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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>
1.317 ! millert 233: <li><a href="errata.html#libz2">Jul 21, 2005:
! 234: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 235: <li><a href="errata.html#libz">Jul 6, 2005:
236: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 237: <li><a href="errata.html#sudo">Jun 20, 2005:
1.316 millert 238: Fix a race condition in sudo(8) that could allow a user
1.315 millert 239: to run arbitrary commands.</a>
1.313 brad 240: <li><a href="errata.html#cvs">Jun 7, 2005:
241: Fix a buffer overflow, memory leaks, and NULL pointer
242: dereference in cvs(1).</a>
1.312 david 243: </ul>
244:
245: <li>
1.301 miod 246: <a name="36"></a>
247:
248: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
249: These are the OpenBSD 3.6 advisories -- all these problems are solved
250: in <a href=anoncvs.html>OpenBSD current</a> and the
251: <a href=stable.html>patch branch</a>.
252:
253: <p>
1.302 markus 254: <ul>
1.317 ! millert 255: <li><a href="errata36.html#libz2">Jul 21, 2005:
! 256: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 257: <li><a href="errata36.html#libz">Jul 6, 2005:
258: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 259: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 260: Fix a race condition in sudo(8) that could allow a user
1.315 millert 261: to run arbitrary commands.</a>
1.311 deraadt 262: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 263: Fix a buffer overflow, memory leaks, and NULL pointer
264: dereference in cvs(1).</a>
1.311 deraadt 265: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 266: Due to buffer overflows in telnet(1), a malicious
267: server or man-in-the-middle attack could allow
268: execution of arbitrary code with the privileges of
269: the user invoking telnet(1).</a>
1.311 deraadt 270: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 271: More stringent checking should be done in the copy(9)
272: functions to prevent their misuse.</a>
1.311 deraadt 273: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 274: More stringent checking should be done in the copy(9)
275: functions to prevent their misuse.</a>
1.311 deraadt 276: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 277: httpd(8)'s mod_include module fails to properly validate
278: the length of user supplied tag strings prior to copying
1.305 brad 279: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 280: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 281: On systems running isakmpd(8) it is possible for a local
282: user to cause kernel memory corruption and system panic by
1.303 markus 283: setting ipsec(4) credentials on a socket.</a>
1.302 markus 284: </ul>
1.301 miod 285:
286: <p>
1.314 miod 287: OpenBSD 3.5 and earlier releases are not supported anymore. The following
288: paragraphs only list advisories issued while they were maintained; these
289: releases are likely to be affected by the advisories for more recent releases.
290: <br>
291:
1.301 miod 292: <li>
1.288 matthieu 293: <a name="35"></a>
1.279 deraadt 294:
1.294 david 295: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 296: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 297: in <a href="anoncvs.html">OpenBSD current</a>. The
298: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
299: you should update your machine.
1.279 deraadt 300:
301: <p>
302: <ul>
1.310 brad 303: <li><a href="errata35.html#cvs4">Apr 28, 2005:
304: Fix a buffer overflow, memory leaks, and NULL pointer
305: dereference in cvs(1).</a>
1.309 brad 306: <li><a href="errata35.html#telnet">Mar 30, 2005:
307: Due to buffer overflows in telnet(1), a malicious
308: server or man-in-the-middle attack could allow
309: execution of arbitrary code with the privileges of
310: the user invoking telnet(1).</a>
1.308 brad 311: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 312: More stringent checking should be done in the copy(9)
313: functions to prevent their misuse.</a>
1.306 brad 314: <li><a href="errata35.html#locore">Feb 28, 2005:
315: More stringent checking should be done in the copy(9)
316: functions to prevent their misuse.</a>
1.304 brad 317: <li><a href="errata35.html#httpd3">Jan 12, 2005:
318: httpd(8)'s mod_include module fails to properly validate
319: the length of user supplied tag strings prior to copying
1.305 brad 320: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 321: <li><a href="errata35.html#pfkey">Dec 14, 2004:
322: On systems running isakmpd(8) it is possible for a local
323: user to cause kernel memory corruption and system panic by
1.303 markus 324: setting ipsec(4) credentials on a socket.</a>
1.301 miod 325: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 326: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 327: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 328: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 329: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 330: httpd(8)'s mod_rewrite module can be made to write one zero byte in
331: an arbitrary memory position outside of a char array, causing a DoS
332: or possibly buffer overflows.</a>
1.301 miod 333: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 334: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 335: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 336: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 337: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 338: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 339: Multiple remote vulnerabilities have been found in the cvs(1)
340: server which can be used by CVS clients to crash or execute
1.293 brad 341: arbitrary code on the server.</a>
1.301 miod 342: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 343: kdc(8) performs inadequate checking of request fields, leading
344: to the possibility of principal impersonation from other
345: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 346: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 347: xdm(1) ignores the requestPort resource and creates a
1.293 brad 348: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 349: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 350: A buffer overflow in the cvs(1) server has been found,
351: which can be used by CVS clients to execute arbitrary code on
1.293 brad 352: the server.</a>
1.301 miod 353: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 354: Integer overflow problems were found in procfs, allowing
1.293 brad 355: reading of arbitrary kernel memory.</a>
1.301 miod 356: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 357: Pathname validation problems have been found in cvs(1),
358: allowing clients and servers access to files outside the
1.293 brad 359: repository or local CVS tree.</a>
1.279 deraadt 360: </ul>
361:
362: <p>
363: <li>
1.288 matthieu 364: <a name="34"></a>
1.261 david 365:
1.294 david 366: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 367: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 368: in <a href="anoncvs.html">OpenBSD current</a>. The
369: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
370: you should update your machine.
1.261 david 371: <p>
372: <ul>
1.302 markus 373: <li><a href="errata34.html#pfkey">Dec 14, 2004:
374: On systems running isakmpd(8) it is possible for a local
375: user to cause kernel memory corruption and system panic by
1.303 markus 376: setting ipsec(4) credentials on a socket.</a>
1.298 brad 377: <li><a href="errata34.html#xpm">Sep 16, 2004:
378: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 379: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
380: httpd(8)'s mod_rewrite module can be made to write one zero byte in
381: an arbitrary memory position outside of a char array, causing a DoS
382: or possibly buffer overflows.</a>
1.294 david 383: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 384: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 385: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 386: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 387: an attacker can delete IPsec tunnels at will.</a>
1.294 david 388: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 389: Multiple remote vulnerabilities have been found in the cvs(1)
390: server which can be used by CVS clients to crash or execute
1.293 brad 391: arbitrary code on the server.</a>
1.294 david 392: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 393: kdc(8) performs inadequate checking of request fields, leading
394: to the possibility of principal impersonation from other
395: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 396: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 397: A buffer overflow in the cvs(1) server has been found,
398: which can be used by CVS clients to execute arbitrary code on
399: the server.</a>
1.294 david 400: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 401: Integer overflow problems were found in procfs, allowing
402: reading of arbitrary kernel memory.</a>
1.294 david 403: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 404: Pathname validation problems have been found in cvs(1),
405: allowing clients and servers access to files outside the
406: repository or local CVS tree.</a>
1.294 david 407: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 408: A missing check for a NULL-pointer dereference may allow a
1.281 otto 409: remote attacker to crash applications using OpenSSL.</a>
1.294 david 410: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 411: Defects in the payload validation and processing functions of
412: isakmpd have been discovered. An attacker could send malformed
413: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 414: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 415: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
416: access module, using IP addresses without a netmask on big endian
417: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 418: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 419: An IPv6 MTU handling problem exists that could be used by an
420: attacker to cause a denial of service attack.</a>
1.294 david 421: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 422: A reference counting bug in shmat(2) could be used to write to
423: kernel memory under certain circumstances.</a>
1.294 david 424: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 425: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 426: by Thomas Walpuski.</a>
1.294 david 427: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 428: It may be possible for a local user to overrun the stack in
429: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 430: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 431: The use of certain ASN.1 encodings or malformed public keys may
432: allow an attacker to mount a denial of service attack against
433: applications linked with ssl(3).</a>
1.261 david 434: </ul>
435:
436: <li>
1.288 matthieu 437: <a name="33"></a>
1.246 deraadt 438:
1.294 david 439: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 440: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 441: in <a href="anoncvs.html">OpenBSD current</a>. The
442: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 443: you should update your machine.
1.246 deraadt 444: <p>
445: <ul>
1.294 david 446: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 447: Pathname validation problems have been found in cvs(1),
448: allowing clients and servers access to files outside the
449: repository or local CVS tree.</a>
1.294 david 450: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 451: A missing check for a NULL-pointer dereference may allow a
1.281 otto 452: remote attacker to crash applications using OpenSSL.</a>
1.294 david 453: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 454: Defects in the payload validation and processing functions of
455: isakmpd have been discovered. An attacker could send malformed
456: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 457: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 458: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
459: access module, using IP addresses without a netmask on big endian
460: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 461: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 462: An IPv6 MTU handling problem exists that could be used by an
463: attacker to cause a denial of service attack.</a>
1.294 david 464: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 465: A reference counting bug in shmat(2) could be used to write to
466: kernel memory under certain circumstances.</a>
1.294 david 467: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 468: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 469: by Thomas Walpuski.</a>
1.294 david 470: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 471: It may be possible for a local user to execute arbitrary code
472: resulting in escalation of privileges due to a stack overrun
473: in compat_ibcs2(8).</a>
1.294 david 474: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 475: The use of certain ASN.1 encodings or malformed public keys may
476: allow an attacker to mount a denial of service attack against
477: applications linked with ssl(3).</a>
1.294 david 478: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 479: Access of freed memory in pf(4) could be used to
1.260 margarid 480: remotely panic a machine using scrub rules.</a>
1.294 david 481: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 482: A buffer overflow in the address parsing in
483: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 484: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 485: OpenSSH versions prior to 3.7 contains a buffer management error
486: that is potentially exploitable.</a>
1.294 david 487: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 488: Root may be able to reduce the security level by taking advantage of
489: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 490: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 491: An improper bounds check in the kernel may allow a local user
492: to panic the kernel.</a>
1.294 david 493: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 494: An off-by-one error exists in the C library function realpath(3)
495: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 496: </ul>
497:
1.265 miod 498:
1.247 david 499: <p>
1.246 deraadt 500: <li>
1.288 matthieu 501: <a name="32"></a>
1.224 deraadt 502:
1.294 david 503: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 504: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 505: in <a href="anoncvs.html">OpenBSD current</a>. The
506: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 507: you should update your machine.
1.224 deraadt 508: <p>
509: <ul>
1.294 david 510: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 511: The use of certain ASN.1 encodings or malformed public keys may
512: allow an attacker to mount a denial of service attack against
513: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 514: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 515: Access of freed memory in pf(4) could be used to
1.260 margarid 516: remotely panic a machine using scrub rules.</a>
1.294 david 517: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 518: A buffer overflow in the address parsing in
519: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 520: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 521: OpenSSH versions prior to 3.7 contains a buffer management error
522: that is potentially exploitable.</a>
1.294 david 523: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 524: Fix for a potential security issue in
525: sendmail(8) with respect to DNS maps.</a>
1.294 david 526: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 527: An off-by-one error exists in the C library function realpath(3)
528: may allow an attacker to gain escalated privileges.</a>
1.294 david 529: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 530: A buffer overflow in the address parsing in
531: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 532: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 533: A cryptographic weaknesses in the Kerberos v4 protocol can be
534: exploited on Kerberos v5 as well.</a>
1.294 david 535: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 536: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 537: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 538: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 539: Various SSL and TLS operations in OpenSSL are vulnerable to
540: timing attacks.</a>
1.294 david 541: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 542: A buffer overflow in lprm(1) may allow an attacker to elevate
543: privileges to user daemon.</a>.
1.294 david 544: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 545: A buffer overflow in the envelope comments processing in
546: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 547: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 548: httpd(8) leaks file inode numbers via ETag header as well as
549: child PIDs in multipart MIME boundary generation. This could
550: lead, for example, to NFS exploitation because it uses inode
551: numbers as part of the file handle.</a>
1.294 david 552: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 553: In ssl(8) an information leak can occur via timing by performing
554: a MAC computation even if incorrect block cipher padding has
555: been found, this is a countermeasure. Also, check for negative
556: sizes, in allocation routines.</a>
1.294 david 557: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 558: A double free exists in cvs(1) that could lead to privilege
559: escalation for cvs configurations where the cvs command is
1.233 margarid 560: run as a privileged user.</a>
1.294 david 561: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 562: A buffer overflow exists in named(8) that could lead to a
563: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 564: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 565: A logic error in the pool kernel memory allocator could cause
566: memory corruption in low-memory situations, causing the system
567: to crash.</a>
1.294 david 568: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 569: An attacker can bypass smrsh(8)'s restrictions and execute
570: arbitrary commands with the privileges of his own account.</a>
1.294 david 571: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 572: Network bridges running pf with scrubbing enabled could cause
573: mbuf corruption, causing the system to crash.</a>
1.294 david 574: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 575: A buffer overflow can occur in the kadmind(8) daemon, leading
576: to possible remote crash or exploit.</a>
1.224 deraadt 577: </ul>
578:
1.227 miod 579: <p>
580: <li>
1.288 matthieu 581: <a name="31"></a>
1.203 deraadt 582:
1.294 david 583: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 584: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 585: in <a href="anoncvs.html">OpenBSD current</a>. The
586: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 587: you should update your machine.
1.203 deraadt 588:
589: <p>
590: <ul>
1.294 david 591: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 592: A buffer overflow in the address parsing in
593: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 594: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 595: A cryptographic weaknesses in the Kerberos v4 protocol can be
596: exploited on Kerberos v5 as well.</a>
1.294 david 597: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 598: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 599: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 600: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 601: Various SSL and TLS operations in OpenSSL are vulnerable to
602: timing attacks.</a>
1.294 david 603: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 604: A buffer overflow in lprm(1) may allow an attacker to gain
605: root privileges.</a>
1.294 david 606: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 607: A buffer overflow in the envelope comments processing in
608: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 609: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 610: In ssl(8) an information leak can occur via timing by performing
611: a MAC computation even if incorrect block cipher padding has
612: been found, this is a countermeasure. Also, check for negative
613: sizes, in allocation routines.</a>
1.294 david 614: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 615: A double free exists in cvs(1) that could lead to privilege
616: escalation for cvs configurations where the cvs command is
1.294 david 617: run as a privileged user</a>.
618: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 619: A buffer overflow exists in named(8) that could lead to a
620: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 621: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 622: Incorrect argument checking in the getitimer(2) system call
623: may allow an attacker to crash the system.</a>
1.294 david 624: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 625: An attacker can bypass smrsh(8)'s restrictions and execute
626: arbitrary commands with the privileges of his own account.</a>
1.294 david 627: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 628: A buffer overflow can occur in the kadmind(8) daemon, leading
629: to possible remote crash or exploit.</a>
1.294 david 630: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 631: Incorrect argument checking in the setitimer(2) system call
632: may allow an attacker to write to kernel memory.</a>
1.294 david 633: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 634: An insufficient boundary check in the select system call
1.220 miod 635: allows an attacker to overwrite kernel memory and execute arbitrary code
636: in kernel context.</a>
1.294 david 637: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 638: Several remote buffer overflows can occur in the SSL2 server and SSL3
639: client of the ssl(8) library, as in the ASN.1 parser code in the
640: crypto(3) library, all of them being potentially remotely
641: exploitable.</a>
1.294 david 642: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 643: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
644: possible remote crash.</a>
1.294 david 645: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 646: A race condition exists in the pppd(8) daemon which may cause it to
647: alter the file permissions of an arbitrary file.</a>
1.294 david 648: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 649: Receiving IKE payloads out of sequence can cause isakmpd(8) to
650: crash.</a>
1.294 david 651: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 652: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 653: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 654: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 655: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 656: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 657: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 658: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 659: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 660: input validation error that can result in an integer overflow and
661: privilege escalation.</a>
1.294 david 662: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 663: A buffer overflow can occur during the interpretation of chunked
664: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 665: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 666: Under certain conditions, on systems using YP with netgroups
667: in the password database, it is possible that sshd(8) does
668: ACL checks for the requested user name but uses the password
669: database entry of a different user for authentication. This
670: means that denied users might authenticate successfully
671: while permitted users could be locked out.</a>
1.294 david 672: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 673: A race condition exists that could defeat the kernel's
674: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 675: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 676: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 677: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 678: A local user can gain super-user privileges due to a buffer
679: overflow in sshd(8) if AFS has been configured on the system
680: or if KerberosTgtPassing or AFSTokenPassing has been enabled
681: in the sshd_config file.</a>
1.203 deraadt 682: </ul>
683:
1.235 miod 684: <p>
1.203 deraadt 685: <li>
1.288 matthieu 686: <a name="30"></a>
1.187 deraadt 687:
1.294 david 688: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 689: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 690: in <a href="anoncvs.html">OpenBSD current</a>. The
691: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 692: you should update your machine.
1.187 deraadt 693:
694: <p>
695: <ul>
1.294 david 696: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 697: A buffer overflow exists in named(8) that could lead to a
698: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 699: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 700: Incorrect argument checking in the getitimer(2) system call
701: may allow an attacker to crash the system.</a>
1.294 david 702: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 703: An attacker can bypass smrsh(8)'s restrictions and execute
704: arbitrary commands with the privileges of his own account.</a>
1.294 david 705: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 706: A buffer overflow can occur in the kadmind(8) daemon, leading
707: to possible remote crash or exploit.</a>
1.294 david 708: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 709: Incorrect argument checking in the setitimer(2) system call
710: may allow an attacker to write to kernel memory.</a>
1.294 david 711: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 712: An insufficient boundary check in the select and poll system calls
713: allows an attacker to overwrite kernel memory and execute arbitrary code
714: in kernel context.</a>
1.294 david 715: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 716: Several remote buffer overflows can occur in the SSL2 server and SSL3
717: client of the ssl(8) library, as in the ASN.1 parser code in the
718: crypto(3) library, all of them being potentially remotely
719: exploitable.</a>
1.294 david 720: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 721: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
722: possible remote crash.</a>
1.294 david 723: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 724: A race condition exists in the pppd(8) daemon which may cause it to
725: alter the file permissions of an arbitrary file.</a>
1.294 david 726: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 727: Receiving IKE payloads out of sequence can cause isakmpd(8) to
728: crash.</a>
1.294 david 729: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 730: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 731: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 732: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 733: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 734: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 735: input validation error that can result in an integer overflow and
736: privilege escalation.</a>
1.294 david 737: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 738: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 739: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 740: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 741: A buffer overflow can occur during the interpretation of chunked
742: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 743: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 744: A race condition exists that could defeat the kernel's
745: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 746: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 747: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 748: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 749: A local user can gain super-user privileges due to a buffer
750: overflow in sshd(8) if AFS has been configured on the system
751: or if KerberosTgtPassing or AFSTokenPassing has been enabled
752: in the sshd_config file.</a>
1.294 david 753: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 754: The mail(1) was interpreting tilde escapes even when invoked
755: in non-interactive mode. As mail(1) is called as root from cron,
756: this can lead to a local root compromise.</a>
1.294 david 757: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 758: Under certain conditions, on systems using YP with netgroups in
759: the password database, it is possible for the rexecd(8) and rshd(8)
760: daemons to execute a shell from a password database entry for a
761: different user. Similarly, atrun(8) may change to the wrong
762: home directory when running jobs.</a>
1.294 david 763: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 764: A potential double free() exists in the zlib library;
765: this is not exploitable on OpenBSD.
766: The kernel also contains a copy of zlib; it is not
767: currently known if the kernel zlib is exploitable.</a>
1.294 david 768: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 769: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 770: may allow a local user to gain super-user privileges.</a>
1.294 david 771: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 772: A race condition between the ptrace(2) and execve(2) system calls
773: allows an attacker to modify the memory contents of suid/sgid
774: processes which could lead to compromise of the super-user account.</a>
1.294 david 775: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 776: There is a security hole in sudo(8) that can be exploited
777: when the Postfix sendmail replacement is installed that may
778: allow an attacker on the local host to gain root privileges.</a>
1.294 david 779: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 780: An attacker can trick a machine running the lpd daemon into
781: creating new files in the root directory from a machine with
782: remote line printer access.</a>
1.294 david 783: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 784: The vi.recover script can be abused in such a way as
785: to cause arbitrary zero-length files to be removed.</a>
1.294 david 786: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 787: pf(4) was incapable of dealing with certain ipv6 icmp packets,
788: resulting in a crash.</a>
1.294 david 789: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 790: A security hole that may allow an attacker to partially authenticate
791: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 792: </ul>
793:
794: <p>
795: <li>
1.288 matthieu 796: <a name="29"></a>
1.173 deraadt 797:
1.294 david 798: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 799: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 800: in <a href="anoncvs.html">OpenBSD current</a>. The
801: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 802: you should update your machine.
803:
1.173 deraadt 804:
805: <p>
806: <ul>
1.294 david 807: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 808: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 809: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 810: A race condition exists that could defeat the kernel's
811: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 812: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 813: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 814: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 815: A local user can gain super-user privileges due to a buffer
816: overflow in sshd(8) if AFS has been configured on the system
817: or if KerberosTgtPassing or AFSTokenPassing has been enabled
818: in the sshd_config file.</a>
1.294 david 819: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 820: The mail(1) was interpreting tilde escapes even when invoked
821: in non-interactive mode. As mail(1) is called as root from cron,
822: this can lead to a local root compromise.</a>
1.294 david 823: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 824: A potential double free() exists in the zlib library;
825: this is not exploitable on OpenBSD.
826: The kernel also contains a copy of zlib; it is not
827: currently known if the kernel zlib is exploitable.</a>
1.294 david 828: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 829: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 830: may allow a local user to gain super-user privileges.</a>
1.294 david 831: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 832: A race condition between the ptrace(2) and execve(2) system calls
833: allows an attacker to modify the memory contents of suid/sgid
834: processes which could lead to compromise of the super-user account.</a>
1.294 david 835: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 836: There is a security hole in sudo(8) that can be exploited
837: when the Postfix sendmail replacement is installed that may
838: allow an attacker on the local host to gain root privileges.</a>
1.294 david 839: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 840: An attacker can trick a machine running the lpd daemon into
841: creating new files in the root directory from a machine with
842: remote line printer access.</a>
1.294 david 843: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 844: The vi.recover script can be abused in such a way as
845: to cause arbitrary zero-length files to be removed.</a>
1.294 david 846: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 847: A security hole exists in uuxqt(8) that may allow an
848: attacker to gain root privileges.</a>
1.294 david 849: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 850: A security hole exists in lpd(8) that may allow an
851: attacker to gain root privileges if lpd is running.</a>
1.294 david 852: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 853: A security hole exists in sendmail(8) that may allow an
854: attacker on the local host to gain root privileges.</a>
1.294 david 855: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 856: A kernel buffer overflow in the NFS code can be used to execute
857: arbitrary code by users with mount privileges (only root by
1.181 millert 858: default).</a>
1.294 david 859: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 860: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 861: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 862: sshd(8) allows users to delete arbitrary files named "cookies"
863: if X11 forwarding is enabled. X11 forwarding is disabled
864: by default.</a>
1.294 david 865: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 866: Programs using the fts routines can be tricked into changing
867: into the wrong directory.</a>
1.294 david 868: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 869: Sendmail signal handlers contain unsafe code,
870: leading to numerous race conditions.</a>
1.173 deraadt 871: </ul>
872:
873: <p>
874: <li>
1.288 matthieu 875: <a name="28"></a>
1.152 deraadt 876:
1.294 david 877: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 878: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 879: in <a href="anoncvs.html">OpenBSD current</a>. The
880: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 881: you should update your machine.
882:
1.152 deraadt 883:
884: <p>
885: <ul>
1.294 david 886: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 887: A security hole exists in uuxqt(8) that may allow an
888: attacker to gain root privileges.</a>
1.294 david 889: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 890: A security hole exists in lpd(8) that may allow an
891: attacker to gain root privileges if lpd is running.</a>
1.294 david 892: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 893: A security hole exists in sendmail(8) that may allow an
894: attacker on the local host to gain root privileges.</a>
1.294 david 895: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 896: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 897: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 898: Programs using the fts routines can be tricked into changing
899: into the wrong directory.</a>
1.294 david 900: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 901: Sendmail signal handlers contain unsafe code,
902: leading to numerous race conditions.</a>
1.294 david 903: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 904: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 905: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 906: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 907: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 908: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 909: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 910: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 911: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 912: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 913: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 914: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 915: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 916: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 917: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 918: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 919: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 920: rnd(4) did not use all of its input when written to.</a>
1.294 david 921: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 922: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 923: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 924: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 925: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 926: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 927: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 928: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 929: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 930: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 931: </ul>
932:
933: <p>
934: <li>
1.288 matthieu 935: <a name="27"></a>
1.124 deraadt 936:
1.294 david 937: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 938: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 939: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 940: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
941:
942: <p>
943: <ul>
1.294 david 944: <li><a href="errata27.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="errata27.html#sudo">Feb 22, 2001:
1.169 millert 947: a buffer overflow was fixed in sudo(8).</a>
1.294 david 948: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 949: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 950: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 951: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
952: (patch included)</a>
1.294 david 953: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 954: X11 libraries have 2 potential overflows in xtrans code.
955: (patch included)</a>
1.294 david 956: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 957: Apache mod_rewrite and mod_vhost_alias modules could expose files
958: on the server in certain configurations if used.
959: (patch included)</a>
1.294 david 960: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 961: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
962: TERMPATH and TERMCAP environment variables as it should.
963: (patch included)</a>
1.294 david 964: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 965: There are printf-style format string bugs in several privileged
966: programs. (patch included)</a>
1.294 david 967: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 968: libcurses honored terminal descriptions in the $HOME/.terminfo
969: directory as well as in the TERMCAP environment variable for
970: setuid and setgid applications.
1.146 deraadt 971: (patch included)</a>
1.294 david 972: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 973: A format string vulnerability exists in talkd(8).
974: (patch included)</a>
1.294 david 975: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 976: A format string vulnerability exists in the pw_error() function of the
977: libutil library, yielding localhost root through chpass(1).
978: (patch included)</a>
1.294 david 979: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 980: Bad ESP/AH packets could cause a crash under certain conditions.
981: (patch included)</a>
1.294 david 982: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 983: A format string vulnerability (localhost root) exists in xlock(1).
984: (patch included)</a>
1.294 david 985: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 986: Various bugs found in X11 libraries have various side effects, almost
987: completely denial of service in OpenBSD.
988: (patch included)</a>
1.294 david 989: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 990: Just like pretty much all the other unix ftp daemons
991: on the planet, ftpd had a remote root hole in it.
992: Luckily, ftpd was not enabled by default.
1.137 deraadt 993: The problem exists if anonymous ftp is enabled.
1.136 deraadt 994: (patch included)</a>
1.294 david 995: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 996: Mopd, very rarely used, contained some buffer overflows.
997: (patch included)</a>
1.294 david 998: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 999: libedit would check for a <b>.editrc</b> file in the current
1000: directory. Not known to be a real security issue, but a patch
1001: is available anyways.
1002: (patch included)</a>
1.294 david 1003: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1004: A serious bug in dhclient(8) could allow strings from a
1005: malicious dhcp server to be executed in the shell as root.
1006: (patch included)</a>
1.294 david 1007: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1008: A serious bug in isakmpd(8) policy handling wherein
1009: policy verification could be completely bypassed in isakmpd.
1010: (patch included)</a>
1.294 david 1011: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1012: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1013: should not be used, and results in security problems on
1014: other operating systems.</a>
1.294 david 1015: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1016: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1017: (patch included)</a>
1.294 david 1018: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1019: Improper use of ipf <i>keep-state</i> rules can result
1020: in firewall rules being bypassed. (patch included)</a>
1021:
1.124 deraadt 1022: </ul>
1023:
1024: <p>
1025: <li>
1.288 matthieu 1026: <a name="26"></a>
1.119 deraadt 1027:
1.294 david 1028: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1029: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1030: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1031: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1032:
1033: <p>
1034: <ul>
1.294 david 1035: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1036: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1037: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1038: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1039: Improper use of ipf <i>keep-state</i> rules can result
1040: in firewall rules being bypassed. (patch included)</a>
1.294 david 1041: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1042: xlockmore has a bug which a localhost attacker can use to gain
1043: access to the encrypted root password hash (which is normally
1.245 miod 1044: encoded using blowfish</a> (see
1.294 david 1045: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1046: crypt(3)</a>)
1.245 miod 1047: (patch included).
1.294 david 1048: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1049: Systems running with procfs enabled and mounted are
1050: vulnerable to a very tricky exploit. procfs is not
1051: mounted by default.
1052: (patch included).</a>
1.294 david 1053: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1054: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1055: thus exposing the system to a race where the aliases file
1056: did not exist.
1.119 deraadt 1057: (patch included).</a>
1.294 david 1058: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1059: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1060: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1061: A buffer overflow in the RSAREF code included in the
1062: USA version of libssl, is possibly exploitable in
1063: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1064: (patch included).<br></a>
1065: <strong>Update:</strong> Turns out that this was not exploitable
1066: in any of the software included in OpenBSD 2.6.
1.294 david 1067: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1068: Any user could change interface media configurations, resulting in
1069: a localhost denial of service attack.
1.121 deraadt 1070: (patch included).</a>
1.119 deraadt 1071: </ul>
1072:
1073: <p>
1074: <li>
1.288 matthieu 1075: <a name="25"></a>
1.106 deraadt 1076:
1.294 david 1077: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1078: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1079: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1080: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1081:
1.96 deraadt 1082: <p>
1.104 deraadt 1083: <ul>
1.294 david 1084: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1085: In cron(8), make sure argv[] is NULL terminated in the
1086: fake popen() and run sendmail as the user, not as root.
1087: (patch included).</a>
1.294 david 1088: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1089: filesystems had an overrun in their handling of uio_offset
1090: in their readdir() routines. (These filesystems are not
1091: enabled by default). (patch included).</a>
1.294 david 1092: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1093: when we execve() a new process. (patch included).</a>
1.294 david 1094: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1095: been handled by IPsec may be transmitted as cleartext.
1096: PF_KEY SA expirations may leak kernel resources.
1097: (patch included).</a>
1.294 david 1098: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1099: motd re-writing and change the find(1) to use -execdir
1100: (patch included).</a>
1.294 david 1101: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1102: users to chflags(2) or fchflags(2) on character or block devices
1103: which they may currently be the owner of (patch included).</a>
1.294 david 1104: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1105: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1106: </ul>
1107:
1.106 deraadt 1108: <p>
1109: <li>
1.288 matthieu 1110: <a name="24"></a>
1.235 miod 1111:
1.294 david 1112: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1113: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1114: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1115: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1116:
1.96 deraadt 1117: <p>
1.75 deraadt 1118: <ul>
1.294 david 1119: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1120: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1121: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1122: another kernel crash case caused by the <strong>crashme</strong>
1123: program (patch included).</a>
1.294 david 1124: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1125: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1126: (patch included).</a>
1.294 david 1127: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1128: existed in ping(8). (patch included).</a>
1.294 david 1129: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1130: the ipq, which could permit an attacker to cause a crash.
1131: (patch included).</a>
1.294 david 1132: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1133: kernel between accept(2) and select(2) could permit an attacker
1134: to hang sockets from remote.
1135: (patch included).</a>
1.294 david 1136: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1137: bog the machine excessively and cause problems.
1138: (patch included).</a>
1.294 david 1139: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1140: DDB interacted to possibly cause a crash.
1141: (patch included).</a>
1.294 david 1142: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1143: (patch included).</a>
1.294 david 1144: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1145: problem in bootpd(8). (patch included).</a>
1.294 david 1146: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1147: exploitable problem relating to environment variables in termcap
1148: and curses. (patch included).</a>
1.294 david 1149: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1150: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1151: </ul>
1152:
1.106 deraadt 1153: <p>
1154: <li>
1.288 matthieu 1155: <a name="23"></a>
1.235 miod 1156:
1.294 david 1157: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1158: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1159: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1160: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1161:
1.96 deraadt 1162: <p>
1.53 matthieu 1163: <ul>
1.294 david 1164: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1165: problem in bootpd(8). (patch included).</a>
1.294 david 1166: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1167: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1168: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1169: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1170: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1171: chpass(1) has a file descriptor leak which allows an
1172: attacker to modify /etc/master.passwd.</a>
1.294 david 1173: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1174: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1175: should not be executed with fd slots 0, 1, or 2 free.
1176: (patch included).</a>
1.294 david 1177: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1178: libraries (patches included).</a>
1.294 david 1179: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1180: processes too permissive (4th revision patch included).</a>
1.294 david 1181: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1182: of immutable and append-only file flags. (patch included).</a>
1.294 david 1183: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1184: if IPSEC is enabled (patch included).</a>
1.294 david 1185: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1186: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1187: </ul>
1.9 deraadt 1188:
1.106 deraadt 1189: <p>
1190: <li>
1.288 matthieu 1191: <a name="22"></a>
1.235 miod 1192:
1.294 david 1193: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1194: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1195: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1196: still exist in other operating systems. (The supplied patches are for
1197: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1198:
1.96 deraadt 1199: <p>
1.9 deraadt 1200: <ul>
1.294 david 1201: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1202: packets if IPSEC is enabled (patch included).</a>
1.294 david 1203: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1204: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1205: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1206: (patch included).</a>
1.294 david 1207: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1208: (patch included).</a>
1.294 david 1209: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1210: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1211: (patch included).</a>
1.294 david 1212: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1213: export (patch included).</a>
1.112 philen 1214: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1215: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1216: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1217: Acceptance.</a>
1.294 david 1218: A patch is available <a href="errata22.html#sourceroute">here</a>.
1219: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1220: flaw (patch included).</a>
1.294 david 1221: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1222: </ul>
1223:
1.106 deraadt 1224: <p>
1225: <li>
1.288 matthieu 1226: <a name="21"></a>
1.235 miod 1227:
1.294 david 1228: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1229: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1230: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1231: exist in other operating systems. (If you are running OpenBSD 2.1, we
1232: would strongly recommend an upgrade to the newest release, as this
1233: patch list only attempts at fixing the most important security
1234: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1235: security problems. Many of those problems were solved in ways which
1236: make it hard for us to provide patches).
1237:
1.96 deraadt 1238: <p>
1.52 deraadt 1239: <ul>
1.112 philen 1240: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1241: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1242: (patch included)</a>
1.112 philen 1243: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1244: </ul>
1.51 deraadt 1245:
1.106 deraadt 1246: <p>
1247: <li>
1.288 matthieu 1248: <a name="20"></a>
1.235 miod 1249:
1.294 david 1250: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1251: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1252: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1253: exist in other operating systems. (If you are running OpenBSD 2.0, we
1254: commend you for being there back in the old days!, but you're really
1255: missing out if you don't install a new version!)
1256:
1257: <p>
1258: <ul>
1.112 philen 1259: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1260: resolver (patch included)</a>
1261: <li>Many others... if people can hunt them down, please let me know
1262: and we'll put them up here.
1263: </ul>
1.51 deraadt 1264: <p>
1.106 deraadt 1265:
1.288 matthieu 1266: <a name="watching"></a>
1.294 david 1267: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1268:
1.21 deraadt 1269: Since we take a proactive stance with security, we are continually
1270: finding and fixing new security problems. Not all of these problems
1.80 espie 1271: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1272: confirmed to be exploitable; many simple bugs we fix do turn out to
1273: have security consequences we could not predict. We do not have the
1274: time resources to make these changes available in the above format.<p>
1.21 deraadt 1275:
1276: Thus there are usually minor security fixes in the current source code
1277: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1278: guarantee that these problems are of minimal impact and unproven
1.44 ian 1279: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1280: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1281:
1.45 deraadt 1282: People who are really concerned with security can do a number of
1283: things:<p>
1.21 deraadt 1284:
1285: <ul>
1286: <li>If you understand security issues, watch our
1.294 david 1287: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1288: eye out for things which appear security related. Since
1.21 deraadt 1289: exploitability is not proven for many of the fixes we make,
1290: do not expect the relevant commit message to say "SECURITY FIX!".
1291: If a problem is proven and serious, a patch will be available
1292: here very shortly after.
1.161 horacio 1293: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1294: security-announce mailing list</a> which will notify you for every
1.186 ian 1295: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1296: and instruct you on how to patch the problem.
1.21 deraadt 1297: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1298: complete system build from time to time (read /usr/src/Makefile
1299: carefully). Users can make the assumption that the current
1300: source tree always has stronger security than the previous release.
1.45 deraadt 1301: However, building your own system from source code is not trivial;
1.265 miod 1302: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1303: transition between major releases.
1.115 ericj 1304: <li>Install a binary snapshot for your
1.80 espie 1305: architecture, which are made available fairly often. For
1.29 deraadt 1306: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1307: </ul>
1308:
1.9 deraadt 1309: <p>
1.288 matthieu 1310: <a name="reporting"></a>
1.294 david 1311: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1312:
1.5 deraadt 1313: <p> If you find a new security problem, you can mail it to
1.294 david 1314: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1315: <br>
1.5 deraadt 1316: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1317: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1318:
1.107 deraadt 1319: <p>
1.288 matthieu 1320: <a name="papers"></a>
1.294 david 1321: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1322:
1323: A number of papers have been written by OpenBSD team members, about security
1324: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1325: documents are available as follows.<p>
1.107 deraadt 1326:
1327: <ul>
1.113 deraadt 1328: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1329: <a href="events.html#usenix99">Usenix 1999</a>,
1330: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1331: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1332: <a href="papers/bcrypt-paper.ps">paper</a> and
1333: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1334: <p>
1335: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1336: <a href="events.html#usenix99">Usenix 1999</a>,
1337: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1338: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1339: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1340: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1341: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1342: <a href="papers/crypt-paper.ps">paper</a> and
1343: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1344: <p>
1345: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1346: <a href="events.html#usenix99">Usenix 1999</a>,
1347: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1348: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1349: <a href="papers/strlcpy-paper.ps">paper</a> and
1350: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1351: <p>
1.118 deraadt 1352: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1353: <a href="events.html#lisa99">LISA 1999</a>,
1354: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1355: <a href="papers/authgw-paper.ps">paper</a> and
1356: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1357: <p>
1.153 jufi 1358: <li>Encrypting Virtual Memory<br>
1.294 david 1359: <a href="events.html#sec2000">Usenix Security 2000</a>,
1360: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1361: <a href="papers/swapencrypt.ps">paper</a> and
1362: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1363: <p>
1.107 deraadt 1364: </ul>
1.294 david 1365: </ul>
1.106 deraadt 1366:
1.2 deraadt 1367: <hr>
1.294 david 1368: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1369: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1370: <br>
1.317 ! millert 1371: <small>$OpenBSD: security.html,v 1.316 2005/07/08 03:25:36 millert Exp $</small>
1.1 deraadt 1372:
1.24 deraadt 1373: </body>
1374: </html>