Annotation of www/security.html, Revision 1.323
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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>
1.322 brad 235: <li><a href="errata.html#xorg">May 2, 2006:
236: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 237: <li><a href="errata.html#sendmail">Mar 25, 2006:
238: A race condition has been reported to exist in the handling by sendmail
239: of asynchronous signals.</a>
240: </ul>
241:
242: <li>
1.318 deraadt 243: <a name="38"></a>
244:
245: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
246: These are the OpenBSD 3.8 advisories -- all these problems are solved
247: in <a href=anoncvs.html>OpenBSD current</a> and the
248: <a href=stable.html>patch branch</a>.
249:
250: <p>
251: <ul>
1.322 brad 252: <li><a href="errata38.html#xorg">May 2, 2006:
253: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 254: <li><a href="errata38.html#sendmail">Mar 25, 2006:
255: A race condition has been reported to exist in the handling by sendmail
256: of asynchronous signals.</a>
257: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 258: Josh Bressers has reported a weakness in OpenSSH caused due to the
259: insecure use of the system(3) function in scp(1) when performing copy
260: operations using filenames that are supplied by the user from the
261: command line.</a>
1.321 brad 262: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 263: Do not allow users to trick suid programs into re-opening files via
264: /dev/fd.</a>
1.321 brad 265: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 266: A buffer overflow has been found in the Perl interpreter with the
267: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 268: </ul>
269:
1.323 ! steven 270: <p>
! 271: OpenBSD 3.7 and earlier releases are not supported anymore. The following
! 272: paragraphs only list advisories issued while they were maintained; these
! 273: releases are likely to be affected by the advisories for more recent releases.
! 274: <br>
! 275:
1.318 deraadt 276: <li>
1.312 david 277: <a name="37"></a>
278:
279: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
280: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 ! steven 281: in <a href="anoncvs.html">OpenBSD current</a>. The
! 282: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
! 283: you should update your machine.
1.312 david 284:
285: <p>
286: <ul>
1.322 brad 287: <li><a href="errata37.html#xorg">May 2, 2006:
288: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 289: <li><a href="errata37.html#sendmail">Mar 25, 2006:
290: A race condition has been reported to exist in the handling by sendmail
291: of asynchronous signals.</a>
1.320 brad 292: <li><a href="errata37.html#ssh">Feb 12, 2006:
293: Josh Bressers has reported a weakness in OpenSSH caused due to the
294: insecure use of the system(3) function in scp(1) when performing copy
295: operations using filenames that are supplied by the user from the
296: command line.</a>
1.319 brad 297: <li><a href="errata37.html#fd">Jan 5, 2006:
298: Do not allow users to trick suid programs into re-opening files via
299: /dev/fd.</a>
300: <li><a href="errata37.html#perl">Jan 5, 2006:
301: A buffer overflow has been found in the Perl interpreter with the
302: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 303: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 304: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 305: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 306: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 307: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 308: Fix a race condition in sudo(8) that could allow a user
1.315 millert 309: to run arbitrary commands.</a>
1.318 deraadt 310: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 311: Fix a buffer overflow, memory leaks, and NULL pointer
312: dereference in cvs(1).</a>
1.312 david 313: </ul>
314:
315: <li>
1.301 miod 316: <a name="36"></a>
317:
318: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
319: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 ! steven 320: in <a href="anoncvs.html">OpenBSD current</a>. The
! 321: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
! 322: you should update your machine.
1.301 miod 323:
324: <p>
1.302 markus 325: <ul>
1.317 millert 326: <li><a href="errata36.html#libz2">Jul 21, 2005:
327: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 328: <li><a href="errata36.html#libz">Jul 6, 2005:
329: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 330: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 331: Fix a race condition in sudo(8) that could allow a user
1.315 millert 332: to run arbitrary commands.</a>
1.311 deraadt 333: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 334: Fix a buffer overflow, memory leaks, and NULL pointer
335: dereference in cvs(1).</a>
1.311 deraadt 336: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 337: Due to buffer overflows in telnet(1), a malicious
338: server or man-in-the-middle attack could allow
339: execution of arbitrary code with the privileges of
340: the user invoking telnet(1).</a>
1.311 deraadt 341: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 342: More stringent checking should be done in the copy(9)
343: functions to prevent their misuse.</a>
1.311 deraadt 344: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 345: More stringent checking should be done in the copy(9)
346: functions to prevent their misuse.</a>
1.311 deraadt 347: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 348: httpd(8)'s mod_include module fails to properly validate
349: the length of user supplied tag strings prior to copying
1.305 brad 350: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 351: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 352: On systems running isakmpd(8) it is possible for a local
353: user to cause kernel memory corruption and system panic by
1.303 markus 354: setting ipsec(4) credentials on a socket.</a>
1.302 markus 355: </ul>
1.301 miod 356:
357: <li>
1.288 matthieu 358: <a name="35"></a>
1.279 deraadt 359:
1.294 david 360: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 361: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 362: in <a href="anoncvs.html">OpenBSD current</a>. The
363: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
364: you should update your machine.
1.279 deraadt 365:
366: <p>
367: <ul>
1.310 brad 368: <li><a href="errata35.html#cvs4">Apr 28, 2005:
369: Fix a buffer overflow, memory leaks, and NULL pointer
370: dereference in cvs(1).</a>
1.309 brad 371: <li><a href="errata35.html#telnet">Mar 30, 2005:
372: Due to buffer overflows in telnet(1), a malicious
373: server or man-in-the-middle attack could allow
374: execution of arbitrary code with the privileges of
375: the user invoking telnet(1).</a>
1.308 brad 376: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 377: More stringent checking should be done in the copy(9)
378: functions to prevent their misuse.</a>
1.306 brad 379: <li><a href="errata35.html#locore">Feb 28, 2005:
380: More stringent checking should be done in the copy(9)
381: functions to prevent their misuse.</a>
1.304 brad 382: <li><a href="errata35.html#httpd3">Jan 12, 2005:
383: httpd(8)'s mod_include module fails to properly validate
384: the length of user supplied tag strings prior to copying
1.305 brad 385: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 386: <li><a href="errata35.html#pfkey">Dec 14, 2004:
387: On systems running isakmpd(8) it is possible for a local
388: user to cause kernel memory corruption and system panic by
1.303 markus 389: setting ipsec(4) credentials on a socket.</a>
1.301 miod 390: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 391: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 392: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 393: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 394: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 395: httpd(8)'s mod_rewrite module can be made to write one zero byte in
396: an arbitrary memory position outside of a char array, causing a DoS
397: or possibly buffer overflows.</a>
1.301 miod 398: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 399: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 400: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 401: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 402: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 403: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 404: Multiple remote vulnerabilities have been found in the cvs(1)
405: server which can be used by CVS clients to crash or execute
1.293 brad 406: arbitrary code on the server.</a>
1.301 miod 407: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 408: kdc(8) performs inadequate checking of request fields, leading
409: to the possibility of principal impersonation from other
410: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 411: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 412: xdm(1) ignores the requestPort resource and creates a
1.293 brad 413: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 414: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 415: A buffer overflow in the cvs(1) server has been found,
416: which can be used by CVS clients to execute arbitrary code on
1.293 brad 417: the server.</a>
1.301 miod 418: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 419: Integer overflow problems were found in procfs, allowing
1.293 brad 420: reading of arbitrary kernel memory.</a>
1.301 miod 421: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 422: Pathname validation problems have been found in cvs(1),
423: allowing clients and servers access to files outside the
1.293 brad 424: repository or local CVS tree.</a>
1.279 deraadt 425: </ul>
426:
427: <p>
428: <li>
1.288 matthieu 429: <a name="34"></a>
1.261 david 430:
1.294 david 431: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 432: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 433: in <a href="anoncvs.html">OpenBSD current</a>. The
434: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
435: you should update your machine.
1.261 david 436: <p>
437: <ul>
1.302 markus 438: <li><a href="errata34.html#pfkey">Dec 14, 2004:
439: On systems running isakmpd(8) it is possible for a local
440: user to cause kernel memory corruption and system panic by
1.303 markus 441: setting ipsec(4) credentials on a socket.</a>
1.298 brad 442: <li><a href="errata34.html#xpm">Sep 16, 2004:
443: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 444: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
445: httpd(8)'s mod_rewrite module can be made to write one zero byte in
446: an arbitrary memory position outside of a char array, causing a DoS
447: or possibly buffer overflows.</a>
1.294 david 448: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 449: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 450: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 451: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 452: an attacker can delete IPsec tunnels at will.</a>
1.294 david 453: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 454: Multiple remote vulnerabilities have been found in the cvs(1)
455: server which can be used by CVS clients to crash or execute
1.293 brad 456: arbitrary code on the server.</a>
1.294 david 457: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 458: kdc(8) performs inadequate checking of request fields, leading
459: to the possibility of principal impersonation from other
460: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 461: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 462: A buffer overflow in the cvs(1) server has been found,
463: which can be used by CVS clients to execute arbitrary code on
464: the server.</a>
1.294 david 465: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 466: Integer overflow problems were found in procfs, allowing
467: reading of arbitrary kernel memory.</a>
1.294 david 468: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 469: Pathname validation problems have been found in cvs(1),
470: allowing clients and servers access to files outside the
471: repository or local CVS tree.</a>
1.294 david 472: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 473: A missing check for a NULL-pointer dereference may allow a
1.281 otto 474: remote attacker to crash applications using OpenSSL.</a>
1.294 david 475: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 476: Defects in the payload validation and processing functions of
477: isakmpd have been discovered. An attacker could send malformed
478: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 479: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 480: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
481: access module, using IP addresses without a netmask on big endian
482: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 483: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 484: An IPv6 MTU handling problem exists that could be used by an
485: attacker to cause a denial of service attack.</a>
1.294 david 486: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 487: A reference counting bug in shmat(2) could be used to write to
488: kernel memory under certain circumstances.</a>
1.294 david 489: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 490: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 491: by Thomas Walpuski.</a>
1.294 david 492: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 493: It may be possible for a local user to overrun the stack in
494: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 495: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 496: The use of certain ASN.1 encodings or malformed public keys may
497: allow an attacker to mount a denial of service attack against
498: applications linked with ssl(3).</a>
1.261 david 499: </ul>
500:
501: <li>
1.288 matthieu 502: <a name="33"></a>
1.246 deraadt 503:
1.294 david 504: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 505: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 506: in <a href="anoncvs.html">OpenBSD current</a>. The
507: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 508: you should update your machine.
1.246 deraadt 509: <p>
510: <ul>
1.294 david 511: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 512: Pathname validation problems have been found in cvs(1),
513: allowing clients and servers access to files outside the
514: repository or local CVS tree.</a>
1.294 david 515: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 516: A missing check for a NULL-pointer dereference may allow a
1.281 otto 517: remote attacker to crash applications using OpenSSL.</a>
1.294 david 518: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 519: Defects in the payload validation and processing functions of
520: isakmpd have been discovered. An attacker could send malformed
521: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 522: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 523: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
524: access module, using IP addresses without a netmask on big endian
525: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 526: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 527: An IPv6 MTU handling problem exists that could be used by an
528: attacker to cause a denial of service attack.</a>
1.294 david 529: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 530: A reference counting bug in shmat(2) could be used to write to
531: kernel memory under certain circumstances.</a>
1.294 david 532: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 533: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 534: by Thomas Walpuski.</a>
1.294 david 535: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 536: It may be possible for a local user to execute arbitrary code
537: resulting in escalation of privileges due to a stack overrun
538: in compat_ibcs2(8).</a>
1.294 david 539: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 540: The use of certain ASN.1 encodings or malformed public keys may
541: allow an attacker to mount a denial of service attack against
542: applications linked with ssl(3).</a>
1.294 david 543: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 544: Access of freed memory in pf(4) could be used to
1.260 margarid 545: remotely panic a machine using scrub rules.</a>
1.294 david 546: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 547: A buffer overflow in the address parsing in
548: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 549: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 550: OpenSSH versions prior to 3.7 contains a buffer management error
551: that is potentially exploitable.</a>
1.294 david 552: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 553: Root may be able to reduce the security level by taking advantage of
554: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 555: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 556: An improper bounds check in the kernel may allow a local user
557: to panic the kernel.</a>
1.294 david 558: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 559: An off-by-one error exists in the C library function realpath(3)
560: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 561: </ul>
562:
1.265 miod 563:
1.247 david 564: <p>
1.246 deraadt 565: <li>
1.288 matthieu 566: <a name="32"></a>
1.224 deraadt 567:
1.294 david 568: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 569: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 570: in <a href="anoncvs.html">OpenBSD current</a>. The
571: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 572: you should update your machine.
1.224 deraadt 573: <p>
574: <ul>
1.294 david 575: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 576: The use of certain ASN.1 encodings or malformed public keys may
577: allow an attacker to mount a denial of service attack against
578: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 579: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 580: Access of freed memory in pf(4) could be used to
1.260 margarid 581: remotely panic a machine using scrub rules.</a>
1.294 david 582: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 583: A buffer overflow in the address parsing in
584: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 585: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 586: OpenSSH versions prior to 3.7 contains a buffer management error
587: that is potentially exploitable.</a>
1.294 david 588: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 589: Fix for a potential security issue in
590: sendmail(8) with respect to DNS maps.</a>
1.294 david 591: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 592: An off-by-one error exists in the C library function realpath(3)
593: may allow an attacker to gain escalated privileges.</a>
1.294 david 594: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 595: A buffer overflow in the address parsing in
596: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 597: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 598: A cryptographic weaknesses in the Kerberos v4 protocol can be
599: exploited on Kerberos v5 as well.</a>
1.294 david 600: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 601: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 602: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 603: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 604: Various SSL and TLS operations in OpenSSL are vulnerable to
605: timing attacks.</a>
1.294 david 606: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 607: A buffer overflow in lprm(1) may allow an attacker to elevate
608: privileges to user daemon.</a>.
1.294 david 609: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 610: A buffer overflow in the envelope comments processing in
611: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 612: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 613: httpd(8) leaks file inode numbers via ETag header as well as
614: child PIDs in multipart MIME boundary generation. This could
615: lead, for example, to NFS exploitation because it uses inode
616: numbers as part of the file handle.</a>
1.294 david 617: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 618: In ssl(8) an information leak can occur via timing by performing
619: a MAC computation even if incorrect block cipher padding has
620: been found, this is a countermeasure. Also, check for negative
621: sizes, in allocation routines.</a>
1.294 david 622: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 623: A double free exists in cvs(1) that could lead to privilege
624: escalation for cvs configurations where the cvs command is
1.233 margarid 625: run as a privileged user.</a>
1.294 david 626: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 627: A buffer overflow exists in named(8) that could lead to a
628: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 629: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 630: A logic error in the pool kernel memory allocator could cause
631: memory corruption in low-memory situations, causing the system
632: to crash.</a>
1.294 david 633: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 634: An attacker can bypass smrsh(8)'s restrictions and execute
635: arbitrary commands with the privileges of his own account.</a>
1.294 david 636: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 637: Network bridges running pf with scrubbing enabled could cause
638: mbuf corruption, causing the system to crash.</a>
1.294 david 639: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 640: A buffer overflow can occur in the kadmind(8) daemon, leading
641: to possible remote crash or exploit.</a>
1.224 deraadt 642: </ul>
643:
1.227 miod 644: <p>
645: <li>
1.288 matthieu 646: <a name="31"></a>
1.203 deraadt 647:
1.294 david 648: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 649: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 650: in <a href="anoncvs.html">OpenBSD current</a>. The
651: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 652: you should update your machine.
1.203 deraadt 653:
654: <p>
655: <ul>
1.294 david 656: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 657: A buffer overflow in the address parsing in
658: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 659: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 660: A cryptographic weaknesses in the Kerberos v4 protocol can be
661: exploited on Kerberos v5 as well.</a>
1.294 david 662: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 663: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 664: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 665: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 666: Various SSL and TLS operations in OpenSSL are vulnerable to
667: timing attacks.</a>
1.294 david 668: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 669: A buffer overflow in lprm(1) may allow an attacker to gain
670: root privileges.</a>
1.294 david 671: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 672: A buffer overflow in the envelope comments processing in
673: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 674: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 675: In ssl(8) an information leak can occur via timing by performing
676: a MAC computation even if incorrect block cipher padding has
677: been found, this is a countermeasure. Also, check for negative
678: sizes, in allocation routines.</a>
1.294 david 679: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 680: A double free exists in cvs(1) that could lead to privilege
681: escalation for cvs configurations where the cvs command is
1.294 david 682: run as a privileged user</a>.
683: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 684: A buffer overflow exists in named(8) that could lead to a
685: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 686: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 687: Incorrect argument checking in the getitimer(2) system call
688: may allow an attacker to crash the system.</a>
1.294 david 689: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 690: An attacker can bypass smrsh(8)'s restrictions and execute
691: arbitrary commands with the privileges of his own account.</a>
1.294 david 692: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 693: A buffer overflow can occur in the kadmind(8) daemon, leading
694: to possible remote crash or exploit.</a>
1.294 david 695: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 696: Incorrect argument checking in the setitimer(2) system call
697: may allow an attacker to write to kernel memory.</a>
1.294 david 698: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 699: An insufficient boundary check in the select system call
1.220 miod 700: allows an attacker to overwrite kernel memory and execute arbitrary code
701: in kernel context.</a>
1.294 david 702: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 703: Several remote buffer overflows can occur in the SSL2 server and SSL3
704: client of the ssl(8) library, as in the ASN.1 parser code in the
705: crypto(3) library, all of them being potentially remotely
706: exploitable.</a>
1.294 david 707: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 708: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
709: possible remote crash.</a>
1.294 david 710: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 711: A race condition exists in the pppd(8) daemon which may cause it to
712: alter the file permissions of an arbitrary file.</a>
1.294 david 713: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 714: Receiving IKE payloads out of sequence can cause isakmpd(8) to
715: crash.</a>
1.294 david 716: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 717: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 718: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 719: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 720: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 721: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 722: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 723: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 724: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 725: input validation error that can result in an integer overflow and
726: privilege escalation.</a>
1.294 david 727: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 728: A buffer overflow can occur during the interpretation of chunked
729: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 730: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 731: Under certain conditions, on systems using YP with netgroups
732: in the password database, it is possible that sshd(8) does
733: ACL checks for the requested user name but uses the password
734: database entry of a different user for authentication. This
735: means that denied users might authenticate successfully
736: while permitted users could be locked out.</a>
1.294 david 737: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 738: A race condition exists that could defeat the kernel's
739: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 740: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 741: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 742: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 743: A local user can gain super-user privileges due to a buffer
744: overflow in sshd(8) if AFS has been configured on the system
745: or if KerberosTgtPassing or AFSTokenPassing has been enabled
746: in the sshd_config file.</a>
1.203 deraadt 747: </ul>
748:
1.235 miod 749: <p>
1.203 deraadt 750: <li>
1.288 matthieu 751: <a name="30"></a>
1.187 deraadt 752:
1.294 david 753: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 754: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 755: in <a href="anoncvs.html">OpenBSD current</a>. The
756: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 757: you should update your machine.
1.187 deraadt 758:
759: <p>
760: <ul>
1.294 david 761: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 762: A buffer overflow exists in named(8) that could lead to a
763: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 764: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 765: Incorrect argument checking in the getitimer(2) system call
766: may allow an attacker to crash the system.</a>
1.294 david 767: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 768: An attacker can bypass smrsh(8)'s restrictions and execute
769: arbitrary commands with the privileges of his own account.</a>
1.294 david 770: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 771: A buffer overflow can occur in the kadmind(8) daemon, leading
772: to possible remote crash or exploit.</a>
1.294 david 773: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 774: Incorrect argument checking in the setitimer(2) system call
775: may allow an attacker to write to kernel memory.</a>
1.294 david 776: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 777: An insufficient boundary check in the select and poll system calls
778: allows an attacker to overwrite kernel memory and execute arbitrary code
779: in kernel context.</a>
1.294 david 780: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 781: Several remote buffer overflows can occur in the SSL2 server and SSL3
782: client of the ssl(8) library, as in the ASN.1 parser code in the
783: crypto(3) library, all of them being potentially remotely
784: exploitable.</a>
1.294 david 785: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 786: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
787: possible remote crash.</a>
1.294 david 788: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 789: A race condition exists in the pppd(8) daemon which may cause it to
790: alter the file permissions of an arbitrary file.</a>
1.294 david 791: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 792: Receiving IKE payloads out of sequence can cause isakmpd(8) to
793: crash.</a>
1.294 david 794: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 795: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 796: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 797: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 798: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 799: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 800: input validation error that can result in an integer overflow and
801: privilege escalation.</a>
1.294 david 802: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 803: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 804: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 805: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 806: A buffer overflow can occur during the interpretation of chunked
807: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 808: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 809: A race condition exists that could defeat the kernel's
810: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 811: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 812: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 813: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 814: A local user can gain super-user privileges due to a buffer
815: overflow in sshd(8) if AFS has been configured on the system
816: or if KerberosTgtPassing or AFSTokenPassing has been enabled
817: in the sshd_config file.</a>
1.294 david 818: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 819: The mail(1) was interpreting tilde escapes even when invoked
820: in non-interactive mode. As mail(1) is called as root from cron,
821: this can lead to a local root compromise.</a>
1.294 david 822: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 823: Under certain conditions, on systems using YP with netgroups in
824: the password database, it is possible for the rexecd(8) and rshd(8)
825: daemons to execute a shell from a password database entry for a
826: different user. Similarly, atrun(8) may change to the wrong
827: home directory when running jobs.</a>
1.294 david 828: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 829: A potential double free() exists in the zlib library;
830: this is not exploitable on OpenBSD.
831: The kernel also contains a copy of zlib; it is not
832: currently known if the kernel zlib is exploitable.</a>
1.294 david 833: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 834: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 835: may allow a local user to gain super-user privileges.</a>
1.294 david 836: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 837: A race condition between the ptrace(2) and execve(2) system calls
838: allows an attacker to modify the memory contents of suid/sgid
839: processes which could lead to compromise of the super-user account.</a>
1.294 david 840: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 841: There is a security hole in sudo(8) that can be exploited
842: when the Postfix sendmail replacement is installed that may
843: allow an attacker on the local host to gain root privileges.</a>
1.294 david 844: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 845: An attacker can trick a machine running the lpd daemon into
846: creating new files in the root directory from a machine with
847: remote line printer access.</a>
1.294 david 848: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 849: The vi.recover script can be abused in such a way as
850: to cause arbitrary zero-length files to be removed.</a>
1.294 david 851: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 852: pf(4) was incapable of dealing with certain ipv6 icmp packets,
853: resulting in a crash.</a>
1.294 david 854: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 855: A security hole that may allow an attacker to partially authenticate
856: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 857: </ul>
858:
859: <p>
860: <li>
1.288 matthieu 861: <a name="29"></a>
1.173 deraadt 862:
1.294 david 863: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 864: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 865: in <a href="anoncvs.html">OpenBSD current</a>. The
866: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 867: you should update your machine.
868:
1.173 deraadt 869:
870: <p>
871: <ul>
1.294 david 872: <li><a href="errata29.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="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 875: A race condition exists that could defeat the kernel's
876: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 877: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 878: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 879: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 880: A local user can gain super-user privileges due to a buffer
881: overflow in sshd(8) if AFS has been configured on the system
882: or if KerberosTgtPassing or AFSTokenPassing has been enabled
883: in the sshd_config file.</a>
1.294 david 884: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 885: The mail(1) was interpreting tilde escapes even when invoked
886: in non-interactive mode. As mail(1) is called as root from cron,
887: this can lead to a local root compromise.</a>
1.294 david 888: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 889: A potential double free() exists in the zlib library;
890: this is not exploitable on OpenBSD.
891: The kernel also contains a copy of zlib; it is not
892: currently known if the kernel zlib is exploitable.</a>
1.294 david 893: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 894: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 895: may allow a local user to gain super-user privileges.</a>
1.294 david 896: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 897: A race condition between the ptrace(2) and execve(2) system calls
898: allows an attacker to modify the memory contents of suid/sgid
899: processes which could lead to compromise of the super-user account.</a>
1.294 david 900: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 901: There is a security hole in sudo(8) that can be exploited
902: when the Postfix sendmail replacement is installed that may
903: allow an attacker on the local host to gain root privileges.</a>
1.294 david 904: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 905: An attacker can trick a machine running the lpd daemon into
906: creating new files in the root directory from a machine with
907: remote line printer access.</a>
1.294 david 908: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 909: The vi.recover script can be abused in such a way as
910: to cause arbitrary zero-length files to be removed.</a>
1.294 david 911: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 912: A security hole exists in uuxqt(8) that may allow an
913: attacker to gain root privileges.</a>
1.294 david 914: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 915: A security hole exists in lpd(8) that may allow an
916: attacker to gain root privileges if lpd is running.</a>
1.294 david 917: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 918: A security hole exists in sendmail(8) that may allow an
919: attacker on the local host to gain root privileges.</a>
1.294 david 920: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 921: A kernel buffer overflow in the NFS code can be used to execute
922: arbitrary code by users with mount privileges (only root by
1.181 millert 923: default).</a>
1.294 david 924: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 925: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 926: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 927: sshd(8) allows users to delete arbitrary files named "cookies"
928: if X11 forwarding is enabled. X11 forwarding is disabled
929: by default.</a>
1.294 david 930: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 931: Programs using the fts routines can be tricked into changing
932: into the wrong directory.</a>
1.294 david 933: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 934: Sendmail signal handlers contain unsafe code,
935: leading to numerous race conditions.</a>
1.173 deraadt 936: </ul>
937:
938: <p>
939: <li>
1.288 matthieu 940: <a name="28"></a>
1.152 deraadt 941:
1.294 david 942: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 943: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 944: in <a href="anoncvs.html">OpenBSD current</a>. The
945: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 946: you should update your machine.
947:
1.152 deraadt 948:
949: <p>
950: <ul>
1.294 david 951: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 952: A security hole exists in uuxqt(8) that may allow an
953: attacker to gain root privileges.</a>
1.294 david 954: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 955: A security hole exists in lpd(8) that may allow an
956: attacker to gain root privileges if lpd is running.</a>
1.294 david 957: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 958: A security hole exists in sendmail(8) that may allow an
959: attacker on the local host to gain root privileges.</a>
1.294 david 960: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 961: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 962: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 963: Programs using the fts routines can be tricked into changing
964: into the wrong directory.</a>
1.294 david 965: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 966: Sendmail signal handlers contain unsafe code,
967: leading to numerous race conditions.</a>
1.294 david 968: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 969: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 970: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 971: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 972: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 973: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 974: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 975: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 976: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 977: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 978: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 979: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 980: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 981: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 982: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 983: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 984: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 985: rnd(4) did not use all of its input when written to.</a>
1.294 david 986: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 987: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 988: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 989: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 990: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 991: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 992: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 993: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 994: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 995: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 996: </ul>
997:
998: <p>
999: <li>
1.288 matthieu 1000: <a name="27"></a>
1.124 deraadt 1001:
1.294 david 1002: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1003: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1004: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1005: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1006:
1007: <p>
1008: <ul>
1.294 david 1009: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1010: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1011: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1012: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1013: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1014: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1015: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1016: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1017: (patch included)</a>
1.294 david 1018: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1019: X11 libraries have 2 potential overflows in xtrans code.
1020: (patch included)</a>
1.294 david 1021: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1022: Apache mod_rewrite and mod_vhost_alias modules could expose files
1023: on the server in certain configurations if used.
1024: (patch included)</a>
1.294 david 1025: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1026: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1027: TERMPATH and TERMCAP environment variables as it should.
1028: (patch included)</a>
1.294 david 1029: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1030: There are printf-style format string bugs in several privileged
1031: programs. (patch included)</a>
1.294 david 1032: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1033: libcurses honored terminal descriptions in the $HOME/.terminfo
1034: directory as well as in the TERMCAP environment variable for
1035: setuid and setgid applications.
1.146 deraadt 1036: (patch included)</a>
1.294 david 1037: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1038: A format string vulnerability exists in talkd(8).
1039: (patch included)</a>
1.294 david 1040: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1041: A format string vulnerability exists in the pw_error() function of the
1042: libutil library, yielding localhost root through chpass(1).
1043: (patch included)</a>
1.294 david 1044: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1045: Bad ESP/AH packets could cause a crash under certain conditions.
1046: (patch included)</a>
1.294 david 1047: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1048: A format string vulnerability (localhost root) exists in xlock(1).
1049: (patch included)</a>
1.294 david 1050: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1051: Various bugs found in X11 libraries have various side effects, almost
1052: completely denial of service in OpenBSD.
1053: (patch included)</a>
1.294 david 1054: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1055: Just like pretty much all the other unix ftp daemons
1056: on the planet, ftpd had a remote root hole in it.
1057: Luckily, ftpd was not enabled by default.
1.137 deraadt 1058: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1059: (patch included)</a>
1.294 david 1060: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1061: Mopd, very rarely used, contained some buffer overflows.
1062: (patch included)</a>
1.294 david 1063: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1064: libedit would check for a <b>.editrc</b> file in the current
1065: directory. Not known to be a real security issue, but a patch
1066: is available anyways.
1067: (patch included)</a>
1.294 david 1068: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1069: A serious bug in dhclient(8) could allow strings from a
1070: malicious dhcp server to be executed in the shell as root.
1071: (patch included)</a>
1.294 david 1072: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1073: A serious bug in isakmpd(8) policy handling wherein
1074: policy verification could be completely bypassed in isakmpd.
1075: (patch included)</a>
1.294 david 1076: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1077: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1078: should not be used, and results in security problems on
1079: other operating systems.</a>
1.294 david 1080: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1081: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1082: (patch included)</a>
1.294 david 1083: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1084: Improper use of ipf <i>keep-state</i> rules can result
1085: in firewall rules being bypassed. (patch included)</a>
1086:
1.124 deraadt 1087: </ul>
1088:
1089: <p>
1090: <li>
1.288 matthieu 1091: <a name="26"></a>
1.119 deraadt 1092:
1.294 david 1093: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1094: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1095: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1096: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1097:
1098: <p>
1099: <ul>
1.294 david 1100: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1101: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1102: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1103: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1104: Improper use of ipf <i>keep-state</i> rules can result
1105: in firewall rules being bypassed. (patch included)</a>
1.294 david 1106: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1107: xlockmore has a bug which a localhost attacker can use to gain
1108: access to the encrypted root password hash (which is normally
1.245 miod 1109: encoded using blowfish</a> (see
1.294 david 1110: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1111: crypt(3)</a>)
1.245 miod 1112: (patch included).
1.294 david 1113: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1114: Systems running with procfs enabled and mounted are
1115: vulnerable to a very tricky exploit. procfs is not
1116: mounted by default.
1117: (patch included).</a>
1.294 david 1118: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1119: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1120: thus exposing the system to a race where the aliases file
1121: did not exist.
1.119 deraadt 1122: (patch included).</a>
1.294 david 1123: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1124: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1125: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1126: A buffer overflow in the RSAREF code included in the
1127: USA version of libssl, is possibly exploitable in
1128: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1129: (patch included).<br></a>
1130: <strong>Update:</strong> Turns out that this was not exploitable
1131: in any of the software included in OpenBSD 2.6.
1.294 david 1132: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1133: Any user could change interface media configurations, resulting in
1134: a localhost denial of service attack.
1.121 deraadt 1135: (patch included).</a>
1.119 deraadt 1136: </ul>
1137:
1138: <p>
1139: <li>
1.288 matthieu 1140: <a name="25"></a>
1.106 deraadt 1141:
1.294 david 1142: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1143: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1144: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1145: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1146:
1.96 deraadt 1147: <p>
1.104 deraadt 1148: <ul>
1.294 david 1149: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1150: In cron(8), make sure argv[] is NULL terminated in the
1151: fake popen() and run sendmail as the user, not as root.
1152: (patch included).</a>
1.294 david 1153: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1154: filesystems had an overrun in their handling of uio_offset
1155: in their readdir() routines. (These filesystems are not
1156: enabled by default). (patch included).</a>
1.294 david 1157: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1158: when we execve() a new process. (patch included).</a>
1.294 david 1159: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1160: been handled by IPsec may be transmitted as cleartext.
1161: PF_KEY SA expirations may leak kernel resources.
1162: (patch included).</a>
1.294 david 1163: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1164: motd re-writing and change the find(1) to use -execdir
1165: (patch included).</a>
1.294 david 1166: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1167: users to chflags(2) or fchflags(2) on character or block devices
1168: which they may currently be the owner of (patch included).</a>
1.294 david 1169: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1170: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1171: </ul>
1172:
1.106 deraadt 1173: <p>
1174: <li>
1.288 matthieu 1175: <a name="24"></a>
1.235 miod 1176:
1.294 david 1177: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1178: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1179: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1180: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1181:
1.96 deraadt 1182: <p>
1.75 deraadt 1183: <ul>
1.294 david 1184: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1185: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1186: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1187: another kernel crash case caused by the <strong>crashme</strong>
1188: program (patch included).</a>
1.294 david 1189: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1190: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1191: (patch included).</a>
1.294 david 1192: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1193: existed in ping(8). (patch included).</a>
1.294 david 1194: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1195: the ipq, which could permit an attacker to cause a crash.
1196: (patch included).</a>
1.294 david 1197: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1198: kernel between accept(2) and select(2) could permit an attacker
1199: to hang sockets from remote.
1200: (patch included).</a>
1.294 david 1201: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1202: bog the machine excessively and cause problems.
1203: (patch included).</a>
1.294 david 1204: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1205: DDB interacted to possibly cause a crash.
1206: (patch included).</a>
1.294 david 1207: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1208: (patch included).</a>
1.294 david 1209: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1210: problem in bootpd(8). (patch included).</a>
1.294 david 1211: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1212: exploitable problem relating to environment variables in termcap
1213: and curses. (patch included).</a>
1.294 david 1214: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1215: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1216: </ul>
1217:
1.106 deraadt 1218: <p>
1219: <li>
1.288 matthieu 1220: <a name="23"></a>
1.235 miod 1221:
1.294 david 1222: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1223: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1224: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1225: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1226:
1.96 deraadt 1227: <p>
1.53 matthieu 1228: <ul>
1.294 david 1229: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1230: problem in bootpd(8). (patch included).</a>
1.294 david 1231: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1232: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1233: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1234: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1235: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1236: chpass(1) has a file descriptor leak which allows an
1237: attacker to modify /etc/master.passwd.</a>
1.294 david 1238: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1239: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1240: should not be executed with fd slots 0, 1, or 2 free.
1241: (patch included).</a>
1.294 david 1242: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1243: libraries (patches included).</a>
1.294 david 1244: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1245: processes too permissive (4th revision patch included).</a>
1.294 david 1246: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1247: of immutable and append-only file flags. (patch included).</a>
1.294 david 1248: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1249: if IPSEC is enabled (patch included).</a>
1.294 david 1250: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1251: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1252: </ul>
1.9 deraadt 1253:
1.106 deraadt 1254: <p>
1255: <li>
1.288 matthieu 1256: <a name="22"></a>
1.235 miod 1257:
1.294 david 1258: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1259: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1260: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1261: still exist in other operating systems. (The supplied patches are for
1262: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1263:
1.96 deraadt 1264: <p>
1.9 deraadt 1265: <ul>
1.294 david 1266: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1267: packets if IPSEC is enabled (patch included).</a>
1.294 david 1268: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1269: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1270: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1271: (patch included).</a>
1.294 david 1272: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1273: (patch included).</a>
1.294 david 1274: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1275: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1276: (patch included).</a>
1.294 david 1277: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1278: export (patch included).</a>
1.112 philen 1279: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1280: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1281: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1282: Acceptance.</a>
1.294 david 1283: A patch is available <a href="errata22.html#sourceroute">here</a>.
1284: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1285: flaw (patch included).</a>
1.294 david 1286: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1287: </ul>
1288:
1.106 deraadt 1289: <p>
1290: <li>
1.288 matthieu 1291: <a name="21"></a>
1.235 miod 1292:
1.294 david 1293: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1294: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1295: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1296: exist in other operating systems. (If you are running OpenBSD 2.1, we
1297: would strongly recommend an upgrade to the newest release, as this
1298: patch list only attempts at fixing the most important security
1299: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1300: security problems. Many of those problems were solved in ways which
1301: make it hard for us to provide patches).
1302:
1.96 deraadt 1303: <p>
1.52 deraadt 1304: <ul>
1.112 philen 1305: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1306: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1307: (patch included)</a>
1.112 philen 1308: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1309: </ul>
1.51 deraadt 1310:
1.106 deraadt 1311: <p>
1312: <li>
1.288 matthieu 1313: <a name="20"></a>
1.235 miod 1314:
1.294 david 1315: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1316: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1317: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1318: exist in other operating systems. (If you are running OpenBSD 2.0, we
1319: commend you for being there back in the old days!, but you're really
1320: missing out if you don't install a new version!)
1321:
1322: <p>
1323: <ul>
1.112 philen 1324: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1325: resolver (patch included)</a>
1326: <li>Many others... if people can hunt them down, please let me know
1327: and we'll put them up here.
1328: </ul>
1.51 deraadt 1329: <p>
1.106 deraadt 1330:
1.288 matthieu 1331: <a name="watching"></a>
1.294 david 1332: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1333:
1.21 deraadt 1334: Since we take a proactive stance with security, we are continually
1335: finding and fixing new security problems. Not all of these problems
1.80 espie 1336: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1337: confirmed to be exploitable; many simple bugs we fix do turn out to
1338: have security consequences we could not predict. We do not have the
1339: time resources to make these changes available in the above format.<p>
1.21 deraadt 1340:
1341: Thus there are usually minor security fixes in the current source code
1342: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1343: guarantee that these problems are of minimal impact and unproven
1.44 ian 1344: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1345: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1346:
1.45 deraadt 1347: People who are really concerned with security can do a number of
1348: things:<p>
1.21 deraadt 1349:
1350: <ul>
1351: <li>If you understand security issues, watch our
1.294 david 1352: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1353: eye out for things which appear security related. Since
1.21 deraadt 1354: exploitability is not proven for many of the fixes we make,
1355: do not expect the relevant commit message to say "SECURITY FIX!".
1356: If a problem is proven and serious, a patch will be available
1357: here very shortly after.
1.161 horacio 1358: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1359: security-announce mailing list</a> which will notify you for every
1.186 ian 1360: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1361: and instruct you on how to patch the problem.
1.21 deraadt 1362: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1363: complete system build from time to time (read /usr/src/Makefile
1364: carefully). Users can make the assumption that the current
1365: source tree always has stronger security than the previous release.
1.45 deraadt 1366: However, building your own system from source code is not trivial;
1.265 miod 1367: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1368: transition between major releases.
1.115 ericj 1369: <li>Install a binary snapshot for your
1.80 espie 1370: architecture, which are made available fairly often. For
1.29 deraadt 1371: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1372: </ul>
1373:
1.9 deraadt 1374: <p>
1.288 matthieu 1375: <a name="reporting"></a>
1.294 david 1376: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1377:
1.5 deraadt 1378: <p> If you find a new security problem, you can mail it to
1.294 david 1379: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1380: <br>
1.5 deraadt 1381: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1382: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1383:
1.107 deraadt 1384: <p>
1.288 matthieu 1385: <a name="papers"></a>
1.294 david 1386: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1387:
1388: A number of papers have been written by OpenBSD team members, about security
1389: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1390: documents are available as follows.<p>
1.107 deraadt 1391:
1392: <ul>
1.113 deraadt 1393: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1394: <a href="events.html#usenix99">Usenix 1999</a>,
1395: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1396: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1397: <a href="papers/bcrypt-paper.ps">paper</a> and
1398: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1399: <p>
1400: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1401: <a href="events.html#usenix99">Usenix 1999</a>,
1402: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1403: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1404: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1405: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1406: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1407: <a href="papers/crypt-paper.ps">paper</a> and
1408: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1409: <p>
1410: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1411: <a href="events.html#usenix99">Usenix 1999</a>,
1412: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1413: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1414: <a href="papers/strlcpy-paper.ps">paper</a> and
1415: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1416: <p>
1.118 deraadt 1417: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1418: <a href="events.html#lisa99">LISA 1999</a>,
1419: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1420: <a href="papers/authgw-paper.ps">paper</a> and
1421: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1422: <p>
1.153 jufi 1423: <li>Encrypting Virtual Memory<br>
1.294 david 1424: <a href="events.html#sec2000">Usenix Security 2000</a>,
1425: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1426: <a href="papers/swapencrypt.ps">paper</a> and
1427: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1428: <p>
1.107 deraadt 1429: </ul>
1.294 david 1430: </ul>
1.106 deraadt 1431:
1.2 deraadt 1432: <hr>
1.294 david 1433: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1434: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1435: <br>
1.323 ! steven 1436: <small>$OpenBSD: security.html,v 1.322 2006/05/03 02:50:06 brad Exp $</small>
1.1 deraadt 1437:
1.24 deraadt 1438: </body>
1439: </html>
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