Annotation of www/security.html, Revision 1.347
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.280 david 57: <a href="#34">3.4</a>,
1.301 miod 58: <a href="#35">3.5</a>,
1.312 david 59: <a href="#36">3.6</a>,
1.318 deraadt 60: <a href="#37">3.7</a>,
1.321 brad 61: <a href="#38">3.8</a>,
1.334 brad 62: <a href="#39">3.9</a>,
63: <a href="#40">4.0</a>.
1.346 matthieu 64: <a href="#41">4.1</a>.
1.114 philen 65: </td>
66: </tr>
67: </table>
1.56 deraadt 68: <hr>
69:
1.294 david 70: <a name="goals"></a>
1.278 deraadt 71: <ul>
1.294 david 72: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 73:
1.14 deraadt 74: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 75: ONE in the industry for security (if we are not already there). Our
76: open software development model permits us to take a more
77: uncompromising view towards increased security than Sun, SGI, IBM, HP,
78: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 79: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 80: cryptography</a>, we are able to take cryptographic approaches towards
81: fixing security problems.<p>
1.18 deraadt 82:
1.288 matthieu 83: <a name="disclosure"></a>
1.294 david 84: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 85:
1.45 deraadt 86: Like many readers of the
1.196 jufi 87: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 88: BUGTRAQ mailing list</a>,
1.106 deraadt 89: we believe in full disclosure of security problems. In the
90: operating system arena, we were probably the first to embrace
91: the concept. Many vendors, even of free software, still try
92: to hide issues from their users.<p>
93:
94: Security information moves very fast in cracker circles. On the other
95: hand, our experience is that coding and releasing of proper security
96: fixes typically requires about an hour of work -- very fast fix
97: turnaround is possible. Thus we think that full disclosure helps the
98: people who really care about security.<p>
99:
1.288 matthieu 100: <a name="process"></a>
1.294 david 101: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 102:
1.12 deraadt 103: Our security auditing team typically has between six and twelve
1.45 deraadt 104: members who continue to search for and fix new security holes. We
105: have been auditing since the summer of 1996. The process we follow to
106: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 107: every critical software component. We are not so much looking for
108: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 109: years later someone discovers the problem used to be a security
1.106 deraadt 110: issue, and we fixed it because it was just a bug, well, all the
111: better. Flaws have been found in just about every area of the system.
112: Entire new classes of security problems have been found during our
113: audit, and often source code which had been audited earlier needs
114: re-auditing with these new flaws in mind. Code often gets audited
115: multiple times, and by multiple people with different auditing
116: skills.<p>
1.12 deraadt 117:
1.94 deraadt 118: Some members of our security auditing team worked for Secure Networks,
119: the company that made the industry's premier network security scanning
120: software package Ballista (Secure Networks got purchased by Network
121: Associates, Ballista got renamed to Cybercop Scanner, and well...)
122: That company did a lot of security research, and thus fit in well
1.106 deraadt 123: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
124: colours since day 1.<p>
1.31 deraadt 125:
1.34 deraadt 126: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 127: In most cases we have found that the determination of exploitability
128: is not an issue. During our ongoing auditing process we find many
129: bugs, and endeavor to fix them even though exploitability is not
130: proven. We fix the bug, and we move on to find other bugs to fix. We
131: have fixed many simple and obvious careless programming errors in code
132: and only months later discovered that the problems were in fact
133: exploitable. (Or, more likely someone on
1.197 jufi 134: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 135: would report that other operating systems were vulnerable to a `newly
136: discovered problem', and then it would be discovered that OpenBSD had
137: been fixed in a previous release). In other cases we have been saved
138: from full exploitability of complex step-by-step attacks because we
139: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 140: managed such a success is the lpd advisory that Secure Networks put out.
141: <p>
1.29 deraadt 142:
1.288 matthieu 143: <a name="newtech"></a>
1.294 david 144: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 145:
146: As we audit source code, we often invent new ways of solving problems.
147: Sometimes these ideas have been used before in some random application
148: written somewhere, but perhaps not taken to the degree that we do.
149: <p>
150:
151: <ul>
152: <li>strlcpy() and strlcat()
153: <li>Memory protection purify
154: <ul>
155: <li>W^X
156: <li>.rodata segment
157: <li>Guard pages
158: <li>Randomized malloc()
159: <li>Randomized mmap()
160: <li>atexit() and stdio protection
161: </ul>
1.295 otto 162: <li>Privilege separation
1.278 deraadt 163: <li>Privilege revocation
164: <li>Chroot jailing
165: <li>New uids
166: <li>ProPolice
167: <li>... and others
168: </ul>
169: <p>
170:
1.294 david 171: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 172:
1.45 deraadt 173: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 174: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 175: commonplace in security forums like
1.197 jufi 176: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 177:
1.45 deraadt 178: The most intense part of our security auditing happened immediately
1.80 espie 179: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 180: over the last third of 1996 and first half of 1997. Thousands (yes,
181: thousands) of security issues were fixed rapidly over this year-long
182: period; bugs like the standard buffer overflows, protocol
183: implementation weaknesses, information gathering, and filesystem
184: races. Hence most of the security problems that we encountered were
185: fixed before our 2.1 release, and then a far smaller number needed
186: fixing for our 2.2 release. We do not find as many problems anymore,
187: it is simply a case of diminishing returns. Recently the security
188: problems we find and fix tend to be significantly more obscure or
189: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 190:
1.35 deraadt 191: <ul>
1.45 deraadt 192: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 193: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 194: to search for more complicated exploits, so we will too.
195: <li>Finding and fixing subtle flaws in complicated software is
196: a lot of fun.
1.35 deraadt 197: </ul>
1.106 deraadt 198: <p>
1.15 deraadt 199:
1.14 deraadt 200: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 201: to find and fix new security flaws.<p>
1.12 deraadt 202:
1.288 matthieu 203: <a name="default"></a>
1.294 david 204: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 205:
206: To ensure that novice users of OpenBSD do not need to become security
207: experts overnight (a viewpoint which other vendors seem to have), we
208: ship the operating system in a Secure by Default mode. All non-essential
209: services are disabled. As the user/administrator becomes more familiar
210: with the system, he will discover that he has to enable daemons and other
211: parts of the system. During the process of learning how to enable a new
212: service, the novice is more likely to learn of security considerations.<p>
213:
214: This is in stark contrast to the increasing number of systems that
215: ship with NFS, mountd, web servers, and various other services enabled
216: by default, creating instantaneous security problems for their users
217: within minutes after their first install.<p>
218:
1.288 matthieu 219: <a name="crypto"></a>
1.294 david 220: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 221:
222: And of course, since the OpenBSD project is based in Canada, it is possible
223: for us to integrate cryptography. For more information, read the page
1.116 deraadt 224: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 225:
1.294 david 226: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 227:
228: <li>
1.346 matthieu 229: <a name="41"></a>
230:
231: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
232: These are the OpenBSD 4.1 advisories -- all these problems are solved
233: in <a href=anoncvs.html>OpenBSD current</a> and the
234: <a href=stable.html>patch branch</a>.
235:
236: <p>
237: <ul>
1.347 ! deraadt 238: <li><a href="errata41.html#009_file">Jul 9, 2007:
! 239: Fix possible heap overflow in file(1).</a>
1.346 matthieu 240: <li><a href="errata41.html#005_route6">Apr 27, 2007:
241: IPv6 type 0 route headers can be used to mount a DoS attack
242: against hosts and networks.</a>
243: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
244: Multiple vulnerabilities in X.Org.</a>
245: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
246: Incorrect mbuf handling for ICMP6 packets.</a>
247: </ul>
248:
249: <li>
1.334 brad 250: <a name="40"></a>
251: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
252: These are the OpenBSD 4.0 advisories -- all these problems are solved
253: in <a href=anoncvs.html>OpenBSD current</a> and the
254: <a href=stable.html>patch branch</a>.
255:
256: <p>
257: <ul>
1.347 ! deraadt 258: <li><a href="errata40.html#015_file">Jul 9, 2007:
! 259: Fix possible heap overflow in file(1).</a>
1.343 deraadt 260: <li><a href="errata40.html#012_route6">Apr 23, 2007:
261: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 262: against hosts and networks.</a>
1.342 mbalmer 263: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
264: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 265: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
266: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 267: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 268: Insufficient validation in vga(4) may allow an attacker to gain
269: root privileges on some i386 systems.</a>
1.339 deraadt 270: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 271: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 272: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 273: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
274: found by Chris Evans.</a>
1.339 deraadt 275: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 276: Several problems have been found in OpenSSL.</a>
1.339 deraadt 277: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 278: httpd(8) does not sanitize the Expect header from an HTTP request
279: when it is reflected back in an error message, which might allow
280: cross-site scripting (XSS) style attacks.</a>
281: </ul>
282:
283: <li>
1.321 brad 284: <a name="39"></a>
285:
286: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
287: These are the OpenBSD 3.9 advisories -- all these problems are solved
288: in <a href=anoncvs.html>OpenBSD current</a> and the
289: <a href=stable.html>patch branch</a>.
290:
291: <p>
292: <ul>
1.343 deraadt 293: <li><a href="errata39.html#022_route6">Apr 23, 2007:
294: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 295: against hosts and networks.</a>
1.342 mbalmer 296: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
297: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 298: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
299: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 300: <li><a href="errata39.html#agp">Jan 3, 2007:
301: Insufficient validation in vga(4) may allow an attacker to gain
302: root privileges on some i386 systems.</a>
1.336 brad 303: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 304: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 305: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 306: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 307: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 308: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 309: found by Chris Evans.</a>
1.333 deraadt 310: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 311: Several problems have been found in OpenSSL.</a>
1.333 deraadt 312: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 313: httpd(8) does not sanitize the Expect header from an HTTP request
314: when it is reflected back in an error message, which might allow
315: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 316: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 317: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
318: possible for an attacker to construct an invalid signature which
319: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 320: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 321: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 322: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 323: Due to the failure to correctly validate LCP configuration option
324: lengths, it is possible for an attacker to send LCP packets via an
325: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 326: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 327: A problem in isakmpd(8) caused IPsec to run partly without replay
328: protection.</a>
1.333 deraadt 329: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 330: It is possible to cause the kernel to panic when more than the default
331: number of sempahores have been allocated.</a>
1.333 deraadt 332: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 333: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
334: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
335: option.</a>
1.333 deraadt 336: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 337: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 338: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 339: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
340: overflow.</a>
1.333 deraadt 341: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 342: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 343: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 344: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 345: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 346: A race condition has been reported to exist in the handling by sendmail
347: of asynchronous signals.</a>
348: </ul>
349:
1.338 miod 350: <p>
351: OpenBSD 3.8 and earlier releases are not supported anymore. The following
352: paragraphs only list advisories issued while they were maintained; these
353: releases are likely to be affected by the advisories for more recent releases.
354: <br>
355:
1.321 brad 356: <li>
1.318 deraadt 357: <a name="38"></a>
358:
359: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
360: These are the OpenBSD 3.8 advisories -- all these problems are solved
361: in <a href=anoncvs.html>OpenBSD current</a> and the
362: <a href=stable.html>patch branch</a>.
363:
364: <p>
365: <ul>
1.332 brad 366: <li><a href="errata38.html#ssh2">Oct 12, 2006:
367: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 368: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 369: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 370: found by Chris Evans.</a>
371: <li><a href="errata38.html#openssl2">Oct 7, 2006:
372: Several problems have been found in OpenSSL.</a>
373: <li><a href="errata38.html#httpd2">Oct 7, 2006:
374: httpd(8) does not sanitize the Expect header from an HTTP request
375: when it is reflected back in an error message, which might allow
376: cross-site scripting (XSS) style attacks.</a>
1.329 brad 377: <li><a href="errata38.html#openssl">Sep 8, 2006:
378: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
379: possible for an attacker to construct an invalid signature which
380: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 381: <li><a href="errata38.html#bind">Sep 8, 2006:
382: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 383: <li><a href="errata38.html#sppp">Sep 2, 2006:
384: Due to the failure to correctly validate LCP configuration option
385: lengths, it is possible for an attacker to send LCP packets via an
386: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 387: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
388: A problem in isakmpd(8) caused IPsec to run partly without replay
389: protection.</a>
390: <li><a href="errata38.html#sem">Aug 25, 2006:
391: It is possible to cause the kernel to panic when more than the default
392: number of sempahores have been allocated.</a>
393: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
394: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
395: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
396: option.</a>
397: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
398: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 399: <li><a href="errata38.html#httpd">Jul 30, 2006:
400: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
401: overflow.</a>
1.324 brad 402: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
403: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 404: <li><a href="errata38.html#xorg">May 2, 2006:
405: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 406: <li><a href="errata38.html#sendmail">Mar 25, 2006:
407: A race condition has been reported to exist in the handling by sendmail
408: of asynchronous signals.</a>
409: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 410: Josh Bressers has reported a weakness in OpenSSH caused due to the
411: insecure use of the system(3) function in scp(1) when performing copy
412: operations using filenames that are supplied by the user from the
413: command line.</a>
1.321 brad 414: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 415: Do not allow users to trick suid programs into re-opening files via
416: /dev/fd.</a>
1.321 brad 417: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 418: A buffer overflow has been found in the Perl interpreter with the
419: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 420: </ul>
421:
422: <li>
1.312 david 423: <a name="37"></a>
424:
425: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
426: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 427: in <a href="anoncvs.html">OpenBSD current</a>. The
428: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
429: you should update your machine.
1.312 david 430:
431: <p>
432: <ul>
1.322 brad 433: <li><a href="errata37.html#xorg">May 2, 2006:
434: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 435: <li><a href="errata37.html#sendmail">Mar 25, 2006:
436: A race condition has been reported to exist in the handling by sendmail
437: of asynchronous signals.</a>
1.320 brad 438: <li><a href="errata37.html#ssh">Feb 12, 2006:
439: Josh Bressers has reported a weakness in OpenSSH caused due to the
440: insecure use of the system(3) function in scp(1) when performing copy
441: operations using filenames that are supplied by the user from the
442: command line.</a>
1.319 brad 443: <li><a href="errata37.html#fd">Jan 5, 2006:
444: Do not allow users to trick suid programs into re-opening files via
445: /dev/fd.</a>
446: <li><a href="errata37.html#perl">Jan 5, 2006:
447: A buffer overflow has been found in the Perl interpreter with the
448: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 449: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 450: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 451: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 452: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 453: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 454: Fix a race condition in sudo(8) that could allow a user
1.315 millert 455: to run arbitrary commands.</a>
1.318 deraadt 456: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 457: Fix a buffer overflow, memory leaks, and NULL pointer
458: dereference in cvs(1).</a>
1.312 david 459: </ul>
460:
461: <li>
1.301 miod 462: <a name="36"></a>
463:
464: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
465: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 466: in <a href="anoncvs.html">OpenBSD current</a>. The
467: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
468: you should update your machine.
1.301 miod 469:
470: <p>
1.302 markus 471: <ul>
1.317 millert 472: <li><a href="errata36.html#libz2">Jul 21, 2005:
473: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 474: <li><a href="errata36.html#libz">Jul 6, 2005:
475: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 476: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 477: Fix a race condition in sudo(8) that could allow a user
1.315 millert 478: to run arbitrary commands.</a>
1.311 deraadt 479: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 480: Fix a buffer overflow, memory leaks, and NULL pointer
481: dereference in cvs(1).</a>
1.311 deraadt 482: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 483: Due to buffer overflows in telnet(1), a malicious
484: server or man-in-the-middle attack could allow
485: execution of arbitrary code with the privileges of
486: the user invoking telnet(1).</a>
1.311 deraadt 487: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 488: More stringent checking should be done in the copy(9)
489: functions to prevent their misuse.</a>
1.311 deraadt 490: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 491: More stringent checking should be done in the copy(9)
492: functions to prevent their misuse.</a>
1.311 deraadt 493: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 494: httpd(8)'s mod_include module fails to properly validate
495: the length of user supplied tag strings prior to copying
1.305 brad 496: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 497: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 498: On systems running isakmpd(8) it is possible for a local
499: user to cause kernel memory corruption and system panic by
1.303 markus 500: setting ipsec(4) credentials on a socket.</a>
1.302 markus 501: </ul>
1.301 miod 502:
503: <li>
1.288 matthieu 504: <a name="35"></a>
1.279 deraadt 505:
1.294 david 506: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 507: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 508: in <a href="anoncvs.html">OpenBSD current</a>. The
509: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
510: you should update your machine.
1.279 deraadt 511:
512: <p>
513: <ul>
1.310 brad 514: <li><a href="errata35.html#cvs4">Apr 28, 2005:
515: Fix a buffer overflow, memory leaks, and NULL pointer
516: dereference in cvs(1).</a>
1.309 brad 517: <li><a href="errata35.html#telnet">Mar 30, 2005:
518: Due to buffer overflows in telnet(1), a malicious
519: server or man-in-the-middle attack could allow
520: execution of arbitrary code with the privileges of
521: the user invoking telnet(1).</a>
1.308 brad 522: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 523: More stringent checking should be done in the copy(9)
524: functions to prevent their misuse.</a>
1.306 brad 525: <li><a href="errata35.html#locore">Feb 28, 2005:
526: More stringent checking should be done in the copy(9)
527: functions to prevent their misuse.</a>
1.304 brad 528: <li><a href="errata35.html#httpd3">Jan 12, 2005:
529: httpd(8)'s mod_include module fails to properly validate
530: the length of user supplied tag strings prior to copying
1.305 brad 531: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 532: <li><a href="errata35.html#pfkey">Dec 14, 2004:
533: On systems running isakmpd(8) it is possible for a local
534: user to cause kernel memory corruption and system panic by
1.303 markus 535: setting ipsec(4) credentials on a socket.</a>
1.301 miod 536: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 537: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 538: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 539: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 540: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 541: httpd(8)'s mod_rewrite module can be made to write one zero byte in
542: an arbitrary memory position outside of a char array, causing a DoS
543: or possibly buffer overflows.</a>
1.301 miod 544: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 545: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 546: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 547: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 548: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 549: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 550: Multiple remote vulnerabilities have been found in the cvs(1)
551: server which can be used by CVS clients to crash or execute
1.293 brad 552: arbitrary code on the server.</a>
1.301 miod 553: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 554: kdc(8) performs inadequate checking of request fields, leading
555: to the possibility of principal impersonation from other
556: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 557: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 558: xdm(1) ignores the requestPort resource and creates a
1.293 brad 559: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 560: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 561: A buffer overflow in the cvs(1) server has been found,
562: which can be used by CVS clients to execute arbitrary code on
1.293 brad 563: the server.</a>
1.301 miod 564: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 565: Integer overflow problems were found in procfs, allowing
1.293 brad 566: reading of arbitrary kernel memory.</a>
1.301 miod 567: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 568: Pathname validation problems have been found in cvs(1),
569: allowing clients and servers access to files outside the
1.293 brad 570: repository or local CVS tree.</a>
1.279 deraadt 571: </ul>
572:
573: <p>
574: <li>
1.288 matthieu 575: <a name="34"></a>
1.261 david 576:
1.294 david 577: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 578: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 579: in <a href="anoncvs.html">OpenBSD current</a>. The
580: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
581: you should update your machine.
1.261 david 582: <p>
583: <ul>
1.302 markus 584: <li><a href="errata34.html#pfkey">Dec 14, 2004:
585: On systems running isakmpd(8) it is possible for a local
586: user to cause kernel memory corruption and system panic by
1.303 markus 587: setting ipsec(4) credentials on a socket.</a>
1.298 brad 588: <li><a href="errata34.html#xpm">Sep 16, 2004:
589: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 590: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
591: httpd(8)'s mod_rewrite module can be made to write one zero byte in
592: an arbitrary memory position outside of a char array, causing a DoS
593: or possibly buffer overflows.</a>
1.294 david 594: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 595: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 596: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 597: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 598: an attacker can delete IPsec tunnels at will.</a>
1.294 david 599: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 600: Multiple remote vulnerabilities have been found in the cvs(1)
601: server which can be used by CVS clients to crash or execute
1.293 brad 602: arbitrary code on the server.</a>
1.294 david 603: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 604: kdc(8) performs inadequate checking of request fields, leading
605: to the possibility of principal impersonation from other
606: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 607: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 608: A buffer overflow in the cvs(1) server has been found,
609: which can be used by CVS clients to execute arbitrary code on
610: the server.</a>
1.294 david 611: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 612: Integer overflow problems were found in procfs, allowing
613: reading of arbitrary kernel memory.</a>
1.294 david 614: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 615: Pathname validation problems have been found in cvs(1),
616: allowing clients and servers access to files outside the
617: repository or local CVS tree.</a>
1.294 david 618: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 619: A missing check for a NULL-pointer dereference may allow a
1.281 otto 620: remote attacker to crash applications using OpenSSL.</a>
1.294 david 621: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 622: Defects in the payload validation and processing functions of
623: isakmpd have been discovered. An attacker could send malformed
624: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 625: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 626: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
627: access module, using IP addresses without a netmask on big endian
628: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 629: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 630: An IPv6 MTU handling problem exists that could be used by an
631: attacker to cause a denial of service attack.</a>
1.294 david 632: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 633: A reference counting bug in shmat(2) could be used to write to
634: kernel memory under certain circumstances.</a>
1.294 david 635: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 636: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 637: by Thomas Walpuski.</a>
1.294 david 638: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 639: It may be possible for a local user to overrun the stack in
640: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 641: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 642: The use of certain ASN.1 encodings or malformed public keys may
643: allow an attacker to mount a denial of service attack against
644: applications linked with ssl(3).</a>
1.261 david 645: </ul>
646:
647: <li>
1.288 matthieu 648: <a name="33"></a>
1.246 deraadt 649:
1.294 david 650: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 651: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 652: in <a href="anoncvs.html">OpenBSD current</a>. The
653: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 654: you should update your machine.
1.246 deraadt 655: <p>
656: <ul>
1.294 david 657: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 658: Pathname validation problems have been found in cvs(1),
659: allowing clients and servers access to files outside the
660: repository or local CVS tree.</a>
1.294 david 661: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 662: A missing check for a NULL-pointer dereference may allow a
1.281 otto 663: remote attacker to crash applications using OpenSSL.</a>
1.294 david 664: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 665: Defects in the payload validation and processing functions of
666: isakmpd have been discovered. An attacker could send malformed
667: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 668: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 669: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
670: access module, using IP addresses without a netmask on big endian
671: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 672: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 673: An IPv6 MTU handling problem exists that could be used by an
674: attacker to cause a denial of service attack.</a>
1.294 david 675: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 676: A reference counting bug in shmat(2) could be used to write to
677: kernel memory under certain circumstances.</a>
1.294 david 678: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 679: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 680: by Thomas Walpuski.</a>
1.294 david 681: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 682: It may be possible for a local user to execute arbitrary code
683: resulting in escalation of privileges due to a stack overrun
684: in compat_ibcs2(8).</a>
1.294 david 685: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 686: The use of certain ASN.1 encodings or malformed public keys may
687: allow an attacker to mount a denial of service attack against
688: applications linked with ssl(3).</a>
1.294 david 689: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 690: Access of freed memory in pf(4) could be used to
1.260 margarid 691: remotely panic a machine using scrub rules.</a>
1.294 david 692: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 693: A buffer overflow in the address parsing in
694: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 695: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 696: OpenSSH versions prior to 3.7 contains a buffer management error
697: that is potentially exploitable.</a>
1.294 david 698: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 699: Root may be able to reduce the security level by taking advantage of
700: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 701: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 702: An improper bounds check in the kernel may allow a local user
703: to panic the kernel.</a>
1.294 david 704: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 705: An off-by-one error exists in the C library function realpath(3)
706: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 707: </ul>
708:
1.265 miod 709:
1.247 david 710: <p>
1.246 deraadt 711: <li>
1.288 matthieu 712: <a name="32"></a>
1.224 deraadt 713:
1.294 david 714: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 715: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 716: in <a href="anoncvs.html">OpenBSD current</a>. The
717: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 718: you should update your machine.
1.224 deraadt 719: <p>
720: <ul>
1.294 david 721: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 722: The use of certain ASN.1 encodings or malformed public keys may
723: allow an attacker to mount a denial of service attack against
724: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 725: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 726: Access of freed memory in pf(4) could be used to
1.260 margarid 727: remotely panic a machine using scrub rules.</a>
1.294 david 728: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 729: A buffer overflow in the address parsing in
730: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 731: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 732: OpenSSH versions prior to 3.7 contains a buffer management error
733: that is potentially exploitable.</a>
1.294 david 734: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 735: Fix for a potential security issue in
736: sendmail(8) with respect to DNS maps.</a>
1.294 david 737: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 738: An off-by-one error exists in the C library function realpath(3)
739: may allow an attacker to gain escalated privileges.</a>
1.294 david 740: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 741: A buffer overflow in the address parsing in
742: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 743: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 744: A cryptographic weaknesses in the Kerberos v4 protocol can be
745: exploited on Kerberos v5 as well.</a>
1.294 david 746: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 747: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 748: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 749: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 750: Various SSL and TLS operations in OpenSSL are vulnerable to
751: timing attacks.</a>
1.294 david 752: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 753: A buffer overflow in lprm(1) may allow an attacker to elevate
754: privileges to user daemon.</a>.
1.294 david 755: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 756: A buffer overflow in the envelope comments processing in
757: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 758: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 759: httpd(8) leaks file inode numbers via ETag header as well as
760: child PIDs in multipart MIME boundary generation. This could
761: lead, for example, to NFS exploitation because it uses inode
762: numbers as part of the file handle.</a>
1.294 david 763: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 764: In ssl(8) an information leak can occur via timing by performing
765: a MAC computation even if incorrect block cipher padding has
766: been found, this is a countermeasure. Also, check for negative
767: sizes, in allocation routines.</a>
1.294 david 768: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 769: A double free exists in cvs(1) that could lead to privilege
770: escalation for cvs configurations where the cvs command is
1.233 margarid 771: run as a privileged user.</a>
1.294 david 772: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 773: A buffer overflow exists in named(8) that could lead to a
774: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 775: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 776: A logic error in the pool kernel memory allocator could cause
777: memory corruption in low-memory situations, causing the system
778: to crash.</a>
1.294 david 779: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 780: An attacker can bypass smrsh(8)'s restrictions and execute
781: arbitrary commands with the privileges of his own account.</a>
1.294 david 782: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 783: Network bridges running pf with scrubbing enabled could cause
784: mbuf corruption, causing the system to crash.</a>
1.294 david 785: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 786: A buffer overflow can occur in the kadmind(8) daemon, leading
787: to possible remote crash or exploit.</a>
1.224 deraadt 788: </ul>
789:
1.227 miod 790: <p>
791: <li>
1.288 matthieu 792: <a name="31"></a>
1.203 deraadt 793:
1.294 david 794: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 795: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 796: in <a href="anoncvs.html">OpenBSD current</a>. The
797: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 798: you should update your machine.
1.203 deraadt 799:
800: <p>
801: <ul>
1.294 david 802: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 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="errata31.html#kerberos">March 24, 2003:
1.242 millert 806: A cryptographic weaknesses in the Kerberos v4 protocol can be
807: exploited on Kerberos v5 as well.</a>
1.294 david 808: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 809: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 810: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 811: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 812: Various SSL and TLS operations in OpenSSL are vulnerable to
813: timing attacks.</a>
1.294 david 814: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 815: A buffer overflow in lprm(1) may allow an attacker to gain
816: root privileges.</a>
1.294 david 817: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 818: A buffer overflow in the envelope comments processing in
819: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 820: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 821: In ssl(8) an information leak can occur via timing by performing
822: a MAC computation even if incorrect block cipher padding has
823: been found, this is a countermeasure. Also, check for negative
824: sizes, in allocation routines.</a>
1.294 david 825: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 826: A double free exists in cvs(1) that could lead to privilege
827: escalation for cvs configurations where the cvs command is
1.294 david 828: run as a privileged user</a>.
829: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 830: A buffer overflow exists in named(8) that could lead to a
831: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 832: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 833: Incorrect argument checking in the getitimer(2) system call
834: may allow an attacker to crash the system.</a>
1.294 david 835: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 836: An attacker can bypass smrsh(8)'s restrictions and execute
837: arbitrary commands with the privileges of his own account.</a>
1.294 david 838: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 839: A buffer overflow can occur in the kadmind(8) daemon, leading
840: to possible remote crash or exploit.</a>
1.294 david 841: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 842: Incorrect argument checking in the setitimer(2) system call
843: may allow an attacker to write to kernel memory.</a>
1.294 david 844: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 845: An insufficient boundary check in the select system call
1.220 miod 846: allows an attacker to overwrite kernel memory and execute arbitrary code
847: in kernel context.</a>
1.294 david 848: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 849: Several remote buffer overflows can occur in the SSL2 server and SSL3
850: client of the ssl(8) library, as in the ASN.1 parser code in the
851: crypto(3) library, all of them being potentially remotely
852: exploitable.</a>
1.294 david 853: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 854: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
855: possible remote crash.</a>
1.294 david 856: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 857: A race condition exists in the pppd(8) daemon which may cause it to
858: alter the file permissions of an arbitrary file.</a>
1.294 david 859: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 860: Receiving IKE payloads out of sequence can cause isakmpd(8) to
861: crash.</a>
1.294 david 862: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 863: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 864: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 865: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 866: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 867: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 868: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 869: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 870: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 871: input validation error that can result in an integer overflow and
872: privilege escalation.</a>
1.294 david 873: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 874: A buffer overflow can occur during the interpretation of chunked
875: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 876: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 877: Under certain conditions, on systems using YP with netgroups
878: in the password database, it is possible that sshd(8) does
879: ACL checks for the requested user name but uses the password
880: database entry of a different user for authentication. This
881: means that denied users might authenticate successfully
882: while permitted users could be locked out.</a>
1.294 david 883: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 884: A race condition exists that could defeat the kernel's
885: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 886: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 887: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 888: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 889: A local user can gain super-user privileges due to a buffer
890: overflow in sshd(8) if AFS has been configured on the system
891: or if KerberosTgtPassing or AFSTokenPassing has been enabled
892: in the sshd_config file.</a>
1.203 deraadt 893: </ul>
894:
1.235 miod 895: <p>
1.203 deraadt 896: <li>
1.288 matthieu 897: <a name="30"></a>
1.187 deraadt 898:
1.294 david 899: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 900: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 901: in <a href="anoncvs.html">OpenBSD current</a>. The
902: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 903: you should update your machine.
1.187 deraadt 904:
905: <p>
906: <ul>
1.294 david 907: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 908: A buffer overflow exists in named(8) that could lead to a
909: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 910: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 911: Incorrect argument checking in the getitimer(2) system call
912: may allow an attacker to crash the system.</a>
1.294 david 913: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 914: An attacker can bypass smrsh(8)'s restrictions and execute
915: arbitrary commands with the privileges of his own account.</a>
1.294 david 916: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 917: A buffer overflow can occur in the kadmind(8) daemon, leading
918: to possible remote crash or exploit.</a>
1.294 david 919: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 920: Incorrect argument checking in the setitimer(2) system call
921: may allow an attacker to write to kernel memory.</a>
1.294 david 922: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 923: An insufficient boundary check in the select and poll system calls
924: allows an attacker to overwrite kernel memory and execute arbitrary code
925: in kernel context.</a>
1.294 david 926: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 927: Several remote buffer overflows can occur in the SSL2 server and SSL3
928: client of the ssl(8) library, as in the ASN.1 parser code in the
929: crypto(3) library, all of them being potentially remotely
930: exploitable.</a>
1.294 david 931: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 932: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
933: possible remote crash.</a>
1.294 david 934: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 935: A race condition exists in the pppd(8) daemon which may cause it to
936: alter the file permissions of an arbitrary file.</a>
1.294 david 937: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 938: Receiving IKE payloads out of sequence can cause isakmpd(8) to
939: crash.</a>
1.294 david 940: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 941: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 942: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 943: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 944: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 945: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 946: input validation error that can result in an integer overflow and
947: privilege escalation.</a>
1.294 david 948: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 949: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 950: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 951: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 952: A buffer overflow can occur during the interpretation of chunked
953: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 954: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 955: A race condition exists that could defeat the kernel's
956: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 957: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 958: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 959: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 960: A local user can gain super-user privileges due to a buffer
961: overflow in sshd(8) if AFS has been configured on the system
962: or if KerberosTgtPassing or AFSTokenPassing has been enabled
963: in the sshd_config file.</a>
1.294 david 964: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 965: The mail(1) was interpreting tilde escapes even when invoked
966: in non-interactive mode. As mail(1) is called as root from cron,
967: this can lead to a local root compromise.</a>
1.294 david 968: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 969: Under certain conditions, on systems using YP with netgroups in
970: the password database, it is possible for the rexecd(8) and rshd(8)
971: daemons to execute a shell from a password database entry for a
972: different user. Similarly, atrun(8) may change to the wrong
973: home directory when running jobs.</a>
1.294 david 974: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 975: A potential double free() exists in the zlib library;
976: this is not exploitable on OpenBSD.
977: The kernel also contains a copy of zlib; it is not
978: currently known if the kernel zlib is exploitable.</a>
1.294 david 979: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 980: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 981: may allow a local user to gain super-user privileges.</a>
1.294 david 982: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 983: A race condition between the ptrace(2) and execve(2) system calls
984: allows an attacker to modify the memory contents of suid/sgid
985: processes which could lead to compromise of the super-user account.</a>
1.294 david 986: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 987: There is a security hole in sudo(8) that can be exploited
988: when the Postfix sendmail replacement is installed that may
989: allow an attacker on the local host to gain root privileges.</a>
1.294 david 990: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 991: An attacker can trick a machine running the lpd daemon into
992: creating new files in the root directory from a machine with
993: remote line printer access.</a>
1.294 david 994: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 995: The vi.recover script can be abused in such a way as
996: to cause arbitrary zero-length files to be removed.</a>
1.294 david 997: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 998: pf(4) was incapable of dealing with certain ipv6 icmp packets,
999: resulting in a crash.</a>
1.294 david 1000: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1001: A security hole that may allow an attacker to partially authenticate
1002: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1003: </ul>
1004:
1005: <p>
1006: <li>
1.288 matthieu 1007: <a name="29"></a>
1.173 deraadt 1008:
1.294 david 1009: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1010: These are the OpenBSD 2.9 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 2.9 is no longer being maintained,
1.258 beck 1013: you should update your machine.
1014:
1.173 deraadt 1015:
1016: <p>
1017: <ul>
1.294 david 1018: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1019: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1020: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1021: A race condition exists that could defeat the kernel's
1022: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1023: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1024: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1025: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1026: A local user can gain super-user privileges due to a buffer
1027: overflow in sshd(8) if AFS has been configured on the system
1028: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1029: in the sshd_config file.</a>
1.294 david 1030: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1031: The mail(1) was interpreting tilde escapes even when invoked
1032: in non-interactive mode. As mail(1) is called as root from cron,
1033: this can lead to a local root compromise.</a>
1.294 david 1034: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1035: A potential double free() exists in the zlib library;
1036: this is not exploitable on OpenBSD.
1037: The kernel also contains a copy of zlib; it is not
1038: currently known if the kernel zlib is exploitable.</a>
1.294 david 1039: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1040: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1041: may allow a local user to gain super-user privileges.</a>
1.294 david 1042: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1043: A race condition between the ptrace(2) and execve(2) system calls
1044: allows an attacker to modify the memory contents of suid/sgid
1045: processes which could lead to compromise of the super-user account.</a>
1.294 david 1046: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1047: There is a security hole in sudo(8) that can be exploited
1048: when the Postfix sendmail replacement is installed that may
1049: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1050: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1051: An attacker can trick a machine running the lpd daemon into
1052: creating new files in the root directory from a machine with
1053: remote line printer access.</a>
1.294 david 1054: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1055: The vi.recover script can be abused in such a way as
1056: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1057: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1058: A security hole exists in uuxqt(8) that may allow an
1059: attacker to gain root privileges.</a>
1.294 david 1060: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1061: A security hole exists in lpd(8) that may allow an
1062: attacker to gain root privileges if lpd is running.</a>
1.294 david 1063: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1064: A security hole exists in sendmail(8) that may allow an
1065: attacker on the local host to gain root privileges.</a>
1.294 david 1066: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1067: A kernel buffer overflow in the NFS code can be used to execute
1068: arbitrary code by users with mount privileges (only root by
1.181 millert 1069: default).</a>
1.294 david 1070: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1071: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1072: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1073: sshd(8) allows users to delete arbitrary files named "cookies"
1074: if X11 forwarding is enabled. X11 forwarding is disabled
1075: by default.</a>
1.294 david 1076: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1077: Programs using the fts routines can be tricked into changing
1078: into the wrong directory.</a>
1.294 david 1079: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1080: Sendmail signal handlers contain unsafe code,
1081: leading to numerous race conditions.</a>
1.173 deraadt 1082: </ul>
1083:
1084: <p>
1085: <li>
1.288 matthieu 1086: <a name="28"></a>
1.152 deraadt 1087:
1.294 david 1088: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1089: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1090: in <a href="anoncvs.html">OpenBSD current</a>. The
1091: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1092: you should update your machine.
1093:
1.152 deraadt 1094:
1095: <p>
1096: <ul>
1.294 david 1097: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1098: A security hole exists in uuxqt(8) that may allow an
1099: attacker to gain root privileges.</a>
1.294 david 1100: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1101: A security hole exists in lpd(8) that may allow an
1102: attacker to gain root privileges if lpd is running.</a>
1.294 david 1103: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1104: A security hole exists in sendmail(8) that may allow an
1105: attacker on the local host to gain root privileges.</a>
1.294 david 1106: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1107: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1108: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1109: Programs using the fts routines can be tricked into changing
1110: into the wrong directory.</a>
1.294 david 1111: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1112: Sendmail signal handlers contain unsafe code,
1113: leading to numerous race conditions.</a>
1.294 david 1114: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1115: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1116: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1117: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1118: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1119: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1120: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1121: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1122: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1123: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1124: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1125: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1126: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1127: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1128: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1129: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1130: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1131: rnd(4) did not use all of its input when written to.</a>
1.294 david 1132: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1133: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1134: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1135: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1136: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1137: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1138: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1139: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1140: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1141: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1142: </ul>
1143:
1144: <p>
1145: <li>
1.288 matthieu 1146: <a name="27"></a>
1.124 deraadt 1147:
1.294 david 1148: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1149: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1150: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1151: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1152:
1153: <p>
1154: <ul>
1.294 david 1155: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1156: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1157: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1158: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1159: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1160: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1161: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1162: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1163: (patch included)</a>
1.294 david 1164: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1165: X11 libraries have 2 potential overflows in xtrans code.
1166: (patch included)</a>
1.294 david 1167: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1168: Apache mod_rewrite and mod_vhost_alias modules could expose files
1169: on the server in certain configurations if used.
1170: (patch included)</a>
1.294 david 1171: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1172: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1173: TERMPATH and TERMCAP environment variables as it should.
1174: (patch included)</a>
1.294 david 1175: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1176: There are printf-style format string bugs in several privileged
1177: programs. (patch included)</a>
1.294 david 1178: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1179: libcurses honored terminal descriptions in the $HOME/.terminfo
1180: directory as well as in the TERMCAP environment variable for
1181: setuid and setgid applications.
1.146 deraadt 1182: (patch included)</a>
1.294 david 1183: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1184: A format string vulnerability exists in talkd(8).
1185: (patch included)</a>
1.294 david 1186: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1187: A format string vulnerability exists in the pw_error() function of the
1188: libutil library, yielding localhost root through chpass(1).
1189: (patch included)</a>
1.294 david 1190: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1191: Bad ESP/AH packets could cause a crash under certain conditions.
1192: (patch included)</a>
1.294 david 1193: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1194: A format string vulnerability (localhost root) exists in xlock(1).
1195: (patch included)</a>
1.294 david 1196: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1197: Various bugs found in X11 libraries have various side effects, almost
1198: completely denial of service in OpenBSD.
1199: (patch included)</a>
1.294 david 1200: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1201: Just like pretty much all the other unix ftp daemons
1202: on the planet, ftpd had a remote root hole in it.
1203: Luckily, ftpd was not enabled by default.
1.137 deraadt 1204: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1205: (patch included)</a>
1.294 david 1206: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1207: Mopd, very rarely used, contained some buffer overflows.
1208: (patch included)</a>
1.294 david 1209: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1210: libedit would check for a <b>.editrc</b> file in the current
1211: directory. Not known to be a real security issue, but a patch
1212: is available anyways.
1213: (patch included)</a>
1.294 david 1214: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1215: A serious bug in dhclient(8) could allow strings from a
1216: malicious dhcp server to be executed in the shell as root.
1217: (patch included)</a>
1.294 david 1218: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1219: A serious bug in isakmpd(8) policy handling wherein
1220: policy verification could be completely bypassed in isakmpd.
1221: (patch included)</a>
1.294 david 1222: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1223: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1224: should not be used, and results in security problems on
1225: other operating systems.</a>
1.294 david 1226: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1227: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1228: (patch included)</a>
1.294 david 1229: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1230: Improper use of ipf <i>keep-state</i> rules can result
1231: in firewall rules being bypassed. (patch included)</a>
1232:
1.124 deraadt 1233: </ul>
1234:
1235: <p>
1236: <li>
1.288 matthieu 1237: <a name="26"></a>
1.119 deraadt 1238:
1.294 david 1239: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1240: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1241: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1242: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1243:
1244: <p>
1245: <ul>
1.294 david 1246: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1247: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1248: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1249: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1250: Improper use of ipf <i>keep-state</i> rules can result
1251: in firewall rules being bypassed. (patch included)</a>
1.294 david 1252: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1253: xlockmore has a bug which a localhost attacker can use to gain
1254: access to the encrypted root password hash (which is normally
1.245 miod 1255: encoded using blowfish</a> (see
1.294 david 1256: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1257: crypt(3)</a>)
1.245 miod 1258: (patch included).
1.294 david 1259: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1260: Systems running with procfs enabled and mounted are
1261: vulnerable to a very tricky exploit. procfs is not
1262: mounted by default.
1263: (patch included).</a>
1.294 david 1264: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1265: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1266: thus exposing the system to a race where the aliases file
1267: did not exist.
1.119 deraadt 1268: (patch included).</a>
1.294 david 1269: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1270: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1271: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1272: A buffer overflow in the RSAREF code included in the
1273: USA version of libssl, is possibly exploitable in
1274: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1275: (patch included).<br></a>
1276: <strong>Update:</strong> Turns out that this was not exploitable
1277: in any of the software included in OpenBSD 2.6.
1.294 david 1278: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1279: Any user could change interface media configurations, resulting in
1280: a localhost denial of service attack.
1.121 deraadt 1281: (patch included).</a>
1.119 deraadt 1282: </ul>
1283:
1284: <p>
1285: <li>
1.288 matthieu 1286: <a name="25"></a>
1.106 deraadt 1287:
1.294 david 1288: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1289: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1290: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1291: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1292:
1.96 deraadt 1293: <p>
1.104 deraadt 1294: <ul>
1.294 david 1295: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1296: In cron(8), make sure argv[] is NULL terminated in the
1297: fake popen() and run sendmail as the user, not as root.
1298: (patch included).</a>
1.294 david 1299: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1300: filesystems had an overrun in their handling of uio_offset
1301: in their readdir() routines. (These filesystems are not
1302: enabled by default). (patch included).</a>
1.294 david 1303: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1304: when we execve() a new process. (patch included).</a>
1.294 david 1305: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1306: been handled by IPsec may be transmitted as cleartext.
1307: PF_KEY SA expirations may leak kernel resources.
1308: (patch included).</a>
1.294 david 1309: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1310: motd re-writing and change the find(1) to use -execdir
1311: (patch included).</a>
1.294 david 1312: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1313: users to chflags(2) or fchflags(2) on character or block devices
1314: which they may currently be the owner of (patch included).</a>
1.294 david 1315: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1316: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1317: </ul>
1318:
1.106 deraadt 1319: <p>
1320: <li>
1.288 matthieu 1321: <a name="24"></a>
1.235 miod 1322:
1.294 david 1323: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1324: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1325: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1326: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1327:
1.96 deraadt 1328: <p>
1.75 deraadt 1329: <ul>
1.294 david 1330: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1331: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1332: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1333: another kernel crash case caused by the <strong>crashme</strong>
1334: program (patch included).</a>
1.294 david 1335: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1336: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1337: (patch included).</a>
1.294 david 1338: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1339: existed in ping(8). (patch included).</a>
1.294 david 1340: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1341: the ipq, which could permit an attacker to cause a crash.
1342: (patch included).</a>
1.294 david 1343: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1344: kernel between accept(2) and select(2) could permit an attacker
1345: to hang sockets from remote.
1346: (patch included).</a>
1.294 david 1347: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1348: bog the machine excessively and cause problems.
1349: (patch included).</a>
1.294 david 1350: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1351: DDB interacted to possibly cause a crash.
1352: (patch included).</a>
1.294 david 1353: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1354: (patch included).</a>
1.294 david 1355: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1356: problem in bootpd(8). (patch included).</a>
1.294 david 1357: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1358: exploitable problem relating to environment variables in termcap
1359: and curses. (patch included).</a>
1.294 david 1360: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1361: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1362: </ul>
1363:
1.106 deraadt 1364: <p>
1365: <li>
1.288 matthieu 1366: <a name="23"></a>
1.235 miod 1367:
1.294 david 1368: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1369: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1370: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1371: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1372:
1.96 deraadt 1373: <p>
1.53 matthieu 1374: <ul>
1.294 david 1375: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1376: problem in bootpd(8). (patch included).</a>
1.294 david 1377: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1378: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1379: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1380: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1381: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1382: chpass(1) has a file descriptor leak which allows an
1383: attacker to modify /etc/master.passwd.</a>
1.294 david 1384: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1385: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1386: should not be executed with fd slots 0, 1, or 2 free.
1387: (patch included).</a>
1.294 david 1388: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1389: libraries (patches included).</a>
1.294 david 1390: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1391: processes too permissive (4th revision patch included).</a>
1.294 david 1392: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1393: of immutable and append-only file flags. (patch included).</a>
1.294 david 1394: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1395: if IPSEC is enabled (patch included).</a>
1.294 david 1396: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1397: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1398: </ul>
1.9 deraadt 1399:
1.106 deraadt 1400: <p>
1401: <li>
1.288 matthieu 1402: <a name="22"></a>
1.235 miod 1403:
1.294 david 1404: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1405: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1406: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1407: still exist in other operating systems. (The supplied patches are for
1408: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1409:
1.96 deraadt 1410: <p>
1.9 deraadt 1411: <ul>
1.294 david 1412: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1413: packets if IPSEC is enabled (patch included).</a>
1.294 david 1414: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1415: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1416: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1417: (patch included).</a>
1.294 david 1418: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1419: (patch included).</a>
1.294 david 1420: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1421: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1422: (patch included).</a>
1.294 david 1423: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1424: export (patch included).</a>
1.112 philen 1425: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1426: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1427: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1428: Acceptance.</a>
1.294 david 1429: A patch is available <a href="errata22.html#sourceroute">here</a>.
1430: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1431: flaw (patch included).</a>
1.294 david 1432: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1433: </ul>
1434:
1.106 deraadt 1435: <p>
1436: <li>
1.288 matthieu 1437: <a name="21"></a>
1.235 miod 1438:
1.294 david 1439: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1440: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1441: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1442: exist in other operating systems. (If you are running OpenBSD 2.1, we
1443: would strongly recommend an upgrade to the newest release, as this
1444: patch list only attempts at fixing the most important security
1445: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1446: security problems. Many of those problems were solved in ways which
1447: make it hard for us to provide patches).
1448:
1.96 deraadt 1449: <p>
1.52 deraadt 1450: <ul>
1.112 philen 1451: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1452: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1453: (patch included)</a>
1.112 philen 1454: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1455: </ul>
1.51 deraadt 1456:
1.106 deraadt 1457: <p>
1458: <li>
1.288 matthieu 1459: <a name="20"></a>
1.235 miod 1460:
1.294 david 1461: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1462: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1463: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1464: exist in other operating systems. (If you are running OpenBSD 2.0, we
1465: commend you for being there back in the old days!, but you're really
1466: missing out if you don't install a new version!)
1467:
1468: <p>
1469: <ul>
1.112 philen 1470: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1471: resolver (patch included)</a>
1472: <li>Many others... if people can hunt them down, please let me know
1473: and we'll put them up here.
1474: </ul>
1.51 deraadt 1475: <p>
1.106 deraadt 1476:
1.288 matthieu 1477: <a name="watching"></a>
1.294 david 1478: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1479:
1.21 deraadt 1480: Since we take a proactive stance with security, we are continually
1481: finding and fixing new security problems. Not all of these problems
1.80 espie 1482: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1483: confirmed to be exploitable; many simple bugs we fix do turn out to
1484: have security consequences we could not predict. We do not have the
1485: time resources to make these changes available in the above format.<p>
1.21 deraadt 1486:
1487: Thus there are usually minor security fixes in the current source code
1488: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1489: guarantee that these problems are of minimal impact and unproven
1.44 ian 1490: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1491: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1492:
1.45 deraadt 1493: People who are really concerned with security can do a number of
1494: things:<p>
1.21 deraadt 1495:
1496: <ul>
1497: <li>If you understand security issues, watch our
1.294 david 1498: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1499: eye out for things which appear security related. Since
1.21 deraadt 1500: exploitability is not proven for many of the fixes we make,
1501: do not expect the relevant commit message to say "SECURITY FIX!".
1502: If a problem is proven and serious, a patch will be available
1503: here very shortly after.
1.161 horacio 1504: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1505: security-announce mailing list</a> which will notify you for every
1.186 ian 1506: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1507: and instruct you on how to patch the problem.
1.21 deraadt 1508: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1509: complete system build from time to time (read /usr/src/Makefile
1510: carefully). Users can make the assumption that the current
1511: source tree always has stronger security than the previous release.
1.45 deraadt 1512: However, building your own system from source code is not trivial;
1.265 miod 1513: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1514: transition between major releases.
1.115 ericj 1515: <li>Install a binary snapshot for your
1.80 espie 1516: architecture, which are made available fairly often. For
1.29 deraadt 1517: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1518: </ul>
1519:
1.9 deraadt 1520: <p>
1.288 matthieu 1521: <a name="reporting"></a>
1.294 david 1522: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1523:
1.5 deraadt 1524: <p> If you find a new security problem, you can mail it to
1.294 david 1525: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1526: <br>
1.5 deraadt 1527: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1528: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1529:
1.107 deraadt 1530: <p>
1.288 matthieu 1531: <a name="papers"></a>
1.294 david 1532: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1533:
1534: A number of papers have been written by OpenBSD team members, about security
1535: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1536: documents are available as follows.<p>
1.107 deraadt 1537:
1538: <ul>
1.113 deraadt 1539: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1540: <a href="events.html#usenix99">Usenix 1999</a>,
1541: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1542: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1543: <a href="papers/bcrypt-paper.ps">paper</a> and
1544: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1545: <p>
1546: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1547: <a href="events.html#usenix99">Usenix 1999</a>,
1548: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1549: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1550: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1551: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1552: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1553: <a href="papers/crypt-paper.ps">paper</a> and
1554: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1555: <p>
1556: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1557: <a href="events.html#usenix99">Usenix 1999</a>,
1558: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1559: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1560: <a href="papers/strlcpy-paper.ps">paper</a> and
1561: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1562: <p>
1.118 deraadt 1563: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1564: <a href="events.html#lisa99">LISA 1999</a>,
1565: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1566: <a href="papers/authgw-paper.ps">paper</a> and
1567: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1568: <p>
1.153 jufi 1569: <li>Encrypting Virtual Memory<br>
1.294 david 1570: <a href="events.html#sec2000">Usenix Security 2000</a>,
1571: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1572: <a href="papers/swapencrypt.ps">paper</a> and
1573: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1574: <p>
1.107 deraadt 1575: </ul>
1.294 david 1576: </ul>
1.106 deraadt 1577:
1.2 deraadt 1578: <hr>
1.294 david 1579: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1580: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1581: <br>
1.347 ! deraadt 1582: <small>$OpenBSD: security.html,v 1.346 2007/05/08 08:51:10 matthieu Exp $</small>
1.1 deraadt 1583:
1.24 deraadt 1584: </body>
1585: </html>
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