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1.106 deraadt 17: <p>
1.294 david 18: <h2><font color="#e00000">Security</font></h2>
19: <hr>
1.1 deraadt 20:
1.114 philen 21: <table width="100%">
22: <tr>
23: <td colspan="2">
24: <strong>Index</strong>
25: </td>
26: </tr>
27: <tr>
28: <td valign="top">
1.294 david 29: <a href="#goals">Security goals of the Project</a>.<br>
30: <a href="#disclosure">Full Disclosure policy</a>.<br>
31: <a href="#process">Source code auditing process</a>.<br>
32: <a href="#default">"Secure by Default"</a>.<br>
33: <a href="#crypto">Use of Cryptography</a>.<br>
34: <p>
35: <a href="#watching">Watching changes</a>.<br>
36: <a href="#reporting">Reporting security issues</a>.<br>
37: <a href="#papers">Further Reading</a><br>
1.106 deraadt 38: <p>
1.114 philen 39: </td>
40: <td valign="top">
1.225 deraadt 41: For security advisories for specific releases, click below:<br>
42: <a href="#20">2.0</a>,
43: <a href="#21">2.1</a>,
44: <a href="#22">2.2</a>,
45: <a href="#23">2.3</a>,
46: <a href="#24">2.4</a>,
47: <a href="#25">2.5</a>,
48: <a href="#26">2.6</a>,
49: <a href="#27">2.7</a>,
50: <a href="#28">2.8</a>,
51: <a href="#29">2.9</a>,
52: <a href="#30">3.0</a>,
53: <a href="#31">3.1</a>,
1.246 deraadt 54: <a href="#32">3.2</a>,
1.261 david 55: <a href="#33">3.3</a>,
1.280 david 56: <a href="#34">3.4</a>,
57: <a href="#35">3.5</a>.
1.114 philen 58: </td>
59: </tr>
60: </table>
1.56 deraadt 61: <hr>
62:
1.294 david 63: <a name="goals"></a>
1.278 deraadt 64: <ul>
1.294 david 65: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 66:
1.14 deraadt 67: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 68: ONE in the industry for security (if we are not already there). Our
69: open software development model permits us to take a more
70: uncompromising view towards increased security than Sun, SGI, IBM, HP,
71: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 72: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 73: cryptography</a>, we are able to take cryptographic approaches towards
74: fixing security problems.<p>
1.18 deraadt 75:
1.288 matthieu 76: <a name="disclosure"></a>
1.294 david 77: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 78:
1.45 deraadt 79: Like many readers of the
1.196 jufi 80: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 81: BUGTRAQ mailing list</a>,
1.106 deraadt 82: we believe in full disclosure of security problems. In the
83: operating system arena, we were probably the first to embrace
84: the concept. Many vendors, even of free software, still try
85: to hide issues from their users.<p>
86:
87: Security information moves very fast in cracker circles. On the other
88: hand, our experience is that coding and releasing of proper security
89: fixes typically requires about an hour of work -- very fast fix
90: turnaround is possible. Thus we think that full disclosure helps the
91: people who really care about security.<p>
92:
1.288 matthieu 93: <a name="process"></a>
1.294 david 94: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 95:
1.12 deraadt 96: Our security auditing team typically has between six and twelve
1.45 deraadt 97: members who continue to search for and fix new security holes. We
98: have been auditing since the summer of 1996. The process we follow to
99: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 100: every critical software component. We are not so much looking for
101: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 102: years later someone discovers the problem used to be a security
1.106 deraadt 103: issue, and we fixed it because it was just a bug, well, all the
104: better. Flaws have been found in just about every area of the system.
105: Entire new classes of security problems have been found during our
106: audit, and often source code which had been audited earlier needs
107: re-auditing with these new flaws in mind. Code often gets audited
108: multiple times, and by multiple people with different auditing
109: skills.<p>
1.12 deraadt 110:
1.94 deraadt 111: Some members of our security auditing team worked for Secure Networks,
112: the company that made the industry's premier network security scanning
113: software package Ballista (Secure Networks got purchased by Network
114: Associates, Ballista got renamed to Cybercop Scanner, and well...)
115: That company did a lot of security research, and thus fit in well
1.106 deraadt 116: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
117: colours since day 1.<p>
1.31 deraadt 118:
1.34 deraadt 119: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 120: In most cases we have found that the determination of exploitability
121: is not an issue. During our ongoing auditing process we find many
122: bugs, and endeavor to fix them even though exploitability is not
123: proven. We fix the bug, and we move on to find other bugs to fix. We
124: have fixed many simple and obvious careless programming errors in code
125: and only months later discovered that the problems were in fact
126: exploitable. (Or, more likely someone on
1.197 jufi 127: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 128: would report that other operating systems were vulnerable to a `newly
129: discovered problem', and then it would be discovered that OpenBSD had
130: been fixed in a previous release). In other cases we have been saved
131: from full exploitability of complex step-by-step attacks because we
132: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 133: managed such a success is the lpd advisory that Secure Networks put out.
134: <p>
1.29 deraadt 135:
1.288 matthieu 136: <a name="newtech"></a>
1.294 david 137: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 138:
139: As we audit source code, we often invent new ways of solving problems.
140: Sometimes these ideas have been used before in some random application
141: written somewhere, but perhaps not taken to the degree that we do.
142: <p>
143:
144: <ul>
145: <li>strlcpy() and strlcat()
146: <li>Memory protection purify
147: <ul>
148: <li>W^X
149: <li>.rodata segment
150: <li>Guard pages
151: <li>Randomized malloc()
152: <li>Randomized mmap()
153: <li>atexit() and stdio protection
154: </ul>
1.295 otto 155: <li>Privilege separation
1.278 deraadt 156: <li>Privilege revocation
157: <li>Chroot jailing
158: <li>New uids
159: <li>ProPolice
160: <li>... and others
161: </ul>
162: <p>
163:
1.294 david 164: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 165:
1.45 deraadt 166: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 167: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 168: commonplace in security forums like
1.197 jufi 169: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 170:
1.45 deraadt 171: The most intense part of our security auditing happened immediately
1.80 espie 172: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 173: over the last third of 1996 and first half of 1997. Thousands (yes,
174: thousands) of security issues were fixed rapidly over this year-long
175: period; bugs like the standard buffer overflows, protocol
176: implementation weaknesses, information gathering, and filesystem
177: races. Hence most of the security problems that we encountered were
178: fixed before our 2.1 release, and then a far smaller number needed
179: fixing for our 2.2 release. We do not find as many problems anymore,
180: it is simply a case of diminishing returns. Recently the security
181: problems we find and fix tend to be significantly more obscure or
182: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 183:
1.35 deraadt 184: <ul>
1.45 deraadt 185: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 186: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 187: to search for more complicated exploits, so we will too.
188: <li>Finding and fixing subtle flaws in complicated software is
189: a lot of fun.
1.35 deraadt 190: </ul>
1.106 deraadt 191: <p>
1.15 deraadt 192:
1.14 deraadt 193: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 194: to find and fix new security flaws.<p>
1.12 deraadt 195:
1.288 matthieu 196: <a name="default"></a>
1.294 david 197: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 198:
199: To ensure that novice users of OpenBSD do not need to become security
200: experts overnight (a viewpoint which other vendors seem to have), we
201: ship the operating system in a Secure by Default mode. All non-essential
202: services are disabled. As the user/administrator becomes more familiar
203: with the system, he will discover that he has to enable daemons and other
204: parts of the system. During the process of learning how to enable a new
205: service, the novice is more likely to learn of security considerations.<p>
206:
207: This is in stark contrast to the increasing number of systems that
208: ship with NFS, mountd, web servers, and various other services enabled
209: by default, creating instantaneous security problems for their users
210: within minutes after their first install.<p>
211:
1.288 matthieu 212: <a name="crypto"></a>
1.294 david 213: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 214:
215: And of course, since the OpenBSD project is based in Canada, it is possible
216: for us to integrate cryptography. For more information, read the page
1.116 deraadt 217: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 218:
1.294 david 219: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 220:
221: <li>
1.288 matthieu 222: <a name="35"></a>
1.279 deraadt 223:
1.294 david 224: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 225: These are the OpenBSD 3.5 advisories -- all these problems are solved
226: in <a href=anoncvs.html>OpenBSD current</a> and the
227: <a href=stable.html>patch branch</a>.
228:
229: <p>
230: <ul>
1.294 david 231: <li><a href="errata.html#httpd"> Jun 12, 2004:
1.293 brad 232: Multiple vulnerabilites have been found in httpd(8) / mod_ssl.</a>
1.294 david 233: <li><a href="errata.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 234: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 235: an attacker can delete IPsec tunnels at will.</a>
1.294 david 236: <li><a href="errata.html#cvs3"> Jun 9, 2004:
1.290 millert 237: Multiple remote vulnerabilities have been found in the cvs(1)
238: server which can be used by CVS clients to crash or execute
1.293 brad 239: arbitrary code on the server.</a>
1.294 david 240: <li><a href="errata.html#kerberos"> May 30, 2004:
1.289 beck 241: kdc(8) performs inadequate checking of request fields, leading
242: to the possibility of principal impersonation from other
243: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 244: <li><a href="errata.html#xdm"> May 26, 2004:
1.287 matthieu 245: xdm(1) ignores the requestPort resource and creates a
1.293 brad 246: listening socket regardless of the setting in xdm-config.</a>
1.294 david 247: <li><a href="errata.html#cvs2"> May 20, 2004:
1.286 otto 248: A buffer overflow in the cvs(1) server has been found,
249: which can be used by CVS clients to execute arbitrary code on
1.293 brad 250: the server.</a>
1.294 david 251: <li><a href="errata.html#procfs"> May 13, 2004:
1.282 tedu 252: Integer overflow problems were found in procfs, allowing
1.293 brad 253: reading of arbitrary kernel memory.</a>
1.294 david 254: <li><a href="errata.html#cvs"> May 5, 2004:
1.281 otto 255: Pathname validation problems have been found in cvs(1),
256: allowing clients and servers access to files outside the
1.293 brad 257: repository or local CVS tree.</a>
1.279 deraadt 258: </ul>
259:
260: <p>
261: <li>
1.288 matthieu 262: <a name="34"></a>
1.261 david 263:
1.294 david 264: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 265: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.294 david 266: in <a href="anoncvs.html">OpenBSD current</a> and the
267: <a href="stable.html">patch branch</a>.
1.261 david 268:
269: <p>
270: <ul>
1.294 david 271: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.293 brad 272: Multiple vulnerabilites have been found in httpd(8) / mod_ssl.</a>
1.294 david 273: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 274: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 275: an attacker can delete IPsec tunnels at will.</a>
1.294 david 276: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 277: Multiple remote vulnerabilities have been found in the cvs(1)
278: server which can be used by CVS clients to crash or execute
1.293 brad 279: arbitrary code on the server.</a>
1.294 david 280: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 281: kdc(8) performs inadequate checking of request fields, leading
282: to the possibility of principal impersonation from other
283: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 284: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 285: A buffer overflow in the cvs(1) server has been found,
286: which can be used by CVS clients to execute arbitrary code on
287: the server.</a>
1.294 david 288: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 289: Integer overflow problems were found in procfs, allowing
290: reading of arbitrary kernel memory.</a>
1.294 david 291: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 292: Pathname validation problems have been found in cvs(1),
293: allowing clients and servers access to files outside the
294: repository or local CVS tree.</a>
1.294 david 295: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 296: A missing check for a NULL-pointer dereference may allow a
1.281 otto 297: remote attacker to crash applications using OpenSSL.</a>
1.294 david 298: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 299: Defects in the payload validation and processing functions of
300: isakmpd have been discovered. An attacker could send malformed
301: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 302: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 303: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
304: access module, using IP addresses without a netmask on big endian
305: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 306: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 307: An IPv6 MTU handling problem exists that could be used by an
308: attacker to cause a denial of service attack.</a>
1.294 david 309: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 310: A reference counting bug in shmat(2) could be used to write to
311: kernel memory under certain circumstances.</a>
1.294 david 312: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 313: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 314: by Thomas Walpuski.</a>
1.294 david 315: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 316: It may be possible for a local user to overrun the stack in
317: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 318: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 319: The use of certain ASN.1 encodings or malformed public keys may
320: allow an attacker to mount a denial of service attack against
321: applications linked with ssl(3).</a>
1.261 david 322: </ul>
323:
324: <p>
1.284 otto 325: OpenBSD 3.3 and earlier releases are not supported anymore. The following
326: paragraphs only list advisories issued while they were maintained; these
327: releases are likely to be affected by the advisories for more recent releases.
328: <br>
329:
1.261 david 330: <li>
1.288 matthieu 331: <a name="33"></a>
1.246 deraadt 332:
1.294 david 333: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 334: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 335: in <a href="anoncvs.html">OpenBSD current</a>. The
336: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 337: you should update your machine.
1.246 deraadt 338: <p>
339: <ul>
1.294 david 340: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 341: Pathname validation problems have been found in cvs(1),
342: allowing clients and servers access to files outside the
343: repository or local CVS tree.</a>
1.294 david 344: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 345: A missing check for a NULL-pointer dereference may allow a
1.281 otto 346: remote attacker to crash applications using OpenSSL.</a>
1.294 david 347: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 348: Defects in the payload validation and processing functions of
349: isakmpd have been discovered. An attacker could send malformed
350: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 351: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 352: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
353: access module, using IP addresses without a netmask on big endian
354: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 355: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 356: An IPv6 MTU handling problem exists that could be used by an
357: attacker to cause a denial of service attack.</a>
1.294 david 358: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 359: A reference counting bug in shmat(2) could be used to write to
360: kernel memory under certain circumstances.</a>
1.294 david 361: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 362: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 363: by Thomas Walpuski.</a>
1.294 david 364: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 365: It may be possible for a local user to execute arbitrary code
366: resulting in escalation of privileges due to a stack overrun
367: in compat_ibcs2(8).</a>
1.294 david 368: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 369: The use of certain ASN.1 encodings or malformed public keys may
370: allow an attacker to mount a denial of service attack against
371: applications linked with ssl(3).</a>
1.294 david 372: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 373: Access of freed memory in pf(4) could be used to
1.260 margarid 374: remotely panic a machine using scrub rules.</a>
1.294 david 375: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 376: A buffer overflow in the address parsing in
377: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 378: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 379: OpenSSH versions prior to 3.7 contains a buffer management error
380: that is potentially exploitable.</a>
1.294 david 381: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 382: Root may be able to reduce the security level by taking advantage of
383: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 384: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 385: An improper bounds check in the kernel may allow a local user
386: to panic the kernel.</a>
1.294 david 387: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 388: An off-by-one error exists in the C library function realpath(3)
389: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 390: </ul>
391:
1.265 miod 392:
1.247 david 393: <p>
1.246 deraadt 394: <li>
1.288 matthieu 395: <a name="32"></a>
1.224 deraadt 396:
1.294 david 397: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 398: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 399: in <a href="anoncvs.html">OpenBSD current</a>. The
400: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 401: you should update your machine.
1.224 deraadt 402: <p>
403: <ul>
1.294 david 404: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 405: The use of certain ASN.1 encodings or malformed public keys may
406: allow an attacker to mount a denial of service attack against
407: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 408: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 409: Access of freed memory in pf(4) could be used to
1.260 margarid 410: remotely panic a machine using scrub rules.</a>
1.294 david 411: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 412: A buffer overflow in the address parsing in
413: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 414: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 415: OpenSSH versions prior to 3.7 contains a buffer management error
416: that is potentially exploitable.</a>
1.294 david 417: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 418: Fix for a potential security issue in
419: sendmail(8) with respect to DNS maps.</a>
1.294 david 420: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 421: An off-by-one error exists in the C library function realpath(3)
422: may allow an attacker to gain escalated privileges.</a>
1.294 david 423: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 424: A buffer overflow in the address parsing in
425: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 426: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 427: A cryptographic weaknesses in the Kerberos v4 protocol can be
428: exploited on Kerberos v5 as well.</a>
1.294 david 429: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 430: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 431: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 432: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 433: Various SSL and TLS operations in OpenSSL are vulnerable to
434: timing attacks.</a>
1.294 david 435: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 436: A buffer overflow in lprm(1) may allow an attacker to elevate
437: privileges to user daemon.</a>.
1.294 david 438: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 439: A buffer overflow in the envelope comments processing in
440: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 441: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 442: httpd(8) leaks file inode numbers via ETag header as well as
443: child PIDs in multipart MIME boundary generation. This could
444: lead, for example, to NFS exploitation because it uses inode
445: numbers as part of the file handle.</a>
1.294 david 446: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 447: In ssl(8) an information leak can occur via timing by performing
448: a MAC computation even if incorrect block cipher padding has
449: been found, this is a countermeasure. Also, check for negative
450: sizes, in allocation routines.</a>
1.294 david 451: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 452: A double free exists in cvs(1) that could lead to privilege
453: escalation for cvs configurations where the cvs command is
1.233 margarid 454: run as a privileged user.</a>
1.294 david 455: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 456: A buffer overflow exists in named(8) that could lead to a
457: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 458: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 459: A logic error in the pool kernel memory allocator could cause
460: memory corruption in low-memory situations, causing the system
461: to crash.</a>
1.294 david 462: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 463: An attacker can bypass smrsh(8)'s restrictions and execute
464: arbitrary commands with the privileges of his own account.</a>
1.294 david 465: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 466: Network bridges running pf with scrubbing enabled could cause
467: mbuf corruption, causing the system to crash.</a>
1.294 david 468: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 469: A buffer overflow can occur in the kadmind(8) daemon, leading
470: to possible remote crash or exploit.</a>
1.224 deraadt 471: </ul>
472:
1.227 miod 473: <p>
474: <li>
1.288 matthieu 475: <a name="31"></a>
1.203 deraadt 476:
1.294 david 477: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 478: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 479: in <a href="anoncvs.html">OpenBSD current</a>. The
480: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 481: you should update your machine.
1.203 deraadt 482:
483: <p>
484: <ul>
1.294 david 485: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 486: A buffer overflow in the address parsing in
487: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 488: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 489: A cryptographic weaknesses in the Kerberos v4 protocol can be
490: exploited on Kerberos v5 as well.</a>
1.294 david 491: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 492: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 493: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 494: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 495: Various SSL and TLS operations in OpenSSL are vulnerable to
496: timing attacks.</a>
1.294 david 497: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 498: A buffer overflow in lprm(1) may allow an attacker to gain
499: root privileges.</a>
1.294 david 500: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 501: A buffer overflow in the envelope comments processing in
502: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 503: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 504: In ssl(8) an information leak can occur via timing by performing
505: a MAC computation even if incorrect block cipher padding has
506: been found, this is a countermeasure. Also, check for negative
507: sizes, in allocation routines.</a>
1.294 david 508: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 509: A double free exists in cvs(1) that could lead to privilege
510: escalation for cvs configurations where the cvs command is
1.294 david 511: run as a privileged user</a>.
512: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 513: A buffer overflow exists in named(8) that could lead to a
514: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 515: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 516: Incorrect argument checking in the getitimer(2) system call
517: may allow an attacker to crash the system.</a>
1.294 david 518: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 519: An attacker can bypass smrsh(8)'s restrictions and execute
520: arbitrary commands with the privileges of his own account.</a>
1.294 david 521: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 522: A buffer overflow can occur in the kadmind(8) daemon, leading
523: to possible remote crash or exploit.</a>
1.294 david 524: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 525: Incorrect argument checking in the setitimer(2) system call
526: may allow an attacker to write to kernel memory.</a>
1.294 david 527: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 528: An insufficient boundary check in the select system call
1.220 miod 529: allows an attacker to overwrite kernel memory and execute arbitrary code
530: in kernel context.</a>
1.294 david 531: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 532: Several remote buffer overflows can occur in the SSL2 server and SSL3
533: client of the ssl(8) library, as in the ASN.1 parser code in the
534: crypto(3) library, all of them being potentially remotely
535: exploitable.</a>
1.294 david 536: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 537: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
538: possible remote crash.</a>
1.294 david 539: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 540: A race condition exists in the pppd(8) daemon which may cause it to
541: alter the file permissions of an arbitrary file.</a>
1.294 david 542: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 543: Receiving IKE payloads out of sequence can cause isakmpd(8) to
544: crash.</a>
1.294 david 545: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 546: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 547: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 548: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 549: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 550: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 551: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 552: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 553: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 554: input validation error that can result in an integer overflow and
555: privilege escalation.</a>
1.294 david 556: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 557: A buffer overflow can occur during the interpretation of chunked
558: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 559: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 560: Under certain conditions, on systems using YP with netgroups
561: in the password database, it is possible that sshd(8) does
562: ACL checks for the requested user name but uses the password
563: database entry of a different user for authentication. This
564: means that denied users might authenticate successfully
565: while permitted users could be locked out.</a>
1.294 david 566: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 567: A race condition exists that could defeat the kernel's
568: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 569: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 570: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 571: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 572: A local user can gain super-user privileges due to a buffer
573: overflow in sshd(8) if AFS has been configured on the system
574: or if KerberosTgtPassing or AFSTokenPassing has been enabled
575: in the sshd_config file.</a>
1.203 deraadt 576: </ul>
577:
1.235 miod 578: <p>
1.203 deraadt 579: <li>
1.288 matthieu 580: <a name="30"></a>
1.187 deraadt 581:
1.294 david 582: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 583: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 584: in <a href="anoncvs.html">OpenBSD current</a>. The
585: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 586: you should update your machine.
1.187 deraadt 587:
588: <p>
589: <ul>
1.294 david 590: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 591: A buffer overflow exists in named(8) that could lead to a
592: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 593: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 594: Incorrect argument checking in the getitimer(2) system call
595: may allow an attacker to crash the system.</a>
1.294 david 596: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 597: An attacker can bypass smrsh(8)'s restrictions and execute
598: arbitrary commands with the privileges of his own account.</a>
1.294 david 599: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 600: A buffer overflow can occur in the kadmind(8) daemon, leading
601: to possible remote crash or exploit.</a>
1.294 david 602: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 603: Incorrect argument checking in the setitimer(2) system call
604: may allow an attacker to write to kernel memory.</a>
1.294 david 605: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 606: An insufficient boundary check in the select and poll system calls
607: allows an attacker to overwrite kernel memory and execute arbitrary code
608: in kernel context.</a>
1.294 david 609: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 610: Several remote buffer overflows can occur in the SSL2 server and SSL3
611: client of the ssl(8) library, as in the ASN.1 parser code in the
612: crypto(3) library, all of them being potentially remotely
613: exploitable.</a>
1.294 david 614: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 615: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
616: possible remote crash.</a>
1.294 david 617: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 618: A race condition exists in the pppd(8) daemon which may cause it to
619: alter the file permissions of an arbitrary file.</a>
1.294 david 620: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 621: Receiving IKE payloads out of sequence can cause isakmpd(8) to
622: crash.</a>
1.294 david 623: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 624: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 625: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 626: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 627: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 628: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 629: input validation error that can result in an integer overflow and
630: privilege escalation.</a>
1.294 david 631: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 632: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 633: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 634: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 635: A buffer overflow can occur during the interpretation of chunked
636: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 637: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 638: A race condition exists that could defeat the kernel's
639: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 640: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 641: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 642: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 643: A local user can gain super-user privileges due to a buffer
644: overflow in sshd(8) if AFS has been configured on the system
645: or if KerberosTgtPassing or AFSTokenPassing has been enabled
646: in the sshd_config file.</a>
1.294 david 647: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 648: The mail(1) was interpreting tilde escapes even when invoked
649: in non-interactive mode. As mail(1) is called as root from cron,
650: this can lead to a local root compromise.</a>
1.294 david 651: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 652: Under certain conditions, on systems using YP with netgroups in
653: the password database, it is possible for the rexecd(8) and rshd(8)
654: daemons to execute a shell from a password database entry for a
655: different user. Similarly, atrun(8) may change to the wrong
656: home directory when running jobs.</a>
1.294 david 657: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 658: A potential double free() exists in the zlib library;
659: this is not exploitable on OpenBSD.
660: The kernel also contains a copy of zlib; it is not
661: currently known if the kernel zlib is exploitable.</a>
1.294 david 662: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 663: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 664: may allow a local user to gain super-user privileges.</a>
1.294 david 665: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 666: A race condition between the ptrace(2) and execve(2) system calls
667: allows an attacker to modify the memory contents of suid/sgid
668: processes which could lead to compromise of the super-user account.</a>
1.294 david 669: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 670: There is a security hole in sudo(8) that can be exploited
671: when the Postfix sendmail replacement is installed that may
672: allow an attacker on the local host to gain root privileges.</a>
1.294 david 673: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 674: An attacker can trick a machine running the lpd daemon into
675: creating new files in the root directory from a machine with
676: remote line printer access.</a>
1.294 david 677: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 678: The vi.recover script can be abused in such a way as
679: to cause arbitrary zero-length files to be removed.</a>
1.294 david 680: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 681: pf(4) was incapable of dealing with certain ipv6 icmp packets,
682: resulting in a crash.</a>
1.294 david 683: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 684: A security hole that may allow an attacker to partially authenticate
685: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 686: </ul>
687:
688: <p>
689: <li>
1.288 matthieu 690: <a name="29"></a>
1.173 deraadt 691:
1.294 david 692: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 693: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 694: in <a href="anoncvs.html">OpenBSD current</a>. The
695: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 696: you should update your machine.
697:
1.173 deraadt 698:
699: <p>
700: <ul>
1.294 david 701: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 702: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 703: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 704: A race condition exists that could defeat the kernel's
705: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 706: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 707: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 708: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 709: A local user can gain super-user privileges due to a buffer
710: overflow in sshd(8) if AFS has been configured on the system
711: or if KerberosTgtPassing or AFSTokenPassing has been enabled
712: in the sshd_config file.</a>
1.294 david 713: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 714: The mail(1) was interpreting tilde escapes even when invoked
715: in non-interactive mode. As mail(1) is called as root from cron,
716: this can lead to a local root compromise.</a>
1.294 david 717: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 718: A potential double free() exists in the zlib library;
719: this is not exploitable on OpenBSD.
720: The kernel also contains a copy of zlib; it is not
721: currently known if the kernel zlib is exploitable.</a>
1.294 david 722: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 723: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 724: may allow a local user to gain super-user privileges.</a>
1.294 david 725: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 726: A race condition between the ptrace(2) and execve(2) system calls
727: allows an attacker to modify the memory contents of suid/sgid
728: processes which could lead to compromise of the super-user account.</a>
1.294 david 729: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 730: There is a security hole in sudo(8) that can be exploited
731: when the Postfix sendmail replacement is installed that may
732: allow an attacker on the local host to gain root privileges.</a>
1.294 david 733: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 734: An attacker can trick a machine running the lpd daemon into
735: creating new files in the root directory from a machine with
736: remote line printer access.</a>
1.294 david 737: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 738: The vi.recover script can be abused in such a way as
739: to cause arbitrary zero-length files to be removed.</a>
1.294 david 740: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 741: A security hole exists in uuxqt(8) that may allow an
742: attacker to gain root privileges.</a>
1.294 david 743: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 744: A security hole exists in lpd(8) that may allow an
745: attacker to gain root privileges if lpd is running.</a>
1.294 david 746: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 747: A security hole exists in sendmail(8) that may allow an
748: attacker on the local host to gain root privileges.</a>
1.294 david 749: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 750: A kernel buffer overflow in the NFS code can be used to execute
751: arbitrary code by users with mount privileges (only root by
1.181 millert 752: default).</a>
1.294 david 753: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 754: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 755: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 756: sshd(8) allows users to delete arbitrary files named "cookies"
757: if X11 forwarding is enabled. X11 forwarding is disabled
758: by default.</a>
1.294 david 759: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 760: Programs using the fts routines can be tricked into changing
761: into the wrong directory.</a>
1.294 david 762: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 763: Sendmail signal handlers contain unsafe code,
764: leading to numerous race conditions.</a>
1.173 deraadt 765: </ul>
766:
767: <p>
768: <li>
1.288 matthieu 769: <a name="28"></a>
1.152 deraadt 770:
1.294 david 771: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 772: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 773: in <a href="anoncvs.html">OpenBSD current</a>. The
774: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 775: you should update your machine.
776:
1.152 deraadt 777:
778: <p>
779: <ul>
1.294 david 780: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 781: A security hole exists in uuxqt(8) that may allow an
782: attacker to gain root privileges.</a>
1.294 david 783: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 784: A security hole exists in lpd(8) that may allow an
785: attacker to gain root privileges if lpd is running.</a>
1.294 david 786: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 787: A security hole exists in sendmail(8) that may allow an
788: attacker on the local host to gain root privileges.</a>
1.294 david 789: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 790: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 791: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 792: Programs using the fts routines can be tricked into changing
793: into the wrong directory.</a>
1.294 david 794: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 795: Sendmail signal handlers contain unsafe code,
796: leading to numerous race conditions.</a>
1.294 david 797: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 798: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 799: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 800: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 801: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 802: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 803: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 804: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 805: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 806: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 807: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 808: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 809: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 810: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 811: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 812: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 813: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 814: rnd(4) did not use all of its input when written to.</a>
1.294 david 815: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 816: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 817: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 818: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 819: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 820: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 821: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 822: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 823: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 824: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 825: </ul>
826:
827: <p>
828: <li>
1.288 matthieu 829: <a name="27"></a>
1.124 deraadt 830:
1.294 david 831: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 832: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 833: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 834: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
835:
836: <p>
837: <ul>
1.294 david 838: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 839: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 840: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 841: a buffer overflow was fixed in sudo(8).</a>
1.294 david 842: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 843: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 844: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 845: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
846: (patch included)</a>
1.294 david 847: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 848: X11 libraries have 2 potential overflows in xtrans code.
849: (patch included)</a>
1.294 david 850: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 851: Apache mod_rewrite and mod_vhost_alias modules could expose files
852: on the server in certain configurations if used.
853: (patch included)</a>
1.294 david 854: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 855: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
856: TERMPATH and TERMCAP environment variables as it should.
857: (patch included)</a>
1.294 david 858: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 859: There are printf-style format string bugs in several privileged
860: programs. (patch included)</a>
1.294 david 861: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 862: libcurses honored terminal descriptions in the $HOME/.terminfo
863: directory as well as in the TERMCAP environment variable for
864: setuid and setgid applications.
1.146 deraadt 865: (patch included)</a>
1.294 david 866: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 867: A format string vulnerability exists in talkd(8).
868: (patch included)</a>
1.294 david 869: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 870: A format string vulnerability exists in the pw_error() function of the
871: libutil library, yielding localhost root through chpass(1).
872: (patch included)</a>
1.294 david 873: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 874: Bad ESP/AH packets could cause a crash under certain conditions.
875: (patch included)</a>
1.294 david 876: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 877: A format string vulnerability (localhost root) exists in xlock(1).
878: (patch included)</a>
1.294 david 879: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 880: Various bugs found in X11 libraries have various side effects, almost
881: completely denial of service in OpenBSD.
882: (patch included)</a>
1.294 david 883: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 884: Just like pretty much all the other unix ftp daemons
885: on the planet, ftpd had a remote root hole in it.
886: Luckily, ftpd was not enabled by default.
1.137 deraadt 887: The problem exists if anonymous ftp is enabled.
1.136 deraadt 888: (patch included)</a>
1.294 david 889: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 890: Mopd, very rarely used, contained some buffer overflows.
891: (patch included)</a>
1.294 david 892: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 893: libedit would check for a <b>.editrc</b> file in the current
894: directory. Not known to be a real security issue, but a patch
895: is available anyways.
896: (patch included)</a>
1.294 david 897: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 898: A serious bug in dhclient(8) could allow strings from a
899: malicious dhcp server to be executed in the shell as root.
900: (patch included)</a>
1.294 david 901: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 902: A serious bug in isakmpd(8) policy handling wherein
903: policy verification could be completely bypassed in isakmpd.
904: (patch included)</a>
1.294 david 905: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 906: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
907: should not be used, and results in security problems on
908: other operating systems.</a>
1.294 david 909: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 910: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 911: (patch included)</a>
1.294 david 912: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 913: Improper use of ipf <i>keep-state</i> rules can result
914: in firewall rules being bypassed. (patch included)</a>
915:
1.124 deraadt 916: </ul>
917:
918: <p>
919: <li>
1.288 matthieu 920: <a name="26"></a>
1.119 deraadt 921:
1.294 david 922: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 923: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 924: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 925: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
926:
927: <p>
928: <ul>
1.294 david 929: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 930: SYSV semaphore support contained an undocumented system call
1.131 deraadt 931: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 932: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 933: Improper use of ipf <i>keep-state</i> rules can result
934: in firewall rules being bypassed. (patch included)</a>
1.294 david 935: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 936: xlockmore has a bug which a localhost attacker can use to gain
937: access to the encrypted root password hash (which is normally
1.245 miod 938: encoded using blowfish</a> (see
1.294 david 939: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 940: crypt(3)</a>)
1.245 miod 941: (patch included).
1.294 david 942: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 943: Systems running with procfs enabled and mounted are
944: vulnerable to a very tricky exploit. procfs is not
945: mounted by default.
946: (patch included).</a>
1.294 david 947: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 ! david 948: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 949: thus exposing the system to a race where the aliases file
950: did not exist.
1.119 deraadt 951: (patch included).</a>
1.294 david 952: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 953: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 954: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 955: A buffer overflow in the RSAREF code included in the
956: USA version of libssl, is possibly exploitable in
957: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 958: (patch included).<br></a>
959: <strong>Update:</strong> Turns out that this was not exploitable
960: in any of the software included in OpenBSD 2.6.
1.294 david 961: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 962: Any user could change interface media configurations, resulting in
963: a localhost denial of service attack.
1.121 deraadt 964: (patch included).</a>
1.119 deraadt 965: </ul>
966:
967: <p>
968: <li>
1.288 matthieu 969: <a name="25"></a>
1.106 deraadt 970:
1.294 david 971: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 972: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 973: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 974: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
975:
1.96 deraadt 976: <p>
1.104 deraadt 977: <ul>
1.294 david 978: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 979: In cron(8), make sure argv[] is NULL terminated in the
980: fake popen() and run sendmail as the user, not as root.
981: (patch included).</a>
1.294 david 982: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 983: filesystems had an overrun in their handling of uio_offset
984: in their readdir() routines. (These filesystems are not
985: enabled by default). (patch included).</a>
1.294 david 986: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 987: when we execve() a new process. (patch included).</a>
1.294 david 988: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 989: been handled by IPsec may be transmitted as cleartext.
990: PF_KEY SA expirations may leak kernel resources.
991: (patch included).</a>
1.294 david 992: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 993: motd re-writing and change the find(1) to use -execdir
994: (patch included).</a>
1.294 david 995: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 996: users to chflags(2) or fchflags(2) on character or block devices
997: which they may currently be the owner of (patch included).</a>
1.294 david 998: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 999: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1000: </ul>
1001:
1.106 deraadt 1002: <p>
1003: <li>
1.288 matthieu 1004: <a name="24"></a>
1.235 miod 1005:
1.294 david 1006: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1007: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1008: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1009: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1010:
1.96 deraadt 1011: <p>
1.75 deraadt 1012: <ul>
1.294 david 1013: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1014: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1015: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1016: another kernel crash case caused by the <strong>crashme</strong>
1017: program (patch included).</a>
1.294 david 1018: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1019: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1020: (patch included).</a>
1.294 david 1021: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1022: existed in ping(8). (patch included).</a>
1.294 david 1023: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1024: the ipq, which could permit an attacker to cause a crash.
1025: (patch included).</a>
1.294 david 1026: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1027: kernel between accept(2) and select(2) could permit an attacker
1028: to hang sockets from remote.
1029: (patch included).</a>
1.294 david 1030: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1031: bog the machine excessively and cause problems.
1032: (patch included).</a>
1.294 david 1033: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1034: DDB interacted to possibly cause a crash.
1035: (patch included).</a>
1.294 david 1036: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1037: (patch included).</a>
1.294 david 1038: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1039: problem in bootpd(8). (patch included).</a>
1.294 david 1040: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1041: exploitable problem relating to environment variables in termcap
1042: and curses. (patch included).</a>
1.294 david 1043: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1044: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1045: </ul>
1046:
1.106 deraadt 1047: <p>
1048: <li>
1.288 matthieu 1049: <a name="23"></a>
1.235 miod 1050:
1.294 david 1051: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1052: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1053: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1054: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1055:
1.96 deraadt 1056: <p>
1.53 matthieu 1057: <ul>
1.294 david 1058: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1059: problem in bootpd(8). (patch included).</a>
1.294 david 1060: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1061: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1062: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1063: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1064: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1065: chpass(1) has a file descriptor leak which allows an
1066: attacker to modify /etc/master.passwd.</a>
1.294 david 1067: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1068: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1069: should not be executed with fd slots 0, 1, or 2 free.
1070: (patch included).</a>
1.294 david 1071: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1072: libraries (patches included).</a>
1.294 david 1073: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1074: processes too permissive (4th revision patch included).</a>
1.294 david 1075: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1076: of immutable and append-only file flags. (patch included).</a>
1.294 david 1077: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1078: if IPSEC is enabled (patch included).</a>
1.294 david 1079: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1080: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1081: </ul>
1.9 deraadt 1082:
1.106 deraadt 1083: <p>
1084: <li>
1.288 matthieu 1085: <a name="22"></a>
1.235 miod 1086:
1.294 david 1087: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1088: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1089: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1090: still exist in other operating systems. (The supplied patches are for
1091: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1092:
1.96 deraadt 1093: <p>
1.9 deraadt 1094: <ul>
1.294 david 1095: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1096: packets if IPSEC is enabled (patch included).</a>
1.294 david 1097: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1098: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1099: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1100: (patch included).</a>
1.294 david 1101: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1102: (patch included).</a>
1.294 david 1103: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1104: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1105: (patch included).</a>
1.294 david 1106: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1107: export (patch included).</a>
1.112 philen 1108: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1109: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1110: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1111: Acceptance.</a>
1.294 david 1112: A patch is available <a href="errata22.html#sourceroute">here</a>.
1113: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1114: flaw (patch included).</a>
1.294 david 1115: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1116: </ul>
1117:
1.106 deraadt 1118: <p>
1119: <li>
1.288 matthieu 1120: <a name="21"></a>
1.235 miod 1121:
1.294 david 1122: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1123: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1124: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1125: exist in other operating systems. (If you are running OpenBSD 2.1, we
1126: would strongly recommend an upgrade to the newest release, as this
1127: patch list only attempts at fixing the most important security
1128: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1129: security problems. Many of those problems were solved in ways which
1130: make it hard for us to provide patches).
1131:
1.96 deraadt 1132: <p>
1.52 deraadt 1133: <ul>
1.112 philen 1134: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1135: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1136: (patch included)</a>
1.112 philen 1137: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1138: </ul>
1.51 deraadt 1139:
1.106 deraadt 1140: <p>
1141: <li>
1.288 matthieu 1142: <a name="20"></a>
1.235 miod 1143:
1.294 david 1144: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1145: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1146: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1147: exist in other operating systems. (If you are running OpenBSD 2.0, we
1148: commend you for being there back in the old days!, but you're really
1149: missing out if you don't install a new version!)
1150:
1151: <p>
1152: <ul>
1.112 philen 1153: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1154: resolver (patch included)</a>
1155: <li>Many others... if people can hunt them down, please let me know
1156: and we'll put them up here.
1157: </ul>
1.51 deraadt 1158: <p>
1.106 deraadt 1159:
1.288 matthieu 1160: <a name="watching"></a>
1.294 david 1161: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1162:
1.21 deraadt 1163: Since we take a proactive stance with security, we are continually
1164: finding and fixing new security problems. Not all of these problems
1.80 espie 1165: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1166: confirmed to be exploitable; many simple bugs we fix do turn out to
1167: have security consequences we could not predict. We do not have the
1168: time resources to make these changes available in the above format.<p>
1.21 deraadt 1169:
1170: Thus there are usually minor security fixes in the current source code
1171: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1172: guarantee that these problems are of minimal impact and unproven
1.44 ian 1173: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1174: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1175:
1.45 deraadt 1176: People who are really concerned with security can do a number of
1177: things:<p>
1.21 deraadt 1178:
1179: <ul>
1180: <li>If you understand security issues, watch our
1.294 david 1181: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1182: eye out for things which appear security related. Since
1.21 deraadt 1183: exploitability is not proven for many of the fixes we make,
1184: do not expect the relevant commit message to say "SECURITY FIX!".
1185: If a problem is proven and serious, a patch will be available
1186: here very shortly after.
1.161 horacio 1187: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1188: security-announce mailing list</a> which will notify you for every
1.186 ian 1189: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1190: and instruct you on how to patch the problem.
1.21 deraadt 1191: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1192: complete system build from time to time (read /usr/src/Makefile
1193: carefully). Users can make the assumption that the current
1194: source tree always has stronger security than the previous release.
1.45 deraadt 1195: However, building your own system from source code is not trivial;
1.265 miod 1196: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1197: transition between major releases.
1.115 ericj 1198: <li>Install a binary snapshot for your
1.80 espie 1199: architecture, which are made available fairly often. For
1.29 deraadt 1200: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1201: </ul>
1202:
1.9 deraadt 1203: <p>
1.288 matthieu 1204: <a name="reporting"></a>
1.294 david 1205: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1206:
1.5 deraadt 1207: <p> If you find a new security problem, you can mail it to
1.294 david 1208: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1209: <br>
1.5 deraadt 1210: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1211: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1212:
1.107 deraadt 1213: <p>
1.288 matthieu 1214: <a name="papers"></a>
1.294 david 1215: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1216:
1217: A number of papers have been written by OpenBSD team members, about security
1218: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1219: documents are available as follows.<p>
1.107 deraadt 1220:
1221: <ul>
1.113 deraadt 1222: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1223: <a href="events.html#usenix99">Usenix 1999</a>,
1224: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1225: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1226: <a href="papers/bcrypt-paper.ps">paper</a> and
1227: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1228: <p>
1229: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1230: <a href="events.html#usenix99">Usenix 1999</a>,
1231: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1232: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1233: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1234: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1235: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1236: <a href="papers/crypt-paper.ps">paper</a> and
1237: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1238: <p>
1239: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1240: <a href="events.html#usenix99">Usenix 1999</a>,
1241: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1242: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1243: <a href="papers/strlcpy-paper.ps">paper</a> and
1244: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1245: <p>
1.118 deraadt 1246: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1247: <a href="events.html#lisa99">LISA 1999</a>,
1248: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1249: <a href="papers/authgw-paper.ps">paper</a> and
1250: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1251: <p>
1.153 jufi 1252: <li>Encrypting Virtual Memory<br>
1.294 david 1253: <a href="events.html#sec2000">Usenix Security 2000</a>,
1254: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1255: <a href="papers/swapencrypt.ps">paper</a> and
1256: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1257: <p>
1.107 deraadt 1258: </ul>
1.294 david 1259: </ul>
1.106 deraadt 1260:
1.2 deraadt 1261: <hr>
1.294 david 1262: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1263: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1264: <br>
1.296 ! david 1265: <small>$OpenBSD: security.html,v 1.295 2004/07/09 18:09:57 otto Exp $</small>
1.1 deraadt 1266:
1.24 deraadt 1267: </body>
1268: </html>
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