Annotation of www/security.html, Revision 1.320
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1.210 jsyn 16: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
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>,
60: <a href="#38">3.8</a>.
1.114 philen 61: </td>
62: </tr>
63: </table>
1.56 deraadt 64: <hr>
65:
1.294 david 66: <a name="goals"></a>
1.278 deraadt 67: <ul>
1.294 david 68: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 69:
1.14 deraadt 70: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 71: ONE in the industry for security (if we are not already there). Our
72: open software development model permits us to take a more
73: uncompromising view towards increased security than Sun, SGI, IBM, HP,
74: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 75: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 76: cryptography</a>, we are able to take cryptographic approaches towards
77: fixing security problems.<p>
1.18 deraadt 78:
1.288 matthieu 79: <a name="disclosure"></a>
1.294 david 80: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 81:
1.45 deraadt 82: Like many readers of the
1.196 jufi 83: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 84: BUGTRAQ mailing list</a>,
1.106 deraadt 85: we believe in full disclosure of security problems. In the
86: operating system arena, we were probably the first to embrace
87: the concept. Many vendors, even of free software, still try
88: to hide issues from their users.<p>
89:
90: Security information moves very fast in cracker circles. On the other
91: hand, our experience is that coding and releasing of proper security
92: fixes typically requires about an hour of work -- very fast fix
93: turnaround is possible. Thus we think that full disclosure helps the
94: people who really care about security.<p>
95:
1.288 matthieu 96: <a name="process"></a>
1.294 david 97: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 98:
1.12 deraadt 99: Our security auditing team typically has between six and twelve
1.45 deraadt 100: members who continue to search for and fix new security holes. We
101: have been auditing since the summer of 1996. The process we follow to
102: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 103: every critical software component. We are not so much looking for
104: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 105: years later someone discovers the problem used to be a security
1.106 deraadt 106: issue, and we fixed it because it was just a bug, well, all the
107: better. Flaws have been found in just about every area of the system.
108: Entire new classes of security problems have been found during our
109: audit, and often source code which had been audited earlier needs
110: re-auditing with these new flaws in mind. Code often gets audited
111: multiple times, and by multiple people with different auditing
112: skills.<p>
1.12 deraadt 113:
1.94 deraadt 114: Some members of our security auditing team worked for Secure Networks,
115: the company that made the industry's premier network security scanning
116: software package Ballista (Secure Networks got purchased by Network
117: Associates, Ballista got renamed to Cybercop Scanner, and well...)
118: That company did a lot of security research, and thus fit in well
1.106 deraadt 119: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
120: colours since day 1.<p>
1.31 deraadt 121:
1.34 deraadt 122: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 123: In most cases we have found that the determination of exploitability
124: is not an issue. During our ongoing auditing process we find many
125: bugs, and endeavor to fix them even though exploitability is not
126: proven. We fix the bug, and we move on to find other bugs to fix. We
127: have fixed many simple and obvious careless programming errors in code
128: and only months later discovered that the problems were in fact
129: exploitable. (Or, more likely someone on
1.197 jufi 130: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 131: would report that other operating systems were vulnerable to a `newly
132: discovered problem', and then it would be discovered that OpenBSD had
133: been fixed in a previous release). In other cases we have been saved
134: from full exploitability of complex step-by-step attacks because we
135: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 136: managed such a success is the lpd advisory that Secure Networks put out.
137: <p>
1.29 deraadt 138:
1.288 matthieu 139: <a name="newtech"></a>
1.294 david 140: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 141:
142: As we audit source code, we often invent new ways of solving problems.
143: Sometimes these ideas have been used before in some random application
144: written somewhere, but perhaps not taken to the degree that we do.
145: <p>
146:
147: <ul>
148: <li>strlcpy() and strlcat()
149: <li>Memory protection purify
150: <ul>
151: <li>W^X
152: <li>.rodata segment
153: <li>Guard pages
154: <li>Randomized malloc()
155: <li>Randomized mmap()
156: <li>atexit() and stdio protection
157: </ul>
1.295 otto 158: <li>Privilege separation
1.278 deraadt 159: <li>Privilege revocation
160: <li>Chroot jailing
161: <li>New uids
162: <li>ProPolice
163: <li>... and others
164: </ul>
165: <p>
166:
1.294 david 167: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 168:
1.45 deraadt 169: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 170: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 171: commonplace in security forums like
1.197 jufi 172: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 173:
1.45 deraadt 174: The most intense part of our security auditing happened immediately
1.80 espie 175: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 176: over the last third of 1996 and first half of 1997. Thousands (yes,
177: thousands) of security issues were fixed rapidly over this year-long
178: period; bugs like the standard buffer overflows, protocol
179: implementation weaknesses, information gathering, and filesystem
180: races. Hence most of the security problems that we encountered were
181: fixed before our 2.1 release, and then a far smaller number needed
182: fixing for our 2.2 release. We do not find as many problems anymore,
183: it is simply a case of diminishing returns. Recently the security
184: problems we find and fix tend to be significantly more obscure or
185: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 186:
1.35 deraadt 187: <ul>
1.45 deraadt 188: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 189: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 190: to search for more complicated exploits, so we will too.
191: <li>Finding and fixing subtle flaws in complicated software is
192: a lot of fun.
1.35 deraadt 193: </ul>
1.106 deraadt 194: <p>
1.15 deraadt 195:
1.14 deraadt 196: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 197: to find and fix new security flaws.<p>
1.12 deraadt 198:
1.288 matthieu 199: <a name="default"></a>
1.294 david 200: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 201:
202: To ensure that novice users of OpenBSD do not need to become security
203: experts overnight (a viewpoint which other vendors seem to have), we
204: ship the operating system in a Secure by Default mode. All non-essential
205: services are disabled. As the user/administrator becomes more familiar
206: with the system, he will discover that he has to enable daemons and other
207: parts of the system. During the process of learning how to enable a new
208: service, the novice is more likely to learn of security considerations.<p>
209:
210: This is in stark contrast to the increasing number of systems that
211: ship with NFS, mountd, web servers, and various other services enabled
212: by default, creating instantaneous security problems for their users
213: within minutes after their first install.<p>
214:
1.288 matthieu 215: <a name="crypto"></a>
1.294 david 216: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 217:
218: And of course, since the OpenBSD project is based in Canada, it is possible
219: for us to integrate cryptography. For more information, read the page
1.116 deraadt 220: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 221:
1.294 david 222: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 223:
224: <li>
1.318 deraadt 225: <a name="38"></a>
226:
227: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
228: These are the OpenBSD 3.8 advisories -- all these problems are solved
229: in <a href=anoncvs.html>OpenBSD current</a> and the
230: <a href=stable.html>patch branch</a>.
231:
232: <p>
233: <ul>
1.320 ! brad 234: <li><a href="errata.html#ssh">Feb 12, 2006:
! 235: Josh Bressers has reported a weakness in OpenSSH caused due to the
! 236: insecure use of the system(3) function in scp(1) when performing copy
! 237: operations using filenames that are supplied by the user from the
! 238: command line.</a>
1.319 brad 239: <li><a href="errata.html#fd">Jan 5, 2006:
240: Do not allow users to trick suid programs into re-opening files via
241: /dev/fd.</a>
242: <li><a href="errata.html#perl">Jan 5, 2006:
243: A buffer overflow has been found in the Perl interpreter with the
244: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 245: </ul>
246:
247: <li>
1.312 david 248: <a name="37"></a>
249:
250: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
251: These are the OpenBSD 3.7 advisories -- all these problems are solved
252: in <a href=anoncvs.html>OpenBSD current</a> and the
253: <a href=stable.html>patch branch</a>.
254:
255: <p>
256: <ul>
1.320 ! brad 257: <li><a href="errata37.html#ssh">Feb 12, 2006:
! 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>
1.319 brad 262: <li><a href="errata37.html#fd">Jan 5, 2006:
263: Do not allow users to trick suid programs into re-opening files via
264: /dev/fd.</a>
265: <li><a href="errata37.html#perl">Jan 5, 2006:
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: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 269: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 270: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 271: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 272: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 273: Fix a race condition in sudo(8) that could allow a user
1.315 millert 274: to run arbitrary commands.</a>
1.318 deraadt 275: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 276: Fix a buffer overflow, memory leaks, and NULL pointer
277: dereference in cvs(1).</a>
1.312 david 278: </ul>
279:
280: <li>
1.301 miod 281: <a name="36"></a>
282:
283: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
284: These are the OpenBSD 3.6 advisories -- all these problems are solved
285: in <a href=anoncvs.html>OpenBSD current</a> and the
286: <a href=stable.html>patch branch</a>.
287:
288: <p>
1.302 markus 289: <ul>
1.317 millert 290: <li><a href="errata36.html#libz2">Jul 21, 2005:
291: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 292: <li><a href="errata36.html#libz">Jul 6, 2005:
293: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 294: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 295: Fix a race condition in sudo(8) that could allow a user
1.315 millert 296: to run arbitrary commands.</a>
1.311 deraadt 297: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 298: Fix a buffer overflow, memory leaks, and NULL pointer
299: dereference in cvs(1).</a>
1.311 deraadt 300: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 301: Due to buffer overflows in telnet(1), a malicious
302: server or man-in-the-middle attack could allow
303: execution of arbitrary code with the privileges of
304: the user invoking telnet(1).</a>
1.311 deraadt 305: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 306: More stringent checking should be done in the copy(9)
307: functions to prevent their misuse.</a>
1.311 deraadt 308: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 309: More stringent checking should be done in the copy(9)
310: functions to prevent their misuse.</a>
1.311 deraadt 311: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 312: httpd(8)'s mod_include module fails to properly validate
313: the length of user supplied tag strings prior to copying
1.305 brad 314: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 315: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 316: On systems running isakmpd(8) it is possible for a local
317: user to cause kernel memory corruption and system panic by
1.303 markus 318: setting ipsec(4) credentials on a socket.</a>
1.302 markus 319: </ul>
1.301 miod 320:
321: <p>
1.314 miod 322: OpenBSD 3.5 and earlier releases are not supported anymore. The following
323: paragraphs only list advisories issued while they were maintained; these
324: releases are likely to be affected by the advisories for more recent releases.
325: <br>
326:
1.301 miod 327: <li>
1.288 matthieu 328: <a name="35"></a>
1.279 deraadt 329:
1.294 david 330: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 331: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 332: in <a href="anoncvs.html">OpenBSD current</a>. The
333: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
334: you should update your machine.
1.279 deraadt 335:
336: <p>
337: <ul>
1.310 brad 338: <li><a href="errata35.html#cvs4">Apr 28, 2005:
339: Fix a buffer overflow, memory leaks, and NULL pointer
340: dereference in cvs(1).</a>
1.309 brad 341: <li><a href="errata35.html#telnet">Mar 30, 2005:
342: Due to buffer overflows in telnet(1), a malicious
343: server or man-in-the-middle attack could allow
344: execution of arbitrary code with the privileges of
345: the user invoking telnet(1).</a>
1.308 brad 346: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 347: More stringent checking should be done in the copy(9)
348: functions to prevent their misuse.</a>
1.306 brad 349: <li><a href="errata35.html#locore">Feb 28, 2005:
350: More stringent checking should be done in the copy(9)
351: functions to prevent their misuse.</a>
1.304 brad 352: <li><a href="errata35.html#httpd3">Jan 12, 2005:
353: httpd(8)'s mod_include module fails to properly validate
354: the length of user supplied tag strings prior to copying
1.305 brad 355: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 356: <li><a href="errata35.html#pfkey">Dec 14, 2004:
357: On systems running isakmpd(8) it is possible for a local
358: user to cause kernel memory corruption and system panic by
1.303 markus 359: setting ipsec(4) credentials on a socket.</a>
1.301 miod 360: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 361: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 362: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 363: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 364: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 365: httpd(8)'s mod_rewrite module can be made to write one zero byte in
366: an arbitrary memory position outside of a char array, causing a DoS
367: or possibly buffer overflows.</a>
1.301 miod 368: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 369: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 370: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 371: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 372: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 373: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 374: Multiple remote vulnerabilities have been found in the cvs(1)
375: server which can be used by CVS clients to crash or execute
1.293 brad 376: arbitrary code on the server.</a>
1.301 miod 377: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 378: kdc(8) performs inadequate checking of request fields, leading
379: to the possibility of principal impersonation from other
380: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 381: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 382: xdm(1) ignores the requestPort resource and creates a
1.293 brad 383: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 384: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 385: A buffer overflow in the cvs(1) server has been found,
386: which can be used by CVS clients to execute arbitrary code on
1.293 brad 387: the server.</a>
1.301 miod 388: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 389: Integer overflow problems were found in procfs, allowing
1.293 brad 390: reading of arbitrary kernel memory.</a>
1.301 miod 391: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 392: Pathname validation problems have been found in cvs(1),
393: allowing clients and servers access to files outside the
1.293 brad 394: repository or local CVS tree.</a>
1.279 deraadt 395: </ul>
396:
397: <p>
398: <li>
1.288 matthieu 399: <a name="34"></a>
1.261 david 400:
1.294 david 401: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 402: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 403: in <a href="anoncvs.html">OpenBSD current</a>. The
404: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
405: you should update your machine.
1.261 david 406: <p>
407: <ul>
1.302 markus 408: <li><a href="errata34.html#pfkey">Dec 14, 2004:
409: On systems running isakmpd(8) it is possible for a local
410: user to cause kernel memory corruption and system panic by
1.303 markus 411: setting ipsec(4) credentials on a socket.</a>
1.298 brad 412: <li><a href="errata34.html#xpm">Sep 16, 2004:
413: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 414: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
415: httpd(8)'s mod_rewrite module can be made to write one zero byte in
416: an arbitrary memory position outside of a char array, causing a DoS
417: or possibly buffer overflows.</a>
1.294 david 418: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 419: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 420: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 421: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 422: an attacker can delete IPsec tunnels at will.</a>
1.294 david 423: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 424: Multiple remote vulnerabilities have been found in the cvs(1)
425: server which can be used by CVS clients to crash or execute
1.293 brad 426: arbitrary code on the server.</a>
1.294 david 427: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 428: kdc(8) performs inadequate checking of request fields, leading
429: to the possibility of principal impersonation from other
430: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 431: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 432: A buffer overflow in the cvs(1) server has been found,
433: which can be used by CVS clients to execute arbitrary code on
434: the server.</a>
1.294 david 435: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 436: Integer overflow problems were found in procfs, allowing
437: reading of arbitrary kernel memory.</a>
1.294 david 438: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 439: Pathname validation problems have been found in cvs(1),
440: allowing clients and servers access to files outside the
441: repository or local CVS tree.</a>
1.294 david 442: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 443: A missing check for a NULL-pointer dereference may allow a
1.281 otto 444: remote attacker to crash applications using OpenSSL.</a>
1.294 david 445: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 446: Defects in the payload validation and processing functions of
447: isakmpd have been discovered. An attacker could send malformed
448: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 449: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 450: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
451: access module, using IP addresses without a netmask on big endian
452: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 453: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 454: An IPv6 MTU handling problem exists that could be used by an
455: attacker to cause a denial of service attack.</a>
1.294 david 456: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 457: A reference counting bug in shmat(2) could be used to write to
458: kernel memory under certain circumstances.</a>
1.294 david 459: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 460: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 461: by Thomas Walpuski.</a>
1.294 david 462: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 463: It may be possible for a local user to overrun the stack in
464: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 465: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 466: The use of certain ASN.1 encodings or malformed public keys may
467: allow an attacker to mount a denial of service attack against
468: applications linked with ssl(3).</a>
1.261 david 469: </ul>
470:
471: <li>
1.288 matthieu 472: <a name="33"></a>
1.246 deraadt 473:
1.294 david 474: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 475: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 476: in <a href="anoncvs.html">OpenBSD current</a>. The
477: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 478: you should update your machine.
1.246 deraadt 479: <p>
480: <ul>
1.294 david 481: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 482: Pathname validation problems have been found in cvs(1),
483: allowing clients and servers access to files outside the
484: repository or local CVS tree.</a>
1.294 david 485: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 486: A missing check for a NULL-pointer dereference may allow a
1.281 otto 487: remote attacker to crash applications using OpenSSL.</a>
1.294 david 488: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 489: Defects in the payload validation and processing functions of
490: isakmpd have been discovered. An attacker could send malformed
491: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 492: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 493: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
494: access module, using IP addresses without a netmask on big endian
495: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 496: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 497: An IPv6 MTU handling problem exists that could be used by an
498: attacker to cause a denial of service attack.</a>
1.294 david 499: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 500: A reference counting bug in shmat(2) could be used to write to
501: kernel memory under certain circumstances.</a>
1.294 david 502: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 503: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 504: by Thomas Walpuski.</a>
1.294 david 505: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 506: It may be possible for a local user to execute arbitrary code
507: resulting in escalation of privileges due to a stack overrun
508: in compat_ibcs2(8).</a>
1.294 david 509: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 510: The use of certain ASN.1 encodings or malformed public keys may
511: allow an attacker to mount a denial of service attack against
512: applications linked with ssl(3).</a>
1.294 david 513: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 514: Access of freed memory in pf(4) could be used to
1.260 margarid 515: remotely panic a machine using scrub rules.</a>
1.294 david 516: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 517: A buffer overflow in the address parsing in
518: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 519: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 520: OpenSSH versions prior to 3.7 contains a buffer management error
521: that is potentially exploitable.</a>
1.294 david 522: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 523: Root may be able to reduce the security level by taking advantage of
524: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 525: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 526: An improper bounds check in the kernel may allow a local user
527: to panic the kernel.</a>
1.294 david 528: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 529: An off-by-one error exists in the C library function realpath(3)
530: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 531: </ul>
532:
1.265 miod 533:
1.247 david 534: <p>
1.246 deraadt 535: <li>
1.288 matthieu 536: <a name="32"></a>
1.224 deraadt 537:
1.294 david 538: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 539: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 540: in <a href="anoncvs.html">OpenBSD current</a>. The
541: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 542: you should update your machine.
1.224 deraadt 543: <p>
544: <ul>
1.294 david 545: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 546: The use of certain ASN.1 encodings or malformed public keys may
547: allow an attacker to mount a denial of service attack against
548: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 549: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 550: Access of freed memory in pf(4) could be used to
1.260 margarid 551: remotely panic a machine using scrub rules.</a>
1.294 david 552: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 553: A buffer overflow in the address parsing in
554: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 555: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 556: OpenSSH versions prior to 3.7 contains a buffer management error
557: that is potentially exploitable.</a>
1.294 david 558: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 559: Fix for a potential security issue in
560: sendmail(8) with respect to DNS maps.</a>
1.294 david 561: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 562: An off-by-one error exists in the C library function realpath(3)
563: may allow an attacker to gain escalated privileges.</a>
1.294 david 564: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 565: A buffer overflow in the address parsing in
566: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 567: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 568: A cryptographic weaknesses in the Kerberos v4 protocol can be
569: exploited on Kerberos v5 as well.</a>
1.294 david 570: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 571: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 572: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 573: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 574: Various SSL and TLS operations in OpenSSL are vulnerable to
575: timing attacks.</a>
1.294 david 576: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 577: A buffer overflow in lprm(1) may allow an attacker to elevate
578: privileges to user daemon.</a>.
1.294 david 579: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 580: A buffer overflow in the envelope comments processing in
581: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 582: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 583: httpd(8) leaks file inode numbers via ETag header as well as
584: child PIDs in multipart MIME boundary generation. This could
585: lead, for example, to NFS exploitation because it uses inode
586: numbers as part of the file handle.</a>
1.294 david 587: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 588: In ssl(8) an information leak can occur via timing by performing
589: a MAC computation even if incorrect block cipher padding has
590: been found, this is a countermeasure. Also, check for negative
591: sizes, in allocation routines.</a>
1.294 david 592: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 593: A double free exists in cvs(1) that could lead to privilege
594: escalation for cvs configurations where the cvs command is
1.233 margarid 595: run as a privileged user.</a>
1.294 david 596: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 597: A buffer overflow exists in named(8) that could lead to a
598: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 599: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 600: A logic error in the pool kernel memory allocator could cause
601: memory corruption in low-memory situations, causing the system
602: to crash.</a>
1.294 david 603: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 604: An attacker can bypass smrsh(8)'s restrictions and execute
605: arbitrary commands with the privileges of his own account.</a>
1.294 david 606: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 607: Network bridges running pf with scrubbing enabled could cause
608: mbuf corruption, causing the system to crash.</a>
1.294 david 609: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 610: A buffer overflow can occur in the kadmind(8) daemon, leading
611: to possible remote crash or exploit.</a>
1.224 deraadt 612: </ul>
613:
1.227 miod 614: <p>
615: <li>
1.288 matthieu 616: <a name="31"></a>
1.203 deraadt 617:
1.294 david 618: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 619: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 620: in <a href="anoncvs.html">OpenBSD current</a>. The
621: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 622: you should update your machine.
1.203 deraadt 623:
624: <p>
625: <ul>
1.294 david 626: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 627: A buffer overflow in the address parsing in
628: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 629: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 630: A cryptographic weaknesses in the Kerberos v4 protocol can be
631: exploited on Kerberos v5 as well.</a>
1.294 david 632: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 633: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 634: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 635: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 636: Various SSL and TLS operations in OpenSSL are vulnerable to
637: timing attacks.</a>
1.294 david 638: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 639: A buffer overflow in lprm(1) may allow an attacker to gain
640: root privileges.</a>
1.294 david 641: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 642: A buffer overflow in the envelope comments processing in
643: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 644: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 645: In ssl(8) an information leak can occur via timing by performing
646: a MAC computation even if incorrect block cipher padding has
647: been found, this is a countermeasure. Also, check for negative
648: sizes, in allocation routines.</a>
1.294 david 649: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 650: A double free exists in cvs(1) that could lead to privilege
651: escalation for cvs configurations where the cvs command is
1.294 david 652: run as a privileged user</a>.
653: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 654: A buffer overflow exists in named(8) that could lead to a
655: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 656: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 657: Incorrect argument checking in the getitimer(2) system call
658: may allow an attacker to crash the system.</a>
1.294 david 659: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 660: An attacker can bypass smrsh(8)'s restrictions and execute
661: arbitrary commands with the privileges of his own account.</a>
1.294 david 662: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 663: A buffer overflow can occur in the kadmind(8) daemon, leading
664: to possible remote crash or exploit.</a>
1.294 david 665: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 666: Incorrect argument checking in the setitimer(2) system call
667: may allow an attacker to write to kernel memory.</a>
1.294 david 668: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 669: An insufficient boundary check in the select system call
1.220 miod 670: allows an attacker to overwrite kernel memory and execute arbitrary code
671: in kernel context.</a>
1.294 david 672: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 673: Several remote buffer overflows can occur in the SSL2 server and SSL3
674: client of the ssl(8) library, as in the ASN.1 parser code in the
675: crypto(3) library, all of them being potentially remotely
676: exploitable.</a>
1.294 david 677: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 678: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
679: possible remote crash.</a>
1.294 david 680: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 681: A race condition exists in the pppd(8) daemon which may cause it to
682: alter the file permissions of an arbitrary file.</a>
1.294 david 683: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 684: Receiving IKE payloads out of sequence can cause isakmpd(8) to
685: crash.</a>
1.294 david 686: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 687: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 688: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 689: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 690: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 691: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 692: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 693: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 694: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 695: input validation error that can result in an integer overflow and
696: privilege escalation.</a>
1.294 david 697: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 698: A buffer overflow can occur during the interpretation of chunked
699: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 700: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 701: Under certain conditions, on systems using YP with netgroups
702: in the password database, it is possible that sshd(8) does
703: ACL checks for the requested user name but uses the password
704: database entry of a different user for authentication. This
705: means that denied users might authenticate successfully
706: while permitted users could be locked out.</a>
1.294 david 707: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 708: A race condition exists that could defeat the kernel's
709: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 710: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 711: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 712: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 713: A local user can gain super-user privileges due to a buffer
714: overflow in sshd(8) if AFS has been configured on the system
715: or if KerberosTgtPassing or AFSTokenPassing has been enabled
716: in the sshd_config file.</a>
1.203 deraadt 717: </ul>
718:
1.235 miod 719: <p>
1.203 deraadt 720: <li>
1.288 matthieu 721: <a name="30"></a>
1.187 deraadt 722:
1.294 david 723: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 724: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 725: in <a href="anoncvs.html">OpenBSD current</a>. The
726: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 727: you should update your machine.
1.187 deraadt 728:
729: <p>
730: <ul>
1.294 david 731: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 732: A buffer overflow exists in named(8) that could lead to a
733: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 734: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 735: Incorrect argument checking in the getitimer(2) system call
736: may allow an attacker to crash the system.</a>
1.294 david 737: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 738: An attacker can bypass smrsh(8)'s restrictions and execute
739: arbitrary commands with the privileges of his own account.</a>
1.294 david 740: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 741: A buffer overflow can occur in the kadmind(8) daemon, leading
742: to possible remote crash or exploit.</a>
1.294 david 743: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 744: Incorrect argument checking in the setitimer(2) system call
745: may allow an attacker to write to kernel memory.</a>
1.294 david 746: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 747: An insufficient boundary check in the select and poll system calls
748: allows an attacker to overwrite kernel memory and execute arbitrary code
749: in kernel context.</a>
1.294 david 750: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 751: Several remote buffer overflows can occur in the SSL2 server and SSL3
752: client of the ssl(8) library, as in the ASN.1 parser code in the
753: crypto(3) library, all of them being potentially remotely
754: exploitable.</a>
1.294 david 755: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 756: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
757: possible remote crash.</a>
1.294 david 758: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 759: A race condition exists in the pppd(8) daemon which may cause it to
760: alter the file permissions of an arbitrary file.</a>
1.294 david 761: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 762: Receiving IKE payloads out of sequence can cause isakmpd(8) to
763: crash.</a>
1.294 david 764: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 765: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 766: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 767: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 768: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 769: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 770: input validation error that can result in an integer overflow and
771: privilege escalation.</a>
1.294 david 772: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 773: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 774: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 775: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 776: A buffer overflow can occur during the interpretation of chunked
777: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 778: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 779: A race condition exists that could defeat the kernel's
780: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 781: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 782: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 783: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 784: A local user can gain super-user privileges due to a buffer
785: overflow in sshd(8) if AFS has been configured on the system
786: or if KerberosTgtPassing or AFSTokenPassing has been enabled
787: in the sshd_config file.</a>
1.294 david 788: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 789: The mail(1) was interpreting tilde escapes even when invoked
790: in non-interactive mode. As mail(1) is called as root from cron,
791: this can lead to a local root compromise.</a>
1.294 david 792: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 793: Under certain conditions, on systems using YP with netgroups in
794: the password database, it is possible for the rexecd(8) and rshd(8)
795: daemons to execute a shell from a password database entry for a
796: different user. Similarly, atrun(8) may change to the wrong
797: home directory when running jobs.</a>
1.294 david 798: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 799: A potential double free() exists in the zlib library;
800: this is not exploitable on OpenBSD.
801: The kernel also contains a copy of zlib; it is not
802: currently known if the kernel zlib is exploitable.</a>
1.294 david 803: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 804: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 805: may allow a local user to gain super-user privileges.</a>
1.294 david 806: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 807: A race condition between the ptrace(2) and execve(2) system calls
808: allows an attacker to modify the memory contents of suid/sgid
809: processes which could lead to compromise of the super-user account.</a>
1.294 david 810: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 811: There is a security hole in sudo(8) that can be exploited
812: when the Postfix sendmail replacement is installed that may
813: allow an attacker on the local host to gain root privileges.</a>
1.294 david 814: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 815: An attacker can trick a machine running the lpd daemon into
816: creating new files in the root directory from a machine with
817: remote line printer access.</a>
1.294 david 818: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 819: The vi.recover script can be abused in such a way as
820: to cause arbitrary zero-length files to be removed.</a>
1.294 david 821: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 822: pf(4) was incapable of dealing with certain ipv6 icmp packets,
823: resulting in a crash.</a>
1.294 david 824: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 825: A security hole that may allow an attacker to partially authenticate
826: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 827: </ul>
828:
829: <p>
830: <li>
1.288 matthieu 831: <a name="29"></a>
1.173 deraadt 832:
1.294 david 833: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 834: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 835: in <a href="anoncvs.html">OpenBSD current</a>. The
836: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 837: you should update your machine.
838:
1.173 deraadt 839:
840: <p>
841: <ul>
1.294 david 842: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 843: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 844: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 845: A race condition exists that could defeat the kernel's
846: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 847: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 848: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 849: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 850: A local user can gain super-user privileges due to a buffer
851: overflow in sshd(8) if AFS has been configured on the system
852: or if KerberosTgtPassing or AFSTokenPassing has been enabled
853: in the sshd_config file.</a>
1.294 david 854: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 855: The mail(1) was interpreting tilde escapes even when invoked
856: in non-interactive mode. As mail(1) is called as root from cron,
857: this can lead to a local root compromise.</a>
1.294 david 858: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 859: A potential double free() exists in the zlib library;
860: this is not exploitable on OpenBSD.
861: The kernel also contains a copy of zlib; it is not
862: currently known if the kernel zlib is exploitable.</a>
1.294 david 863: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 864: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 865: may allow a local user to gain super-user privileges.</a>
1.294 david 866: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 867: A race condition between the ptrace(2) and execve(2) system calls
868: allows an attacker to modify the memory contents of suid/sgid
869: processes which could lead to compromise of the super-user account.</a>
1.294 david 870: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 871: There is a security hole in sudo(8) that can be exploited
872: when the Postfix sendmail replacement is installed that may
873: allow an attacker on the local host to gain root privileges.</a>
1.294 david 874: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 875: An attacker can trick a machine running the lpd daemon into
876: creating new files in the root directory from a machine with
877: remote line printer access.</a>
1.294 david 878: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 879: The vi.recover script can be abused in such a way as
880: to cause arbitrary zero-length files to be removed.</a>
1.294 david 881: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 882: A security hole exists in uuxqt(8) that may allow an
883: attacker to gain root privileges.</a>
1.294 david 884: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 885: A security hole exists in lpd(8) that may allow an
886: attacker to gain root privileges if lpd is running.</a>
1.294 david 887: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 888: A security hole exists in sendmail(8) that may allow an
889: attacker on the local host to gain root privileges.</a>
1.294 david 890: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 891: A kernel buffer overflow in the NFS code can be used to execute
892: arbitrary code by users with mount privileges (only root by
1.181 millert 893: default).</a>
1.294 david 894: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 895: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 896: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 897: sshd(8) allows users to delete arbitrary files named "cookies"
898: if X11 forwarding is enabled. X11 forwarding is disabled
899: by default.</a>
1.294 david 900: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 901: Programs using the fts routines can be tricked into changing
902: into the wrong directory.</a>
1.294 david 903: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 904: Sendmail signal handlers contain unsafe code,
905: leading to numerous race conditions.</a>
1.173 deraadt 906: </ul>
907:
908: <p>
909: <li>
1.288 matthieu 910: <a name="28"></a>
1.152 deraadt 911:
1.294 david 912: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 913: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 914: in <a href="anoncvs.html">OpenBSD current</a>. The
915: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 916: you should update your machine.
917:
1.152 deraadt 918:
919: <p>
920: <ul>
1.294 david 921: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 922: A security hole exists in uuxqt(8) that may allow an
923: attacker to gain root privileges.</a>
1.294 david 924: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 925: A security hole exists in lpd(8) that may allow an
926: attacker to gain root privileges if lpd is running.</a>
1.294 david 927: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 928: A security hole exists in sendmail(8) that may allow an
929: attacker on the local host to gain root privileges.</a>
1.294 david 930: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 931: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 932: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 933: Programs using the fts routines can be tricked into changing
934: into the wrong directory.</a>
1.294 david 935: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 936: Sendmail signal handlers contain unsafe code,
937: leading to numerous race conditions.</a>
1.294 david 938: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 939: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 940: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 941: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 942: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 943: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 944: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 945: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 946: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 947: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 948: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 949: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 950: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 951: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 952: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 953: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 954: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 955: rnd(4) did not use all of its input when written to.</a>
1.294 david 956: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 957: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 958: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 959: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 960: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 961: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 962: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 963: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 964: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 965: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 966: </ul>
967:
968: <p>
969: <li>
1.288 matthieu 970: <a name="27"></a>
1.124 deraadt 971:
1.294 david 972: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 973: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 974: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 975: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
976:
977: <p>
978: <ul>
1.294 david 979: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 980: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 981: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 982: a buffer overflow was fixed in sudo(8).</a>
1.294 david 983: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 984: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 985: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 986: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
987: (patch included)</a>
1.294 david 988: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 989: X11 libraries have 2 potential overflows in xtrans code.
990: (patch included)</a>
1.294 david 991: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 992: Apache mod_rewrite and mod_vhost_alias modules could expose files
993: on the server in certain configurations if used.
994: (patch included)</a>
1.294 david 995: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 996: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
997: TERMPATH and TERMCAP environment variables as it should.
998: (patch included)</a>
1.294 david 999: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1000: There are printf-style format string bugs in several privileged
1001: programs. (patch included)</a>
1.294 david 1002: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1003: libcurses honored terminal descriptions in the $HOME/.terminfo
1004: directory as well as in the TERMCAP environment variable for
1005: setuid and setgid applications.
1.146 deraadt 1006: (patch included)</a>
1.294 david 1007: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1008: A format string vulnerability exists in talkd(8).
1009: (patch included)</a>
1.294 david 1010: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1011: A format string vulnerability exists in the pw_error() function of the
1012: libutil library, yielding localhost root through chpass(1).
1013: (patch included)</a>
1.294 david 1014: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1015: Bad ESP/AH packets could cause a crash under certain conditions.
1016: (patch included)</a>
1.294 david 1017: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1018: A format string vulnerability (localhost root) exists in xlock(1).
1019: (patch included)</a>
1.294 david 1020: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1021: Various bugs found in X11 libraries have various side effects, almost
1022: completely denial of service in OpenBSD.
1023: (patch included)</a>
1.294 david 1024: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1025: Just like pretty much all the other unix ftp daemons
1026: on the planet, ftpd had a remote root hole in it.
1027: Luckily, ftpd was not enabled by default.
1.137 deraadt 1028: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1029: (patch included)</a>
1.294 david 1030: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1031: Mopd, very rarely used, contained some buffer overflows.
1032: (patch included)</a>
1.294 david 1033: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1034: libedit would check for a <b>.editrc</b> file in the current
1035: directory. Not known to be a real security issue, but a patch
1036: is available anyways.
1037: (patch included)</a>
1.294 david 1038: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1039: A serious bug in dhclient(8) could allow strings from a
1040: malicious dhcp server to be executed in the shell as root.
1041: (patch included)</a>
1.294 david 1042: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1043: A serious bug in isakmpd(8) policy handling wherein
1044: policy verification could be completely bypassed in isakmpd.
1045: (patch included)</a>
1.294 david 1046: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1047: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1048: should not be used, and results in security problems on
1049: other operating systems.</a>
1.294 david 1050: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1051: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1052: (patch included)</a>
1.294 david 1053: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1054: Improper use of ipf <i>keep-state</i> rules can result
1055: in firewall rules being bypassed. (patch included)</a>
1056:
1.124 deraadt 1057: </ul>
1058:
1059: <p>
1060: <li>
1.288 matthieu 1061: <a name="26"></a>
1.119 deraadt 1062:
1.294 david 1063: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1064: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1065: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1066: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1067:
1068: <p>
1069: <ul>
1.294 david 1070: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1071: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1072: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1073: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1074: Improper use of ipf <i>keep-state</i> rules can result
1075: in firewall rules being bypassed. (patch included)</a>
1.294 david 1076: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1077: xlockmore has a bug which a localhost attacker can use to gain
1078: access to the encrypted root password hash (which is normally
1.245 miod 1079: encoded using blowfish</a> (see
1.294 david 1080: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1081: crypt(3)</a>)
1.245 miod 1082: (patch included).
1.294 david 1083: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1084: Systems running with procfs enabled and mounted are
1085: vulnerable to a very tricky exploit. procfs is not
1086: mounted by default.
1087: (patch included).</a>
1.294 david 1088: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1089: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1090: thus exposing the system to a race where the aliases file
1091: did not exist.
1.119 deraadt 1092: (patch included).</a>
1.294 david 1093: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1094: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1095: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1096: A buffer overflow in the RSAREF code included in the
1097: USA version of libssl, is possibly exploitable in
1098: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1099: (patch included).<br></a>
1100: <strong>Update:</strong> Turns out that this was not exploitable
1101: in any of the software included in OpenBSD 2.6.
1.294 david 1102: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1103: Any user could change interface media configurations, resulting in
1104: a localhost denial of service attack.
1.121 deraadt 1105: (patch included).</a>
1.119 deraadt 1106: </ul>
1107:
1108: <p>
1109: <li>
1.288 matthieu 1110: <a name="25"></a>
1.106 deraadt 1111:
1.294 david 1112: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1113: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1114: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1115: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1116:
1.96 deraadt 1117: <p>
1.104 deraadt 1118: <ul>
1.294 david 1119: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1120: In cron(8), make sure argv[] is NULL terminated in the
1121: fake popen() and run sendmail as the user, not as root.
1122: (patch included).</a>
1.294 david 1123: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1124: filesystems had an overrun in their handling of uio_offset
1125: in their readdir() routines. (These filesystems are not
1126: enabled by default). (patch included).</a>
1.294 david 1127: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1128: when we execve() a new process. (patch included).</a>
1.294 david 1129: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1130: been handled by IPsec may be transmitted as cleartext.
1131: PF_KEY SA expirations may leak kernel resources.
1132: (patch included).</a>
1.294 david 1133: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1134: motd re-writing and change the find(1) to use -execdir
1135: (patch included).</a>
1.294 david 1136: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1137: users to chflags(2) or fchflags(2) on character or block devices
1138: which they may currently be the owner of (patch included).</a>
1.294 david 1139: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1140: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1141: </ul>
1142:
1.106 deraadt 1143: <p>
1144: <li>
1.288 matthieu 1145: <a name="24"></a>
1.235 miod 1146:
1.294 david 1147: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1148: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1149: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1150: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1151:
1.96 deraadt 1152: <p>
1.75 deraadt 1153: <ul>
1.294 david 1154: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1155: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1156: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1157: another kernel crash case caused by the <strong>crashme</strong>
1158: program (patch included).</a>
1.294 david 1159: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1160: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1161: (patch included).</a>
1.294 david 1162: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1163: existed in ping(8). (patch included).</a>
1.294 david 1164: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1165: the ipq, which could permit an attacker to cause a crash.
1166: (patch included).</a>
1.294 david 1167: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1168: kernel between accept(2) and select(2) could permit an attacker
1169: to hang sockets from remote.
1170: (patch included).</a>
1.294 david 1171: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1172: bog the machine excessively and cause problems.
1173: (patch included).</a>
1.294 david 1174: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1175: DDB interacted to possibly cause a crash.
1176: (patch included).</a>
1.294 david 1177: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1178: (patch included).</a>
1.294 david 1179: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1180: problem in bootpd(8). (patch included).</a>
1.294 david 1181: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1182: exploitable problem relating to environment variables in termcap
1183: and curses. (patch included).</a>
1.294 david 1184: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1185: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1186: </ul>
1187:
1.106 deraadt 1188: <p>
1189: <li>
1.288 matthieu 1190: <a name="23"></a>
1.235 miod 1191:
1.294 david 1192: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1193: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1194: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1195: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1196:
1.96 deraadt 1197: <p>
1.53 matthieu 1198: <ul>
1.294 david 1199: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1200: problem in bootpd(8). (patch included).</a>
1.294 david 1201: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1202: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1203: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1204: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1205: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1206: chpass(1) has a file descriptor leak which allows an
1207: attacker to modify /etc/master.passwd.</a>
1.294 david 1208: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1209: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1210: should not be executed with fd slots 0, 1, or 2 free.
1211: (patch included).</a>
1.294 david 1212: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1213: libraries (patches included).</a>
1.294 david 1214: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1215: processes too permissive (4th revision patch included).</a>
1.294 david 1216: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1217: of immutable and append-only file flags. (patch included).</a>
1.294 david 1218: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1219: if IPSEC is enabled (patch included).</a>
1.294 david 1220: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1221: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1222: </ul>
1.9 deraadt 1223:
1.106 deraadt 1224: <p>
1225: <li>
1.288 matthieu 1226: <a name="22"></a>
1.235 miod 1227:
1.294 david 1228: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1229: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1230: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1231: still exist in other operating systems. (The supplied patches are for
1232: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1233:
1.96 deraadt 1234: <p>
1.9 deraadt 1235: <ul>
1.294 david 1236: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1237: packets if IPSEC is enabled (patch included).</a>
1.294 david 1238: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1239: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1240: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1241: (patch included).</a>
1.294 david 1242: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1243: (patch included).</a>
1.294 david 1244: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1245: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1246: (patch included).</a>
1.294 david 1247: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1248: export (patch included).</a>
1.112 philen 1249: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1250: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1251: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1252: Acceptance.</a>
1.294 david 1253: A patch is available <a href="errata22.html#sourceroute">here</a>.
1254: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1255: flaw (patch included).</a>
1.294 david 1256: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1257: </ul>
1258:
1.106 deraadt 1259: <p>
1260: <li>
1.288 matthieu 1261: <a name="21"></a>
1.235 miod 1262:
1.294 david 1263: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1264: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1265: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1266: exist in other operating systems. (If you are running OpenBSD 2.1, we
1267: would strongly recommend an upgrade to the newest release, as this
1268: patch list only attempts at fixing the most important security
1269: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1270: security problems. Many of those problems were solved in ways which
1271: make it hard for us to provide patches).
1272:
1.96 deraadt 1273: <p>
1.52 deraadt 1274: <ul>
1.112 philen 1275: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1276: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1277: (patch included)</a>
1.112 philen 1278: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1279: </ul>
1.51 deraadt 1280:
1.106 deraadt 1281: <p>
1282: <li>
1.288 matthieu 1283: <a name="20"></a>
1.235 miod 1284:
1.294 david 1285: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1286: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1287: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1288: exist in other operating systems. (If you are running OpenBSD 2.0, we
1289: commend you for being there back in the old days!, but you're really
1290: missing out if you don't install a new version!)
1291:
1292: <p>
1293: <ul>
1.112 philen 1294: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1295: resolver (patch included)</a>
1296: <li>Many others... if people can hunt them down, please let me know
1297: and we'll put them up here.
1298: </ul>
1.51 deraadt 1299: <p>
1.106 deraadt 1300:
1.288 matthieu 1301: <a name="watching"></a>
1.294 david 1302: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1303:
1.21 deraadt 1304: Since we take a proactive stance with security, we are continually
1305: finding and fixing new security problems. Not all of these problems
1.80 espie 1306: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1307: confirmed to be exploitable; many simple bugs we fix do turn out to
1308: have security consequences we could not predict. We do not have the
1309: time resources to make these changes available in the above format.<p>
1.21 deraadt 1310:
1311: Thus there are usually minor security fixes in the current source code
1312: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1313: guarantee that these problems are of minimal impact and unproven
1.44 ian 1314: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1315: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1316:
1.45 deraadt 1317: People who are really concerned with security can do a number of
1318: things:<p>
1.21 deraadt 1319:
1320: <ul>
1321: <li>If you understand security issues, watch our
1.294 david 1322: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1323: eye out for things which appear security related. Since
1.21 deraadt 1324: exploitability is not proven for many of the fixes we make,
1325: do not expect the relevant commit message to say "SECURITY FIX!".
1326: If a problem is proven and serious, a patch will be available
1327: here very shortly after.
1.161 horacio 1328: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1329: security-announce mailing list</a> which will notify you for every
1.186 ian 1330: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1331: and instruct you on how to patch the problem.
1.21 deraadt 1332: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1333: complete system build from time to time (read /usr/src/Makefile
1334: carefully). Users can make the assumption that the current
1335: source tree always has stronger security than the previous release.
1.45 deraadt 1336: However, building your own system from source code is not trivial;
1.265 miod 1337: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1338: transition between major releases.
1.115 ericj 1339: <li>Install a binary snapshot for your
1.80 espie 1340: architecture, which are made available fairly often. For
1.29 deraadt 1341: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1342: </ul>
1343:
1.9 deraadt 1344: <p>
1.288 matthieu 1345: <a name="reporting"></a>
1.294 david 1346: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1347:
1.5 deraadt 1348: <p> If you find a new security problem, you can mail it to
1.294 david 1349: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1350: <br>
1.5 deraadt 1351: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1352: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1353:
1.107 deraadt 1354: <p>
1.288 matthieu 1355: <a name="papers"></a>
1.294 david 1356: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1357:
1358: A number of papers have been written by OpenBSD team members, about security
1359: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1360: documents are available as follows.<p>
1.107 deraadt 1361:
1362: <ul>
1.113 deraadt 1363: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1364: <a href="events.html#usenix99">Usenix 1999</a>,
1365: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1366: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1367: <a href="papers/bcrypt-paper.ps">paper</a> and
1368: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1369: <p>
1370: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1371: <a href="events.html#usenix99">Usenix 1999</a>,
1372: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1373: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1374: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1375: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1376: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1377: <a href="papers/crypt-paper.ps">paper</a> and
1378: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1379: <p>
1380: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1381: <a href="events.html#usenix99">Usenix 1999</a>,
1382: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1383: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1384: <a href="papers/strlcpy-paper.ps">paper</a> and
1385: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1386: <p>
1.118 deraadt 1387: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1388: <a href="events.html#lisa99">LISA 1999</a>,
1389: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1390: <a href="papers/authgw-paper.ps">paper</a> and
1391: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1392: <p>
1.153 jufi 1393: <li>Encrypting Virtual Memory<br>
1.294 david 1394: <a href="events.html#sec2000">Usenix Security 2000</a>,
1395: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1396: <a href="papers/swapencrypt.ps">paper</a> and
1397: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1398: <p>
1.107 deraadt 1399: </ul>
1.294 david 1400: </ul>
1.106 deraadt 1401:
1.2 deraadt 1402: <hr>
1.294 david 1403: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1404: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1405: <br>
1.320 ! brad 1406: <small>$OpenBSD: security.html,v 1.319 2006/01/05 05:34:08 brad Exp $</small>
1.1 deraadt 1407:
1.24 deraadt 1408: </body>
1409: </html>
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