Annotation of www/security.html, Revision 1.360
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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.280 david 57: <a href="#34">3.4</a>,
1.301 miod 58: <a href="#35">3.5</a>,
1.312 david 59: <a href="#36">3.6</a>,
1.318 deraadt 60: <a href="#37">3.7</a>,
1.321 brad 61: <a href="#38">3.8</a>,
1.334 brad 62: <a href="#39">3.9</a>,
1.348 merdely 63: <a href="#40">4.0</a>,
64: <a href="#41">4.1</a>,
1.357 brad 65: <a href="#42">4.2</a>,
66: <a href="#43">4.3</a>.
1.114 philen 67: </td>
68: </tr>
69: </table>
1.56 deraadt 70: <hr>
71:
1.294 david 72: <a name="goals"></a>
1.278 deraadt 73: <ul>
1.294 david 74: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 75:
1.14 deraadt 76: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 77: ONE in the industry for security (if we are not already there). Our
78: open software development model permits us to take a more
79: uncompromising view towards increased security than Sun, SGI, IBM, HP,
80: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 81: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 82: cryptography</a>, we are able to take cryptographic approaches towards
83: fixing security problems.<p>
1.18 deraadt 84:
1.288 matthieu 85: <a name="disclosure"></a>
1.294 david 86: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 87:
1.45 deraadt 88: Like many readers of the
1.196 jufi 89: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 90: BUGTRAQ mailing list</a>,
1.106 deraadt 91: we believe in full disclosure of security problems. In the
92: operating system arena, we were probably the first to embrace
93: the concept. Many vendors, even of free software, still try
94: to hide issues from their users.<p>
95:
96: Security information moves very fast in cracker circles. On the other
97: hand, our experience is that coding and releasing of proper security
98: fixes typically requires about an hour of work -- very fast fix
99: turnaround is possible. Thus we think that full disclosure helps the
100: people who really care about security.<p>
101:
1.288 matthieu 102: <a name="process"></a>
1.294 david 103: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 104:
1.12 deraadt 105: Our security auditing team typically has between six and twelve
1.45 deraadt 106: members who continue to search for and fix new security holes. We
107: have been auditing since the summer of 1996. The process we follow to
108: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 109: every critical software component. We are not so much looking for
110: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 111: years later someone discovers the problem used to be a security
1.106 deraadt 112: issue, and we fixed it because it was just a bug, well, all the
113: better. Flaws have been found in just about every area of the system.
114: Entire new classes of security problems have been found during our
115: audit, and often source code which had been audited earlier needs
116: re-auditing with these new flaws in mind. Code often gets audited
117: multiple times, and by multiple people with different auditing
118: skills.<p>
1.12 deraadt 119:
1.94 deraadt 120: Some members of our security auditing team worked for Secure Networks,
121: the company that made the industry's premier network security scanning
122: software package Ballista (Secure Networks got purchased by Network
123: Associates, Ballista got renamed to Cybercop Scanner, and well...)
124: That company did a lot of security research, and thus fit in well
1.106 deraadt 125: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
126: colours since day 1.<p>
1.31 deraadt 127:
1.34 deraadt 128: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 129: In most cases we have found that the determination of exploitability
130: is not an issue. During our ongoing auditing process we find many
131: bugs, and endeavor to fix them even though exploitability is not
132: proven. We fix the bug, and we move on to find other bugs to fix. We
133: have fixed many simple and obvious careless programming errors in code
134: and only months later discovered that the problems were in fact
135: exploitable. (Or, more likely someone on
1.197 jufi 136: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 137: would report that other operating systems were vulnerable to a `newly
138: discovered problem', and then it would be discovered that OpenBSD had
139: been fixed in a previous release). In other cases we have been saved
140: from full exploitability of complex step-by-step attacks because we
141: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 142: managed such a success is the lpd advisory that Secure Networks put out.
143: <p>
1.29 deraadt 144:
1.288 matthieu 145: <a name="newtech"></a>
1.294 david 146: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 147:
148: As we audit source code, we often invent new ways of solving problems.
149: Sometimes these ideas have been used before in some random application
150: written somewhere, but perhaps not taken to the degree that we do.
151: <p>
152:
153: <ul>
154: <li>strlcpy() and strlcat()
155: <li>Memory protection purify
156: <ul>
157: <li>W^X
158: <li>.rodata segment
159: <li>Guard pages
160: <li>Randomized malloc()
161: <li>Randomized mmap()
162: <li>atexit() and stdio protection
163: </ul>
1.295 otto 164: <li>Privilege separation
1.278 deraadt 165: <li>Privilege revocation
166: <li>Chroot jailing
167: <li>New uids
168: <li>ProPolice
169: <li>... and others
170: </ul>
171: <p>
172:
1.294 david 173: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 174:
1.45 deraadt 175: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 176: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 177: commonplace in security forums like
1.197 jufi 178: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 179:
1.45 deraadt 180: The most intense part of our security auditing happened immediately
1.80 espie 181: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 182: over the last third of 1996 and first half of 1997. Thousands (yes,
183: thousands) of security issues were fixed rapidly over this year-long
184: period; bugs like the standard buffer overflows, protocol
185: implementation weaknesses, information gathering, and filesystem
186: races. Hence most of the security problems that we encountered were
187: fixed before our 2.1 release, and then a far smaller number needed
188: fixing for our 2.2 release. We do not find as many problems anymore,
189: it is simply a case of diminishing returns. Recently the security
190: problems we find and fix tend to be significantly more obscure or
191: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 192:
1.35 deraadt 193: <ul>
1.45 deraadt 194: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 195: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 196: to search for more complicated exploits, so we will too.
197: <li>Finding and fixing subtle flaws in complicated software is
198: a lot of fun.
1.35 deraadt 199: </ul>
1.106 deraadt 200: <p>
1.15 deraadt 201:
1.14 deraadt 202: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 203: to find and fix new security flaws.<p>
1.12 deraadt 204:
1.288 matthieu 205: <a name="default"></a>
1.294 david 206: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 207:
208: To ensure that novice users of OpenBSD do not need to become security
209: experts overnight (a viewpoint which other vendors seem to have), we
210: ship the operating system in a Secure by Default mode. All non-essential
211: services are disabled. As the user/administrator becomes more familiar
212: with the system, he will discover that he has to enable daemons and other
213: parts of the system. During the process of learning how to enable a new
214: service, the novice is more likely to learn of security considerations.<p>
215:
216: This is in stark contrast to the increasing number of systems that
217: ship with NFS, mountd, web servers, and various other services enabled
218: by default, creating instantaneous security problems for their users
219: within minutes after their first install.<p>
220:
1.288 matthieu 221: <a name="crypto"></a>
1.294 david 222: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 223:
224: And of course, since the OpenBSD project is based in Canada, it is possible
225: for us to integrate cryptography. For more information, read the page
1.116 deraadt 226: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 227:
1.294 david 228: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 229:
230: <li>
1.357 brad 231: <a name="43"></a>
232:
233: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
234: These are the OpenBSD 4.3 advisories -- all these problems are solved
235: in <a href=anoncvs.html>OpenBSD current</a> and the
236: <a href=stable.html>patch branch</a>.
237:
238: <p>
239: <ul>
1.359 brad 240: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 ! tobias 241: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 242: <li><a href="errata43.html#001_openssh">March 30, 2008:
243: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 244: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 245: </ul>
246:
247:
248: <li>
1.348 merdely 249: <a name="42"></a>
250:
251: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
252: These are the OpenBSD 4.2 advisories -- all these problems are solved
253: in <a href=anoncvs.html>OpenBSD current</a> and the
254: <a href=stable.html>patch branch</a>.
255:
256: <p>
257: <ul>
1.359 brad 258: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 ! tobias 259: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 260: <li><a href="errata42.html#010_openssh">March 30, 2008:
261: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 262: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 263: <li><a href="errata42.html#009_ppp">March 7, 2008:
264: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 265: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
266: Multiple vulnerabilities in X.Org.</a>
1.352 henning 267: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
268: A missing NULL pointer check can lead to a kernel panic.</a>
269: <li><a href="errata42.html#004_pf">Nov 27, 2007:
270: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 271: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
272: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 273: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 274: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 275: </ul>
276:
277: <li>
1.346 matthieu 278: <a name="41"></a>
279:
280: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
281: These are the OpenBSD 4.1 advisories -- all these problems are solved
282: in <a href=anoncvs.html>OpenBSD current</a> and the
283: <a href=stable.html>patch branch</a>.
284:
285: <p>
286: <ul>
1.359 brad 287: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 ! tobias 288: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 289: <li><a href="errata41.html#015_openssh">March 30, 2008:
290: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 291: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 292: <li><a href="errata41.html#014_ppp">March 7, 2008:
293: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 294: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
295: Multiple vulnerabilities in X.Org.</a>
296: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
297: The SSL_get_shared_ciphers() function in OpenSSL contains
298: an off-by-one overflow.</a>
1.350 deraadt 299: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 300: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 301: <li><a href="errata41.html#009_file">Jul 9, 2007:
302: Fix possible heap overflow in file(1).</a>
1.346 matthieu 303: <li><a href="errata41.html#005_route6">Apr 27, 2007:
304: IPv6 type 0 route headers can be used to mount a DoS attack
305: against hosts and networks.</a>
306: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
307: Multiple vulnerabilities in X.Org.</a>
308: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
309: Incorrect mbuf handling for ICMP6 packets.</a>
310: </ul>
311:
1.355 miod 312: <p>
313: OpenBSD 4.0 and earlier releases are not supported anymore. The following
314: paragraphs only list advisories issued while they were maintained; these
315: releases are likely to be affected by the advisories for more recent releases.
316: <br>
317:
1.346 matthieu 318: <li>
1.334 brad 319: <a name="40"></a>
320: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
321: These are the OpenBSD 4.0 advisories -- all these problems are solved
322: in <a href=anoncvs.html>OpenBSD current</a> and the
323: <a href=stable.html>patch branch</a>.
324:
325: <p>
326: <ul>
1.350 deraadt 327: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 328: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 329: <li><a href="errata40.html#015_file">Jul 9, 2007:
330: Fix possible heap overflow in file(1).</a>
1.343 deraadt 331: <li><a href="errata40.html#012_route6">Apr 23, 2007:
332: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 333: against hosts and networks.</a>
1.342 mbalmer 334: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
335: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 336: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
337: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 338: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 339: Insufficient validation in vga(4) may allow an attacker to gain
340: root privileges on some i386 systems.</a>
1.339 deraadt 341: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 342: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 343: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 344: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
345: found by Chris Evans.</a>
1.339 deraadt 346: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 347: Several problems have been found in OpenSSL.</a>
1.339 deraadt 348: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 349: httpd(8) does not sanitize the Expect header from an HTTP request
350: when it is reflected back in an error message, which might allow
351: cross-site scripting (XSS) style attacks.</a>
352: </ul>
353:
354: <li>
1.321 brad 355: <a name="39"></a>
356:
357: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
358: These are the OpenBSD 3.9 advisories -- all these problems are solved
359: in <a href=anoncvs.html>OpenBSD current</a> and the
360: <a href=stable.html>patch branch</a>.
361:
362: <p>
363: <ul>
1.343 deraadt 364: <li><a href="errata39.html#022_route6">Apr 23, 2007:
365: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 366: against hosts and networks.</a>
1.342 mbalmer 367: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
368: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 369: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
370: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 371: <li><a href="errata39.html#agp">Jan 3, 2007:
372: Insufficient validation in vga(4) may allow an attacker to gain
373: root privileges on some i386 systems.</a>
1.336 brad 374: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 375: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 376: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 377: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 378: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 379: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 380: found by Chris Evans.</a>
1.333 deraadt 381: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 382: Several problems have been found in OpenSSL.</a>
1.333 deraadt 383: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 384: httpd(8) does not sanitize the Expect header from an HTTP request
385: when it is reflected back in an error message, which might allow
386: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 387: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 388: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
389: possible for an attacker to construct an invalid signature which
390: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 391: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 392: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 393: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 394: Due to the failure to correctly validate LCP configuration option
395: lengths, it is possible for an attacker to send LCP packets via an
396: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 397: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 398: A problem in isakmpd(8) caused IPsec to run partly without replay
399: protection.</a>
1.333 deraadt 400: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 401: It is possible to cause the kernel to panic when more than the default
402: number of sempahores have been allocated.</a>
1.333 deraadt 403: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 404: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
405: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
406: option.</a>
1.333 deraadt 407: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 408: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 409: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 410: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
411: overflow.</a>
1.333 deraadt 412: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 413: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 414: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 415: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 416: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 417: A race condition has been reported to exist in the handling by sendmail
418: of asynchronous signals.</a>
419: </ul>
420:
421: <li>
1.318 deraadt 422: <a name="38"></a>
423:
424: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
425: These are the OpenBSD 3.8 advisories -- all these problems are solved
426: in <a href=anoncvs.html>OpenBSD current</a> and the
427: <a href=stable.html>patch branch</a>.
428:
429: <p>
430: <ul>
1.332 brad 431: <li><a href="errata38.html#ssh2">Oct 12, 2006:
432: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 433: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 434: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 435: found by Chris Evans.</a>
436: <li><a href="errata38.html#openssl2">Oct 7, 2006:
437: Several problems have been found in OpenSSL.</a>
438: <li><a href="errata38.html#httpd2">Oct 7, 2006:
439: httpd(8) does not sanitize the Expect header from an HTTP request
440: when it is reflected back in an error message, which might allow
441: cross-site scripting (XSS) style attacks.</a>
1.329 brad 442: <li><a href="errata38.html#openssl">Sep 8, 2006:
443: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
444: possible for an attacker to construct an invalid signature which
445: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 446: <li><a href="errata38.html#bind">Sep 8, 2006:
447: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 448: <li><a href="errata38.html#sppp">Sep 2, 2006:
449: Due to the failure to correctly validate LCP configuration option
450: lengths, it is possible for an attacker to send LCP packets via an
451: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 452: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
453: A problem in isakmpd(8) caused IPsec to run partly without replay
454: protection.</a>
455: <li><a href="errata38.html#sem">Aug 25, 2006:
456: It is possible to cause the kernel to panic when more than the default
457: number of sempahores have been allocated.</a>
458: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
459: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
460: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
461: option.</a>
462: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
463: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 464: <li><a href="errata38.html#httpd">Jul 30, 2006:
465: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
466: overflow.</a>
1.324 brad 467: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
468: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 469: <li><a href="errata38.html#xorg">May 2, 2006:
470: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 471: <li><a href="errata38.html#sendmail">Mar 25, 2006:
472: A race condition has been reported to exist in the handling by sendmail
473: of asynchronous signals.</a>
474: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 475: Josh Bressers has reported a weakness in OpenSSH caused due to the
476: insecure use of the system(3) function in scp(1) when performing copy
477: operations using filenames that are supplied by the user from the
478: command line.</a>
1.321 brad 479: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 480: Do not allow users to trick suid programs into re-opening files via
481: /dev/fd.</a>
1.321 brad 482: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 483: A buffer overflow has been found in the Perl interpreter with the
484: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 485: </ul>
486:
487: <li>
1.312 david 488: <a name="37"></a>
489:
490: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
491: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 492: in <a href="anoncvs.html">OpenBSD current</a>. The
493: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
494: you should update your machine.
1.312 david 495:
496: <p>
497: <ul>
1.322 brad 498: <li><a href="errata37.html#xorg">May 2, 2006:
499: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 500: <li><a href="errata37.html#sendmail">Mar 25, 2006:
501: A race condition has been reported to exist in the handling by sendmail
502: of asynchronous signals.</a>
1.320 brad 503: <li><a href="errata37.html#ssh">Feb 12, 2006:
504: Josh Bressers has reported a weakness in OpenSSH caused due to the
505: insecure use of the system(3) function in scp(1) when performing copy
506: operations using filenames that are supplied by the user from the
507: command line.</a>
1.319 brad 508: <li><a href="errata37.html#fd">Jan 5, 2006:
509: Do not allow users to trick suid programs into re-opening files via
510: /dev/fd.</a>
511: <li><a href="errata37.html#perl">Jan 5, 2006:
512: A buffer overflow has been found in the Perl interpreter with the
513: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 514: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 515: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 516: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 517: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 518: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 519: Fix a race condition in sudo(8) that could allow a user
1.315 millert 520: to run arbitrary commands.</a>
1.318 deraadt 521: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 522: Fix a buffer overflow, memory leaks, and NULL pointer
523: dereference in cvs(1).</a>
1.312 david 524: </ul>
525:
526: <li>
1.301 miod 527: <a name="36"></a>
528:
529: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
530: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 531: in <a href="anoncvs.html">OpenBSD current</a>. The
532: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
533: you should update your machine.
1.301 miod 534:
535: <p>
1.302 markus 536: <ul>
1.317 millert 537: <li><a href="errata36.html#libz2">Jul 21, 2005:
538: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 539: <li><a href="errata36.html#libz">Jul 6, 2005:
540: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 541: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 542: Fix a race condition in sudo(8) that could allow a user
1.315 millert 543: to run arbitrary commands.</a>
1.311 deraadt 544: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 545: Fix a buffer overflow, memory leaks, and NULL pointer
546: dereference in cvs(1).</a>
1.311 deraadt 547: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 548: Due to buffer overflows in telnet(1), a malicious
549: server or man-in-the-middle attack could allow
550: execution of arbitrary code with the privileges of
551: the user invoking telnet(1).</a>
1.311 deraadt 552: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 553: More stringent checking should be done in the copy(9)
554: functions to prevent their misuse.</a>
1.311 deraadt 555: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 556: More stringent checking should be done in the copy(9)
557: functions to prevent their misuse.</a>
1.311 deraadt 558: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 559: httpd(8)'s mod_include module fails to properly validate
560: the length of user supplied tag strings prior to copying
1.305 brad 561: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 562: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 563: On systems running isakmpd(8) it is possible for a local
564: user to cause kernel memory corruption and system panic by
1.303 markus 565: setting ipsec(4) credentials on a socket.</a>
1.302 markus 566: </ul>
1.301 miod 567:
568: <li>
1.288 matthieu 569: <a name="35"></a>
1.279 deraadt 570:
1.294 david 571: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 572: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 573: in <a href="anoncvs.html">OpenBSD current</a>. The
574: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
575: you should update your machine.
1.279 deraadt 576:
577: <p>
578: <ul>
1.310 brad 579: <li><a href="errata35.html#cvs4">Apr 28, 2005:
580: Fix a buffer overflow, memory leaks, and NULL pointer
581: dereference in cvs(1).</a>
1.309 brad 582: <li><a href="errata35.html#telnet">Mar 30, 2005:
583: Due to buffer overflows in telnet(1), a malicious
584: server or man-in-the-middle attack could allow
585: execution of arbitrary code with the privileges of
586: the user invoking telnet(1).</a>
1.308 brad 587: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 588: More stringent checking should be done in the copy(9)
589: functions to prevent their misuse.</a>
1.306 brad 590: <li><a href="errata35.html#locore">Feb 28, 2005:
591: More stringent checking should be done in the copy(9)
592: functions to prevent their misuse.</a>
1.304 brad 593: <li><a href="errata35.html#httpd3">Jan 12, 2005:
594: httpd(8)'s mod_include module fails to properly validate
595: the length of user supplied tag strings prior to copying
1.305 brad 596: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 597: <li><a href="errata35.html#pfkey">Dec 14, 2004:
598: On systems running isakmpd(8) it is possible for a local
599: user to cause kernel memory corruption and system panic by
1.303 markus 600: setting ipsec(4) credentials on a socket.</a>
1.301 miod 601: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 602: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 603: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 604: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 605: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 606: httpd(8)'s mod_rewrite module can be made to write one zero byte in
607: an arbitrary memory position outside of a char array, causing a DoS
608: or possibly buffer overflows.</a>
1.301 miod 609: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 610: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 611: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 612: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 613: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 614: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 615: Multiple remote vulnerabilities have been found in the cvs(1)
616: server which can be used by CVS clients to crash or execute
1.293 brad 617: arbitrary code on the server.</a>
1.301 miod 618: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 619: kdc(8) performs inadequate checking of request fields, leading
620: to the possibility of principal impersonation from other
621: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 622: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 623: xdm(1) ignores the requestPort resource and creates a
1.293 brad 624: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 625: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 626: A buffer overflow in the cvs(1) server has been found,
627: which can be used by CVS clients to execute arbitrary code on
1.293 brad 628: the server.</a>
1.301 miod 629: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 630: Integer overflow problems were found in procfs, allowing
1.293 brad 631: reading of arbitrary kernel memory.</a>
1.301 miod 632: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 633: Pathname validation problems have been found in cvs(1),
634: allowing clients and servers access to files outside the
1.293 brad 635: repository or local CVS tree.</a>
1.279 deraadt 636: </ul>
637:
638: <p>
639: <li>
1.288 matthieu 640: <a name="34"></a>
1.261 david 641:
1.294 david 642: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 643: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 644: in <a href="anoncvs.html">OpenBSD current</a>. The
645: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
646: you should update your machine.
1.261 david 647: <p>
648: <ul>
1.302 markus 649: <li><a href="errata34.html#pfkey">Dec 14, 2004:
650: On systems running isakmpd(8) it is possible for a local
651: user to cause kernel memory corruption and system panic by
1.303 markus 652: setting ipsec(4) credentials on a socket.</a>
1.298 brad 653: <li><a href="errata34.html#xpm">Sep 16, 2004:
654: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 655: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
656: httpd(8)'s mod_rewrite module can be made to write one zero byte in
657: an arbitrary memory position outside of a char array, causing a DoS
658: or possibly buffer overflows.</a>
1.294 david 659: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 660: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 661: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 662: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 663: an attacker can delete IPsec tunnels at will.</a>
1.294 david 664: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 665: Multiple remote vulnerabilities have been found in the cvs(1)
666: server which can be used by CVS clients to crash or execute
1.293 brad 667: arbitrary code on the server.</a>
1.294 david 668: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 669: kdc(8) performs inadequate checking of request fields, leading
670: to the possibility of principal impersonation from other
671: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 672: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 673: A buffer overflow in the cvs(1) server has been found,
674: which can be used by CVS clients to execute arbitrary code on
675: the server.</a>
1.294 david 676: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 677: Integer overflow problems were found in procfs, allowing
678: reading of arbitrary kernel memory.</a>
1.294 david 679: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 680: Pathname validation problems have been found in cvs(1),
681: allowing clients and servers access to files outside the
682: repository or local CVS tree.</a>
1.294 david 683: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 684: A missing check for a NULL-pointer dereference may allow a
1.281 otto 685: remote attacker to crash applications using OpenSSL.</a>
1.294 david 686: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 687: Defects in the payload validation and processing functions of
688: isakmpd have been discovered. An attacker could send malformed
689: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 690: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 691: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
692: access module, using IP addresses without a netmask on big endian
693: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 694: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 695: An IPv6 MTU handling problem exists that could be used by an
696: attacker to cause a denial of service attack.</a>
1.294 david 697: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 698: A reference counting bug in shmat(2) could be used to write to
699: kernel memory under certain circumstances.</a>
1.294 david 700: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 701: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 702: by Thomas Walpuski.</a>
1.294 david 703: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 704: It may be possible for a local user to overrun the stack in
705: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 706: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 707: The use of certain ASN.1 encodings or malformed public keys may
708: allow an attacker to mount a denial of service attack against
709: applications linked with ssl(3).</a>
1.261 david 710: </ul>
711:
712: <li>
1.288 matthieu 713: <a name="33"></a>
1.246 deraadt 714:
1.294 david 715: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 716: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 717: in <a href="anoncvs.html">OpenBSD current</a>. The
718: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 719: you should update your machine.
1.246 deraadt 720: <p>
721: <ul>
1.294 david 722: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 723: Pathname validation problems have been found in cvs(1),
724: allowing clients and servers access to files outside the
725: repository or local CVS tree.</a>
1.294 david 726: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 727: A missing check for a NULL-pointer dereference may allow a
1.281 otto 728: remote attacker to crash applications using OpenSSL.</a>
1.294 david 729: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 730: Defects in the payload validation and processing functions of
731: isakmpd have been discovered. An attacker could send malformed
732: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 733: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 734: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
735: access module, using IP addresses without a netmask on big endian
736: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 737: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 738: An IPv6 MTU handling problem exists that could be used by an
739: attacker to cause a denial of service attack.</a>
1.294 david 740: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 741: A reference counting bug in shmat(2) could be used to write to
742: kernel memory under certain circumstances.</a>
1.294 david 743: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 744: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 745: by Thomas Walpuski.</a>
1.294 david 746: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 747: It may be possible for a local user to execute arbitrary code
748: resulting in escalation of privileges due to a stack overrun
749: in compat_ibcs2(8).</a>
1.294 david 750: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 751: The use of certain ASN.1 encodings or malformed public keys may
752: allow an attacker to mount a denial of service attack against
753: applications linked with ssl(3).</a>
1.294 david 754: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 755: Access of freed memory in pf(4) could be used to
1.260 margarid 756: remotely panic a machine using scrub rules.</a>
1.294 david 757: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 758: A buffer overflow in the address parsing in
759: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 760: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 761: OpenSSH versions prior to 3.7 contains a buffer management error
762: that is potentially exploitable.</a>
1.294 david 763: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 764: Root may be able to reduce the security level by taking advantage of
765: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 766: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 767: An improper bounds check in the kernel may allow a local user
768: to panic the kernel.</a>
1.294 david 769: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 770: An off-by-one error exists in the C library function realpath(3)
771: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 772: </ul>
773:
1.265 miod 774:
1.247 david 775: <p>
1.246 deraadt 776: <li>
1.288 matthieu 777: <a name="32"></a>
1.224 deraadt 778:
1.294 david 779: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 780: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 781: in <a href="anoncvs.html">OpenBSD current</a>. The
782: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 783: you should update your machine.
1.224 deraadt 784: <p>
785: <ul>
1.294 david 786: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 787: The use of certain ASN.1 encodings or malformed public keys may
788: allow an attacker to mount a denial of service attack against
789: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 790: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 791: Access of freed memory in pf(4) could be used to
1.260 margarid 792: remotely panic a machine using scrub rules.</a>
1.294 david 793: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 794: A buffer overflow in the address parsing in
795: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 796: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 797: OpenSSH versions prior to 3.7 contains a buffer management error
798: that is potentially exploitable.</a>
1.294 david 799: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 800: Fix for a potential security issue in
801: sendmail(8) with respect to DNS maps.</a>
1.294 david 802: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 803: An off-by-one error exists in the C library function realpath(3)
804: may allow an attacker to gain escalated privileges.</a>
1.294 david 805: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 806: A buffer overflow in the address parsing in
807: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 808: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 809: A cryptographic weaknesses in the Kerberos v4 protocol can be
810: exploited on Kerberos v5 as well.</a>
1.294 david 811: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 812: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 813: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 814: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 815: Various SSL and TLS operations in OpenSSL are vulnerable to
816: timing attacks.</a>
1.294 david 817: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 818: A buffer overflow in lprm(1) may allow an attacker to elevate
819: privileges to user daemon.</a>.
1.294 david 820: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 821: A buffer overflow in the envelope comments processing in
822: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 823: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 824: httpd(8) leaks file inode numbers via ETag header as well as
825: child PIDs in multipart MIME boundary generation. This could
826: lead, for example, to NFS exploitation because it uses inode
827: numbers as part of the file handle.</a>
1.294 david 828: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 829: In ssl(8) an information leak can occur via timing by performing
830: a MAC computation even if incorrect block cipher padding has
831: been found, this is a countermeasure. Also, check for negative
832: sizes, in allocation routines.</a>
1.294 david 833: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 834: A double free exists in cvs(1) that could lead to privilege
835: escalation for cvs configurations where the cvs command is
1.233 margarid 836: run as a privileged user.</a>
1.294 david 837: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 838: A buffer overflow exists in named(8) that could lead to a
839: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 840: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 841: A logic error in the pool kernel memory allocator could cause
842: memory corruption in low-memory situations, causing the system
843: to crash.</a>
1.294 david 844: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 845: An attacker can bypass smrsh(8)'s restrictions and execute
846: arbitrary commands with the privileges of his own account.</a>
1.294 david 847: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 848: Network bridges running pf with scrubbing enabled could cause
849: mbuf corruption, causing the system to crash.</a>
1.294 david 850: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 851: A buffer overflow can occur in the kadmind(8) daemon, leading
852: to possible remote crash or exploit.</a>
1.224 deraadt 853: </ul>
854:
1.227 miod 855: <p>
856: <li>
1.288 matthieu 857: <a name="31"></a>
1.203 deraadt 858:
1.294 david 859: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 860: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 861: in <a href="anoncvs.html">OpenBSD current</a>. The
862: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 863: you should update your machine.
1.203 deraadt 864:
865: <p>
866: <ul>
1.294 david 867: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 868: A buffer overflow in the address parsing in
869: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 870: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 871: A cryptographic weaknesses in the Kerberos v4 protocol can be
872: exploited on Kerberos v5 as well.</a>
1.294 david 873: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 874: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 875: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 876: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 877: Various SSL and TLS operations in OpenSSL are vulnerable to
878: timing attacks.</a>
1.294 david 879: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 880: A buffer overflow in lprm(1) may allow an attacker to gain
881: root privileges.</a>
1.294 david 882: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 883: A buffer overflow in the envelope comments processing in
884: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 885: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 886: In ssl(8) an information leak can occur via timing by performing
887: a MAC computation even if incorrect block cipher padding has
888: been found, this is a countermeasure. Also, check for negative
889: sizes, in allocation routines.</a>
1.294 david 890: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 891: A double free exists in cvs(1) that could lead to privilege
892: escalation for cvs configurations where the cvs command is
1.294 david 893: run as a privileged user</a>.
894: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 895: A buffer overflow exists in named(8) that could lead to a
896: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 897: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 898: Incorrect argument checking in the getitimer(2) system call
899: may allow an attacker to crash the system.</a>
1.294 david 900: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 901: An attacker can bypass smrsh(8)'s restrictions and execute
902: arbitrary commands with the privileges of his own account.</a>
1.294 david 903: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 904: A buffer overflow can occur in the kadmind(8) daemon, leading
905: to possible remote crash or exploit.</a>
1.294 david 906: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 907: Incorrect argument checking in the setitimer(2) system call
908: may allow an attacker to write to kernel memory.</a>
1.294 david 909: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 910: An insufficient boundary check in the select system call
1.220 miod 911: allows an attacker to overwrite kernel memory and execute arbitrary code
912: in kernel context.</a>
1.294 david 913: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 914: Several remote buffer overflows can occur in the SSL2 server and SSL3
915: client of the ssl(8) library, as in the ASN.1 parser code in the
916: crypto(3) library, all of them being potentially remotely
917: exploitable.</a>
1.294 david 918: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 919: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
920: possible remote crash.</a>
1.294 david 921: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 922: A race condition exists in the pppd(8) daemon which may cause it to
923: alter the file permissions of an arbitrary file.</a>
1.294 david 924: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 925: Receiving IKE payloads out of sequence can cause isakmpd(8) to
926: crash.</a>
1.294 david 927: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 928: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 929: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 930: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 931: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 932: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 933: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 934: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 935: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 936: input validation error that can result in an integer overflow and
937: privilege escalation.</a>
1.294 david 938: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 939: A buffer overflow can occur during the interpretation of chunked
940: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 941: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 942: Under certain conditions, on systems using YP with netgroups
943: in the password database, it is possible that sshd(8) does
944: ACL checks for the requested user name but uses the password
945: database entry of a different user for authentication. This
946: means that denied users might authenticate successfully
947: while permitted users could be locked out.</a>
1.294 david 948: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 949: A race condition exists that could defeat the kernel's
950: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 951: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 952: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 953: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 954: A local user can gain super-user privileges due to a buffer
955: overflow in sshd(8) if AFS has been configured on the system
956: or if KerberosTgtPassing or AFSTokenPassing has been enabled
957: in the sshd_config file.</a>
1.203 deraadt 958: </ul>
959:
1.235 miod 960: <p>
1.203 deraadt 961: <li>
1.288 matthieu 962: <a name="30"></a>
1.187 deraadt 963:
1.294 david 964: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 965: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 966: in <a href="anoncvs.html">OpenBSD current</a>. The
967: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 968: you should update your machine.
1.187 deraadt 969:
970: <p>
971: <ul>
1.294 david 972: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 973: A buffer overflow exists in named(8) that could lead to a
974: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 975: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 976: Incorrect argument checking in the getitimer(2) system call
977: may allow an attacker to crash the system.</a>
1.294 david 978: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 979: An attacker can bypass smrsh(8)'s restrictions and execute
980: arbitrary commands with the privileges of his own account.</a>
1.294 david 981: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 982: A buffer overflow can occur in the kadmind(8) daemon, leading
983: to possible remote crash or exploit.</a>
1.294 david 984: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 985: Incorrect argument checking in the setitimer(2) system call
986: may allow an attacker to write to kernel memory.</a>
1.294 david 987: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 988: An insufficient boundary check in the select and poll system calls
989: allows an attacker to overwrite kernel memory and execute arbitrary code
990: in kernel context.</a>
1.294 david 991: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 992: Several remote buffer overflows can occur in the SSL2 server and SSL3
993: client of the ssl(8) library, as in the ASN.1 parser code in the
994: crypto(3) library, all of them being potentially remotely
995: exploitable.</a>
1.294 david 996: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 997: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
998: possible remote crash.</a>
1.294 david 999: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1000: A race condition exists in the pppd(8) daemon which may cause it to
1001: alter the file permissions of an arbitrary file.</a>
1.294 david 1002: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1003: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1004: crash.</a>
1.294 david 1005: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1006: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1007: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1008: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1009: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1010: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1011: input validation error that can result in an integer overflow and
1012: privilege escalation.</a>
1.294 david 1013: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1014: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1015: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1016: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1017: A buffer overflow can occur during the interpretation of chunked
1018: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1019: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1020: A race condition exists that could defeat the kernel's
1021: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1022: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1023: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1024: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1025: A local user can gain super-user privileges due to a buffer
1026: overflow in sshd(8) if AFS has been configured on the system
1027: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1028: in the sshd_config file.</a>
1.294 david 1029: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1030: The mail(1) was interpreting tilde escapes even when invoked
1031: in non-interactive mode. As mail(1) is called as root from cron,
1032: this can lead to a local root compromise.</a>
1.294 david 1033: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1034: Under certain conditions, on systems using YP with netgroups in
1035: the password database, it is possible for the rexecd(8) and rshd(8)
1036: daemons to execute a shell from a password database entry for a
1037: different user. Similarly, atrun(8) may change to the wrong
1038: home directory when running jobs.</a>
1.294 david 1039: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1040: A potential double free() exists in the zlib library;
1041: this is not exploitable on OpenBSD.
1042: The kernel also contains a copy of zlib; it is not
1043: currently known if the kernel zlib is exploitable.</a>
1.294 david 1044: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1045: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1046: may allow a local user to gain super-user privileges.</a>
1.294 david 1047: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1048: A race condition between the ptrace(2) and execve(2) system calls
1049: allows an attacker to modify the memory contents of suid/sgid
1050: processes which could lead to compromise of the super-user account.</a>
1.294 david 1051: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1052: There is a security hole in sudo(8) that can be exploited
1053: when the Postfix sendmail replacement is installed that may
1054: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1055: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1056: An attacker can trick a machine running the lpd daemon into
1057: creating new files in the root directory from a machine with
1058: remote line printer access.</a>
1.294 david 1059: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1060: The vi.recover script can be abused in such a way as
1061: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1062: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1063: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1064: resulting in a crash.</a>
1.294 david 1065: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1066: A security hole that may allow an attacker to partially authenticate
1067: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1068: </ul>
1069:
1070: <p>
1071: <li>
1.288 matthieu 1072: <a name="29"></a>
1.173 deraadt 1073:
1.294 david 1074: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1075: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1076: in <a href="anoncvs.html">OpenBSD current</a>. The
1077: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1078: you should update your machine.
1079:
1.173 deraadt 1080:
1081: <p>
1082: <ul>
1.294 david 1083: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1084: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1085: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1086: A race condition exists that could defeat the kernel's
1087: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1088: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1089: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1090: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1091: A local user can gain super-user privileges due to a buffer
1092: overflow in sshd(8) if AFS has been configured on the system
1093: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1094: in the sshd_config file.</a>
1.294 david 1095: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1096: The mail(1) was interpreting tilde escapes even when invoked
1097: in non-interactive mode. As mail(1) is called as root from cron,
1098: this can lead to a local root compromise.</a>
1.294 david 1099: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1100: A potential double free() exists in the zlib library;
1101: this is not exploitable on OpenBSD.
1102: The kernel also contains a copy of zlib; it is not
1103: currently known if the kernel zlib is exploitable.</a>
1.294 david 1104: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1105: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1106: may allow a local user to gain super-user privileges.</a>
1.294 david 1107: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1108: A race condition between the ptrace(2) and execve(2) system calls
1109: allows an attacker to modify the memory contents of suid/sgid
1110: processes which could lead to compromise of the super-user account.</a>
1.294 david 1111: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1112: There is a security hole in sudo(8) that can be exploited
1113: when the Postfix sendmail replacement is installed that may
1114: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1115: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1116: An attacker can trick a machine running the lpd daemon into
1117: creating new files in the root directory from a machine with
1118: remote line printer access.</a>
1.294 david 1119: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1120: The vi.recover script can be abused in such a way as
1121: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1122: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1123: A security hole exists in uuxqt(8) that may allow an
1124: attacker to gain root privileges.</a>
1.294 david 1125: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1126: A security hole exists in lpd(8) that may allow an
1127: attacker to gain root privileges if lpd is running.</a>
1.294 david 1128: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1129: A security hole exists in sendmail(8) that may allow an
1130: attacker on the local host to gain root privileges.</a>
1.294 david 1131: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1132: A kernel buffer overflow in the NFS code can be used to execute
1133: arbitrary code by users with mount privileges (only root by
1.181 millert 1134: default).</a>
1.294 david 1135: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1136: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1137: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1138: sshd(8) allows users to delete arbitrary files named "cookies"
1139: if X11 forwarding is enabled. X11 forwarding is disabled
1140: by default.</a>
1.294 david 1141: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1142: Programs using the fts routines can be tricked into changing
1143: into the wrong directory.</a>
1.294 david 1144: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1145: Sendmail signal handlers contain unsafe code,
1146: leading to numerous race conditions.</a>
1.173 deraadt 1147: </ul>
1148:
1149: <p>
1150: <li>
1.288 matthieu 1151: <a name="28"></a>
1.152 deraadt 1152:
1.294 david 1153: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1154: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1155: in <a href="anoncvs.html">OpenBSD current</a>. The
1156: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1157: you should update your machine.
1158:
1.152 deraadt 1159:
1160: <p>
1161: <ul>
1.294 david 1162: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1163: A security hole exists in uuxqt(8) that may allow an
1164: attacker to gain root privileges.</a>
1.294 david 1165: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1166: A security hole exists in lpd(8) that may allow an
1167: attacker to gain root privileges if lpd is running.</a>
1.294 david 1168: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1169: A security hole exists in sendmail(8) that may allow an
1170: attacker on the local host to gain root privileges.</a>
1.294 david 1171: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1172: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1173: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1174: Programs using the fts routines can be tricked into changing
1175: into the wrong directory.</a>
1.294 david 1176: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1177: Sendmail signal handlers contain unsafe code,
1178: leading to numerous race conditions.</a>
1.294 david 1179: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1180: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1181: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1182: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1183: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1184: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1185: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1186: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1187: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1188: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1189: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1190: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1191: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1192: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1193: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1194: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1195: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1196: rnd(4) did not use all of its input when written to.</a>
1.294 david 1197: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1198: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1199: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1200: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1201: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1202: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1203: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1204: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1205: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1206: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1207: </ul>
1208:
1209: <p>
1210: <li>
1.288 matthieu 1211: <a name="27"></a>
1.124 deraadt 1212:
1.294 david 1213: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1214: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1215: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1216: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1217:
1218: <p>
1219: <ul>
1.294 david 1220: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1221: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1222: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1223: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1224: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1225: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1226: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1227: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1228: (patch included)</a>
1.294 david 1229: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1230: X11 libraries have 2 potential overflows in xtrans code.
1231: (patch included)</a>
1.294 david 1232: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1233: Apache mod_rewrite and mod_vhost_alias modules could expose files
1234: on the server in certain configurations if used.
1235: (patch included)</a>
1.294 david 1236: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1237: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1238: TERMPATH and TERMCAP environment variables as it should.
1239: (patch included)</a>
1.294 david 1240: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1241: There are printf-style format string bugs in several privileged
1242: programs. (patch included)</a>
1.294 david 1243: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1244: libcurses honored terminal descriptions in the $HOME/.terminfo
1245: directory as well as in the TERMCAP environment variable for
1246: setuid and setgid applications.
1.146 deraadt 1247: (patch included)</a>
1.294 david 1248: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1249: A format string vulnerability exists in talkd(8).
1250: (patch included)</a>
1.294 david 1251: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1252: A format string vulnerability exists in the pw_error() function of the
1253: libutil library, yielding localhost root through chpass(1).
1254: (patch included)</a>
1.294 david 1255: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1256: Bad ESP/AH packets could cause a crash under certain conditions.
1257: (patch included)</a>
1.294 david 1258: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1259: A format string vulnerability (localhost root) exists in xlock(1).
1260: (patch included)</a>
1.294 david 1261: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1262: Various bugs found in X11 libraries have various side effects, almost
1263: completely denial of service in OpenBSD.
1264: (patch included)</a>
1.294 david 1265: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1266: Just like pretty much all the other unix ftp daemons
1267: on the planet, ftpd had a remote root hole in it.
1268: Luckily, ftpd was not enabled by default.
1.137 deraadt 1269: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1270: (patch included)</a>
1.294 david 1271: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1272: Mopd, very rarely used, contained some buffer overflows.
1273: (patch included)</a>
1.294 david 1274: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1275: libedit would check for a <b>.editrc</b> file in the current
1276: directory. Not known to be a real security issue, but a patch
1277: is available anyways.
1278: (patch included)</a>
1.294 david 1279: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1280: A serious bug in dhclient(8) could allow strings from a
1281: malicious dhcp server to be executed in the shell as root.
1282: (patch included)</a>
1.294 david 1283: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1284: A serious bug in isakmpd(8) policy handling wherein
1285: policy verification could be completely bypassed in isakmpd.
1286: (patch included)</a>
1.294 david 1287: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1288: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1289: should not be used, and results in security problems on
1290: other operating systems.</a>
1.294 david 1291: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1292: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1293: (patch included)</a>
1.294 david 1294: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1295: Improper use of ipf <i>keep-state</i> rules can result
1296: in firewall rules being bypassed. (patch included)</a>
1297:
1.124 deraadt 1298: </ul>
1299:
1300: <p>
1301: <li>
1.288 matthieu 1302: <a name="26"></a>
1.119 deraadt 1303:
1.294 david 1304: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1305: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1306: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1307: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1308:
1309: <p>
1310: <ul>
1.294 david 1311: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1312: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1313: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1314: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1315: Improper use of ipf <i>keep-state</i> rules can result
1316: in firewall rules being bypassed. (patch included)</a>
1.294 david 1317: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1318: xlockmore has a bug which a localhost attacker can use to gain
1319: access to the encrypted root password hash (which is normally
1.245 miod 1320: encoded using blowfish</a> (see
1.294 david 1321: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1322: crypt(3)</a>)
1.245 miod 1323: (patch included).
1.294 david 1324: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1325: Systems running with procfs enabled and mounted are
1326: vulnerable to a very tricky exploit. procfs is not
1327: mounted by default.
1328: (patch included).</a>
1.294 david 1329: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1330: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1331: thus exposing the system to a race where the aliases file
1332: did not exist.
1.119 deraadt 1333: (patch included).</a>
1.294 david 1334: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1335: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1336: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1337: A buffer overflow in the RSAREF code included in the
1338: USA version of libssl, is possibly exploitable in
1339: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1340: (patch included).<br></a>
1341: <strong>Update:</strong> Turns out that this was not exploitable
1342: in any of the software included in OpenBSD 2.6.
1.294 david 1343: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1344: Any user could change interface media configurations, resulting in
1345: a localhost denial of service attack.
1.121 deraadt 1346: (patch included).</a>
1.119 deraadt 1347: </ul>
1348:
1349: <p>
1350: <li>
1.288 matthieu 1351: <a name="25"></a>
1.106 deraadt 1352:
1.294 david 1353: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1354: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1355: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1356: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1357:
1.96 deraadt 1358: <p>
1.104 deraadt 1359: <ul>
1.294 david 1360: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1361: In cron(8), make sure argv[] is NULL terminated in the
1362: fake popen() and run sendmail as the user, not as root.
1363: (patch included).</a>
1.294 david 1364: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1365: filesystems had an overrun in their handling of uio_offset
1366: in their readdir() routines. (These filesystems are not
1367: enabled by default). (patch included).</a>
1.294 david 1368: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1369: when we execve() a new process. (patch included).</a>
1.294 david 1370: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1371: been handled by IPsec may be transmitted as cleartext.
1372: PF_KEY SA expirations may leak kernel resources.
1373: (patch included).</a>
1.294 david 1374: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1375: motd re-writing and change the find(1) to use -execdir
1376: (patch included).</a>
1.294 david 1377: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1378: users to chflags(2) or fchflags(2) on character or block devices
1379: which they may currently be the owner of (patch included).</a>
1.294 david 1380: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1381: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1382: </ul>
1383:
1.106 deraadt 1384: <p>
1385: <li>
1.288 matthieu 1386: <a name="24"></a>
1.235 miod 1387:
1.294 david 1388: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1389: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1390: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1391: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1392:
1.96 deraadt 1393: <p>
1.75 deraadt 1394: <ul>
1.294 david 1395: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1396: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1397: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1398: another kernel crash case caused by the <strong>crashme</strong>
1399: program (patch included).</a>
1.294 david 1400: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1401: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1402: (patch included).</a>
1.294 david 1403: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1404: existed in ping(8). (patch included).</a>
1.294 david 1405: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1406: the ipq, which could permit an attacker to cause a crash.
1407: (patch included).</a>
1.294 david 1408: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1409: kernel between accept(2) and select(2) could permit an attacker
1410: to hang sockets from remote.
1411: (patch included).</a>
1.294 david 1412: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1413: bog the machine excessively and cause problems.
1414: (patch included).</a>
1.294 david 1415: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1416: DDB interacted to possibly cause a crash.
1417: (patch included).</a>
1.294 david 1418: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1419: (patch included).</a>
1.294 david 1420: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1421: problem in bootpd(8). (patch included).</a>
1.294 david 1422: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1423: exploitable problem relating to environment variables in termcap
1424: and curses. (patch included).</a>
1.294 david 1425: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1426: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1427: </ul>
1428:
1.106 deraadt 1429: <p>
1430: <li>
1.288 matthieu 1431: <a name="23"></a>
1.235 miod 1432:
1.294 david 1433: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1434: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1435: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1436: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1437:
1.96 deraadt 1438: <p>
1.53 matthieu 1439: <ul>
1.294 david 1440: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1441: problem in bootpd(8). (patch included).</a>
1.294 david 1442: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1443: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1444: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1445: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1446: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1447: chpass(1) has a file descriptor leak which allows an
1448: attacker to modify /etc/master.passwd.</a>
1.294 david 1449: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1450: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1451: should not be executed with fd slots 0, 1, or 2 free.
1452: (patch included).</a>
1.294 david 1453: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1454: libraries (patches included).</a>
1.294 david 1455: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1456: processes too permissive (4th revision patch included).</a>
1.294 david 1457: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1458: of immutable and append-only file flags. (patch included).</a>
1.294 david 1459: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1460: if IPSEC is enabled (patch included).</a>
1.294 david 1461: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1462: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1463: </ul>
1.9 deraadt 1464:
1.106 deraadt 1465: <p>
1466: <li>
1.288 matthieu 1467: <a name="22"></a>
1.235 miod 1468:
1.294 david 1469: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1470: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1471: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1472: still exist in other operating systems. (The supplied patches are for
1473: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1474:
1.96 deraadt 1475: <p>
1.9 deraadt 1476: <ul>
1.294 david 1477: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1478: packets if IPSEC is enabled (patch included).</a>
1.294 david 1479: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1480: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1481: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1482: (patch included).</a>
1.294 david 1483: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1484: (patch included).</a>
1.294 david 1485: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1486: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1487: (patch included).</a>
1.294 david 1488: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1489: export (patch included).</a>
1.112 philen 1490: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1491: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1492: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1493: Acceptance.</a>
1.294 david 1494: A patch is available <a href="errata22.html#sourceroute">here</a>.
1495: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1496: flaw (patch included).</a>
1.294 david 1497: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1498: </ul>
1499:
1.106 deraadt 1500: <p>
1501: <li>
1.288 matthieu 1502: <a name="21"></a>
1.235 miod 1503:
1.294 david 1504: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1505: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1506: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1507: exist in other operating systems. (If you are running OpenBSD 2.1, we
1508: would strongly recommend an upgrade to the newest release, as this
1509: patch list only attempts at fixing the most important security
1510: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1511: security problems. Many of those problems were solved in ways which
1512: make it hard for us to provide patches).
1513:
1.96 deraadt 1514: <p>
1.52 deraadt 1515: <ul>
1.112 philen 1516: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1517: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1518: (patch included)</a>
1.112 philen 1519: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1520: </ul>
1.51 deraadt 1521:
1.106 deraadt 1522: <p>
1523: <li>
1.288 matthieu 1524: <a name="20"></a>
1.235 miod 1525:
1.294 david 1526: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1527: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1528: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1529: exist in other operating systems. (If you are running OpenBSD 2.0, we
1530: commend you for being there back in the old days!, but you're really
1531: missing out if you don't install a new version!)
1532:
1533: <p>
1534: <ul>
1.112 philen 1535: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1536: resolver (patch included)</a>
1537: <li>Many others... if people can hunt them down, please let me know
1538: and we'll put them up here.
1539: </ul>
1.51 deraadt 1540: <p>
1.106 deraadt 1541:
1.288 matthieu 1542: <a name="watching"></a>
1.294 david 1543: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1544:
1.21 deraadt 1545: Since we take a proactive stance with security, we are continually
1546: finding and fixing new security problems. Not all of these problems
1.80 espie 1547: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1548: confirmed to be exploitable; many simple bugs we fix do turn out to
1549: have security consequences we could not predict. We do not have the
1550: time resources to make these changes available in the above format.<p>
1.21 deraadt 1551:
1552: Thus there are usually minor security fixes in the current source code
1553: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1554: guarantee that these problems are of minimal impact and unproven
1.44 ian 1555: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1556: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1557:
1.45 deraadt 1558: People who are really concerned with security can do a number of
1559: things:<p>
1.21 deraadt 1560:
1561: <ul>
1562: <li>If you understand security issues, watch our
1.294 david 1563: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1564: eye out for things which appear security related. Since
1.21 deraadt 1565: exploitability is not proven for many of the fixes we make,
1566: do not expect the relevant commit message to say "SECURITY FIX!".
1567: If a problem is proven and serious, a patch will be available
1568: here very shortly after.
1.161 horacio 1569: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1570: security-announce mailing list</a> which will notify you for every
1.186 ian 1571: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1572: and instruct you on how to patch the problem.
1.21 deraadt 1573: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1574: complete system build from time to time (read /usr/src/Makefile
1575: carefully). Users can make the assumption that the current
1576: source tree always has stronger security than the previous release.
1.45 deraadt 1577: However, building your own system from source code is not trivial;
1.265 miod 1578: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1579: transition between major releases.
1.115 ericj 1580: <li>Install a binary snapshot for your
1.80 espie 1581: architecture, which are made available fairly often. For
1.29 deraadt 1582: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1583: </ul>
1584:
1.9 deraadt 1585: <p>
1.288 matthieu 1586: <a name="reporting"></a>
1.294 david 1587: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1588:
1.5 deraadt 1589: <p> If you find a new security problem, you can mail it to
1.294 david 1590: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1591: <br>
1.5 deraadt 1592: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1593: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1594:
1.107 deraadt 1595: <p>
1.288 matthieu 1596: <a name="papers"></a>
1.294 david 1597: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1598:
1599: A number of papers have been written by OpenBSD team members, about security
1600: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1601: documents are available as follows.<p>
1.107 deraadt 1602:
1603: <ul>
1.113 deraadt 1604: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1605: <a href="events.html#usenix99">Usenix 1999</a>,
1606: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1607: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1608: <a href="papers/bcrypt-paper.ps">paper</a> and
1609: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1610: <p>
1611: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1612: <a href="events.html#usenix99">Usenix 1999</a>,
1613: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1614: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1615: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1616: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1617: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1618: <a href="papers/crypt-paper.ps">paper</a> and
1619: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1620: <p>
1621: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1622: <a href="events.html#usenix99">Usenix 1999</a>,
1623: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1624: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1625: <a href="papers/strlcpy-paper.ps">paper</a> and
1626: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1627: <p>
1.118 deraadt 1628: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1629: <a href="events.html#lisa99">LISA 1999</a>,
1630: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1631: <a href="papers/authgw-paper.ps">paper</a> and
1632: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1633: <p>
1.153 jufi 1634: <li>Encrypting Virtual Memory<br>
1.294 david 1635: <a href="events.html#sec2000">Usenix Security 2000</a>,
1636: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1637: <a href="papers/swapencrypt.ps">paper</a> and
1638: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1639: <p>
1.107 deraadt 1640: </ul>
1.294 david 1641: </ul>
1.106 deraadt 1642:
1.2 deraadt 1643: <hr>
1.294 david 1644: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1645: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1646: <br>
1.360 ! tobias 1647: <small>$OpenBSD: security.html,v 1.359 2008/04/03 06:00:14 brad Exp $</small>
1.1 deraadt 1648:
1.24 deraadt 1649: </body>
1650: </html>
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