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