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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>
1.299 ! millert 231: <li><a href="errata.html#radius">Sep 20, 2004:
! 232: Radius-based authentication is vulnerable to spoofed replies.</a>
1.298 brad 233: <li><a href="errata.html#xpm">Sep 16, 2004:
234: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 235: <li><a href="errata.html#httpd2"> Sep 10, 2004:
236: httpd(8)'s mod_rewrite module can be made to write one zero byte in
237: an arbitrary memory position outside of a char array, causing a DoS
238: or possibly buffer overflows.</a>
1.294 david 239: <li><a href="errata.html#httpd"> Jun 12, 2004:
1.293 brad 240: Multiple vulnerabilites have been found in httpd(8) / mod_ssl.</a>
1.294 david 241: <li><a href="errata.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 242: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 243: an attacker can delete IPsec tunnels at will.</a>
1.294 david 244: <li><a href="errata.html#cvs3"> Jun 9, 2004:
1.290 millert 245: Multiple remote vulnerabilities have been found in the cvs(1)
246: server which can be used by CVS clients to crash or execute
1.293 brad 247: arbitrary code on the server.</a>
1.294 david 248: <li><a href="errata.html#kerberos"> May 30, 2004:
1.289 beck 249: kdc(8) performs inadequate checking of request fields, leading
250: to the possibility of principal impersonation from other
251: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 252: <li><a href="errata.html#xdm"> May 26, 2004:
1.287 matthieu 253: xdm(1) ignores the requestPort resource and creates a
1.293 brad 254: listening socket regardless of the setting in xdm-config.</a>
1.294 david 255: <li><a href="errata.html#cvs2"> May 20, 2004:
1.286 otto 256: A buffer overflow in the cvs(1) server has been found,
257: which can be used by CVS clients to execute arbitrary code on
1.293 brad 258: the server.</a>
1.294 david 259: <li><a href="errata.html#procfs"> May 13, 2004:
1.282 tedu 260: Integer overflow problems were found in procfs, allowing
1.293 brad 261: reading of arbitrary kernel memory.</a>
1.294 david 262: <li><a href="errata.html#cvs"> May 5, 2004:
1.281 otto 263: Pathname validation problems have been found in cvs(1),
264: allowing clients and servers access to files outside the
1.293 brad 265: repository or local CVS tree.</a>
1.279 deraadt 266: </ul>
267:
268: <p>
269: <li>
1.288 matthieu 270: <a name="34"></a>
1.261 david 271:
1.294 david 272: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 273: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.294 david 274: in <a href="anoncvs.html">OpenBSD current</a> and the
275: <a href="stable.html">patch branch</a>.
1.261 david 276:
277: <p>
278: <ul>
1.298 brad 279: <li><a href="errata34.html#xpm">Sep 16, 2004:
280: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 281: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
282: httpd(8)'s mod_rewrite module can be made to write one zero byte in
283: an arbitrary memory position outside of a char array, causing a DoS
284: or possibly buffer overflows.</a>
1.294 david 285: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.293 brad 286: Multiple vulnerabilites have been found in httpd(8) / mod_ssl.</a>
1.294 david 287: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 288: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 289: an attacker can delete IPsec tunnels at will.</a>
1.294 david 290: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 291: Multiple remote vulnerabilities have been found in the cvs(1)
292: server which can be used by CVS clients to crash or execute
1.293 brad 293: arbitrary code on the server.</a>
1.294 david 294: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 295: kdc(8) performs inadequate checking of request fields, leading
296: to the possibility of principal impersonation from other
297: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 298: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 299: A buffer overflow in the cvs(1) server has been found,
300: which can be used by CVS clients to execute arbitrary code on
301: the server.</a>
1.294 david 302: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 303: Integer overflow problems were found in procfs, allowing
304: reading of arbitrary kernel memory.</a>
1.294 david 305: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 306: Pathname validation problems have been found in cvs(1),
307: allowing clients and servers access to files outside the
308: repository or local CVS tree.</a>
1.294 david 309: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 310: A missing check for a NULL-pointer dereference may allow a
1.281 otto 311: remote attacker to crash applications using OpenSSL.</a>
1.294 david 312: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 313: Defects in the payload validation and processing functions of
314: isakmpd have been discovered. An attacker could send malformed
315: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 316: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 317: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
318: access module, using IP addresses without a netmask on big endian
319: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 320: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 321: An IPv6 MTU handling problem exists that could be used by an
322: attacker to cause a denial of service attack.</a>
1.294 david 323: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 324: A reference counting bug in shmat(2) could be used to write to
325: kernel memory under certain circumstances.</a>
1.294 david 326: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 327: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 328: by Thomas Walpuski.</a>
1.294 david 329: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 330: It may be possible for a local user to overrun the stack in
331: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 332: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 333: The use of certain ASN.1 encodings or malformed public keys may
334: allow an attacker to mount a denial of service attack against
335: applications linked with ssl(3).</a>
1.261 david 336: </ul>
337:
338: <p>
1.284 otto 339: OpenBSD 3.3 and earlier releases are not supported anymore. The following
340: paragraphs only list advisories issued while they were maintained; these
341: releases are likely to be affected by the advisories for more recent releases.
342: <br>
343:
1.261 david 344: <li>
1.288 matthieu 345: <a name="33"></a>
1.246 deraadt 346:
1.294 david 347: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 348: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 349: in <a href="anoncvs.html">OpenBSD current</a>. The
350: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 351: you should update your machine.
1.246 deraadt 352: <p>
353: <ul>
1.294 david 354: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 355: Pathname validation problems have been found in cvs(1),
356: allowing clients and servers access to files outside the
357: repository or local CVS tree.</a>
1.294 david 358: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 359: A missing check for a NULL-pointer dereference may allow a
1.281 otto 360: remote attacker to crash applications using OpenSSL.</a>
1.294 david 361: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 362: Defects in the payload validation and processing functions of
363: isakmpd have been discovered. An attacker could send malformed
364: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 365: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 366: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
367: access module, using IP addresses without a netmask on big endian
368: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 369: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 370: An IPv6 MTU handling problem exists that could be used by an
371: attacker to cause a denial of service attack.</a>
1.294 david 372: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 373: A reference counting bug in shmat(2) could be used to write to
374: kernel memory under certain circumstances.</a>
1.294 david 375: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 376: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 377: by Thomas Walpuski.</a>
1.294 david 378: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 379: It may be possible for a local user to execute arbitrary code
380: resulting in escalation of privileges due to a stack overrun
381: in compat_ibcs2(8).</a>
1.294 david 382: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 383: The use of certain ASN.1 encodings or malformed public keys may
384: allow an attacker to mount a denial of service attack against
385: applications linked with ssl(3).</a>
1.294 david 386: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 387: Access of freed memory in pf(4) could be used to
1.260 margarid 388: remotely panic a machine using scrub rules.</a>
1.294 david 389: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 390: A buffer overflow in the address parsing in
391: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 392: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 393: OpenSSH versions prior to 3.7 contains a buffer management error
394: that is potentially exploitable.</a>
1.294 david 395: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 396: Root may be able to reduce the security level by taking advantage of
397: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 398: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 399: An improper bounds check in the kernel may allow a local user
400: to panic the kernel.</a>
1.294 david 401: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 402: An off-by-one error exists in the C library function realpath(3)
403: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 404: </ul>
405:
1.265 miod 406:
1.247 david 407: <p>
1.246 deraadt 408: <li>
1.288 matthieu 409: <a name="32"></a>
1.224 deraadt 410:
1.294 david 411: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 412: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 413: in <a href="anoncvs.html">OpenBSD current</a>. The
414: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 415: you should update your machine.
1.224 deraadt 416: <p>
417: <ul>
1.294 david 418: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 419: The use of certain ASN.1 encodings or malformed public keys may
420: allow an attacker to mount a denial of service attack against
421: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 422: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 423: Access of freed memory in pf(4) could be used to
1.260 margarid 424: remotely panic a machine using scrub rules.</a>
1.294 david 425: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 426: A buffer overflow in the address parsing in
427: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 428: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 429: OpenSSH versions prior to 3.7 contains a buffer management error
430: that is potentially exploitable.</a>
1.294 david 431: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 432: Fix for a potential security issue in
433: sendmail(8) with respect to DNS maps.</a>
1.294 david 434: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 435: An off-by-one error exists in the C library function realpath(3)
436: may allow an attacker to gain escalated privileges.</a>
1.294 david 437: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 438: A buffer overflow in the address parsing in
439: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 440: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 441: A cryptographic weaknesses in the Kerberos v4 protocol can be
442: exploited on Kerberos v5 as well.</a>
1.294 david 443: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 444: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 445: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 446: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 447: Various SSL and TLS operations in OpenSSL are vulnerable to
448: timing attacks.</a>
1.294 david 449: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 450: A buffer overflow in lprm(1) may allow an attacker to elevate
451: privileges to user daemon.</a>.
1.294 david 452: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 453: A buffer overflow in the envelope comments processing in
454: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 455: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 456: httpd(8) leaks file inode numbers via ETag header as well as
457: child PIDs in multipart MIME boundary generation. This could
458: lead, for example, to NFS exploitation because it uses inode
459: numbers as part of the file handle.</a>
1.294 david 460: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 461: In ssl(8) an information leak can occur via timing by performing
462: a MAC computation even if incorrect block cipher padding has
463: been found, this is a countermeasure. Also, check for negative
464: sizes, in allocation routines.</a>
1.294 david 465: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 466: A double free exists in cvs(1) that could lead to privilege
467: escalation for cvs configurations where the cvs command is
1.233 margarid 468: run as a privileged user.</a>
1.294 david 469: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 470: A buffer overflow exists in named(8) that could lead to a
471: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 472: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 473: A logic error in the pool kernel memory allocator could cause
474: memory corruption in low-memory situations, causing the system
475: to crash.</a>
1.294 david 476: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 477: An attacker can bypass smrsh(8)'s restrictions and execute
478: arbitrary commands with the privileges of his own account.</a>
1.294 david 479: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 480: Network bridges running pf with scrubbing enabled could cause
481: mbuf corruption, causing the system to crash.</a>
1.294 david 482: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 483: A buffer overflow can occur in the kadmind(8) daemon, leading
484: to possible remote crash or exploit.</a>
1.224 deraadt 485: </ul>
486:
1.227 miod 487: <p>
488: <li>
1.288 matthieu 489: <a name="31"></a>
1.203 deraadt 490:
1.294 david 491: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 492: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 493: in <a href="anoncvs.html">OpenBSD current</a>. The
494: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 495: you should update your machine.
1.203 deraadt 496:
497: <p>
498: <ul>
1.294 david 499: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 500: A buffer overflow in the address parsing in
501: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 502: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 503: A cryptographic weaknesses in the Kerberos v4 protocol can be
504: exploited on Kerberos v5 as well.</a>
1.294 david 505: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 506: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 507: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 508: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 509: Various SSL and TLS operations in OpenSSL are vulnerable to
510: timing attacks.</a>
1.294 david 511: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 512: A buffer overflow in lprm(1) may allow an attacker to gain
513: root privileges.</a>
1.294 david 514: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 515: A buffer overflow in the envelope comments processing in
516: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 517: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 518: In ssl(8) an information leak can occur via timing by performing
519: a MAC computation even if incorrect block cipher padding has
520: been found, this is a countermeasure. Also, check for negative
521: sizes, in allocation routines.</a>
1.294 david 522: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 523: A double free exists in cvs(1) that could lead to privilege
524: escalation for cvs configurations where the cvs command is
1.294 david 525: run as a privileged user</a>.
526: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 527: A buffer overflow exists in named(8) that could lead to a
528: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 529: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 530: Incorrect argument checking in the getitimer(2) system call
531: may allow an attacker to crash the system.</a>
1.294 david 532: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 533: An attacker can bypass smrsh(8)'s restrictions and execute
534: arbitrary commands with the privileges of his own account.</a>
1.294 david 535: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 536: A buffer overflow can occur in the kadmind(8) daemon, leading
537: to possible remote crash or exploit.</a>
1.294 david 538: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 539: Incorrect argument checking in the setitimer(2) system call
540: may allow an attacker to write to kernel memory.</a>
1.294 david 541: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 542: An insufficient boundary check in the select system call
1.220 miod 543: allows an attacker to overwrite kernel memory and execute arbitrary code
544: in kernel context.</a>
1.294 david 545: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 546: Several remote buffer overflows can occur in the SSL2 server and SSL3
547: client of the ssl(8) library, as in the ASN.1 parser code in the
548: crypto(3) library, all of them being potentially remotely
549: exploitable.</a>
1.294 david 550: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 551: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
552: possible remote crash.</a>
1.294 david 553: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 554: A race condition exists in the pppd(8) daemon which may cause it to
555: alter the file permissions of an arbitrary file.</a>
1.294 david 556: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 557: Receiving IKE payloads out of sequence can cause isakmpd(8) to
558: crash.</a>
1.294 david 559: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 560: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 561: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 562: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 563: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 564: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 565: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 566: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 567: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 568: input validation error that can result in an integer overflow and
569: privilege escalation.</a>
1.294 david 570: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 571: A buffer overflow can occur during the interpretation of chunked
572: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 573: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 574: Under certain conditions, on systems using YP with netgroups
575: in the password database, it is possible that sshd(8) does
576: ACL checks for the requested user name but uses the password
577: database entry of a different user for authentication. This
578: means that denied users might authenticate successfully
579: while permitted users could be locked out.</a>
1.294 david 580: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 581: A race condition exists that could defeat the kernel's
582: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 583: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 584: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 585: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 586: A local user can gain super-user privileges due to a buffer
587: overflow in sshd(8) if AFS has been configured on the system
588: or if KerberosTgtPassing or AFSTokenPassing has been enabled
589: in the sshd_config file.</a>
1.203 deraadt 590: </ul>
591:
1.235 miod 592: <p>
1.203 deraadt 593: <li>
1.288 matthieu 594: <a name="30"></a>
1.187 deraadt 595:
1.294 david 596: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 597: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 598: in <a href="anoncvs.html">OpenBSD current</a>. The
599: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 600: you should update your machine.
1.187 deraadt 601:
602: <p>
603: <ul>
1.294 david 604: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 605: A buffer overflow exists in named(8) that could lead to a
606: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 607: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 608: Incorrect argument checking in the getitimer(2) system call
609: may allow an attacker to crash the system.</a>
1.294 david 610: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 611: An attacker can bypass smrsh(8)'s restrictions and execute
612: arbitrary commands with the privileges of his own account.</a>
1.294 david 613: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 614: A buffer overflow can occur in the kadmind(8) daemon, leading
615: to possible remote crash or exploit.</a>
1.294 david 616: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 617: Incorrect argument checking in the setitimer(2) system call
618: may allow an attacker to write to kernel memory.</a>
1.294 david 619: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 620: An insufficient boundary check in the select and poll system calls
621: allows an attacker to overwrite kernel memory and execute arbitrary code
622: in kernel context.</a>
1.294 david 623: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 624: Several remote buffer overflows can occur in the SSL2 server and SSL3
625: client of the ssl(8) library, as in the ASN.1 parser code in the
626: crypto(3) library, all of them being potentially remotely
627: exploitable.</a>
1.294 david 628: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 629: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
630: possible remote crash.</a>
1.294 david 631: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 632: A race condition exists in the pppd(8) daemon which may cause it to
633: alter the file permissions of an arbitrary file.</a>
1.294 david 634: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 635: Receiving IKE payloads out of sequence can cause isakmpd(8) to
636: crash.</a>
1.294 david 637: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 638: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 639: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 640: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 641: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 642: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 643: input validation error that can result in an integer overflow and
644: privilege escalation.</a>
1.294 david 645: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 646: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 647: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 648: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 649: A buffer overflow can occur during the interpretation of chunked
650: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 651: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 652: A race condition exists that could defeat the kernel's
653: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 654: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 655: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 656: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 657: A local user can gain super-user privileges due to a buffer
658: overflow in sshd(8) if AFS has been configured on the system
659: or if KerberosTgtPassing or AFSTokenPassing has been enabled
660: in the sshd_config file.</a>
1.294 david 661: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 662: The mail(1) was interpreting tilde escapes even when invoked
663: in non-interactive mode. As mail(1) is called as root from cron,
664: this can lead to a local root compromise.</a>
1.294 david 665: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 666: Under certain conditions, on systems using YP with netgroups in
667: the password database, it is possible for the rexecd(8) and rshd(8)
668: daemons to execute a shell from a password database entry for a
669: different user. Similarly, atrun(8) may change to the wrong
670: home directory when running jobs.</a>
1.294 david 671: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 672: A potential double free() exists in the zlib library;
673: this is not exploitable on OpenBSD.
674: The kernel also contains a copy of zlib; it is not
675: currently known if the kernel zlib is exploitable.</a>
1.294 david 676: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 677: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 678: may allow a local user to gain super-user privileges.</a>
1.294 david 679: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 680: A race condition between the ptrace(2) and execve(2) system calls
681: allows an attacker to modify the memory contents of suid/sgid
682: processes which could lead to compromise of the super-user account.</a>
1.294 david 683: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 684: There is a security hole in sudo(8) that can be exploited
685: when the Postfix sendmail replacement is installed that may
686: allow an attacker on the local host to gain root privileges.</a>
1.294 david 687: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 688: An attacker can trick a machine running the lpd daemon into
689: creating new files in the root directory from a machine with
690: remote line printer access.</a>
1.294 david 691: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 692: The vi.recover script can be abused in such a way as
693: to cause arbitrary zero-length files to be removed.</a>
1.294 david 694: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 695: pf(4) was incapable of dealing with certain ipv6 icmp packets,
696: resulting in a crash.</a>
1.294 david 697: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 698: A security hole that may allow an attacker to partially authenticate
699: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 700: </ul>
701:
702: <p>
703: <li>
1.288 matthieu 704: <a name="29"></a>
1.173 deraadt 705:
1.294 david 706: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 707: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 708: in <a href="anoncvs.html">OpenBSD current</a>. The
709: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 710: you should update your machine.
711:
1.173 deraadt 712:
713: <p>
714: <ul>
1.294 david 715: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 716: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 717: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 718: A race condition exists that could defeat the kernel's
719: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 720: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 721: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 722: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 723: A local user can gain super-user privileges due to a buffer
724: overflow in sshd(8) if AFS has been configured on the system
725: or if KerberosTgtPassing or AFSTokenPassing has been enabled
726: in the sshd_config file.</a>
1.294 david 727: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 728: The mail(1) was interpreting tilde escapes even when invoked
729: in non-interactive mode. As mail(1) is called as root from cron,
730: this can lead to a local root compromise.</a>
1.294 david 731: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 732: A potential double free() exists in the zlib library;
733: this is not exploitable on OpenBSD.
734: The kernel also contains a copy of zlib; it is not
735: currently known if the kernel zlib is exploitable.</a>
1.294 david 736: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 737: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 738: may allow a local user to gain super-user privileges.</a>
1.294 david 739: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 740: A race condition between the ptrace(2) and execve(2) system calls
741: allows an attacker to modify the memory contents of suid/sgid
742: processes which could lead to compromise of the super-user account.</a>
1.294 david 743: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 744: There is a security hole in sudo(8) that can be exploited
745: when the Postfix sendmail replacement is installed that may
746: allow an attacker on the local host to gain root privileges.</a>
1.294 david 747: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 748: An attacker can trick a machine running the lpd daemon into
749: creating new files in the root directory from a machine with
750: remote line printer access.</a>
1.294 david 751: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 752: The vi.recover script can be abused in such a way as
753: to cause arbitrary zero-length files to be removed.</a>
1.294 david 754: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 755: A security hole exists in uuxqt(8) that may allow an
756: attacker to gain root privileges.</a>
1.294 david 757: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 758: A security hole exists in lpd(8) that may allow an
759: attacker to gain root privileges if lpd is running.</a>
1.294 david 760: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 761: A security hole exists in sendmail(8) that may allow an
762: attacker on the local host to gain root privileges.</a>
1.294 david 763: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 764: A kernel buffer overflow in the NFS code can be used to execute
765: arbitrary code by users with mount privileges (only root by
1.181 millert 766: default).</a>
1.294 david 767: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 768: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 769: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 770: sshd(8) allows users to delete arbitrary files named "cookies"
771: if X11 forwarding is enabled. X11 forwarding is disabled
772: by default.</a>
1.294 david 773: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 774: Programs using the fts routines can be tricked into changing
775: into the wrong directory.</a>
1.294 david 776: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 777: Sendmail signal handlers contain unsafe code,
778: leading to numerous race conditions.</a>
1.173 deraadt 779: </ul>
780:
781: <p>
782: <li>
1.288 matthieu 783: <a name="28"></a>
1.152 deraadt 784:
1.294 david 785: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 786: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 787: in <a href="anoncvs.html">OpenBSD current</a>. The
788: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 789: you should update your machine.
790:
1.152 deraadt 791:
792: <p>
793: <ul>
1.294 david 794: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 795: A security hole exists in uuxqt(8) that may allow an
796: attacker to gain root privileges.</a>
1.294 david 797: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 798: A security hole exists in lpd(8) that may allow an
799: attacker to gain root privileges if lpd is running.</a>
1.294 david 800: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 801: A security hole exists in sendmail(8) that may allow an
802: attacker on the local host to gain root privileges.</a>
1.294 david 803: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 804: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 805: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 806: Programs using the fts routines can be tricked into changing
807: into the wrong directory.</a>
1.294 david 808: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 809: Sendmail signal handlers contain unsafe code,
810: leading to numerous race conditions.</a>
1.294 david 811: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 812: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 813: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 814: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 815: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 816: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 817: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 818: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 819: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 820: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 821: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 822: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 823: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 824: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 825: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 826: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 827: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 828: rnd(4) did not use all of its input when written to.</a>
1.294 david 829: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 830: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 831: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 832: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 833: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 834: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 835: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 836: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 837: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 838: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 839: </ul>
840:
841: <p>
842: <li>
1.288 matthieu 843: <a name="27"></a>
1.124 deraadt 844:
1.294 david 845: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 846: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 847: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 848: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
849:
850: <p>
851: <ul>
1.294 david 852: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 853: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 854: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 855: a buffer overflow was fixed in sudo(8).</a>
1.294 david 856: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 857: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 858: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 859: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
860: (patch included)</a>
1.294 david 861: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 862: X11 libraries have 2 potential overflows in xtrans code.
863: (patch included)</a>
1.294 david 864: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 865: Apache mod_rewrite and mod_vhost_alias modules could expose files
866: on the server in certain configurations if used.
867: (patch included)</a>
1.294 david 868: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 869: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
870: TERMPATH and TERMCAP environment variables as it should.
871: (patch included)</a>
1.294 david 872: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 873: There are printf-style format string bugs in several privileged
874: programs. (patch included)</a>
1.294 david 875: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 876: libcurses honored terminal descriptions in the $HOME/.terminfo
877: directory as well as in the TERMCAP environment variable for
878: setuid and setgid applications.
1.146 deraadt 879: (patch included)</a>
1.294 david 880: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 881: A format string vulnerability exists in talkd(8).
882: (patch included)</a>
1.294 david 883: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 884: A format string vulnerability exists in the pw_error() function of the
885: libutil library, yielding localhost root through chpass(1).
886: (patch included)</a>
1.294 david 887: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 888: Bad ESP/AH packets could cause a crash under certain conditions.
889: (patch included)</a>
1.294 david 890: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 891: A format string vulnerability (localhost root) exists in xlock(1).
892: (patch included)</a>
1.294 david 893: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 894: Various bugs found in X11 libraries have various side effects, almost
895: completely denial of service in OpenBSD.
896: (patch included)</a>
1.294 david 897: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 898: Just like pretty much all the other unix ftp daemons
899: on the planet, ftpd had a remote root hole in it.
900: Luckily, ftpd was not enabled by default.
1.137 deraadt 901: The problem exists if anonymous ftp is enabled.
1.136 deraadt 902: (patch included)</a>
1.294 david 903: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 904: Mopd, very rarely used, contained some buffer overflows.
905: (patch included)</a>
1.294 david 906: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 907: libedit would check for a <b>.editrc</b> file in the current
908: directory. Not known to be a real security issue, but a patch
909: is available anyways.
910: (patch included)</a>
1.294 david 911: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 912: A serious bug in dhclient(8) could allow strings from a
913: malicious dhcp server to be executed in the shell as root.
914: (patch included)</a>
1.294 david 915: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 916: A serious bug in isakmpd(8) policy handling wherein
917: policy verification could be completely bypassed in isakmpd.
918: (patch included)</a>
1.294 david 919: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 920: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
921: should not be used, and results in security problems on
922: other operating systems.</a>
1.294 david 923: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 924: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 925: (patch included)</a>
1.294 david 926: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 927: Improper use of ipf <i>keep-state</i> rules can result
928: in firewall rules being bypassed. (patch included)</a>
929:
1.124 deraadt 930: </ul>
931:
932: <p>
933: <li>
1.288 matthieu 934: <a name="26"></a>
1.119 deraadt 935:
1.294 david 936: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 937: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 938: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 939: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
940:
941: <p>
942: <ul>
1.294 david 943: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 944: SYSV semaphore support contained an undocumented system call
1.131 deraadt 945: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 946: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 947: Improper use of ipf <i>keep-state</i> rules can result
948: in firewall rules being bypassed. (patch included)</a>
1.294 david 949: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 950: xlockmore has a bug which a localhost attacker can use to gain
951: access to the encrypted root password hash (which is normally
1.245 miod 952: encoded using blowfish</a> (see
1.294 david 953: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 954: crypt(3)</a>)
1.245 miod 955: (patch included).
1.294 david 956: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 957: Systems running with procfs enabled and mounted are
958: vulnerable to a very tricky exploit. procfs is not
959: mounted by default.
960: (patch included).</a>
1.294 david 961: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 962: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 963: thus exposing the system to a race where the aliases file
964: did not exist.
1.119 deraadt 965: (patch included).</a>
1.294 david 966: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 967: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 968: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 969: A buffer overflow in the RSAREF code included in the
970: USA version of libssl, is possibly exploitable in
971: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 972: (patch included).<br></a>
973: <strong>Update:</strong> Turns out that this was not exploitable
974: in any of the software included in OpenBSD 2.6.
1.294 david 975: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 976: Any user could change interface media configurations, resulting in
977: a localhost denial of service attack.
1.121 deraadt 978: (patch included).</a>
1.119 deraadt 979: </ul>
980:
981: <p>
982: <li>
1.288 matthieu 983: <a name="25"></a>
1.106 deraadt 984:
1.294 david 985: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 986: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 987: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 988: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
989:
1.96 deraadt 990: <p>
1.104 deraadt 991: <ul>
1.294 david 992: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 993: In cron(8), make sure argv[] is NULL terminated in the
994: fake popen() and run sendmail as the user, not as root.
995: (patch included).</a>
1.294 david 996: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 997: filesystems had an overrun in their handling of uio_offset
998: in their readdir() routines. (These filesystems are not
999: enabled by default). (patch included).</a>
1.294 david 1000: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1001: when we execve() a new process. (patch included).</a>
1.294 david 1002: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1003: been handled by IPsec may be transmitted as cleartext.
1004: PF_KEY SA expirations may leak kernel resources.
1005: (patch included).</a>
1.294 david 1006: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1007: motd re-writing and change the find(1) to use -execdir
1008: (patch included).</a>
1.294 david 1009: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1010: users to chflags(2) or fchflags(2) on character or block devices
1011: which they may currently be the owner of (patch included).</a>
1.294 david 1012: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1013: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1014: </ul>
1015:
1.106 deraadt 1016: <p>
1017: <li>
1.288 matthieu 1018: <a name="24"></a>
1.235 miod 1019:
1.294 david 1020: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1021: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1022: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1023: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1024:
1.96 deraadt 1025: <p>
1.75 deraadt 1026: <ul>
1.294 david 1027: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1028: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1029: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1030: another kernel crash case caused by the <strong>crashme</strong>
1031: program (patch included).</a>
1.294 david 1032: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1033: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1034: (patch included).</a>
1.294 david 1035: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1036: existed in ping(8). (patch included).</a>
1.294 david 1037: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1038: the ipq, which could permit an attacker to cause a crash.
1039: (patch included).</a>
1.294 david 1040: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1041: kernel between accept(2) and select(2) could permit an attacker
1042: to hang sockets from remote.
1043: (patch included).</a>
1.294 david 1044: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1045: bog the machine excessively and cause problems.
1046: (patch included).</a>
1.294 david 1047: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1048: DDB interacted to possibly cause a crash.
1049: (patch included).</a>
1.294 david 1050: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1051: (patch included).</a>
1.294 david 1052: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1053: problem in bootpd(8). (patch included).</a>
1.294 david 1054: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1055: exploitable problem relating to environment variables in termcap
1056: and curses. (patch included).</a>
1.294 david 1057: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1058: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1059: </ul>
1060:
1.106 deraadt 1061: <p>
1062: <li>
1.288 matthieu 1063: <a name="23"></a>
1.235 miod 1064:
1.294 david 1065: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1066: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1067: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1068: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1069:
1.96 deraadt 1070: <p>
1.53 matthieu 1071: <ul>
1.294 david 1072: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1073: problem in bootpd(8). (patch included).</a>
1.294 david 1074: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1075: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1076: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1077: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1078: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1079: chpass(1) has a file descriptor leak which allows an
1080: attacker to modify /etc/master.passwd.</a>
1.294 david 1081: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1082: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1083: should not be executed with fd slots 0, 1, or 2 free.
1084: (patch included).</a>
1.294 david 1085: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1086: libraries (patches included).</a>
1.294 david 1087: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1088: processes too permissive (4th revision patch included).</a>
1.294 david 1089: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1090: of immutable and append-only file flags. (patch included).</a>
1.294 david 1091: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1092: if IPSEC is enabled (patch included).</a>
1.294 david 1093: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1094: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1095: </ul>
1.9 deraadt 1096:
1.106 deraadt 1097: <p>
1098: <li>
1.288 matthieu 1099: <a name="22"></a>
1.235 miod 1100:
1.294 david 1101: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1102: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1103: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1104: still exist in other operating systems. (The supplied patches are for
1105: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1106:
1.96 deraadt 1107: <p>
1.9 deraadt 1108: <ul>
1.294 david 1109: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1110: packets if IPSEC is enabled (patch included).</a>
1.294 david 1111: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1112: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1113: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1114: (patch included).</a>
1.294 david 1115: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1116: (patch included).</a>
1.294 david 1117: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1118: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1119: (patch included).</a>
1.294 david 1120: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1121: export (patch included).</a>
1.112 philen 1122: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1123: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1124: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1125: Acceptance.</a>
1.294 david 1126: A patch is available <a href="errata22.html#sourceroute">here</a>.
1127: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1128: flaw (patch included).</a>
1.294 david 1129: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1130: </ul>
1131:
1.106 deraadt 1132: <p>
1133: <li>
1.288 matthieu 1134: <a name="21"></a>
1.235 miod 1135:
1.294 david 1136: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1137: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1138: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1139: exist in other operating systems. (If you are running OpenBSD 2.1, we
1140: would strongly recommend an upgrade to the newest release, as this
1141: patch list only attempts at fixing the most important security
1142: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1143: security problems. Many of those problems were solved in ways which
1144: make it hard for us to provide patches).
1145:
1.96 deraadt 1146: <p>
1.52 deraadt 1147: <ul>
1.112 philen 1148: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1149: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1150: (patch included)</a>
1.112 philen 1151: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1152: </ul>
1.51 deraadt 1153:
1.106 deraadt 1154: <p>
1155: <li>
1.288 matthieu 1156: <a name="20"></a>
1.235 miod 1157:
1.294 david 1158: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1159: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1160: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1161: exist in other operating systems. (If you are running OpenBSD 2.0, we
1162: commend you for being there back in the old days!, but you're really
1163: missing out if you don't install a new version!)
1164:
1165: <p>
1166: <ul>
1.112 philen 1167: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1168: resolver (patch included)</a>
1169: <li>Many others... if people can hunt them down, please let me know
1170: and we'll put them up here.
1171: </ul>
1.51 deraadt 1172: <p>
1.106 deraadt 1173:
1.288 matthieu 1174: <a name="watching"></a>
1.294 david 1175: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1176:
1.21 deraadt 1177: Since we take a proactive stance with security, we are continually
1178: finding and fixing new security problems. Not all of these problems
1.80 espie 1179: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1180: confirmed to be exploitable; many simple bugs we fix do turn out to
1181: have security consequences we could not predict. We do not have the
1182: time resources to make these changes available in the above format.<p>
1.21 deraadt 1183:
1184: Thus there are usually minor security fixes in the current source code
1185: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1186: guarantee that these problems are of minimal impact and unproven
1.44 ian 1187: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1188: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1189:
1.45 deraadt 1190: People who are really concerned with security can do a number of
1191: things:<p>
1.21 deraadt 1192:
1193: <ul>
1194: <li>If you understand security issues, watch our
1.294 david 1195: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1196: eye out for things which appear security related. Since
1.21 deraadt 1197: exploitability is not proven for many of the fixes we make,
1198: do not expect the relevant commit message to say "SECURITY FIX!".
1199: If a problem is proven and serious, a patch will be available
1200: here very shortly after.
1.161 horacio 1201: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1202: security-announce mailing list</a> which will notify you for every
1.186 ian 1203: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1204: and instruct you on how to patch the problem.
1.21 deraadt 1205: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1206: complete system build from time to time (read /usr/src/Makefile
1207: carefully). Users can make the assumption that the current
1208: source tree always has stronger security than the previous release.
1.45 deraadt 1209: However, building your own system from source code is not trivial;
1.265 miod 1210: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1211: transition between major releases.
1.115 ericj 1212: <li>Install a binary snapshot for your
1.80 espie 1213: architecture, which are made available fairly often. For
1.29 deraadt 1214: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1215: </ul>
1216:
1.9 deraadt 1217: <p>
1.288 matthieu 1218: <a name="reporting"></a>
1.294 david 1219: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1220:
1.5 deraadt 1221: <p> If you find a new security problem, you can mail it to
1.294 david 1222: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1223: <br>
1.5 deraadt 1224: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1225: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1226:
1.107 deraadt 1227: <p>
1.288 matthieu 1228: <a name="papers"></a>
1.294 david 1229: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1230:
1231: A number of papers have been written by OpenBSD team members, about security
1232: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1233: documents are available as follows.<p>
1.107 deraadt 1234:
1235: <ul>
1.113 deraadt 1236: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1237: <a href="events.html#usenix99">Usenix 1999</a>,
1238: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1239: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1240: <a href="papers/bcrypt-paper.ps">paper</a> and
1241: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1242: <p>
1243: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1244: <a href="events.html#usenix99">Usenix 1999</a>,
1245: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1246: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1247: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1248: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1249: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1250: <a href="papers/crypt-paper.ps">paper</a> and
1251: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1252: <p>
1253: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1254: <a href="events.html#usenix99">Usenix 1999</a>,
1255: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1256: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1257: <a href="papers/strlcpy-paper.ps">paper</a> and
1258: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1259: <p>
1.118 deraadt 1260: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1261: <a href="events.html#lisa99">LISA 1999</a>,
1262: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1263: <a href="papers/authgw-paper.ps">paper</a> and
1264: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1265: <p>
1.153 jufi 1266: <li>Encrypting Virtual Memory<br>
1.294 david 1267: <a href="events.html#sec2000">Usenix Security 2000</a>,
1268: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1269: <a href="papers/swapencrypt.ps">paper</a> and
1270: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1271: <p>
1.107 deraadt 1272: </ul>
1.294 david 1273: </ul>
1.106 deraadt 1274:
1.2 deraadt 1275: <hr>
1.294 david 1276: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1277: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1278: <br>
1.299 ! millert 1279: <small>$OpenBSD: security.html,v 1.298 2004/09/16 23:09:48 brad Exp $</small>
1.1 deraadt 1280:
1.24 deraadt 1281: </body>
1282: </html>
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