Annotation of www/security.html, Revision 1.372
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1.20 deraadt 5: <title>OpenBSD Security</title>
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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>,
1.365 deraadt 57: <br>
1.280 david 58: <a href="#34">3.4</a>,
1.301 miod 59: <a href="#35">3.5</a>,
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 deraadt 67: <a href="#43">4.3</a>,
68: <a href="#44">4.4</a>.
1.114 philen 69: </td>
70: </tr>
71: </table>
1.56 deraadt 72: <hr>
73:
1.294 david 74: <a name="goals"></a>
1.278 deraadt 75: <ul>
1.294 david 76: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 77:
1.14 deraadt 78: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 79: ONE in the industry for security (if we are not already there). Our
80: open software development model permits us to take a more
81: uncompromising view towards increased security than Sun, SGI, IBM, HP,
82: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 83: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 84: cryptography</a>, we are able to take cryptographic approaches towards
85: fixing security problems.<p>
1.18 deraadt 86:
1.288 matthieu 87: <a name="disclosure"></a>
1.294 david 88: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 89:
1.45 deraadt 90: Like many readers of the
1.196 jufi 91: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 92: BUGTRAQ mailing list</a>,
1.106 deraadt 93: we believe in full disclosure of security problems. In the
94: operating system arena, we were probably the first to embrace
95: the concept. Many vendors, even of free software, still try
96: to hide issues from their users.<p>
97:
98: Security information moves very fast in cracker circles. On the other
99: hand, our experience is that coding and releasing of proper security
100: fixes typically requires about an hour of work -- very fast fix
101: turnaround is possible. Thus we think that full disclosure helps the
102: people who really care about security.<p>
103:
1.288 matthieu 104: <a name="process"></a>
1.294 david 105: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 106:
1.12 deraadt 107: Our security auditing team typically has between six and twelve
1.45 deraadt 108: members who continue to search for and fix new security holes. We
109: have been auditing since the summer of 1996. The process we follow to
110: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 111: every critical software component. We are not so much looking for
112: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 113: years later someone discovers the problem used to be a security
1.106 deraadt 114: issue, and we fixed it because it was just a bug, well, all the
115: better. Flaws have been found in just about every area of the system.
116: Entire new classes of security problems have been found during our
117: audit, and often source code which had been audited earlier needs
118: re-auditing with these new flaws in mind. Code often gets audited
119: multiple times, and by multiple people with different auditing
120: skills.<p>
1.12 deraadt 121:
1.94 deraadt 122: Some members of our security auditing team worked for Secure Networks,
123: the company that made the industry's premier network security scanning
124: software package Ballista (Secure Networks got purchased by Network
125: Associates, Ballista got renamed to Cybercop Scanner, and well...)
126: That company did a lot of security research, and thus fit in well
1.106 deraadt 127: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
128: colours since day 1.<p>
1.31 deraadt 129:
1.34 deraadt 130: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 131: In most cases we have found that the determination of exploitability
132: is not an issue. During our ongoing auditing process we find many
133: bugs, and endeavor to fix them even though exploitability is not
134: proven. We fix the bug, and we move on to find other bugs to fix. We
135: have fixed many simple and obvious careless programming errors in code
136: and only months later discovered that the problems were in fact
137: exploitable. (Or, more likely someone on
1.197 jufi 138: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 139: would report that other operating systems were vulnerable to a `newly
140: discovered problem', and then it would be discovered that OpenBSD had
141: been fixed in a previous release). In other cases we have been saved
142: from full exploitability of complex step-by-step attacks because we
143: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 144: managed such a success is the lpd advisory that Secure Networks put out.
145: <p>
1.29 deraadt 146:
1.288 matthieu 147: <a name="newtech"></a>
1.294 david 148: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 149:
150: As we audit source code, we often invent new ways of solving problems.
151: Sometimes these ideas have been used before in some random application
152: written somewhere, but perhaps not taken to the degree that we do.
153: <p>
154:
155: <ul>
156: <li>strlcpy() and strlcat()
157: <li>Memory protection purify
158: <ul>
159: <li>W^X
160: <li>.rodata segment
161: <li>Guard pages
162: <li>Randomized malloc()
163: <li>Randomized mmap()
164: <li>atexit() and stdio protection
165: </ul>
1.295 otto 166: <li>Privilege separation
1.278 deraadt 167: <li>Privilege revocation
168: <li>Chroot jailing
169: <li>New uids
170: <li>ProPolice
171: <li>... and others
172: </ul>
173: <p>
174:
1.294 david 175: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 176:
1.45 deraadt 177: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 178: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 179: commonplace in security forums like
1.197 jufi 180: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 181:
1.45 deraadt 182: The most intense part of our security auditing happened immediately
1.80 espie 183: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 184: over the last third of 1996 and first half of 1997. Thousands (yes,
185: thousands) of security issues were fixed rapidly over this year-long
186: period; bugs like the standard buffer overflows, protocol
187: implementation weaknesses, information gathering, and filesystem
188: races. Hence most of the security problems that we encountered were
189: fixed before our 2.1 release, and then a far smaller number needed
190: fixing for our 2.2 release. We do not find as many problems anymore,
191: it is simply a case of diminishing returns. Recently the security
192: problems we find and fix tend to be significantly more obscure or
193: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 194:
1.35 deraadt 195: <ul>
1.45 deraadt 196: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 197: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 198: to search for more complicated exploits, so we will too.
199: <li>Finding and fixing subtle flaws in complicated software is
200: a lot of fun.
1.35 deraadt 201: </ul>
1.106 deraadt 202: <p>
1.15 deraadt 203:
1.14 deraadt 204: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 205: to find and fix new security flaws.<p>
1.12 deraadt 206:
1.288 matthieu 207: <a name="default"></a>
1.294 david 208: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 209:
210: To ensure that novice users of OpenBSD do not need to become security
211: experts overnight (a viewpoint which other vendors seem to have), we
212: ship the operating system in a Secure by Default mode. All non-essential
213: services are disabled. As the user/administrator becomes more familiar
214: with the system, he will discover that he has to enable daemons and other
215: parts of the system. During the process of learning how to enable a new
216: service, the novice is more likely to learn of security considerations.<p>
217:
218: This is in stark contrast to the increasing number of systems that
219: ship with NFS, mountd, web servers, and various other services enabled
220: by default, creating instantaneous security problems for their users
221: within minutes after their first install.<p>
222:
1.288 matthieu 223: <a name="crypto"></a>
1.294 david 224: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 225:
226: And of course, since the OpenBSD project is based in Canada, it is possible
227: for us to integrate cryptography. For more information, read the page
1.116 deraadt 228: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 229:
1.294 david 230: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 231:
232: <li>
1.365 deraadt 233: <a name="44"></a>
234:
235: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
236: These are the OpenBSD 4.4 advisories -- all these problems are solved
237: in <a href=anoncvs.html>OpenBSD current</a> and the
238: <a href=stable.html>patch branch</a>.
239:
240: <p>
241: <ul>
1.372 ! millert 242: <li><a href="errata44.html#011_sudo">February 22, 2009:
! 243: sudo(8) may allow a user listed in sudoers to run a command
! 244: as a different user than their access rule specifies when a Unix
! 245: group is used in the RunAs portion of the rule.</a>
1.370 djm 246: <li><a href="errata44.html#008_bind">January 15, 2009:
247: named(8) suffered from a similar logic error that may allow
248: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 249: <li><a href="errata44.html#007_openssl">January 9, 2009:
250: OpenSSL suffered from some logic errors that allowed bypass
251: of DSA/ECDSA certificate validation.</a>
1.367 brad 252: <li><a href="errata44.html#001_ndp">November 2, 2008:
253: The Neighbor Discovery Protocol (ndp) did not correctly verify
254: neighbor solicitation requests maybe allowing a nearby attacker
255: to intercept traffic.</a>
1.365 deraadt 256: </ul>
257:
258: <li>
1.357 brad 259: <a name="43"></a>
260:
261: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
262: These are the OpenBSD 4.3 advisories -- all these problems are solved
263: in <a href=anoncvs.html>OpenBSD current</a> and the
264: <a href=stable.html>patch branch</a>.
265:
266: <p>
267: <ul>
1.372 ! millert 268: <li><a href="errata43.html#011_sudo">February 22, 2009:
! 269: sudo(8) may allow a user listed in sudoers to run a command
! 270: as a different user than their access rule specifies when a Unix
! 271: group is used in the RunAs portion of the rule.</a>
1.370 djm 272: <li><a href="errata43.html#008_bind">January 15, 2009:
273: named(8) suffered from a similar logic error that may allow
274: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 275: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 276: OpenSSL suffered from some logic errors that allowed bypass
277: of DSA/ECDSA certificate validation.</a>
1.363 brad 278: <li><a href="errata43.html#005_ndp">October 2, 2008:
279: The Neighbor Discovery Protocol (ndp) did not correctly verify
280: neighbor solicitation requests maybe allowing a nearby attacker
281: to intercept traffic.</a>
1.362 brad 282: <li><a href="errata43.html#004_bind">July 23, 2008:
283: A vulnerability has been found with BIND.</a>
1.361 brad 284: <li><a href="errata43.html#003_xorg">July 15, 2008:
285: Multiple vulnerabilities in X.Org.</a>
1.359 brad 286: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 287: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 288: <li><a href="errata43.html#001_openssh">March 30, 2008:
289: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 290: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 291: </ul>
292:
1.366 miod 293: <p>
294: OpenBSD 4.2 and earlier releases are not supported anymore. The following
295: paragraphs only list advisories issued while they were maintained; these
296: releases are likely to be affected by the advisories for more recent releases.
297: <br>
1.357 brad 298:
299: <li>
1.348 merdely 300: <a name="42"></a>
301:
302: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
303: These are the OpenBSD 4.2 advisories -- all these problems are solved
304: in <a href=anoncvs.html>OpenBSD current</a> and the
305: <a href=stable.html>patch branch</a>.
306:
307: <p>
308: <ul>
1.364 tobias 309: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 310: The Neighbor Discovery Protocol (ndp) did not correctly verify
311: neighbor solicitation requests maybe allowing a nearby attacker
312: to intercept traffic.</a>
1.362 brad 313: <li><a href="errata42.html#013_bind">July 23, 2008:
314: A vulnerability has been found with BIND.</a>
1.361 brad 315: <li><a href="errata42.html#012_xorg2">July 15, 2008:
316: Multiple vulnerabilities in X.Org.</a>
1.359 brad 317: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 318: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 319: <li><a href="errata42.html#010_openssh">March 30, 2008:
320: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 321: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 322: <li><a href="errata42.html#009_ppp">March 7, 2008:
323: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 324: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
325: Multiple vulnerabilities in X.Org.</a>
1.352 henning 326: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
327: A missing NULL pointer check can lead to a kernel panic.</a>
328: <li><a href="errata42.html#004_pf">Nov 27, 2007:
329: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 330: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
331: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 332: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 333: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 334: </ul>
335:
336: <li>
1.346 matthieu 337: <a name="41"></a>
338:
339: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
340: These are the OpenBSD 4.1 advisories -- all these problems are solved
341: in <a href=anoncvs.html>OpenBSD current</a> and the
342: <a href=stable.html>patch branch</a>.
343:
344: <p>
345: <ul>
1.359 brad 346: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 347: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 348: <li><a href="errata41.html#015_openssh">March 30, 2008:
349: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 350: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 351: <li><a href="errata41.html#014_ppp">March 7, 2008:
352: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 353: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
354: Multiple vulnerabilities in X.Org.</a>
355: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
356: The SSL_get_shared_ciphers() function in OpenSSL contains
357: an off-by-one overflow.</a>
1.350 deraadt 358: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 359: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 360: <li><a href="errata41.html#009_file">Jul 9, 2007:
361: Fix possible heap overflow in file(1).</a>
1.346 matthieu 362: <li><a href="errata41.html#005_route6">Apr 27, 2007:
363: IPv6 type 0 route headers can be used to mount a DoS attack
364: against hosts and networks.</a>
365: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
366: Multiple vulnerabilities in X.Org.</a>
367: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
368: Incorrect mbuf handling for ICMP6 packets.</a>
369: </ul>
370:
371: <li>
1.334 brad 372: <a name="40"></a>
373: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
374: These are the OpenBSD 4.0 advisories -- all these problems are solved
375: in <a href=anoncvs.html>OpenBSD current</a> and the
376: <a href=stable.html>patch branch</a>.
377:
378: <p>
379: <ul>
1.350 deraadt 380: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 381: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 382: <li><a href="errata40.html#015_file">Jul 9, 2007:
383: Fix possible heap overflow in file(1).</a>
1.343 deraadt 384: <li><a href="errata40.html#012_route6">Apr 23, 2007:
385: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 386: against hosts and networks.</a>
1.342 mbalmer 387: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
388: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 389: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
390: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 391: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 392: Insufficient validation in vga(4) may allow an attacker to gain
393: root privileges on some i386 systems.</a>
1.339 deraadt 394: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 395: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 396: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 397: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
398: found by Chris Evans.</a>
1.339 deraadt 399: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 400: Several problems have been found in OpenSSL.</a>
1.339 deraadt 401: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 402: httpd(8) does not sanitize the Expect header from an HTTP request
403: when it is reflected back in an error message, which might allow
404: cross-site scripting (XSS) style attacks.</a>
405: </ul>
406:
407: <li>
1.321 brad 408: <a name="39"></a>
409:
410: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
411: These are the OpenBSD 3.9 advisories -- all these problems are solved
412: in <a href=anoncvs.html>OpenBSD current</a> and the
413: <a href=stable.html>patch branch</a>.
414:
415: <p>
416: <ul>
1.343 deraadt 417: <li><a href="errata39.html#022_route6">Apr 23, 2007:
418: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 419: against hosts and networks.</a>
1.342 mbalmer 420: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
421: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 422: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
423: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 424: <li><a href="errata39.html#agp">Jan 3, 2007:
425: Insufficient validation in vga(4) may allow an attacker to gain
426: root privileges on some i386 systems.</a>
1.336 brad 427: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 428: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 429: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 430: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 431: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 432: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 433: found by Chris Evans.</a>
1.333 deraadt 434: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 435: Several problems have been found in OpenSSL.</a>
1.333 deraadt 436: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 437: httpd(8) does not sanitize the Expect header from an HTTP request
438: when it is reflected back in an error message, which might allow
439: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 440: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 441: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
442: possible for an attacker to construct an invalid signature which
443: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 444: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 445: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 446: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 447: Due to the failure to correctly validate LCP configuration option
448: lengths, it is possible for an attacker to send LCP packets via an
449: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 450: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 451: A problem in isakmpd(8) caused IPsec to run partly without replay
452: protection.</a>
1.333 deraadt 453: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 454: It is possible to cause the kernel to panic when more than the default
455: number of sempahores have been allocated.</a>
1.333 deraadt 456: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 457: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
458: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
459: option.</a>
1.333 deraadt 460: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 461: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 462: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 463: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
464: overflow.</a>
1.333 deraadt 465: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 466: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 467: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 468: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 469: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 470: A race condition has been reported to exist in the handling by sendmail
471: of asynchronous signals.</a>
472: </ul>
473:
474: <li>
1.318 deraadt 475: <a name="38"></a>
476:
477: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
478: These are the OpenBSD 3.8 advisories -- all these problems are solved
479: in <a href=anoncvs.html>OpenBSD current</a> and the
480: <a href=stable.html>patch branch</a>.
481:
482: <p>
483: <ul>
1.332 brad 484: <li><a href="errata38.html#ssh2">Oct 12, 2006:
485: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 486: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 487: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 488: found by Chris Evans.</a>
489: <li><a href="errata38.html#openssl2">Oct 7, 2006:
490: Several problems have been found in OpenSSL.</a>
491: <li><a href="errata38.html#httpd2">Oct 7, 2006:
492: httpd(8) does not sanitize the Expect header from an HTTP request
493: when it is reflected back in an error message, which might allow
494: cross-site scripting (XSS) style attacks.</a>
1.329 brad 495: <li><a href="errata38.html#openssl">Sep 8, 2006:
496: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
497: possible for an attacker to construct an invalid signature which
498: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 499: <li><a href="errata38.html#bind">Sep 8, 2006:
500: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 501: <li><a href="errata38.html#sppp">Sep 2, 2006:
502: Due to the failure to correctly validate LCP configuration option
503: lengths, it is possible for an attacker to send LCP packets via an
504: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 505: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
506: A problem in isakmpd(8) caused IPsec to run partly without replay
507: protection.</a>
508: <li><a href="errata38.html#sem">Aug 25, 2006:
509: It is possible to cause the kernel to panic when more than the default
510: number of sempahores have been allocated.</a>
511: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
512: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
513: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
514: option.</a>
515: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
516: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 517: <li><a href="errata38.html#httpd">Jul 30, 2006:
518: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
519: overflow.</a>
1.324 brad 520: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
521: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 522: <li><a href="errata38.html#xorg">May 2, 2006:
523: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 524: <li><a href="errata38.html#sendmail">Mar 25, 2006:
525: A race condition has been reported to exist in the handling by sendmail
526: of asynchronous signals.</a>
527: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 528: Josh Bressers has reported a weakness in OpenSSH caused due to the
529: insecure use of the system(3) function in scp(1) when performing copy
530: operations using filenames that are supplied by the user from the
531: command line.</a>
1.321 brad 532: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 533: Do not allow users to trick suid programs into re-opening files via
534: /dev/fd.</a>
1.321 brad 535: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 536: A buffer overflow has been found in the Perl interpreter with the
537: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 538: </ul>
539:
540: <li>
1.312 david 541: <a name="37"></a>
542:
543: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
544: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 545: in <a href="anoncvs.html">OpenBSD current</a>. The
546: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
547: you should update your machine.
1.312 david 548:
549: <p>
550: <ul>
1.322 brad 551: <li><a href="errata37.html#xorg">May 2, 2006:
552: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 553: <li><a href="errata37.html#sendmail">Mar 25, 2006:
554: A race condition has been reported to exist in the handling by sendmail
555: of asynchronous signals.</a>
1.320 brad 556: <li><a href="errata37.html#ssh">Feb 12, 2006:
557: Josh Bressers has reported a weakness in OpenSSH caused due to the
558: insecure use of the system(3) function in scp(1) when performing copy
559: operations using filenames that are supplied by the user from the
560: command line.</a>
1.319 brad 561: <li><a href="errata37.html#fd">Jan 5, 2006:
562: Do not allow users to trick suid programs into re-opening files via
563: /dev/fd.</a>
564: <li><a href="errata37.html#perl">Jan 5, 2006:
565: A buffer overflow has been found in the Perl interpreter with the
566: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 567: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 568: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 569: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 570: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 571: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 572: Fix a race condition in sudo(8) that could allow a user
1.315 millert 573: to run arbitrary commands.</a>
1.318 deraadt 574: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 575: Fix a buffer overflow, memory leaks, and NULL pointer
576: dereference in cvs(1).</a>
1.312 david 577: </ul>
578:
579: <li>
1.301 miod 580: <a name="36"></a>
581:
582: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
583: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 584: in <a href="anoncvs.html">OpenBSD current</a>. The
585: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
586: you should update your machine.
1.301 miod 587:
588: <p>
1.302 markus 589: <ul>
1.317 millert 590: <li><a href="errata36.html#libz2">Jul 21, 2005:
591: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 592: <li><a href="errata36.html#libz">Jul 6, 2005:
593: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 594: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 595: Fix a race condition in sudo(8) that could allow a user
1.315 millert 596: to run arbitrary commands.</a>
1.311 deraadt 597: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 598: Fix a buffer overflow, memory leaks, and NULL pointer
599: dereference in cvs(1).</a>
1.311 deraadt 600: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 601: Due to buffer overflows in telnet(1), a malicious
602: server or man-in-the-middle attack could allow
603: execution of arbitrary code with the privileges of
604: the user invoking telnet(1).</a>
1.311 deraadt 605: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 606: More stringent checking should be done in the copy(9)
607: functions to prevent their misuse.</a>
1.311 deraadt 608: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 609: More stringent checking should be done in the copy(9)
610: functions to prevent their misuse.</a>
1.311 deraadt 611: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 612: httpd(8)'s mod_include module fails to properly validate
613: the length of user supplied tag strings prior to copying
1.305 brad 614: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 615: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 616: On systems running isakmpd(8) it is possible for a local
617: user to cause kernel memory corruption and system panic by
1.303 markus 618: setting ipsec(4) credentials on a socket.</a>
1.302 markus 619: </ul>
1.301 miod 620:
621: <li>
1.288 matthieu 622: <a name="35"></a>
1.279 deraadt 623:
1.294 david 624: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 625: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 626: in <a href="anoncvs.html">OpenBSD current</a>. The
627: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
628: you should update your machine.
1.279 deraadt 629:
630: <p>
631: <ul>
1.310 brad 632: <li><a href="errata35.html#cvs4">Apr 28, 2005:
633: Fix a buffer overflow, memory leaks, and NULL pointer
634: dereference in cvs(1).</a>
1.309 brad 635: <li><a href="errata35.html#telnet">Mar 30, 2005:
636: Due to buffer overflows in telnet(1), a malicious
637: server or man-in-the-middle attack could allow
638: execution of arbitrary code with the privileges of
639: the user invoking telnet(1).</a>
1.308 brad 640: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 641: More stringent checking should be done in the copy(9)
642: functions to prevent their misuse.</a>
1.306 brad 643: <li><a href="errata35.html#locore">Feb 28, 2005:
644: More stringent checking should be done in the copy(9)
645: functions to prevent their misuse.</a>
1.304 brad 646: <li><a href="errata35.html#httpd3">Jan 12, 2005:
647: httpd(8)'s mod_include module fails to properly validate
648: the length of user supplied tag strings prior to copying
1.305 brad 649: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 650: <li><a href="errata35.html#pfkey">Dec 14, 2004:
651: On systems running isakmpd(8) it is possible for a local
652: user to cause kernel memory corruption and system panic by
1.303 markus 653: setting ipsec(4) credentials on a socket.</a>
1.301 miod 654: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 655: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 656: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 657: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 658: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 659: httpd(8)'s mod_rewrite module can be made to write one zero byte in
660: an arbitrary memory position outside of a char array, causing a DoS
661: or possibly buffer overflows.</a>
1.301 miod 662: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 663: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 664: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 665: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 666: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 667: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 668: Multiple remote vulnerabilities have been found in the cvs(1)
669: server which can be used by CVS clients to crash or execute
1.293 brad 670: arbitrary code on the server.</a>
1.301 miod 671: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 672: kdc(8) performs inadequate checking of request fields, leading
673: to the possibility of principal impersonation from other
674: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 675: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 676: xdm(1) ignores the requestPort resource and creates a
1.293 brad 677: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 678: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 679: A buffer overflow in the cvs(1) server has been found,
680: which can be used by CVS clients to execute arbitrary code on
1.293 brad 681: the server.</a>
1.301 miod 682: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 683: Integer overflow problems were found in procfs, allowing
1.293 brad 684: reading of arbitrary kernel memory.</a>
1.301 miod 685: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 686: Pathname validation problems have been found in cvs(1),
687: allowing clients and servers access to files outside the
1.293 brad 688: repository or local CVS tree.</a>
1.279 deraadt 689: </ul>
690:
691: <p>
692: <li>
1.288 matthieu 693: <a name="34"></a>
1.261 david 694:
1.294 david 695: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 696: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 697: in <a href="anoncvs.html">OpenBSD current</a>. The
698: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
699: you should update your machine.
1.261 david 700: <p>
701: <ul>
1.302 markus 702: <li><a href="errata34.html#pfkey">Dec 14, 2004:
703: On systems running isakmpd(8) it is possible for a local
704: user to cause kernel memory corruption and system panic by
1.303 markus 705: setting ipsec(4) credentials on a socket.</a>
1.298 brad 706: <li><a href="errata34.html#xpm">Sep 16, 2004:
707: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 708: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
709: httpd(8)'s mod_rewrite module can be made to write one zero byte in
710: an arbitrary memory position outside of a char array, causing a DoS
711: or possibly buffer overflows.</a>
1.294 david 712: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 713: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 714: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 715: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 716: an attacker can delete IPsec tunnels at will.</a>
1.294 david 717: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 718: Multiple remote vulnerabilities have been found in the cvs(1)
719: server which can be used by CVS clients to crash or execute
1.293 brad 720: arbitrary code on the server.</a>
1.294 david 721: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 722: kdc(8) performs inadequate checking of request fields, leading
723: to the possibility of principal impersonation from other
724: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 725: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 726: A buffer overflow in the cvs(1) server has been found,
727: which can be used by CVS clients to execute arbitrary code on
728: the server.</a>
1.294 david 729: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 730: Integer overflow problems were found in procfs, allowing
731: reading of arbitrary kernel memory.</a>
1.294 david 732: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 733: Pathname validation problems have been found in cvs(1),
734: allowing clients and servers access to files outside the
735: repository or local CVS tree.</a>
1.294 david 736: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 737: A missing check for a NULL-pointer dereference may allow a
1.281 otto 738: remote attacker to crash applications using OpenSSL.</a>
1.294 david 739: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 740: Defects in the payload validation and processing functions of
741: isakmpd have been discovered. An attacker could send malformed
742: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 743: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 744: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
745: access module, using IP addresses without a netmask on big endian
746: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 747: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 748: An IPv6 MTU handling problem exists that could be used by an
749: attacker to cause a denial of service attack.</a>
1.294 david 750: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 751: A reference counting bug in shmat(2) could be used to write to
752: kernel memory under certain circumstances.</a>
1.294 david 753: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 754: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 755: by Thomas Walpuski.</a>
1.294 david 756: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 757: It may be possible for a local user to overrun the stack in
758: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 759: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 760: The use of certain ASN.1 encodings or malformed public keys may
761: allow an attacker to mount a denial of service attack against
762: applications linked with ssl(3).</a>
1.261 david 763: </ul>
764:
765: <li>
1.288 matthieu 766: <a name="33"></a>
1.246 deraadt 767:
1.294 david 768: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 769: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 770: in <a href="anoncvs.html">OpenBSD current</a>. The
771: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 772: you should update your machine.
1.246 deraadt 773: <p>
774: <ul>
1.294 david 775: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 776: Pathname validation problems have been found in cvs(1),
777: allowing clients and servers access to files outside the
778: repository or local CVS tree.</a>
1.294 david 779: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 780: A missing check for a NULL-pointer dereference may allow a
1.281 otto 781: remote attacker to crash applications using OpenSSL.</a>
1.294 david 782: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 783: Defects in the payload validation and processing functions of
784: isakmpd have been discovered. An attacker could send malformed
785: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 786: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 787: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
788: access module, using IP addresses without a netmask on big endian
789: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 790: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 791: An IPv6 MTU handling problem exists that could be used by an
792: attacker to cause a denial of service attack.</a>
1.294 david 793: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 794: A reference counting bug in shmat(2) could be used to write to
795: kernel memory under certain circumstances.</a>
1.294 david 796: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 797: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 798: by Thomas Walpuski.</a>
1.294 david 799: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 800: It may be possible for a local user to execute arbitrary code
801: resulting in escalation of privileges due to a stack overrun
802: in compat_ibcs2(8).</a>
1.294 david 803: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 804: The use of certain ASN.1 encodings or malformed public keys may
805: allow an attacker to mount a denial of service attack against
806: applications linked with ssl(3).</a>
1.294 david 807: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 808: Access of freed memory in pf(4) could be used to
1.260 margarid 809: remotely panic a machine using scrub rules.</a>
1.294 david 810: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 811: A buffer overflow in the address parsing in
812: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 813: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 814: OpenSSH versions prior to 3.7 contains a buffer management error
815: that is potentially exploitable.</a>
1.294 david 816: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 817: Root may be able to reduce the security level by taking advantage of
818: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 819: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 820: An improper bounds check in the kernel may allow a local user
821: to panic the kernel.</a>
1.294 david 822: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 823: An off-by-one error exists in the C library function realpath(3)
824: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 825: </ul>
826:
1.265 miod 827:
1.247 david 828: <p>
1.246 deraadt 829: <li>
1.288 matthieu 830: <a name="32"></a>
1.224 deraadt 831:
1.294 david 832: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 833: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 834: in <a href="anoncvs.html">OpenBSD current</a>. The
835: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 836: you should update your machine.
1.224 deraadt 837: <p>
838: <ul>
1.294 david 839: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 840: The use of certain ASN.1 encodings or malformed public keys may
841: allow an attacker to mount a denial of service attack against
842: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 843: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 844: Access of freed memory in pf(4) could be used to
1.260 margarid 845: remotely panic a machine using scrub rules.</a>
1.294 david 846: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 847: A buffer overflow in the address parsing in
848: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 849: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 850: OpenSSH versions prior to 3.7 contains a buffer management error
851: that is potentially exploitable.</a>
1.294 david 852: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 853: Fix for a potential security issue in
854: sendmail(8) with respect to DNS maps.</a>
1.294 david 855: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 856: An off-by-one error exists in the C library function realpath(3)
857: may allow an attacker to gain escalated privileges.</a>
1.294 david 858: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 859: A buffer overflow in the address parsing in
860: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 861: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 862: A cryptographic weaknesses in the Kerberos v4 protocol can be
863: exploited on Kerberos v5 as well.</a>
1.294 david 864: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 865: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 866: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 867: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 868: Various SSL and TLS operations in OpenSSL are vulnerable to
869: timing attacks.</a>
1.294 david 870: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 871: A buffer overflow in lprm(1) may allow an attacker to elevate
872: privileges to user daemon.</a>.
1.294 david 873: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 874: A buffer overflow in the envelope comments processing in
875: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 876: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 877: httpd(8) leaks file inode numbers via ETag header as well as
878: child PIDs in multipart MIME boundary generation. This could
879: lead, for example, to NFS exploitation because it uses inode
880: numbers as part of the file handle.</a>
1.294 david 881: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 882: In ssl(8) an information leak can occur via timing by performing
883: a MAC computation even if incorrect block cipher padding has
884: been found, this is a countermeasure. Also, check for negative
885: sizes, in allocation routines.</a>
1.294 david 886: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 887: A double free exists in cvs(1) that could lead to privilege
888: escalation for cvs configurations where the cvs command is
1.233 margarid 889: run as a privileged user.</a>
1.294 david 890: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 891: A buffer overflow exists in named(8) that could lead to a
892: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 893: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 894: A logic error in the pool kernel memory allocator could cause
895: memory corruption in low-memory situations, causing the system
896: to crash.</a>
1.294 david 897: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 898: An attacker can bypass smrsh(8)'s restrictions and execute
899: arbitrary commands with the privileges of his own account.</a>
1.294 david 900: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 901: Network bridges running pf with scrubbing enabled could cause
902: mbuf corruption, causing the system to crash.</a>
1.294 david 903: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 904: A buffer overflow can occur in the kadmind(8) daemon, leading
905: to possible remote crash or exploit.</a>
1.224 deraadt 906: </ul>
907:
1.227 miod 908: <p>
909: <li>
1.288 matthieu 910: <a name="31"></a>
1.203 deraadt 911:
1.294 david 912: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 913: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 914: in <a href="anoncvs.html">OpenBSD current</a>. The
915: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 916: you should update your machine.
1.203 deraadt 917:
918: <p>
919: <ul>
1.294 david 920: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 921: A buffer overflow in the address parsing in
922: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 923: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 924: A cryptographic weaknesses in the Kerberos v4 protocol can be
925: exploited on Kerberos v5 as well.</a>
1.294 david 926: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 927: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 928: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 929: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 930: Various SSL and TLS operations in OpenSSL are vulnerable to
931: timing attacks.</a>
1.294 david 932: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 933: A buffer overflow in lprm(1) may allow an attacker to gain
934: root privileges.</a>
1.294 david 935: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 936: A buffer overflow in the envelope comments processing in
937: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 938: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 939: In ssl(8) an information leak can occur via timing by performing
940: a MAC computation even if incorrect block cipher padding has
941: been found, this is a countermeasure. Also, check for negative
942: sizes, in allocation routines.</a>
1.294 david 943: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 944: A double free exists in cvs(1) that could lead to privilege
945: escalation for cvs configurations where the cvs command is
1.294 david 946: run as a privileged user</a>.
947: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 948: A buffer overflow exists in named(8) that could lead to a
949: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 950: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 951: Incorrect argument checking in the getitimer(2) system call
952: may allow an attacker to crash the system.</a>
1.294 david 953: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 954: An attacker can bypass smrsh(8)'s restrictions and execute
955: arbitrary commands with the privileges of his own account.</a>
1.294 david 956: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 957: A buffer overflow can occur in the kadmind(8) daemon, leading
958: to possible remote crash or exploit.</a>
1.294 david 959: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 960: Incorrect argument checking in the setitimer(2) system call
961: may allow an attacker to write to kernel memory.</a>
1.294 david 962: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 963: An insufficient boundary check in the select system call
1.220 miod 964: allows an attacker to overwrite kernel memory and execute arbitrary code
965: in kernel context.</a>
1.294 david 966: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 967: Several remote buffer overflows can occur in the SSL2 server and SSL3
968: client of the ssl(8) library, as in the ASN.1 parser code in the
969: crypto(3) library, all of them being potentially remotely
970: exploitable.</a>
1.294 david 971: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 972: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
973: possible remote crash.</a>
1.294 david 974: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 975: A race condition exists in the pppd(8) daemon which may cause it to
976: alter the file permissions of an arbitrary file.</a>
1.294 david 977: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 978: Receiving IKE payloads out of sequence can cause isakmpd(8) to
979: crash.</a>
1.294 david 980: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 981: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 982: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 983: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 984: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 985: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 986: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 987: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 988: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 989: input validation error that can result in an integer overflow and
990: privilege escalation.</a>
1.294 david 991: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 992: A buffer overflow can occur during the interpretation of chunked
993: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 994: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 995: Under certain conditions, on systems using YP with netgroups
996: in the password database, it is possible that sshd(8) does
997: ACL checks for the requested user name but uses the password
998: database entry of a different user for authentication. This
999: means that denied users might authenticate successfully
1000: while permitted users could be locked out.</a>
1.294 david 1001: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 1002: A race condition exists that could defeat the kernel's
1003: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1004: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 1005: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1006: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 1007: A local user can gain super-user privileges due to a buffer
1008: overflow in sshd(8) if AFS has been configured on the system
1009: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1010: in the sshd_config file.</a>
1.203 deraadt 1011: </ul>
1012:
1.235 miod 1013: <p>
1.203 deraadt 1014: <li>
1.288 matthieu 1015: <a name="30"></a>
1.187 deraadt 1016:
1.294 david 1017: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1018: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1019: in <a href="anoncvs.html">OpenBSD current</a>. The
1020: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1021: you should update your machine.
1.187 deraadt 1022:
1023: <p>
1024: <ul>
1.294 david 1025: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1026: A buffer overflow exists in named(8) that could lead to a
1027: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1028: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1029: Incorrect argument checking in the getitimer(2) system call
1030: may allow an attacker to crash the system.</a>
1.294 david 1031: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1032: An attacker can bypass smrsh(8)'s restrictions and execute
1033: arbitrary commands with the privileges of his own account.</a>
1.294 david 1034: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1035: A buffer overflow can occur in the kadmind(8) daemon, leading
1036: to possible remote crash or exploit.</a>
1.294 david 1037: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1038: Incorrect argument checking in the setitimer(2) system call
1039: may allow an attacker to write to kernel memory.</a>
1.294 david 1040: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1041: An insufficient boundary check in the select and poll system calls
1042: allows an attacker to overwrite kernel memory and execute arbitrary code
1043: in kernel context.</a>
1.294 david 1044: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1045: Several remote buffer overflows can occur in the SSL2 server and SSL3
1046: client of the ssl(8) library, as in the ASN.1 parser code in the
1047: crypto(3) library, all of them being potentially remotely
1048: exploitable.</a>
1.294 david 1049: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1050: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1051: possible remote crash.</a>
1.294 david 1052: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1053: A race condition exists in the pppd(8) daemon which may cause it to
1054: alter the file permissions of an arbitrary file.</a>
1.294 david 1055: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1056: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1057: crash.</a>
1.294 david 1058: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1059: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1060: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1061: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1062: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1063: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1064: input validation error that can result in an integer overflow and
1065: privilege escalation.</a>
1.294 david 1066: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1067: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1068: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1069: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1070: A buffer overflow can occur during the interpretation of chunked
1071: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1072: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1073: A race condition exists that could defeat the kernel's
1074: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1075: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1076: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1077: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1078: A local user can gain super-user privileges due to a buffer
1079: overflow in sshd(8) if AFS has been configured on the system
1080: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1081: in the sshd_config file.</a>
1.294 david 1082: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1083: The mail(1) was interpreting tilde escapes even when invoked
1084: in non-interactive mode. As mail(1) is called as root from cron,
1085: this can lead to a local root compromise.</a>
1.294 david 1086: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1087: Under certain conditions, on systems using YP with netgroups in
1088: the password database, it is possible for the rexecd(8) and rshd(8)
1089: daemons to execute a shell from a password database entry for a
1090: different user. Similarly, atrun(8) may change to the wrong
1091: home directory when running jobs.</a>
1.294 david 1092: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1093: A potential double free() exists in the zlib library;
1094: this is not exploitable on OpenBSD.
1095: The kernel also contains a copy of zlib; it is not
1096: currently known if the kernel zlib is exploitable.</a>
1.294 david 1097: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1098: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1099: may allow a local user to gain super-user privileges.</a>
1.294 david 1100: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1101: A race condition between the ptrace(2) and execve(2) system calls
1102: allows an attacker to modify the memory contents of suid/sgid
1103: processes which could lead to compromise of the super-user account.</a>
1.294 david 1104: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1105: There is a security hole in sudo(8) that can be exploited
1106: when the Postfix sendmail replacement is installed that may
1107: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1108: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1109: An attacker can trick a machine running the lpd daemon into
1110: creating new files in the root directory from a machine with
1111: remote line printer access.</a>
1.294 david 1112: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1113: The vi.recover script can be abused in such a way as
1114: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1115: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1116: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1117: resulting in a crash.</a>
1.294 david 1118: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1119: A security hole that may allow an attacker to partially authenticate
1120: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1121: </ul>
1122:
1123: <p>
1124: <li>
1.288 matthieu 1125: <a name="29"></a>
1.173 deraadt 1126:
1.294 david 1127: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1128: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1129: in <a href="anoncvs.html">OpenBSD current</a>. The
1130: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1131: you should update your machine.
1132:
1.173 deraadt 1133:
1134: <p>
1135: <ul>
1.294 david 1136: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1137: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1138: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1139: A race condition exists that could defeat the kernel's
1140: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1141: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1142: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1143: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1144: A local user can gain super-user privileges due to a buffer
1145: overflow in sshd(8) if AFS has been configured on the system
1146: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1147: in the sshd_config file.</a>
1.294 david 1148: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1149: The mail(1) was interpreting tilde escapes even when invoked
1150: in non-interactive mode. As mail(1) is called as root from cron,
1151: this can lead to a local root compromise.</a>
1.294 david 1152: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1153: A potential double free() exists in the zlib library;
1154: this is not exploitable on OpenBSD.
1155: The kernel also contains a copy of zlib; it is not
1156: currently known if the kernel zlib is exploitable.</a>
1.294 david 1157: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1158: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1159: may allow a local user to gain super-user privileges.</a>
1.294 david 1160: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1161: A race condition between the ptrace(2) and execve(2) system calls
1162: allows an attacker to modify the memory contents of suid/sgid
1163: processes which could lead to compromise of the super-user account.</a>
1.294 david 1164: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1165: There is a security hole in sudo(8) that can be exploited
1166: when the Postfix sendmail replacement is installed that may
1167: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1168: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1169: An attacker can trick a machine running the lpd daemon into
1170: creating new files in the root directory from a machine with
1171: remote line printer access.</a>
1.294 david 1172: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1173: The vi.recover script can be abused in such a way as
1174: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1175: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1176: A security hole exists in uuxqt(8) that may allow an
1177: attacker to gain root privileges.</a>
1.294 david 1178: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1179: A security hole exists in lpd(8) that may allow an
1180: attacker to gain root privileges if lpd is running.</a>
1.294 david 1181: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1182: A security hole exists in sendmail(8) that may allow an
1183: attacker on the local host to gain root privileges.</a>
1.294 david 1184: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1185: A kernel buffer overflow in the NFS code can be used to execute
1186: arbitrary code by users with mount privileges (only root by
1.181 millert 1187: default).</a>
1.294 david 1188: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1189: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1190: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1191: sshd(8) allows users to delete arbitrary files named "cookies"
1192: if X11 forwarding is enabled. X11 forwarding is disabled
1193: by default.</a>
1.294 david 1194: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1195: Programs using the fts routines can be tricked into changing
1196: into the wrong directory.</a>
1.294 david 1197: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1198: Sendmail signal handlers contain unsafe code,
1199: leading to numerous race conditions.</a>
1.173 deraadt 1200: </ul>
1201:
1202: <p>
1203: <li>
1.288 matthieu 1204: <a name="28"></a>
1.152 deraadt 1205:
1.294 david 1206: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1207: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1208: in <a href="anoncvs.html">OpenBSD current</a>. The
1209: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1210: you should update your machine.
1211:
1.152 deraadt 1212:
1213: <p>
1214: <ul>
1.294 david 1215: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1216: A security hole exists in uuxqt(8) that may allow an
1217: attacker to gain root privileges.</a>
1.294 david 1218: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1219: A security hole exists in lpd(8) that may allow an
1220: attacker to gain root privileges if lpd is running.</a>
1.294 david 1221: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1222: A security hole exists in sendmail(8) that may allow an
1223: attacker on the local host to gain root privileges.</a>
1.294 david 1224: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1225: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1226: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1227: Programs using the fts routines can be tricked into changing
1228: into the wrong directory.</a>
1.294 david 1229: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1230: Sendmail signal handlers contain unsafe code,
1231: leading to numerous race conditions.</a>
1.294 david 1232: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1233: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1234: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1235: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1236: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1237: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1238: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1239: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1240: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1241: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1242: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1243: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1244: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1245: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1246: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1247: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1248: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1249: rnd(4) did not use all of its input when written to.</a>
1.294 david 1250: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1251: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1252: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1253: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1254: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1255: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1256: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1257: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1258: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1259: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1260: </ul>
1261:
1262: <p>
1263: <li>
1.288 matthieu 1264: <a name="27"></a>
1.124 deraadt 1265:
1.294 david 1266: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1267: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1268: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1269: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1270:
1271: <p>
1272: <ul>
1.294 david 1273: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1274: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1275: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1276: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1277: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1278: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1279: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1280: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1281: (patch included)</a>
1.294 david 1282: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1283: X11 libraries have 2 potential overflows in xtrans code.
1284: (patch included)</a>
1.294 david 1285: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1286: Apache mod_rewrite and mod_vhost_alias modules could expose files
1287: on the server in certain configurations if used.
1288: (patch included)</a>
1.294 david 1289: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1290: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1291: TERMPATH and TERMCAP environment variables as it should.
1292: (patch included)</a>
1.294 david 1293: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1294: There are printf-style format string bugs in several privileged
1295: programs. (patch included)</a>
1.294 david 1296: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1297: libcurses honored terminal descriptions in the $HOME/.terminfo
1298: directory as well as in the TERMCAP environment variable for
1299: setuid and setgid applications.
1.146 deraadt 1300: (patch included)</a>
1.294 david 1301: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1302: A format string vulnerability exists in talkd(8).
1303: (patch included)</a>
1.294 david 1304: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1305: A format string vulnerability exists in the pw_error() function of the
1306: libutil library, yielding localhost root through chpass(1).
1307: (patch included)</a>
1.294 david 1308: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1309: Bad ESP/AH packets could cause a crash under certain conditions.
1310: (patch included)</a>
1.294 david 1311: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1312: A format string vulnerability (localhost root) exists in xlock(1).
1313: (patch included)</a>
1.294 david 1314: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1315: Various bugs found in X11 libraries have various side effects, almost
1316: completely denial of service in OpenBSD.
1317: (patch included)</a>
1.294 david 1318: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1319: Just like pretty much all the other unix ftp daemons
1320: on the planet, ftpd had a remote root hole in it.
1321: Luckily, ftpd was not enabled by default.
1.137 deraadt 1322: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1323: (patch included)</a>
1.294 david 1324: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1325: Mopd, very rarely used, contained some buffer overflows.
1326: (patch included)</a>
1.294 david 1327: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1328: libedit would check for a <b>.editrc</b> file in the current
1329: directory. Not known to be a real security issue, but a patch
1330: is available anyways.
1331: (patch included)</a>
1.294 david 1332: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1333: A serious bug in dhclient(8) could allow strings from a
1334: malicious dhcp server to be executed in the shell as root.
1335: (patch included)</a>
1.294 david 1336: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1337: A serious bug in isakmpd(8) policy handling wherein
1338: policy verification could be completely bypassed in isakmpd.
1339: (patch included)</a>
1.294 david 1340: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1341: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1342: should not be used, and results in security problems on
1343: other operating systems.</a>
1.294 david 1344: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1345: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1346: (patch included)</a>
1.294 david 1347: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1348: Improper use of ipf <i>keep-state</i> rules can result
1349: in firewall rules being bypassed. (patch included)</a>
1350:
1.124 deraadt 1351: </ul>
1352:
1353: <p>
1354: <li>
1.288 matthieu 1355: <a name="26"></a>
1.119 deraadt 1356:
1.294 david 1357: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1358: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1359: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1360: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1361:
1362: <p>
1363: <ul>
1.294 david 1364: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1365: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1366: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1367: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1368: Improper use of ipf <i>keep-state</i> rules can result
1369: in firewall rules being bypassed. (patch included)</a>
1.294 david 1370: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1371: xlockmore has a bug which a localhost attacker can use to gain
1372: access to the encrypted root password hash (which is normally
1.245 miod 1373: encoded using blowfish</a> (see
1.294 david 1374: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1375: crypt(3)</a>)
1.245 miod 1376: (patch included).
1.294 david 1377: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1378: Systems running with procfs enabled and mounted are
1379: vulnerable to a very tricky exploit. procfs is not
1380: mounted by default.
1381: (patch included).</a>
1.294 david 1382: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1383: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1384: thus exposing the system to a race where the aliases file
1385: did not exist.
1.119 deraadt 1386: (patch included).</a>
1.294 david 1387: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1388: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1389: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1390: A buffer overflow in the RSAREF code included in the
1391: USA version of libssl, is possibly exploitable in
1392: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1393: (patch included).<br></a>
1394: <strong>Update:</strong> Turns out that this was not exploitable
1395: in any of the software included in OpenBSD 2.6.
1.294 david 1396: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1397: Any user could change interface media configurations, resulting in
1398: a localhost denial of service attack.
1.121 deraadt 1399: (patch included).</a>
1.119 deraadt 1400: </ul>
1401:
1402: <p>
1403: <li>
1.288 matthieu 1404: <a name="25"></a>
1.106 deraadt 1405:
1.294 david 1406: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1407: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1408: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1409: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1410:
1.96 deraadt 1411: <p>
1.104 deraadt 1412: <ul>
1.294 david 1413: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1414: In cron(8), make sure argv[] is NULL terminated in the
1415: fake popen() and run sendmail as the user, not as root.
1416: (patch included).</a>
1.294 david 1417: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1418: filesystems had an overrun in their handling of uio_offset
1419: in their readdir() routines. (These filesystems are not
1420: enabled by default). (patch included).</a>
1.294 david 1421: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1422: when we execve() a new process. (patch included).</a>
1.294 david 1423: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1424: been handled by IPsec may be transmitted as cleartext.
1425: PF_KEY SA expirations may leak kernel resources.
1426: (patch included).</a>
1.294 david 1427: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1428: motd re-writing and change the find(1) to use -execdir
1429: (patch included).</a>
1.294 david 1430: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1431: users to chflags(2) or fchflags(2) on character or block devices
1432: which they may currently be the owner of (patch included).</a>
1.294 david 1433: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1434: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1435: </ul>
1436:
1.106 deraadt 1437: <p>
1438: <li>
1.288 matthieu 1439: <a name="24"></a>
1.235 miod 1440:
1.294 david 1441: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1442: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1443: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1444: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1445:
1.96 deraadt 1446: <p>
1.75 deraadt 1447: <ul>
1.294 david 1448: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1449: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1450: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1451: another kernel crash case caused by the <strong>crashme</strong>
1452: program (patch included).</a>
1.294 david 1453: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1454: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1455: (patch included).</a>
1.294 david 1456: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1457: existed in ping(8). (patch included).</a>
1.294 david 1458: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1459: the ipq, which could permit an attacker to cause a crash.
1460: (patch included).</a>
1.294 david 1461: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1462: kernel between accept(2) and select(2) could permit an attacker
1463: to hang sockets from remote.
1464: (patch included).</a>
1.294 david 1465: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1466: bog the machine excessively and cause problems.
1467: (patch included).</a>
1.294 david 1468: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1469: DDB interacted to possibly cause a crash.
1470: (patch included).</a>
1.294 david 1471: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1472: (patch included).</a>
1.294 david 1473: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1474: problem in bootpd(8). (patch included).</a>
1.294 david 1475: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1476: exploitable problem relating to environment variables in termcap
1477: and curses. (patch included).</a>
1.294 david 1478: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1479: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1480: </ul>
1481:
1.106 deraadt 1482: <p>
1483: <li>
1.288 matthieu 1484: <a name="23"></a>
1.235 miod 1485:
1.294 david 1486: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1487: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1488: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1489: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1490:
1.96 deraadt 1491: <p>
1.53 matthieu 1492: <ul>
1.294 david 1493: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1494: problem in bootpd(8). (patch included).</a>
1.294 david 1495: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1496: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1497: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1498: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1499: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1500: chpass(1) has a file descriptor leak which allows an
1501: attacker to modify /etc/master.passwd.</a>
1.294 david 1502: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1503: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1504: should not be executed with fd slots 0, 1, or 2 free.
1505: (patch included).</a>
1.294 david 1506: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1507: libraries (patches included).</a>
1.294 david 1508: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1509: processes too permissive (4th revision patch included).</a>
1.294 david 1510: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1511: of immutable and append-only file flags. (patch included).</a>
1.294 david 1512: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1513: if IPSEC is enabled (patch included).</a>
1.294 david 1514: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1515: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1516: </ul>
1.9 deraadt 1517:
1.106 deraadt 1518: <p>
1519: <li>
1.288 matthieu 1520: <a name="22"></a>
1.235 miod 1521:
1.294 david 1522: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1523: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1524: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1525: still exist in other operating systems. (The supplied patches are for
1526: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1527:
1.96 deraadt 1528: <p>
1.9 deraadt 1529: <ul>
1.294 david 1530: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1531: packets if IPSEC is enabled (patch included).</a>
1.294 david 1532: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1533: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1534: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1535: (patch included).</a>
1.294 david 1536: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1537: (patch included).</a>
1.294 david 1538: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1539: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1540: (patch included).</a>
1.294 david 1541: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1542: export (patch included).</a>
1.112 philen 1543: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1544: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1545: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1546: Acceptance.</a>
1.294 david 1547: A patch is available <a href="errata22.html#sourceroute">here</a>.
1548: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1549: flaw (patch included).</a>
1.294 david 1550: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1551: </ul>
1552:
1.106 deraadt 1553: <p>
1554: <li>
1.288 matthieu 1555: <a name="21"></a>
1.235 miod 1556:
1.294 david 1557: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1558: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1559: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1560: exist in other operating systems. (If you are running OpenBSD 2.1, we
1561: would strongly recommend an upgrade to the newest release, as this
1562: patch list only attempts at fixing the most important security
1563: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1564: security problems. Many of those problems were solved in ways which
1565: make it hard for us to provide patches).
1566:
1.96 deraadt 1567: <p>
1.52 deraadt 1568: <ul>
1.112 philen 1569: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1570: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1571: (patch included)</a>
1.112 philen 1572: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1573: </ul>
1.51 deraadt 1574:
1.106 deraadt 1575: <p>
1576: <li>
1.288 matthieu 1577: <a name="20"></a>
1.235 miod 1578:
1.294 david 1579: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1580: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1581: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1582: exist in other operating systems. (If you are running OpenBSD 2.0, we
1583: commend you for being there back in the old days!, but you're really
1584: missing out if you don't install a new version!)
1585:
1586: <p>
1587: <ul>
1.112 philen 1588: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1589: resolver (patch included)</a>
1590: <li>Many others... if people can hunt them down, please let me know
1591: and we'll put them up here.
1592: </ul>
1.51 deraadt 1593: <p>
1.106 deraadt 1594:
1.288 matthieu 1595: <a name="watching"></a>
1.294 david 1596: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1597:
1.21 deraadt 1598: Since we take a proactive stance with security, we are continually
1599: finding and fixing new security problems. Not all of these problems
1.80 espie 1600: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1601: confirmed to be exploitable; many simple bugs we fix do turn out to
1602: have security consequences we could not predict. We do not have the
1603: time resources to make these changes available in the above format.<p>
1.21 deraadt 1604:
1605: Thus there are usually minor security fixes in the current source code
1606: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1607: guarantee that these problems are of minimal impact and unproven
1.44 ian 1608: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1609: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1610:
1.45 deraadt 1611: People who are really concerned with security can do a number of
1612: things:<p>
1.21 deraadt 1613:
1614: <ul>
1615: <li>If you understand security issues, watch our
1.294 david 1616: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1617: eye out for things which appear security related. Since
1.21 deraadt 1618: exploitability is not proven for many of the fixes we make,
1619: do not expect the relevant commit message to say "SECURITY FIX!".
1620: If a problem is proven and serious, a patch will be available
1621: here very shortly after.
1.161 horacio 1622: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1623: security-announce mailing list</a> which will notify you for every
1.186 ian 1624: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1625: and instruct you on how to patch the problem.
1.21 deraadt 1626: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1627: complete system build from time to time (read /usr/src/Makefile
1628: carefully). Users can make the assumption that the current
1629: source tree always has stronger security than the previous release.
1.45 deraadt 1630: However, building your own system from source code is not trivial;
1.265 miod 1631: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1632: transition between major releases.
1.115 ericj 1633: <li>Install a binary snapshot for your
1.80 espie 1634: architecture, which are made available fairly often. For
1.29 deraadt 1635: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1636: </ul>
1637:
1.9 deraadt 1638: <p>
1.288 matthieu 1639: <a name="reporting"></a>
1.294 david 1640: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1641:
1.5 deraadt 1642: <p> If you find a new security problem, you can mail it to
1.294 david 1643: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1644: <br>
1.5 deraadt 1645: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1646: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1647:
1.107 deraadt 1648: <p>
1.288 matthieu 1649: <a name="papers"></a>
1.294 david 1650: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1651:
1652: A number of papers have been written by OpenBSD team members, about security
1653: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1654: documents are available as follows.<p>
1.107 deraadt 1655:
1656: <ul>
1.113 deraadt 1657: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1658: <a href="events.html#usenix99">Usenix 1999</a>,
1659: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1660: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1661: <a href="papers/bcrypt-paper.ps">paper</a> and
1662: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1663: <p>
1664: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1665: <a href="events.html#usenix99">Usenix 1999</a>,
1666: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1667: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1668: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1669: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1670: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1671: <a href="papers/crypt-paper.ps">paper</a> and
1672: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1673: <p>
1674: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1675: <a href="events.html#usenix99">Usenix 1999</a>,
1676: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1677: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1678: <a href="papers/strlcpy-paper.ps">paper</a> and
1679: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1680: <p>
1.118 deraadt 1681: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1682: <a href="events.html#lisa99">LISA 1999</a>,
1683: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1684: <a href="papers/authgw-paper.ps">paper</a> and
1685: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1686: <p>
1.153 jufi 1687: <li>Encrypting Virtual Memory<br>
1.294 david 1688: <a href="events.html#sec2000">Usenix Security 2000</a>,
1689: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1690: <a href="papers/swapencrypt.ps">paper</a> and
1691: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1692: <p>
1.107 deraadt 1693: </ul>
1.294 david 1694: </ul>
1.106 deraadt 1695:
1.2 deraadt 1696: <hr>
1.294 david 1697: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1698: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1699: <br>
1.372 ! millert 1700: <small>$OpenBSD: security.html,v 1.371 2009/01/30 22:25:57 sthen Exp $</small>
1.1 deraadt 1701:
1.24 deraadt 1702: </body>
1703: </html>
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