Annotation of www/security.html, Revision 1.327
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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>
1.327 ! brad 235: <li><a href="errata.html#sppp">Sep 2, 2006:
! 236: Due to the failure to correctly validate LCP configuration option
! 237: lengths, it is possible for an attacker to send LCP packets via an
! 238: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 239: <li><a href="errata.html#isakmpd">Aug 25, 2006:
240: A problem in isakmpd(8) caused IPsec to run partly without replay
241: protection.</a>
242: <li><a href="errata.html#sem">Aug 25, 2006:
243: It is possible to cause the kernel to panic when more than the default
244: number of sempahores have been allocated.</a>
245: <li><a href="errata.html#dhcpd">Aug 25, 2006:
246: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
247: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
248: option.</a>
249: <li><a href="errata.html#sendmail3">Aug 25, 2006:
250: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 251: <li><a href="errata.html#httpd">Jul 30, 2006:
252: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
253: overflow.</a>
1.324 brad 254: <li><a href="errata.html#sendmail2">Jun 15, 2006:
255: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 256: <li><a href="errata.html#xorg">May 2, 2006:
257: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 258: <li><a href="errata.html#sendmail">Mar 25, 2006:
259: A race condition has been reported to exist in the handling by sendmail
260: of asynchronous signals.</a>
261: </ul>
262:
263: <li>
1.318 deraadt 264: <a name="38"></a>
265:
266: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
267: These are the OpenBSD 3.8 advisories -- all these problems are solved
268: in <a href=anoncvs.html>OpenBSD current</a> and the
269: <a href=stable.html>patch branch</a>.
270:
271: <p>
272: <ul>
1.327 ! brad 273: <li><a href="errata38.html#sppp">Sep 2, 2006:
! 274: Due to the failure to correctly validate LCP configuration option
! 275: lengths, it is possible for an attacker to send LCP packets via an
! 276: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 277: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
278: A problem in isakmpd(8) caused IPsec to run partly without replay
279: protection.</a>
280: <li><a href="errata38.html#sem">Aug 25, 2006:
281: It is possible to cause the kernel to panic when more than the default
282: number of sempahores have been allocated.</a>
283: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
284: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
285: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
286: option.</a>
287: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
288: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 289: <li><a href="errata38.html#httpd">Jul 30, 2006:
290: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
291: overflow.</a>
1.324 brad 292: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
293: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 294: <li><a href="errata38.html#xorg">May 2, 2006:
295: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 296: <li><a href="errata38.html#sendmail">Mar 25, 2006:
297: A race condition has been reported to exist in the handling by sendmail
298: of asynchronous signals.</a>
299: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 300: Josh Bressers has reported a weakness in OpenSSH caused due to the
301: insecure use of the system(3) function in scp(1) when performing copy
302: operations using filenames that are supplied by the user from the
303: command line.</a>
1.321 brad 304: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 305: Do not allow users to trick suid programs into re-opening files via
306: /dev/fd.</a>
1.321 brad 307: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 308: A buffer overflow has been found in the Perl interpreter with the
309: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 310: </ul>
311:
1.323 steven 312: <p>
313: OpenBSD 3.7 and earlier releases are not supported anymore. The following
314: paragraphs only list advisories issued while they were maintained; these
315: releases are likely to be affected by the advisories for more recent releases.
316: <br>
317:
1.318 deraadt 318: <li>
1.312 david 319: <a name="37"></a>
320:
321: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
322: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 323: in <a href="anoncvs.html">OpenBSD current</a>. The
324: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
325: you should update your machine.
1.312 david 326:
327: <p>
328: <ul>
1.322 brad 329: <li><a href="errata37.html#xorg">May 2, 2006:
330: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 331: <li><a href="errata37.html#sendmail">Mar 25, 2006:
332: A race condition has been reported to exist in the handling by sendmail
333: of asynchronous signals.</a>
1.320 brad 334: <li><a href="errata37.html#ssh">Feb 12, 2006:
335: Josh Bressers has reported a weakness in OpenSSH caused due to the
336: insecure use of the system(3) function in scp(1) when performing copy
337: operations using filenames that are supplied by the user from the
338: command line.</a>
1.319 brad 339: <li><a href="errata37.html#fd">Jan 5, 2006:
340: Do not allow users to trick suid programs into re-opening files via
341: /dev/fd.</a>
342: <li><a href="errata37.html#perl">Jan 5, 2006:
343: A buffer overflow has been found in the Perl interpreter with the
344: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 345: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 346: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 347: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 348: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 349: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 350: Fix a race condition in sudo(8) that could allow a user
1.315 millert 351: to run arbitrary commands.</a>
1.318 deraadt 352: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 353: Fix a buffer overflow, memory leaks, and NULL pointer
354: dereference in cvs(1).</a>
1.312 david 355: </ul>
356:
357: <li>
1.301 miod 358: <a name="36"></a>
359:
360: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
361: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 362: in <a href="anoncvs.html">OpenBSD current</a>. The
363: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
364: you should update your machine.
1.301 miod 365:
366: <p>
1.302 markus 367: <ul>
1.317 millert 368: <li><a href="errata36.html#libz2">Jul 21, 2005:
369: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 370: <li><a href="errata36.html#libz">Jul 6, 2005:
371: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 372: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 373: Fix a race condition in sudo(8) that could allow a user
1.315 millert 374: to run arbitrary commands.</a>
1.311 deraadt 375: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 376: Fix a buffer overflow, memory leaks, and NULL pointer
377: dereference in cvs(1).</a>
1.311 deraadt 378: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 379: Due to buffer overflows in telnet(1), a malicious
380: server or man-in-the-middle attack could allow
381: execution of arbitrary code with the privileges of
382: the user invoking telnet(1).</a>
1.311 deraadt 383: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 384: More stringent checking should be done in the copy(9)
385: functions to prevent their misuse.</a>
1.311 deraadt 386: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 387: More stringent checking should be done in the copy(9)
388: functions to prevent their misuse.</a>
1.311 deraadt 389: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 390: httpd(8)'s mod_include module fails to properly validate
391: the length of user supplied tag strings prior to copying
1.305 brad 392: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 393: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 394: On systems running isakmpd(8) it is possible for a local
395: user to cause kernel memory corruption and system panic by
1.303 markus 396: setting ipsec(4) credentials on a socket.</a>
1.302 markus 397: </ul>
1.301 miod 398:
399: <li>
1.288 matthieu 400: <a name="35"></a>
1.279 deraadt 401:
1.294 david 402: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 403: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 404: in <a href="anoncvs.html">OpenBSD current</a>. The
405: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
406: you should update your machine.
1.279 deraadt 407:
408: <p>
409: <ul>
1.310 brad 410: <li><a href="errata35.html#cvs4">Apr 28, 2005:
411: Fix a buffer overflow, memory leaks, and NULL pointer
412: dereference in cvs(1).</a>
1.309 brad 413: <li><a href="errata35.html#telnet">Mar 30, 2005:
414: Due to buffer overflows in telnet(1), a malicious
415: server or man-in-the-middle attack could allow
416: execution of arbitrary code with the privileges of
417: the user invoking telnet(1).</a>
1.308 brad 418: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 419: More stringent checking should be done in the copy(9)
420: functions to prevent their misuse.</a>
1.306 brad 421: <li><a href="errata35.html#locore">Feb 28, 2005:
422: More stringent checking should be done in the copy(9)
423: functions to prevent their misuse.</a>
1.304 brad 424: <li><a href="errata35.html#httpd3">Jan 12, 2005:
425: httpd(8)'s mod_include module fails to properly validate
426: the length of user supplied tag strings prior to copying
1.305 brad 427: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 428: <li><a href="errata35.html#pfkey">Dec 14, 2004:
429: On systems running isakmpd(8) it is possible for a local
430: user to cause kernel memory corruption and system panic by
1.303 markus 431: setting ipsec(4) credentials on a socket.</a>
1.301 miod 432: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 433: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 434: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 435: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 436: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 437: httpd(8)'s mod_rewrite module can be made to write one zero byte in
438: an arbitrary memory position outside of a char array, causing a DoS
439: or possibly buffer overflows.</a>
1.301 miod 440: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 441: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 442: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 443: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 444: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 445: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 446: Multiple remote vulnerabilities have been found in the cvs(1)
447: server which can be used by CVS clients to crash or execute
1.293 brad 448: arbitrary code on the server.</a>
1.301 miod 449: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 450: kdc(8) performs inadequate checking of request fields, leading
451: to the possibility of principal impersonation from other
452: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 453: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 454: xdm(1) ignores the requestPort resource and creates a
1.293 brad 455: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 456: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 457: A buffer overflow in the cvs(1) server has been found,
458: which can be used by CVS clients to execute arbitrary code on
1.293 brad 459: the server.</a>
1.301 miod 460: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 461: Integer overflow problems were found in procfs, allowing
1.293 brad 462: reading of arbitrary kernel memory.</a>
1.301 miod 463: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 464: Pathname validation problems have been found in cvs(1),
465: allowing clients and servers access to files outside the
1.293 brad 466: repository or local CVS tree.</a>
1.279 deraadt 467: </ul>
468:
469: <p>
470: <li>
1.288 matthieu 471: <a name="34"></a>
1.261 david 472:
1.294 david 473: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 474: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 475: in <a href="anoncvs.html">OpenBSD current</a>. The
476: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
477: you should update your machine.
1.261 david 478: <p>
479: <ul>
1.302 markus 480: <li><a href="errata34.html#pfkey">Dec 14, 2004:
481: On systems running isakmpd(8) it is possible for a local
482: user to cause kernel memory corruption and system panic by
1.303 markus 483: setting ipsec(4) credentials on a socket.</a>
1.298 brad 484: <li><a href="errata34.html#xpm">Sep 16, 2004:
485: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 486: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
487: httpd(8)'s mod_rewrite module can be made to write one zero byte in
488: an arbitrary memory position outside of a char array, causing a DoS
489: or possibly buffer overflows.</a>
1.294 david 490: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 491: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 492: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 493: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 494: an attacker can delete IPsec tunnels at will.</a>
1.294 david 495: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 496: Multiple remote vulnerabilities have been found in the cvs(1)
497: server which can be used by CVS clients to crash or execute
1.293 brad 498: arbitrary code on the server.</a>
1.294 david 499: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 500: kdc(8) performs inadequate checking of request fields, leading
501: to the possibility of principal impersonation from other
502: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 503: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 504: A buffer overflow in the cvs(1) server has been found,
505: which can be used by CVS clients to execute arbitrary code on
506: the server.</a>
1.294 david 507: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 508: Integer overflow problems were found in procfs, allowing
509: reading of arbitrary kernel memory.</a>
1.294 david 510: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 511: Pathname validation problems have been found in cvs(1),
512: allowing clients and servers access to files outside the
513: repository or local CVS tree.</a>
1.294 david 514: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 515: A missing check for a NULL-pointer dereference may allow a
1.281 otto 516: remote attacker to crash applications using OpenSSL.</a>
1.294 david 517: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 518: Defects in the payload validation and processing functions of
519: isakmpd have been discovered. An attacker could send malformed
520: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 521: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 522: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
523: access module, using IP addresses without a netmask on big endian
524: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 525: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 526: An IPv6 MTU handling problem exists that could be used by an
527: attacker to cause a denial of service attack.</a>
1.294 david 528: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 529: A reference counting bug in shmat(2) could be used to write to
530: kernel memory under certain circumstances.</a>
1.294 david 531: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 532: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 533: by Thomas Walpuski.</a>
1.294 david 534: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 535: It may be possible for a local user to overrun the stack in
536: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 537: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 538: The use of certain ASN.1 encodings or malformed public keys may
539: allow an attacker to mount a denial of service attack against
540: applications linked with ssl(3).</a>
1.261 david 541: </ul>
542:
543: <li>
1.288 matthieu 544: <a name="33"></a>
1.246 deraadt 545:
1.294 david 546: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 547: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 548: in <a href="anoncvs.html">OpenBSD current</a>. The
549: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 550: you should update your machine.
1.246 deraadt 551: <p>
552: <ul>
1.294 david 553: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 554: Pathname validation problems have been found in cvs(1),
555: allowing clients and servers access to files outside the
556: repository or local CVS tree.</a>
1.294 david 557: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 558: A missing check for a NULL-pointer dereference may allow a
1.281 otto 559: remote attacker to crash applications using OpenSSL.</a>
1.294 david 560: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 561: Defects in the payload validation and processing functions of
562: isakmpd have been discovered. An attacker could send malformed
563: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 564: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 565: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
566: access module, using IP addresses without a netmask on big endian
567: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 568: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 569: An IPv6 MTU handling problem exists that could be used by an
570: attacker to cause a denial of service attack.</a>
1.294 david 571: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 572: A reference counting bug in shmat(2) could be used to write to
573: kernel memory under certain circumstances.</a>
1.294 david 574: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 575: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 576: by Thomas Walpuski.</a>
1.294 david 577: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 578: It may be possible for a local user to execute arbitrary code
579: resulting in escalation of privileges due to a stack overrun
580: in compat_ibcs2(8).</a>
1.294 david 581: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 582: The use of certain ASN.1 encodings or malformed public keys may
583: allow an attacker to mount a denial of service attack against
584: applications linked with ssl(3).</a>
1.294 david 585: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 586: Access of freed memory in pf(4) could be used to
1.260 margarid 587: remotely panic a machine using scrub rules.</a>
1.294 david 588: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 589: A buffer overflow in the address parsing in
590: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 591: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 592: OpenSSH versions prior to 3.7 contains a buffer management error
593: that is potentially exploitable.</a>
1.294 david 594: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 595: Root may be able to reduce the security level by taking advantage of
596: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 597: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 598: An improper bounds check in the kernel may allow a local user
599: to panic the kernel.</a>
1.294 david 600: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 601: An off-by-one error exists in the C library function realpath(3)
602: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 603: </ul>
604:
1.265 miod 605:
1.247 david 606: <p>
1.246 deraadt 607: <li>
1.288 matthieu 608: <a name="32"></a>
1.224 deraadt 609:
1.294 david 610: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 611: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 612: in <a href="anoncvs.html">OpenBSD current</a>. The
613: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 614: you should update your machine.
1.224 deraadt 615: <p>
616: <ul>
1.294 david 617: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 618: The use of certain ASN.1 encodings or malformed public keys may
619: allow an attacker to mount a denial of service attack against
620: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 621: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 622: Access of freed memory in pf(4) could be used to
1.260 margarid 623: remotely panic a machine using scrub rules.</a>
1.294 david 624: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 625: A buffer overflow in the address parsing in
626: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 627: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 628: OpenSSH versions prior to 3.7 contains a buffer management error
629: that is potentially exploitable.</a>
1.294 david 630: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 631: Fix for a potential security issue in
632: sendmail(8) with respect to DNS maps.</a>
1.294 david 633: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 634: An off-by-one error exists in the C library function realpath(3)
635: may allow an attacker to gain escalated privileges.</a>
1.294 david 636: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 637: A buffer overflow in the address parsing in
638: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 639: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 640: A cryptographic weaknesses in the Kerberos v4 protocol can be
641: exploited on Kerberos v5 as well.</a>
1.294 david 642: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 643: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 644: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 645: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 646: Various SSL and TLS operations in OpenSSL are vulnerable to
647: timing attacks.</a>
1.294 david 648: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 649: A buffer overflow in lprm(1) may allow an attacker to elevate
650: privileges to user daemon.</a>.
1.294 david 651: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 652: A buffer overflow in the envelope comments processing in
653: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 654: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 655: httpd(8) leaks file inode numbers via ETag header as well as
656: child PIDs in multipart MIME boundary generation. This could
657: lead, for example, to NFS exploitation because it uses inode
658: numbers as part of the file handle.</a>
1.294 david 659: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 660: In ssl(8) an information leak can occur via timing by performing
661: a MAC computation even if incorrect block cipher padding has
662: been found, this is a countermeasure. Also, check for negative
663: sizes, in allocation routines.</a>
1.294 david 664: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 665: A double free exists in cvs(1) that could lead to privilege
666: escalation for cvs configurations where the cvs command is
1.233 margarid 667: run as a privileged user.</a>
1.294 david 668: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 669: A buffer overflow exists in named(8) that could lead to a
670: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 671: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 672: A logic error in the pool kernel memory allocator could cause
673: memory corruption in low-memory situations, causing the system
674: to crash.</a>
1.294 david 675: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 676: An attacker can bypass smrsh(8)'s restrictions and execute
677: arbitrary commands with the privileges of his own account.</a>
1.294 david 678: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 679: Network bridges running pf with scrubbing enabled could cause
680: mbuf corruption, causing the system to crash.</a>
1.294 david 681: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 682: A buffer overflow can occur in the kadmind(8) daemon, leading
683: to possible remote crash or exploit.</a>
1.224 deraadt 684: </ul>
685:
1.227 miod 686: <p>
687: <li>
1.288 matthieu 688: <a name="31"></a>
1.203 deraadt 689:
1.294 david 690: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 691: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 692: in <a href="anoncvs.html">OpenBSD current</a>. The
693: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 694: you should update your machine.
1.203 deraadt 695:
696: <p>
697: <ul>
1.294 david 698: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 699: A buffer overflow in the address parsing in
700: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 701: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 702: A cryptographic weaknesses in the Kerberos v4 protocol can be
703: exploited on Kerberos v5 as well.</a>
1.294 david 704: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 705: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 706: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 707: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 708: Various SSL and TLS operations in OpenSSL are vulnerable to
709: timing attacks.</a>
1.294 david 710: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 711: A buffer overflow in lprm(1) may allow an attacker to gain
712: root privileges.</a>
1.294 david 713: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 714: A buffer overflow in the envelope comments processing in
715: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 716: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 717: In ssl(8) an information leak can occur via timing by performing
718: a MAC computation even if incorrect block cipher padding has
719: been found, this is a countermeasure. Also, check for negative
720: sizes, in allocation routines.</a>
1.294 david 721: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 722: A double free exists in cvs(1) that could lead to privilege
723: escalation for cvs configurations where the cvs command is
1.294 david 724: run as a privileged user</a>.
725: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 726: A buffer overflow exists in named(8) that could lead to a
727: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 728: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 729: Incorrect argument checking in the getitimer(2) system call
730: may allow an attacker to crash the system.</a>
1.294 david 731: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 732: An attacker can bypass smrsh(8)'s restrictions and execute
733: arbitrary commands with the privileges of his own account.</a>
1.294 david 734: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 735: A buffer overflow can occur in the kadmind(8) daemon, leading
736: to possible remote crash or exploit.</a>
1.294 david 737: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 738: Incorrect argument checking in the setitimer(2) system call
739: may allow an attacker to write to kernel memory.</a>
1.294 david 740: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 741: An insufficient boundary check in the select system call
1.220 miod 742: allows an attacker to overwrite kernel memory and execute arbitrary code
743: in kernel context.</a>
1.294 david 744: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 745: Several remote buffer overflows can occur in the SSL2 server and SSL3
746: client of the ssl(8) library, as in the ASN.1 parser code in the
747: crypto(3) library, all of them being potentially remotely
748: exploitable.</a>
1.294 david 749: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 750: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
751: possible remote crash.</a>
1.294 david 752: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 753: A race condition exists in the pppd(8) daemon which may cause it to
754: alter the file permissions of an arbitrary file.</a>
1.294 david 755: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 756: Receiving IKE payloads out of sequence can cause isakmpd(8) to
757: crash.</a>
1.294 david 758: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 759: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 760: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 761: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 762: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 763: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 764: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 765: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 766: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 767: input validation error that can result in an integer overflow and
768: privilege escalation.</a>
1.294 david 769: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 770: A buffer overflow can occur during the interpretation of chunked
771: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 772: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 773: Under certain conditions, on systems using YP with netgroups
774: in the password database, it is possible that sshd(8) does
775: ACL checks for the requested user name but uses the password
776: database entry of a different user for authentication. This
777: means that denied users might authenticate successfully
778: while permitted users could be locked out.</a>
1.294 david 779: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 780: A race condition exists that could defeat the kernel's
781: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 782: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 783: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 784: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 785: A local user can gain super-user privileges due to a buffer
786: overflow in sshd(8) if AFS has been configured on the system
787: or if KerberosTgtPassing or AFSTokenPassing has been enabled
788: in the sshd_config file.</a>
1.203 deraadt 789: </ul>
790:
1.235 miod 791: <p>
1.203 deraadt 792: <li>
1.288 matthieu 793: <a name="30"></a>
1.187 deraadt 794:
1.294 david 795: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 796: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 797: in <a href="anoncvs.html">OpenBSD current</a>. The
798: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 799: you should update your machine.
1.187 deraadt 800:
801: <p>
802: <ul>
1.294 david 803: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 804: A buffer overflow exists in named(8) that could lead to a
805: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 806: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 807: Incorrect argument checking in the getitimer(2) system call
808: may allow an attacker to crash the system.</a>
1.294 david 809: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 810: An attacker can bypass smrsh(8)'s restrictions and execute
811: arbitrary commands with the privileges of his own account.</a>
1.294 david 812: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 813: A buffer overflow can occur in the kadmind(8) daemon, leading
814: to possible remote crash or exploit.</a>
1.294 david 815: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 816: Incorrect argument checking in the setitimer(2) system call
817: may allow an attacker to write to kernel memory.</a>
1.294 david 818: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 819: An insufficient boundary check in the select and poll system calls
820: allows an attacker to overwrite kernel memory and execute arbitrary code
821: in kernel context.</a>
1.294 david 822: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 823: Several remote buffer overflows can occur in the SSL2 server and SSL3
824: client of the ssl(8) library, as in the ASN.1 parser code in the
825: crypto(3) library, all of them being potentially remotely
826: exploitable.</a>
1.294 david 827: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 828: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
829: possible remote crash.</a>
1.294 david 830: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 831: A race condition exists in the pppd(8) daemon which may cause it to
832: alter the file permissions of an arbitrary file.</a>
1.294 david 833: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 834: Receiving IKE payloads out of sequence can cause isakmpd(8) to
835: crash.</a>
1.294 david 836: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 837: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 838: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 839: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 840: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 841: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 842: input validation error that can result in an integer overflow and
843: privilege escalation.</a>
1.294 david 844: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 845: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 846: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 847: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 848: A buffer overflow can occur during the interpretation of chunked
849: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 850: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 851: A race condition exists that could defeat the kernel's
852: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 853: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 854: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 855: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 856: A local user can gain super-user privileges due to a buffer
857: overflow in sshd(8) if AFS has been configured on the system
858: or if KerberosTgtPassing or AFSTokenPassing has been enabled
859: in the sshd_config file.</a>
1.294 david 860: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 861: The mail(1) was interpreting tilde escapes even when invoked
862: in non-interactive mode. As mail(1) is called as root from cron,
863: this can lead to a local root compromise.</a>
1.294 david 864: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 865: Under certain conditions, on systems using YP with netgroups in
866: the password database, it is possible for the rexecd(8) and rshd(8)
867: daemons to execute a shell from a password database entry for a
868: different user. Similarly, atrun(8) may change to the wrong
869: home directory when running jobs.</a>
1.294 david 870: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 871: A potential double free() exists in the zlib library;
872: this is not exploitable on OpenBSD.
873: The kernel also contains a copy of zlib; it is not
874: currently known if the kernel zlib is exploitable.</a>
1.294 david 875: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 876: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 877: may allow a local user to gain super-user privileges.</a>
1.294 david 878: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 879: A race condition between the ptrace(2) and execve(2) system calls
880: allows an attacker to modify the memory contents of suid/sgid
881: processes which could lead to compromise of the super-user account.</a>
1.294 david 882: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 883: There is a security hole in sudo(8) that can be exploited
884: when the Postfix sendmail replacement is installed that may
885: allow an attacker on the local host to gain root privileges.</a>
1.294 david 886: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 887: An attacker can trick a machine running the lpd daemon into
888: creating new files in the root directory from a machine with
889: remote line printer access.</a>
1.294 david 890: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 891: The vi.recover script can be abused in such a way as
892: to cause arbitrary zero-length files to be removed.</a>
1.294 david 893: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 894: pf(4) was incapable of dealing with certain ipv6 icmp packets,
895: resulting in a crash.</a>
1.294 david 896: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 897: A security hole that may allow an attacker to partially authenticate
898: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 899: </ul>
900:
901: <p>
902: <li>
1.288 matthieu 903: <a name="29"></a>
1.173 deraadt 904:
1.294 david 905: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 906: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 907: in <a href="anoncvs.html">OpenBSD current</a>. The
908: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 909: you should update your machine.
910:
1.173 deraadt 911:
912: <p>
913: <ul>
1.294 david 914: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 915: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 916: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 917: A race condition exists that could defeat the kernel's
918: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 919: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 920: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 921: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 922: A local user can gain super-user privileges due to a buffer
923: overflow in sshd(8) if AFS has been configured on the system
924: or if KerberosTgtPassing or AFSTokenPassing has been enabled
925: in the sshd_config file.</a>
1.294 david 926: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 927: The mail(1) was interpreting tilde escapes even when invoked
928: in non-interactive mode. As mail(1) is called as root from cron,
929: this can lead to a local root compromise.</a>
1.294 david 930: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 931: A potential double free() exists in the zlib library;
932: this is not exploitable on OpenBSD.
933: The kernel also contains a copy of zlib; it is not
934: currently known if the kernel zlib is exploitable.</a>
1.294 david 935: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 936: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 937: may allow a local user to gain super-user privileges.</a>
1.294 david 938: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 939: A race condition between the ptrace(2) and execve(2) system calls
940: allows an attacker to modify the memory contents of suid/sgid
941: processes which could lead to compromise of the super-user account.</a>
1.294 david 942: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 943: There is a security hole in sudo(8) that can be exploited
944: when the Postfix sendmail replacement is installed that may
945: allow an attacker on the local host to gain root privileges.</a>
1.294 david 946: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 947: An attacker can trick a machine running the lpd daemon into
948: creating new files in the root directory from a machine with
949: remote line printer access.</a>
1.294 david 950: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 951: The vi.recover script can be abused in such a way as
952: to cause arbitrary zero-length files to be removed.</a>
1.294 david 953: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 954: A security hole exists in uuxqt(8) that may allow an
955: attacker to gain root privileges.</a>
1.294 david 956: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 957: A security hole exists in lpd(8) that may allow an
958: attacker to gain root privileges if lpd is running.</a>
1.294 david 959: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 960: A security hole exists in sendmail(8) that may allow an
961: attacker on the local host to gain root privileges.</a>
1.294 david 962: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 963: A kernel buffer overflow in the NFS code can be used to execute
964: arbitrary code by users with mount privileges (only root by
1.181 millert 965: default).</a>
1.294 david 966: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 967: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 968: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 969: sshd(8) allows users to delete arbitrary files named "cookies"
970: if X11 forwarding is enabled. X11 forwarding is disabled
971: by default.</a>
1.294 david 972: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 973: Programs using the fts routines can be tricked into changing
974: into the wrong directory.</a>
1.294 david 975: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 976: Sendmail signal handlers contain unsafe code,
977: leading to numerous race conditions.</a>
1.173 deraadt 978: </ul>
979:
980: <p>
981: <li>
1.288 matthieu 982: <a name="28"></a>
1.152 deraadt 983:
1.294 david 984: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 985: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 986: in <a href="anoncvs.html">OpenBSD current</a>. The
987: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 988: you should update your machine.
989:
1.152 deraadt 990:
991: <p>
992: <ul>
1.294 david 993: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 994: A security hole exists in uuxqt(8) that may allow an
995: attacker to gain root privileges.</a>
1.294 david 996: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 997: A security hole exists in lpd(8) that may allow an
998: attacker to gain root privileges if lpd is running.</a>
1.294 david 999: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1000: A security hole exists in sendmail(8) that may allow an
1001: attacker on the local host to gain root privileges.</a>
1.294 david 1002: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1003: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1004: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1005: Programs using the fts routines can be tricked into changing
1006: into the wrong directory.</a>
1.294 david 1007: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1008: Sendmail signal handlers contain unsafe code,
1009: leading to numerous race conditions.</a>
1.294 david 1010: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1011: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1012: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1013: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1014: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1015: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1016: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1017: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1018: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1019: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1020: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1021: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1022: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1023: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1024: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1025: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1026: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1027: rnd(4) did not use all of its input when written to.</a>
1.294 david 1028: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1029: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1030: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1031: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1032: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1033: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1034: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1035: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1036: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1037: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1038: </ul>
1039:
1040: <p>
1041: <li>
1.288 matthieu 1042: <a name="27"></a>
1.124 deraadt 1043:
1.294 david 1044: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1045: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1046: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1047: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1048:
1049: <p>
1050: <ul>
1.294 david 1051: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1052: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1053: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1054: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1055: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1056: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1057: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1058: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1059: (patch included)</a>
1.294 david 1060: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1061: X11 libraries have 2 potential overflows in xtrans code.
1062: (patch included)</a>
1.294 david 1063: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1064: Apache mod_rewrite and mod_vhost_alias modules could expose files
1065: on the server in certain configurations if used.
1066: (patch included)</a>
1.294 david 1067: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1068: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1069: TERMPATH and TERMCAP environment variables as it should.
1070: (patch included)</a>
1.294 david 1071: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1072: There are printf-style format string bugs in several privileged
1073: programs. (patch included)</a>
1.294 david 1074: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1075: libcurses honored terminal descriptions in the $HOME/.terminfo
1076: directory as well as in the TERMCAP environment variable for
1077: setuid and setgid applications.
1.146 deraadt 1078: (patch included)</a>
1.294 david 1079: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1080: A format string vulnerability exists in talkd(8).
1081: (patch included)</a>
1.294 david 1082: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1083: A format string vulnerability exists in the pw_error() function of the
1084: libutil library, yielding localhost root through chpass(1).
1085: (patch included)</a>
1.294 david 1086: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1087: Bad ESP/AH packets could cause a crash under certain conditions.
1088: (patch included)</a>
1.294 david 1089: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1090: A format string vulnerability (localhost root) exists in xlock(1).
1091: (patch included)</a>
1.294 david 1092: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1093: Various bugs found in X11 libraries have various side effects, almost
1094: completely denial of service in OpenBSD.
1095: (patch included)</a>
1.294 david 1096: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1097: Just like pretty much all the other unix ftp daemons
1098: on the planet, ftpd had a remote root hole in it.
1099: Luckily, ftpd was not enabled by default.
1.137 deraadt 1100: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1101: (patch included)</a>
1.294 david 1102: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1103: Mopd, very rarely used, contained some buffer overflows.
1104: (patch included)</a>
1.294 david 1105: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1106: libedit would check for a <b>.editrc</b> file in the current
1107: directory. Not known to be a real security issue, but a patch
1108: is available anyways.
1109: (patch included)</a>
1.294 david 1110: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1111: A serious bug in dhclient(8) could allow strings from a
1112: malicious dhcp server to be executed in the shell as root.
1113: (patch included)</a>
1.294 david 1114: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1115: A serious bug in isakmpd(8) policy handling wherein
1116: policy verification could be completely bypassed in isakmpd.
1117: (patch included)</a>
1.294 david 1118: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1119: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1120: should not be used, and results in security problems on
1121: other operating systems.</a>
1.294 david 1122: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1123: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1124: (patch included)</a>
1.294 david 1125: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1126: Improper use of ipf <i>keep-state</i> rules can result
1127: in firewall rules being bypassed. (patch included)</a>
1128:
1.124 deraadt 1129: </ul>
1130:
1131: <p>
1132: <li>
1.288 matthieu 1133: <a name="26"></a>
1.119 deraadt 1134:
1.294 david 1135: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1136: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1137: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1138: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1139:
1140: <p>
1141: <ul>
1.294 david 1142: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1143: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1144: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1145: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1146: Improper use of ipf <i>keep-state</i> rules can result
1147: in firewall rules being bypassed. (patch included)</a>
1.294 david 1148: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1149: xlockmore has a bug which a localhost attacker can use to gain
1150: access to the encrypted root password hash (which is normally
1.245 miod 1151: encoded using blowfish</a> (see
1.294 david 1152: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1153: crypt(3)</a>)
1.245 miod 1154: (patch included).
1.294 david 1155: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1156: Systems running with procfs enabled and mounted are
1157: vulnerable to a very tricky exploit. procfs is not
1158: mounted by default.
1159: (patch included).</a>
1.294 david 1160: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1161: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1162: thus exposing the system to a race where the aliases file
1163: did not exist.
1.119 deraadt 1164: (patch included).</a>
1.294 david 1165: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1166: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1167: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1168: A buffer overflow in the RSAREF code included in the
1169: USA version of libssl, is possibly exploitable in
1170: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1171: (patch included).<br></a>
1172: <strong>Update:</strong> Turns out that this was not exploitable
1173: in any of the software included in OpenBSD 2.6.
1.294 david 1174: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1175: Any user could change interface media configurations, resulting in
1176: a localhost denial of service attack.
1.121 deraadt 1177: (patch included).</a>
1.119 deraadt 1178: </ul>
1179:
1180: <p>
1181: <li>
1.288 matthieu 1182: <a name="25"></a>
1.106 deraadt 1183:
1.294 david 1184: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1185: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1186: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1187: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1188:
1.96 deraadt 1189: <p>
1.104 deraadt 1190: <ul>
1.294 david 1191: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1192: In cron(8), make sure argv[] is NULL terminated in the
1193: fake popen() and run sendmail as the user, not as root.
1194: (patch included).</a>
1.294 david 1195: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1196: filesystems had an overrun in their handling of uio_offset
1197: in their readdir() routines. (These filesystems are not
1198: enabled by default). (patch included).</a>
1.294 david 1199: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1200: when we execve() a new process. (patch included).</a>
1.294 david 1201: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1202: been handled by IPsec may be transmitted as cleartext.
1203: PF_KEY SA expirations may leak kernel resources.
1204: (patch included).</a>
1.294 david 1205: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1206: motd re-writing and change the find(1) to use -execdir
1207: (patch included).</a>
1.294 david 1208: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1209: users to chflags(2) or fchflags(2) on character or block devices
1210: which they may currently be the owner of (patch included).</a>
1.294 david 1211: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1212: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1213: </ul>
1214:
1.106 deraadt 1215: <p>
1216: <li>
1.288 matthieu 1217: <a name="24"></a>
1.235 miod 1218:
1.294 david 1219: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1220: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1221: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1222: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1223:
1.96 deraadt 1224: <p>
1.75 deraadt 1225: <ul>
1.294 david 1226: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1227: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1228: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1229: another kernel crash case caused by the <strong>crashme</strong>
1230: program (patch included).</a>
1.294 david 1231: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1232: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1233: (patch included).</a>
1.294 david 1234: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1235: existed in ping(8). (patch included).</a>
1.294 david 1236: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1237: the ipq, which could permit an attacker to cause a crash.
1238: (patch included).</a>
1.294 david 1239: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1240: kernel between accept(2) and select(2) could permit an attacker
1241: to hang sockets from remote.
1242: (patch included).</a>
1.294 david 1243: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1244: bog the machine excessively and cause problems.
1245: (patch included).</a>
1.294 david 1246: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1247: DDB interacted to possibly cause a crash.
1248: (patch included).</a>
1.294 david 1249: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1250: (patch included).</a>
1.294 david 1251: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1252: problem in bootpd(8). (patch included).</a>
1.294 david 1253: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1254: exploitable problem relating to environment variables in termcap
1255: and curses. (patch included).</a>
1.294 david 1256: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1257: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1258: </ul>
1259:
1.106 deraadt 1260: <p>
1261: <li>
1.288 matthieu 1262: <a name="23"></a>
1.235 miod 1263:
1.294 david 1264: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1265: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1266: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1267: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1268:
1.96 deraadt 1269: <p>
1.53 matthieu 1270: <ul>
1.294 david 1271: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1272: problem in bootpd(8). (patch included).</a>
1.294 david 1273: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1274: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1275: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1276: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1277: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1278: chpass(1) has a file descriptor leak which allows an
1279: attacker to modify /etc/master.passwd.</a>
1.294 david 1280: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1281: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1282: should not be executed with fd slots 0, 1, or 2 free.
1283: (patch included).</a>
1.294 david 1284: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1285: libraries (patches included).</a>
1.294 david 1286: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1287: processes too permissive (4th revision patch included).</a>
1.294 david 1288: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1289: of immutable and append-only file flags. (patch included).</a>
1.294 david 1290: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1291: if IPSEC is enabled (patch included).</a>
1.294 david 1292: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1293: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1294: </ul>
1.9 deraadt 1295:
1.106 deraadt 1296: <p>
1297: <li>
1.288 matthieu 1298: <a name="22"></a>
1.235 miod 1299:
1.294 david 1300: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1301: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1302: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1303: still exist in other operating systems. (The supplied patches are for
1304: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1305:
1.96 deraadt 1306: <p>
1.9 deraadt 1307: <ul>
1.294 david 1308: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1309: packets if IPSEC is enabled (patch included).</a>
1.294 david 1310: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1311: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1312: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1313: (patch included).</a>
1.294 david 1314: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1315: (patch included).</a>
1.294 david 1316: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1317: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1318: (patch included).</a>
1.294 david 1319: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1320: export (patch included).</a>
1.112 philen 1321: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1322: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1323: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1324: Acceptance.</a>
1.294 david 1325: A patch is available <a href="errata22.html#sourceroute">here</a>.
1326: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1327: flaw (patch included).</a>
1.294 david 1328: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1329: </ul>
1330:
1.106 deraadt 1331: <p>
1332: <li>
1.288 matthieu 1333: <a name="21"></a>
1.235 miod 1334:
1.294 david 1335: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1336: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1337: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1338: exist in other operating systems. (If you are running OpenBSD 2.1, we
1339: would strongly recommend an upgrade to the newest release, as this
1340: patch list only attempts at fixing the most important security
1341: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1342: security problems. Many of those problems were solved in ways which
1343: make it hard for us to provide patches).
1344:
1.96 deraadt 1345: <p>
1.52 deraadt 1346: <ul>
1.112 philen 1347: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1348: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1349: (patch included)</a>
1.112 philen 1350: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1351: </ul>
1.51 deraadt 1352:
1.106 deraadt 1353: <p>
1354: <li>
1.288 matthieu 1355: <a name="20"></a>
1.235 miod 1356:
1.294 david 1357: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1358: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1359: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1360: exist in other operating systems. (If you are running OpenBSD 2.0, we
1361: commend you for being there back in the old days!, but you're really
1362: missing out if you don't install a new version!)
1363:
1364: <p>
1365: <ul>
1.112 philen 1366: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1367: resolver (patch included)</a>
1368: <li>Many others... if people can hunt them down, please let me know
1369: and we'll put them up here.
1370: </ul>
1.51 deraadt 1371: <p>
1.106 deraadt 1372:
1.288 matthieu 1373: <a name="watching"></a>
1.294 david 1374: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1375:
1.21 deraadt 1376: Since we take a proactive stance with security, we are continually
1377: finding and fixing new security problems. Not all of these problems
1.80 espie 1378: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1379: confirmed to be exploitable; many simple bugs we fix do turn out to
1380: have security consequences we could not predict. We do not have the
1381: time resources to make these changes available in the above format.<p>
1.21 deraadt 1382:
1383: Thus there are usually minor security fixes in the current source code
1384: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1385: guarantee that these problems are of minimal impact and unproven
1.44 ian 1386: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1387: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1388:
1.45 deraadt 1389: People who are really concerned with security can do a number of
1390: things:<p>
1.21 deraadt 1391:
1392: <ul>
1393: <li>If you understand security issues, watch our
1.294 david 1394: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1395: eye out for things which appear security related. Since
1.21 deraadt 1396: exploitability is not proven for many of the fixes we make,
1397: do not expect the relevant commit message to say "SECURITY FIX!".
1398: If a problem is proven and serious, a patch will be available
1399: here very shortly after.
1.161 horacio 1400: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1401: security-announce mailing list</a> which will notify you for every
1.186 ian 1402: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1403: and instruct you on how to patch the problem.
1.21 deraadt 1404: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1405: complete system build from time to time (read /usr/src/Makefile
1406: carefully). Users can make the assumption that the current
1407: source tree always has stronger security than the previous release.
1.45 deraadt 1408: However, building your own system from source code is not trivial;
1.265 miod 1409: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1410: transition between major releases.
1.115 ericj 1411: <li>Install a binary snapshot for your
1.80 espie 1412: architecture, which are made available fairly often. For
1.29 deraadt 1413: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1414: </ul>
1415:
1.9 deraadt 1416: <p>
1.288 matthieu 1417: <a name="reporting"></a>
1.294 david 1418: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1419:
1.5 deraadt 1420: <p> If you find a new security problem, you can mail it to
1.294 david 1421: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1422: <br>
1.5 deraadt 1423: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1424: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1425:
1.107 deraadt 1426: <p>
1.288 matthieu 1427: <a name="papers"></a>
1.294 david 1428: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1429:
1430: A number of papers have been written by OpenBSD team members, about security
1431: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1432: documents are available as follows.<p>
1.107 deraadt 1433:
1434: <ul>
1.113 deraadt 1435: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1436: <a href="events.html#usenix99">Usenix 1999</a>,
1437: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1438: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1439: <a href="papers/bcrypt-paper.ps">paper</a> and
1440: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1441: <p>
1442: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1443: <a href="events.html#usenix99">Usenix 1999</a>,
1444: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1445: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1446: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1447: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1448: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1449: <a href="papers/crypt-paper.ps">paper</a> and
1450: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1451: <p>
1452: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1453: <a href="events.html#usenix99">Usenix 1999</a>,
1454: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1455: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1456: <a href="papers/strlcpy-paper.ps">paper</a> and
1457: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1458: <p>
1.118 deraadt 1459: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1460: <a href="events.html#lisa99">LISA 1999</a>,
1461: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1462: <a href="papers/authgw-paper.ps">paper</a> and
1463: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1464: <p>
1.153 jufi 1465: <li>Encrypting Virtual Memory<br>
1.294 david 1466: <a href="events.html#sec2000">Usenix Security 2000</a>,
1467: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1468: <a href="papers/swapencrypt.ps">paper</a> and
1469: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1470: <p>
1.107 deraadt 1471: </ul>
1.294 david 1472: </ul>
1.106 deraadt 1473:
1.2 deraadt 1474: <hr>
1.294 david 1475: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1476: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1477: <br>
1.327 ! brad 1478: <small>$OpenBSD: security.html,v 1.326 2006/08/25 15:56:06 brad Exp $</small>
1.1 deraadt 1479:
1.24 deraadt 1480: </body>
1481: </html>
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