Annotation of www/security.html, Revision 1.343
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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>.
1.114 philen 64: </td>
65: </tr>
66: </table>
1.56 deraadt 67: <hr>
68:
1.294 david 69: <a name="goals"></a>
1.278 deraadt 70: <ul>
1.294 david 71: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 72:
1.14 deraadt 73: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 74: ONE in the industry for security (if we are not already there). Our
75: open software development model permits us to take a more
76: uncompromising view towards increased security than Sun, SGI, IBM, HP,
77: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 78: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 79: cryptography</a>, we are able to take cryptographic approaches towards
80: fixing security problems.<p>
1.18 deraadt 81:
1.288 matthieu 82: <a name="disclosure"></a>
1.294 david 83: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 84:
1.45 deraadt 85: Like many readers of the
1.196 jufi 86: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 87: BUGTRAQ mailing list</a>,
1.106 deraadt 88: we believe in full disclosure of security problems. In the
89: operating system arena, we were probably the first to embrace
90: the concept. Many vendors, even of free software, still try
91: to hide issues from their users.<p>
92:
93: Security information moves very fast in cracker circles. On the other
94: hand, our experience is that coding and releasing of proper security
95: fixes typically requires about an hour of work -- very fast fix
96: turnaround is possible. Thus we think that full disclosure helps the
97: people who really care about security.<p>
98:
1.288 matthieu 99: <a name="process"></a>
1.294 david 100: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 101:
1.12 deraadt 102: Our security auditing team typically has between six and twelve
1.45 deraadt 103: members who continue to search for and fix new security holes. We
104: have been auditing since the summer of 1996. The process we follow to
105: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 106: every critical software component. We are not so much looking for
107: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 108: years later someone discovers the problem used to be a security
1.106 deraadt 109: issue, and we fixed it because it was just a bug, well, all the
110: better. Flaws have been found in just about every area of the system.
111: Entire new classes of security problems have been found during our
112: audit, and often source code which had been audited earlier needs
113: re-auditing with these new flaws in mind. Code often gets audited
114: multiple times, and by multiple people with different auditing
115: skills.<p>
1.12 deraadt 116:
1.94 deraadt 117: Some members of our security auditing team worked for Secure Networks,
118: the company that made the industry's premier network security scanning
119: software package Ballista (Secure Networks got purchased by Network
120: Associates, Ballista got renamed to Cybercop Scanner, and well...)
121: That company did a lot of security research, and thus fit in well
1.106 deraadt 122: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
123: colours since day 1.<p>
1.31 deraadt 124:
1.34 deraadt 125: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 126: In most cases we have found that the determination of exploitability
127: is not an issue. During our ongoing auditing process we find many
128: bugs, and endeavor to fix them even though exploitability is not
129: proven. We fix the bug, and we move on to find other bugs to fix. We
130: have fixed many simple and obvious careless programming errors in code
131: and only months later discovered that the problems were in fact
132: exploitable. (Or, more likely someone on
1.197 jufi 133: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 134: would report that other operating systems were vulnerable to a `newly
135: discovered problem', and then it would be discovered that OpenBSD had
136: been fixed in a previous release). In other cases we have been saved
137: from full exploitability of complex step-by-step attacks because we
138: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 139: managed such a success is the lpd advisory that Secure Networks put out.
140: <p>
1.29 deraadt 141:
1.288 matthieu 142: <a name="newtech"></a>
1.294 david 143: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 144:
145: As we audit source code, we often invent new ways of solving problems.
146: Sometimes these ideas have been used before in some random application
147: written somewhere, but perhaps not taken to the degree that we do.
148: <p>
149:
150: <ul>
151: <li>strlcpy() and strlcat()
152: <li>Memory protection purify
153: <ul>
154: <li>W^X
155: <li>.rodata segment
156: <li>Guard pages
157: <li>Randomized malloc()
158: <li>Randomized mmap()
159: <li>atexit() and stdio protection
160: </ul>
1.295 otto 161: <li>Privilege separation
1.278 deraadt 162: <li>Privilege revocation
163: <li>Chroot jailing
164: <li>New uids
165: <li>ProPolice
166: <li>... and others
167: </ul>
168: <p>
169:
1.294 david 170: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 171:
1.45 deraadt 172: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 173: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 174: commonplace in security forums like
1.197 jufi 175: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 176:
1.45 deraadt 177: The most intense part of our security auditing happened immediately
1.80 espie 178: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 179: over the last third of 1996 and first half of 1997. Thousands (yes,
180: thousands) of security issues were fixed rapidly over this year-long
181: period; bugs like the standard buffer overflows, protocol
182: implementation weaknesses, information gathering, and filesystem
183: races. Hence most of the security problems that we encountered were
184: fixed before our 2.1 release, and then a far smaller number needed
185: fixing for our 2.2 release. We do not find as many problems anymore,
186: it is simply a case of diminishing returns. Recently the security
187: problems we find and fix tend to be significantly more obscure or
188: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 189:
1.35 deraadt 190: <ul>
1.45 deraadt 191: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 192: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 193: to search for more complicated exploits, so we will too.
194: <li>Finding and fixing subtle flaws in complicated software is
195: a lot of fun.
1.35 deraadt 196: </ul>
1.106 deraadt 197: <p>
1.15 deraadt 198:
1.14 deraadt 199: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 200: to find and fix new security flaws.<p>
1.12 deraadt 201:
1.288 matthieu 202: <a name="default"></a>
1.294 david 203: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 204:
205: To ensure that novice users of OpenBSD do not need to become security
206: experts overnight (a viewpoint which other vendors seem to have), we
207: ship the operating system in a Secure by Default mode. All non-essential
208: services are disabled. As the user/administrator becomes more familiar
209: with the system, he will discover that he has to enable daemons and other
210: parts of the system. During the process of learning how to enable a new
211: service, the novice is more likely to learn of security considerations.<p>
212:
213: This is in stark contrast to the increasing number of systems that
214: ship with NFS, mountd, web servers, and various other services enabled
215: by default, creating instantaneous security problems for their users
216: within minutes after their first install.<p>
217:
1.288 matthieu 218: <a name="crypto"></a>
1.294 david 219: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 220:
221: And of course, since the OpenBSD project is based in Canada, it is possible
222: for us to integrate cryptography. For more information, read the page
1.116 deraadt 223: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 224:
1.294 david 225: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 226:
227: <li>
1.334 brad 228: <a name="40"></a>
229:
230: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
231: These are the OpenBSD 4.0 advisories -- all these problems are solved
232: in <a href=anoncvs.html>OpenBSD current</a> and the
233: <a href=stable.html>patch branch</a>.
234:
235: <p>
236: <ul>
1.343 ! deraadt 237: <li><a href="errata40.html#012_route6">Apr 23, 2007:
! 238: IPv6 type 0 route headers can be used to mount a DoS attack
! 239: against hosts and networks.
1.342 mbalmer 240: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
241: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 242: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
243: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 244: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 245: Insufficient validation in vga(4) may allow an attacker to gain
246: root privileges on some i386 systems.</a>
1.339 deraadt 247: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 248: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 249: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 250: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
251: found by Chris Evans.</a>
1.339 deraadt 252: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 253: Several problems have been found in OpenSSL.</a>
1.339 deraadt 254: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 255: httpd(8) does not sanitize the Expect header from an HTTP request
256: when it is reflected back in an error message, which might allow
257: cross-site scripting (XSS) style attacks.</a>
258: </ul>
259:
260: <li>
1.321 brad 261: <a name="39"></a>
262:
263: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
264: These are the OpenBSD 3.9 advisories -- all these problems are solved
265: in <a href=anoncvs.html>OpenBSD current</a> and the
266: <a href=stable.html>patch branch</a>.
267:
268: <p>
269: <ul>
1.343 ! deraadt 270: <li><a href="errata39.html#022_route6">Apr 23, 2007:
! 271: IPv6 type 0 route headers can be used to mount a DoS attack
! 272: against hosts and networks.
1.342 mbalmer 273: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
274: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 275: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
276: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 277: <li><a href="errata39.html#agp">Jan 3, 2007:
278: Insufficient validation in vga(4) may allow an attacker to gain
279: root privileges on some i386 systems.</a>
1.336 brad 280: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 281: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 282: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 283: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 284: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 285: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 286: found by Chris Evans.</a>
1.333 deraadt 287: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 288: Several problems have been found in OpenSSL.</a>
1.333 deraadt 289: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 290: httpd(8) does not sanitize the Expect header from an HTTP request
291: when it is reflected back in an error message, which might allow
292: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 293: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 294: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
295: possible for an attacker to construct an invalid signature which
296: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 297: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 298: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 299: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 300: Due to the failure to correctly validate LCP configuration option
301: lengths, it is possible for an attacker to send LCP packets via an
302: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 303: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 304: A problem in isakmpd(8) caused IPsec to run partly without replay
305: protection.</a>
1.333 deraadt 306: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 307: It is possible to cause the kernel to panic when more than the default
308: number of sempahores have been allocated.</a>
1.333 deraadt 309: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 310: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
311: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
312: option.</a>
1.333 deraadt 313: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 314: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 315: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 316: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
317: overflow.</a>
1.333 deraadt 318: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 319: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 320: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 321: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 322: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 323: A race condition has been reported to exist in the handling by sendmail
324: of asynchronous signals.</a>
325: </ul>
326:
1.338 miod 327: <p>
328: OpenBSD 3.8 and earlier releases are not supported anymore. The following
329: paragraphs only list advisories issued while they were maintained; these
330: releases are likely to be affected by the advisories for more recent releases.
331: <br>
332:
1.321 brad 333: <li>
1.318 deraadt 334: <a name="38"></a>
335:
336: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
337: These are the OpenBSD 3.8 advisories -- all these problems are solved
338: in <a href=anoncvs.html>OpenBSD current</a> and the
339: <a href=stable.html>patch branch</a>.
340:
341: <p>
342: <ul>
1.332 brad 343: <li><a href="errata38.html#ssh2">Oct 12, 2006:
344: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 345: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 346: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 347: found by Chris Evans.</a>
348: <li><a href="errata38.html#openssl2">Oct 7, 2006:
349: Several problems have been found in OpenSSL.</a>
350: <li><a href="errata38.html#httpd2">Oct 7, 2006:
351: httpd(8) does not sanitize the Expect header from an HTTP request
352: when it is reflected back in an error message, which might allow
353: cross-site scripting (XSS) style attacks.</a>
1.329 brad 354: <li><a href="errata38.html#openssl">Sep 8, 2006:
355: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
356: possible for an attacker to construct an invalid signature which
357: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 358: <li><a href="errata38.html#bind">Sep 8, 2006:
359: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 360: <li><a href="errata38.html#sppp">Sep 2, 2006:
361: Due to the failure to correctly validate LCP configuration option
362: lengths, it is possible for an attacker to send LCP packets via an
363: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 364: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
365: A problem in isakmpd(8) caused IPsec to run partly without replay
366: protection.</a>
367: <li><a href="errata38.html#sem">Aug 25, 2006:
368: It is possible to cause the kernel to panic when more than the default
369: number of sempahores have been allocated.</a>
370: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
371: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
372: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
373: option.</a>
374: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
375: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 376: <li><a href="errata38.html#httpd">Jul 30, 2006:
377: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
378: overflow.</a>
1.324 brad 379: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
380: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 381: <li><a href="errata38.html#xorg">May 2, 2006:
382: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 383: <li><a href="errata38.html#sendmail">Mar 25, 2006:
384: A race condition has been reported to exist in the handling by sendmail
385: of asynchronous signals.</a>
386: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 387: Josh Bressers has reported a weakness in OpenSSH caused due to the
388: insecure use of the system(3) function in scp(1) when performing copy
389: operations using filenames that are supplied by the user from the
390: command line.</a>
1.321 brad 391: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 392: Do not allow users to trick suid programs into re-opening files via
393: /dev/fd.</a>
1.321 brad 394: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 395: A buffer overflow has been found in the Perl interpreter with the
396: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 397: </ul>
398:
399: <li>
1.312 david 400: <a name="37"></a>
401:
402: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
403: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 404: in <a href="anoncvs.html">OpenBSD current</a>. The
405: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
406: you should update your machine.
1.312 david 407:
408: <p>
409: <ul>
1.322 brad 410: <li><a href="errata37.html#xorg">May 2, 2006:
411: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 412: <li><a href="errata37.html#sendmail">Mar 25, 2006:
413: A race condition has been reported to exist in the handling by sendmail
414: of asynchronous signals.</a>
1.320 brad 415: <li><a href="errata37.html#ssh">Feb 12, 2006:
416: Josh Bressers has reported a weakness in OpenSSH caused due to the
417: insecure use of the system(3) function in scp(1) when performing copy
418: operations using filenames that are supplied by the user from the
419: command line.</a>
1.319 brad 420: <li><a href="errata37.html#fd">Jan 5, 2006:
421: Do not allow users to trick suid programs into re-opening files via
422: /dev/fd.</a>
423: <li><a href="errata37.html#perl">Jan 5, 2006:
424: A buffer overflow has been found in the Perl interpreter with the
425: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 426: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 427: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 428: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 429: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 430: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 431: Fix a race condition in sudo(8) that could allow a user
1.315 millert 432: to run arbitrary commands.</a>
1.318 deraadt 433: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 434: Fix a buffer overflow, memory leaks, and NULL pointer
435: dereference in cvs(1).</a>
1.312 david 436: </ul>
437:
438: <li>
1.301 miod 439: <a name="36"></a>
440:
441: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
442: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 443: in <a href="anoncvs.html">OpenBSD current</a>. The
444: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
445: you should update your machine.
1.301 miod 446:
447: <p>
1.302 markus 448: <ul>
1.317 millert 449: <li><a href="errata36.html#libz2">Jul 21, 2005:
450: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 451: <li><a href="errata36.html#libz">Jul 6, 2005:
452: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 453: <li><a href="errata36.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>
1.311 deraadt 456: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 457: Fix a buffer overflow, memory leaks, and NULL pointer
458: dereference in cvs(1).</a>
1.311 deraadt 459: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 460: Due to buffer overflows in telnet(1), a malicious
461: server or man-in-the-middle attack could allow
462: execution of arbitrary code with the privileges of
463: the user invoking telnet(1).</a>
1.311 deraadt 464: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 465: More stringent checking should be done in the copy(9)
466: functions to prevent their misuse.</a>
1.311 deraadt 467: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 468: More stringent checking should be done in the copy(9)
469: functions to prevent their misuse.</a>
1.311 deraadt 470: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 471: httpd(8)'s mod_include module fails to properly validate
472: the length of user supplied tag strings prior to copying
1.305 brad 473: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 474: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 475: On systems running isakmpd(8) it is possible for a local
476: user to cause kernel memory corruption and system panic by
1.303 markus 477: setting ipsec(4) credentials on a socket.</a>
1.302 markus 478: </ul>
1.301 miod 479:
480: <li>
1.288 matthieu 481: <a name="35"></a>
1.279 deraadt 482:
1.294 david 483: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 484: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 485: in <a href="anoncvs.html">OpenBSD current</a>. The
486: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
487: you should update your machine.
1.279 deraadt 488:
489: <p>
490: <ul>
1.310 brad 491: <li><a href="errata35.html#cvs4">Apr 28, 2005:
492: Fix a buffer overflow, memory leaks, and NULL pointer
493: dereference in cvs(1).</a>
1.309 brad 494: <li><a href="errata35.html#telnet">Mar 30, 2005:
495: Due to buffer overflows in telnet(1), a malicious
496: server or man-in-the-middle attack could allow
497: execution of arbitrary code with the privileges of
498: the user invoking telnet(1).</a>
1.308 brad 499: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 500: More stringent checking should be done in the copy(9)
501: functions to prevent their misuse.</a>
1.306 brad 502: <li><a href="errata35.html#locore">Feb 28, 2005:
503: More stringent checking should be done in the copy(9)
504: functions to prevent their misuse.</a>
1.304 brad 505: <li><a href="errata35.html#httpd3">Jan 12, 2005:
506: httpd(8)'s mod_include module fails to properly validate
507: the length of user supplied tag strings prior to copying
1.305 brad 508: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 509: <li><a href="errata35.html#pfkey">Dec 14, 2004:
510: On systems running isakmpd(8) it is possible for a local
511: user to cause kernel memory corruption and system panic by
1.303 markus 512: setting ipsec(4) credentials on a socket.</a>
1.301 miod 513: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 514: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 515: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 516: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 517: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 518: httpd(8)'s mod_rewrite module can be made to write one zero byte in
519: an arbitrary memory position outside of a char array, causing a DoS
520: or possibly buffer overflows.</a>
1.301 miod 521: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 522: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 523: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 524: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 525: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 526: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 527: Multiple remote vulnerabilities have been found in the cvs(1)
528: server which can be used by CVS clients to crash or execute
1.293 brad 529: arbitrary code on the server.</a>
1.301 miod 530: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 531: kdc(8) performs inadequate checking of request fields, leading
532: to the possibility of principal impersonation from other
533: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 534: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 535: xdm(1) ignores the requestPort resource and creates a
1.293 brad 536: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 537: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 538: A buffer overflow in the cvs(1) server has been found,
539: which can be used by CVS clients to execute arbitrary code on
1.293 brad 540: the server.</a>
1.301 miod 541: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 542: Integer overflow problems were found in procfs, allowing
1.293 brad 543: reading of arbitrary kernel memory.</a>
1.301 miod 544: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 545: Pathname validation problems have been found in cvs(1),
546: allowing clients and servers access to files outside the
1.293 brad 547: repository or local CVS tree.</a>
1.279 deraadt 548: </ul>
549:
550: <p>
551: <li>
1.288 matthieu 552: <a name="34"></a>
1.261 david 553:
1.294 david 554: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 555: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 556: in <a href="anoncvs.html">OpenBSD current</a>. The
557: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
558: you should update your machine.
1.261 david 559: <p>
560: <ul>
1.302 markus 561: <li><a href="errata34.html#pfkey">Dec 14, 2004:
562: On systems running isakmpd(8) it is possible for a local
563: user to cause kernel memory corruption and system panic by
1.303 markus 564: setting ipsec(4) credentials on a socket.</a>
1.298 brad 565: <li><a href="errata34.html#xpm">Sep 16, 2004:
566: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 567: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
568: httpd(8)'s mod_rewrite module can be made to write one zero byte in
569: an arbitrary memory position outside of a char array, causing a DoS
570: or possibly buffer overflows.</a>
1.294 david 571: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 572: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 573: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 574: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 575: an attacker can delete IPsec tunnels at will.</a>
1.294 david 576: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 577: Multiple remote vulnerabilities have been found in the cvs(1)
578: server which can be used by CVS clients to crash or execute
1.293 brad 579: arbitrary code on the server.</a>
1.294 david 580: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 581: kdc(8) performs inadequate checking of request fields, leading
582: to the possibility of principal impersonation from other
583: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 584: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 585: A buffer overflow in the cvs(1) server has been found,
586: which can be used by CVS clients to execute arbitrary code on
587: the server.</a>
1.294 david 588: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 589: Integer overflow problems were found in procfs, allowing
590: reading of arbitrary kernel memory.</a>
1.294 david 591: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 592: Pathname validation problems have been found in cvs(1),
593: allowing clients and servers access to files outside the
594: repository or local CVS tree.</a>
1.294 david 595: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 596: A missing check for a NULL-pointer dereference may allow a
1.281 otto 597: remote attacker to crash applications using OpenSSL.</a>
1.294 david 598: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 599: Defects in the payload validation and processing functions of
600: isakmpd have been discovered. An attacker could send malformed
601: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 602: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 603: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
604: access module, using IP addresses without a netmask on big endian
605: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 606: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 607: An IPv6 MTU handling problem exists that could be used by an
608: attacker to cause a denial of service attack.</a>
1.294 david 609: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 610: A reference counting bug in shmat(2) could be used to write to
611: kernel memory under certain circumstances.</a>
1.294 david 612: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 613: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 614: by Thomas Walpuski.</a>
1.294 david 615: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 616: It may be possible for a local user to overrun the stack in
617: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 618: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 619: The use of certain ASN.1 encodings or malformed public keys may
620: allow an attacker to mount a denial of service attack against
621: applications linked with ssl(3).</a>
1.261 david 622: </ul>
623:
624: <li>
1.288 matthieu 625: <a name="33"></a>
1.246 deraadt 626:
1.294 david 627: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 628: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 629: in <a href="anoncvs.html">OpenBSD current</a>. The
630: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 631: you should update your machine.
1.246 deraadt 632: <p>
633: <ul>
1.294 david 634: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 635: Pathname validation problems have been found in cvs(1),
636: allowing clients and servers access to files outside the
637: repository or local CVS tree.</a>
1.294 david 638: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 639: A missing check for a NULL-pointer dereference may allow a
1.281 otto 640: remote attacker to crash applications using OpenSSL.</a>
1.294 david 641: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 642: Defects in the payload validation and processing functions of
643: isakmpd have been discovered. An attacker could send malformed
644: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 645: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 646: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
647: access module, using IP addresses without a netmask on big endian
648: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 649: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 650: An IPv6 MTU handling problem exists that could be used by an
651: attacker to cause a denial of service attack.</a>
1.294 david 652: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 653: A reference counting bug in shmat(2) could be used to write to
654: kernel memory under certain circumstances.</a>
1.294 david 655: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 656: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 657: by Thomas Walpuski.</a>
1.294 david 658: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 659: It may be possible for a local user to execute arbitrary code
660: resulting in escalation of privileges due to a stack overrun
661: in compat_ibcs2(8).</a>
1.294 david 662: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 663: The use of certain ASN.1 encodings or malformed public keys may
664: allow an attacker to mount a denial of service attack against
665: applications linked with ssl(3).</a>
1.294 david 666: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 667: Access of freed memory in pf(4) could be used to
1.260 margarid 668: remotely panic a machine using scrub rules.</a>
1.294 david 669: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 670: A buffer overflow in the address parsing in
671: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 672: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 673: OpenSSH versions prior to 3.7 contains a buffer management error
674: that is potentially exploitable.</a>
1.294 david 675: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 676: Root may be able to reduce the security level by taking advantage of
677: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 678: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 679: An improper bounds check in the kernel may allow a local user
680: to panic the kernel.</a>
1.294 david 681: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 682: An off-by-one error exists in the C library function realpath(3)
683: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 684: </ul>
685:
1.265 miod 686:
1.247 david 687: <p>
1.246 deraadt 688: <li>
1.288 matthieu 689: <a name="32"></a>
1.224 deraadt 690:
1.294 david 691: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 692: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 693: in <a href="anoncvs.html">OpenBSD current</a>. The
694: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 695: you should update your machine.
1.224 deraadt 696: <p>
697: <ul>
1.294 david 698: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 699: The use of certain ASN.1 encodings or malformed public keys may
700: allow an attacker to mount a denial of service attack against
701: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 702: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 703: Access of freed memory in pf(4) could be used to
1.260 margarid 704: remotely panic a machine using scrub rules.</a>
1.294 david 705: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 706: A buffer overflow in the address parsing in
707: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 708: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 709: OpenSSH versions prior to 3.7 contains a buffer management error
710: that is potentially exploitable.</a>
1.294 david 711: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 712: Fix for a potential security issue in
713: sendmail(8) with respect to DNS maps.</a>
1.294 david 714: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 715: An off-by-one error exists in the C library function realpath(3)
716: may allow an attacker to gain escalated privileges.</a>
1.294 david 717: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 718: A buffer overflow in the address parsing in
719: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 720: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 721: A cryptographic weaknesses in the Kerberos v4 protocol can be
722: exploited on Kerberos v5 as well.</a>
1.294 david 723: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 724: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 725: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 726: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 727: Various SSL and TLS operations in OpenSSL are vulnerable to
728: timing attacks.</a>
1.294 david 729: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 730: A buffer overflow in lprm(1) may allow an attacker to elevate
731: privileges to user daemon.</a>.
1.294 david 732: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 733: A buffer overflow in the envelope comments processing in
734: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 735: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 736: httpd(8) leaks file inode numbers via ETag header as well as
737: child PIDs in multipart MIME boundary generation. This could
738: lead, for example, to NFS exploitation because it uses inode
739: numbers as part of the file handle.</a>
1.294 david 740: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 741: In ssl(8) an information leak can occur via timing by performing
742: a MAC computation even if incorrect block cipher padding has
743: been found, this is a countermeasure. Also, check for negative
744: sizes, in allocation routines.</a>
1.294 david 745: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 746: A double free exists in cvs(1) that could lead to privilege
747: escalation for cvs configurations where the cvs command is
1.233 margarid 748: run as a privileged user.</a>
1.294 david 749: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 750: A buffer overflow exists in named(8) that could lead to a
751: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 752: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 753: A logic error in the pool kernel memory allocator could cause
754: memory corruption in low-memory situations, causing the system
755: to crash.</a>
1.294 david 756: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 757: An attacker can bypass smrsh(8)'s restrictions and execute
758: arbitrary commands with the privileges of his own account.</a>
1.294 david 759: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 760: Network bridges running pf with scrubbing enabled could cause
761: mbuf corruption, causing the system to crash.</a>
1.294 david 762: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 763: A buffer overflow can occur in the kadmind(8) daemon, leading
764: to possible remote crash or exploit.</a>
1.224 deraadt 765: </ul>
766:
1.227 miod 767: <p>
768: <li>
1.288 matthieu 769: <a name="31"></a>
1.203 deraadt 770:
1.294 david 771: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 772: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 773: in <a href="anoncvs.html">OpenBSD current</a>. The
774: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 775: you should update your machine.
1.203 deraadt 776:
777: <p>
778: <ul>
1.294 david 779: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 780: A buffer overflow in the address parsing in
781: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 782: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 783: A cryptographic weaknesses in the Kerberos v4 protocol can be
784: exploited on Kerberos v5 as well.</a>
1.294 david 785: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 786: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 787: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 788: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 789: Various SSL and TLS operations in OpenSSL are vulnerable to
790: timing attacks.</a>
1.294 david 791: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 792: A buffer overflow in lprm(1) may allow an attacker to gain
793: root privileges.</a>
1.294 david 794: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 795: A buffer overflow in the envelope comments processing in
796: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 797: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 798: In ssl(8) an information leak can occur via timing by performing
799: a MAC computation even if incorrect block cipher padding has
800: been found, this is a countermeasure. Also, check for negative
801: sizes, in allocation routines.</a>
1.294 david 802: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 803: A double free exists in cvs(1) that could lead to privilege
804: escalation for cvs configurations where the cvs command is
1.294 david 805: run as a privileged user</a>.
806: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 807: A buffer overflow exists in named(8) that could lead to a
808: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 809: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 810: Incorrect argument checking in the getitimer(2) system call
811: may allow an attacker to crash the system.</a>
1.294 david 812: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 813: An attacker can bypass smrsh(8)'s restrictions and execute
814: arbitrary commands with the privileges of his own account.</a>
1.294 david 815: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 816: A buffer overflow can occur in the kadmind(8) daemon, leading
817: to possible remote crash or exploit.</a>
1.294 david 818: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 819: Incorrect argument checking in the setitimer(2) system call
820: may allow an attacker to write to kernel memory.</a>
1.294 david 821: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 822: An insufficient boundary check in the select system call
1.220 miod 823: allows an attacker to overwrite kernel memory and execute arbitrary code
824: in kernel context.</a>
1.294 david 825: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 826: Several remote buffer overflows can occur in the SSL2 server and SSL3
827: client of the ssl(8) library, as in the ASN.1 parser code in the
828: crypto(3) library, all of them being potentially remotely
829: exploitable.</a>
1.294 david 830: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 831: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
832: possible remote crash.</a>
1.294 david 833: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 834: A race condition exists in the pppd(8) daemon which may cause it to
835: alter the file permissions of an arbitrary file.</a>
1.294 david 836: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 837: Receiving IKE payloads out of sequence can cause isakmpd(8) to
838: crash.</a>
1.294 david 839: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 840: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 841: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 842: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 843: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 844: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 845: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 846: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 847: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 848: input validation error that can result in an integer overflow and
849: privilege escalation.</a>
1.294 david 850: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 851: A buffer overflow can occur during the interpretation of chunked
852: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 853: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 854: Under certain conditions, on systems using YP with netgroups
855: in the password database, it is possible that sshd(8) does
856: ACL checks for the requested user name but uses the password
857: database entry of a different user for authentication. This
858: means that denied users might authenticate successfully
859: while permitted users could be locked out.</a>
1.294 david 860: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 861: A race condition exists that could defeat the kernel's
862: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 863: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 864: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 865: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 866: A local user can gain super-user privileges due to a buffer
867: overflow in sshd(8) if AFS has been configured on the system
868: or if KerberosTgtPassing or AFSTokenPassing has been enabled
869: in the sshd_config file.</a>
1.203 deraadt 870: </ul>
871:
1.235 miod 872: <p>
1.203 deraadt 873: <li>
1.288 matthieu 874: <a name="30"></a>
1.187 deraadt 875:
1.294 david 876: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 877: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 878: in <a href="anoncvs.html">OpenBSD current</a>. The
879: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 880: you should update your machine.
1.187 deraadt 881:
882: <p>
883: <ul>
1.294 david 884: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 885: A buffer overflow exists in named(8) that could lead to a
886: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 887: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 888: Incorrect argument checking in the getitimer(2) system call
889: may allow an attacker to crash the system.</a>
1.294 david 890: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 891: An attacker can bypass smrsh(8)'s restrictions and execute
892: arbitrary commands with the privileges of his own account.</a>
1.294 david 893: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 894: A buffer overflow can occur in the kadmind(8) daemon, leading
895: to possible remote crash or exploit.</a>
1.294 david 896: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 897: Incorrect argument checking in the setitimer(2) system call
898: may allow an attacker to write to kernel memory.</a>
1.294 david 899: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 900: An insufficient boundary check in the select and poll system calls
901: allows an attacker to overwrite kernel memory and execute arbitrary code
902: in kernel context.</a>
1.294 david 903: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 904: Several remote buffer overflows can occur in the SSL2 server and SSL3
905: client of the ssl(8) library, as in the ASN.1 parser code in the
906: crypto(3) library, all of them being potentially remotely
907: exploitable.</a>
1.294 david 908: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 909: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
910: possible remote crash.</a>
1.294 david 911: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 912: A race condition exists in the pppd(8) daemon which may cause it to
913: alter the file permissions of an arbitrary file.</a>
1.294 david 914: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 915: Receiving IKE payloads out of sequence can cause isakmpd(8) to
916: crash.</a>
1.294 david 917: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 918: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 919: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 920: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 921: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 922: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 923: input validation error that can result in an integer overflow and
924: privilege escalation.</a>
1.294 david 925: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 926: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 927: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 928: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 929: A buffer overflow can occur during the interpretation of chunked
930: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 931: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 932: A race condition exists that could defeat the kernel's
933: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 934: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 935: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 936: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 937: A local user can gain super-user privileges due to a buffer
938: overflow in sshd(8) if AFS has been configured on the system
939: or if KerberosTgtPassing or AFSTokenPassing has been enabled
940: in the sshd_config file.</a>
1.294 david 941: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 942: The mail(1) was interpreting tilde escapes even when invoked
943: in non-interactive mode. As mail(1) is called as root from cron,
944: this can lead to a local root compromise.</a>
1.294 david 945: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 946: Under certain conditions, on systems using YP with netgroups in
947: the password database, it is possible for the rexecd(8) and rshd(8)
948: daemons to execute a shell from a password database entry for a
949: different user. Similarly, atrun(8) may change to the wrong
950: home directory when running jobs.</a>
1.294 david 951: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 952: A potential double free() exists in the zlib library;
953: this is not exploitable on OpenBSD.
954: The kernel also contains a copy of zlib; it is not
955: currently known if the kernel zlib is exploitable.</a>
1.294 david 956: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 957: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 958: may allow a local user to gain super-user privileges.</a>
1.294 david 959: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 960: A race condition between the ptrace(2) and execve(2) system calls
961: allows an attacker to modify the memory contents of suid/sgid
962: processes which could lead to compromise of the super-user account.</a>
1.294 david 963: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 964: There is a security hole in sudo(8) that can be exploited
965: when the Postfix sendmail replacement is installed that may
966: allow an attacker on the local host to gain root privileges.</a>
1.294 david 967: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 968: An attacker can trick a machine running the lpd daemon into
969: creating new files in the root directory from a machine with
970: remote line printer access.</a>
1.294 david 971: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 972: The vi.recover script can be abused in such a way as
973: to cause arbitrary zero-length files to be removed.</a>
1.294 david 974: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 975: pf(4) was incapable of dealing with certain ipv6 icmp packets,
976: resulting in a crash.</a>
1.294 david 977: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 978: A security hole that may allow an attacker to partially authenticate
979: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 980: </ul>
981:
982: <p>
983: <li>
1.288 matthieu 984: <a name="29"></a>
1.173 deraadt 985:
1.294 david 986: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 987: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 988: in <a href="anoncvs.html">OpenBSD current</a>. The
989: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 990: you should update your machine.
991:
1.173 deraadt 992:
993: <p>
994: <ul>
1.294 david 995: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 996: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 997: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 998: A race condition exists that could defeat the kernel's
999: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1000: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1001: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1002: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1003: A local user can gain super-user privileges due to a buffer
1004: overflow in sshd(8) if AFS has been configured on the system
1005: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1006: in the sshd_config file.</a>
1.294 david 1007: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1008: The mail(1) was interpreting tilde escapes even when invoked
1009: in non-interactive mode. As mail(1) is called as root from cron,
1010: this can lead to a local root compromise.</a>
1.294 david 1011: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1012: A potential double free() exists in the zlib library;
1013: this is not exploitable on OpenBSD.
1014: The kernel also contains a copy of zlib; it is not
1015: currently known if the kernel zlib is exploitable.</a>
1.294 david 1016: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1017: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1018: may allow a local user to gain super-user privileges.</a>
1.294 david 1019: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1020: A race condition between the ptrace(2) and execve(2) system calls
1021: allows an attacker to modify the memory contents of suid/sgid
1022: processes which could lead to compromise of the super-user account.</a>
1.294 david 1023: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1024: There is a security hole in sudo(8) that can be exploited
1025: when the Postfix sendmail replacement is installed that may
1026: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1027: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1028: An attacker can trick a machine running the lpd daemon into
1029: creating new files in the root directory from a machine with
1030: remote line printer access.</a>
1.294 david 1031: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1032: The vi.recover script can be abused in such a way as
1033: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1034: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1035: A security hole exists in uuxqt(8) that may allow an
1036: attacker to gain root privileges.</a>
1.294 david 1037: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1038: A security hole exists in lpd(8) that may allow an
1039: attacker to gain root privileges if lpd is running.</a>
1.294 david 1040: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1041: A security hole exists in sendmail(8) that may allow an
1042: attacker on the local host to gain root privileges.</a>
1.294 david 1043: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1044: A kernel buffer overflow in the NFS code can be used to execute
1045: arbitrary code by users with mount privileges (only root by
1.181 millert 1046: default).</a>
1.294 david 1047: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1048: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1049: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1050: sshd(8) allows users to delete arbitrary files named "cookies"
1051: if X11 forwarding is enabled. X11 forwarding is disabled
1052: by default.</a>
1.294 david 1053: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1054: Programs using the fts routines can be tricked into changing
1055: into the wrong directory.</a>
1.294 david 1056: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1057: Sendmail signal handlers contain unsafe code,
1058: leading to numerous race conditions.</a>
1.173 deraadt 1059: </ul>
1060:
1061: <p>
1062: <li>
1.288 matthieu 1063: <a name="28"></a>
1.152 deraadt 1064:
1.294 david 1065: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1066: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1067: in <a href="anoncvs.html">OpenBSD current</a>. The
1068: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1069: you should update your machine.
1070:
1.152 deraadt 1071:
1072: <p>
1073: <ul>
1.294 david 1074: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1075: A security hole exists in uuxqt(8) that may allow an
1076: attacker to gain root privileges.</a>
1.294 david 1077: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1078: A security hole exists in lpd(8) that may allow an
1079: attacker to gain root privileges if lpd is running.</a>
1.294 david 1080: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1081: A security hole exists in sendmail(8) that may allow an
1082: attacker on the local host to gain root privileges.</a>
1.294 david 1083: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1084: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1085: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1086: Programs using the fts routines can be tricked into changing
1087: into the wrong directory.</a>
1.294 david 1088: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1089: Sendmail signal handlers contain unsafe code,
1090: leading to numerous race conditions.</a>
1.294 david 1091: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1092: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1093: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1094: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1095: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1096: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1097: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1098: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1099: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1100: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1101: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1102: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1103: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1104: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1105: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1106: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1107: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1108: rnd(4) did not use all of its input when written to.</a>
1.294 david 1109: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1110: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1111: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1112: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1113: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1114: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1115: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1116: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1117: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1118: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1119: </ul>
1120:
1121: <p>
1122: <li>
1.288 matthieu 1123: <a name="27"></a>
1.124 deraadt 1124:
1.294 david 1125: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1126: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1127: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1128: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1129:
1130: <p>
1131: <ul>
1.294 david 1132: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1133: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1134: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1135: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1136: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1137: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1138: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1139: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1140: (patch included)</a>
1.294 david 1141: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1142: X11 libraries have 2 potential overflows in xtrans code.
1143: (patch included)</a>
1.294 david 1144: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1145: Apache mod_rewrite and mod_vhost_alias modules could expose files
1146: on the server in certain configurations if used.
1147: (patch included)</a>
1.294 david 1148: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1149: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1150: TERMPATH and TERMCAP environment variables as it should.
1151: (patch included)</a>
1.294 david 1152: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1153: There are printf-style format string bugs in several privileged
1154: programs. (patch included)</a>
1.294 david 1155: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1156: libcurses honored terminal descriptions in the $HOME/.terminfo
1157: directory as well as in the TERMCAP environment variable for
1158: setuid and setgid applications.
1.146 deraadt 1159: (patch included)</a>
1.294 david 1160: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1161: A format string vulnerability exists in talkd(8).
1162: (patch included)</a>
1.294 david 1163: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1164: A format string vulnerability exists in the pw_error() function of the
1165: libutil library, yielding localhost root through chpass(1).
1166: (patch included)</a>
1.294 david 1167: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1168: Bad ESP/AH packets could cause a crash under certain conditions.
1169: (patch included)</a>
1.294 david 1170: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1171: A format string vulnerability (localhost root) exists in xlock(1).
1172: (patch included)</a>
1.294 david 1173: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1174: Various bugs found in X11 libraries have various side effects, almost
1175: completely denial of service in OpenBSD.
1176: (patch included)</a>
1.294 david 1177: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1178: Just like pretty much all the other unix ftp daemons
1179: on the planet, ftpd had a remote root hole in it.
1180: Luckily, ftpd was not enabled by default.
1.137 deraadt 1181: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1182: (patch included)</a>
1.294 david 1183: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1184: Mopd, very rarely used, contained some buffer overflows.
1185: (patch included)</a>
1.294 david 1186: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1187: libedit would check for a <b>.editrc</b> file in the current
1188: directory. Not known to be a real security issue, but a patch
1189: is available anyways.
1190: (patch included)</a>
1.294 david 1191: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1192: A serious bug in dhclient(8) could allow strings from a
1193: malicious dhcp server to be executed in the shell as root.
1194: (patch included)</a>
1.294 david 1195: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1196: A serious bug in isakmpd(8) policy handling wherein
1197: policy verification could be completely bypassed in isakmpd.
1198: (patch included)</a>
1.294 david 1199: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1200: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1201: should not be used, and results in security problems on
1202: other operating systems.</a>
1.294 david 1203: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1204: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1205: (patch included)</a>
1.294 david 1206: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1207: Improper use of ipf <i>keep-state</i> rules can result
1208: in firewall rules being bypassed. (patch included)</a>
1209:
1.124 deraadt 1210: </ul>
1211:
1212: <p>
1213: <li>
1.288 matthieu 1214: <a name="26"></a>
1.119 deraadt 1215:
1.294 david 1216: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1217: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1218: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1219: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1220:
1221: <p>
1222: <ul>
1.294 david 1223: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1224: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1225: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1226: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1227: Improper use of ipf <i>keep-state</i> rules can result
1228: in firewall rules being bypassed. (patch included)</a>
1.294 david 1229: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1230: xlockmore has a bug which a localhost attacker can use to gain
1231: access to the encrypted root password hash (which is normally
1.245 miod 1232: encoded using blowfish</a> (see
1.294 david 1233: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1234: crypt(3)</a>)
1.245 miod 1235: (patch included).
1.294 david 1236: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1237: Systems running with procfs enabled and mounted are
1238: vulnerable to a very tricky exploit. procfs is not
1239: mounted by default.
1240: (patch included).</a>
1.294 david 1241: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1242: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1243: thus exposing the system to a race where the aliases file
1244: did not exist.
1.119 deraadt 1245: (patch included).</a>
1.294 david 1246: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1247: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1248: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1249: A buffer overflow in the RSAREF code included in the
1250: USA version of libssl, is possibly exploitable in
1251: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1252: (patch included).<br></a>
1253: <strong>Update:</strong> Turns out that this was not exploitable
1254: in any of the software included in OpenBSD 2.6.
1.294 david 1255: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1256: Any user could change interface media configurations, resulting in
1257: a localhost denial of service attack.
1.121 deraadt 1258: (patch included).</a>
1.119 deraadt 1259: </ul>
1260:
1261: <p>
1262: <li>
1.288 matthieu 1263: <a name="25"></a>
1.106 deraadt 1264:
1.294 david 1265: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1266: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1267: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1268: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1269:
1.96 deraadt 1270: <p>
1.104 deraadt 1271: <ul>
1.294 david 1272: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1273: In cron(8), make sure argv[] is NULL terminated in the
1274: fake popen() and run sendmail as the user, not as root.
1275: (patch included).</a>
1.294 david 1276: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1277: filesystems had an overrun in their handling of uio_offset
1278: in their readdir() routines. (These filesystems are not
1279: enabled by default). (patch included).</a>
1.294 david 1280: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1281: when we execve() a new process. (patch included).</a>
1.294 david 1282: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1283: been handled by IPsec may be transmitted as cleartext.
1284: PF_KEY SA expirations may leak kernel resources.
1285: (patch included).</a>
1.294 david 1286: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1287: motd re-writing and change the find(1) to use -execdir
1288: (patch included).</a>
1.294 david 1289: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1290: users to chflags(2) or fchflags(2) on character or block devices
1291: which they may currently be the owner of (patch included).</a>
1.294 david 1292: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1293: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1294: </ul>
1295:
1.106 deraadt 1296: <p>
1297: <li>
1.288 matthieu 1298: <a name="24"></a>
1.235 miod 1299:
1.294 david 1300: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1301: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1302: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1303: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1304:
1.96 deraadt 1305: <p>
1.75 deraadt 1306: <ul>
1.294 david 1307: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1308: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1309: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1310: another kernel crash case caused by the <strong>crashme</strong>
1311: program (patch included).</a>
1.294 david 1312: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1313: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1314: (patch included).</a>
1.294 david 1315: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1316: existed in ping(8). (patch included).</a>
1.294 david 1317: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1318: the ipq, which could permit an attacker to cause a crash.
1319: (patch included).</a>
1.294 david 1320: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1321: kernel between accept(2) and select(2) could permit an attacker
1322: to hang sockets from remote.
1323: (patch included).</a>
1.294 david 1324: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1325: bog the machine excessively and cause problems.
1326: (patch included).</a>
1.294 david 1327: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1328: DDB interacted to possibly cause a crash.
1329: (patch included).</a>
1.294 david 1330: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1331: (patch included).</a>
1.294 david 1332: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1333: problem in bootpd(8). (patch included).</a>
1.294 david 1334: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1335: exploitable problem relating to environment variables in termcap
1336: and curses. (patch included).</a>
1.294 david 1337: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1338: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1339: </ul>
1340:
1.106 deraadt 1341: <p>
1342: <li>
1.288 matthieu 1343: <a name="23"></a>
1.235 miod 1344:
1.294 david 1345: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1346: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1347: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1348: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1349:
1.96 deraadt 1350: <p>
1.53 matthieu 1351: <ul>
1.294 david 1352: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1353: problem in bootpd(8). (patch included).</a>
1.294 david 1354: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1355: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1356: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1357: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1358: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1359: chpass(1) has a file descriptor leak which allows an
1360: attacker to modify /etc/master.passwd.</a>
1.294 david 1361: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1362: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1363: should not be executed with fd slots 0, 1, or 2 free.
1364: (patch included).</a>
1.294 david 1365: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1366: libraries (patches included).</a>
1.294 david 1367: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1368: processes too permissive (4th revision patch included).</a>
1.294 david 1369: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1370: of immutable and append-only file flags. (patch included).</a>
1.294 david 1371: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1372: if IPSEC is enabled (patch included).</a>
1.294 david 1373: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1374: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1375: </ul>
1.9 deraadt 1376:
1.106 deraadt 1377: <p>
1378: <li>
1.288 matthieu 1379: <a name="22"></a>
1.235 miod 1380:
1.294 david 1381: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1382: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1383: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1384: still exist in other operating systems. (The supplied patches are for
1385: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1386:
1.96 deraadt 1387: <p>
1.9 deraadt 1388: <ul>
1.294 david 1389: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1390: packets if IPSEC is enabled (patch included).</a>
1.294 david 1391: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1392: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1393: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1394: (patch included).</a>
1.294 david 1395: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1396: (patch included).</a>
1.294 david 1397: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1398: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1399: (patch included).</a>
1.294 david 1400: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1401: export (patch included).</a>
1.112 philen 1402: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1403: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1404: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1405: Acceptance.</a>
1.294 david 1406: A patch is available <a href="errata22.html#sourceroute">here</a>.
1407: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1408: flaw (patch included).</a>
1.294 david 1409: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1410: </ul>
1411:
1.106 deraadt 1412: <p>
1413: <li>
1.288 matthieu 1414: <a name="21"></a>
1.235 miod 1415:
1.294 david 1416: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1417: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1418: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1419: exist in other operating systems. (If you are running OpenBSD 2.1, we
1420: would strongly recommend an upgrade to the newest release, as this
1421: patch list only attempts at fixing the most important security
1422: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1423: security problems. Many of those problems were solved in ways which
1424: make it hard for us to provide patches).
1425:
1.96 deraadt 1426: <p>
1.52 deraadt 1427: <ul>
1.112 philen 1428: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1429: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1430: (patch included)</a>
1.112 philen 1431: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1432: </ul>
1.51 deraadt 1433:
1.106 deraadt 1434: <p>
1435: <li>
1.288 matthieu 1436: <a name="20"></a>
1.235 miod 1437:
1.294 david 1438: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1439: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1440: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1441: exist in other operating systems. (If you are running OpenBSD 2.0, we
1442: commend you for being there back in the old days!, but you're really
1443: missing out if you don't install a new version!)
1444:
1445: <p>
1446: <ul>
1.112 philen 1447: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1448: resolver (patch included)</a>
1449: <li>Many others... if people can hunt them down, please let me know
1450: and we'll put them up here.
1451: </ul>
1.51 deraadt 1452: <p>
1.106 deraadt 1453:
1.288 matthieu 1454: <a name="watching"></a>
1.294 david 1455: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1456:
1.21 deraadt 1457: Since we take a proactive stance with security, we are continually
1458: finding and fixing new security problems. Not all of these problems
1.80 espie 1459: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1460: confirmed to be exploitable; many simple bugs we fix do turn out to
1461: have security consequences we could not predict. We do not have the
1462: time resources to make these changes available in the above format.<p>
1.21 deraadt 1463:
1464: Thus there are usually minor security fixes in the current source code
1465: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1466: guarantee that these problems are of minimal impact and unproven
1.44 ian 1467: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1468: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1469:
1.45 deraadt 1470: People who are really concerned with security can do a number of
1471: things:<p>
1.21 deraadt 1472:
1473: <ul>
1474: <li>If you understand security issues, watch our
1.294 david 1475: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1476: eye out for things which appear security related. Since
1.21 deraadt 1477: exploitability is not proven for many of the fixes we make,
1478: do not expect the relevant commit message to say "SECURITY FIX!".
1479: If a problem is proven and serious, a patch will be available
1480: here very shortly after.
1.161 horacio 1481: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1482: security-announce mailing list</a> which will notify you for every
1.186 ian 1483: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1484: and instruct you on how to patch the problem.
1.21 deraadt 1485: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1486: complete system build from time to time (read /usr/src/Makefile
1487: carefully). Users can make the assumption that the current
1488: source tree always has stronger security than the previous release.
1.45 deraadt 1489: However, building your own system from source code is not trivial;
1.265 miod 1490: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1491: transition between major releases.
1.115 ericj 1492: <li>Install a binary snapshot for your
1.80 espie 1493: architecture, which are made available fairly often. For
1.29 deraadt 1494: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1495: </ul>
1496:
1.9 deraadt 1497: <p>
1.288 matthieu 1498: <a name="reporting"></a>
1.294 david 1499: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1500:
1.5 deraadt 1501: <p> If you find a new security problem, you can mail it to
1.294 david 1502: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1503: <br>
1.5 deraadt 1504: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1505: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1506:
1.107 deraadt 1507: <p>
1.288 matthieu 1508: <a name="papers"></a>
1.294 david 1509: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1510:
1511: A number of papers have been written by OpenBSD team members, about security
1512: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1513: documents are available as follows.<p>
1.107 deraadt 1514:
1515: <ul>
1.113 deraadt 1516: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1517: <a href="events.html#usenix99">Usenix 1999</a>,
1518: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1519: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1520: <a href="papers/bcrypt-paper.ps">paper</a> and
1521: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1522: <p>
1523: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1524: <a href="events.html#usenix99">Usenix 1999</a>,
1525: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1526: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1527: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1528: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1529: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1530: <a href="papers/crypt-paper.ps">paper</a> and
1531: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1532: <p>
1533: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1534: <a href="events.html#usenix99">Usenix 1999</a>,
1535: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1536: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1537: <a href="papers/strlcpy-paper.ps">paper</a> and
1538: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1539: <p>
1.118 deraadt 1540: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1541: <a href="events.html#lisa99">LISA 1999</a>,
1542: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1543: <a href="papers/authgw-paper.ps">paper</a> and
1544: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1545: <p>
1.153 jufi 1546: <li>Encrypting Virtual Memory<br>
1.294 david 1547: <a href="events.html#sec2000">Usenix Security 2000</a>,
1548: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1549: <a href="papers/swapencrypt.ps">paper</a> and
1550: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1551: <p>
1.107 deraadt 1552: </ul>
1.294 david 1553: </ul>
1.106 deraadt 1554:
1.2 deraadt 1555: <hr>
1.294 david 1556: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1557: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1558: <br>
1.343 ! deraadt 1559: <small>$OpenBSD: security.html,v 1.342 2007/04/04 14:17:02 mbalmer Exp $</small>
1.1 deraadt 1560:
1.24 deraadt 1561: </body>
1562: </html>
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