Annotation of www/security.html, Revision 1.363
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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>
1.363 ! brad 240: <li><a href="errata43.html#005_ndp">October 2, 2008:
! 241: The Neighbor Discovery Protocol (ndp) did not correctly verify
! 242: neighbor solicitation requests maybe allowing a nearby attacker
! 243: to intercept traffic.</a>
1.362 brad 244: <li><a href="errata43.html#004_bind">July 23, 2008:
245: A vulnerability has been found with BIND.</a>
1.361 brad 246: <li><a href="errata43.html#003_xorg">July 15, 2008:
247: Multiple vulnerabilities in X.Org.</a>
1.359 brad 248: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 249: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 250: <li><a href="errata43.html#001_openssh">March 30, 2008:
251: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 252: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 253: </ul>
254:
255:
256: <li>
1.348 merdely 257: <a name="42"></a>
258:
259: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
260: These are the OpenBSD 4.2 advisories -- all these problems are solved
261: in <a href=anoncvs.html>OpenBSD current</a> and the
262: <a href=stable.html>patch branch</a>.
263:
264: <p>
265: <ul>
1.363 ! brad 266: <li><a href="errata42.html#014_ndp">October 2, 2008:
! 267: The Neighbor Discovery Protocol (ndp) did not correctly verify
! 268: neighbor solicitation requests maybe allowing a nearby attacker
! 269: to intercept traffic.</a>
1.362 brad 270: <li><a href="errata42.html#013_bind">July 23, 2008:
271: A vulnerability has been found with BIND.</a>
1.361 brad 272: <li><a href="errata42.html#012_xorg2">July 15, 2008:
273: Multiple vulnerabilities in X.Org.</a>
1.359 brad 274: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 275: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 276: <li><a href="errata42.html#010_openssh">March 30, 2008:
277: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 278: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 279: <li><a href="errata42.html#009_ppp">March 7, 2008:
280: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 281: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
282: Multiple vulnerabilities in X.Org.</a>
1.352 henning 283: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
284: A missing NULL pointer check can lead to a kernel panic.</a>
285: <li><a href="errata42.html#004_pf">Nov 27, 2007:
286: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 287: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
288: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 289: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 290: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 291: </ul>
292:
293: <li>
1.346 matthieu 294: <a name="41"></a>
295:
296: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
297: These are the OpenBSD 4.1 advisories -- all these problems are solved
298: in <a href=anoncvs.html>OpenBSD current</a> and the
299: <a href=stable.html>patch branch</a>.
300:
301: <p>
302: <ul>
1.359 brad 303: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 304: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 305: <li><a href="errata41.html#015_openssh">March 30, 2008:
306: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 307: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 308: <li><a href="errata41.html#014_ppp">March 7, 2008:
309: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 310: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
311: Multiple vulnerabilities in X.Org.</a>
312: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
313: The SSL_get_shared_ciphers() function in OpenSSL contains
314: an off-by-one overflow.</a>
1.350 deraadt 315: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 316: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 317: <li><a href="errata41.html#009_file">Jul 9, 2007:
318: Fix possible heap overflow in file(1).</a>
1.346 matthieu 319: <li><a href="errata41.html#005_route6">Apr 27, 2007:
320: IPv6 type 0 route headers can be used to mount a DoS attack
321: against hosts and networks.</a>
322: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
323: Multiple vulnerabilities in X.Org.</a>
324: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
325: Incorrect mbuf handling for ICMP6 packets.</a>
326: </ul>
327:
1.355 miod 328: <p>
329: OpenBSD 4.0 and earlier releases are not supported anymore. The following
330: paragraphs only list advisories issued while they were maintained; these
331: releases are likely to be affected by the advisories for more recent releases.
332: <br>
333:
1.346 matthieu 334: <li>
1.334 brad 335: <a name="40"></a>
336: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
337: These are the OpenBSD 4.0 advisories -- all these problems are solved
338: in <a href=anoncvs.html>OpenBSD current</a> and the
339: <a href=stable.html>patch branch</a>.
340:
341: <p>
342: <ul>
1.350 deraadt 343: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 344: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 345: <li><a href="errata40.html#015_file">Jul 9, 2007:
346: Fix possible heap overflow in file(1).</a>
1.343 deraadt 347: <li><a href="errata40.html#012_route6">Apr 23, 2007:
348: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 349: against hosts and networks.</a>
1.342 mbalmer 350: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
351: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 352: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
353: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 354: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 355: Insufficient validation in vga(4) may allow an attacker to gain
356: root privileges on some i386 systems.</a>
1.339 deraadt 357: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 358: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 359: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 360: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
361: found by Chris Evans.</a>
1.339 deraadt 362: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 363: Several problems have been found in OpenSSL.</a>
1.339 deraadt 364: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 365: httpd(8) does not sanitize the Expect header from an HTTP request
366: when it is reflected back in an error message, which might allow
367: cross-site scripting (XSS) style attacks.</a>
368: </ul>
369:
370: <li>
1.321 brad 371: <a name="39"></a>
372:
373: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
374: These are the OpenBSD 3.9 advisories -- all these problems are solved
375: in <a href=anoncvs.html>OpenBSD current</a> and the
376: <a href=stable.html>patch branch</a>.
377:
378: <p>
379: <ul>
1.343 deraadt 380: <li><a href="errata39.html#022_route6">Apr 23, 2007:
381: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 382: against hosts and networks.</a>
1.342 mbalmer 383: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
384: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 385: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
386: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 387: <li><a href="errata39.html#agp">Jan 3, 2007:
388: Insufficient validation in vga(4) may allow an attacker to gain
389: root privileges on some i386 systems.</a>
1.336 brad 390: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 391: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 392: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 393: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 394: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 395: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 396: found by Chris Evans.</a>
1.333 deraadt 397: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 398: Several problems have been found in OpenSSL.</a>
1.333 deraadt 399: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 400: httpd(8) does not sanitize the Expect header from an HTTP request
401: when it is reflected back in an error message, which might allow
402: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 403: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 404: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
405: possible for an attacker to construct an invalid signature which
406: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 407: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 408: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 409: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 410: Due to the failure to correctly validate LCP configuration option
411: lengths, it is possible for an attacker to send LCP packets via an
412: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 413: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 414: A problem in isakmpd(8) caused IPsec to run partly without replay
415: protection.</a>
1.333 deraadt 416: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 417: It is possible to cause the kernel to panic when more than the default
418: number of sempahores have been allocated.</a>
1.333 deraadt 419: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 420: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
421: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
422: option.</a>
1.333 deraadt 423: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 424: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 425: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 426: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
427: overflow.</a>
1.333 deraadt 428: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 429: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 430: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 431: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 432: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 433: A race condition has been reported to exist in the handling by sendmail
434: of asynchronous signals.</a>
435: </ul>
436:
437: <li>
1.318 deraadt 438: <a name="38"></a>
439:
440: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
441: These are the OpenBSD 3.8 advisories -- all these problems are solved
442: in <a href=anoncvs.html>OpenBSD current</a> and the
443: <a href=stable.html>patch branch</a>.
444:
445: <p>
446: <ul>
1.332 brad 447: <li><a href="errata38.html#ssh2">Oct 12, 2006:
448: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 449: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 450: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 451: found by Chris Evans.</a>
452: <li><a href="errata38.html#openssl2">Oct 7, 2006:
453: Several problems have been found in OpenSSL.</a>
454: <li><a href="errata38.html#httpd2">Oct 7, 2006:
455: httpd(8) does not sanitize the Expect header from an HTTP request
456: when it is reflected back in an error message, which might allow
457: cross-site scripting (XSS) style attacks.</a>
1.329 brad 458: <li><a href="errata38.html#openssl">Sep 8, 2006:
459: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
460: possible for an attacker to construct an invalid signature which
461: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 462: <li><a href="errata38.html#bind">Sep 8, 2006:
463: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 464: <li><a href="errata38.html#sppp">Sep 2, 2006:
465: Due to the failure to correctly validate LCP configuration option
466: lengths, it is possible for an attacker to send LCP packets via an
467: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 468: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
469: A problem in isakmpd(8) caused IPsec to run partly without replay
470: protection.</a>
471: <li><a href="errata38.html#sem">Aug 25, 2006:
472: It is possible to cause the kernel to panic when more than the default
473: number of sempahores have been allocated.</a>
474: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
475: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
476: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
477: option.</a>
478: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
479: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 480: <li><a href="errata38.html#httpd">Jul 30, 2006:
481: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
482: overflow.</a>
1.324 brad 483: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
484: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 485: <li><a href="errata38.html#xorg">May 2, 2006:
486: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 487: <li><a href="errata38.html#sendmail">Mar 25, 2006:
488: A race condition has been reported to exist in the handling by sendmail
489: of asynchronous signals.</a>
490: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 491: Josh Bressers has reported a weakness in OpenSSH caused due to the
492: insecure use of the system(3) function in scp(1) when performing copy
493: operations using filenames that are supplied by the user from the
494: command line.</a>
1.321 brad 495: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 496: Do not allow users to trick suid programs into re-opening files via
497: /dev/fd.</a>
1.321 brad 498: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 499: A buffer overflow has been found in the Perl interpreter with the
500: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 501: </ul>
502:
503: <li>
1.312 david 504: <a name="37"></a>
505:
506: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
507: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 508: in <a href="anoncvs.html">OpenBSD current</a>. The
509: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
510: you should update your machine.
1.312 david 511:
512: <p>
513: <ul>
1.322 brad 514: <li><a href="errata37.html#xorg">May 2, 2006:
515: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 516: <li><a href="errata37.html#sendmail">Mar 25, 2006:
517: A race condition has been reported to exist in the handling by sendmail
518: of asynchronous signals.</a>
1.320 brad 519: <li><a href="errata37.html#ssh">Feb 12, 2006:
520: Josh Bressers has reported a weakness in OpenSSH caused due to the
521: insecure use of the system(3) function in scp(1) when performing copy
522: operations using filenames that are supplied by the user from the
523: command line.</a>
1.319 brad 524: <li><a href="errata37.html#fd">Jan 5, 2006:
525: Do not allow users to trick suid programs into re-opening files via
526: /dev/fd.</a>
527: <li><a href="errata37.html#perl">Jan 5, 2006:
528: A buffer overflow has been found in the Perl interpreter with the
529: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 530: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 531: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 532: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 533: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 534: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 535: Fix a race condition in sudo(8) that could allow a user
1.315 millert 536: to run arbitrary commands.</a>
1.318 deraadt 537: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 538: Fix a buffer overflow, memory leaks, and NULL pointer
539: dereference in cvs(1).</a>
1.312 david 540: </ul>
541:
542: <li>
1.301 miod 543: <a name="36"></a>
544:
545: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
546: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 547: in <a href="anoncvs.html">OpenBSD current</a>. The
548: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
549: you should update your machine.
1.301 miod 550:
551: <p>
1.302 markus 552: <ul>
1.317 millert 553: <li><a href="errata36.html#libz2">Jul 21, 2005:
554: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 555: <li><a href="errata36.html#libz">Jul 6, 2005:
556: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 557: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 558: Fix a race condition in sudo(8) that could allow a user
1.315 millert 559: to run arbitrary commands.</a>
1.311 deraadt 560: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 561: Fix a buffer overflow, memory leaks, and NULL pointer
562: dereference in cvs(1).</a>
1.311 deraadt 563: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 564: Due to buffer overflows in telnet(1), a malicious
565: server or man-in-the-middle attack could allow
566: execution of arbitrary code with the privileges of
567: the user invoking telnet(1).</a>
1.311 deraadt 568: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 569: More stringent checking should be done in the copy(9)
570: functions to prevent their misuse.</a>
1.311 deraadt 571: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 572: More stringent checking should be done in the copy(9)
573: functions to prevent their misuse.</a>
1.311 deraadt 574: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 575: httpd(8)'s mod_include module fails to properly validate
576: the length of user supplied tag strings prior to copying
1.305 brad 577: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 578: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 579: On systems running isakmpd(8) it is possible for a local
580: user to cause kernel memory corruption and system panic by
1.303 markus 581: setting ipsec(4) credentials on a socket.</a>
1.302 markus 582: </ul>
1.301 miod 583:
584: <li>
1.288 matthieu 585: <a name="35"></a>
1.279 deraadt 586:
1.294 david 587: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 588: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 589: in <a href="anoncvs.html">OpenBSD current</a>. The
590: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
591: you should update your machine.
1.279 deraadt 592:
593: <p>
594: <ul>
1.310 brad 595: <li><a href="errata35.html#cvs4">Apr 28, 2005:
596: Fix a buffer overflow, memory leaks, and NULL pointer
597: dereference in cvs(1).</a>
1.309 brad 598: <li><a href="errata35.html#telnet">Mar 30, 2005:
599: Due to buffer overflows in telnet(1), a malicious
600: server or man-in-the-middle attack could allow
601: execution of arbitrary code with the privileges of
602: the user invoking telnet(1).</a>
1.308 brad 603: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 604: More stringent checking should be done in the copy(9)
605: functions to prevent their misuse.</a>
1.306 brad 606: <li><a href="errata35.html#locore">Feb 28, 2005:
607: More stringent checking should be done in the copy(9)
608: functions to prevent their misuse.</a>
1.304 brad 609: <li><a href="errata35.html#httpd3">Jan 12, 2005:
610: httpd(8)'s mod_include module fails to properly validate
611: the length of user supplied tag strings prior to copying
1.305 brad 612: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 613: <li><a href="errata35.html#pfkey">Dec 14, 2004:
614: On systems running isakmpd(8) it is possible for a local
615: user to cause kernel memory corruption and system panic by
1.303 markus 616: setting ipsec(4) credentials on a socket.</a>
1.301 miod 617: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 618: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 619: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 620: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 621: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 622: httpd(8)'s mod_rewrite module can be made to write one zero byte in
623: an arbitrary memory position outside of a char array, causing a DoS
624: or possibly buffer overflows.</a>
1.301 miod 625: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 626: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 627: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 628: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 629: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 630: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 631: Multiple remote vulnerabilities have been found in the cvs(1)
632: server which can be used by CVS clients to crash or execute
1.293 brad 633: arbitrary code on the server.</a>
1.301 miod 634: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 635: kdc(8) performs inadequate checking of request fields, leading
636: to the possibility of principal impersonation from other
637: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 638: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 639: xdm(1) ignores the requestPort resource and creates a
1.293 brad 640: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 641: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 642: A buffer overflow in the cvs(1) server has been found,
643: which can be used by CVS clients to execute arbitrary code on
1.293 brad 644: the server.</a>
1.301 miod 645: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 646: Integer overflow problems were found in procfs, allowing
1.293 brad 647: reading of arbitrary kernel memory.</a>
1.301 miod 648: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 649: Pathname validation problems have been found in cvs(1),
650: allowing clients and servers access to files outside the
1.293 brad 651: repository or local CVS tree.</a>
1.279 deraadt 652: </ul>
653:
654: <p>
655: <li>
1.288 matthieu 656: <a name="34"></a>
1.261 david 657:
1.294 david 658: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 659: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 660: in <a href="anoncvs.html">OpenBSD current</a>. The
661: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
662: you should update your machine.
1.261 david 663: <p>
664: <ul>
1.302 markus 665: <li><a href="errata34.html#pfkey">Dec 14, 2004:
666: On systems running isakmpd(8) it is possible for a local
667: user to cause kernel memory corruption and system panic by
1.303 markus 668: setting ipsec(4) credentials on a socket.</a>
1.298 brad 669: <li><a href="errata34.html#xpm">Sep 16, 2004:
670: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 671: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
672: httpd(8)'s mod_rewrite module can be made to write one zero byte in
673: an arbitrary memory position outside of a char array, causing a DoS
674: or possibly buffer overflows.</a>
1.294 david 675: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 676: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 677: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 678: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 679: an attacker can delete IPsec tunnels at will.</a>
1.294 david 680: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 681: Multiple remote vulnerabilities have been found in the cvs(1)
682: server which can be used by CVS clients to crash or execute
1.293 brad 683: arbitrary code on the server.</a>
1.294 david 684: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 685: kdc(8) performs inadequate checking of request fields, leading
686: to the possibility of principal impersonation from other
687: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 688: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 689: A buffer overflow in the cvs(1) server has been found,
690: which can be used by CVS clients to execute arbitrary code on
691: the server.</a>
1.294 david 692: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 693: Integer overflow problems were found in procfs, allowing
694: reading of arbitrary kernel memory.</a>
1.294 david 695: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 696: Pathname validation problems have been found in cvs(1),
697: allowing clients and servers access to files outside the
698: repository or local CVS tree.</a>
1.294 david 699: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 700: A missing check for a NULL-pointer dereference may allow a
1.281 otto 701: remote attacker to crash applications using OpenSSL.</a>
1.294 david 702: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 703: Defects in the payload validation and processing functions of
704: isakmpd have been discovered. An attacker could send malformed
705: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 706: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 707: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
708: access module, using IP addresses without a netmask on big endian
709: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 710: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 711: An IPv6 MTU handling problem exists that could be used by an
712: attacker to cause a denial of service attack.</a>
1.294 david 713: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 714: A reference counting bug in shmat(2) could be used to write to
715: kernel memory under certain circumstances.</a>
1.294 david 716: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 717: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 718: by Thomas Walpuski.</a>
1.294 david 719: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 720: It may be possible for a local user to overrun the stack in
721: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 722: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 723: The use of certain ASN.1 encodings or malformed public keys may
724: allow an attacker to mount a denial of service attack against
725: applications linked with ssl(3).</a>
1.261 david 726: </ul>
727:
728: <li>
1.288 matthieu 729: <a name="33"></a>
1.246 deraadt 730:
1.294 david 731: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 732: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 733: in <a href="anoncvs.html">OpenBSD current</a>. The
734: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 735: you should update your machine.
1.246 deraadt 736: <p>
737: <ul>
1.294 david 738: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 739: Pathname validation problems have been found in cvs(1),
740: allowing clients and servers access to files outside the
741: repository or local CVS tree.</a>
1.294 david 742: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 743: A missing check for a NULL-pointer dereference may allow a
1.281 otto 744: remote attacker to crash applications using OpenSSL.</a>
1.294 david 745: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 746: Defects in the payload validation and processing functions of
747: isakmpd have been discovered. An attacker could send malformed
748: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 749: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 750: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
751: access module, using IP addresses without a netmask on big endian
752: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 753: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 754: An IPv6 MTU handling problem exists that could be used by an
755: attacker to cause a denial of service attack.</a>
1.294 david 756: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 757: A reference counting bug in shmat(2) could be used to write to
758: kernel memory under certain circumstances.</a>
1.294 david 759: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 760: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 761: by Thomas Walpuski.</a>
1.294 david 762: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 763: It may be possible for a local user to execute arbitrary code
764: resulting in escalation of privileges due to a stack overrun
765: in compat_ibcs2(8).</a>
1.294 david 766: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 767: The use of certain ASN.1 encodings or malformed public keys may
768: allow an attacker to mount a denial of service attack against
769: applications linked with ssl(3).</a>
1.294 david 770: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 771: Access of freed memory in pf(4) could be used to
1.260 margarid 772: remotely panic a machine using scrub rules.</a>
1.294 david 773: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 774: A buffer overflow in the address parsing in
775: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 776: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 777: OpenSSH versions prior to 3.7 contains a buffer management error
778: that is potentially exploitable.</a>
1.294 david 779: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 780: Root may be able to reduce the security level by taking advantage of
781: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 782: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 783: An improper bounds check in the kernel may allow a local user
784: to panic the kernel.</a>
1.294 david 785: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 786: An off-by-one error exists in the C library function realpath(3)
787: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 788: </ul>
789:
1.265 miod 790:
1.247 david 791: <p>
1.246 deraadt 792: <li>
1.288 matthieu 793: <a name="32"></a>
1.224 deraadt 794:
1.294 david 795: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 796: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 797: in <a href="anoncvs.html">OpenBSD current</a>. The
798: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 799: you should update your machine.
1.224 deraadt 800: <p>
801: <ul>
1.294 david 802: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 803: The use of certain ASN.1 encodings or malformed public keys may
804: allow an attacker to mount a denial of service attack against
805: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 806: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 807: Access of freed memory in pf(4) could be used to
1.260 margarid 808: remotely panic a machine using scrub rules.</a>
1.294 david 809: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 810: A buffer overflow in the address parsing in
811: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 812: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 813: OpenSSH versions prior to 3.7 contains a buffer management error
814: that is potentially exploitable.</a>
1.294 david 815: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 816: Fix for a potential security issue in
817: sendmail(8) with respect to DNS maps.</a>
1.294 david 818: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 819: An off-by-one error exists in the C library function realpath(3)
820: may allow an attacker to gain escalated privileges.</a>
1.294 david 821: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 822: A buffer overflow in the address parsing in
823: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 824: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 825: A cryptographic weaknesses in the Kerberos v4 protocol can be
826: exploited on Kerberos v5 as well.</a>
1.294 david 827: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 828: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 829: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 830: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 831: Various SSL and TLS operations in OpenSSL are vulnerable to
832: timing attacks.</a>
1.294 david 833: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 834: A buffer overflow in lprm(1) may allow an attacker to elevate
835: privileges to user daemon.</a>.
1.294 david 836: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 837: A buffer overflow in the envelope comments processing in
838: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 839: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 840: httpd(8) leaks file inode numbers via ETag header as well as
841: child PIDs in multipart MIME boundary generation. This could
842: lead, for example, to NFS exploitation because it uses inode
843: numbers as part of the file handle.</a>
1.294 david 844: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 845: In ssl(8) an information leak can occur via timing by performing
846: a MAC computation even if incorrect block cipher padding has
847: been found, this is a countermeasure. Also, check for negative
848: sizes, in allocation routines.</a>
1.294 david 849: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 850: A double free exists in cvs(1) that could lead to privilege
851: escalation for cvs configurations where the cvs command is
1.233 margarid 852: run as a privileged user.</a>
1.294 david 853: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 854: A buffer overflow exists in named(8) that could lead to a
855: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 856: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 857: A logic error in the pool kernel memory allocator could cause
858: memory corruption in low-memory situations, causing the system
859: to crash.</a>
1.294 david 860: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 861: An attacker can bypass smrsh(8)'s restrictions and execute
862: arbitrary commands with the privileges of his own account.</a>
1.294 david 863: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 864: Network bridges running pf with scrubbing enabled could cause
865: mbuf corruption, causing the system to crash.</a>
1.294 david 866: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 867: A buffer overflow can occur in the kadmind(8) daemon, leading
868: to possible remote crash or exploit.</a>
1.224 deraadt 869: </ul>
870:
1.227 miod 871: <p>
872: <li>
1.288 matthieu 873: <a name="31"></a>
1.203 deraadt 874:
1.294 david 875: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 876: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 877: in <a href="anoncvs.html">OpenBSD current</a>. The
878: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 879: you should update your machine.
1.203 deraadt 880:
881: <p>
882: <ul>
1.294 david 883: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 884: A buffer overflow in the address parsing in
885: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 886: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 887: A cryptographic weaknesses in the Kerberos v4 protocol can be
888: exploited on Kerberos v5 as well.</a>
1.294 david 889: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 890: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 891: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 892: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 893: Various SSL and TLS operations in OpenSSL are vulnerable to
894: timing attacks.</a>
1.294 david 895: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 896: A buffer overflow in lprm(1) may allow an attacker to gain
897: root privileges.</a>
1.294 david 898: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 899: A buffer overflow in the envelope comments processing in
900: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 901: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 902: In ssl(8) an information leak can occur via timing by performing
903: a MAC computation even if incorrect block cipher padding has
904: been found, this is a countermeasure. Also, check for negative
905: sizes, in allocation routines.</a>
1.294 david 906: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 907: A double free exists in cvs(1) that could lead to privilege
908: escalation for cvs configurations where the cvs command is
1.294 david 909: run as a privileged user</a>.
910: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 911: A buffer overflow exists in named(8) that could lead to a
912: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 913: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 914: Incorrect argument checking in the getitimer(2) system call
915: may allow an attacker to crash the system.</a>
1.294 david 916: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 917: An attacker can bypass smrsh(8)'s restrictions and execute
918: arbitrary commands with the privileges of his own account.</a>
1.294 david 919: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 920: A buffer overflow can occur in the kadmind(8) daemon, leading
921: to possible remote crash or exploit.</a>
1.294 david 922: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 923: Incorrect argument checking in the setitimer(2) system call
924: may allow an attacker to write to kernel memory.</a>
1.294 david 925: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 926: An insufficient boundary check in the select system call
1.220 miod 927: allows an attacker to overwrite kernel memory and execute arbitrary code
928: in kernel context.</a>
1.294 david 929: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 930: Several remote buffer overflows can occur in the SSL2 server and SSL3
931: client of the ssl(8) library, as in the ASN.1 parser code in the
932: crypto(3) library, all of them being potentially remotely
933: exploitable.</a>
1.294 david 934: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 935: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
936: possible remote crash.</a>
1.294 david 937: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 938: A race condition exists in the pppd(8) daemon which may cause it to
939: alter the file permissions of an arbitrary file.</a>
1.294 david 940: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 941: Receiving IKE payloads out of sequence can cause isakmpd(8) to
942: crash.</a>
1.294 david 943: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 944: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 945: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 946: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 947: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 948: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 949: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 950: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 951: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 952: input validation error that can result in an integer overflow and
953: privilege escalation.</a>
1.294 david 954: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 955: A buffer overflow can occur during the interpretation of chunked
956: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 957: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 958: Under certain conditions, on systems using YP with netgroups
959: in the password database, it is possible that sshd(8) does
960: ACL checks for the requested user name but uses the password
961: database entry of a different user for authentication. This
962: means that denied users might authenticate successfully
963: while permitted users could be locked out.</a>
1.294 david 964: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 965: A race condition exists that could defeat the kernel's
966: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 967: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 968: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 969: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 970: A local user can gain super-user privileges due to a buffer
971: overflow in sshd(8) if AFS has been configured on the system
972: or if KerberosTgtPassing or AFSTokenPassing has been enabled
973: in the sshd_config file.</a>
1.203 deraadt 974: </ul>
975:
1.235 miod 976: <p>
1.203 deraadt 977: <li>
1.288 matthieu 978: <a name="30"></a>
1.187 deraadt 979:
1.294 david 980: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 981: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 982: in <a href="anoncvs.html">OpenBSD current</a>. The
983: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 984: you should update your machine.
1.187 deraadt 985:
986: <p>
987: <ul>
1.294 david 988: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 989: A buffer overflow exists in named(8) that could lead to a
990: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 991: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 992: Incorrect argument checking in the getitimer(2) system call
993: may allow an attacker to crash the system.</a>
1.294 david 994: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 995: An attacker can bypass smrsh(8)'s restrictions and execute
996: arbitrary commands with the privileges of his own account.</a>
1.294 david 997: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 998: A buffer overflow can occur in the kadmind(8) daemon, leading
999: to possible remote crash or exploit.</a>
1.294 david 1000: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1001: Incorrect argument checking in the setitimer(2) system call
1002: may allow an attacker to write to kernel memory.</a>
1.294 david 1003: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1004: An insufficient boundary check in the select and poll system calls
1005: allows an attacker to overwrite kernel memory and execute arbitrary code
1006: in kernel context.</a>
1.294 david 1007: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1008: Several remote buffer overflows can occur in the SSL2 server and SSL3
1009: client of the ssl(8) library, as in the ASN.1 parser code in the
1010: crypto(3) library, all of them being potentially remotely
1011: exploitable.</a>
1.294 david 1012: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1013: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1014: possible remote crash.</a>
1.294 david 1015: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1016: A race condition exists in the pppd(8) daemon which may cause it to
1017: alter the file permissions of an arbitrary file.</a>
1.294 david 1018: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1019: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1020: crash.</a>
1.294 david 1021: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1022: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1023: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1024: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1025: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1026: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1027: input validation error that can result in an integer overflow and
1028: privilege escalation.</a>
1.294 david 1029: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1030: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1031: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1032: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1033: A buffer overflow can occur during the interpretation of chunked
1034: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1035: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1036: A race condition exists that could defeat the kernel's
1037: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1038: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1039: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1040: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1041: A local user can gain super-user privileges due to a buffer
1042: overflow in sshd(8) if AFS has been configured on the system
1043: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1044: in the sshd_config file.</a>
1.294 david 1045: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1046: The mail(1) was interpreting tilde escapes even when invoked
1047: in non-interactive mode. As mail(1) is called as root from cron,
1048: this can lead to a local root compromise.</a>
1.294 david 1049: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1050: Under certain conditions, on systems using YP with netgroups in
1051: the password database, it is possible for the rexecd(8) and rshd(8)
1052: daemons to execute a shell from a password database entry for a
1053: different user. Similarly, atrun(8) may change to the wrong
1054: home directory when running jobs.</a>
1.294 david 1055: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1056: A potential double free() exists in the zlib library;
1057: this is not exploitable on OpenBSD.
1058: The kernel also contains a copy of zlib; it is not
1059: currently known if the kernel zlib is exploitable.</a>
1.294 david 1060: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1061: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1062: may allow a local user to gain super-user privileges.</a>
1.294 david 1063: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1064: A race condition between the ptrace(2) and execve(2) system calls
1065: allows an attacker to modify the memory contents of suid/sgid
1066: processes which could lead to compromise of the super-user account.</a>
1.294 david 1067: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1068: There is a security hole in sudo(8) that can be exploited
1069: when the Postfix sendmail replacement is installed that may
1070: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1071: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1072: An attacker can trick a machine running the lpd daemon into
1073: creating new files in the root directory from a machine with
1074: remote line printer access.</a>
1.294 david 1075: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1076: The vi.recover script can be abused in such a way as
1077: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1078: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1079: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1080: resulting in a crash.</a>
1.294 david 1081: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1082: A security hole that may allow an attacker to partially authenticate
1083: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1084: </ul>
1085:
1086: <p>
1087: <li>
1.288 matthieu 1088: <a name="29"></a>
1.173 deraadt 1089:
1.294 david 1090: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1091: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1092: in <a href="anoncvs.html">OpenBSD current</a>. The
1093: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1094: you should update your machine.
1095:
1.173 deraadt 1096:
1097: <p>
1098: <ul>
1.294 david 1099: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1100: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1101: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1102: A race condition exists that could defeat the kernel's
1103: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1104: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1105: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1106: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1107: A local user can gain super-user privileges due to a buffer
1108: overflow in sshd(8) if AFS has been configured on the system
1109: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1110: in the sshd_config file.</a>
1.294 david 1111: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1112: The mail(1) was interpreting tilde escapes even when invoked
1113: in non-interactive mode. As mail(1) is called as root from cron,
1114: this can lead to a local root compromise.</a>
1.294 david 1115: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1116: A potential double free() exists in the zlib library;
1117: this is not exploitable on OpenBSD.
1118: The kernel also contains a copy of zlib; it is not
1119: currently known if the kernel zlib is exploitable.</a>
1.294 david 1120: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1121: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1122: may allow a local user to gain super-user privileges.</a>
1.294 david 1123: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1124: A race condition between the ptrace(2) and execve(2) system calls
1125: allows an attacker to modify the memory contents of suid/sgid
1126: processes which could lead to compromise of the super-user account.</a>
1.294 david 1127: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1128: There is a security hole in sudo(8) that can be exploited
1129: when the Postfix sendmail replacement is installed that may
1130: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1131: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1132: An attacker can trick a machine running the lpd daemon into
1133: creating new files in the root directory from a machine with
1134: remote line printer access.</a>
1.294 david 1135: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1136: The vi.recover script can be abused in such a way as
1137: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1138: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1139: A security hole exists in uuxqt(8) that may allow an
1140: attacker to gain root privileges.</a>
1.294 david 1141: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1142: A security hole exists in lpd(8) that may allow an
1143: attacker to gain root privileges if lpd is running.</a>
1.294 david 1144: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1145: A security hole exists in sendmail(8) that may allow an
1146: attacker on the local host to gain root privileges.</a>
1.294 david 1147: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1148: A kernel buffer overflow in the NFS code can be used to execute
1149: arbitrary code by users with mount privileges (only root by
1.181 millert 1150: default).</a>
1.294 david 1151: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1152: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1153: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1154: sshd(8) allows users to delete arbitrary files named "cookies"
1155: if X11 forwarding is enabled. X11 forwarding is disabled
1156: by default.</a>
1.294 david 1157: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1158: Programs using the fts routines can be tricked into changing
1159: into the wrong directory.</a>
1.294 david 1160: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1161: Sendmail signal handlers contain unsafe code,
1162: leading to numerous race conditions.</a>
1.173 deraadt 1163: </ul>
1164:
1165: <p>
1166: <li>
1.288 matthieu 1167: <a name="28"></a>
1.152 deraadt 1168:
1.294 david 1169: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1170: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1171: in <a href="anoncvs.html">OpenBSD current</a>. The
1172: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1173: you should update your machine.
1174:
1.152 deraadt 1175:
1176: <p>
1177: <ul>
1.294 david 1178: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1179: A security hole exists in uuxqt(8) that may allow an
1180: attacker to gain root privileges.</a>
1.294 david 1181: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1182: A security hole exists in lpd(8) that may allow an
1183: attacker to gain root privileges if lpd is running.</a>
1.294 david 1184: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1185: A security hole exists in sendmail(8) that may allow an
1186: attacker on the local host to gain root privileges.</a>
1.294 david 1187: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1188: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1189: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1190: Programs using the fts routines can be tricked into changing
1191: into the wrong directory.</a>
1.294 david 1192: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1193: Sendmail signal handlers contain unsafe code,
1194: leading to numerous race conditions.</a>
1.294 david 1195: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1196: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1197: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1198: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1199: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1200: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1201: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1202: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1203: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1204: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1205: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1206: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1207: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1208: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1209: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1210: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1211: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1212: rnd(4) did not use all of its input when written to.</a>
1.294 david 1213: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1214: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1215: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1216: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1217: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1218: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1219: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1220: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1221: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1222: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1223: </ul>
1224:
1225: <p>
1226: <li>
1.288 matthieu 1227: <a name="27"></a>
1.124 deraadt 1228:
1.294 david 1229: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1230: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1231: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1232: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1233:
1234: <p>
1235: <ul>
1.294 david 1236: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1237: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1238: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1239: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1240: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1241: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1242: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1243: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1244: (patch included)</a>
1.294 david 1245: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1246: X11 libraries have 2 potential overflows in xtrans code.
1247: (patch included)</a>
1.294 david 1248: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1249: Apache mod_rewrite and mod_vhost_alias modules could expose files
1250: on the server in certain configurations if used.
1251: (patch included)</a>
1.294 david 1252: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1253: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1254: TERMPATH and TERMCAP environment variables as it should.
1255: (patch included)</a>
1.294 david 1256: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1257: There are printf-style format string bugs in several privileged
1258: programs. (patch included)</a>
1.294 david 1259: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1260: libcurses honored terminal descriptions in the $HOME/.terminfo
1261: directory as well as in the TERMCAP environment variable for
1262: setuid and setgid applications.
1.146 deraadt 1263: (patch included)</a>
1.294 david 1264: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1265: A format string vulnerability exists in talkd(8).
1266: (patch included)</a>
1.294 david 1267: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1268: A format string vulnerability exists in the pw_error() function of the
1269: libutil library, yielding localhost root through chpass(1).
1270: (patch included)</a>
1.294 david 1271: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1272: Bad ESP/AH packets could cause a crash under certain conditions.
1273: (patch included)</a>
1.294 david 1274: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1275: A format string vulnerability (localhost root) exists in xlock(1).
1276: (patch included)</a>
1.294 david 1277: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1278: Various bugs found in X11 libraries have various side effects, almost
1279: completely denial of service in OpenBSD.
1280: (patch included)</a>
1.294 david 1281: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1282: Just like pretty much all the other unix ftp daemons
1283: on the planet, ftpd had a remote root hole in it.
1284: Luckily, ftpd was not enabled by default.
1.137 deraadt 1285: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1286: (patch included)</a>
1.294 david 1287: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1288: Mopd, very rarely used, contained some buffer overflows.
1289: (patch included)</a>
1.294 david 1290: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1291: libedit would check for a <b>.editrc</b> file in the current
1292: directory. Not known to be a real security issue, but a patch
1293: is available anyways.
1294: (patch included)</a>
1.294 david 1295: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1296: A serious bug in dhclient(8) could allow strings from a
1297: malicious dhcp server to be executed in the shell as root.
1298: (patch included)</a>
1.294 david 1299: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1300: A serious bug in isakmpd(8) policy handling wherein
1301: policy verification could be completely bypassed in isakmpd.
1302: (patch included)</a>
1.294 david 1303: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1304: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1305: should not be used, and results in security problems on
1306: other operating systems.</a>
1.294 david 1307: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1308: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1309: (patch included)</a>
1.294 david 1310: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1311: Improper use of ipf <i>keep-state</i> rules can result
1312: in firewall rules being bypassed. (patch included)</a>
1313:
1.124 deraadt 1314: </ul>
1315:
1316: <p>
1317: <li>
1.288 matthieu 1318: <a name="26"></a>
1.119 deraadt 1319:
1.294 david 1320: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1321: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1322: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1323: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1324:
1325: <p>
1326: <ul>
1.294 david 1327: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1328: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1329: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1330: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1331: Improper use of ipf <i>keep-state</i> rules can result
1332: in firewall rules being bypassed. (patch included)</a>
1.294 david 1333: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1334: xlockmore has a bug which a localhost attacker can use to gain
1335: access to the encrypted root password hash (which is normally
1.245 miod 1336: encoded using blowfish</a> (see
1.294 david 1337: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1338: crypt(3)</a>)
1.245 miod 1339: (patch included).
1.294 david 1340: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1341: Systems running with procfs enabled and mounted are
1342: vulnerable to a very tricky exploit. procfs is not
1343: mounted by default.
1344: (patch included).</a>
1.294 david 1345: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1346: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1347: thus exposing the system to a race where the aliases file
1348: did not exist.
1.119 deraadt 1349: (patch included).</a>
1.294 david 1350: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1351: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1352: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1353: A buffer overflow in the RSAREF code included in the
1354: USA version of libssl, is possibly exploitable in
1355: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1356: (patch included).<br></a>
1357: <strong>Update:</strong> Turns out that this was not exploitable
1358: in any of the software included in OpenBSD 2.6.
1.294 david 1359: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1360: Any user could change interface media configurations, resulting in
1361: a localhost denial of service attack.
1.121 deraadt 1362: (patch included).</a>
1.119 deraadt 1363: </ul>
1364:
1365: <p>
1366: <li>
1.288 matthieu 1367: <a name="25"></a>
1.106 deraadt 1368:
1.294 david 1369: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1370: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1371: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1372: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1373:
1.96 deraadt 1374: <p>
1.104 deraadt 1375: <ul>
1.294 david 1376: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1377: In cron(8), make sure argv[] is NULL terminated in the
1378: fake popen() and run sendmail as the user, not as root.
1379: (patch included).</a>
1.294 david 1380: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1381: filesystems had an overrun in their handling of uio_offset
1382: in their readdir() routines. (These filesystems are not
1383: enabled by default). (patch included).</a>
1.294 david 1384: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1385: when we execve() a new process. (patch included).</a>
1.294 david 1386: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1387: been handled by IPsec may be transmitted as cleartext.
1388: PF_KEY SA expirations may leak kernel resources.
1389: (patch included).</a>
1.294 david 1390: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1391: motd re-writing and change the find(1) to use -execdir
1392: (patch included).</a>
1.294 david 1393: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1394: users to chflags(2) or fchflags(2) on character or block devices
1395: which they may currently be the owner of (patch included).</a>
1.294 david 1396: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1397: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1398: </ul>
1399:
1.106 deraadt 1400: <p>
1401: <li>
1.288 matthieu 1402: <a name="24"></a>
1.235 miod 1403:
1.294 david 1404: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1405: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1406: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1407: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1408:
1.96 deraadt 1409: <p>
1.75 deraadt 1410: <ul>
1.294 david 1411: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1412: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1413: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1414: another kernel crash case caused by the <strong>crashme</strong>
1415: program (patch included).</a>
1.294 david 1416: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1417: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1418: (patch included).</a>
1.294 david 1419: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1420: existed in ping(8). (patch included).</a>
1.294 david 1421: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1422: the ipq, which could permit an attacker to cause a crash.
1423: (patch included).</a>
1.294 david 1424: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1425: kernel between accept(2) and select(2) could permit an attacker
1426: to hang sockets from remote.
1427: (patch included).</a>
1.294 david 1428: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1429: bog the machine excessively and cause problems.
1430: (patch included).</a>
1.294 david 1431: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1432: DDB interacted to possibly cause a crash.
1433: (patch included).</a>
1.294 david 1434: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1435: (patch included).</a>
1.294 david 1436: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1437: problem in bootpd(8). (patch included).</a>
1.294 david 1438: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1439: exploitable problem relating to environment variables in termcap
1440: and curses. (patch included).</a>
1.294 david 1441: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1442: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1443: </ul>
1444:
1.106 deraadt 1445: <p>
1446: <li>
1.288 matthieu 1447: <a name="23"></a>
1.235 miod 1448:
1.294 david 1449: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1450: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1451: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1452: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1453:
1.96 deraadt 1454: <p>
1.53 matthieu 1455: <ul>
1.294 david 1456: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1457: problem in bootpd(8). (patch included).</a>
1.294 david 1458: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1459: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1460: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1461: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1462: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1463: chpass(1) has a file descriptor leak which allows an
1464: attacker to modify /etc/master.passwd.</a>
1.294 david 1465: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1466: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1467: should not be executed with fd slots 0, 1, or 2 free.
1468: (patch included).</a>
1.294 david 1469: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1470: libraries (patches included).</a>
1.294 david 1471: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1472: processes too permissive (4th revision patch included).</a>
1.294 david 1473: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1474: of immutable and append-only file flags. (patch included).</a>
1.294 david 1475: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1476: if IPSEC is enabled (patch included).</a>
1.294 david 1477: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1478: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1479: </ul>
1.9 deraadt 1480:
1.106 deraadt 1481: <p>
1482: <li>
1.288 matthieu 1483: <a name="22"></a>
1.235 miod 1484:
1.294 david 1485: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1486: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1487: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1488: still exist in other operating systems. (The supplied patches are for
1489: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1490:
1.96 deraadt 1491: <p>
1.9 deraadt 1492: <ul>
1.294 david 1493: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1494: packets if IPSEC is enabled (patch included).</a>
1.294 david 1495: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1496: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1497: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1498: (patch included).</a>
1.294 david 1499: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1500: (patch included).</a>
1.294 david 1501: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1502: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1503: (patch included).</a>
1.294 david 1504: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1505: export (patch included).</a>
1.112 philen 1506: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1507: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1508: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1509: Acceptance.</a>
1.294 david 1510: A patch is available <a href="errata22.html#sourceroute">here</a>.
1511: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1512: flaw (patch included).</a>
1.294 david 1513: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1514: </ul>
1515:
1.106 deraadt 1516: <p>
1517: <li>
1.288 matthieu 1518: <a name="21"></a>
1.235 miod 1519:
1.294 david 1520: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1521: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1522: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1523: exist in other operating systems. (If you are running OpenBSD 2.1, we
1524: would strongly recommend an upgrade to the newest release, as this
1525: patch list only attempts at fixing the most important security
1526: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1527: security problems. Many of those problems were solved in ways which
1528: make it hard for us to provide patches).
1529:
1.96 deraadt 1530: <p>
1.52 deraadt 1531: <ul>
1.112 philen 1532: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1533: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1534: (patch included)</a>
1.112 philen 1535: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1536: </ul>
1.51 deraadt 1537:
1.106 deraadt 1538: <p>
1539: <li>
1.288 matthieu 1540: <a name="20"></a>
1.235 miod 1541:
1.294 david 1542: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1543: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1544: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1545: exist in other operating systems. (If you are running OpenBSD 2.0, we
1546: commend you for being there back in the old days!, but you're really
1547: missing out if you don't install a new version!)
1548:
1549: <p>
1550: <ul>
1.112 philen 1551: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1552: resolver (patch included)</a>
1553: <li>Many others... if people can hunt them down, please let me know
1554: and we'll put them up here.
1555: </ul>
1.51 deraadt 1556: <p>
1.106 deraadt 1557:
1.288 matthieu 1558: <a name="watching"></a>
1.294 david 1559: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1560:
1.21 deraadt 1561: Since we take a proactive stance with security, we are continually
1562: finding and fixing new security problems. Not all of these problems
1.80 espie 1563: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1564: confirmed to be exploitable; many simple bugs we fix do turn out to
1565: have security consequences we could not predict. We do not have the
1566: time resources to make these changes available in the above format.<p>
1.21 deraadt 1567:
1568: Thus there are usually minor security fixes in the current source code
1569: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1570: guarantee that these problems are of minimal impact and unproven
1.44 ian 1571: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1572: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1573:
1.45 deraadt 1574: People who are really concerned with security can do a number of
1575: things:<p>
1.21 deraadt 1576:
1577: <ul>
1578: <li>If you understand security issues, watch our
1.294 david 1579: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1580: eye out for things which appear security related. Since
1.21 deraadt 1581: exploitability is not proven for many of the fixes we make,
1582: do not expect the relevant commit message to say "SECURITY FIX!".
1583: If a problem is proven and serious, a patch will be available
1584: here very shortly after.
1.161 horacio 1585: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1586: security-announce mailing list</a> which will notify you for every
1.186 ian 1587: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1588: and instruct you on how to patch the problem.
1.21 deraadt 1589: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1590: complete system build from time to time (read /usr/src/Makefile
1591: carefully). Users can make the assumption that the current
1592: source tree always has stronger security than the previous release.
1.45 deraadt 1593: However, building your own system from source code is not trivial;
1.265 miod 1594: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1595: transition between major releases.
1.115 ericj 1596: <li>Install a binary snapshot for your
1.80 espie 1597: architecture, which are made available fairly often. For
1.29 deraadt 1598: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1599: </ul>
1600:
1.9 deraadt 1601: <p>
1.288 matthieu 1602: <a name="reporting"></a>
1.294 david 1603: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1604:
1.5 deraadt 1605: <p> If you find a new security problem, you can mail it to
1.294 david 1606: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1607: <br>
1.5 deraadt 1608: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1609: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1610:
1.107 deraadt 1611: <p>
1.288 matthieu 1612: <a name="papers"></a>
1.294 david 1613: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1614:
1615: A number of papers have been written by OpenBSD team members, about security
1616: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1617: documents are available as follows.<p>
1.107 deraadt 1618:
1619: <ul>
1.113 deraadt 1620: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1621: <a href="events.html#usenix99">Usenix 1999</a>,
1622: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1623: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1624: <a href="papers/bcrypt-paper.ps">paper</a> and
1625: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1626: <p>
1627: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1628: <a href="events.html#usenix99">Usenix 1999</a>,
1629: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1630: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1631: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1632: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1633: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1634: <a href="papers/crypt-paper.ps">paper</a> and
1635: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1636: <p>
1637: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1638: <a href="events.html#usenix99">Usenix 1999</a>,
1639: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1640: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1641: <a href="papers/strlcpy-paper.ps">paper</a> and
1642: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1643: <p>
1.118 deraadt 1644: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1645: <a href="events.html#lisa99">LISA 1999</a>,
1646: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1647: <a href="papers/authgw-paper.ps">paper</a> and
1648: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1649: <p>
1.153 jufi 1650: <li>Encrypting Virtual Memory<br>
1.294 david 1651: <a href="events.html#sec2000">Usenix Security 2000</a>,
1652: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1653: <a href="papers/swapencrypt.ps">paper</a> and
1654: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1655: <p>
1.107 deraadt 1656: </ul>
1.294 david 1657: </ul>
1.106 deraadt 1658:
1.2 deraadt 1659: <hr>
1.294 david 1660: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1661: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1662: <br>
1.363 ! brad 1663: <small>$OpenBSD: security.html,v 1.362 2008/07/23 18:31:35 brad Exp $</small>
1.1 deraadt 1664:
1.24 deraadt 1665: </body>
1666: </html>
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