Annotation of www/security.html, Revision 1.370
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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.365 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>
1.370 ! djm 242: <li><a href="errata44.html#008_bind">January 15, 2009:
! 243: named(8) suffered from a similar logic error that may allow
! 244: bypass of DSA DNSSEC signature validation.</a>
1.368 djm 245: <li><a href="errata44.html#007_openssl">January 9, 2009:
246: OpenSSL suffered from some logic errors that allowed bypass
247: of DSA/ECDSA certificate validation.</a>
1.367 brad 248: <li><a href="errata44.html#001_ndp">November 2, 2008:
249: The Neighbor Discovery Protocol (ndp) did not correctly verify
250: neighbor solicitation requests maybe allowing a nearby attacker
251: to intercept traffic.</a>
1.365 deraadt 252: </ul>
253:
254: <li>
1.357 brad 255: <a name="43"></a>
256:
257: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
258: These are the OpenBSD 4.3 advisories -- all these problems are solved
259: in <a href=anoncvs.html>OpenBSD current</a> and the
260: <a href=stable.html>patch branch</a>.
261:
262: <p>
263: <ul>
1.370 ! djm 264: <li><a href="errata43.html#008_bind">January 15, 2009:
! 265: named(8) suffered from a similar logic error that may allow
! 266: bypass of DSA DNSSEC signature validation.</a>
1.369 djm 267: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 268: OpenSSL suffered from some logic errors that allowed bypass
269: of DSA/ECDSA certificate validation.</a>
1.363 brad 270: <li><a href="errata43.html#005_ndp">October 2, 2008:
271: The Neighbor Discovery Protocol (ndp) did not correctly verify
272: neighbor solicitation requests maybe allowing a nearby attacker
273: to intercept traffic.</a>
1.362 brad 274: <li><a href="errata43.html#004_bind">July 23, 2008:
275: A vulnerability has been found with BIND.</a>
1.361 brad 276: <li><a href="errata43.html#003_xorg">July 15, 2008:
277: Multiple vulnerabilities in X.Org.</a>
1.359 brad 278: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 279: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 280: <li><a href="errata43.html#001_openssh">March 30, 2008:
281: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 282: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 283: </ul>
284:
1.366 miod 285: <p>
286: OpenBSD 4.2 and earlier releases are not supported anymore. The following
287: paragraphs only list advisories issued while they were maintained; these
288: releases are likely to be affected by the advisories for more recent releases.
289: <br>
1.357 brad 290:
291: <li>
1.348 merdely 292: <a name="42"></a>
293:
294: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
295: These are the OpenBSD 4.2 advisories -- all these problems are solved
296: in <a href=anoncvs.html>OpenBSD current</a> and the
297: <a href=stable.html>patch branch</a>.
298:
299: <p>
300: <ul>
1.364 tobias 301: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 302: The Neighbor Discovery Protocol (ndp) did not correctly verify
303: neighbor solicitation requests maybe allowing a nearby attacker
304: to intercept traffic.</a>
1.362 brad 305: <li><a href="errata42.html#013_bind">July 23, 2008:
306: A vulnerability has been found with BIND.</a>
1.361 brad 307: <li><a href="errata42.html#012_xorg2">July 15, 2008:
308: Multiple vulnerabilities in X.Org.</a>
1.359 brad 309: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 310: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 311: <li><a href="errata42.html#010_openssh">March 30, 2008:
312: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 313: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 314: <li><a href="errata42.html#009_ppp">March 7, 2008:
315: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 316: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
317: Multiple vulnerabilities in X.Org.</a>
1.352 henning 318: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
319: A missing NULL pointer check can lead to a kernel panic.</a>
320: <li><a href="errata42.html#004_pf">Nov 27, 2007:
321: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 322: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
323: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 324: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 325: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 326: </ul>
327:
328: <li>
1.346 matthieu 329: <a name="41"></a>
330:
331: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
332: These are the OpenBSD 4.1 advisories -- all these problems are solved
333: in <a href=anoncvs.html>OpenBSD current</a> and the
334: <a href=stable.html>patch branch</a>.
335:
336: <p>
337: <ul>
1.359 brad 338: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 339: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 340: <li><a href="errata41.html#015_openssh">March 30, 2008:
341: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 342: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 343: <li><a href="errata41.html#014_ppp">March 7, 2008:
344: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 345: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
346: Multiple vulnerabilities in X.Org.</a>
347: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
348: The SSL_get_shared_ciphers() function in OpenSSL contains
349: an off-by-one overflow.</a>
1.350 deraadt 350: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 351: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 352: <li><a href="errata41.html#009_file">Jul 9, 2007:
353: Fix possible heap overflow in file(1).</a>
1.346 matthieu 354: <li><a href="errata41.html#005_route6">Apr 27, 2007:
355: IPv6 type 0 route headers can be used to mount a DoS attack
356: against hosts and networks.</a>
357: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
358: Multiple vulnerabilities in X.Org.</a>
359: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
360: Incorrect mbuf handling for ICMP6 packets.</a>
361: </ul>
362:
363: <li>
1.334 brad 364: <a name="40"></a>
365: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
366: These are the OpenBSD 4.0 advisories -- all these problems are solved
367: in <a href=anoncvs.html>OpenBSD current</a> and the
368: <a href=stable.html>patch branch</a>.
369:
370: <p>
371: <ul>
1.350 deraadt 372: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 373: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 374: <li><a href="errata40.html#015_file">Jul 9, 2007:
375: Fix possible heap overflow in file(1).</a>
1.343 deraadt 376: <li><a href="errata40.html#012_route6">Apr 23, 2007:
377: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 378: against hosts and networks.</a>
1.342 mbalmer 379: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
380: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 381: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
382: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 383: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 384: Insufficient validation in vga(4) may allow an attacker to gain
385: root privileges on some i386 systems.</a>
1.339 deraadt 386: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 387: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 388: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 389: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
390: found by Chris Evans.</a>
1.339 deraadt 391: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 392: Several problems have been found in OpenSSL.</a>
1.339 deraadt 393: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 394: httpd(8) does not sanitize the Expect header from an HTTP request
395: when it is reflected back in an error message, which might allow
396: cross-site scripting (XSS) style attacks.</a>
397: </ul>
398:
399: <li>
1.321 brad 400: <a name="39"></a>
401:
402: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
403: These are the OpenBSD 3.9 advisories -- all these problems are solved
404: in <a href=anoncvs.html>OpenBSD current</a> and the
405: <a href=stable.html>patch branch</a>.
406:
407: <p>
408: <ul>
1.343 deraadt 409: <li><a href="errata39.html#022_route6">Apr 23, 2007:
410: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 411: against hosts and networks.</a>
1.342 mbalmer 412: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
413: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 414: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
415: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 416: <li><a href="errata39.html#agp">Jan 3, 2007:
417: Insufficient validation in vga(4) may allow an attacker to gain
418: root privileges on some i386 systems.</a>
1.336 brad 419: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 420: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 421: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 422: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 423: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 424: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 425: found by Chris Evans.</a>
1.333 deraadt 426: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 427: Several problems have been found in OpenSSL.</a>
1.333 deraadt 428: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 429: httpd(8) does not sanitize the Expect header from an HTTP request
430: when it is reflected back in an error message, which might allow
431: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 432: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 433: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
434: possible for an attacker to construct an invalid signature which
435: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 436: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 437: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 438: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 439: Due to the failure to correctly validate LCP configuration option
440: lengths, it is possible for an attacker to send LCP packets via an
441: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 442: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 443: A problem in isakmpd(8) caused IPsec to run partly without replay
444: protection.</a>
1.333 deraadt 445: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 446: It is possible to cause the kernel to panic when more than the default
447: number of sempahores have been allocated.</a>
1.333 deraadt 448: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 449: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
450: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
451: option.</a>
1.333 deraadt 452: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 453: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 454: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 455: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
456: overflow.</a>
1.333 deraadt 457: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 458: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 459: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 460: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 461: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 462: A race condition has been reported to exist in the handling by sendmail
463: of asynchronous signals.</a>
464: </ul>
465:
466: <li>
1.318 deraadt 467: <a name="38"></a>
468:
469: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
470: These are the OpenBSD 3.8 advisories -- all these problems are solved
471: in <a href=anoncvs.html>OpenBSD current</a> and the
472: <a href=stable.html>patch branch</a>.
473:
474: <p>
475: <ul>
1.332 brad 476: <li><a href="errata38.html#ssh2">Oct 12, 2006:
477: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 478: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 479: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 480: found by Chris Evans.</a>
481: <li><a href="errata38.html#openssl2">Oct 7, 2006:
482: Several problems have been found in OpenSSL.</a>
483: <li><a href="errata38.html#httpd2">Oct 7, 2006:
484: httpd(8) does not sanitize the Expect header from an HTTP request
485: when it is reflected back in an error message, which might allow
486: cross-site scripting (XSS) style attacks.</a>
1.329 brad 487: <li><a href="errata38.html#openssl">Sep 8, 2006:
488: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
489: possible for an attacker to construct an invalid signature which
490: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 491: <li><a href="errata38.html#bind">Sep 8, 2006:
492: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 493: <li><a href="errata38.html#sppp">Sep 2, 2006:
494: Due to the failure to correctly validate LCP configuration option
495: lengths, it is possible for an attacker to send LCP packets via an
496: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 497: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
498: A problem in isakmpd(8) caused IPsec to run partly without replay
499: protection.</a>
500: <li><a href="errata38.html#sem">Aug 25, 2006:
501: It is possible to cause the kernel to panic when more than the default
502: number of sempahores have been allocated.</a>
503: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
504: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
505: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
506: option.</a>
507: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
508: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 509: <li><a href="errata38.html#httpd">Jul 30, 2006:
510: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
511: overflow.</a>
1.324 brad 512: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
513: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 514: <li><a href="errata38.html#xorg">May 2, 2006:
515: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 516: <li><a href="errata38.html#sendmail">Mar 25, 2006:
517: A race condition has been reported to exist in the handling by sendmail
518: of asynchronous signals.</a>
519: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 520: Josh Bressers has reported a weakness in OpenSSH caused due to the
521: insecure use of the system(3) function in scp(1) when performing copy
522: operations using filenames that are supplied by the user from the
523: command line.</a>
1.321 brad 524: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 525: Do not allow users to trick suid programs into re-opening files via
526: /dev/fd.</a>
1.321 brad 527: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 528: A buffer overflow has been found in the Perl interpreter with the
529: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 530: </ul>
531:
532: <li>
1.312 david 533: <a name="37"></a>
534:
535: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
536: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 537: in <a href="anoncvs.html">OpenBSD current</a>. The
538: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
539: you should update your machine.
1.312 david 540:
541: <p>
542: <ul>
1.322 brad 543: <li><a href="errata37.html#xorg">May 2, 2006:
544: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 545: <li><a href="errata37.html#sendmail">Mar 25, 2006:
546: A race condition has been reported to exist in the handling by sendmail
547: of asynchronous signals.</a>
1.320 brad 548: <li><a href="errata37.html#ssh">Feb 12, 2006:
549: Josh Bressers has reported a weakness in OpenSSH caused due to the
550: insecure use of the system(3) function in scp(1) when performing copy
551: operations using filenames that are supplied by the user from the
552: command line.</a>
1.319 brad 553: <li><a href="errata37.html#fd">Jan 5, 2006:
554: Do not allow users to trick suid programs into re-opening files via
555: /dev/fd.</a>
556: <li><a href="errata37.html#perl">Jan 5, 2006:
557: A buffer overflow has been found in the Perl interpreter with the
558: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 559: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 560: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 561: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 562: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 563: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 564: Fix a race condition in sudo(8) that could allow a user
1.315 millert 565: to run arbitrary commands.</a>
1.318 deraadt 566: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 567: Fix a buffer overflow, memory leaks, and NULL pointer
568: dereference in cvs(1).</a>
1.312 david 569: </ul>
570:
571: <li>
1.301 miod 572: <a name="36"></a>
573:
574: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
575: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 576: in <a href="anoncvs.html">OpenBSD current</a>. The
577: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
578: you should update your machine.
1.301 miod 579:
580: <p>
1.302 markus 581: <ul>
1.317 millert 582: <li><a href="errata36.html#libz2">Jul 21, 2005:
583: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 584: <li><a href="errata36.html#libz">Jul 6, 2005:
585: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 586: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 587: Fix a race condition in sudo(8) that could allow a user
1.315 millert 588: to run arbitrary commands.</a>
1.311 deraadt 589: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 590: Fix a buffer overflow, memory leaks, and NULL pointer
591: dereference in cvs(1).</a>
1.311 deraadt 592: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 593: Due to buffer overflows in telnet(1), a malicious
594: server or man-in-the-middle attack could allow
595: execution of arbitrary code with the privileges of
596: the user invoking telnet(1).</a>
1.311 deraadt 597: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 598: More stringent checking should be done in the copy(9)
599: functions to prevent their misuse.</a>
1.311 deraadt 600: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 601: More stringent checking should be done in the copy(9)
602: functions to prevent their misuse.</a>
1.311 deraadt 603: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 604: httpd(8)'s mod_include module fails to properly validate
605: the length of user supplied tag strings prior to copying
1.305 brad 606: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 607: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 608: On systems running isakmpd(8) it is possible for a local
609: user to cause kernel memory corruption and system panic by
1.303 markus 610: setting ipsec(4) credentials on a socket.</a>
1.302 markus 611: </ul>
1.301 miod 612:
613: <li>
1.288 matthieu 614: <a name="35"></a>
1.279 deraadt 615:
1.294 david 616: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 617: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 618: in <a href="anoncvs.html">OpenBSD current</a>. The
619: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
620: you should update your machine.
1.279 deraadt 621:
622: <p>
623: <ul>
1.310 brad 624: <li><a href="errata35.html#cvs4">Apr 28, 2005:
625: Fix a buffer overflow, memory leaks, and NULL pointer
626: dereference in cvs(1).</a>
1.309 brad 627: <li><a href="errata35.html#telnet">Mar 30, 2005:
628: Due to buffer overflows in telnet(1), a malicious
629: server or man-in-the-middle attack could allow
630: execution of arbitrary code with the privileges of
631: the user invoking telnet(1).</a>
1.308 brad 632: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 633: More stringent checking should be done in the copy(9)
634: functions to prevent their misuse.</a>
1.306 brad 635: <li><a href="errata35.html#locore">Feb 28, 2005:
636: More stringent checking should be done in the copy(9)
637: functions to prevent their misuse.</a>
1.304 brad 638: <li><a href="errata35.html#httpd3">Jan 12, 2005:
639: httpd(8)'s mod_include module fails to properly validate
640: the length of user supplied tag strings prior to copying
1.305 brad 641: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 642: <li><a href="errata35.html#pfkey">Dec 14, 2004:
643: On systems running isakmpd(8) it is possible for a local
644: user to cause kernel memory corruption and system panic by
1.303 markus 645: setting ipsec(4) credentials on a socket.</a>
1.301 miod 646: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 647: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 648: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 649: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 650: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 651: httpd(8)'s mod_rewrite module can be made to write one zero byte in
652: an arbitrary memory position outside of a char array, causing a DoS
653: or possibly buffer overflows.</a>
1.301 miod 654: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 655: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 656: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 657: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 658: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 659: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 660: Multiple remote vulnerabilities have been found in the cvs(1)
661: server which can be used by CVS clients to crash or execute
1.293 brad 662: arbitrary code on the server.</a>
1.301 miod 663: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 664: kdc(8) performs inadequate checking of request fields, leading
665: to the possibility of principal impersonation from other
666: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 667: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 668: xdm(1) ignores the requestPort resource and creates a
1.293 brad 669: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 670: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 671: A buffer overflow in the cvs(1) server has been found,
672: which can be used by CVS clients to execute arbitrary code on
1.293 brad 673: the server.</a>
1.301 miod 674: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 675: Integer overflow problems were found in procfs, allowing
1.293 brad 676: reading of arbitrary kernel memory.</a>
1.301 miod 677: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 678: Pathname validation problems have been found in cvs(1),
679: allowing clients and servers access to files outside the
1.293 brad 680: repository or local CVS tree.</a>
1.279 deraadt 681: </ul>
682:
683: <p>
684: <li>
1.288 matthieu 685: <a name="34"></a>
1.261 david 686:
1.294 david 687: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 688: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 689: in <a href="anoncvs.html">OpenBSD current</a>. The
690: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
691: you should update your machine.
1.261 david 692: <p>
693: <ul>
1.302 markus 694: <li><a href="errata34.html#pfkey">Dec 14, 2004:
695: On systems running isakmpd(8) it is possible for a local
696: user to cause kernel memory corruption and system panic by
1.303 markus 697: setting ipsec(4) credentials on a socket.</a>
1.298 brad 698: <li><a href="errata34.html#xpm">Sep 16, 2004:
699: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 700: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
701: httpd(8)'s mod_rewrite module can be made to write one zero byte in
702: an arbitrary memory position outside of a char array, causing a DoS
703: or possibly buffer overflows.</a>
1.294 david 704: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 705: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 706: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 707: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 708: an attacker can delete IPsec tunnels at will.</a>
1.294 david 709: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 710: Multiple remote vulnerabilities have been found in the cvs(1)
711: server which can be used by CVS clients to crash or execute
1.293 brad 712: arbitrary code on the server.</a>
1.294 david 713: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 714: kdc(8) performs inadequate checking of request fields, leading
715: to the possibility of principal impersonation from other
716: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 717: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 718: A buffer overflow in the cvs(1) server has been found,
719: which can be used by CVS clients to execute arbitrary code on
720: the server.</a>
1.294 david 721: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 722: Integer overflow problems were found in procfs, allowing
723: reading of arbitrary kernel memory.</a>
1.294 david 724: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 725: Pathname validation problems have been found in cvs(1),
726: allowing clients and servers access to files outside the
727: repository or local CVS tree.</a>
1.294 david 728: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 729: A missing check for a NULL-pointer dereference may allow a
1.281 otto 730: remote attacker to crash applications using OpenSSL.</a>
1.294 david 731: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 732: Defects in the payload validation and processing functions of
733: isakmpd have been discovered. An attacker could send malformed
734: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 735: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 736: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
737: access module, using IP addresses without a netmask on big endian
738: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 739: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 740: An IPv6 MTU handling problem exists that could be used by an
741: attacker to cause a denial of service attack.</a>
1.294 david 742: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 743: A reference counting bug in shmat(2) could be used to write to
744: kernel memory under certain circumstances.</a>
1.294 david 745: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 746: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 747: by Thomas Walpuski.</a>
1.294 david 748: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 749: It may be possible for a local user to overrun the stack in
750: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 751: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 752: The use of certain ASN.1 encodings or malformed public keys may
753: allow an attacker to mount a denial of service attack against
754: applications linked with ssl(3).</a>
1.261 david 755: </ul>
756:
757: <li>
1.288 matthieu 758: <a name="33"></a>
1.246 deraadt 759:
1.294 david 760: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 761: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 762: in <a href="anoncvs.html">OpenBSD current</a>. The
763: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 764: you should update your machine.
1.246 deraadt 765: <p>
766: <ul>
1.294 david 767: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 768: Pathname validation problems have been found in cvs(1),
769: allowing clients and servers access to files outside the
770: repository or local CVS tree.</a>
1.294 david 771: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 772: A missing check for a NULL-pointer dereference may allow a
1.281 otto 773: remote attacker to crash applications using OpenSSL.</a>
1.294 david 774: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 775: Defects in the payload validation and processing functions of
776: isakmpd have been discovered. An attacker could send malformed
777: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 778: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 779: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
780: access module, using IP addresses without a netmask on big endian
781: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 782: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 783: An IPv6 MTU handling problem exists that could be used by an
784: attacker to cause a denial of service attack.</a>
1.294 david 785: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 786: A reference counting bug in shmat(2) could be used to write to
787: kernel memory under certain circumstances.</a>
1.294 david 788: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 789: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 790: by Thomas Walpuski.</a>
1.294 david 791: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 792: It may be possible for a local user to execute arbitrary code
793: resulting in escalation of privileges due to a stack overrun
794: in compat_ibcs2(8).</a>
1.294 david 795: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 796: The use of certain ASN.1 encodings or malformed public keys may
797: allow an attacker to mount a denial of service attack against
798: applications linked with ssl(3).</a>
1.294 david 799: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 800: Access of freed memory in pf(4) could be used to
1.260 margarid 801: remotely panic a machine using scrub rules.</a>
1.294 david 802: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 803: A buffer overflow in the address parsing in
804: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 805: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 806: OpenSSH versions prior to 3.7 contains a buffer management error
807: that is potentially exploitable.</a>
1.294 david 808: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 809: Root may be able to reduce the security level by taking advantage of
810: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 811: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 812: An improper bounds check in the kernel may allow a local user
813: to panic the kernel.</a>
1.294 david 814: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 815: An off-by-one error exists in the C library function realpath(3)
816: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 817: </ul>
818:
1.265 miod 819:
1.247 david 820: <p>
1.246 deraadt 821: <li>
1.288 matthieu 822: <a name="32"></a>
1.224 deraadt 823:
1.294 david 824: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 825: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 826: in <a href="anoncvs.html">OpenBSD current</a>. The
827: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 828: you should update your machine.
1.224 deraadt 829: <p>
830: <ul>
1.294 david 831: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 832: The use of certain ASN.1 encodings or malformed public keys may
833: allow an attacker to mount a denial of service attack against
834: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 835: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 836: Access of freed memory in pf(4) could be used to
1.260 margarid 837: remotely panic a machine using scrub rules.</a>
1.294 david 838: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 839: A buffer overflow in the address parsing in
840: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 841: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 842: OpenSSH versions prior to 3.7 contains a buffer management error
843: that is potentially exploitable.</a>
1.294 david 844: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 845: Fix for a potential security issue in
846: sendmail(8) with respect to DNS maps.</a>
1.294 david 847: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 848: An off-by-one error exists in the C library function realpath(3)
849: may allow an attacker to gain escalated privileges.</a>
1.294 david 850: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 851: A buffer overflow in the address parsing in
852: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 853: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 854: A cryptographic weaknesses in the Kerberos v4 protocol can be
855: exploited on Kerberos v5 as well.</a>
1.294 david 856: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 857: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 858: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 859: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 860: Various SSL and TLS operations in OpenSSL are vulnerable to
861: timing attacks.</a>
1.294 david 862: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 863: A buffer overflow in lprm(1) may allow an attacker to elevate
864: privileges to user daemon.</a>.
1.294 david 865: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 866: A buffer overflow in the envelope comments processing in
867: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 868: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 869: httpd(8) leaks file inode numbers via ETag header as well as
870: child PIDs in multipart MIME boundary generation. This could
871: lead, for example, to NFS exploitation because it uses inode
872: numbers as part of the file handle.</a>
1.294 david 873: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 874: In ssl(8) an information leak can occur via timing by performing
875: a MAC computation even if incorrect block cipher padding has
876: been found, this is a countermeasure. Also, check for negative
877: sizes, in allocation routines.</a>
1.294 david 878: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 879: A double free exists in cvs(1) that could lead to privilege
880: escalation for cvs configurations where the cvs command is
1.233 margarid 881: run as a privileged user.</a>
1.294 david 882: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 883: A buffer overflow exists in named(8) that could lead to a
884: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 885: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 886: A logic error in the pool kernel memory allocator could cause
887: memory corruption in low-memory situations, causing the system
888: to crash.</a>
1.294 david 889: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 890: An attacker can bypass smrsh(8)'s restrictions and execute
891: arbitrary commands with the privileges of his own account.</a>
1.294 david 892: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 893: Network bridges running pf with scrubbing enabled could cause
894: mbuf corruption, causing the system to crash.</a>
1.294 david 895: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 896: A buffer overflow can occur in the kadmind(8) daemon, leading
897: to possible remote crash or exploit.</a>
1.224 deraadt 898: </ul>
899:
1.227 miod 900: <p>
901: <li>
1.288 matthieu 902: <a name="31"></a>
1.203 deraadt 903:
1.294 david 904: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 905: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 906: in <a href="anoncvs.html">OpenBSD current</a>. The
907: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 908: you should update your machine.
1.203 deraadt 909:
910: <p>
911: <ul>
1.294 david 912: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 913: A buffer overflow in the address parsing in
914: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 915: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 916: A cryptographic weaknesses in the Kerberos v4 protocol can be
917: exploited on Kerberos v5 as well.</a>
1.294 david 918: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 919: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 920: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 921: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 922: Various SSL and TLS operations in OpenSSL are vulnerable to
923: timing attacks.</a>
1.294 david 924: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 925: A buffer overflow in lprm(1) may allow an attacker to gain
926: root privileges.</a>
1.294 david 927: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 928: A buffer overflow in the envelope comments processing in
929: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 930: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 931: In ssl(8) an information leak can occur via timing by performing
932: a MAC computation even if incorrect block cipher padding has
933: been found, this is a countermeasure. Also, check for negative
934: sizes, in allocation routines.</a>
1.294 david 935: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 936: A double free exists in cvs(1) that could lead to privilege
937: escalation for cvs configurations where the cvs command is
1.294 david 938: run as a privileged user</a>.
939: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 940: A buffer overflow exists in named(8) that could lead to a
941: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 942: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 943: Incorrect argument checking in the getitimer(2) system call
944: may allow an attacker to crash the system.</a>
1.294 david 945: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 946: An attacker can bypass smrsh(8)'s restrictions and execute
947: arbitrary commands with the privileges of his own account.</a>
1.294 david 948: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 949: A buffer overflow can occur in the kadmind(8) daemon, leading
950: to possible remote crash or exploit.</a>
1.294 david 951: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 952: Incorrect argument checking in the setitimer(2) system call
953: may allow an attacker to write to kernel memory.</a>
1.294 david 954: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 955: An insufficient boundary check in the select system call
1.220 miod 956: allows an attacker to overwrite kernel memory and execute arbitrary code
957: in kernel context.</a>
1.294 david 958: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 959: Several remote buffer overflows can occur in the SSL2 server and SSL3
960: client of the ssl(8) library, as in the ASN.1 parser code in the
961: crypto(3) library, all of them being potentially remotely
962: exploitable.</a>
1.294 david 963: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 964: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
965: possible remote crash.</a>
1.294 david 966: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 967: A race condition exists in the pppd(8) daemon which may cause it to
968: alter the file permissions of an arbitrary file.</a>
1.294 david 969: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 970: Receiving IKE payloads out of sequence can cause isakmpd(8) to
971: crash.</a>
1.294 david 972: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 973: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 974: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 975: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 976: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 977: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 978: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 979: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 980: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 981: input validation error that can result in an integer overflow and
982: privilege escalation.</a>
1.294 david 983: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 984: A buffer overflow can occur during the interpretation of chunked
985: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 986: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 987: Under certain conditions, on systems using YP with netgroups
988: in the password database, it is possible that sshd(8) does
989: ACL checks for the requested user name but uses the password
990: database entry of a different user for authentication. This
991: means that denied users might authenticate successfully
992: while permitted users could be locked out.</a>
1.294 david 993: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 994: A race condition exists that could defeat the kernel's
995: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 996: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 997: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 998: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 999: A local user can gain super-user privileges due to a buffer
1000: overflow in sshd(8) if AFS has been configured on the system
1001: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1002: in the sshd_config file.</a>
1.203 deraadt 1003: </ul>
1004:
1.235 miod 1005: <p>
1.203 deraadt 1006: <li>
1.288 matthieu 1007: <a name="30"></a>
1.187 deraadt 1008:
1.294 david 1009: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1010: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1011: in <a href="anoncvs.html">OpenBSD current</a>. The
1012: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1013: you should update your machine.
1.187 deraadt 1014:
1015: <p>
1016: <ul>
1.294 david 1017: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1018: A buffer overflow exists in named(8) that could lead to a
1019: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1020: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1021: Incorrect argument checking in the getitimer(2) system call
1022: may allow an attacker to crash the system.</a>
1.294 david 1023: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1024: An attacker can bypass smrsh(8)'s restrictions and execute
1025: arbitrary commands with the privileges of his own account.</a>
1.294 david 1026: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1027: A buffer overflow can occur in the kadmind(8) daemon, leading
1028: to possible remote crash or exploit.</a>
1.294 david 1029: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1030: Incorrect argument checking in the setitimer(2) system call
1031: may allow an attacker to write to kernel memory.</a>
1.294 david 1032: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1033: An insufficient boundary check in the select and poll system calls
1034: allows an attacker to overwrite kernel memory and execute arbitrary code
1035: in kernel context.</a>
1.294 david 1036: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1037: Several remote buffer overflows can occur in the SSL2 server and SSL3
1038: client of the ssl(8) library, as in the ASN.1 parser code in the
1039: crypto(3) library, all of them being potentially remotely
1040: exploitable.</a>
1.294 david 1041: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1042: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1043: possible remote crash.</a>
1.294 david 1044: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1045: A race condition exists in the pppd(8) daemon which may cause it to
1046: alter the file permissions of an arbitrary file.</a>
1.294 david 1047: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1048: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1049: crash.</a>
1.294 david 1050: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1051: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1052: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1053: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1054: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1055: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1056: input validation error that can result in an integer overflow and
1057: privilege escalation.</a>
1.294 david 1058: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1059: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1060: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1061: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1062: A buffer overflow can occur during the interpretation of chunked
1063: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1064: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1065: A race condition exists that could defeat the kernel's
1066: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1067: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1068: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1069: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1070: A local user can gain super-user privileges due to a buffer
1071: overflow in sshd(8) if AFS has been configured on the system
1072: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1073: in the sshd_config file.</a>
1.294 david 1074: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1075: The mail(1) was interpreting tilde escapes even when invoked
1076: in non-interactive mode. As mail(1) is called as root from cron,
1077: this can lead to a local root compromise.</a>
1.294 david 1078: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1079: Under certain conditions, on systems using YP with netgroups in
1080: the password database, it is possible for the rexecd(8) and rshd(8)
1081: daemons to execute a shell from a password database entry for a
1082: different user. Similarly, atrun(8) may change to the wrong
1083: home directory when running jobs.</a>
1.294 david 1084: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1085: A potential double free() exists in the zlib library;
1086: this is not exploitable on OpenBSD.
1087: The kernel also contains a copy of zlib; it is not
1088: currently known if the kernel zlib is exploitable.</a>
1.294 david 1089: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1090: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1091: may allow a local user to gain super-user privileges.</a>
1.294 david 1092: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1093: A race condition between the ptrace(2) and execve(2) system calls
1094: allows an attacker to modify the memory contents of suid/sgid
1095: processes which could lead to compromise of the super-user account.</a>
1.294 david 1096: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1097: There is a security hole in sudo(8) that can be exploited
1098: when the Postfix sendmail replacement is installed that may
1099: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1100: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1101: An attacker can trick a machine running the lpd daemon into
1102: creating new files in the root directory from a machine with
1103: remote line printer access.</a>
1.294 david 1104: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1105: The vi.recover script can be abused in such a way as
1106: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1107: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1108: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1109: resulting in a crash.</a>
1.294 david 1110: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1111: A security hole that may allow an attacker to partially authenticate
1112: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1113: </ul>
1114:
1115: <p>
1116: <li>
1.288 matthieu 1117: <a name="29"></a>
1.173 deraadt 1118:
1.294 david 1119: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1120: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1121: in <a href="anoncvs.html">OpenBSD current</a>. The
1122: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1123: you should update your machine.
1124:
1.173 deraadt 1125:
1126: <p>
1127: <ul>
1.294 david 1128: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1129: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1130: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1131: A race condition exists that could defeat the kernel's
1132: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1133: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1134: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1135: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1136: A local user can gain super-user privileges due to a buffer
1137: overflow in sshd(8) if AFS has been configured on the system
1138: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1139: in the sshd_config file.</a>
1.294 david 1140: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1141: The mail(1) was interpreting tilde escapes even when invoked
1142: in non-interactive mode. As mail(1) is called as root from cron,
1143: this can lead to a local root compromise.</a>
1.294 david 1144: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1145: A potential double free() exists in the zlib library;
1146: this is not exploitable on OpenBSD.
1147: The kernel also contains a copy of zlib; it is not
1148: currently known if the kernel zlib is exploitable.</a>
1.294 david 1149: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1150: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1151: may allow a local user to gain super-user privileges.</a>
1.294 david 1152: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1153: A race condition between the ptrace(2) and execve(2) system calls
1154: allows an attacker to modify the memory contents of suid/sgid
1155: processes which could lead to compromise of the super-user account.</a>
1.294 david 1156: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1157: There is a security hole in sudo(8) that can be exploited
1158: when the Postfix sendmail replacement is installed that may
1159: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1160: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1161: An attacker can trick a machine running the lpd daemon into
1162: creating new files in the root directory from a machine with
1163: remote line printer access.</a>
1.294 david 1164: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1165: The vi.recover script can be abused in such a way as
1166: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1167: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1168: A security hole exists in uuxqt(8) that may allow an
1169: attacker to gain root privileges.</a>
1.294 david 1170: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1171: A security hole exists in lpd(8) that may allow an
1172: attacker to gain root privileges if lpd is running.</a>
1.294 david 1173: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1174: A security hole exists in sendmail(8) that may allow an
1175: attacker on the local host to gain root privileges.</a>
1.294 david 1176: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1177: A kernel buffer overflow in the NFS code can be used to execute
1178: arbitrary code by users with mount privileges (only root by
1.181 millert 1179: default).</a>
1.294 david 1180: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1181: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1182: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1183: sshd(8) allows users to delete arbitrary files named "cookies"
1184: if X11 forwarding is enabled. X11 forwarding is disabled
1185: by default.</a>
1.294 david 1186: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1187: Programs using the fts routines can be tricked into changing
1188: into the wrong directory.</a>
1.294 david 1189: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1190: Sendmail signal handlers contain unsafe code,
1191: leading to numerous race conditions.</a>
1.173 deraadt 1192: </ul>
1193:
1194: <p>
1195: <li>
1.288 matthieu 1196: <a name="28"></a>
1.152 deraadt 1197:
1.294 david 1198: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1199: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1200: in <a href="anoncvs.html">OpenBSD current</a>. The
1201: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1202: you should update your machine.
1203:
1.152 deraadt 1204:
1205: <p>
1206: <ul>
1.294 david 1207: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1208: A security hole exists in uuxqt(8) that may allow an
1209: attacker to gain root privileges.</a>
1.294 david 1210: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1211: A security hole exists in lpd(8) that may allow an
1212: attacker to gain root privileges if lpd is running.</a>
1.294 david 1213: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1214: A security hole exists in sendmail(8) that may allow an
1215: attacker on the local host to gain root privileges.</a>
1.294 david 1216: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1217: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1218: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1219: Programs using the fts routines can be tricked into changing
1220: into the wrong directory.</a>
1.294 david 1221: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1222: Sendmail signal handlers contain unsafe code,
1223: leading to numerous race conditions.</a>
1.294 david 1224: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1225: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1226: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1227: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1228: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1229: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1230: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1231: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1232: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1233: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1234: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1235: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1236: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1237: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1238: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1239: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1240: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1241: rnd(4) did not use all of its input when written to.</a>
1.294 david 1242: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1243: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1244: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1245: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1246: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1247: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1248: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1249: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1250: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1251: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1252: </ul>
1253:
1254: <p>
1255: <li>
1.288 matthieu 1256: <a name="27"></a>
1.124 deraadt 1257:
1.294 david 1258: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1259: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1260: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1261: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1262:
1263: <p>
1264: <ul>
1.294 david 1265: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1266: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1267: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1268: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1269: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1270: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1271: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1272: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1273: (patch included)</a>
1.294 david 1274: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1275: X11 libraries have 2 potential overflows in xtrans code.
1276: (patch included)</a>
1.294 david 1277: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1278: Apache mod_rewrite and mod_vhost_alias modules could expose files
1279: on the server in certain configurations if used.
1280: (patch included)</a>
1.294 david 1281: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1282: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1283: TERMPATH and TERMCAP environment variables as it should.
1284: (patch included)</a>
1.294 david 1285: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1286: There are printf-style format string bugs in several privileged
1287: programs. (patch included)</a>
1.294 david 1288: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1289: libcurses honored terminal descriptions in the $HOME/.terminfo
1290: directory as well as in the TERMCAP environment variable for
1291: setuid and setgid applications.
1.146 deraadt 1292: (patch included)</a>
1.294 david 1293: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1294: A format string vulnerability exists in talkd(8).
1295: (patch included)</a>
1.294 david 1296: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1297: A format string vulnerability exists in the pw_error() function of the
1298: libutil library, yielding localhost root through chpass(1).
1299: (patch included)</a>
1.294 david 1300: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1301: Bad ESP/AH packets could cause a crash under certain conditions.
1302: (patch included)</a>
1.294 david 1303: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1304: A format string vulnerability (localhost root) exists in xlock(1).
1305: (patch included)</a>
1.294 david 1306: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1307: Various bugs found in X11 libraries have various side effects, almost
1308: completely denial of service in OpenBSD.
1309: (patch included)</a>
1.294 david 1310: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1311: Just like pretty much all the other unix ftp daemons
1312: on the planet, ftpd had a remote root hole in it.
1313: Luckily, ftpd was not enabled by default.
1.137 deraadt 1314: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1315: (patch included)</a>
1.294 david 1316: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1317: Mopd, very rarely used, contained some buffer overflows.
1318: (patch included)</a>
1.294 david 1319: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1320: libedit would check for a <b>.editrc</b> file in the current
1321: directory. Not known to be a real security issue, but a patch
1322: is available anyways.
1323: (patch included)</a>
1.294 david 1324: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1325: A serious bug in dhclient(8) could allow strings from a
1326: malicious dhcp server to be executed in the shell as root.
1327: (patch included)</a>
1.294 david 1328: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1329: A serious bug in isakmpd(8) policy handling wherein
1330: policy verification could be completely bypassed in isakmpd.
1331: (patch included)</a>
1.294 david 1332: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1333: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1334: should not be used, and results in security problems on
1335: other operating systems.</a>
1.294 david 1336: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1337: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1338: (patch included)</a>
1.294 david 1339: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1340: Improper use of ipf <i>keep-state</i> rules can result
1341: in firewall rules being bypassed. (patch included)</a>
1342:
1.124 deraadt 1343: </ul>
1344:
1345: <p>
1346: <li>
1.288 matthieu 1347: <a name="26"></a>
1.119 deraadt 1348:
1.294 david 1349: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1350: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1351: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1352: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1353:
1354: <p>
1355: <ul>
1.294 david 1356: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1357: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1358: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1359: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1360: Improper use of ipf <i>keep-state</i> rules can result
1361: in firewall rules being bypassed. (patch included)</a>
1.294 david 1362: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1363: xlockmore has a bug which a localhost attacker can use to gain
1364: access to the encrypted root password hash (which is normally
1.245 miod 1365: encoded using blowfish</a> (see
1.294 david 1366: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1367: crypt(3)</a>)
1.245 miod 1368: (patch included).
1.294 david 1369: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1370: Systems running with procfs enabled and mounted are
1371: vulnerable to a very tricky exploit. procfs is not
1372: mounted by default.
1373: (patch included).</a>
1.294 david 1374: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1375: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1376: thus exposing the system to a race where the aliases file
1377: did not exist.
1.119 deraadt 1378: (patch included).</a>
1.294 david 1379: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1380: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1381: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1382: A buffer overflow in the RSAREF code included in the
1383: USA version of libssl, is possibly exploitable in
1384: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1385: (patch included).<br></a>
1386: <strong>Update:</strong> Turns out that this was not exploitable
1387: in any of the software included in OpenBSD 2.6.
1.294 david 1388: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1389: Any user could change interface media configurations, resulting in
1390: a localhost denial of service attack.
1.121 deraadt 1391: (patch included).</a>
1.119 deraadt 1392: </ul>
1393:
1394: <p>
1395: <li>
1.288 matthieu 1396: <a name="25"></a>
1.106 deraadt 1397:
1.294 david 1398: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1399: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1400: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1401: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1402:
1.96 deraadt 1403: <p>
1.104 deraadt 1404: <ul>
1.294 david 1405: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1406: In cron(8), make sure argv[] is NULL terminated in the
1407: fake popen() and run sendmail as the user, not as root.
1408: (patch included).</a>
1.294 david 1409: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1410: filesystems had an overrun in their handling of uio_offset
1411: in their readdir() routines. (These filesystems are not
1412: enabled by default). (patch included).</a>
1.294 david 1413: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1414: when we execve() a new process. (patch included).</a>
1.294 david 1415: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1416: been handled by IPsec may be transmitted as cleartext.
1417: PF_KEY SA expirations may leak kernel resources.
1418: (patch included).</a>
1.294 david 1419: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1420: motd re-writing and change the find(1) to use -execdir
1421: (patch included).</a>
1.294 david 1422: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1423: users to chflags(2) or fchflags(2) on character or block devices
1424: which they may currently be the owner of (patch included).</a>
1.294 david 1425: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1426: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1427: </ul>
1428:
1.106 deraadt 1429: <p>
1430: <li>
1.288 matthieu 1431: <a name="24"></a>
1.235 miod 1432:
1.294 david 1433: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1434: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1435: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1436: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1437:
1.96 deraadt 1438: <p>
1.75 deraadt 1439: <ul>
1.294 david 1440: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1441: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1442: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1443: another kernel crash case caused by the <strong>crashme</strong>
1444: program (patch included).</a>
1.294 david 1445: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1446: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1447: (patch included).</a>
1.294 david 1448: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1449: existed in ping(8). (patch included).</a>
1.294 david 1450: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1451: the ipq, which could permit an attacker to cause a crash.
1452: (patch included).</a>
1.294 david 1453: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1454: kernel between accept(2) and select(2) could permit an attacker
1455: to hang sockets from remote.
1456: (patch included).</a>
1.294 david 1457: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1458: bog the machine excessively and cause problems.
1459: (patch included).</a>
1.294 david 1460: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1461: DDB interacted to possibly cause a crash.
1462: (patch included).</a>
1.294 david 1463: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1464: (patch included).</a>
1.294 david 1465: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1466: problem in bootpd(8). (patch included).</a>
1.294 david 1467: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1468: exploitable problem relating to environment variables in termcap
1469: and curses. (patch included).</a>
1.294 david 1470: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1471: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1472: </ul>
1473:
1.106 deraadt 1474: <p>
1475: <li>
1.288 matthieu 1476: <a name="23"></a>
1.235 miod 1477:
1.294 david 1478: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1479: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1480: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1481: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1482:
1.96 deraadt 1483: <p>
1.53 matthieu 1484: <ul>
1.294 david 1485: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1486: problem in bootpd(8). (patch included).</a>
1.294 david 1487: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1488: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1489: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1490: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1491: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1492: chpass(1) has a file descriptor leak which allows an
1493: attacker to modify /etc/master.passwd.</a>
1.294 david 1494: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1495: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1496: should not be executed with fd slots 0, 1, or 2 free.
1497: (patch included).</a>
1.294 david 1498: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1499: libraries (patches included).</a>
1.294 david 1500: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1501: processes too permissive (4th revision patch included).</a>
1.294 david 1502: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1503: of immutable and append-only file flags. (patch included).</a>
1.294 david 1504: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1505: if IPSEC is enabled (patch included).</a>
1.294 david 1506: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1507: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1508: </ul>
1.9 deraadt 1509:
1.106 deraadt 1510: <p>
1511: <li>
1.288 matthieu 1512: <a name="22"></a>
1.235 miod 1513:
1.294 david 1514: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1515: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1516: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1517: still exist in other operating systems. (The supplied patches are for
1518: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1519:
1.96 deraadt 1520: <p>
1.9 deraadt 1521: <ul>
1.294 david 1522: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1523: packets if IPSEC is enabled (patch included).</a>
1.294 david 1524: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1525: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1526: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1527: (patch included).</a>
1.294 david 1528: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1529: (patch included).</a>
1.294 david 1530: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1531: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1532: (patch included).</a>
1.294 david 1533: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1534: export (patch included).</a>
1.112 philen 1535: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1536: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1537: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1538: Acceptance.</a>
1.294 david 1539: A patch is available <a href="errata22.html#sourceroute">here</a>.
1540: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1541: flaw (patch included).</a>
1.294 david 1542: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1543: </ul>
1544:
1.106 deraadt 1545: <p>
1546: <li>
1.288 matthieu 1547: <a name="21"></a>
1.235 miod 1548:
1.294 david 1549: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1550: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1551: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1552: exist in other operating systems. (If you are running OpenBSD 2.1, we
1553: would strongly recommend an upgrade to the newest release, as this
1554: patch list only attempts at fixing the most important security
1555: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1556: security problems. Many of those problems were solved in ways which
1557: make it hard for us to provide patches).
1558:
1.96 deraadt 1559: <p>
1.52 deraadt 1560: <ul>
1.112 philen 1561: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1562: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1563: (patch included)</a>
1.112 philen 1564: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1565: </ul>
1.51 deraadt 1566:
1.106 deraadt 1567: <p>
1568: <li>
1.288 matthieu 1569: <a name="20"></a>
1.235 miod 1570:
1.294 david 1571: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1572: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1573: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1574: exist in other operating systems. (If you are running OpenBSD 2.0, we
1575: commend you for being there back in the old days!, but you're really
1576: missing out if you don't install a new version!)
1577:
1578: <p>
1579: <ul>
1.112 philen 1580: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1581: resolver (patch included)</a>
1582: <li>Many others... if people can hunt them down, please let me know
1583: and we'll put them up here.
1584: </ul>
1.51 deraadt 1585: <p>
1.106 deraadt 1586:
1.288 matthieu 1587: <a name="watching"></a>
1.294 david 1588: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1589:
1.21 deraadt 1590: Since we take a proactive stance with security, we are continually
1591: finding and fixing new security problems. Not all of these problems
1.80 espie 1592: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1593: confirmed to be exploitable; many simple bugs we fix do turn out to
1594: have security consequences we could not predict. We do not have the
1595: time resources to make these changes available in the above format.<p>
1.21 deraadt 1596:
1597: Thus there are usually minor security fixes in the current source code
1598: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1599: guarantee that these problems are of minimal impact and unproven
1.44 ian 1600: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1601: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1602:
1.45 deraadt 1603: People who are really concerned with security can do a number of
1604: things:<p>
1.21 deraadt 1605:
1606: <ul>
1607: <li>If you understand security issues, watch our
1.294 david 1608: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1609: eye out for things which appear security related. Since
1.21 deraadt 1610: exploitability is not proven for many of the fixes we make,
1611: do not expect the relevant commit message to say "SECURITY FIX!".
1612: If a problem is proven and serious, a patch will be available
1613: here very shortly after.
1.161 horacio 1614: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1615: security-announce mailing list</a> which will notify you for every
1.186 ian 1616: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1617: and instruct you on how to patch the problem.
1.21 deraadt 1618: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1619: complete system build from time to time (read /usr/src/Makefile
1620: carefully). Users can make the assumption that the current
1621: source tree always has stronger security than the previous release.
1.45 deraadt 1622: However, building your own system from source code is not trivial;
1.265 miod 1623: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1624: transition between major releases.
1.115 ericj 1625: <li>Install a binary snapshot for your
1.80 espie 1626: architecture, which are made available fairly often. For
1.29 deraadt 1627: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1628: </ul>
1629:
1.9 deraadt 1630: <p>
1.288 matthieu 1631: <a name="reporting"></a>
1.294 david 1632: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1633:
1.5 deraadt 1634: <p> If you find a new security problem, you can mail it to
1.294 david 1635: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1636: <br>
1.5 deraadt 1637: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1638: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1639:
1.107 deraadt 1640: <p>
1.288 matthieu 1641: <a name="papers"></a>
1.294 david 1642: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1643:
1644: A number of papers have been written by OpenBSD team members, about security
1645: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1646: documents are available as follows.<p>
1.107 deraadt 1647:
1648: <ul>
1.113 deraadt 1649: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1650: <a href="events.html#usenix99">Usenix 1999</a>,
1651: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1652: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1653: <a href="papers/bcrypt-paper.ps">paper</a> and
1654: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1655: <p>
1656: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1657: <a href="events.html#usenix99">Usenix 1999</a>,
1658: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1659: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1660: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1661: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1662: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1663: <a href="papers/crypt-paper.ps">paper</a> and
1664: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1665: <p>
1666: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1667: <a href="events.html#usenix99">Usenix 1999</a>,
1668: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1669: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1670: <a href="papers/strlcpy-paper.ps">paper</a> and
1671: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1672: <p>
1.118 deraadt 1673: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1674: <a href="events.html#lisa99">LISA 1999</a>,
1675: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1676: <a href="papers/authgw-paper.ps">paper</a> and
1677: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1678: <p>
1.153 jufi 1679: <li>Encrypting Virtual Memory<br>
1.294 david 1680: <a href="events.html#sec2000">Usenix Security 2000</a>,
1681: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1682: <a href="papers/swapencrypt.ps">paper</a> and
1683: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1684: <p>
1.107 deraadt 1685: </ul>
1.294 david 1686: </ul>
1.106 deraadt 1687:
1.2 deraadt 1688: <hr>
1.294 david 1689: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1690: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1691: <br>
1.370 ! djm 1692: <small>$OpenBSD: security.html,v 1.369 2009/01/10 03:09:40 djm Exp $</small>
1.1 deraadt 1693:
1.24 deraadt 1694: </body>
1695: </html>
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