Annotation of www/security.html, Revision 1.316
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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>,
59: <a href="#37">3.7</a>.
1.114 philen 60: </td>
61: </tr>
62: </table>
1.56 deraadt 63: <hr>
64:
1.294 david 65: <a name="goals"></a>
1.278 deraadt 66: <ul>
1.294 david 67: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 68:
1.14 deraadt 69: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 70: ONE in the industry for security (if we are not already there). Our
71: open software development model permits us to take a more
72: uncompromising view towards increased security than Sun, SGI, IBM, HP,
73: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 74: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 75: cryptography</a>, we are able to take cryptographic approaches towards
76: fixing security problems.<p>
1.18 deraadt 77:
1.288 matthieu 78: <a name="disclosure"></a>
1.294 david 79: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 80:
1.45 deraadt 81: Like many readers of the
1.196 jufi 82: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 83: BUGTRAQ mailing list</a>,
1.106 deraadt 84: we believe in full disclosure of security problems. In the
85: operating system arena, we were probably the first to embrace
86: the concept. Many vendors, even of free software, still try
87: to hide issues from their users.<p>
88:
89: Security information moves very fast in cracker circles. On the other
90: hand, our experience is that coding and releasing of proper security
91: fixes typically requires about an hour of work -- very fast fix
92: turnaround is possible. Thus we think that full disclosure helps the
93: people who really care about security.<p>
94:
1.288 matthieu 95: <a name="process"></a>
1.294 david 96: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 97:
1.12 deraadt 98: Our security auditing team typically has between six and twelve
1.45 deraadt 99: members who continue to search for and fix new security holes. We
100: have been auditing since the summer of 1996. The process we follow to
101: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 102: every critical software component. We are not so much looking for
103: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 104: years later someone discovers the problem used to be a security
1.106 deraadt 105: issue, and we fixed it because it was just a bug, well, all the
106: better. Flaws have been found in just about every area of the system.
107: Entire new classes of security problems have been found during our
108: audit, and often source code which had been audited earlier needs
109: re-auditing with these new flaws in mind. Code often gets audited
110: multiple times, and by multiple people with different auditing
111: skills.<p>
1.12 deraadt 112:
1.94 deraadt 113: Some members of our security auditing team worked for Secure Networks,
114: the company that made the industry's premier network security scanning
115: software package Ballista (Secure Networks got purchased by Network
116: Associates, Ballista got renamed to Cybercop Scanner, and well...)
117: That company did a lot of security research, and thus fit in well
1.106 deraadt 118: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
119: colours since day 1.<p>
1.31 deraadt 120:
1.34 deraadt 121: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 122: In most cases we have found that the determination of exploitability
123: is not an issue. During our ongoing auditing process we find many
124: bugs, and endeavor to fix them even though exploitability is not
125: proven. We fix the bug, and we move on to find other bugs to fix. We
126: have fixed many simple and obvious careless programming errors in code
127: and only months later discovered that the problems were in fact
128: exploitable. (Or, more likely someone on
1.197 jufi 129: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 130: would report that other operating systems were vulnerable to a `newly
131: discovered problem', and then it would be discovered that OpenBSD had
132: been fixed in a previous release). In other cases we have been saved
133: from full exploitability of complex step-by-step attacks because we
134: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 135: managed such a success is the lpd advisory that Secure Networks put out.
136: <p>
1.29 deraadt 137:
1.288 matthieu 138: <a name="newtech"></a>
1.294 david 139: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 140:
141: As we audit source code, we often invent new ways of solving problems.
142: Sometimes these ideas have been used before in some random application
143: written somewhere, but perhaps not taken to the degree that we do.
144: <p>
145:
146: <ul>
147: <li>strlcpy() and strlcat()
148: <li>Memory protection purify
149: <ul>
150: <li>W^X
151: <li>.rodata segment
152: <li>Guard pages
153: <li>Randomized malloc()
154: <li>Randomized mmap()
155: <li>atexit() and stdio protection
156: </ul>
1.295 otto 157: <li>Privilege separation
1.278 deraadt 158: <li>Privilege revocation
159: <li>Chroot jailing
160: <li>New uids
161: <li>ProPolice
162: <li>... and others
163: </ul>
164: <p>
165:
1.294 david 166: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 167:
1.45 deraadt 168: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 169: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 170: commonplace in security forums like
1.197 jufi 171: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 172:
1.45 deraadt 173: The most intense part of our security auditing happened immediately
1.80 espie 174: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 175: over the last third of 1996 and first half of 1997. Thousands (yes,
176: thousands) of security issues were fixed rapidly over this year-long
177: period; bugs like the standard buffer overflows, protocol
178: implementation weaknesses, information gathering, and filesystem
179: races. Hence most of the security problems that we encountered were
180: fixed before our 2.1 release, and then a far smaller number needed
181: fixing for our 2.2 release. We do not find as many problems anymore,
182: it is simply a case of diminishing returns. Recently the security
183: problems we find and fix tend to be significantly more obscure or
184: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 185:
1.35 deraadt 186: <ul>
1.45 deraadt 187: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 188: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 189: to search for more complicated exploits, so we will too.
190: <li>Finding and fixing subtle flaws in complicated software is
191: a lot of fun.
1.35 deraadt 192: </ul>
1.106 deraadt 193: <p>
1.15 deraadt 194:
1.14 deraadt 195: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 196: to find and fix new security flaws.<p>
1.12 deraadt 197:
1.288 matthieu 198: <a name="default"></a>
1.294 david 199: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 200:
201: To ensure that novice users of OpenBSD do not need to become security
202: experts overnight (a viewpoint which other vendors seem to have), we
203: ship the operating system in a Secure by Default mode. All non-essential
204: services are disabled. As the user/administrator becomes more familiar
205: with the system, he will discover that he has to enable daemons and other
206: parts of the system. During the process of learning how to enable a new
207: service, the novice is more likely to learn of security considerations.<p>
208:
209: This is in stark contrast to the increasing number of systems that
210: ship with NFS, mountd, web servers, and various other services enabled
211: by default, creating instantaneous security problems for their users
212: within minutes after their first install.<p>
213:
1.288 matthieu 214: <a name="crypto"></a>
1.294 david 215: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 216:
217: And of course, since the OpenBSD project is based in Canada, it is possible
218: for us to integrate cryptography. For more information, read the page
1.116 deraadt 219: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 220:
1.294 david 221: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 222:
223: <li>
1.312 david 224: <a name="37"></a>
225:
226: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
227: These are the OpenBSD 3.7 advisories -- all these problems are solved
228: in <a href=anoncvs.html>OpenBSD current</a> and the
229: <a href=stable.html>patch branch</a>.
230:
231: <p>
232: <ul>
1.316 ! millert 233: <li><a href="errata.html#libz">Jul 6, 2005:
! 234: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 235: <li><a href="errata.html#sudo">Jun 20, 2005:
1.316 ! millert 236: Fix a race condition in sudo(8) that could allow a user
1.315 millert 237: to run arbitrary commands.</a>
1.313 brad 238: <li><a href="errata.html#cvs">Jun 7, 2005:
239: Fix a buffer overflow, memory leaks, and NULL pointer
240: dereference in cvs(1).</a>
1.312 david 241: </ul>
242:
243: <li>
1.301 miod 244: <a name="36"></a>
245:
246: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
247: These are the OpenBSD 3.6 advisories -- all these problems are solved
248: in <a href=anoncvs.html>OpenBSD current</a> and the
249: <a href=stable.html>patch branch</a>.
250:
251: <p>
1.302 markus 252: <ul>
1.316 ! millert 253: <li><a href="errata36.html#libz">Jul 6, 2005:
! 254: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 255: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 ! millert 256: Fix a race condition in sudo(8) that could allow a user
1.315 millert 257: to run arbitrary commands.</a>
1.311 deraadt 258: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 259: Fix a buffer overflow, memory leaks, and NULL pointer
260: dereference in cvs(1).</a>
1.311 deraadt 261: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 262: Due to buffer overflows in telnet(1), a malicious
263: server or man-in-the-middle attack could allow
264: execution of arbitrary code with the privileges of
265: the user invoking telnet(1).</a>
1.311 deraadt 266: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 267: More stringent checking should be done in the copy(9)
268: functions to prevent their misuse.</a>
1.311 deraadt 269: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 270: More stringent checking should be done in the copy(9)
271: functions to prevent their misuse.</a>
1.311 deraadt 272: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 273: httpd(8)'s mod_include module fails to properly validate
274: the length of user supplied tag strings prior to copying
1.305 brad 275: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 276: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 277: On systems running isakmpd(8) it is possible for a local
278: user to cause kernel memory corruption and system panic by
1.303 markus 279: setting ipsec(4) credentials on a socket.</a>
1.302 markus 280: </ul>
1.301 miod 281:
282: <p>
1.314 miod 283: OpenBSD 3.5 and earlier releases are not supported anymore. The following
284: paragraphs only list advisories issued while they were maintained; these
285: releases are likely to be affected by the advisories for more recent releases.
286: <br>
287:
1.301 miod 288: <li>
1.288 matthieu 289: <a name="35"></a>
1.279 deraadt 290:
1.294 david 291: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 292: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 293: in <a href="anoncvs.html">OpenBSD current</a>. The
294: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
295: you should update your machine.
1.279 deraadt 296:
297: <p>
298: <ul>
1.310 brad 299: <li><a href="errata35.html#cvs4">Apr 28, 2005:
300: Fix a buffer overflow, memory leaks, and NULL pointer
301: dereference in cvs(1).</a>
1.309 brad 302: <li><a href="errata35.html#telnet">Mar 30, 2005:
303: Due to buffer overflows in telnet(1), a malicious
304: server or man-in-the-middle attack could allow
305: execution of arbitrary code with the privileges of
306: the user invoking telnet(1).</a>
1.308 brad 307: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 308: More stringent checking should be done in the copy(9)
309: functions to prevent their misuse.</a>
1.306 brad 310: <li><a href="errata35.html#locore">Feb 28, 2005:
311: More stringent checking should be done in the copy(9)
312: functions to prevent their misuse.</a>
1.304 brad 313: <li><a href="errata35.html#httpd3">Jan 12, 2005:
314: httpd(8)'s mod_include module fails to properly validate
315: the length of user supplied tag strings prior to copying
1.305 brad 316: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 317: <li><a href="errata35.html#pfkey">Dec 14, 2004:
318: On systems running isakmpd(8) it is possible for a local
319: user to cause kernel memory corruption and system panic by
1.303 markus 320: setting ipsec(4) credentials on a socket.</a>
1.301 miod 321: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 322: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 323: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 324: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 325: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 326: httpd(8)'s mod_rewrite module can be made to write one zero byte in
327: an arbitrary memory position outside of a char array, causing a DoS
328: or possibly buffer overflows.</a>
1.301 miod 329: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 330: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 331: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 332: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 333: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 334: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 335: Multiple remote vulnerabilities have been found in the cvs(1)
336: server which can be used by CVS clients to crash or execute
1.293 brad 337: arbitrary code on the server.</a>
1.301 miod 338: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 339: kdc(8) performs inadequate checking of request fields, leading
340: to the possibility of principal impersonation from other
341: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 342: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 343: xdm(1) ignores the requestPort resource and creates a
1.293 brad 344: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 345: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 346: A buffer overflow in the cvs(1) server has been found,
347: which can be used by CVS clients to execute arbitrary code on
1.293 brad 348: the server.</a>
1.301 miod 349: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 350: Integer overflow problems were found in procfs, allowing
1.293 brad 351: reading of arbitrary kernel memory.</a>
1.301 miod 352: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 353: Pathname validation problems have been found in cvs(1),
354: allowing clients and servers access to files outside the
1.293 brad 355: repository or local CVS tree.</a>
1.279 deraadt 356: </ul>
357:
358: <p>
359: <li>
1.288 matthieu 360: <a name="34"></a>
1.261 david 361:
1.294 david 362: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 363: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 364: in <a href="anoncvs.html">OpenBSD current</a>. The
365: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
366: you should update your machine.
1.261 david 367: <p>
368: <ul>
1.302 markus 369: <li><a href="errata34.html#pfkey">Dec 14, 2004:
370: On systems running isakmpd(8) it is possible for a local
371: user to cause kernel memory corruption and system panic by
1.303 markus 372: setting ipsec(4) credentials on a socket.</a>
1.298 brad 373: <li><a href="errata34.html#xpm">Sep 16, 2004:
374: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 375: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
376: httpd(8)'s mod_rewrite module can be made to write one zero byte in
377: an arbitrary memory position outside of a char array, causing a DoS
378: or possibly buffer overflows.</a>
1.294 david 379: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 380: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 381: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 382: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 383: an attacker can delete IPsec tunnels at will.</a>
1.294 david 384: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 385: Multiple remote vulnerabilities have been found in the cvs(1)
386: server which can be used by CVS clients to crash or execute
1.293 brad 387: arbitrary code on the server.</a>
1.294 david 388: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 389: kdc(8) performs inadequate checking of request fields, leading
390: to the possibility of principal impersonation from other
391: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 392: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 393: A buffer overflow in the cvs(1) server has been found,
394: which can be used by CVS clients to execute arbitrary code on
395: the server.</a>
1.294 david 396: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 397: Integer overflow problems were found in procfs, allowing
398: reading of arbitrary kernel memory.</a>
1.294 david 399: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 400: Pathname validation problems have been found in cvs(1),
401: allowing clients and servers access to files outside the
402: repository or local CVS tree.</a>
1.294 david 403: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 404: A missing check for a NULL-pointer dereference may allow a
1.281 otto 405: remote attacker to crash applications using OpenSSL.</a>
1.294 david 406: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 407: Defects in the payload validation and processing functions of
408: isakmpd have been discovered. An attacker could send malformed
409: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 410: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 411: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
412: access module, using IP addresses without a netmask on big endian
413: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 414: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 415: An IPv6 MTU handling problem exists that could be used by an
416: attacker to cause a denial of service attack.</a>
1.294 david 417: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 418: A reference counting bug in shmat(2) could be used to write to
419: kernel memory under certain circumstances.</a>
1.294 david 420: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 421: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 422: by Thomas Walpuski.</a>
1.294 david 423: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 424: It may be possible for a local user to overrun the stack in
425: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 426: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 427: The use of certain ASN.1 encodings or malformed public keys may
428: allow an attacker to mount a denial of service attack against
429: applications linked with ssl(3).</a>
1.261 david 430: </ul>
431:
432: <li>
1.288 matthieu 433: <a name="33"></a>
1.246 deraadt 434:
1.294 david 435: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 436: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 437: in <a href="anoncvs.html">OpenBSD current</a>. The
438: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 439: you should update your machine.
1.246 deraadt 440: <p>
441: <ul>
1.294 david 442: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 443: Pathname validation problems have been found in cvs(1),
444: allowing clients and servers access to files outside the
445: repository or local CVS tree.</a>
1.294 david 446: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 447: A missing check for a NULL-pointer dereference may allow a
1.281 otto 448: remote attacker to crash applications using OpenSSL.</a>
1.294 david 449: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 450: Defects in the payload validation and processing functions of
451: isakmpd have been discovered. An attacker could send malformed
452: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 453: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 454: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
455: access module, using IP addresses without a netmask on big endian
456: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 457: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 458: An IPv6 MTU handling problem exists that could be used by an
459: attacker to cause a denial of service attack.</a>
1.294 david 460: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 461: A reference counting bug in shmat(2) could be used to write to
462: kernel memory under certain circumstances.</a>
1.294 david 463: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 464: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 465: by Thomas Walpuski.</a>
1.294 david 466: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 467: It may be possible for a local user to execute arbitrary code
468: resulting in escalation of privileges due to a stack overrun
469: in compat_ibcs2(8).</a>
1.294 david 470: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 471: The use of certain ASN.1 encodings or malformed public keys may
472: allow an attacker to mount a denial of service attack against
473: applications linked with ssl(3).</a>
1.294 david 474: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 475: Access of freed memory in pf(4) could be used to
1.260 margarid 476: remotely panic a machine using scrub rules.</a>
1.294 david 477: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 478: A buffer overflow in the address parsing in
479: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 480: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 481: OpenSSH versions prior to 3.7 contains a buffer management error
482: that is potentially exploitable.</a>
1.294 david 483: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 484: Root may be able to reduce the security level by taking advantage of
485: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 486: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 487: An improper bounds check in the kernel may allow a local user
488: to panic the kernel.</a>
1.294 david 489: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 490: An off-by-one error exists in the C library function realpath(3)
491: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 492: </ul>
493:
1.265 miod 494:
1.247 david 495: <p>
1.246 deraadt 496: <li>
1.288 matthieu 497: <a name="32"></a>
1.224 deraadt 498:
1.294 david 499: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 500: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 501: in <a href="anoncvs.html">OpenBSD current</a>. The
502: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 503: you should update your machine.
1.224 deraadt 504: <p>
505: <ul>
1.294 david 506: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 507: The use of certain ASN.1 encodings or malformed public keys may
508: allow an attacker to mount a denial of service attack against
509: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 510: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 511: Access of freed memory in pf(4) could be used to
1.260 margarid 512: remotely panic a machine using scrub rules.</a>
1.294 david 513: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 514: A buffer overflow in the address parsing in
515: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 516: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 517: OpenSSH versions prior to 3.7 contains a buffer management error
518: that is potentially exploitable.</a>
1.294 david 519: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 520: Fix for a potential security issue in
521: sendmail(8) with respect to DNS maps.</a>
1.294 david 522: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 523: An off-by-one error exists in the C library function realpath(3)
524: may allow an attacker to gain escalated privileges.</a>
1.294 david 525: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 526: A buffer overflow in the address parsing in
527: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 528: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 529: A cryptographic weaknesses in the Kerberos v4 protocol can be
530: exploited on Kerberos v5 as well.</a>
1.294 david 531: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 532: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 533: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 534: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 535: Various SSL and TLS operations in OpenSSL are vulnerable to
536: timing attacks.</a>
1.294 david 537: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 538: A buffer overflow in lprm(1) may allow an attacker to elevate
539: privileges to user daemon.</a>.
1.294 david 540: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 541: A buffer overflow in the envelope comments processing in
542: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 543: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 544: httpd(8) leaks file inode numbers via ETag header as well as
545: child PIDs in multipart MIME boundary generation. This could
546: lead, for example, to NFS exploitation because it uses inode
547: numbers as part of the file handle.</a>
1.294 david 548: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 549: In ssl(8) an information leak can occur via timing by performing
550: a MAC computation even if incorrect block cipher padding has
551: been found, this is a countermeasure. Also, check for negative
552: sizes, in allocation routines.</a>
1.294 david 553: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 554: A double free exists in cvs(1) that could lead to privilege
555: escalation for cvs configurations where the cvs command is
1.233 margarid 556: run as a privileged user.</a>
1.294 david 557: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 558: A buffer overflow exists in named(8) that could lead to a
559: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 560: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 561: A logic error in the pool kernel memory allocator could cause
562: memory corruption in low-memory situations, causing the system
563: to crash.</a>
1.294 david 564: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 565: An attacker can bypass smrsh(8)'s restrictions and execute
566: arbitrary commands with the privileges of his own account.</a>
1.294 david 567: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 568: Network bridges running pf with scrubbing enabled could cause
569: mbuf corruption, causing the system to crash.</a>
1.294 david 570: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 571: A buffer overflow can occur in the kadmind(8) daemon, leading
572: to possible remote crash or exploit.</a>
1.224 deraadt 573: </ul>
574:
1.227 miod 575: <p>
576: <li>
1.288 matthieu 577: <a name="31"></a>
1.203 deraadt 578:
1.294 david 579: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 580: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 581: in <a href="anoncvs.html">OpenBSD current</a>. The
582: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 583: you should update your machine.
1.203 deraadt 584:
585: <p>
586: <ul>
1.294 david 587: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 588: A buffer overflow in the address parsing in
589: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 590: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 591: A cryptographic weaknesses in the Kerberos v4 protocol can be
592: exploited on Kerberos v5 as well.</a>
1.294 david 593: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 594: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 595: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 596: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 597: Various SSL and TLS operations in OpenSSL are vulnerable to
598: timing attacks.</a>
1.294 david 599: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 600: A buffer overflow in lprm(1) may allow an attacker to gain
601: root privileges.</a>
1.294 david 602: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 603: A buffer overflow in the envelope comments processing in
604: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 605: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 606: In ssl(8) an information leak can occur via timing by performing
607: a MAC computation even if incorrect block cipher padding has
608: been found, this is a countermeasure. Also, check for negative
609: sizes, in allocation routines.</a>
1.294 david 610: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 611: A double free exists in cvs(1) that could lead to privilege
612: escalation for cvs configurations where the cvs command is
1.294 david 613: run as a privileged user</a>.
614: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 615: A buffer overflow exists in named(8) that could lead to a
616: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 617: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 618: Incorrect argument checking in the getitimer(2) system call
619: may allow an attacker to crash the system.</a>
1.294 david 620: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 621: An attacker can bypass smrsh(8)'s restrictions and execute
622: arbitrary commands with the privileges of his own account.</a>
1.294 david 623: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 624: A buffer overflow can occur in the kadmind(8) daemon, leading
625: to possible remote crash or exploit.</a>
1.294 david 626: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 627: Incorrect argument checking in the setitimer(2) system call
628: may allow an attacker to write to kernel memory.</a>
1.294 david 629: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 630: An insufficient boundary check in the select system call
1.220 miod 631: allows an attacker to overwrite kernel memory and execute arbitrary code
632: in kernel context.</a>
1.294 david 633: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 634: Several remote buffer overflows can occur in the SSL2 server and SSL3
635: client of the ssl(8) library, as in the ASN.1 parser code in the
636: crypto(3) library, all of them being potentially remotely
637: exploitable.</a>
1.294 david 638: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 639: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
640: possible remote crash.</a>
1.294 david 641: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 642: A race condition exists in the pppd(8) daemon which may cause it to
643: alter the file permissions of an arbitrary file.</a>
1.294 david 644: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 645: Receiving IKE payloads out of sequence can cause isakmpd(8) to
646: crash.</a>
1.294 david 647: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 648: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 649: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 650: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 651: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 652: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 653: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 654: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 655: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 656: input validation error that can result in an integer overflow and
657: privilege escalation.</a>
1.294 david 658: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 659: A buffer overflow can occur during the interpretation of chunked
660: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 661: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 662: Under certain conditions, on systems using YP with netgroups
663: in the password database, it is possible that sshd(8) does
664: ACL checks for the requested user name but uses the password
665: database entry of a different user for authentication. This
666: means that denied users might authenticate successfully
667: while permitted users could be locked out.</a>
1.294 david 668: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 669: A race condition exists that could defeat the kernel's
670: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 671: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 672: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 673: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 674: A local user can gain super-user privileges due to a buffer
675: overflow in sshd(8) if AFS has been configured on the system
676: or if KerberosTgtPassing or AFSTokenPassing has been enabled
677: in the sshd_config file.</a>
1.203 deraadt 678: </ul>
679:
1.235 miod 680: <p>
1.203 deraadt 681: <li>
1.288 matthieu 682: <a name="30"></a>
1.187 deraadt 683:
1.294 david 684: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 685: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 686: in <a href="anoncvs.html">OpenBSD current</a>. The
687: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 688: you should update your machine.
1.187 deraadt 689:
690: <p>
691: <ul>
1.294 david 692: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 693: A buffer overflow exists in named(8) that could lead to a
694: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 695: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 696: Incorrect argument checking in the getitimer(2) system call
697: may allow an attacker to crash the system.</a>
1.294 david 698: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 699: An attacker can bypass smrsh(8)'s restrictions and execute
700: arbitrary commands with the privileges of his own account.</a>
1.294 david 701: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 702: A buffer overflow can occur in the kadmind(8) daemon, leading
703: to possible remote crash or exploit.</a>
1.294 david 704: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 705: Incorrect argument checking in the setitimer(2) system call
706: may allow an attacker to write to kernel memory.</a>
1.294 david 707: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 708: An insufficient boundary check in the select and poll system calls
709: allows an attacker to overwrite kernel memory and execute arbitrary code
710: in kernel context.</a>
1.294 david 711: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 712: Several remote buffer overflows can occur in the SSL2 server and SSL3
713: client of the ssl(8) library, as in the ASN.1 parser code in the
714: crypto(3) library, all of them being potentially remotely
715: exploitable.</a>
1.294 david 716: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 717: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
718: possible remote crash.</a>
1.294 david 719: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 720: A race condition exists in the pppd(8) daemon which may cause it to
721: alter the file permissions of an arbitrary file.</a>
1.294 david 722: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 723: Receiving IKE payloads out of sequence can cause isakmpd(8) to
724: crash.</a>
1.294 david 725: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 726: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 727: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 728: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 729: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 730: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 731: input validation error that can result in an integer overflow and
732: privilege escalation.</a>
1.294 david 733: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 734: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 735: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 736: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 737: A buffer overflow can occur during the interpretation of chunked
738: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 739: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 740: A race condition exists that could defeat the kernel's
741: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 742: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 743: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 744: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 745: A local user can gain super-user privileges due to a buffer
746: overflow in sshd(8) if AFS has been configured on the system
747: or if KerberosTgtPassing or AFSTokenPassing has been enabled
748: in the sshd_config file.</a>
1.294 david 749: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 750: The mail(1) was interpreting tilde escapes even when invoked
751: in non-interactive mode. As mail(1) is called as root from cron,
752: this can lead to a local root compromise.</a>
1.294 david 753: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 754: Under certain conditions, on systems using YP with netgroups in
755: the password database, it is possible for the rexecd(8) and rshd(8)
756: daemons to execute a shell from a password database entry for a
757: different user. Similarly, atrun(8) may change to the wrong
758: home directory when running jobs.</a>
1.294 david 759: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 760: A potential double free() exists in the zlib library;
761: this is not exploitable on OpenBSD.
762: The kernel also contains a copy of zlib; it is not
763: currently known if the kernel zlib is exploitable.</a>
1.294 david 764: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 765: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 766: may allow a local user to gain super-user privileges.</a>
1.294 david 767: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 768: A race condition between the ptrace(2) and execve(2) system calls
769: allows an attacker to modify the memory contents of suid/sgid
770: processes which could lead to compromise of the super-user account.</a>
1.294 david 771: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 772: There is a security hole in sudo(8) that can be exploited
773: when the Postfix sendmail replacement is installed that may
774: allow an attacker on the local host to gain root privileges.</a>
1.294 david 775: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 776: An attacker can trick a machine running the lpd daemon into
777: creating new files in the root directory from a machine with
778: remote line printer access.</a>
1.294 david 779: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 780: The vi.recover script can be abused in such a way as
781: to cause arbitrary zero-length files to be removed.</a>
1.294 david 782: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 783: pf(4) was incapable of dealing with certain ipv6 icmp packets,
784: resulting in a crash.</a>
1.294 david 785: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 786: A security hole that may allow an attacker to partially authenticate
787: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 788: </ul>
789:
790: <p>
791: <li>
1.288 matthieu 792: <a name="29"></a>
1.173 deraadt 793:
1.294 david 794: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 795: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 796: in <a href="anoncvs.html">OpenBSD current</a>. The
797: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 798: you should update your machine.
799:
1.173 deraadt 800:
801: <p>
802: <ul>
1.294 david 803: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 804: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 805: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 806: A race condition exists that could defeat the kernel's
807: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 808: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 809: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 810: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 811: A local user can gain super-user privileges due to a buffer
812: overflow in sshd(8) if AFS has been configured on the system
813: or if KerberosTgtPassing or AFSTokenPassing has been enabled
814: in the sshd_config file.</a>
1.294 david 815: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 816: The mail(1) was interpreting tilde escapes even when invoked
817: in non-interactive mode. As mail(1) is called as root from cron,
818: this can lead to a local root compromise.</a>
1.294 david 819: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 820: A potential double free() exists in the zlib library;
821: this is not exploitable on OpenBSD.
822: The kernel also contains a copy of zlib; it is not
823: currently known if the kernel zlib is exploitable.</a>
1.294 david 824: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 825: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 826: may allow a local user to gain super-user privileges.</a>
1.294 david 827: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 828: A race condition between the ptrace(2) and execve(2) system calls
829: allows an attacker to modify the memory contents of suid/sgid
830: processes which could lead to compromise of the super-user account.</a>
1.294 david 831: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 832: There is a security hole in sudo(8) that can be exploited
833: when the Postfix sendmail replacement is installed that may
834: allow an attacker on the local host to gain root privileges.</a>
1.294 david 835: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 836: An attacker can trick a machine running the lpd daemon into
837: creating new files in the root directory from a machine with
838: remote line printer access.</a>
1.294 david 839: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 840: The vi.recover script can be abused in such a way as
841: to cause arbitrary zero-length files to be removed.</a>
1.294 david 842: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 843: A security hole exists in uuxqt(8) that may allow an
844: attacker to gain root privileges.</a>
1.294 david 845: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 846: A security hole exists in lpd(8) that may allow an
847: attacker to gain root privileges if lpd is running.</a>
1.294 david 848: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 849: A security hole exists in sendmail(8) that may allow an
850: attacker on the local host to gain root privileges.</a>
1.294 david 851: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 852: A kernel buffer overflow in the NFS code can be used to execute
853: arbitrary code by users with mount privileges (only root by
1.181 millert 854: default).</a>
1.294 david 855: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 856: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 857: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 858: sshd(8) allows users to delete arbitrary files named "cookies"
859: if X11 forwarding is enabled. X11 forwarding is disabled
860: by default.</a>
1.294 david 861: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 862: Programs using the fts routines can be tricked into changing
863: into the wrong directory.</a>
1.294 david 864: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 865: Sendmail signal handlers contain unsafe code,
866: leading to numerous race conditions.</a>
1.173 deraadt 867: </ul>
868:
869: <p>
870: <li>
1.288 matthieu 871: <a name="28"></a>
1.152 deraadt 872:
1.294 david 873: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 874: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 875: in <a href="anoncvs.html">OpenBSD current</a>. The
876: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 877: you should update your machine.
878:
1.152 deraadt 879:
880: <p>
881: <ul>
1.294 david 882: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 883: A security hole exists in uuxqt(8) that may allow an
884: attacker to gain root privileges.</a>
1.294 david 885: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 886: A security hole exists in lpd(8) that may allow an
887: attacker to gain root privileges if lpd is running.</a>
1.294 david 888: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 889: A security hole exists in sendmail(8) that may allow an
890: attacker on the local host to gain root privileges.</a>
1.294 david 891: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 892: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 893: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 894: Programs using the fts routines can be tricked into changing
895: into the wrong directory.</a>
1.294 david 896: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 897: Sendmail signal handlers contain unsafe code,
898: leading to numerous race conditions.</a>
1.294 david 899: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 900: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 901: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 902: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 903: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 904: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 905: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 906: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 907: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 908: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 909: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 910: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 911: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 912: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 913: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 914: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 915: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 916: rnd(4) did not use all of its input when written to.</a>
1.294 david 917: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 918: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 919: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 920: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 921: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 922: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 923: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 924: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 925: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 926: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 927: </ul>
928:
929: <p>
930: <li>
1.288 matthieu 931: <a name="27"></a>
1.124 deraadt 932:
1.294 david 933: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 934: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 935: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 936: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
937:
938: <p>
939: <ul>
1.294 david 940: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 941: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 942: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 943: a buffer overflow was fixed in sudo(8).</a>
1.294 david 944: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 945: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 946: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 947: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
948: (patch included)</a>
1.294 david 949: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 950: X11 libraries have 2 potential overflows in xtrans code.
951: (patch included)</a>
1.294 david 952: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 953: Apache mod_rewrite and mod_vhost_alias modules could expose files
954: on the server in certain configurations if used.
955: (patch included)</a>
1.294 david 956: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 957: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
958: TERMPATH and TERMCAP environment variables as it should.
959: (patch included)</a>
1.294 david 960: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 961: There are printf-style format string bugs in several privileged
962: programs. (patch included)</a>
1.294 david 963: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 964: libcurses honored terminal descriptions in the $HOME/.terminfo
965: directory as well as in the TERMCAP environment variable for
966: setuid and setgid applications.
1.146 deraadt 967: (patch included)</a>
1.294 david 968: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 969: A format string vulnerability exists in talkd(8).
970: (patch included)</a>
1.294 david 971: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 972: A format string vulnerability exists in the pw_error() function of the
973: libutil library, yielding localhost root through chpass(1).
974: (patch included)</a>
1.294 david 975: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 976: Bad ESP/AH packets could cause a crash under certain conditions.
977: (patch included)</a>
1.294 david 978: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 979: A format string vulnerability (localhost root) exists in xlock(1).
980: (patch included)</a>
1.294 david 981: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 982: Various bugs found in X11 libraries have various side effects, almost
983: completely denial of service in OpenBSD.
984: (patch included)</a>
1.294 david 985: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 986: Just like pretty much all the other unix ftp daemons
987: on the planet, ftpd had a remote root hole in it.
988: Luckily, ftpd was not enabled by default.
1.137 deraadt 989: The problem exists if anonymous ftp is enabled.
1.136 deraadt 990: (patch included)</a>
1.294 david 991: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 992: Mopd, very rarely used, contained some buffer overflows.
993: (patch included)</a>
1.294 david 994: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 995: libedit would check for a <b>.editrc</b> file in the current
996: directory. Not known to be a real security issue, but a patch
997: is available anyways.
998: (patch included)</a>
1.294 david 999: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1000: A serious bug in dhclient(8) could allow strings from a
1001: malicious dhcp server to be executed in the shell as root.
1002: (patch included)</a>
1.294 david 1003: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1004: A serious bug in isakmpd(8) policy handling wherein
1005: policy verification could be completely bypassed in isakmpd.
1006: (patch included)</a>
1.294 david 1007: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1008: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1009: should not be used, and results in security problems on
1010: other operating systems.</a>
1.294 david 1011: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1012: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1013: (patch included)</a>
1.294 david 1014: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1015: Improper use of ipf <i>keep-state</i> rules can result
1016: in firewall rules being bypassed. (patch included)</a>
1017:
1.124 deraadt 1018: </ul>
1019:
1020: <p>
1021: <li>
1.288 matthieu 1022: <a name="26"></a>
1.119 deraadt 1023:
1.294 david 1024: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1025: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1026: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1027: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1028:
1029: <p>
1030: <ul>
1.294 david 1031: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1032: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1033: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1034: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1035: Improper use of ipf <i>keep-state</i> rules can result
1036: in firewall rules being bypassed. (patch included)</a>
1.294 david 1037: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1038: xlockmore has a bug which a localhost attacker can use to gain
1039: access to the encrypted root password hash (which is normally
1.245 miod 1040: encoded using blowfish</a> (see
1.294 david 1041: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1042: crypt(3)</a>)
1.245 miod 1043: (patch included).
1.294 david 1044: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1045: Systems running with procfs enabled and mounted are
1046: vulnerable to a very tricky exploit. procfs is not
1047: mounted by default.
1048: (patch included).</a>
1.294 david 1049: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1050: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1051: thus exposing the system to a race where the aliases file
1052: did not exist.
1.119 deraadt 1053: (patch included).</a>
1.294 david 1054: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1055: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1056: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1057: A buffer overflow in the RSAREF code included in the
1058: USA version of libssl, is possibly exploitable in
1059: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1060: (patch included).<br></a>
1061: <strong>Update:</strong> Turns out that this was not exploitable
1062: in any of the software included in OpenBSD 2.6.
1.294 david 1063: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1064: Any user could change interface media configurations, resulting in
1065: a localhost denial of service attack.
1.121 deraadt 1066: (patch included).</a>
1.119 deraadt 1067: </ul>
1068:
1069: <p>
1070: <li>
1.288 matthieu 1071: <a name="25"></a>
1.106 deraadt 1072:
1.294 david 1073: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1074: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1075: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1076: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1077:
1.96 deraadt 1078: <p>
1.104 deraadt 1079: <ul>
1.294 david 1080: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1081: In cron(8), make sure argv[] is NULL terminated in the
1082: fake popen() and run sendmail as the user, not as root.
1083: (patch included).</a>
1.294 david 1084: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1085: filesystems had an overrun in their handling of uio_offset
1086: in their readdir() routines. (These filesystems are not
1087: enabled by default). (patch included).</a>
1.294 david 1088: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1089: when we execve() a new process. (patch included).</a>
1.294 david 1090: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1091: been handled by IPsec may be transmitted as cleartext.
1092: PF_KEY SA expirations may leak kernel resources.
1093: (patch included).</a>
1.294 david 1094: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1095: motd re-writing and change the find(1) to use -execdir
1096: (patch included).</a>
1.294 david 1097: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1098: users to chflags(2) or fchflags(2) on character or block devices
1099: which they may currently be the owner of (patch included).</a>
1.294 david 1100: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1101: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1102: </ul>
1103:
1.106 deraadt 1104: <p>
1105: <li>
1.288 matthieu 1106: <a name="24"></a>
1.235 miod 1107:
1.294 david 1108: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1109: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1110: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1111: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1112:
1.96 deraadt 1113: <p>
1.75 deraadt 1114: <ul>
1.294 david 1115: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1116: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1117: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1118: another kernel crash case caused by the <strong>crashme</strong>
1119: program (patch included).</a>
1.294 david 1120: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1121: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1122: (patch included).</a>
1.294 david 1123: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1124: existed in ping(8). (patch included).</a>
1.294 david 1125: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1126: the ipq, which could permit an attacker to cause a crash.
1127: (patch included).</a>
1.294 david 1128: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1129: kernel between accept(2) and select(2) could permit an attacker
1130: to hang sockets from remote.
1131: (patch included).</a>
1.294 david 1132: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1133: bog the machine excessively and cause problems.
1134: (patch included).</a>
1.294 david 1135: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1136: DDB interacted to possibly cause a crash.
1137: (patch included).</a>
1.294 david 1138: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1139: (patch included).</a>
1.294 david 1140: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1141: problem in bootpd(8). (patch included).</a>
1.294 david 1142: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1143: exploitable problem relating to environment variables in termcap
1144: and curses. (patch included).</a>
1.294 david 1145: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1146: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1147: </ul>
1148:
1.106 deraadt 1149: <p>
1150: <li>
1.288 matthieu 1151: <a name="23"></a>
1.235 miod 1152:
1.294 david 1153: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1154: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1155: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1156: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1157:
1.96 deraadt 1158: <p>
1.53 matthieu 1159: <ul>
1.294 david 1160: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1161: problem in bootpd(8). (patch included).</a>
1.294 david 1162: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1163: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1164: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1165: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1166: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1167: chpass(1) has a file descriptor leak which allows an
1168: attacker to modify /etc/master.passwd.</a>
1.294 david 1169: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1170: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1171: should not be executed with fd slots 0, 1, or 2 free.
1172: (patch included).</a>
1.294 david 1173: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1174: libraries (patches included).</a>
1.294 david 1175: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1176: processes too permissive (4th revision patch included).</a>
1.294 david 1177: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1178: of immutable and append-only file flags. (patch included).</a>
1.294 david 1179: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1180: if IPSEC is enabled (patch included).</a>
1.294 david 1181: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1182: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1183: </ul>
1.9 deraadt 1184:
1.106 deraadt 1185: <p>
1186: <li>
1.288 matthieu 1187: <a name="22"></a>
1.235 miod 1188:
1.294 david 1189: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1190: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1191: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1192: still exist in other operating systems. (The supplied patches are for
1193: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1194:
1.96 deraadt 1195: <p>
1.9 deraadt 1196: <ul>
1.294 david 1197: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1198: packets if IPSEC is enabled (patch included).</a>
1.294 david 1199: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1200: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1201: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1202: (patch included).</a>
1.294 david 1203: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1204: (patch included).</a>
1.294 david 1205: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1206: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1207: (patch included).</a>
1.294 david 1208: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1209: export (patch included).</a>
1.112 philen 1210: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1211: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1212: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1213: Acceptance.</a>
1.294 david 1214: A patch is available <a href="errata22.html#sourceroute">here</a>.
1215: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1216: flaw (patch included).</a>
1.294 david 1217: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1218: </ul>
1219:
1.106 deraadt 1220: <p>
1221: <li>
1.288 matthieu 1222: <a name="21"></a>
1.235 miod 1223:
1.294 david 1224: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1225: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1226: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1227: exist in other operating systems. (If you are running OpenBSD 2.1, we
1228: would strongly recommend an upgrade to the newest release, as this
1229: patch list only attempts at fixing the most important security
1230: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1231: security problems. Many of those problems were solved in ways which
1232: make it hard for us to provide patches).
1233:
1.96 deraadt 1234: <p>
1.52 deraadt 1235: <ul>
1.112 philen 1236: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1237: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1238: (patch included)</a>
1.112 philen 1239: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1240: </ul>
1.51 deraadt 1241:
1.106 deraadt 1242: <p>
1243: <li>
1.288 matthieu 1244: <a name="20"></a>
1.235 miod 1245:
1.294 david 1246: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1247: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1248: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1249: exist in other operating systems. (If you are running OpenBSD 2.0, we
1250: commend you for being there back in the old days!, but you're really
1251: missing out if you don't install a new version!)
1252:
1253: <p>
1254: <ul>
1.112 philen 1255: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1256: resolver (patch included)</a>
1257: <li>Many others... if people can hunt them down, please let me know
1258: and we'll put them up here.
1259: </ul>
1.51 deraadt 1260: <p>
1.106 deraadt 1261:
1.288 matthieu 1262: <a name="watching"></a>
1.294 david 1263: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1264:
1.21 deraadt 1265: Since we take a proactive stance with security, we are continually
1266: finding and fixing new security problems. Not all of these problems
1.80 espie 1267: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1268: confirmed to be exploitable; many simple bugs we fix do turn out to
1269: have security consequences we could not predict. We do not have the
1270: time resources to make these changes available in the above format.<p>
1.21 deraadt 1271:
1272: Thus there are usually minor security fixes in the current source code
1273: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1274: guarantee that these problems are of minimal impact and unproven
1.44 ian 1275: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1276: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1277:
1.45 deraadt 1278: People who are really concerned with security can do a number of
1279: things:<p>
1.21 deraadt 1280:
1281: <ul>
1282: <li>If you understand security issues, watch our
1.294 david 1283: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1284: eye out for things which appear security related. Since
1.21 deraadt 1285: exploitability is not proven for many of the fixes we make,
1286: do not expect the relevant commit message to say "SECURITY FIX!".
1287: If a problem is proven and serious, a patch will be available
1288: here very shortly after.
1.161 horacio 1289: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1290: security-announce mailing list</a> which will notify you for every
1.186 ian 1291: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1292: and instruct you on how to patch the problem.
1.21 deraadt 1293: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1294: complete system build from time to time (read /usr/src/Makefile
1295: carefully). Users can make the assumption that the current
1296: source tree always has stronger security than the previous release.
1.45 deraadt 1297: However, building your own system from source code is not trivial;
1.265 miod 1298: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1299: transition between major releases.
1.115 ericj 1300: <li>Install a binary snapshot for your
1.80 espie 1301: architecture, which are made available fairly often. For
1.29 deraadt 1302: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1303: </ul>
1304:
1.9 deraadt 1305: <p>
1.288 matthieu 1306: <a name="reporting"></a>
1.294 david 1307: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1308:
1.5 deraadt 1309: <p> If you find a new security problem, you can mail it to
1.294 david 1310: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1311: <br>
1.5 deraadt 1312: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1313: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1314:
1.107 deraadt 1315: <p>
1.288 matthieu 1316: <a name="papers"></a>
1.294 david 1317: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1318:
1319: A number of papers have been written by OpenBSD team members, about security
1320: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1321: documents are available as follows.<p>
1.107 deraadt 1322:
1323: <ul>
1.113 deraadt 1324: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1325: <a href="events.html#usenix99">Usenix 1999</a>,
1326: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1327: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1328: <a href="papers/bcrypt-paper.ps">paper</a> and
1329: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1330: <p>
1331: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1332: <a href="events.html#usenix99">Usenix 1999</a>,
1333: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1334: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1335: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1336: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1337: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1338: <a href="papers/crypt-paper.ps">paper</a> and
1339: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1340: <p>
1341: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1342: <a href="events.html#usenix99">Usenix 1999</a>,
1343: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1344: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1345: <a href="papers/strlcpy-paper.ps">paper</a> and
1346: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1347: <p>
1.118 deraadt 1348: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1349: <a href="events.html#lisa99">LISA 1999</a>,
1350: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1351: <a href="papers/authgw-paper.ps">paper</a> and
1352: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1353: <p>
1.153 jufi 1354: <li>Encrypting Virtual Memory<br>
1.294 david 1355: <a href="events.html#sec2000">Usenix Security 2000</a>,
1356: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1357: <a href="papers/swapencrypt.ps">paper</a> and
1358: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1359: <p>
1.107 deraadt 1360: </ul>
1.294 david 1361: </ul>
1.106 deraadt 1362:
1.2 deraadt 1363: <hr>
1.294 david 1364: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1365: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1366: <br>
1.316 ! millert 1367: <small>$OpenBSD: security.html,v 1.315 2005/06/21 04:04:27 millert Exp $</small>
1.1 deraadt 1368:
1.24 deraadt 1369: </body>
1370: </html>