Annotation of www/security.html, Revision 1.293
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1.210 jsyn 14: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 15: <p>
1.110 deraadt 16: <h2><font color=#e00000>Security</font><hr></h2>
1.1 deraadt 17:
1.114 philen 18: <table width="100%">
19: <tr>
20: <td colspan="2">
21: <strong>Index</strong>
22: </td>
23: </tr>
24: <tr>
25: <td valign="top">
1.106 deraadt 26: <a href=#goals>Security goals of the Project</a>.<br>
27: <a href=#disclosure>Full Disclosure policy</a>.<br>
28: <a href=#process>Source code auditing process</a>.<br>
1.111 aaron 29: <a href=#default>"Secure by Default"</a>.<br>
1.106 deraadt 30: <a href=#crypto>Use of Cryptography</a>.<br>
31: <p>
32: <a href=#watching>Watching changes</a>.<br>
33: <a href=#reporting>Reporting security issues</a>.<br>
1.107 deraadt 34: <a href=#papers>Further Reading</a><br>
1.106 deraadt 35: <p>
1.114 philen 36: </td>
37: <td valign="top">
1.225 deraadt 38: For security advisories for specific releases, click below:<br>
39: <a href="#20">2.0</a>,
40: <a href="#21">2.1</a>,
41: <a href="#22">2.2</a>,
42: <a href="#23">2.3</a>,
43: <a href="#24">2.4</a>,
44: <a href="#25">2.5</a>,
45: <a href="#26">2.6</a>,
46: <a href="#27">2.7</a>,
47: <a href="#28">2.8</a>,
48: <a href="#29">2.9</a>,
49: <a href="#30">3.0</a>,
50: <a href="#31">3.1</a>,
1.246 deraadt 51: <a href="#32">3.2</a>,
1.261 david 52: <a href="#33">3.3</a>,
1.280 david 53: <a href="#34">3.4</a>,
54: <a href="#35">3.5</a>.
1.114 philen 55: </td>
56: </tr>
57: </table>
1.56 deraadt 58: <hr>
59:
1.278 deraadt 60: <ul>
1.288 matthieu 61: <a name="goals"></a>
1.110 deraadt 62: <li><h3><font color=#e00000>Goal</font></h3><p>
1.22 deraadt 63:
1.14 deraadt 64: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 65: ONE in the industry for security (if we are not already there). Our
66: open software development model permits us to take a more
67: uncompromising view towards increased security than Sun, SGI, IBM, HP,
68: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 69: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 70: cryptography</a>, we are able to take cryptographic approaches towards
71: fixing security problems.<p>
1.18 deraadt 72:
1.288 matthieu 73: <a name="disclosure"></a>
1.110 deraadt 74: <li><h3><font color=#e00000>Full Disclosure</font></h3><p>
1.106 deraadt 75:
1.45 deraadt 76: Like many readers of the
1.196 jufi 77: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 78: BUGTRAQ mailing list</a>,
1.106 deraadt 79: we believe in full disclosure of security problems. In the
80: operating system arena, we were probably the first to embrace
81: the concept. Many vendors, even of free software, still try
82: to hide issues from their users.<p>
83:
84: Security information moves very fast in cracker circles. On the other
85: hand, our experience is that coding and releasing of proper security
86: fixes typically requires about an hour of work -- very fast fix
87: turnaround is possible. Thus we think that full disclosure helps the
88: people who really care about security.<p>
89:
1.288 matthieu 90: <a name="process"></a>
1.110 deraadt 91: <li><h3><font color=#e00000>Audit Process</font></h3><p>
1.15 deraadt 92:
1.12 deraadt 93: Our security auditing team typically has between six and twelve
1.45 deraadt 94: members who continue to search for and fix new security holes. We
95: have been auditing since the summer of 1996. The process we follow to
96: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 97: every critical software component. We are not so much looking for
98: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 99: years later someone discovers the problem used to be a security
1.106 deraadt 100: issue, and we fixed it because it was just a bug, well, all the
101: better. Flaws have been found in just about every area of the system.
102: Entire new classes of security problems have been found during our
103: audit, and often source code which had been audited earlier needs
104: re-auditing with these new flaws in mind. Code often gets audited
105: multiple times, and by multiple people with different auditing
106: skills.<p>
1.12 deraadt 107:
1.94 deraadt 108: Some members of our security auditing team worked for Secure Networks,
109: the company that made the industry's premier network security scanning
110: software package Ballista (Secure Networks got purchased by Network
111: Associates, Ballista got renamed to Cybercop Scanner, and well...)
112: That company did a lot of security research, and thus fit in well
1.106 deraadt 113: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
114: colours since day 1.<p>
1.31 deraadt 115:
1.34 deraadt 116: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 117: In most cases we have found that the determination of exploitability
118: is not an issue. During our ongoing auditing process we find many
119: bugs, and endeavor to fix them even though exploitability is not
120: proven. We fix the bug, and we move on to find other bugs to fix. We
121: have fixed many simple and obvious careless programming errors in code
122: and only months later discovered that the problems were in fact
123: exploitable. (Or, more likely someone on
1.197 jufi 124: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 125: would report that other operating systems were vulnerable to a `newly
126: discovered problem', and then it would be discovered that OpenBSD had
127: been fixed in a previous release). In other cases we have been saved
128: from full exploitability of complex step-by-step attacks because we
129: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 130: managed such a success is the lpd advisory that Secure Networks put out.
131: <p>
1.29 deraadt 132:
1.288 matthieu 133: <a name="newtech"></a>
1.278 deraadt 134: <li><h3><font color=#e00000>New Technologies</font></h3><p>
135:
136: As we audit source code, we often invent new ways of solving problems.
137: Sometimes these ideas have been used before in some random application
138: written somewhere, but perhaps not taken to the degree that we do.
139: <p>
140:
141: <ul>
142: <li>strlcpy() and strlcat()
143: <li>Memory protection purify
144: <ul>
145: <li>W^X
146: <li>.rodata segment
147: <li>Guard pages
148: <li>Randomized malloc()
149: <li>Randomized mmap()
150: <li>atexit() and stdio protection
151: </ul>
152: <li>Privilege seperation
153: <li>Privilege revocation
154: <li>Chroot jailing
155: <li>New uids
156: <li>ProPolice
157: <li>... and others
158: </ul>
159: <p>
160:
1.110 deraadt 161: <li><h3><font color=#e00000>The Reward</font></h3><p>
1.106 deraadt 162:
1.45 deraadt 163: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 164: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 165: commonplace in security forums like
1.197 jufi 166: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 167:
1.45 deraadt 168: The most intense part of our security auditing happened immediately
1.80 espie 169: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 170: over the last third of 1996 and first half of 1997. Thousands (yes,
171: thousands) of security issues were fixed rapidly over this year-long
172: period; bugs like the standard buffer overflows, protocol
173: implementation weaknesses, information gathering, and filesystem
174: races. Hence most of the security problems that we encountered were
175: fixed before our 2.1 release, and then a far smaller number needed
176: fixing for our 2.2 release. We do not find as many problems anymore,
177: it is simply a case of diminishing returns. Recently the security
178: problems we find and fix tend to be significantly more obscure or
179: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 180:
1.35 deraadt 181: <ul>
1.45 deraadt 182: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 183: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 184: to search for more complicated exploits, so we will too.
185: <li>Finding and fixing subtle flaws in complicated software is
186: a lot of fun.
1.35 deraadt 187: </ul>
1.106 deraadt 188: <p>
1.15 deraadt 189:
1.14 deraadt 190: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 191: to find and fix new security flaws.<p>
1.12 deraadt 192:
1.288 matthieu 193: <a name="default"></a>
1.110 deraadt 194: <li><h3><font color=#e00000>"Secure by Default"</font></h3><p>
1.106 deraadt 195:
196: To ensure that novice users of OpenBSD do not need to become security
197: experts overnight (a viewpoint which other vendors seem to have), we
198: ship the operating system in a Secure by Default mode. All non-essential
199: services are disabled. As the user/administrator becomes more familiar
200: with the system, he will discover that he has to enable daemons and other
201: parts of the system. During the process of learning how to enable a new
202: service, the novice is more likely to learn of security considerations.<p>
203:
204: This is in stark contrast to the increasing number of systems that
205: ship with NFS, mountd, web servers, and various other services enabled
206: by default, creating instantaneous security problems for their users
207: within minutes after their first install.<p>
208:
1.288 matthieu 209: <a name="crypto"></a>
1.110 deraadt 210: <li><h3><font color=#e00000>Cryptography</font></h3><p>
1.106 deraadt 211:
212: And of course, since the OpenBSD project is based in Canada, it is possible
213: for us to integrate cryptography. For more information, read the page
1.116 deraadt 214: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 215:
1.110 deraadt 216: <li><h3><font color=#e00000>Advisories</font></h3><p>
1.106 deraadt 217:
218: <li>
1.288 matthieu 219: <a name="35"></a>
1.279 deraadt 220:
221: <h3><font color=#e00000>OpenBSD 3.5 Security Advisories</font></h3>
222: These are the OpenBSD 3.5 advisories -- all these problems are solved
223: in <a href=anoncvs.html>OpenBSD current</a> and the
224: <a href=stable.html>patch branch</a>.
225:
226: <p>
227: <ul>
1.293 ! brad 228: <li><a href=errata.html#httpd> Jun 12, 2004:
! 229: Multiple vulnerabilites have been found in httpd(8) / mod_ssl.</a>
1.291 hshoexer 230: <li><a href=errata.html#isakmpd> Jun 10, 2004:
231: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 ! brad 232: an attacker can delete IPsec tunnels at will.</a>
1.290 millert 233: <li><a href=errata.html#cvs3> Jun 9, 2004:
234: Multiple remote vulnerabilities have been found in the cvs(1)
235: server which can be used by CVS clients to crash or execute
1.293 ! brad 236: arbitrary code on the server.</a>
1.289 beck 237: <li><a href=errata.html#kerberos> May 30, 2004:
238: kdc(8) performs inadequate checking of request fields, leading
239: to the possibility of principal impersonation from other
240: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.287 matthieu 241: <li><a href=errata.html#xdm> May 26, 2004:
242: xdm(1) ignores the requestPort resource and creates a
1.293 ! brad 243: listening socket regardless of the setting in xdm-config.</a>
1.286 otto 244: <li><a href=errata.html#cvs2> May 20, 2004:
245: A buffer overflow in the cvs(1) server has been found,
246: which can be used by CVS clients to execute arbitrary code on
1.293 ! brad 247: the server.</a>
1.282 tedu 248: <li><a href=errata.html#procfs> May 13, 2004:
249: Integer overflow problems were found in procfs, allowing
1.293 ! brad 250: reading of arbitrary kernel memory.</a>
1.281 otto 251: <li><a href=errata.html#cvs> May 5, 2004:
252: Pathname validation problems have been found in cvs(1),
253: allowing clients and servers access to files outside the
1.293 ! brad 254: repository or local CVS tree.</a>
1.279 deraadt 255: </ul>
256:
257: <p>
258: <li>
1.288 matthieu 259: <a name="34"></a>
1.261 david 260:
261: <h3><font color=#e00000>OpenBSD 3.4 Security Advisories</font></h3>
262: These are the OpenBSD 3.4 advisories -- all these problems are solved
263: in <a href=anoncvs.html>OpenBSD current</a> and the
264: <a href=stable.html>patch branch</a>.
265:
266: <p>
267: <ul>
1.293 ! brad 268: <li><a href=errata34.html#httpd3> Jun 12, 2004:
! 269: Multiple vulnerabilites have been found in httpd(8) / mod_ssl.</a>
1.292 brad 270: <li><a href=errata34.html#isakmpd3> Jun 10, 2004:
271: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 ! brad 272: an attacker can delete IPsec tunnels at will.</a>
1.290 millert 273: <li><a href=errata34.html#cvs3> Jun 9, 2004:
274: Multiple remote vulnerabilities have been found in the cvs(1)
275: server which can be used by CVS clients to crash or execute
1.293 ! brad 276: arbitrary code on the server.</a>
1.289 beck 277: <li><a href=errata34.html#kerberos> May 30, 2004:
278: kdc(8) performs inadequate checking of request fields, leading
279: to the possibility of principal impersonation from other
280: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.286 otto 281: <li><a href=errata34.html#cvs2> May 20, 2004:
282: A buffer overflow in the cvs(1) server has been found,
283: which can be used by CVS clients to execute arbitrary code on
284: the server.</a>
1.283 brad 285: <li><a href=errata34.html#procfs> May 13, 2004:
1.282 tedu 286: Integer overflow problems were found in procfs, allowing
287: reading of arbitrary kernel memory.</a>
1.281 otto 288: <li><a href=errata34.html#cvs> May 5, 2004:
289: Pathname validation problems have been found in cvs(1),
290: allowing clients and servers access to files outside the
291: repository or local CVS tree.</a>
1.279 deraadt 292: <li><a href=errata34.html#openssl> March 17, 2004:
1.277 millert 293: A missing check for a NULL-pointer dereference may allow a
1.281 otto 294: remote attacker to crash applications using OpenSSL.</a>
1.279 deraadt 295: <li><a href=errata34.html#isakmpd2> March 17, 2004:
1.276 brad 296: Defects in the payload validation and processing functions of
297: isakmpd have been discovered. An attacker could send malformed
298: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.279 deraadt 299: <li><a href=errata34.html#httpd2> March 13, 2004:
1.275 brad 300: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
301: access module, using IP addresses without a netmask on big endian
302: 64-bit platforms causes the rules to fail to match.</a>
1.279 deraadt 303: <li><a href=errata34.html#ip6> February 8, 2004:
1.272 dhartmei 304: An IPv6 MTU handling problem exists that could be used by an
305: attacker to cause a denial of service attack.</a>
1.279 deraadt 306: <li><a href=errata34.html#sysvshm> February 5, 2004:
1.271 millert 307: A reference counting bug in shmat(2) could be used to write to
308: kernel memory under certain circumstances.</a>
1.279 deraadt 309: <li><a href=errata34.html#isakmpd>January 13, 2004:
1.266 brad 310: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 311: by Thomas Walpuski.</a>
1.279 deraadt 312: <li><a href=errata34.html#ibcs2>November 17, 2003:
1.264 henning 313: It may be possible for a local user to overrun the stack in
314: compat_ibcs2(8) and cause a kernel panic.</a>
1.279 deraadt 315: <li><a href=errata34.html#asn1>November 1, 2003:
1.262 margarid 316: The use of certain ASN.1 encodings or malformed public keys may
317: allow an attacker to mount a denial of service attack against
318: applications linked with ssl(3).</a>
1.261 david 319: </ul>
320:
321: <p>
1.284 otto 322: OpenBSD 3.3 and earlier releases are not supported anymore. The following
323: paragraphs only list advisories issued while they were maintained; these
324: releases are likely to be affected by the advisories for more recent releases.
325: <br>
326:
1.261 david 327: <li>
1.288 matthieu 328: <a name="33"></a>
1.246 deraadt 329:
330: <h3><font color=#e00000>OpenBSD 3.3 Security Advisories</font></h3>
331: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.284 otto 332: in <a href=anoncvs.html>OpenBSD current</a>. The
333: <a href=stable.html>patch branch</a> for 3.3 is no longer being maintained,
334: you should update your machine.
1.246 deraadt 335: <p>
336: <ul>
1.281 otto 337: <li><a href=errata33.html#cvs> May 5, 2004:
338: Pathname validation problems have been found in cvs(1),
339: allowing clients and servers access to files outside the
340: repository or local CVS tree.</a>
1.277 millert 341: <li><a href=errata33.html#openssl> March 17, 2004:
342: A missing check for a NULL-pointer dereference may allow a
1.281 otto 343: remote attacker to crash applications using OpenSSL.</a>
1.276 brad 344: <li><a href=errata33.html#isakmpd2> March 17, 2004:
345: Defects in the payload validation and processing functions of
346: isakmpd have been discovered. An attacker could send malformed
347: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.275 brad 348: <li><a href=errata33.html#httpd2> March 13, 2004:
349: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
350: access module, using IP addresses without a netmask on big endian
351: 64-bit platforms causes the rules to fail to match.</a>
352: <li><a href=errata33.html#ip6> February 8, 2004:
353: An IPv6 MTU handling problem exists that could be used by an
354: attacker to cause a denial of service attack.</a>
1.271 millert 355: <li><a href=errata33.html#sysvshm> February 5, 2004:
356: A reference counting bug in shmat(2) could be used to write to
357: kernel memory under certain circumstances.</a>
1.270 jose 358: <li><a href=errata33.html#isakmpd>January 15, 2004:
1.268 brad 359: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 360: by Thomas Walpuski.</a>
1.264 henning 361: <li><a href=errata33.html#ibcs2>November 17, 2003:
362: It may be possible for a local user to execute arbitrary code
363: resulting in escalation of privileges due to a stack overrun
364: in compat_ibcs2(8).</a>
1.261 david 365: <li><a href=errata33.html#asn1>October 1, 2003:
1.257 millert 366: The use of certain ASN.1 encodings or malformed public keys may
367: allow an attacker to mount a denial of service attack against
368: applications linked with ssl(3).</a>
1.261 david 369: <li><a href=errata33.html#pfnorm>September 24, 2003:
1.258 beck 370: Access of freed memory in pf(4) could be used to
1.260 margarid 371: remotely panic a machine using scrub rules.</a>
1.261 david 372: <li><a href=errata33.html#sendmail>September 17, 2003:
1.256 millert 373: A buffer overflow in the address parsing in
374: sendmail(8) may allow an attacker to gain root privileges.</a>
1.261 david 375: <li><a href=errata33.html#sshbuffer>September 16, 2003:
1.255 millert 376: OpenSSH versions prior to 3.7 contains a buffer management error
377: that is potentially exploitable.</a>
1.261 david 378: <li><a href=errata33.html#sysvsem>September 10, 2003:
1.254 millert 379: Root may be able to reduce the security level by taking advantage of
380: an integer overflow when the semaphore limits are made very large.</a>
1.261 david 381: <li><a href=errata33.html#semget>August 20, 2003:
1.252 millert 382: An improper bounds check in the kernel may allow a local user
383: to panic the kernel.</a>
1.261 david 384: <li><a href=errata33.html#realpath>August 4, 2003:
1.249 millert 385: An off-by-one error exists in the C library function realpath(3)
386: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 387: </ul>
388:
1.265 miod 389:
1.247 david 390: <p>
1.246 deraadt 391: <li>
1.288 matthieu 392: <a name="32"></a>
1.224 deraadt 393:
394: <h3><font color=#e00000>OpenBSD 3.2 Security Advisories</font></h3>
395: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.265 miod 396: in <a href=anoncvs.html>OpenBSD current</a>. The
397: <a href=stable.html>patch branch</a> for 3.2 is no longer being maintained,
398: you should update your machine.
1.224 deraadt 399: <p>
400: <ul>
1.257 millert 401: <li><a href=errata32.html#asn1>October 1, 2003:
402: The use of certain ASN.1 encodings or malformed public keys may
403: allow an attacker to mount a denial of service attack against
404: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.259 margarid 405: <li><a href=errata32.html#pfnorm>September 24, 2003:
1.258 beck 406: Access of freed memory in pf(4) could be used to
1.260 margarid 407: remotely panic a machine using scrub rules.</a>
1.256 millert 408: <li><a href=errata32.html#sendmail4>September 17, 2003:
409: A buffer overflow in the address parsing in
410: sendmail(8) may allow an attacker to gain root privileges.</a>
1.255 millert 411: <li><a href=errata32.html#sshbuffer>September 16, 2003:
412: OpenSSH versions prior to 3.7 contains a buffer management error
413: that is potentially exploitable.</a>
1.253 brad 414: <li><a href=errata32.html#sendmail3>August 25, 2003:
415: Fix for a potential security issue in
416: sendmail(8) with respect to DNS maps.</a>
1.249 millert 417: <li><a href=errata32.html#realpath>August 4, 2003:
418: An off-by-one error exists in the C library function realpath(3)
419: may allow an attacker to gain escalated privileges.</a>
1.244 miod 420: <li><a href=errata32.html#sendmail2>March 31, 2003:
421: A buffer overflow in the address parsing in
422: sendmail(8) may allow an attacker to gain root privileges.</a>
1.243 deraadt 423: <li><a href=errata32.html#kerberos>March 24, 2003:
1.242 millert 424: A cryptographic weaknesses in the Kerberos v4 protocol can be
425: exploited on Kerberos v5 as well.</a>
1.243 deraadt 426: <li><a href=errata32.html#kpr>March 19, 2003:
1.241 jufi 427: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 428: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.243 deraadt 429: <li><a href=errata32.html#blinding>March 18, 2003:
1.239 miod 430: Various SSL and TLS operations in OpenSSL are vulnerable to
431: timing attacks.</a>
1.243 deraadt 432: <li><a href=errata32.html#lprm>March 5, 2003:
1.238 millert 433: A buffer overflow in lprm(1) may allow an attacker to elevate
434: privileges to user daemon.</a>.
1.243 deraadt 435: <li><a href=errata32.html#sendmail>March 3, 2003:
1.237 miod 436: A buffer overflow in the envelope comments processing in
437: sendmail(8) may allow an attacker to gain root privileges.</a>
1.243 deraadt 438: <li><a href=errata32.html#httpd>February 25, 2003:
1.236 margarid 439: httpd(8) leaks file inode numbers via ETag header as well as
440: child PIDs in multipart MIME boundary generation. This could
441: lead, for example, to NFS exploitation because it uses inode
442: numbers as part of the file handle.</a>
1.243 deraadt 443: <li><a href=errata32.html#ssl>February 22, 2003:
1.234 margarid 444: In ssl(8) an information leak can occur via timing by performing
445: a MAC computation even if incorrect block cipher padding has
446: been found, this is a countermeasure. Also, check for negative
447: sizes, in allocation routines.</a>
1.243 deraadt 448: <li><a href=errata32.html#cvs>January 20, 2003:
1.232 millert 449: A double free exists in cvs(1) that could lead to privilege
450: escalation for cvs configurations where the cvs command is
1.233 margarid 451: run as a privileged user.</a>
1.243 deraadt 452: <li><a href=errata32.html#named>November 14, 2002:
1.230 millert 453: A buffer overflow exists in named(8) that could lead to a
454: remote crash or code execution as user named in a chroot jail.</a>
1.243 deraadt 455: <li><a href=errata32.html#pool>November 6, 2002:
1.233 margarid 456: A logic error in the pool kernel memory allocator could cause
457: memory corruption in low-memory situations, causing the system
458: to crash.</a>
1.243 deraadt 459: <li><a href=errata32.html#smrsh>November 6, 2002:
1.229 miod 460: An attacker can bypass smrsh(8)'s restrictions and execute
461: arbitrary commands with the privileges of his own account.</a>
1.243 deraadt 462: <li><a href=errata32.html#pfbridge>November 6, 2002:
1.233 margarid 463: Network bridges running pf with scrubbing enabled could cause
464: mbuf corruption, causing the system to crash.</a>
1.243 deraadt 465: <li><a href=errata32.html#kadmin>October 21, 2002:
1.228 miod 466: A buffer overflow can occur in the kadmind(8) daemon, leading
467: to possible remote crash or exploit.</a>
1.224 deraadt 468: </ul>
469:
1.227 miod 470: <p>
471: <li>
1.288 matthieu 472: <a name="31"></a>
1.203 deraadt 473:
474: <h3><font color=#e00000>OpenBSD 3.1 Security Advisories</font></h3>
475: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.258 beck 476: in <a href=anoncvs.html>OpenBSD current</a>. The
477: <a href=stable.html>patch branch</a> for 3.1 is no longer being maintained,
478: you should update your machine.
1.203 deraadt 479:
480: <p>
481: <ul>
1.244 miod 482: <li><a href=errata31.html#sendmail2>March 31, 2003:
483: A buffer overflow in the address parsing in
484: sendmail(8) may allow an attacker to gain root privileges.</a>
1.242 millert 485: <li><a href=errata31.html#kerberos>March 24, 2003:
486: A cryptographic weaknesses in the Kerberos v4 protocol can be
487: exploited on Kerberos v5 as well.</a>
1.240 miod 488: <li><a href=errata31.html#kpr>March 19, 2003:
1.241 jufi 489: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 490: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.239 miod 491: <li><a href=errata31.html#blinding>March 18, 2003:
492: Various SSL and TLS operations in OpenSSL are vulnerable to
493: timing attacks.</a>
1.238 millert 494: <li><a href=errata31.html#lprm>March 4, 2003:
495: A buffer overflow in lprm(1) may allow an attacker to gain
496: root privileges.</a>
1.237 miod 497: <li><a href=errata31.html#sendmail>March 3, 2003:
498: A buffer overflow in the envelope comments processing in
499: sendmail(8) may allow an attacker to gain root privileges.</a>
1.235 miod 500: <li><a href=errata31.html#ssl2>February 23, 2003:
501: In ssl(8) an information leak can occur via timing by performing
502: a MAC computation even if incorrect block cipher padding has
503: been found, this is a countermeasure. Also, check for negative
504: sizes, in allocation routines.</a>
1.232 millert 505: <li><a href=errata31.html#cvs>January 20, 2003:
506: A double free exists in cvs(1) that could lead to privilege
507: escalation for cvs configurations where the cvs command is
508: run as a privileged user.
1.230 millert 509: <li><a href=errata31.html#named>November 14, 2002:
510: A buffer overflow exists in named(8) that could lead to a
511: remote crash or code execution as user named in a chroot jail.</a>
1.229 miod 512: <li><a href=errata31.html#kernresource>November 6, 2002:
513: Incorrect argument checking in the getitimer(2) system call
514: may allow an attacker to crash the system.</a>
515: <li><a href=errata31.html#smrsh>November 6, 2002:
516: An attacker can bypass smrsh(8)'s restrictions and execute
517: arbitrary commands with the privileges of his own account.</a>
1.226 miod 518: <li><a href=errata31.html#kadmin>October 21, 2002:
519: A buffer overflow can occur in the kadmind(8) daemon, leading
520: to possible remote crash or exploit.</a>
1.224 deraadt 521: <li><a href=errata31.html#kerntime>October 2, 2002:
1.222 jason 522: Incorrect argument checking in the setitimer(2) system call
523: may allow an attacker to write to kernel memory.</a>
1.224 deraadt 524: <li><a href=errata31.html#scarg>August 11, 2002:
1.221 provos 525: An insufficient boundary check in the select system call
1.220 miod 526: allows an attacker to overwrite kernel memory and execute arbitrary code
527: in kernel context.</a>
1.224 deraadt 528: <li><a href=errata31.html#ssl>July 30, 2002:
1.218 miod 529: Several remote buffer overflows can occur in the SSL2 server and SSL3
530: client of the ssl(8) library, as in the ASN.1 parser code in the
531: crypto(3) library, all of them being potentially remotely
532: exploitable.</a>
1.224 deraadt 533: <li><a href=errata31.html#xdr>July 29, 2002:
1.218 miod 534: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
535: possible remote crash.</a>
1.224 deraadt 536: <li><a href=errata31.html#pppd>July 29, 2002:
1.218 miod 537: A race condition exists in the pppd(8) daemon which may cause it to
538: alter the file permissions of an arbitrary file.</a>
1.224 deraadt 539: <li><a href=errata31.html#isakmpd>July 5, 2002:
1.218 miod 540: Receiving IKE payloads out of sequence can cause isakmpd(8) to
541: crash.</a>
1.224 deraadt 542: <li><a href=errata31.html#ktrace>June 27, 2002:
1.215 miod 543: The kernel would let any user ktrace set[ug]id processes.</a>
1.224 deraadt 544: <li><a href=errata31.html#modssl>June 26, 2002:
1.213 miod 545: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 546: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.224 deraadt 547: <li><a href=errata31.html#resolver>June 25, 2002:
1.212 millert 548: A potential buffer overflow in the DNS resolver has been found.</a>
1.224 deraadt 549: <li><a href=errata31.html#sshd>June 24, 2002:
1.216 deraadt 550: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 551: input validation error that can result in an integer overflow and
552: privilege escalation.</a>
1.224 deraadt 553: <li><a href=errata31.html#httpd>June 19, 2002:
1.211 miod 554: A buffer overflow can occur during the interpretation of chunked
555: encoding in httpd(8), leading to possible remote crash.</a>
1.224 deraadt 556: <li><a href=errata31.html#sshbsdauth>May 22, 2002:
1.209 markus 557: Under certain conditions, on systems using YP with netgroups
558: in the password database, it is possible that sshd(8) does
559: ACL checks for the requested user name but uses the password
560: database entry of a different user for authentication. This
561: means that denied users might authenticate successfully
562: while permitted users could be locked out.</a>
1.224 deraadt 563: <li><a href=errata31.html#fdalloc2>May 8, 2002:
1.208 millert 564: A race condition exists that could defeat the kernel's
565: protection of fd slots 0-2 for setuid processes.</a>
1.224 deraadt 566: <li><a href=errata31.html#sudo>April 25, 2002:
1.205 millert 567: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.224 deraadt 568: <li><a href=errata31.html#sshafs>April 22, 2002:
1.205 millert 569: A local user can gain super-user privileges due to a buffer
570: overflow in sshd(8) if AFS has been configured on the system
571: or if KerberosTgtPassing or AFSTokenPassing has been enabled
572: in the sshd_config file.</a>
1.203 deraadt 573: </ul>
574:
1.235 miod 575: <p>
1.203 deraadt 576: <li>
1.288 matthieu 577: <a name="30"></a>
1.187 deraadt 578:
579: <h3><font color=#e00000>OpenBSD 3.0 Security Advisories</font></h3>
580: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.258 beck 581: in <a href=anoncvs.html>OpenBSD current</a>. The
582: <a href=stable.html>patch branch</a> for 3.0 is no longer being maintained,
583: you should update your machine.
1.187 deraadt 584:
585: <p>
586: <ul>
1.230 millert 587: <li><a href=errata30.html#named>November 14, 2002:
588: A buffer overflow exists in named(8) that could lead to a
589: remote crash or code execution as user named in a chroot jail.</a>
1.229 miod 590: <li><a href=errata30.html#kernresource>November 6, 2002:
591: Incorrect argument checking in the getitimer(2) system call
592: may allow an attacker to crash the system.</a>
593: <li><a href=errata30.html#smrsh>November 6, 2002:
594: An attacker can bypass smrsh(8)'s restrictions and execute
595: arbitrary commands with the privileges of his own account.</a>
1.226 miod 596: <li><a href=errata30.html#kadmin>October 21, 2002:
597: A buffer overflow can occur in the kadmind(8) daemon, leading
598: to possible remote crash or exploit.</a>
1.223 miod 599: <li><a href=errata30.html#kerntime>October 7, 2002:
600: Incorrect argument checking in the setitimer(2) system call
601: may allow an attacker to write to kernel memory.</a>
1.220 miod 602: <li><a href=errata30.html#scarg>August 11, 2002:
603: An insufficient boundary check in the select and poll system calls
604: allows an attacker to overwrite kernel memory and execute arbitrary code
605: in kernel context.</a>
1.218 miod 606: <li><a href=errata30.html#ssl>July 30, 2002:
607: Several remote buffer overflows can occur in the SSL2 server and SSL3
608: client of the ssl(8) library, as in the ASN.1 parser code in the
609: crypto(3) library, all of them being potentially remotely
610: exploitable.</a>
611: <li><a href=errata30.html#xdr>July 29, 2002:
612: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
613: possible remote crash.</a>
614: <li><a href=errata30.html#pppd>July 29, 2002:
615: A race condition exists in the pppd(8) daemon which may cause it to
616: alter the file permissions of an arbitrary file.</a>
1.219 miod 617: <li><a href=errata30.html#isakmpd2>July 5, 2002:
1.218 miod 618: Receiving IKE payloads out of sequence can cause isakmpd(8) to
619: crash.</a>
1.215 miod 620: <li><a href=errata30.html#ktrace>June 27, 2002:
621: The kernel would let any user ktrace set[ug]id processes.</a>
1.212 millert 622: <li><a href=errata30.html#resolver>June 25, 2002:
623: A potential buffer overflow in the DNS resolver has been found.</a>
1.213 miod 624: <li><a href=errata30.html#sshdauth>June 24, 2002:
1.216 deraadt 625: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 626: input validation error that can result in an integer overflow and
627: privilege escalation.</a>
628: <li><a href=errata30.html#modssl>June 24, 2002:
629: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 630: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.213 miod 631: <li><a href=errata30.html#httpd>June 19, 2002:
632: A buffer overflow can occur during the interpretation of chunked
633: encoding in httpd(8), leading to possible remote crash.</a>
1.208 millert 634: <li><a href=errata30.html#fdalloc2>May 8, 2002:
635: A race condition exists that could defeat the kernel's
636: protection of fd slots 0-2 for setuid processes.</a>
1.205 millert 637: <li><a href=errata30.html#sudo2>April 25, 2002:
638: A bug in sudo may allow an attacker to corrupt the heap.</a>
639: <li><a href=errata30.html#sshafs>April 22, 2002:
640: A local user can gain super-user privileges due to a buffer
641: overflow in sshd(8) if AFS has been configured on the system
642: or if KerberosTgtPassing or AFSTokenPassing has been enabled
643: in the sshd_config file.</a>
1.203 deraadt 644: <li><a href=errata30.html#mail>April 11, 2002:
1.202 millert 645: The mail(1) was interpreting tilde escapes even when invoked
646: in non-interactive mode. As mail(1) is called as root from cron,
647: this can lead to a local root compromise.</a>
1.203 deraadt 648: <li><a href=errata30.html#approval>March 19, 2002:
1.201 millert 649: Under certain conditions, on systems using YP with netgroups in
650: the password database, it is possible for the rexecd(8) and rshd(8)
651: daemons to execute a shell from a password database entry for a
652: different user. Similarly, atrun(8) may change to the wrong
653: home directory when running jobs.</a>
1.203 deraadt 654: <li><a href=errata30.html#zlib>March 13, 2002:
1.200 millert 655: A potential double free() exists in the zlib library;
656: this is not exploitable on OpenBSD.
657: The kernel also contains a copy of zlib; it is not
658: currently known if the kernel zlib is exploitable.</a>
1.203 deraadt 659: <li><a href=errata30.html#openssh>March 8, 2002:
1.198 millert 660: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 661: may allow a local user to gain super-user privileges.</a>
1.203 deraadt 662: <li><a href=errata30.html#ptrace>January 21, 2002:
1.192 jason 663: A race condition between the ptrace(2) and execve(2) system calls
664: allows an attacker to modify the memory contents of suid/sgid
665: processes which could lead to compromise of the super-user account.</a>
1.203 deraadt 666: <li><a href=errata30.html#sudo>January 17, 2002:
1.191 millert 667: There is a security hole in sudo(8) that can be exploited
668: when the Postfix sendmail replacement is installed that may
669: allow an attacker on the local host to gain root privileges.</a>
1.203 deraadt 670: <li><a href=errata30.html#lpd>November 28, 2001:
1.189 millert 671: An attacker can trick a machine running the lpd daemon into
672: creating new files in the root directory from a machine with
673: remote line printer access.</a>
1.203 deraadt 674: <li><a href=errata30.html#vi.recover>November 13, 2001:
1.188 millert 675: The vi.recover script can be abused in such a way as
676: to cause arbitrary zero-length files to be removed.</a>
1.203 deraadt 677: <li><a href=errata30.html#pf>November 13, 2001:
1.190 mpech 678: pf(4) was incapable of dealing with certain ipv6 icmp packets,
679: resulting in a crash.</a>
1.203 deraadt 680: <li><a href=errata30.html#sshd>November 12, 2001:
1.190 mpech 681: A security hole that may allow an attacker to partially authenticate
682: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 683: </ul>
684:
685: <p>
686: <li>
1.288 matthieu 687: <a name="29"></a>
1.173 deraadt 688:
689: <h3><font color=#e00000>OpenBSD 2.9 Security Advisories</font></h3>
690: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.258 beck 691: in <a href=anoncvs.html>OpenBSD current</a>. The
692: <a href=stable.html>patch branch</a>. for 2.9 is no longer being maintained,
693: you should update your machine.
694:
1.173 deraadt 695:
696: <p>
697: <ul>
1.212 millert 698: <li><a href=errata29.html#resolver>June 25, 2002:
699: A potential buffer overflow in the DNS resolver has been found.</a>
1.208 millert 700: <li><a href=errata29.html#fdalloc2>May 8, 2002:
701: A race condition exists that could defeat the kernel's
702: protection of fd slots 0-2 for setuid processes.</a>
1.207 millert 703: <li><a href=errata29.html#sudo2>April 25, 2002:
704: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.206 millert 705: <li><a href=errata29.html#sshafs>April 22, 2002:
706: A local user can gain super-user privileges due to a buffer
707: overflow in sshd(8) if AFS has been configured on the system
708: or if KerberosTgtPassing or AFSTokenPassing has been enabled
709: in the sshd_config file.</a>
1.202 millert 710: <li><a href=errata29.html#mail>April 11, 2002:
711: The mail(1) was interpreting tilde escapes even when invoked
712: in non-interactive mode. As mail(1) is called as root from cron,
713: this can lead to a local root compromise.</a>
1.200 millert 714: <li><a href=errata29.html#zlib>March 13, 2002:
715: A potential double free() exists in the zlib library;
716: this is not exploitable on OpenBSD.
717: The kernel also contains a copy of zlib; it is not
718: currently known if the kernel zlib is exploitable.</a>
1.198 millert 719: <li><a href=errata29.html#openssh>March 8, 2002:
720: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 721: may allow a local user to gain super-user privileges.</a>
1.198 millert 722: <li><a href=errata29.html#ptrace>January 21, 2002:
723: A race condition between the ptrace(2) and execve(2) system calls
724: allows an attacker to modify the memory contents of suid/sgid
725: processes which could lead to compromise of the super-user account.</a>
1.191 millert 726: <li><a href=errata29.html#sudo>January 17, 2002:
727: There is a security hole in sudo(8) that can be exploited
728: when the Postfix sendmail replacement is installed that may
729: allow an attacker on the local host to gain root privileges.</a>
1.189 millert 730: <li><a href=errata29.html#lpd2>November 28, 2001:
731: An attacker can trick a machine running the lpd daemon into
732: creating new files in the root directory from a machine with
733: remote line printer access.</a>
1.190 mpech 734: <li><a href=errata29.html#vi.recover>November 13, 2001:
735: The vi.recover script can be abused in such a way as
736: to cause arbitrary zero-length files to be removed.</a>
1.185 deraadt 737: <li><a href=errata29.html#uucp>September 11, 2001:
1.184 millert 738: A security hole exists in uuxqt(8) that may allow an
739: attacker to gain root privileges.</a>
1.185 deraadt 740: <li><a href=errata29.html#lpd>August 29, 2001:
1.183 millert 741: A security hole exists in lpd(8) that may allow an
742: attacker to gain root privileges if lpd is running.</a>
1.185 deraadt 743: <li><a href=errata29.html#sendmail2>August 21, 2001:
1.181 millert 744: A security hole exists in sendmail(8) that may allow an
745: attacker on the local host to gain root privileges.</a>
1.185 deraadt 746: <li><a href=errata29.html#nfs>July 30, 2001:
1.180 jason 747: A kernel buffer overflow in the NFS code can be used to execute
748: arbitrary code by users with mount privileges (only root by
1.181 millert 749: default).</a>
1.185 deraadt 750: <li><a href=errata29.html#kernexec>June 15, 2001:
1.178 aaron 751: A race condition in the kernel can lead to local root compromise.</a>
1.185 deraadt 752: <li><a href=errata29.html#sshcookie>June 12, 2001:
1.177 markus 753: sshd(8) allows users to delete arbitrary files named "cookies"
754: if X11 forwarding is enabled. X11 forwarding is disabled
755: by default.</a>
1.185 deraadt 756: <li><a href=errata29.html#fts>May 30, 2001:
1.176 millert 757: Programs using the fts routines can be tricked into changing
758: into the wrong directory.</a>
1.185 deraadt 759: <li><a href=errata29.html#sendmail>May 29, 2001:
1.174 millert 760: Sendmail signal handlers contain unsafe code,
761: leading to numerous race conditions.</a>
1.173 deraadt 762: </ul>
763:
764: <p>
765: <li>
1.288 matthieu 766: <a name="28"></a>
1.152 deraadt 767:
768: <h3><font color=#e00000>OpenBSD 2.8 Security Advisories</font></h3>
769: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.258 beck 770: in <a href=anoncvs.html>OpenBSD current</a>. The
771: <a href=stable.html>patch branch</a>. for 2.8 is no longer being maintained,
772: you should update your machine.
773:
1.152 deraadt 774:
775: <p>
776: <ul>
1.184 millert 777: <li><a href=errata28.html#uucp>September 11, 2001:
778: A security hole exists in uuxqt(8) that may allow an
779: attacker to gain root privileges.</a>
1.183 millert 780: <li><a href=errata28.html#lpd>August 29, 2001:
781: A security hole exists in lpd(8) that may allow an
782: attacker to gain root privileges if lpd is running.</a>
1.181 millert 783: <li><a href=errata28.html#sendmail2>August 21, 2001:
784: A security hole exists in sendmail(8) that may allow an
785: attacker on the local host to gain root privileges.</a>
1.178 aaron 786: <li><a href=errata28.html#kernexec>June 15, 2001:
787: A race condition in the kernel can lead to local root compromise.</a>
1.176 millert 788: <li><a href=errata28.html#fts>May 30, 2001:
789: Programs using the fts routines can be tricked into changing
790: into the wrong directory.</a>
1.175 millert 791: <li><a href=errata28.html#sendmail>May 29, 2001:
792: Sendmail signal handlers contain unsafe code,
793: leading to numerous race conditions.</a>
1.173 deraadt 794: <li><a href=errata28.html#ipf_frag>Apr 23, 2001:
1.231 mickey 795: IPF contains a serious bug with its handling of fragment caching.</a>
1.173 deraadt 796: <li><a href=errata28.html#glob_limit>Apr 23, 2001:
1.172 ericj 797: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.173 deraadt 798: <li><a href=errata28.html#glob>Apr 10, 2001:
1.170 ericj 799: The glob(3) library call contains multiple buffer overflows.</a>
1.173 deraadt 800: <li><a href=errata28.html#readline>Mar 18, 2001:
1.169 millert 801: The readline library creates history files with permissive modes based on the user's umask.</a>
1.173 deraadt 802: <li><a href=errata28.html#ipsec_ah>Mar 2, 2001:
1.167 ericj 803: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.173 deraadt 804: <li><a href=errata28.html#userldt>Mar 2, 2001:
1.168 horacio 805: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.173 deraadt 806: <li><a href=errata28.html#sudo>Feb 22, 2001:
1.171 millert 807: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.173 deraadt 808: <li><a href=errata28.html#named>Jan 29, 2001:
1.163 jason 809: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.173 deraadt 810: <li><a href=errata28.html#rnd>Jan 22, 2001:
1.162 jason 811: rnd(4) did not use all of its input when written to.</a>
1.173 deraadt 812: <li><a href=errata28.html#xlock>Dec 22, 2000:
1.159 ericj 813: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.173 deraadt 814: <li><a href=errata28.html#procfs>Dec 18, 2000:
1.157 ericj 815: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.173 deraadt 816: <li><a href=errata28.html#kerberos2>Dec 10, 2000:
1.156 deraadt 817: Another problem exists in KerberosIV libraries (patch included).</a>
1.173 deraadt 818: <li><a href=errata28.html#kerberos>Dec 7, 2000:
1.155 deraadt 819: A set of problems in KerberosIV exist (patch included).</a>
1.173 deraadt 820: <li><a href=errata28.html#ftpd>Dec 4, 2000:
1.154 millert 821: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 822: </ul>
823:
824: <p>
825: <li>
1.288 matthieu 826: <a name="27"></a>
1.124 deraadt 827:
828: <h3><font color=#e00000>OpenBSD 2.7 Security Advisories</font></h3>
829: These are the OpenBSD 2.7 advisories -- all these problems are solved
830: in <a href=anoncvs.html>OpenBSD current</a>. Obviously, all the
831: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
832:
833: <p>
834: <ul>
1.169 millert 835: <li><a href=errata27.html#readline>Mar 18, 2001:
836: The readline library creates history files with permissive modes based on the user's umask.</a>
837: <li><a href=errata27.html#sudo>Feb 22, 2001:
838: a buffer overflow was fixed in sudo(8).</a>
1.154 millert 839: <li><a href=errata27.html#ftpd>Dec 4, 2000:
840: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 841: <li><a href=errata27.html#sshforwarding>Nov 10, 2000:
842: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
843: (patch included)</a>
844: <li><a href=errata27.html#xtrans>Oct 26, 2000:
1.151 matthieu 845: X11 libraries have 2 potential overflows in xtrans code.
846: (patch included)</a>
1.152 deraadt 847: <li><a href=errata27.html#httpd>Oct 18, 2000:
1.150 beck 848: Apache mod_rewrite and mod_vhost_alias modules could expose files
849: on the server in certain configurations if used.
850: (patch included)</a>
1.164 deraadt 851: <li><a href=errata27.html#telnetd>Oct 10, 2000:
1.149 millert 852: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
853: TERMPATH and TERMCAP environment variables as it should.
854: (patch included)</a>
1.152 deraadt 855: <li><a href=errata27.html#format_strings>Oct 6, 2000:
1.148 millert 856: There are printf-style format string bugs in several privileged
857: programs. (patch included)</a>
1.152 deraadt 858: <li><a href=errata27.html#curses>Oct 6, 2000:
1.147 millert 859: libcurses honored terminal descriptions in the $HOME/.terminfo
860: directory as well as in the TERMCAP environment variable for
861: setuid and setgid applications.
1.146 deraadt 862: (patch included)</a>
1.152 deraadt 863: <li><a href=errata27.html#talkd>Oct 6, 2000:
1.146 deraadt 864: A format string vulnerability exists in talkd(8).
865: (patch included)</a>
1.152 deraadt 866: <li><a href=errata27.html#pw_error>Oct 3, 2000:
1.145 aaron 867: A format string vulnerability exists in the pw_error() function of the
868: libutil library, yielding localhost root through chpass(1).
869: (patch included)</a>
1.152 deraadt 870: <li><a href=errata27.html#ipsec>Sep 18, 2000:
1.144 jason 871: Bad ESP/AH packets could cause a crash under certain conditions.
872: (patch included)</a>
1.152 deraadt 873: <li><a href=errata27.html#xlock>Aug 16, 2000:
1.141 deraadt 874: A format string vulnerability (localhost root) exists in xlock(1).
875: (patch included)</a>
1.152 deraadt 876: <li><a href=errata27.html#X11_libs>July 14, 2000:
1.139 deraadt 877: Various bugs found in X11 libraries have various side effects, almost
878: completely denial of service in OpenBSD.
879: (patch included)</a>
1.152 deraadt 880: <li><a href=errata27.html#ftpd>July 5, 2000:
1.136 deraadt 881: Just like pretty much all the other unix ftp daemons
882: on the planet, ftpd had a remote root hole in it.
883: Luckily, ftpd was not enabled by default.
1.137 deraadt 884: The problem exists if anonymous ftp is enabled.
1.136 deraadt 885: (patch included)</a>
1.152 deraadt 886: <li><a href=errata27.html#mopd>July 5, 2000:
1.136 deraadt 887: Mopd, very rarely used, contained some buffer overflows.
888: (patch included)</a>
1.152 deraadt 889: <li><a href=errata27.html#libedit>June 28, 2000:
1.135 deraadt 890: libedit would check for a <b>.editrc</b> file in the current
891: directory. Not known to be a real security issue, but a patch
892: is available anyways.
893: (patch included)</a>
1.152 deraadt 894: <li><a href=errata27.html#dhclient>June 24, 2000:
1.134 deraadt 895: A serious bug in dhclient(8) could allow strings from a
896: malicious dhcp server to be executed in the shell as root.
897: (patch included)</a>
1.152 deraadt 898: <li><a href=errata27.html#isakmpd>June 9, 2000:
1.133 deraadt 899: A serious bug in isakmpd(8) policy handling wherein
900: policy verification could be completely bypassed in isakmpd.
901: (patch included)</a>
1.152 deraadt 902: <li><a href=errata27.html#uselogin>June 6, 2000:
1.132 deraadt 903: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
904: should not be used, and results in security problems on
905: other operating systems.</a>
1.152 deraadt 906: <li><a href=errata27.html#bridge>May 26, 2000:
1.129 deraadt 907: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 908: (patch included)</a>
1.152 deraadt 909: <li><a href=errata27.html#ipf>May 25, 2000:
1.127 kjell 910: Improper use of ipf <i>keep-state</i> rules can result
911: in firewall rules being bypassed. (patch included)</a>
912:
1.124 deraadt 913: </ul>
914:
915: <p>
916: <li>
1.288 matthieu 917: <a name="26"></a>
1.119 deraadt 918:
919: <h3><font color=#e00000>OpenBSD 2.6 Security Advisories</font></h3>
920: These are the OpenBSD 2.6 advisories -- all these problems are solved
921: in <a href=anoncvs.html>OpenBSD current</a>. Obviously, all the
922: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
923:
924: <p>
925: <ul>
1.130 deraadt 926: <li><a href=errata26.html#semconfig>May 26, 2000:
927: SYSV semaphore support contained an undocumented system call
1.131 deraadt 928: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.127 kjell 929: <li><a href=errata26.html#ipf>May 25, 2000:
930: Improper use of ipf <i>keep-state</i> rules can result
931: in firewall rules being bypassed. (patch included)</a>
1.126 deraadt 932: <li><a href=errata26.html#xlockmore>May 25, 2000:
1.125 deraadt 933: xlockmore has a bug which a localhost attacker can use to gain
934: access to the encrypted root password hash (which is normally
1.245 miod 935: encoded using blowfish</a> (see
1.125 deraadt 936: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
937: crypt(3)</a>)
1.245 miod 938: (patch included).
1.126 deraadt 939: <li><a href=errata26.html#procfs>Jan 20, 2000:
1.123 deraadt 940: Systems running with procfs enabled and mounted are
941: vulnerable to a very tricky exploit. procfs is not
942: mounted by default.
943: (patch included).</a>
1.190 mpech 944: <li><a href=errata26.html#sendmail>Dec 4, 1999:
945: Sendmail permitted any user to cause a aliases file wrap,
946: thus exposing the system to a race where the aliases file
947: did not exist.
1.119 deraadt 948: (patch included).</a>
1.190 mpech 949: <li><a href=errata26.html#poll>Dec 4, 1999:
950: Various bugs in poll(2) may cause a kernel crash.</a>
1.126 deraadt 951: <li><a href=errata26.html#sslUSA>Dec 2, 1999:
1.120 deraadt 952: A buffer overflow in the RSAREF code included in the
953: USA version of libssl, is possibly exploitable in
954: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 955: (patch included).<br></a>
956: <strong>Update:</strong> Turns out that this was not exploitable
957: in any of the software included in OpenBSD 2.6.
1.190 mpech 958: <li><a href=errata26.html#ifmedia>Nov 9, 1999:
959: Any user could change interface media configurations, resulting in
960: a localhost denial of service attack.
1.121 deraadt 961: (patch included).</a>
1.119 deraadt 962: </ul>
963:
964: <p>
965: <li>
1.288 matthieu 966: <a name="25"></a>
1.106 deraadt 967:
1.110 deraadt 968: <h3><font color=#e00000>OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 969: These are the OpenBSD 2.5 advisories -- all these problems are solved
970: in <a href=anoncvs.html>OpenBSD current</a>. Obviously, all the
971: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
972:
1.96 deraadt 973: <p>
1.104 deraadt 974: <ul>
1.117 deraadt 975: <li><a href=errata25.html#cron>Aug 30, 1999:
1.103 deraadt 976: In cron(8), make sure argv[] is NULL terminated in the
977: fake popen() and run sendmail as the user, not as root.
978: (patch included).</a>
1.117 deraadt 979: <li><a href=errata25.html#miscfs>Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 980: filesystems had an overrun in their handling of uio_offset
981: in their readdir() routines. (These filesystems are not
982: enabled by default). (patch included).</a>
1.117 deraadt 983: <li><a href=errata25.html#profil>Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 984: when we execve() a new process. (patch included).</a>
1.117 deraadt 985: <li><a href=errata25.html#ipsec_in_use>Aug 6, 1999: Packets that should have
1.98 deraadt 986: been handled by IPsec may be transmitted as cleartext.
987: PF_KEY SA expirations may leak kernel resources.
988: (patch included).</a>
1.117 deraadt 989: <li><a href=errata25.html#rc>Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 990: motd re-writing and change the find(1) to use -execdir
991: (patch included).</a>
1.117 deraadt 992: <li><a href=errata25.html#chflags>Jul 30, 1999: Do not permit regular
1.95 deraadt 993: users to chflags(2) or fchflags(2) on character or block devices
994: which they may currently be the owner of (patch included).</a>
1.117 deraadt 995: <li><a href=errata25.html#nroff>Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 996: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 997: </ul>
998:
1.106 deraadt 999: <p>
1000: <li>
1.288 matthieu 1001: <a name="24"></a>
1.235 miod 1002:
1.110 deraadt 1003: <h3><font color=#e00000>OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1004: These are the OpenBSD 2.4 advisories -- all these problems are solved
1005: in <a href=anoncvs.html>OpenBSD current</a>. Obviously, all the
1006: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1007:
1.96 deraadt 1008: <p>
1.75 deraadt 1009: <ul>
1.92 deraadt 1010: <li><a href=errata24.html#poll>Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1011: to be constrained, to avoid kvm starvation (patch included).</a>
1.92 deraadt 1012: <li><a href=errata24.html#tss>Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1013: another kernel crash case caused by the <strong>crashme</strong>
1014: program (patch included).</a>
1.92 deraadt 1015: <li><a href=errata24.html#nlink>Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1016: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1017: (patch included).</a>
1.92 deraadt 1018: <li><a href=errata24.html#ping>Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1019: existed in ping(8). (patch included).</a>
1.92 deraadt 1020: <li><a href=errata24.html#ipqrace>Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1021: the ipq, which could permit an attacker to cause a crash.
1022: (patch included).</a>
1.92 deraadt 1023: <li><a href=errata24.html#accept>Feb 17, 1999: A race condition in the
1.86 deraadt 1024: kernel between accept(2) and select(2) could permit an attacker
1025: to hang sockets from remote.
1026: (patch included).</a>
1.92 deraadt 1027: <li><a href=errata24.html#maxqueue>Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1028: bog the machine excessively and cause problems.
1029: (patch included).</a>
1.92 deraadt 1030: <li><a href=errata24.html#trctrap>Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1031: DDB interacted to possibly cause a crash.
1032: (patch included).</a>
1.92 deraadt 1033: <li><a href=errata24.html#rst>Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1034: (patch included).</a>
1.92 deraadt 1035: <li><a href=errata24.html#bootpd>Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1036: problem in bootpd(8). (patch included).</a>
1.92 deraadt 1037: <li><a href=errata24.html#termcap>Nov 19, 1998: There is a possibly locally
1.82 deraadt 1038: exploitable problem relating to environment variables in termcap
1039: and curses. (patch included).</a>
1.92 deraadt 1040: <li><a href=errata24.html#tcpfix>Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1041: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1042: </ul>
1043:
1.106 deraadt 1044: <p>
1045: <li>
1.288 matthieu 1046: <a name="23"></a>
1.235 miod 1047:
1.110 deraadt 1048: <h3><font color=#e00000>OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1049: These are the OpenBSD 2.3 advisories -- all these problems are solved
1050: in <a href=anoncvs.html>OpenBSD current</a>. Obviously, all the
1051: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1052:
1.96 deraadt 1053: <p>
1.53 matthieu 1054: <ul>
1.81 deraadt 1055: <li><a href=errata23.html#bootpd>Nov 27, 1998: There is a remotely exploitable
1056: problem in bootpd(8). (patch included).</a>
1.78 deraadt 1057: <li><a href=errata23.html#tcpfix>Nov 13, 1998: There is a remote machine lockup
1058: bug in the TCP decoding kernel. (patch included).</a>
1.190 mpech 1059: <li><a href=errata23.html#resolver>August 31, 1998: A benign looking resolver
1060: buffer overflow bug was re-introduced accidentally (patches included).</a>
1061: <li><a href=errata23.html#chpass>Aug 2, 1998:
1062: chpass(1) has a file descriptor leak which allows an
1063: attacker to modify /etc/master.passwd.</a>
1064: <li><a href=errata23.html#inetd>July 15, 1998: Inetd had a file descriptor leak.</a>
1.76 aaron 1065: <li><a href=errata23.html#fdalloc>Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1066: should not be executed with fd slots 0, 1, or 2 free.
1067: (patch included).</a>
1.76 aaron 1068: <li><a href=errata23.html#xlib>June 6, 1998: Further problems with the X
1.71 deraadt 1069: libraries (patches included).</a>
1.76 aaron 1070: <li><a href=errata23.html#kill>May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1071: processes too permissive (4th revision patch included).</a>
1.76 aaron 1072: <li><a href=errata23.html#immutable>May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1073: of immutable and append-only file flags. (patch included).</a>
1.190 mpech 1074: <li><a href=errata23.html#ipsec>May 5, 1998: Incorrect handling of IPSEC packets
1075: if IPSEC is enabled (patch included).</a>
1.76 aaron 1076: <li><a href=errata23.html#xterm-xaw>May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1077: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1078: </ul>
1.9 deraadt 1079:
1.106 deraadt 1080: <p>
1081: <li>
1.288 matthieu 1082: <a name="22"></a>
1.235 miod 1083:
1.110 deraadt 1084: <h3><font color=#e00000>OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1085: These are the OpenBSD 2.2 advisories. All these problems are solved
1.55 deraadt 1086: in <a href=23.html>OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1087: still exist in other operating systems. (The supplied patches are for
1088: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1089:
1.96 deraadt 1090: <p>
1.9 deraadt 1091: <ul>
1.72 deraadt 1092: <li><a href=errata22.html#ipsec>May 5, 1998: Incorrect handling of IPSEC
1093: packets if IPSEC is enabled (patch included).</a>
1094: <li><a href=errata22.html#xterm-xaw>May 1, 1998: Buffer overflow in xterm
1095: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1096: <li><a href=errata22.html#uucpd>Apr 22, 1998: Buffer overflow in uucpd
1097: (patch included).</a>
1098: <li><a href=errata22.html#rmjob>Apr 22, 1998: Buffer mismanagement in lprm
1099: (patch included).</a>
1100: <li><a href=errata22.html#ping>Mar 31, 1998: Overflow in ping -R (patch included).</a>
1101: <li><a href=errata22.html#named>Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1102: (patch included).</a>
1.72 deraadt 1103: <li><a href=errata22.html#mountd>Mar 2, 1998: Accidental NFS filesystem
1104: export (patch included).</a>
1.112 philen 1105: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.72 deraadt 1106: Revision 3 of the patch is available <a href=errata22.html#mmap>here</a>
1.112 philen 1107: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1108: Acceptance.</a>
1.50 deraadt 1109: A patch is available <a href=errata22.html#sourceroute>here</a>.
1.122 rohee 1110: <li><a href=errata22.html#ruserok>Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1111: flaw (patch included).</a>
1112: <li><a href=errata22.html#ldso>Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1113: </ul>
1114:
1.106 deraadt 1115: <p>
1116: <li>
1.288 matthieu 1117: <a name="21"></a>
1.235 miod 1118:
1.110 deraadt 1119: <h3><font color=#e00000>OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1120: These are the OpenBSD 2.1 advisories. All these problems are solved
1121: in <a href=22.html>OpenBSD 2.2</a>. Some of these problems still
1122: exist in other operating systems. (If you are running OpenBSD 2.1, we
1123: would strongly recommend an upgrade to the newest release, as this
1124: patch list only attempts at fixing the most important security
1125: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1126: security problems. Many of those problems were solved in ways which
1127: make it hard for us to provide patches).
1128:
1.96 deraadt 1129: <p>
1.52 deraadt 1130: <ul>
1.112 philen 1131: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1132: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1133: (patch included)</a>
1.112 philen 1134: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1135: </ul>
1.51 deraadt 1136:
1.106 deraadt 1137: <p>
1138: <li>
1.288 matthieu 1139: <a name="20"></a>
1.235 miod 1140:
1.110 deraadt 1141: <h3><font color=#e00000>OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1142: These are the OpenBSD 2.0 advisories. All these problems are solved
1143: in <a href=21.html>OpenBSD 2.1</a>. Some of these problems still
1144: exist in other operating systems. (If you are running OpenBSD 2.0, we
1145: commend you for being there back in the old days!, but you're really
1146: missing out if you don't install a new version!)
1147:
1148: <p>
1149: <ul>
1.112 philen 1150: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1151: resolver (patch included)</a>
1152: <li>Many others... if people can hunt them down, please let me know
1153: and we'll put them up here.
1154: </ul>
1155:
1.106 deraadt 1156: </dl>
1.51 deraadt 1157: <p>
1.106 deraadt 1158:
1.288 matthieu 1159: <a name="watching"></a>
1.110 deraadt 1160: <li><h3><font color=#e00000>Watching our Changes</font></h3><p>
1.106 deraadt 1161:
1.21 deraadt 1162: Since we take a proactive stance with security, we are continually
1163: finding and fixing new security problems. Not all of these problems
1.80 espie 1164: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1165: confirmed to be exploitable; many simple bugs we fix do turn out to
1166: have security consequences we could not predict. We do not have the
1167: time resources to make these changes available in the above format.<p>
1.21 deraadt 1168:
1169: Thus there are usually minor security fixes in the current source code
1170: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1171: guarantee that these problems are of minimal impact and unproven
1.44 ian 1172: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1173: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1174:
1.45 deraadt 1175: People who are really concerned with security can do a number of
1176: things:<p>
1.21 deraadt 1177:
1178: <ul>
1179: <li>If you understand security issues, watch our
1.27 deraadt 1180: <a href=mail.html>source-changes mailing list</a> and keep an
1.23 deraadt 1181: eye out for things which appear security related. Since
1.21 deraadt 1182: exploitability is not proven for many of the fixes we make,
1183: do not expect the relevant commit message to say "SECURITY FIX!".
1184: If a problem is proven and serious, a patch will be available
1185: here very shortly after.
1.161 horacio 1186: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1187: security-announce mailing list</a> which will notify you for every
1.186 ian 1188: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1189: and instruct you on how to patch the problem.
1.21 deraadt 1190: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1191: complete system build from time to time (read /usr/src/Makefile
1192: carefully). Users can make the assumption that the current
1193: source tree always has stronger security than the previous release.
1.45 deraadt 1194: However, building your own system from source code is not trivial;
1.265 miod 1195: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1196: transition between major releases.
1.115 ericj 1197: <li>Install a binary snapshot for your
1.80 espie 1198: architecture, which are made available fairly often. For
1.29 deraadt 1199: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1200: </ul>
1201:
1.9 deraadt 1202: <p>
1.288 matthieu 1203: <a name="reporting"></a>
1.110 deraadt 1204: <li><h3><font color=#e00000>Reporting problems</font></h3><p>
1.3 deraadt 1205:
1.5 deraadt 1206: <p> If you find a new security problem, you can mail it to
1.6 deraadt 1207: <a href=mailto:deraadt@openbsd.org>deraadt@openbsd.org</a>.
1.7 deraadt 1208: <br>
1.5 deraadt 1209: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1210: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1211:
1.107 deraadt 1212: <p>
1.288 matthieu 1213: <a name="papers"></a>
1.110 deraadt 1214: <li><h3><font color=#e00000>Further Reading</font></h3><p>
1.107 deraadt 1215:
1216: A number of papers have been written by OpenBSD team members, about security
1217: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1218: documents are available as follows.<p>
1.107 deraadt 1219:
1220: <ul>
1.113 deraadt 1221: <li>A Future-Adaptable Password Scheme.<br>
1.118 deraadt 1222: <a href=events.html#usenix99>Usenix 1999</a>,
1.153 jufi 1223: by <a href=mailto:provos@openbsd.org>Niels Provos</a>,
1.113 deraadt 1224: <a href=mailto:dm@openbsd.org>David Mazieres</a>.<br>
1.107 deraadt 1225: <a href=papers/bcrypt-paper.ps>paper</a> and
1226: <a href=papers/bcrypt-slides.ps>slides</a>.
1.113 deraadt 1227: <p>
1228: <li>Cryptography in OpenBSD: An Overview.<br>
1.118 deraadt 1229: <a href=events.html#usenix99>Usenix 1999</a>,
1.113 deraadt 1230: by <a href=mailto:deraadt@openbsd.org>Theo de Raadt</a>,
1231: <a href=mailto:niklas@openbsd.org>Niklas Hallqvist</a>,
1232: <a href=mailto:art@openbsd.org>Artur Grabowski</a>,
1233: <a href=mailto:angelos@openbsd.org>Angelos D. Keromytis</a>,
1234: <a href=mailto:provos@openbsd.org>Niels Provos</a>.<br>
1.107 deraadt 1235: <a href=papers/crypt-paper.ps>paper</a> and
1236: <a href=papers/crypt-slides.ps>slides</a>.
1.113 deraadt 1237: <p>
1238: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.118 deraadt 1239: <a href=events.html#usenix99>Usenix 1999</a>,
1.113 deraadt 1240: by <a href=mailto:millert@openbsd.org>Todd C. Miller</a>,
1241: <a href=mailto:deraadt@openbsd.org>Theo de Raadt</a>.<br>
1.109 deraadt 1242: <a href=papers/strlcpy-paper.ps>paper</a> and
1243: <a href=papers/strlcpy-slides.ps>slides</a>.
1.113 deraadt 1244: <p>
1.118 deraadt 1245: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1246: <a href=events.html#lisa99>LISA 1999</a>,
1247: by <a href=mailto:beck@openbsd.org>Bob Beck</a>.<br>
1248: <a href=papers/authgw-paper.ps>paper</a> and
1249: <a href=papers/authgw-slides.ps>slides</a>.
1250: <p>
1.153 jufi 1251: <li>Encrypting Virtual Memory<br>
1.142 deraadt 1252: <a href=events.html#sec2000>Usenix Security 2000</a>,
1253: <a href=mailto:provos@openbsd.org>Niels Provos</a>.<br>
1.143 provos 1254: <a href=papers/swapencrypt.ps>paper</a> and
1255: <a href=papers/swapencrypt-slides.ps>slides</a>.
1.142 deraadt 1256: <p>
1.107 deraadt 1257: </ul>
1258:
1.106 deraadt 1259: </dl>
1260:
1.2 deraadt 1261: <hr>
1.68 pauls 1262: <a href=index.html><img height=24 width=24 src=back.gif border=0 alt=OpenBSD></a>
1.24 deraadt 1263: <a href=mailto:www@openbsd.org>www@openbsd.org</a>
1264: <br>
1.293 ! brad 1265: <small>$OpenBSD: security.html,v 1.292 2004/06/11 03:48:57 brad Exp $</small>
1.1 deraadt 1266:
1.24 deraadt 1267: </body>
1268: </html>