Annotation of www/security.html, Revision 1.365
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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.365 ! deraadt 57: <br>
1.280 david 58: <a href="#34">3.4</a>,
1.301 miod 59: <a href="#35">3.5</a>,
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 ! deraadt 67: <a href="#43">4.3</a>,
! 68: <a href="#44">4.4</a>.
1.114 philen 69: </td>
70: </tr>
71: </table>
1.56 deraadt 72: <hr>
73:
1.294 david 74: <a name="goals"></a>
1.278 deraadt 75: <ul>
1.294 david 76: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 77:
1.14 deraadt 78: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 79: ONE in the industry for security (if we are not already there). Our
80: open software development model permits us to take a more
81: uncompromising view towards increased security than Sun, SGI, IBM, HP,
82: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 83: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 84: cryptography</a>, we are able to take cryptographic approaches towards
85: fixing security problems.<p>
1.18 deraadt 86:
1.288 matthieu 87: <a name="disclosure"></a>
1.294 david 88: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 89:
1.45 deraadt 90: Like many readers of the
1.196 jufi 91: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 92: BUGTRAQ mailing list</a>,
1.106 deraadt 93: we believe in full disclosure of security problems. In the
94: operating system arena, we were probably the first to embrace
95: the concept. Many vendors, even of free software, still try
96: to hide issues from their users.<p>
97:
98: Security information moves very fast in cracker circles. On the other
99: hand, our experience is that coding and releasing of proper security
100: fixes typically requires about an hour of work -- very fast fix
101: turnaround is possible. Thus we think that full disclosure helps the
102: people who really care about security.<p>
103:
1.288 matthieu 104: <a name="process"></a>
1.294 david 105: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 106:
1.12 deraadt 107: Our security auditing team typically has between six and twelve
1.45 deraadt 108: members who continue to search for and fix new security holes. We
109: have been auditing since the summer of 1996. The process we follow to
110: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 111: every critical software component. We are not so much looking for
112: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 113: years later someone discovers the problem used to be a security
1.106 deraadt 114: issue, and we fixed it because it was just a bug, well, all the
115: better. Flaws have been found in just about every area of the system.
116: Entire new classes of security problems have been found during our
117: audit, and often source code which had been audited earlier needs
118: re-auditing with these new flaws in mind. Code often gets audited
119: multiple times, and by multiple people with different auditing
120: skills.<p>
1.12 deraadt 121:
1.94 deraadt 122: Some members of our security auditing team worked for Secure Networks,
123: the company that made the industry's premier network security scanning
124: software package Ballista (Secure Networks got purchased by Network
125: Associates, Ballista got renamed to Cybercop Scanner, and well...)
126: That company did a lot of security research, and thus fit in well
1.106 deraadt 127: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
128: colours since day 1.<p>
1.31 deraadt 129:
1.34 deraadt 130: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 131: In most cases we have found that the determination of exploitability
132: is not an issue. During our ongoing auditing process we find many
133: bugs, and endeavor to fix them even though exploitability is not
134: proven. We fix the bug, and we move on to find other bugs to fix. We
135: have fixed many simple and obvious careless programming errors in code
136: and only months later discovered that the problems were in fact
137: exploitable. (Or, more likely someone on
1.197 jufi 138: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 139: would report that other operating systems were vulnerable to a `newly
140: discovered problem', and then it would be discovered that OpenBSD had
141: been fixed in a previous release). In other cases we have been saved
142: from full exploitability of complex step-by-step attacks because we
143: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 144: managed such a success is the lpd advisory that Secure Networks put out.
145: <p>
1.29 deraadt 146:
1.288 matthieu 147: <a name="newtech"></a>
1.294 david 148: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 149:
150: As we audit source code, we often invent new ways of solving problems.
151: Sometimes these ideas have been used before in some random application
152: written somewhere, but perhaps not taken to the degree that we do.
153: <p>
154:
155: <ul>
156: <li>strlcpy() and strlcat()
157: <li>Memory protection purify
158: <ul>
159: <li>W^X
160: <li>.rodata segment
161: <li>Guard pages
162: <li>Randomized malloc()
163: <li>Randomized mmap()
164: <li>atexit() and stdio protection
165: </ul>
1.295 otto 166: <li>Privilege separation
1.278 deraadt 167: <li>Privilege revocation
168: <li>Chroot jailing
169: <li>New uids
170: <li>ProPolice
171: <li>... and others
172: </ul>
173: <p>
174:
1.294 david 175: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 176:
1.45 deraadt 177: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 178: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 179: commonplace in security forums like
1.197 jufi 180: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 181:
1.45 deraadt 182: The most intense part of our security auditing happened immediately
1.80 espie 183: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 184: over the last third of 1996 and first half of 1997. Thousands (yes,
185: thousands) of security issues were fixed rapidly over this year-long
186: period; bugs like the standard buffer overflows, protocol
187: implementation weaknesses, information gathering, and filesystem
188: races. Hence most of the security problems that we encountered were
189: fixed before our 2.1 release, and then a far smaller number needed
190: fixing for our 2.2 release. We do not find as many problems anymore,
191: it is simply a case of diminishing returns. Recently the security
192: problems we find and fix tend to be significantly more obscure or
193: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 194:
1.35 deraadt 195: <ul>
1.45 deraadt 196: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 197: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 198: to search for more complicated exploits, so we will too.
199: <li>Finding and fixing subtle flaws in complicated software is
200: a lot of fun.
1.35 deraadt 201: </ul>
1.106 deraadt 202: <p>
1.15 deraadt 203:
1.14 deraadt 204: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 205: to find and fix new security flaws.<p>
1.12 deraadt 206:
1.288 matthieu 207: <a name="default"></a>
1.294 david 208: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 209:
210: To ensure that novice users of OpenBSD do not need to become security
211: experts overnight (a viewpoint which other vendors seem to have), we
212: ship the operating system in a Secure by Default mode. All non-essential
213: services are disabled. As the user/administrator becomes more familiar
214: with the system, he will discover that he has to enable daemons and other
215: parts of the system. During the process of learning how to enable a new
216: service, the novice is more likely to learn of security considerations.<p>
217:
218: This is in stark contrast to the increasing number of systems that
219: ship with NFS, mountd, web servers, and various other services enabled
220: by default, creating instantaneous security problems for their users
221: within minutes after their first install.<p>
222:
1.288 matthieu 223: <a name="crypto"></a>
1.294 david 224: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 225:
226: And of course, since the OpenBSD project is based in Canada, it is possible
227: for us to integrate cryptography. For more information, read the page
1.116 deraadt 228: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 229:
1.294 david 230: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 231:
232: <li>
1.365 ! deraadt 233: <a name="44"></a>
! 234:
! 235: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
! 236: These are the OpenBSD 4.4 advisories -- all these problems are solved
! 237: in <a href=anoncvs.html>OpenBSD current</a> and the
! 238: <a href=stable.html>patch branch</a>.
! 239:
! 240: <p>
! 241: <ul>
! 242: <li>None yet.
! 243: </ul>
! 244:
! 245: <li>
1.357 brad 246: <a name="43"></a>
247:
248: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
249: These are the OpenBSD 4.3 advisories -- all these problems are solved
250: in <a href=anoncvs.html>OpenBSD current</a> and the
251: <a href=stable.html>patch branch</a>.
252:
253: <p>
254: <ul>
1.363 brad 255: <li><a href="errata43.html#005_ndp">October 2, 2008:
256: The Neighbor Discovery Protocol (ndp) did not correctly verify
257: neighbor solicitation requests maybe allowing a nearby attacker
258: to intercept traffic.</a>
1.362 brad 259: <li><a href="errata43.html#004_bind">July 23, 2008:
260: A vulnerability has been found with BIND.</a>
1.361 brad 261: <li><a href="errata43.html#003_xorg">July 15, 2008:
262: Multiple vulnerabilities in X.Org.</a>
1.359 brad 263: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 264: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 265: <li><a href="errata43.html#001_openssh">March 30, 2008:
266: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 267: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 268: </ul>
269:
270:
271: <li>
1.348 merdely 272: <a name="42"></a>
273:
274: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
275: These are the OpenBSD 4.2 advisories -- all these problems are solved
276: in <a href=anoncvs.html>OpenBSD current</a> and the
277: <a href=stable.html>patch branch</a>.
278:
279: <p>
280: <ul>
1.364 tobias 281: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 282: The Neighbor Discovery Protocol (ndp) did not correctly verify
283: neighbor solicitation requests maybe allowing a nearby attacker
284: to intercept traffic.</a>
1.362 brad 285: <li><a href="errata42.html#013_bind">July 23, 2008:
286: A vulnerability has been found with BIND.</a>
1.361 brad 287: <li><a href="errata42.html#012_xorg2">July 15, 2008:
288: Multiple vulnerabilities in X.Org.</a>
1.359 brad 289: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 290: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 291: <li><a href="errata42.html#010_openssh">March 30, 2008:
292: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 293: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 294: <li><a href="errata42.html#009_ppp">March 7, 2008:
295: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 296: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
297: Multiple vulnerabilities in X.Org.</a>
1.352 henning 298: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
299: A missing NULL pointer check can lead to a kernel panic.</a>
300: <li><a href="errata42.html#004_pf">Nov 27, 2007:
301: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 302: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
303: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 304: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 305: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 306: </ul>
307:
308: <li>
1.346 matthieu 309: <a name="41"></a>
310:
311: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
312: These are the OpenBSD 4.1 advisories -- all these problems are solved
313: in <a href=anoncvs.html>OpenBSD current</a> and the
314: <a href=stable.html>patch branch</a>.
315:
316: <p>
317: <ul>
1.359 brad 318: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 319: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 320: <li><a href="errata41.html#015_openssh">March 30, 2008:
321: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 322: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 323: <li><a href="errata41.html#014_ppp">March 7, 2008:
324: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 325: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
326: Multiple vulnerabilities in X.Org.</a>
327: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
328: The SSL_get_shared_ciphers() function in OpenSSL contains
329: an off-by-one overflow.</a>
1.350 deraadt 330: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 331: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 332: <li><a href="errata41.html#009_file">Jul 9, 2007:
333: Fix possible heap overflow in file(1).</a>
1.346 matthieu 334: <li><a href="errata41.html#005_route6">Apr 27, 2007:
335: IPv6 type 0 route headers can be used to mount a DoS attack
336: against hosts and networks.</a>
337: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
338: Multiple vulnerabilities in X.Org.</a>
339: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
340: Incorrect mbuf handling for ICMP6 packets.</a>
341: </ul>
342:
1.355 miod 343: <p>
344: OpenBSD 4.0 and earlier releases are not supported anymore. The following
345: paragraphs only list advisories issued while they were maintained; these
346: releases are likely to be affected by the advisories for more recent releases.
347: <br>
348:
1.346 matthieu 349: <li>
1.334 brad 350: <a name="40"></a>
351: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
352: These are the OpenBSD 4.0 advisories -- all these problems are solved
353: in <a href=anoncvs.html>OpenBSD current</a> and the
354: <a href=stable.html>patch branch</a>.
355:
356: <p>
357: <ul>
1.350 deraadt 358: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 359: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 360: <li><a href="errata40.html#015_file">Jul 9, 2007:
361: Fix possible heap overflow in file(1).</a>
1.343 deraadt 362: <li><a href="errata40.html#012_route6">Apr 23, 2007:
363: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 364: against hosts and networks.</a>
1.342 mbalmer 365: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
366: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 367: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
368: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 369: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 370: Insufficient validation in vga(4) may allow an attacker to gain
371: root privileges on some i386 systems.</a>
1.339 deraadt 372: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 373: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 374: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 375: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
376: found by Chris Evans.</a>
1.339 deraadt 377: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 378: Several problems have been found in OpenSSL.</a>
1.339 deraadt 379: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 380: httpd(8) does not sanitize the Expect header from an HTTP request
381: when it is reflected back in an error message, which might allow
382: cross-site scripting (XSS) style attacks.</a>
383: </ul>
384:
385: <li>
1.321 brad 386: <a name="39"></a>
387:
388: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
389: These are the OpenBSD 3.9 advisories -- all these problems are solved
390: in <a href=anoncvs.html>OpenBSD current</a> and the
391: <a href=stable.html>patch branch</a>.
392:
393: <p>
394: <ul>
1.343 deraadt 395: <li><a href="errata39.html#022_route6">Apr 23, 2007:
396: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 397: against hosts and networks.</a>
1.342 mbalmer 398: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
399: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 400: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
401: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 402: <li><a href="errata39.html#agp">Jan 3, 2007:
403: Insufficient validation in vga(4) may allow an attacker to gain
404: root privileges on some i386 systems.</a>
1.336 brad 405: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 406: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 407: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 408: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 409: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 410: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 411: found by Chris Evans.</a>
1.333 deraadt 412: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 413: Several problems have been found in OpenSSL.</a>
1.333 deraadt 414: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 415: httpd(8) does not sanitize the Expect header from an HTTP request
416: when it is reflected back in an error message, which might allow
417: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 418: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 419: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
420: possible for an attacker to construct an invalid signature which
421: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 422: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 423: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 424: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 425: Due to the failure to correctly validate LCP configuration option
426: lengths, it is possible for an attacker to send LCP packets via an
427: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 428: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 429: A problem in isakmpd(8) caused IPsec to run partly without replay
430: protection.</a>
1.333 deraadt 431: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 432: It is possible to cause the kernel to panic when more than the default
433: number of sempahores have been allocated.</a>
1.333 deraadt 434: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 435: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
436: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
437: option.</a>
1.333 deraadt 438: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 439: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 440: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 441: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
442: overflow.</a>
1.333 deraadt 443: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 444: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 445: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 446: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 447: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 448: A race condition has been reported to exist in the handling by sendmail
449: of asynchronous signals.</a>
450: </ul>
451:
452: <li>
1.318 deraadt 453: <a name="38"></a>
454:
455: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
456: These are the OpenBSD 3.8 advisories -- all these problems are solved
457: in <a href=anoncvs.html>OpenBSD current</a> and the
458: <a href=stable.html>patch branch</a>.
459:
460: <p>
461: <ul>
1.332 brad 462: <li><a href="errata38.html#ssh2">Oct 12, 2006:
463: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 464: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 465: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 466: found by Chris Evans.</a>
467: <li><a href="errata38.html#openssl2">Oct 7, 2006:
468: Several problems have been found in OpenSSL.</a>
469: <li><a href="errata38.html#httpd2">Oct 7, 2006:
470: httpd(8) does not sanitize the Expect header from an HTTP request
471: when it is reflected back in an error message, which might allow
472: cross-site scripting (XSS) style attacks.</a>
1.329 brad 473: <li><a href="errata38.html#openssl">Sep 8, 2006:
474: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
475: possible for an attacker to construct an invalid signature which
476: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 477: <li><a href="errata38.html#bind">Sep 8, 2006:
478: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 479: <li><a href="errata38.html#sppp">Sep 2, 2006:
480: Due to the failure to correctly validate LCP configuration option
481: lengths, it is possible for an attacker to send LCP packets via an
482: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 483: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
484: A problem in isakmpd(8) caused IPsec to run partly without replay
485: protection.</a>
486: <li><a href="errata38.html#sem">Aug 25, 2006:
487: It is possible to cause the kernel to panic when more than the default
488: number of sempahores have been allocated.</a>
489: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
490: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
491: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
492: option.</a>
493: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
494: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 495: <li><a href="errata38.html#httpd">Jul 30, 2006:
496: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
497: overflow.</a>
1.324 brad 498: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
499: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 500: <li><a href="errata38.html#xorg">May 2, 2006:
501: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 502: <li><a href="errata38.html#sendmail">Mar 25, 2006:
503: A race condition has been reported to exist in the handling by sendmail
504: of asynchronous signals.</a>
505: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 506: Josh Bressers has reported a weakness in OpenSSH caused due to the
507: insecure use of the system(3) function in scp(1) when performing copy
508: operations using filenames that are supplied by the user from the
509: command line.</a>
1.321 brad 510: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 511: Do not allow users to trick suid programs into re-opening files via
512: /dev/fd.</a>
1.321 brad 513: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 514: A buffer overflow has been found in the Perl interpreter with the
515: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 516: </ul>
517:
518: <li>
1.312 david 519: <a name="37"></a>
520:
521: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
522: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 523: in <a href="anoncvs.html">OpenBSD current</a>. The
524: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
525: you should update your machine.
1.312 david 526:
527: <p>
528: <ul>
1.322 brad 529: <li><a href="errata37.html#xorg">May 2, 2006:
530: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 531: <li><a href="errata37.html#sendmail">Mar 25, 2006:
532: A race condition has been reported to exist in the handling by sendmail
533: of asynchronous signals.</a>
1.320 brad 534: <li><a href="errata37.html#ssh">Feb 12, 2006:
535: Josh Bressers has reported a weakness in OpenSSH caused due to the
536: insecure use of the system(3) function in scp(1) when performing copy
537: operations using filenames that are supplied by the user from the
538: command line.</a>
1.319 brad 539: <li><a href="errata37.html#fd">Jan 5, 2006:
540: Do not allow users to trick suid programs into re-opening files via
541: /dev/fd.</a>
542: <li><a href="errata37.html#perl">Jan 5, 2006:
543: A buffer overflow has been found in the Perl interpreter with the
544: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 545: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 546: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 547: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 548: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 549: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 550: Fix a race condition in sudo(8) that could allow a user
1.315 millert 551: to run arbitrary commands.</a>
1.318 deraadt 552: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 553: Fix a buffer overflow, memory leaks, and NULL pointer
554: dereference in cvs(1).</a>
1.312 david 555: </ul>
556:
557: <li>
1.301 miod 558: <a name="36"></a>
559:
560: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
561: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 562: in <a href="anoncvs.html">OpenBSD current</a>. The
563: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
564: you should update your machine.
1.301 miod 565:
566: <p>
1.302 markus 567: <ul>
1.317 millert 568: <li><a href="errata36.html#libz2">Jul 21, 2005:
569: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 570: <li><a href="errata36.html#libz">Jul 6, 2005:
571: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 572: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 573: Fix a race condition in sudo(8) that could allow a user
1.315 millert 574: to run arbitrary commands.</a>
1.311 deraadt 575: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 576: Fix a buffer overflow, memory leaks, and NULL pointer
577: dereference in cvs(1).</a>
1.311 deraadt 578: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 579: Due to buffer overflows in telnet(1), a malicious
580: server or man-in-the-middle attack could allow
581: execution of arbitrary code with the privileges of
582: the user invoking telnet(1).</a>
1.311 deraadt 583: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 584: More stringent checking should be done in the copy(9)
585: functions to prevent their misuse.</a>
1.311 deraadt 586: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 587: More stringent checking should be done in the copy(9)
588: functions to prevent their misuse.</a>
1.311 deraadt 589: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 590: httpd(8)'s mod_include module fails to properly validate
591: the length of user supplied tag strings prior to copying
1.305 brad 592: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 593: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 594: On systems running isakmpd(8) it is possible for a local
595: user to cause kernel memory corruption and system panic by
1.303 markus 596: setting ipsec(4) credentials on a socket.</a>
1.302 markus 597: </ul>
1.301 miod 598:
599: <li>
1.288 matthieu 600: <a name="35"></a>
1.279 deraadt 601:
1.294 david 602: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 603: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 604: in <a href="anoncvs.html">OpenBSD current</a>. The
605: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
606: you should update your machine.
1.279 deraadt 607:
608: <p>
609: <ul>
1.310 brad 610: <li><a href="errata35.html#cvs4">Apr 28, 2005:
611: Fix a buffer overflow, memory leaks, and NULL pointer
612: dereference in cvs(1).</a>
1.309 brad 613: <li><a href="errata35.html#telnet">Mar 30, 2005:
614: Due to buffer overflows in telnet(1), a malicious
615: server or man-in-the-middle attack could allow
616: execution of arbitrary code with the privileges of
617: the user invoking telnet(1).</a>
1.308 brad 618: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 619: More stringent checking should be done in the copy(9)
620: functions to prevent their misuse.</a>
1.306 brad 621: <li><a href="errata35.html#locore">Feb 28, 2005:
622: More stringent checking should be done in the copy(9)
623: functions to prevent their misuse.</a>
1.304 brad 624: <li><a href="errata35.html#httpd3">Jan 12, 2005:
625: httpd(8)'s mod_include module fails to properly validate
626: the length of user supplied tag strings prior to copying
1.305 brad 627: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 628: <li><a href="errata35.html#pfkey">Dec 14, 2004:
629: On systems running isakmpd(8) it is possible for a local
630: user to cause kernel memory corruption and system panic by
1.303 markus 631: setting ipsec(4) credentials on a socket.</a>
1.301 miod 632: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 633: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 634: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 635: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 636: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 637: httpd(8)'s mod_rewrite module can be made to write one zero byte in
638: an arbitrary memory position outside of a char array, causing a DoS
639: or possibly buffer overflows.</a>
1.301 miod 640: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 641: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 642: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 643: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 644: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 645: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 646: Multiple remote vulnerabilities have been found in the cvs(1)
647: server which can be used by CVS clients to crash or execute
1.293 brad 648: arbitrary code on the server.</a>
1.301 miod 649: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 650: kdc(8) performs inadequate checking of request fields, leading
651: to the possibility of principal impersonation from other
652: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 653: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 654: xdm(1) ignores the requestPort resource and creates a
1.293 brad 655: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 656: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 657: A buffer overflow in the cvs(1) server has been found,
658: which can be used by CVS clients to execute arbitrary code on
1.293 brad 659: the server.</a>
1.301 miod 660: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 661: Integer overflow problems were found in procfs, allowing
1.293 brad 662: reading of arbitrary kernel memory.</a>
1.301 miod 663: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 664: Pathname validation problems have been found in cvs(1),
665: allowing clients and servers access to files outside the
1.293 brad 666: repository or local CVS tree.</a>
1.279 deraadt 667: </ul>
668:
669: <p>
670: <li>
1.288 matthieu 671: <a name="34"></a>
1.261 david 672:
1.294 david 673: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 674: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 675: in <a href="anoncvs.html">OpenBSD current</a>. The
676: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
677: you should update your machine.
1.261 david 678: <p>
679: <ul>
1.302 markus 680: <li><a href="errata34.html#pfkey">Dec 14, 2004:
681: On systems running isakmpd(8) it is possible for a local
682: user to cause kernel memory corruption and system panic by
1.303 markus 683: setting ipsec(4) credentials on a socket.</a>
1.298 brad 684: <li><a href="errata34.html#xpm">Sep 16, 2004:
685: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 686: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
687: httpd(8)'s mod_rewrite module can be made to write one zero byte in
688: an arbitrary memory position outside of a char array, causing a DoS
689: or possibly buffer overflows.</a>
1.294 david 690: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 691: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 692: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 693: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 694: an attacker can delete IPsec tunnels at will.</a>
1.294 david 695: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 696: Multiple remote vulnerabilities have been found in the cvs(1)
697: server which can be used by CVS clients to crash or execute
1.293 brad 698: arbitrary code on the server.</a>
1.294 david 699: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 700: kdc(8) performs inadequate checking of request fields, leading
701: to the possibility of principal impersonation from other
702: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 703: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 704: A buffer overflow in the cvs(1) server has been found,
705: which can be used by CVS clients to execute arbitrary code on
706: the server.</a>
1.294 david 707: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 708: Integer overflow problems were found in procfs, allowing
709: reading of arbitrary kernel memory.</a>
1.294 david 710: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 711: Pathname validation problems have been found in cvs(1),
712: allowing clients and servers access to files outside the
713: repository or local CVS tree.</a>
1.294 david 714: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 715: A missing check for a NULL-pointer dereference may allow a
1.281 otto 716: remote attacker to crash applications using OpenSSL.</a>
1.294 david 717: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 718: Defects in the payload validation and processing functions of
719: isakmpd have been discovered. An attacker could send malformed
720: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 721: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 722: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
723: access module, using IP addresses without a netmask on big endian
724: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 725: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 726: An IPv6 MTU handling problem exists that could be used by an
727: attacker to cause a denial of service attack.</a>
1.294 david 728: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 729: A reference counting bug in shmat(2) could be used to write to
730: kernel memory under certain circumstances.</a>
1.294 david 731: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 732: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 733: by Thomas Walpuski.</a>
1.294 david 734: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 735: It may be possible for a local user to overrun the stack in
736: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 737: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 738: The use of certain ASN.1 encodings or malformed public keys may
739: allow an attacker to mount a denial of service attack against
740: applications linked with ssl(3).</a>
1.261 david 741: </ul>
742:
743: <li>
1.288 matthieu 744: <a name="33"></a>
1.246 deraadt 745:
1.294 david 746: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 747: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 748: in <a href="anoncvs.html">OpenBSD current</a>. The
749: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 750: you should update your machine.
1.246 deraadt 751: <p>
752: <ul>
1.294 david 753: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 754: Pathname validation problems have been found in cvs(1),
755: allowing clients and servers access to files outside the
756: repository or local CVS tree.</a>
1.294 david 757: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 758: A missing check for a NULL-pointer dereference may allow a
1.281 otto 759: remote attacker to crash applications using OpenSSL.</a>
1.294 david 760: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 761: Defects in the payload validation and processing functions of
762: isakmpd have been discovered. An attacker could send malformed
763: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 764: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 765: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
766: access module, using IP addresses without a netmask on big endian
767: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 768: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 769: An IPv6 MTU handling problem exists that could be used by an
770: attacker to cause a denial of service attack.</a>
1.294 david 771: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 772: A reference counting bug in shmat(2) could be used to write to
773: kernel memory under certain circumstances.</a>
1.294 david 774: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 775: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 776: by Thomas Walpuski.</a>
1.294 david 777: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 778: It may be possible for a local user to execute arbitrary code
779: resulting in escalation of privileges due to a stack overrun
780: in compat_ibcs2(8).</a>
1.294 david 781: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 782: The use of certain ASN.1 encodings or malformed public keys may
783: allow an attacker to mount a denial of service attack against
784: applications linked with ssl(3).</a>
1.294 david 785: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 786: Access of freed memory in pf(4) could be used to
1.260 margarid 787: remotely panic a machine using scrub rules.</a>
1.294 david 788: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 789: A buffer overflow in the address parsing in
790: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 791: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 792: OpenSSH versions prior to 3.7 contains a buffer management error
793: that is potentially exploitable.</a>
1.294 david 794: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 795: Root may be able to reduce the security level by taking advantage of
796: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 797: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 798: An improper bounds check in the kernel may allow a local user
799: to panic the kernel.</a>
1.294 david 800: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 801: An off-by-one error exists in the C library function realpath(3)
802: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 803: </ul>
804:
1.265 miod 805:
1.247 david 806: <p>
1.246 deraadt 807: <li>
1.288 matthieu 808: <a name="32"></a>
1.224 deraadt 809:
1.294 david 810: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 811: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 812: in <a href="anoncvs.html">OpenBSD current</a>. The
813: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 814: you should update your machine.
1.224 deraadt 815: <p>
816: <ul>
1.294 david 817: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 818: The use of certain ASN.1 encodings or malformed public keys may
819: allow an attacker to mount a denial of service attack against
820: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 821: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 822: Access of freed memory in pf(4) could be used to
1.260 margarid 823: remotely panic a machine using scrub rules.</a>
1.294 david 824: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 825: A buffer overflow in the address parsing in
826: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 827: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 828: OpenSSH versions prior to 3.7 contains a buffer management error
829: that is potentially exploitable.</a>
1.294 david 830: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 831: Fix for a potential security issue in
832: sendmail(8) with respect to DNS maps.</a>
1.294 david 833: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 834: An off-by-one error exists in the C library function realpath(3)
835: may allow an attacker to gain escalated privileges.</a>
1.294 david 836: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 837: A buffer overflow in the address parsing in
838: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 839: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 840: A cryptographic weaknesses in the Kerberos v4 protocol can be
841: exploited on Kerberos v5 as well.</a>
1.294 david 842: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 843: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 844: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 845: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 846: Various SSL and TLS operations in OpenSSL are vulnerable to
847: timing attacks.</a>
1.294 david 848: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 849: A buffer overflow in lprm(1) may allow an attacker to elevate
850: privileges to user daemon.</a>.
1.294 david 851: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 852: A buffer overflow in the envelope comments processing in
853: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 854: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 855: httpd(8) leaks file inode numbers via ETag header as well as
856: child PIDs in multipart MIME boundary generation. This could
857: lead, for example, to NFS exploitation because it uses inode
858: numbers as part of the file handle.</a>
1.294 david 859: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 860: In ssl(8) an information leak can occur via timing by performing
861: a MAC computation even if incorrect block cipher padding has
862: been found, this is a countermeasure. Also, check for negative
863: sizes, in allocation routines.</a>
1.294 david 864: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 865: A double free exists in cvs(1) that could lead to privilege
866: escalation for cvs configurations where the cvs command is
1.233 margarid 867: run as a privileged user.</a>
1.294 david 868: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 869: A buffer overflow exists in named(8) that could lead to a
870: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 871: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 872: A logic error in the pool kernel memory allocator could cause
873: memory corruption in low-memory situations, causing the system
874: to crash.</a>
1.294 david 875: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 876: An attacker can bypass smrsh(8)'s restrictions and execute
877: arbitrary commands with the privileges of his own account.</a>
1.294 david 878: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 879: Network bridges running pf with scrubbing enabled could cause
880: mbuf corruption, causing the system to crash.</a>
1.294 david 881: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 882: A buffer overflow can occur in the kadmind(8) daemon, leading
883: to possible remote crash or exploit.</a>
1.224 deraadt 884: </ul>
885:
1.227 miod 886: <p>
887: <li>
1.288 matthieu 888: <a name="31"></a>
1.203 deraadt 889:
1.294 david 890: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 891: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 892: in <a href="anoncvs.html">OpenBSD current</a>. The
893: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 894: you should update your machine.
1.203 deraadt 895:
896: <p>
897: <ul>
1.294 david 898: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 899: A buffer overflow in the address parsing in
900: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 901: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 902: A cryptographic weaknesses in the Kerberos v4 protocol can be
903: exploited on Kerberos v5 as well.</a>
1.294 david 904: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 905: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 906: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 907: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 908: Various SSL and TLS operations in OpenSSL are vulnerable to
909: timing attacks.</a>
1.294 david 910: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 911: A buffer overflow in lprm(1) may allow an attacker to gain
912: root privileges.</a>
1.294 david 913: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 914: A buffer overflow in the envelope comments processing in
915: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 916: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 917: In ssl(8) an information leak can occur via timing by performing
918: a MAC computation even if incorrect block cipher padding has
919: been found, this is a countermeasure. Also, check for negative
920: sizes, in allocation routines.</a>
1.294 david 921: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 922: A double free exists in cvs(1) that could lead to privilege
923: escalation for cvs configurations where the cvs command is
1.294 david 924: run as a privileged user</a>.
925: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 926: A buffer overflow exists in named(8) that could lead to a
927: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 928: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 929: Incorrect argument checking in the getitimer(2) system call
930: may allow an attacker to crash the system.</a>
1.294 david 931: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 932: An attacker can bypass smrsh(8)'s restrictions and execute
933: arbitrary commands with the privileges of his own account.</a>
1.294 david 934: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 935: A buffer overflow can occur in the kadmind(8) daemon, leading
936: to possible remote crash or exploit.</a>
1.294 david 937: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 938: Incorrect argument checking in the setitimer(2) system call
939: may allow an attacker to write to kernel memory.</a>
1.294 david 940: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 941: An insufficient boundary check in the select system call
1.220 miod 942: allows an attacker to overwrite kernel memory and execute arbitrary code
943: in kernel context.</a>
1.294 david 944: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 945: Several remote buffer overflows can occur in the SSL2 server and SSL3
946: client of the ssl(8) library, as in the ASN.1 parser code in the
947: crypto(3) library, all of them being potentially remotely
948: exploitable.</a>
1.294 david 949: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 950: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
951: possible remote crash.</a>
1.294 david 952: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 953: A race condition exists in the pppd(8) daemon which may cause it to
954: alter the file permissions of an arbitrary file.</a>
1.294 david 955: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 956: Receiving IKE payloads out of sequence can cause isakmpd(8) to
957: crash.</a>
1.294 david 958: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 959: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 960: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 961: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 962: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 963: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 964: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 965: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 966: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 967: input validation error that can result in an integer overflow and
968: privilege escalation.</a>
1.294 david 969: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 970: A buffer overflow can occur during the interpretation of chunked
971: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 972: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 973: Under certain conditions, on systems using YP with netgroups
974: in the password database, it is possible that sshd(8) does
975: ACL checks for the requested user name but uses the password
976: database entry of a different user for authentication. This
977: means that denied users might authenticate successfully
978: while permitted users could be locked out.</a>
1.294 david 979: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 980: A race condition exists that could defeat the kernel's
981: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 982: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 983: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 984: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 985: A local user can gain super-user privileges due to a buffer
986: overflow in sshd(8) if AFS has been configured on the system
987: or if KerberosTgtPassing or AFSTokenPassing has been enabled
988: in the sshd_config file.</a>
1.203 deraadt 989: </ul>
990:
1.235 miod 991: <p>
1.203 deraadt 992: <li>
1.288 matthieu 993: <a name="30"></a>
1.187 deraadt 994:
1.294 david 995: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 996: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 997: in <a href="anoncvs.html">OpenBSD current</a>. The
998: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 999: you should update your machine.
1.187 deraadt 1000:
1001: <p>
1002: <ul>
1.294 david 1003: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1004: A buffer overflow exists in named(8) that could lead to a
1005: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1006: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1007: Incorrect argument checking in the getitimer(2) system call
1008: may allow an attacker to crash the system.</a>
1.294 david 1009: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1010: An attacker can bypass smrsh(8)'s restrictions and execute
1011: arbitrary commands with the privileges of his own account.</a>
1.294 david 1012: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1013: A buffer overflow can occur in the kadmind(8) daemon, leading
1014: to possible remote crash or exploit.</a>
1.294 david 1015: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1016: Incorrect argument checking in the setitimer(2) system call
1017: may allow an attacker to write to kernel memory.</a>
1.294 david 1018: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1019: An insufficient boundary check in the select and poll system calls
1020: allows an attacker to overwrite kernel memory and execute arbitrary code
1021: in kernel context.</a>
1.294 david 1022: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1023: Several remote buffer overflows can occur in the SSL2 server and SSL3
1024: client of the ssl(8) library, as in the ASN.1 parser code in the
1025: crypto(3) library, all of them being potentially remotely
1026: exploitable.</a>
1.294 david 1027: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1028: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1029: possible remote crash.</a>
1.294 david 1030: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1031: A race condition exists in the pppd(8) daemon which may cause it to
1032: alter the file permissions of an arbitrary file.</a>
1.294 david 1033: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1034: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1035: crash.</a>
1.294 david 1036: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1037: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1038: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1039: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1040: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1041: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1042: input validation error that can result in an integer overflow and
1043: privilege escalation.</a>
1.294 david 1044: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1045: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1046: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1047: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1048: A buffer overflow can occur during the interpretation of chunked
1049: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1050: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1051: A race condition exists that could defeat the kernel's
1052: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1053: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1054: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1055: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1056: A local user can gain super-user privileges due to a buffer
1057: overflow in sshd(8) if AFS has been configured on the system
1058: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1059: in the sshd_config file.</a>
1.294 david 1060: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1061: The mail(1) was interpreting tilde escapes even when invoked
1062: in non-interactive mode. As mail(1) is called as root from cron,
1063: this can lead to a local root compromise.</a>
1.294 david 1064: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1065: Under certain conditions, on systems using YP with netgroups in
1066: the password database, it is possible for the rexecd(8) and rshd(8)
1067: daemons to execute a shell from a password database entry for a
1068: different user. Similarly, atrun(8) may change to the wrong
1069: home directory when running jobs.</a>
1.294 david 1070: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1071: A potential double free() exists in the zlib library;
1072: this is not exploitable on OpenBSD.
1073: The kernel also contains a copy of zlib; it is not
1074: currently known if the kernel zlib is exploitable.</a>
1.294 david 1075: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1076: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1077: may allow a local user to gain super-user privileges.</a>
1.294 david 1078: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1079: A race condition between the ptrace(2) and execve(2) system calls
1080: allows an attacker to modify the memory contents of suid/sgid
1081: processes which could lead to compromise of the super-user account.</a>
1.294 david 1082: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1083: There is a security hole in sudo(8) that can be exploited
1084: when the Postfix sendmail replacement is installed that may
1085: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1086: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1087: An attacker can trick a machine running the lpd daemon into
1088: creating new files in the root directory from a machine with
1089: remote line printer access.</a>
1.294 david 1090: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1091: The vi.recover script can be abused in such a way as
1092: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1093: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1094: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1095: resulting in a crash.</a>
1.294 david 1096: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1097: A security hole that may allow an attacker to partially authenticate
1098: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1099: </ul>
1100:
1101: <p>
1102: <li>
1.288 matthieu 1103: <a name="29"></a>
1.173 deraadt 1104:
1.294 david 1105: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1106: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1107: in <a href="anoncvs.html">OpenBSD current</a>. The
1108: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1109: you should update your machine.
1110:
1.173 deraadt 1111:
1112: <p>
1113: <ul>
1.294 david 1114: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1115: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1116: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1117: A race condition exists that could defeat the kernel's
1118: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1119: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1120: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1121: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1122: A local user can gain super-user privileges due to a buffer
1123: overflow in sshd(8) if AFS has been configured on the system
1124: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1125: in the sshd_config file.</a>
1.294 david 1126: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1127: The mail(1) was interpreting tilde escapes even when invoked
1128: in non-interactive mode. As mail(1) is called as root from cron,
1129: this can lead to a local root compromise.</a>
1.294 david 1130: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1131: A potential double free() exists in the zlib library;
1132: this is not exploitable on OpenBSD.
1133: The kernel also contains a copy of zlib; it is not
1134: currently known if the kernel zlib is exploitable.</a>
1.294 david 1135: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1136: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1137: may allow a local user to gain super-user privileges.</a>
1.294 david 1138: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1139: A race condition between the ptrace(2) and execve(2) system calls
1140: allows an attacker to modify the memory contents of suid/sgid
1141: processes which could lead to compromise of the super-user account.</a>
1.294 david 1142: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1143: There is a security hole in sudo(8) that can be exploited
1144: when the Postfix sendmail replacement is installed that may
1145: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1146: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1147: An attacker can trick a machine running the lpd daemon into
1148: creating new files in the root directory from a machine with
1149: remote line printer access.</a>
1.294 david 1150: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1151: The vi.recover script can be abused in such a way as
1152: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1153: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1154: A security hole exists in uuxqt(8) that may allow an
1155: attacker to gain root privileges.</a>
1.294 david 1156: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1157: A security hole exists in lpd(8) that may allow an
1158: attacker to gain root privileges if lpd is running.</a>
1.294 david 1159: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1160: A security hole exists in sendmail(8) that may allow an
1161: attacker on the local host to gain root privileges.</a>
1.294 david 1162: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1163: A kernel buffer overflow in the NFS code can be used to execute
1164: arbitrary code by users with mount privileges (only root by
1.181 millert 1165: default).</a>
1.294 david 1166: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1167: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1168: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1169: sshd(8) allows users to delete arbitrary files named "cookies"
1170: if X11 forwarding is enabled. X11 forwarding is disabled
1171: by default.</a>
1.294 david 1172: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1173: Programs using the fts routines can be tricked into changing
1174: into the wrong directory.</a>
1.294 david 1175: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1176: Sendmail signal handlers contain unsafe code,
1177: leading to numerous race conditions.</a>
1.173 deraadt 1178: </ul>
1179:
1180: <p>
1181: <li>
1.288 matthieu 1182: <a name="28"></a>
1.152 deraadt 1183:
1.294 david 1184: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1185: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1186: in <a href="anoncvs.html">OpenBSD current</a>. The
1187: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1188: you should update your machine.
1189:
1.152 deraadt 1190:
1191: <p>
1192: <ul>
1.294 david 1193: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1194: A security hole exists in uuxqt(8) that may allow an
1195: attacker to gain root privileges.</a>
1.294 david 1196: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1197: A security hole exists in lpd(8) that may allow an
1198: attacker to gain root privileges if lpd is running.</a>
1.294 david 1199: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1200: A security hole exists in sendmail(8) that may allow an
1201: attacker on the local host to gain root privileges.</a>
1.294 david 1202: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1203: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1204: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1205: Programs using the fts routines can be tricked into changing
1206: into the wrong directory.</a>
1.294 david 1207: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1208: Sendmail signal handlers contain unsafe code,
1209: leading to numerous race conditions.</a>
1.294 david 1210: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1211: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1212: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1213: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1214: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1215: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1216: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1217: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1218: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1219: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1220: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1221: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1222: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1223: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1224: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1225: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1226: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1227: rnd(4) did not use all of its input when written to.</a>
1.294 david 1228: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1229: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1230: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1231: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1232: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1233: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1234: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1235: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1236: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1237: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1238: </ul>
1239:
1240: <p>
1241: <li>
1.288 matthieu 1242: <a name="27"></a>
1.124 deraadt 1243:
1.294 david 1244: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1245: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1246: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1247: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1248:
1249: <p>
1250: <ul>
1.294 david 1251: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1252: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1253: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1254: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1255: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1256: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1257: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1258: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1259: (patch included)</a>
1.294 david 1260: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1261: X11 libraries have 2 potential overflows in xtrans code.
1262: (patch included)</a>
1.294 david 1263: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1264: Apache mod_rewrite and mod_vhost_alias modules could expose files
1265: on the server in certain configurations if used.
1266: (patch included)</a>
1.294 david 1267: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1268: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1269: TERMPATH and TERMCAP environment variables as it should.
1270: (patch included)</a>
1.294 david 1271: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1272: There are printf-style format string bugs in several privileged
1273: programs. (patch included)</a>
1.294 david 1274: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1275: libcurses honored terminal descriptions in the $HOME/.terminfo
1276: directory as well as in the TERMCAP environment variable for
1277: setuid and setgid applications.
1.146 deraadt 1278: (patch included)</a>
1.294 david 1279: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1280: A format string vulnerability exists in talkd(8).
1281: (patch included)</a>
1.294 david 1282: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1283: A format string vulnerability exists in the pw_error() function of the
1284: libutil library, yielding localhost root through chpass(1).
1285: (patch included)</a>
1.294 david 1286: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1287: Bad ESP/AH packets could cause a crash under certain conditions.
1288: (patch included)</a>
1.294 david 1289: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1290: A format string vulnerability (localhost root) exists in xlock(1).
1291: (patch included)</a>
1.294 david 1292: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1293: Various bugs found in X11 libraries have various side effects, almost
1294: completely denial of service in OpenBSD.
1295: (patch included)</a>
1.294 david 1296: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1297: Just like pretty much all the other unix ftp daemons
1298: on the planet, ftpd had a remote root hole in it.
1299: Luckily, ftpd was not enabled by default.
1.137 deraadt 1300: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1301: (patch included)</a>
1.294 david 1302: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1303: Mopd, very rarely used, contained some buffer overflows.
1304: (patch included)</a>
1.294 david 1305: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1306: libedit would check for a <b>.editrc</b> file in the current
1307: directory. Not known to be a real security issue, but a patch
1308: is available anyways.
1309: (patch included)</a>
1.294 david 1310: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1311: A serious bug in dhclient(8) could allow strings from a
1312: malicious dhcp server to be executed in the shell as root.
1313: (patch included)</a>
1.294 david 1314: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1315: A serious bug in isakmpd(8) policy handling wherein
1316: policy verification could be completely bypassed in isakmpd.
1317: (patch included)</a>
1.294 david 1318: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1319: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1320: should not be used, and results in security problems on
1321: other operating systems.</a>
1.294 david 1322: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1323: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1324: (patch included)</a>
1.294 david 1325: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1326: Improper use of ipf <i>keep-state</i> rules can result
1327: in firewall rules being bypassed. (patch included)</a>
1328:
1.124 deraadt 1329: </ul>
1330:
1331: <p>
1332: <li>
1.288 matthieu 1333: <a name="26"></a>
1.119 deraadt 1334:
1.294 david 1335: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1336: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1337: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1338: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1339:
1340: <p>
1341: <ul>
1.294 david 1342: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1343: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1344: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1345: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1346: Improper use of ipf <i>keep-state</i> rules can result
1347: in firewall rules being bypassed. (patch included)</a>
1.294 david 1348: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1349: xlockmore has a bug which a localhost attacker can use to gain
1350: access to the encrypted root password hash (which is normally
1.245 miod 1351: encoded using blowfish</a> (see
1.294 david 1352: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1353: crypt(3)</a>)
1.245 miod 1354: (patch included).
1.294 david 1355: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1356: Systems running with procfs enabled and mounted are
1357: vulnerable to a very tricky exploit. procfs is not
1358: mounted by default.
1359: (patch included).</a>
1.294 david 1360: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1361: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1362: thus exposing the system to a race where the aliases file
1363: did not exist.
1.119 deraadt 1364: (patch included).</a>
1.294 david 1365: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1366: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1367: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1368: A buffer overflow in the RSAREF code included in the
1369: USA version of libssl, is possibly exploitable in
1370: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1371: (patch included).<br></a>
1372: <strong>Update:</strong> Turns out that this was not exploitable
1373: in any of the software included in OpenBSD 2.6.
1.294 david 1374: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1375: Any user could change interface media configurations, resulting in
1376: a localhost denial of service attack.
1.121 deraadt 1377: (patch included).</a>
1.119 deraadt 1378: </ul>
1379:
1380: <p>
1381: <li>
1.288 matthieu 1382: <a name="25"></a>
1.106 deraadt 1383:
1.294 david 1384: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1385: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1386: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1387: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1388:
1.96 deraadt 1389: <p>
1.104 deraadt 1390: <ul>
1.294 david 1391: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1392: In cron(8), make sure argv[] is NULL terminated in the
1393: fake popen() and run sendmail as the user, not as root.
1394: (patch included).</a>
1.294 david 1395: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1396: filesystems had an overrun in their handling of uio_offset
1397: in their readdir() routines. (These filesystems are not
1398: enabled by default). (patch included).</a>
1.294 david 1399: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1400: when we execve() a new process. (patch included).</a>
1.294 david 1401: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1402: been handled by IPsec may be transmitted as cleartext.
1403: PF_KEY SA expirations may leak kernel resources.
1404: (patch included).</a>
1.294 david 1405: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1406: motd re-writing and change the find(1) to use -execdir
1407: (patch included).</a>
1.294 david 1408: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1409: users to chflags(2) or fchflags(2) on character or block devices
1410: which they may currently be the owner of (patch included).</a>
1.294 david 1411: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1412: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1413: </ul>
1414:
1.106 deraadt 1415: <p>
1416: <li>
1.288 matthieu 1417: <a name="24"></a>
1.235 miod 1418:
1.294 david 1419: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1420: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1421: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1422: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1423:
1.96 deraadt 1424: <p>
1.75 deraadt 1425: <ul>
1.294 david 1426: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1427: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1428: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1429: another kernel crash case caused by the <strong>crashme</strong>
1430: program (patch included).</a>
1.294 david 1431: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1432: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1433: (patch included).</a>
1.294 david 1434: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1435: existed in ping(8). (patch included).</a>
1.294 david 1436: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1437: the ipq, which could permit an attacker to cause a crash.
1438: (patch included).</a>
1.294 david 1439: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1440: kernel between accept(2) and select(2) could permit an attacker
1441: to hang sockets from remote.
1442: (patch included).</a>
1.294 david 1443: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1444: bog the machine excessively and cause problems.
1445: (patch included).</a>
1.294 david 1446: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1447: DDB interacted to possibly cause a crash.
1448: (patch included).</a>
1.294 david 1449: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1450: (patch included).</a>
1.294 david 1451: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1452: problem in bootpd(8). (patch included).</a>
1.294 david 1453: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1454: exploitable problem relating to environment variables in termcap
1455: and curses. (patch included).</a>
1.294 david 1456: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1457: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1458: </ul>
1459:
1.106 deraadt 1460: <p>
1461: <li>
1.288 matthieu 1462: <a name="23"></a>
1.235 miod 1463:
1.294 david 1464: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1465: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1466: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1467: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1468:
1.96 deraadt 1469: <p>
1.53 matthieu 1470: <ul>
1.294 david 1471: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1472: problem in bootpd(8). (patch included).</a>
1.294 david 1473: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1474: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1475: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1476: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1477: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1478: chpass(1) has a file descriptor leak which allows an
1479: attacker to modify /etc/master.passwd.</a>
1.294 david 1480: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1481: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1482: should not be executed with fd slots 0, 1, or 2 free.
1483: (patch included).</a>
1.294 david 1484: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1485: libraries (patches included).</a>
1.294 david 1486: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1487: processes too permissive (4th revision patch included).</a>
1.294 david 1488: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1489: of immutable and append-only file flags. (patch included).</a>
1.294 david 1490: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1491: if IPSEC is enabled (patch included).</a>
1.294 david 1492: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1493: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1494: </ul>
1.9 deraadt 1495:
1.106 deraadt 1496: <p>
1497: <li>
1.288 matthieu 1498: <a name="22"></a>
1.235 miod 1499:
1.294 david 1500: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1501: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1502: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1503: still exist in other operating systems. (The supplied patches are for
1504: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1505:
1.96 deraadt 1506: <p>
1.9 deraadt 1507: <ul>
1.294 david 1508: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1509: packets if IPSEC is enabled (patch included).</a>
1.294 david 1510: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1511: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1512: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1513: (patch included).</a>
1.294 david 1514: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1515: (patch included).</a>
1.294 david 1516: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1517: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1518: (patch included).</a>
1.294 david 1519: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1520: export (patch included).</a>
1.112 philen 1521: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1522: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1523: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1524: Acceptance.</a>
1.294 david 1525: A patch is available <a href="errata22.html#sourceroute">here</a>.
1526: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1527: flaw (patch included).</a>
1.294 david 1528: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1529: </ul>
1530:
1.106 deraadt 1531: <p>
1532: <li>
1.288 matthieu 1533: <a name="21"></a>
1.235 miod 1534:
1.294 david 1535: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1536: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1537: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1538: exist in other operating systems. (If you are running OpenBSD 2.1, we
1539: would strongly recommend an upgrade to the newest release, as this
1540: patch list only attempts at fixing the most important security
1541: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1542: security problems. Many of those problems were solved in ways which
1543: make it hard for us to provide patches).
1544:
1.96 deraadt 1545: <p>
1.52 deraadt 1546: <ul>
1.112 philen 1547: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1548: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1549: (patch included)</a>
1.112 philen 1550: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1551: </ul>
1.51 deraadt 1552:
1.106 deraadt 1553: <p>
1554: <li>
1.288 matthieu 1555: <a name="20"></a>
1.235 miod 1556:
1.294 david 1557: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1558: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1559: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1560: exist in other operating systems. (If you are running OpenBSD 2.0, we
1561: commend you for being there back in the old days!, but you're really
1562: missing out if you don't install a new version!)
1563:
1564: <p>
1565: <ul>
1.112 philen 1566: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1567: resolver (patch included)</a>
1568: <li>Many others... if people can hunt them down, please let me know
1569: and we'll put them up here.
1570: </ul>
1.51 deraadt 1571: <p>
1.106 deraadt 1572:
1.288 matthieu 1573: <a name="watching"></a>
1.294 david 1574: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1575:
1.21 deraadt 1576: Since we take a proactive stance with security, we are continually
1577: finding and fixing new security problems. Not all of these problems
1.80 espie 1578: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1579: confirmed to be exploitable; many simple bugs we fix do turn out to
1580: have security consequences we could not predict. We do not have the
1581: time resources to make these changes available in the above format.<p>
1.21 deraadt 1582:
1583: Thus there are usually minor security fixes in the current source code
1584: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1585: guarantee that these problems are of minimal impact and unproven
1.44 ian 1586: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1587: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1588:
1.45 deraadt 1589: People who are really concerned with security can do a number of
1590: things:<p>
1.21 deraadt 1591:
1592: <ul>
1593: <li>If you understand security issues, watch our
1.294 david 1594: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1595: eye out for things which appear security related. Since
1.21 deraadt 1596: exploitability is not proven for many of the fixes we make,
1597: do not expect the relevant commit message to say "SECURITY FIX!".
1598: If a problem is proven and serious, a patch will be available
1599: here very shortly after.
1.161 horacio 1600: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1601: security-announce mailing list</a> which will notify you for every
1.186 ian 1602: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1603: and instruct you on how to patch the problem.
1.21 deraadt 1604: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1605: complete system build from time to time (read /usr/src/Makefile
1606: carefully). Users can make the assumption that the current
1607: source tree always has stronger security than the previous release.
1.45 deraadt 1608: However, building your own system from source code is not trivial;
1.265 miod 1609: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1610: transition between major releases.
1.115 ericj 1611: <li>Install a binary snapshot for your
1.80 espie 1612: architecture, which are made available fairly often. For
1.29 deraadt 1613: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1614: </ul>
1615:
1.9 deraadt 1616: <p>
1.288 matthieu 1617: <a name="reporting"></a>
1.294 david 1618: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1619:
1.5 deraadt 1620: <p> If you find a new security problem, you can mail it to
1.294 david 1621: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1622: <br>
1.5 deraadt 1623: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1624: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1625:
1.107 deraadt 1626: <p>
1.288 matthieu 1627: <a name="papers"></a>
1.294 david 1628: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1629:
1630: A number of papers have been written by OpenBSD team members, about security
1631: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1632: documents are available as follows.<p>
1.107 deraadt 1633:
1634: <ul>
1.113 deraadt 1635: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1636: <a href="events.html#usenix99">Usenix 1999</a>,
1637: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1638: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1639: <a href="papers/bcrypt-paper.ps">paper</a> and
1640: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1641: <p>
1642: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1643: <a href="events.html#usenix99">Usenix 1999</a>,
1644: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1645: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1646: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1647: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1648: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1649: <a href="papers/crypt-paper.ps">paper</a> and
1650: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1651: <p>
1652: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1653: <a href="events.html#usenix99">Usenix 1999</a>,
1654: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1655: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1656: <a href="papers/strlcpy-paper.ps">paper</a> and
1657: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1658: <p>
1.118 deraadt 1659: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1660: <a href="events.html#lisa99">LISA 1999</a>,
1661: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1662: <a href="papers/authgw-paper.ps">paper</a> and
1663: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1664: <p>
1.153 jufi 1665: <li>Encrypting Virtual Memory<br>
1.294 david 1666: <a href="events.html#sec2000">Usenix Security 2000</a>,
1667: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1668: <a href="papers/swapencrypt.ps">paper</a> and
1669: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1670: <p>
1.107 deraadt 1671: </ul>
1.294 david 1672: </ul>
1.106 deraadt 1673:
1.2 deraadt 1674: <hr>
1.294 david 1675: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1676: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1677: <br>
1.365 ! deraadt 1678: <small>$OpenBSD: security.html,v 1.364 2008/10/24 20:41:25 tobias Exp $</small>
1.1 deraadt 1679:
1.24 deraadt 1680: </body>
1681: </html>
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