118 deraadt 1622: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1623: <a href="events.html#lisa99">LISA 1999</a>,
1624: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1625: <a href="papers/authgw-paper.ps">paper</a> and
1626: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1627: <p>
1.153 jufi 1628: <li>Encrypting Virtual Memory<br>
1.294 david 1629: <a href="events.html#sec2000">Usenix Security 2000</a>,
1630: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1631: <a href="papers/swapencrypt.ps">paper</a> and
1632: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1633: <p>
1.107 deraadt 1634: </ul>
1.294 david 1635: </ul>
1.106 deraadt 1636:
1.2 deraadt 1637: <hr>
1.294 david 1638: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1639: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1640: <br>
1.357 ! brad 1641: <small>$OpenBSD: security.html,v 1.356 2008/03/07 18:15:14 henning Exp $</small>
1.1 deraadt 1642:
1.24 deraadt 1643: </body>
1644: </html>