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1.210 jsyn 16: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 17: <p>
1.294 david 18: <h2><font color="#e00000">Security</font></h2>
19: <hr>
1.1 deraadt 20:
1.114 philen 21: <table width="100%">
22: <tr>
23: <td colspan="2">
24: <strong>Index</strong>
25: </td>
26: </tr>
27: <tr>
28: <td valign="top">
1.294 david 29: <a href="#goals">Security goals of the Project</a>.<br>
30: <a href="#disclosure">Full Disclosure policy</a>.<br>
31: <a href="#process">Source code auditing process</a>.<br>
32: <a href="#default">"Secure by Default"</a>.<br>
33: <a href="#crypto">Use of Cryptography</a>.<br>
34: <p>
35: <a href="#watching">Watching changes</a>.<br>
36: <a href="#reporting">Reporting security issues</a>.<br>
37: <a href="#papers">Further Reading</a><br>
1.106 deraadt 38: <p>
1.114 philen 39: </td>
40: <td valign="top">
1.225 deraadt 41: For security advisories for specific releases, click below:<br>
42: <a href="#20">2.0</a>,
43: <a href="#21">2.1</a>,
44: <a href="#22">2.2</a>,
45: <a href="#23">2.3</a>,
46: <a href="#24">2.4</a>,
47: <a href="#25">2.5</a>,
48: <a href="#26">2.6</a>,
49: <a href="#27">2.7</a>,
50: <a href="#28">2.8</a>,
51: <a href="#29">2.9</a>,
52: <a href="#30">3.0</a>,
53: <a href="#31">3.1</a>,
1.246 deraadt 54: <a href="#32">3.2</a>,
1.261 david 55: <a href="#33">3.3</a>,
1.280 david 56: <a href="#34">3.4</a>,
1.301 miod 57: <a href="#35">3.5</a>,
1.312 david 58: <a href="#36">3.6</a>,
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>
1.313 ! brad 233: <li><a href="errata.html#cvs">Jun 7, 2005:
! 234: Fix a buffer overflow, memory leaks, and NULL pointer
! 235: dereference in cvs(1).</a>
1.312 david 236: </ul>
237:
238: <li>
1.301 miod 239: <a name="36"></a>
240:
241: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
242: These are the OpenBSD 3.6 advisories -- all these problems are solved
243: in <a href=anoncvs.html>OpenBSD current</a> and the
244: <a href=stable.html>patch branch</a>.
245:
246: <p>
1.302 markus 247: <ul>
1.311 deraadt 248: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 249: Fix a buffer overflow, memory leaks, and NULL pointer
250: dereference in cvs(1).</a>
1.311 deraadt 251: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 252: Due to buffer overflows in telnet(1), a malicious
253: server or man-in-the-middle attack could allow
254: execution of arbitrary code with the privileges of
255: the user invoking telnet(1).</a>
1.311 deraadt 256: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 257: More stringent checking should be done in the copy(9)
258: functions to prevent their misuse.</a>
1.311 deraadt 259: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 260: More stringent checking should be done in the copy(9)
261: functions to prevent their misuse.</a>
1.311 deraadt 262: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 263: httpd(8)'s mod_include module fails to properly validate
264: the length of user supplied tag strings prior to copying
1.305 brad 265: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 266: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 267: On systems running isakmpd(8) it is possible for a local
268: user to cause kernel memory corruption and system panic by
1.303 markus 269: setting ipsec(4) credentials on a socket.</a>
1.302 markus 270: </ul>
1.301 miod 271:
272: <p>
273: <li>
1.288 matthieu 274: <a name="35"></a>
1.279 deraadt 275:
1.294 david 276: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 277: These are the OpenBSD 3.5 advisories -- all these problems are solved
278: in <a href=anoncvs.html>OpenBSD current</a> and the
279: <a href=stable.html>patch branch</a>.
280:
281: <p>
282: <ul>
1.310 brad 283: <li><a href="errata35.html#cvs4">Apr 28, 2005:
284: Fix a buffer overflow, memory leaks, and NULL pointer
285: dereference in cvs(1).</a>
1.309 brad 286: <li><a href="errata35.html#telnet">Mar 30, 2005:
287: Due to buffer overflows in telnet(1), a malicious
288: server or man-in-the-middle attack could allow
289: execution of arbitrary code with the privileges of
290: the user invoking telnet(1).</a>
1.308 brad 291: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 292: More stringent checking should be done in the copy(9)
293: functions to prevent their misuse.</a>
1.306 brad 294: <li><a href="errata35.html#locore">Feb 28, 2005:
295: More stringent checking should be done in the copy(9)
296: functions to prevent their misuse.</a>
1.304 brad 297: <li><a href="errata35.html#httpd3">Jan 12, 2005:
298: httpd(8)'s mod_include module fails to properly validate
299: the length of user supplied tag strings prior to copying
1.305 brad 300: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 301: <li><a href="errata35.html#pfkey">Dec 14, 2004:
302: On systems running isakmpd(8) it is possible for a local
303: user to cause kernel memory corruption and system panic by
1.303 markus 304: setting ipsec(4) credentials on a socket.</a>
1.301 miod 305: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 306: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 307: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 308: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 309: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 310: httpd(8)'s mod_rewrite module can be made to write one zero byte in
311: an arbitrary memory position outside of a char array, causing a DoS
312: or possibly buffer overflows.</a>
1.301 miod 313: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 314: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 315: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 316: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 317: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 318: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 319: Multiple remote vulnerabilities have been found in the cvs(1)
320: server which can be used by CVS clients to crash or execute
1.293 brad 321: arbitrary code on the server.</a>
1.301 miod 322: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 323: kdc(8) performs inadequate checking of request fields, leading
324: to the possibility of principal impersonation from other
325: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 326: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 327: xdm(1) ignores the requestPort resource and creates a
1.293 brad 328: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 329: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 330: A buffer overflow in the cvs(1) server has been found,
331: which can be used by CVS clients to execute arbitrary code on
1.293 brad 332: the server.</a>
1.301 miod 333: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 334: Integer overflow problems were found in procfs, allowing
1.293 brad 335: reading of arbitrary kernel memory.</a>
1.301 miod 336: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 337: Pathname validation problems have been found in cvs(1),
338: allowing clients and servers access to files outside the
1.293 brad 339: repository or local CVS tree.</a>
1.279 deraadt 340: </ul>
341:
342: <p>
1.301 miod 343: OpenBSD 3.4 and earlier releases are not supported anymore. The following
344: paragraphs only list advisories issued while they were maintained; these
345: releases are likely to be affected by the advisories for more recent releases.
346: <br>
347:
1.279 deraadt 348: <li>
1.288 matthieu 349: <a name="34"></a>
1.261 david 350:
1.294 david 351: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 352: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 353: in <a href="anoncvs.html">OpenBSD current</a>. The
354: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
355: you should update your machine.
1.261 david 356: <p>
357: <ul>
1.302 markus 358: <li><a href="errata34.html#pfkey">Dec 14, 2004:
359: On systems running isakmpd(8) it is possible for a local
360: user to cause kernel memory corruption and system panic by
1.303 markus 361: setting ipsec(4) credentials on a socket.</a>
1.298 brad 362: <li><a href="errata34.html#xpm">Sep 16, 2004:
363: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 364: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
365: httpd(8)'s mod_rewrite module can be made to write one zero byte in
366: an arbitrary memory position outside of a char array, causing a DoS
367: or possibly buffer overflows.</a>
1.294 david 368: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 369: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 370: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 371: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 372: an attacker can delete IPsec tunnels at will.</a>
1.294 david 373: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 374: Multiple remote vulnerabilities have been found in the cvs(1)
375: server which can be used by CVS clients to crash or execute
1.293 brad 376: arbitrary code on the server.</a>
1.294 david 377: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 378: kdc(8) performs inadequate checking of request fields, leading
379: to the possibility of principal impersonation from other
380: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 381: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 382: A buffer overflow in the cvs(1) server has been found,
383: which can be used by CVS clients to execute arbitrary code on
384: the server.</a>
1.294 david 385: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 386: Integer overflow problems were found in procfs, allowing
387: reading of arbitrary kernel memory.</a>
1.294 david 388: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 389: Pathname validation problems have been found in cvs(1),
390: allowing clients and servers access to files outside the
391: repository or local CVS tree.</a>
1.294 david 392: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 393: A missing check for a NULL-pointer dereference may allow a
1.281 otto 394: remote attacker to crash applications using OpenSSL.</a>
1.294 david 395: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 396: Defects in the payload validation and processing functions of
397: isakmpd have been discovered. An attacker could send malformed
398: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 399: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 400: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
401: access module, using IP addresses without a netmask on big endian
402: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 403: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 404: An IPv6 MTU handling problem exists that could be used by an
405: attacker to cause a denial of service attack.</a>
1.294 david 406: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 407: A reference counting bug in shmat(2) could be used to write to
408: kernel memory under certain circumstances.</a>
1.294 david 409: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 410: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 411: by Thomas Walpuski.</a>
1.294 david 412: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 413: It may be possible for a local user to overrun the stack in
414: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 415: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 416: The use of certain ASN.1 encodings or malformed public keys may
417: allow an attacker to mount a denial of service attack against
418: applications linked with ssl(3).</a>
1.261 david 419: </ul>
420:
421: <li>
1.288 matthieu 422: <a name="33"></a>
1.246 deraadt 423:
1.294 david 424: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 425: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 426: in <a href="anoncvs.html">OpenBSD current</a>. The
427: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 428: you should update your machine.
1.246 deraadt 429: <p>
430: <ul>
1.294 david 431: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 432: Pathname validation problems have been found in cvs(1),
433: allowing clients and servers access to files outside the
434: repository or local CVS tree.</a>
1.294 david 435: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 436: A missing check for a NULL-pointer dereference may allow a
1.281 otto 437: remote attacker to crash applications using OpenSSL.</a>
1.294 david 438: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 439: Defects in the payload validation and processing functions of
440: isakmpd have been discovered. An attacker could send malformed
441: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 442: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 443: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
444: access module, using IP addresses without a netmask on big endian
445: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 446: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 447: An IPv6 MTU handling problem exists that could be used by an
448: attacker to cause a denial of service attack.</a>
1.294 david 449: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 450: A reference counting bug in shmat(2) could be used to write to
451: kernel memory under certain circumstances.</a>
1.294 david 452: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 453: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 454: by Thomas Walpuski.</a>
1.294 david 455: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 456: It may be possible for a local user to execute arbitrary code
457: resulting in escalation of privileges due to a stack overrun
458: in compat_ibcs2(8).</a>
1.294 david 459: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 460: The use of certain ASN.1 encodings or malformed public keys may
461: allow an attacker to mount a denial of service attack against
462: applications linked with ssl(3).</a>
1.294 david 463: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 464: Access of freed memory in pf(4) could be used to
1.260 margarid 465: remotely panic a machine using scrub rules.</a>
1.294 david 466: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 467: A buffer overflow in the address parsing in
468: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 469: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 470: OpenSSH versions prior to 3.7 contains a buffer management error
471: that is potentially exploitable.</a>
1.294 david 472: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 473: Root may be able to reduce the security level by taking advantage of
474: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 475: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 476: An improper bounds check in the kernel may allow a local user
477: to panic the kernel.</a>
1.294 david 478: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 479: An off-by-one error exists in the C library function realpath(3)
480: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 481: </ul>
482:
1.265 miod 483:
1.247 david 484: <p>
1.246 deraadt 485: <li>
1.288 matthieu 486: <a name="32"></a>
1.224 deraadt 487:
1.294 david 488: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 489: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 490: in <a href="anoncvs.html">OpenBSD current</a>. The
491: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 492: you should update your machine.
1.224 deraadt 493: <p>
494: <ul>
1.294 david 495: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 496: The use of certain ASN.1 encodings or malformed public keys may
497: allow an attacker to mount a denial of service attack against
498: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 499: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 500: Access of freed memory in pf(4) could be used to
1.260 margarid 501: remotely panic a machine using scrub rules.</a>
1.294 david 502: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 503: A buffer overflow in the address parsing in
504: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 505: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 506: OpenSSH versions prior to 3.7 contains a buffer management error
507: that is potentially exploitable.</a>
1.294 david 508: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 509: Fix for a potential security issue in
510: sendmail(8) with respect to DNS maps.</a>
1.294 david 511: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 512: An off-by-one error exists in the C library function realpath(3)
513: may allow an attacker to gain escalated privileges.</a>
1.294 david 514: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 515: A buffer overflow in the address parsing in
516: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 517: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 518: A cryptographic weaknesses in the Kerberos v4 protocol can be
519: exploited on Kerberos v5 as well.</a>
1.294 david 520: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 521: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 522: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 523: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 524: Various SSL and TLS operations in OpenSSL are vulnerable to
525: timing attacks.</a>
1.294 david 526: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 527: A buffer overflow in lprm(1) may allow an attacker to elevate
528: privileges to user daemon.</a>.
1.294 david 529: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 530: A buffer overflow in the envelope comments processing in
531: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 532: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 533: httpd(8) leaks file inode numbers via ETag header as well as
534: child PIDs in multipart MIME boundary generation. This could
535: lead, for example, to NFS exploitation because it uses inode
536: numbers as part of the file handle.</a>
1.294 david 537: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 538: In ssl(8) an information leak can occur via timing by performing
539: a MAC computation even if incorrect block cipher padding has
540: been found, this is a countermeasure. Also, check for negative
541: sizes, in allocation routines.</a>
1.294 david 542: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 543: A double free exists in cvs(1) that could lead to privilege
544: escalation for cvs configurations where the cvs command is
1.233 margarid 545: run as a privileged user.</a>
1.294 david 546: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 547: A buffer overflow exists in named(8) that could lead to a
548: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 549: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 550: A logic error in the pool kernel memory allocator could cause
551: memory corruption in low-memory situations, causing the system
552: to crash.</a>
1.294 david 553: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 554: An attacker can bypass smrsh(8)'s restrictions and execute
555: arbitrary commands with the privileges of his own account.</a>
1.294 david 556: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 557: Network bridges running pf with scrubbing enabled could cause
558: mbuf corruption, causing the system to crash.</a>
1.294 david 559: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 560: A buffer overflow can occur in the kadmind(8) daemon, leading
561: to possible remote crash or exploit.</a>
1.224 deraadt 562: </ul>
563:
1.227 miod 564: <p>
565: <li>
1.288 matthieu 566: <a name="31"></a>
1.203 deraadt 567:
1.294 david 568: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 569: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 570: in <a href="anoncvs.html">OpenBSD current</a>. The
571: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 572: you should update your machine.
1.203 deraadt 573:
574: <p>
575: <ul>
1.294 david 576: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 577: A buffer overflow in the address parsing in
578: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 579: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 580: A cryptographic weaknesses in the Kerberos v4 protocol can be
581: exploited on Kerberos v5 as well.</a>
1.294 david 582: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 583: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 584: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 585: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 586: Various SSL and TLS operations in OpenSSL are vulnerable to
587: timing attacks.</a>
1.294 david 588: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 589: A buffer overflow in lprm(1) may allow an attacker to gain
590: root privileges.</a>
1.294 david 591: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 592: A buffer overflow in the envelope comments processing in
593: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 594: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 595: In ssl(8) an information leak can occur via timing by performing
596: a MAC computation even if incorrect block cipher padding has
597: been found, this is a countermeasure. Also, check for negative
598: sizes, in allocation routines.</a>
1.294 david 599: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 600: A double free exists in cvs(1) that could lead to privilege
601: escalation for cvs configurations where the cvs command is
1.294 david 602: run as a privileged user</a>.
603: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 604: A buffer overflow exists in named(8) that could lead to a
605: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 606: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 607: Incorrect argument checking in the getitimer(2) system call
608: may allow an attacker to crash the system.</a>
1.294 david 609: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 610: An attacker can bypass smrsh(8)'s restrictions and execute
611: arbitrary commands with the privileges of his own account.</a>
1.294 david 612: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 613: A buffer overflow can occur in the kadmind(8) daemon, leading
614: to possible remote crash or exploit.</a>
1.294 david 615: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 616: Incorrect argument checking in the setitimer(2) system call
617: may allow an attacker to write to kernel memory.</a>
1.294 david 618: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 619: An insufficient boundary check in the select system call
1.220 miod 620: allows an attacker to overwrite kernel memory and execute arbitrary code
621: in kernel context.</a>
1.294 david 622: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 623: Several remote buffer overflows can occur in the SSL2 server and SSL3
624: client of the ssl(8) library, as in the ASN.1 parser code in the
625: crypto(3) library, all of them being potentially remotely
626: exploitable.</a>
1.294 david 627: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 628: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
629: possible remote crash.</a>
1.294 david 630: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 631: A race condition exists in the pppd(8) daemon which may cause it to
632: alter the file permissions of an arbitrary file.</a>
1.294 david 633: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 634: Receiving IKE payloads out of sequence can cause isakmpd(8) to
635: crash.</a>
1.294 david 636: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 637: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 638: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 639: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 640: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 641: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 642: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 643: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 644: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 645: input validation error that can result in an integer overflow and
646: privilege escalation.</a>
1.294 david 647: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 648: A buffer overflow can occur during the interpretation of chunked
649: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 650: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 651: Under certain conditions, on systems using YP with netgroups
652: in the password database, it is possible that sshd(8) does
653: ACL checks for the requested user name but uses the password
654: database entry of a different user for authentication. This
655: means that denied users might authenticate successfully
656: while permitted users could be locked out.</a>
1.294 david 657: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 658: A race condition exists that could defeat the kernel's
659: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 660: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 661: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 662: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 663: A local user can gain super-user privileges due to a buffer
664: overflow in sshd(8) if AFS has been configured on the system
665: or if KerberosTgtPassing or AFSTokenPassing has been enabled
666: in the sshd_config file.</a>
1.203 deraadt 667: </ul>
668:
1.235 miod 669: <p>
1.203 deraadt 670: <li>
1.288 matthieu 671: <a name="30"></a>
1.187 deraadt 672:
1.294 david 673: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 674: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 675: in <a href="anoncvs.html">OpenBSD current</a>. The
676: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 677: you should update your machine.
1.187 deraadt 678:
679: <p>
680: <ul>
1.294 david 681: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 682: A buffer overflow exists in named(8) that could lead to a
683: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 684: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 685: Incorrect argument checking in the getitimer(2) system call
686: may allow an attacker to crash the system.</a>
1.294 david 687: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 688: An attacker can bypass smrsh(8)'s restrictions and execute
689: arbitrary commands with the privileges of his own account.</a>
1.294 david 690: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 691: A buffer overflow can occur in the kadmind(8) daemon, leading
692: to possible remote crash or exploit.</a>
1.294 david 693: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 694: Incorrect argument checking in the setitimer(2) system call
695: may allow an attacker to write to kernel memory.</a>
1.294 david 696: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 697: An insufficient boundary check in the select and poll system calls
698: allows an attacker to overwrite kernel memory and execute arbitrary code
699: in kernel context.</a>
1.294 david 700: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 701: Several remote buffer overflows can occur in the SSL2 server and SSL3
702: client of the ssl(8) library, as in the ASN.1 parser code in the
703: crypto(3) library, all of them being potentially remotely
704: exploitable.</a>
1.294 david 705: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 706: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
707: possible remote crash.</a>
1.294 david 708: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 709: A race condition exists in the pppd(8) daemon which may cause it to
710: alter the file permissions of an arbitrary file.</a>
1.294 david 711: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 712: Receiving IKE payloads out of sequence can cause isakmpd(8) to
713: crash.</a>
1.294 david 714: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 715: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 716: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 717: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 718: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 719: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 720: input validation error that can result in an integer overflow and
721: privilege escalation.</a>
1.294 david 722: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 723: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 724: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 725: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 726: A buffer overflow can occur during the interpretation of chunked
727: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 728: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 729: A race condition exists that could defeat the kernel's
730: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 731: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 732: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 733: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 734: A local user can gain super-user privileges due to a buffer
735: overflow in sshd(8) if AFS has been configured on the system
736: or if KerberosTgtPassing or AFSTokenPassing has been enabled
737: in the sshd_config file.</a>
1.294 david 738: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 739: The mail(1) was interpreting tilde escapes even when invoked
740: in non-interactive mode. As mail(1) is called as root from cron,
741: this can lead to a local root compromise.</a>
1.294 david 742: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 743: Under certain conditions, on systems using YP with netgroups in
744: the password database, it is possible for the rexecd(8) and rshd(8)
745: daemons to execute a shell from a password database entry for a
746: different user. Similarly, atrun(8) may change to the wrong
747: home directory when running jobs.</a>
1.294 david 748: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 749: A potential double free() exists in the zlib library;
750: this is not exploitable on OpenBSD.
751: The kernel also contains a copy of zlib; it is not
752: currently known if the kernel zlib is exploitable.</a>
1.294 david 753: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 754: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 755: may allow a local user to gain super-user privileges.</a>
1.294 david 756: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 757: A race condition between the ptrace(2) and execve(2) system calls
758: allows an attacker to modify the memory contents of suid/sgid
759: processes which could lead to compromise of the super-user account.</a>
1.294 david 760: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 761: There is a security hole in sudo(8) that can be exploited
762: when the Postfix sendmail replacement is installed that may
763: allow an attacker on the local host to gain root privileges.</a>
1.294 david 764: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 765: An attacker can trick a machine running the lpd daemon into
766: creating new files in the root directory from a machine with
767: remote line printer access.</a>
1.294 david 768: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 769: The vi.recover script can be abused in such a way as
770: to cause arbitrary zero-length files to be removed.</a>
1.294 david 771: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 772: pf(4) was incapable of dealing with certain ipv6 icmp packets,
773: resulting in a crash.</a>
1.294 david 774: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 775: A security hole that may allow an attacker to partially authenticate
776: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 777: </ul>
778:
779: <p>
780: <li>
1.288 matthieu 781: <a name="29"></a>
1.173 deraadt 782:
1.294 david 783: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 784: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 785: in <a href="anoncvs.html">OpenBSD current</a>. The
786: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 787: you should update your machine.
788:
1.173 deraadt 789:
790: <p>
791: <ul>
1.294 david 792: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 793: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 794: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 795: A race condition exists that could defeat the kernel's
796: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 797: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 798: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 799: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 800: A local user can gain super-user privileges due to a buffer
801: overflow in sshd(8) if AFS has been configured on the system
802: or if KerberosTgtPassing or AFSTokenPassing has been enabled
803: in the sshd_config file.</a>
1.294 david 804: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 805: The mail(1) was interpreting tilde escapes even when invoked
806: in non-interactive mode. As mail(1) is called as root from cron,
807: this can lead to a local root compromise.</a>
1.294 david 808: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 809: A potential double free() exists in the zlib library;
810: this is not exploitable on OpenBSD.
811: The kernel also contains a copy of zlib; it is not
812: currently known if the kernel zlib is exploitable.</a>
1.294 david 813: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 814: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 815: may allow a local user to gain super-user privileges.</a>
1.294 david 816: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 817: A race condition between the ptrace(2) and execve(2) system calls
818: allows an attacker to modify the memory contents of suid/sgid
819: processes which could lead to compromise of the super-user account.</a>
1.294 david 820: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 821: There is a security hole in sudo(8) that can be exploited
822: when the Postfix sendmail replacement is installed that may
823: allow an attacker on the local host to gain root privileges.</a>
1.294 david 824: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 825: An attacker can trick a machine running the lpd daemon into
826: creating new files in the root directory from a machine with
827: remote line printer access.</a>
1.294 david 828: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 829: The vi.recover script can be abused in such a way as
830: to cause arbitrary zero-length files to be removed.</a>
1.294 david 831: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 832: A security hole exists in uuxqt(8) that may allow an
833: attacker to gain root privileges.</a>
1.294 david 834: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 835: A security hole exists in lpd(8) that may allow an
836: attacker to gain root privileges if lpd is running.</a>
1.294 david 837: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 838: A security hole exists in sendmail(8) that may allow an
839: attacker on the local host to gain root privileges.</a>
1.294 david 840: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 841: A kernel buffer overflow in the NFS code can be used to execute
842: arbitrary code by users with mount privileges (only root by
1.181 millert 843: default).</a>
1.294 david 844: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 845: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 846: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 847: sshd(8) allows users to delete arbitrary files named "cookies"
848: if X11 forwarding is enabled. X11 forwarding is disabled
849: by default.</a>
1.294 david 850: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 851: Programs using the fts routines can be tricked into changing
852: into the wrong directory.</a>
1.294 david 853: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 854: Sendmail signal handlers contain unsafe code,
855: leading to numerous race conditions.</a>
1.173 deraadt 856: </ul>
857:
858: <p>
859: <li>
1.288 matthieu 860: <a name="28"></a>
1.152 deraadt 861:
1.294 david 862: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 863: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 864: in <a href="anoncvs.html">OpenBSD current</a>. The
865: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 866: you should update your machine.
867:
1.152 deraadt 868:
869: <p>
870: <ul>
1.294 david 871: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 872: A security hole exists in uuxqt(8) that may allow an
873: attacker to gain root privileges.</a>
1.294 david 874: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 875: A security hole exists in lpd(8) that may allow an
876: attacker to gain root privileges if lpd is running.</a>
1.294 david 877: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 878: A security hole exists in sendmail(8) that may allow an
879: attacker on the local host to gain root privileges.</a>
1.294 david 880: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 881: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 882: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 883: Programs using the fts routines can be tricked into changing
884: into the wrong directory.</a>
1.294 david 885: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 886: Sendmail signal handlers contain unsafe code,
887: leading to numerous race conditions.</a>
1.294 david 888: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 889: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 890: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 891: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 892: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 893: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 894: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 895: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 896: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 897: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 898: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 899: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 900: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 901: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 902: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 903: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 904: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 905: rnd(4) did not use all of its input when written to.</a>
1.294 david 906: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 907: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 908: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 909: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 910: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 911: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 912: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 913: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 914: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 915: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 916: </ul>
917:
918: <p>
919: <li>
1.288 matthieu 920: <a name="27"></a>
1.124 deraadt 921:
1.294 david 922: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 923: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 924: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 925: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
926:
927: <p>
928: <ul>
1.294 david 929: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 930: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 931: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 932: a buffer overflow was fixed in sudo(8).</a>
1.294 david 933: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 934: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 935: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 936: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
937: (patch included)</a>
1.294 david 938: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 939: X11 libraries have 2 potential overflows in xtrans code.
940: (patch included)</a>
1.294 david 941: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 942: Apache mod_rewrite and mod_vhost_alias modules could expose files
943: on the server in certain configurations if used.
944: (patch included)</a>
1.294 david 945: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 946: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
947: TERMPATH and TERMCAP environment variables as it should.
948: (patch included)</a>
1.294 david 949: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 950: There are printf-style format string bugs in several privileged
951: programs. (patch included)</a>
1.294 david 952: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 953: libcurses honored terminal descriptions in the $HOME/.terminfo
954: directory as well as in the TERMCAP environment variable for
955: setuid and setgid applications.
1.146 deraadt 956: (patch included)</a>
1.294 david 957: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 958: A format string vulnerability exists in talkd(8).
959: (patch included)</a>
1.294 david 960: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 961: A format string vulnerability exists in the pw_error() function of the
962: libutil library, yielding localhost root through chpass(1).
963: (patch included)</a>
1.294 david 964: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 965: Bad ESP/AH packets could cause a crash under certain conditions.
966: (patch included)</a>
1.294 david 967: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 968: A format string vulnerability (localhost root) exists in xlock(1).
969: (patch included)</a>
1.294 david 970: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 971: Various bugs found in X11 libraries have various side effects, almost
972: completely denial of service in OpenBSD.
973: (patch included)</a>
1.294 david 974: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 975: Just like pretty much all the other unix ftp daemons
976: on the planet, ftpd had a remote root hole in it.
977: Luckily, ftpd was not enabled by default.
1.137 deraadt 978: The problem exists if anonymous ftp is enabled.
1.136 deraadt 979: (patch included)</a>
1.294 david 980: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 981: Mopd, very rarely used, contained some buffer overflows.
982: (patch included)</a>
1.294 david 983: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 984: libedit would check for a <b>.editrc</b> file in the current
985: directory. Not known to be a real security issue, but a patch
986: is available anyways.
987: (patch included)</a>
1.294 david 988: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 989: A serious bug in dhclient(8) could allow strings from a
990: malicious dhcp server to be executed in the shell as root.
991: (patch included)</a>
1.294 david 992: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 993: A serious bug in isakmpd(8) policy handling wherein
994: policy verification could be completely bypassed in isakmpd.
995: (patch included)</a>
1.294 david 996: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 997: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
998: should not be used, and results in security problems on
999: other operating systems.</a>
1.294 david 1000: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1001: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1002: (patch included)</a>
1.294 david 1003: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1004: Improper use of ipf <i>keep-state</i> rules can result
1005: in firewall rules being bypassed. (patch included)</a>
1006:
1.124 deraadt 1007: </ul>
1008:
1009: <p>
1010: <li>
1.288 matthieu 1011: <a name="26"></a>
1.119 deraadt 1012:
1.294 david 1013: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1014: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1015: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1016: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1017:
1018: <p>
1019: <ul>
1.294 david 1020: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1021: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1022: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1023: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1024: Improper use of ipf <i>keep-state</i> rules can result
1025: in firewall rules being bypassed. (patch included)</a>
1.294 david 1026: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1027: xlockmore has a bug which a localhost attacker can use to gain
1028: access to the encrypted root password hash (which is normally
1.245 miod 1029: encoded using blowfish</a> (see
1.294 david 1030: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1031: crypt(3)</a>)
1.245 miod 1032: (patch included).
1.294 david 1033: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1034: Systems running with procfs enabled and mounted are
1035: vulnerable to a very tricky exploit. procfs is not
1036: mounted by default.
1037: (patch included).</a>
1.294 david 1038: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1039: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1040: thus exposing the system to a race where the aliases file
1041: did not exist.
1.119 deraadt 1042: (patch included).</a>
1.294 david 1043: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1044: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1045: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1046: A buffer overflow in the RSAREF code included in the
1047: USA version of libssl, is possibly exploitable in
1048: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1049: (patch included).<br></a>
1050: <strong>Update:</strong> Turns out that this was not exploitable
1051: in any of the software included in OpenBSD 2.6.
1.294 david 1052: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1053: Any user could change interface media configurations, resulting in
1054: a localhost denial of service attack.
1.121 deraadt 1055: (patch included).</a>
1.119 deraadt 1056: </ul>
1057:
1058: <p>
1059: <li>
1.288 matthieu 1060: <a name="25"></a>
1.106 deraadt 1061:
1.294 david 1062: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1063: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1064: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1065: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1066:
1.96 deraadt 1067: <p>
1.104 deraadt 1068: <ul>
1.294 david 1069: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1070: In cron(8), make sure argv[] is NULL terminated in the
1071: fake popen() and run sendmail as the user, not as root.
1072: (patch included).</a>
1.294 david 1073: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1074: filesystems had an overrun in their handling of uio_offset
1075: in their readdir() routines. (These filesystems are not
1076: enabled by default). (patch included).</a>
1.294 david 1077: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1078: when we execve() a new process. (patch included).</a>
1.294 david 1079: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1080: been handled by IPsec may be transmitted as cleartext.
1081: PF_KEY SA expirations may leak kernel resources.
1082: (patch included).</a>
1.294 david 1083: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1084: motd re-writing and change the find(1) to use -execdir
1085: (patch included).</a>
1.294 david 1086: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1087: users to chflags(2) or fchflags(2) on character or block devices
1088: which they may currently be the owner of (patch included).</a>
1.294 david 1089: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1090: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1091: </ul>
1092:
1.106 deraadt 1093: <p>
1094: <li>
1.288 matthieu 1095: <a name="24"></a>
1.235 miod 1096:
1.294 david 1097: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1098: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1099: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1100: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1101:
1.96 deraadt 1102: <p>
1.75 deraadt 1103: <ul>
1.294 david 1104: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1105: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1106: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1107: another kernel crash case caused by the <strong>crashme</strong>
1108: program (patch included).</a>
1.294 david 1109: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1110: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1111: (patch included).</a>
1.294 david 1112: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1113: existed in ping(8). (patch included).</a>
1.294 david 1114: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1115: the ipq, which could permit an attacker to cause a crash.
1116: (patch included).</a>
1.294 david 1117: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1118: kernel between accept(2) and select(2) could permit an attacker
1119: to hang sockets from remote.
1120: (patch included).</a>
1.294 david 1121: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1122: bog the machine excessively and cause problems.
1123: (patch included).</a>
1.294 david 1124: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1125: DDB interacted to possibly cause a crash.
1126: (patch included).</a>
1.294 david 1127: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1128: (patch included).</a>
1.294 david 1129: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1130: problem in bootpd(8). (patch included).</a>
1.294 david 1131: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1132: exploitable problem relating to environment variables in termcap
1133: and curses. (patch included).</a>
1.294 david 1134: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1135: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1136: </ul>
1137:
1.106 deraadt 1138: <p>
1139: <li>
1.288 matthieu 1140: <a name="23"></a>
1.235 miod 1141:
1.294 david 1142: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1143: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1144: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1145: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1146:
1.96 deraadt 1147: <p>
1.53 matthieu 1148: <ul>
1.294 david 1149: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1150: problem in bootpd(8). (patch included).</a>
1.294 david 1151: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1152: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1153: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1154: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1155: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1156: chpass(1) has a file descriptor leak which allows an
1157: attacker to modify /etc/master.passwd.</a>
1.294 david 1158: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1159: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1160: should not be executed with fd slots 0, 1, or 2 free.
1161: (patch included).</a>
1.294 david 1162: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1163: libraries (patches included).</a>
1.294 david 1164: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1165: processes too permissive (4th revision patch included).</a>
1.294 david 1166: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1167: of immutable and append-only file flags. (patch included).</a>
1.294 david 1168: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1169: if IPSEC is enabled (patch included).</a>
1.294 david 1170: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1171: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1172: </ul>
1.9 deraadt 1173:
1.106 deraadt 1174: <p>
1175: <li>
1.288 matthieu 1176: <a name="22"></a>
1.235 miod 1177:
1.294 david 1178: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1179: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1180: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1181: still exist in other operating systems. (The supplied patches are for
1182: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1183:
1.96 deraadt 1184: <p>
1.9 deraadt 1185: <ul>
1.294 david 1186: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1187: packets if IPSEC is enabled (patch included).</a>
1.294 david 1188: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1189: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1190: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1191: (patch included).</a>
1.294 david 1192: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1193: (patch included).</a>
1.294 david 1194: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1195: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1196: (patch included).</a>
1.294 david 1197: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1198: export (patch included).</a>
1.112 philen 1199: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1200: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1201: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1202: Acceptance.</a>
1.294 david 1203: A patch is available <a href="errata22.html#sourceroute">here</a>.
1204: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1205: flaw (patch included).</a>
1.294 david 1206: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1207: </ul>
1208:
1.106 deraadt 1209: <p>
1210: <li>
1.288 matthieu 1211: <a name="21"></a>
1.235 miod 1212:
1.294 david 1213: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1214: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1215: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1216: exist in other operating systems. (If you are running OpenBSD 2.1, we
1217: would strongly recommend an upgrade to the newest release, as this
1218: patch list only attempts at fixing the most important security
1219: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1220: security problems. Many of those problems were solved in ways which
1221: make it hard for us to provide patches).
1222:
1.96 deraadt 1223: <p>
1.52 deraadt 1224: <ul>
1.112 philen 1225: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1226: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1227: (patch included)</a>
1.112 philen 1228: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1229: </ul>
1.51 deraadt 1230:
1.106 deraadt 1231: <p>
1232: <li>
1.288 matthieu 1233: <a name="20"></a>
1.235 miod 1234:
1.294 david 1235: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1236: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1237: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1238: exist in other operating systems. (If you are running OpenBSD 2.0, we
1239: commend you for being there back in the old days!, but you're really
1240: missing out if you don't install a new version!)
1241:
1242: <p>
1243: <ul>
1.112 philen 1244: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1245: resolver (patch included)</a>
1246: <li>Many others... if people can hunt them down, please let me know
1247: and we'll put them up here.
1248: </ul>
1.51 deraadt 1249: <p>
1.106 deraadt 1250:
1.288 matthieu 1251: <a name="watching"></a>
1.294 david 1252: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1253:
1.21 deraadt 1254: Since we take a proactive stance with security, we are continually
1255: finding and fixing new security problems. Not all of these problems
1.80 espie 1256: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1257: confirmed to be exploitable; many simple bugs we fix do turn out to
1258: have security consequences we could not predict. We do not have the
1259: time resources to make these changes available in the above format.<p>
1.21 deraadt 1260:
1261: Thus there are usually minor security fixes in the current source code
1262: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1263: guarantee that these problems are of minimal impact and unproven
1.44 ian 1264: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1265: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1266:
1.45 deraadt 1267: People who are really concerned with security can do a number of
1268: things:<p>
1.21 deraadt 1269:
1270: <ul>
1271: <li>If you understand security issues, watch our
1.294 david 1272: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1273: eye out for things which appear security related. Since
1.21 deraadt 1274: exploitability is not proven for many of the fixes we make,
1275: do not expect the relevant commit message to say "SECURITY FIX!".
1276: If a problem is proven and serious, a patch will be available
1277: here very shortly after.
1.161 horacio 1278: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1279: security-announce mailing list</a> which will notify you for every
1.186 ian 1280: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1281: and instruct you on how to patch the problem.
1.21 deraadt 1282: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1283: complete system build from time to time (read /usr/src/Makefile
1284: carefully). Users can make the assumption that the current
1285: source tree always has stronger security than the previous release.
1.45 deraadt 1286: However, building your own system from source code is not trivial;
1.265 miod 1287: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1288: transition between major releases.
1.115 ericj 1289: <li>Install a binary snapshot for your
1.80 espie 1290: architecture, which are made available fairly often. For
1.29 deraadt 1291: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1292: </ul>
1293:
1.9 deraadt 1294: <p>
1.288 matthieu 1295: <a name="reporting"></a>
1.294 david 1296: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1297:
1.5 deraadt 1298: <p> If you find a new security problem, you can mail it to
1.294 david 1299: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1300: <br>
1.5 deraadt 1301: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1302: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1303:
1.107 deraadt 1304: <p>
1.288 matthieu 1305: <a name="papers"></a>
1.294 david 1306: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1307:
1308: A number of papers have been written by OpenBSD team members, about security
1309: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1310: documents are available as follows.<p>
1.107 deraadt 1311:
1312: <ul>
1.113 deraadt 1313: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1314: <a href="events.html#usenix99">Usenix 1999</a>,
1315: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1316: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1317: <a href="papers/bcrypt-paper.ps">paper</a> and
1318: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1319: <p>
1320: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1321: <a href="events.html#usenix99">Usenix 1999</a>,
1322: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1323: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1324: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1325: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1326: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1327: <a href="papers/crypt-paper.ps">paper</a> and
1328: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1329: <p>
1330: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1331: <a href="events.html#usenix99">Usenix 1999</a>,
1332: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1333: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1334: <a href="papers/strlcpy-paper.ps">paper</a> and
1335: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1336: <p>
1.118 deraadt 1337: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1338: <a href="events.html#lisa99">LISA 1999</a>,
1339: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1340: <a href="papers/authgw-paper.ps">paper</a> and
1341: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1342: <p>
1.153 jufi 1343: <li>Encrypting Virtual Memory<br>
1.294 david 1344: <a href="events.html#sec2000">Usenix Security 2000</a>,
1345: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1346: <a href="papers/swapencrypt.ps">paper</a> and
1347: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1348: <p>
1.107 deraadt 1349: </ul>
1.294 david 1350: </ul>
1.106 deraadt 1351:
1.2 deraadt 1352: <hr>
1.294 david 1353: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1354: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1355: <br>
1.313 ! brad 1356: <small>$OpenBSD: security.html,v 1.312 2005/05/18 02:43:33 david Exp $</small>
1.1 deraadt 1357:
1.24 deraadt 1358: </body>
1359: </html>
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