Annotation of www/security.html, Revision 1.369
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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>
1.368 djm 242: <li><a href="errata44.html#007_openssl">January 9, 2009:
243: OpenSSL suffered from some logic errors that allowed bypass
244: of DSA/ECDSA certificate validation.</a>
1.367 brad 245: <li><a href="errata44.html#001_ndp">November 2, 2008:
246: The Neighbor Discovery Protocol (ndp) did not correctly verify
247: neighbor solicitation requests maybe allowing a nearby attacker
248: to intercept traffic.</a>
1.365 deraadt 249: </ul>
250:
251: <li>
1.357 brad 252: <a name="43"></a>
253:
254: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
255: These are the OpenBSD 4.3 advisories -- all these problems are solved
256: in <a href=anoncvs.html>OpenBSD current</a> and the
257: <a href=stable.html>patch branch</a>.
258:
259: <p>
260: <ul>
1.369 ! djm 261: <li><a href="errata43.html#007_openssl">January 9, 2009:
1.368 djm 262: OpenSSL suffered from some logic errors that allowed bypass
263: of DSA/ECDSA certificate validation.</a>
1.363 brad 264: <li><a href="errata43.html#005_ndp">October 2, 2008:
265: The Neighbor Discovery Protocol (ndp) did not correctly verify
266: neighbor solicitation requests maybe allowing a nearby attacker
267: to intercept traffic.</a>
1.362 brad 268: <li><a href="errata43.html#004_bind">July 23, 2008:
269: A vulnerability has been found with BIND.</a>
1.361 brad 270: <li><a href="errata43.html#003_xorg">July 15, 2008:
271: Multiple vulnerabilities in X.Org.</a>
1.359 brad 272: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 273: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 274: <li><a href="errata43.html#001_openssh">March 30, 2008:
275: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 276: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 277: </ul>
278:
1.366 miod 279: <p>
280: OpenBSD 4.2 and earlier releases are not supported anymore. The following
281: paragraphs only list advisories issued while they were maintained; these
282: releases are likely to be affected by the advisories for more recent releases.
283: <br>
1.357 brad 284:
285: <li>
1.348 merdely 286: <a name="42"></a>
287:
288: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
289: These are the OpenBSD 4.2 advisories -- all these problems are solved
290: in <a href=anoncvs.html>OpenBSD current</a> and the
291: <a href=stable.html>patch branch</a>.
292:
293: <p>
294: <ul>
1.364 tobias 295: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 296: The Neighbor Discovery Protocol (ndp) did not correctly verify
297: neighbor solicitation requests maybe allowing a nearby attacker
298: to intercept traffic.</a>
1.362 brad 299: <li><a href="errata42.html#013_bind">July 23, 2008:
300: A vulnerability has been found with BIND.</a>
1.361 brad 301: <li><a href="errata42.html#012_xorg2">July 15, 2008:
302: Multiple vulnerabilities in X.Org.</a>
1.359 brad 303: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 304: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 305: <li><a href="errata42.html#010_openssh">March 30, 2008:
306: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 307: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 308: <li><a href="errata42.html#009_ppp">March 7, 2008:
309: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 310: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
311: Multiple vulnerabilities in X.Org.</a>
1.352 henning 312: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
313: A missing NULL pointer check can lead to a kernel panic.</a>
314: <li><a href="errata42.html#004_pf">Nov 27, 2007:
315: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 316: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
317: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 318: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 319: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 320: </ul>
321:
322: <li>
1.346 matthieu 323: <a name="41"></a>
324:
325: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
326: These are the OpenBSD 4.1 advisories -- all these problems are solved
327: in <a href=anoncvs.html>OpenBSD current</a> and the
328: <a href=stable.html>patch branch</a>.
329:
330: <p>
331: <ul>
1.359 brad 332: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 333: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 334: <li><a href="errata41.html#015_openssh">March 30, 2008:
335: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 336: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 337: <li><a href="errata41.html#014_ppp">March 7, 2008:
338: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 339: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
340: Multiple vulnerabilities in X.Org.</a>
341: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
342: The SSL_get_shared_ciphers() function in OpenSSL contains
343: an off-by-one overflow.</a>
1.350 deraadt 344: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 345: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 346: <li><a href="errata41.html#009_file">Jul 9, 2007:
347: Fix possible heap overflow in file(1).</a>
1.346 matthieu 348: <li><a href="errata41.html#005_route6">Apr 27, 2007:
349: IPv6 type 0 route headers can be used to mount a DoS attack
350: against hosts and networks.</a>
351: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
352: Multiple vulnerabilities in X.Org.</a>
353: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
354: Incorrect mbuf handling for ICMP6 packets.</a>
355: </ul>
356:
357: <li>
1.334 brad 358: <a name="40"></a>
359: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
360: These are the OpenBSD 4.0 advisories -- all these problems are solved
361: in <a href=anoncvs.html>OpenBSD current</a> and the
362: <a href=stable.html>patch branch</a>.
363:
364: <p>
365: <ul>
1.350 deraadt 366: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 367: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 368: <li><a href="errata40.html#015_file">Jul 9, 2007:
369: Fix possible heap overflow in file(1).</a>
1.343 deraadt 370: <li><a href="errata40.html#012_route6">Apr 23, 2007:
371: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 372: against hosts and networks.</a>
1.342 mbalmer 373: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
374: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 375: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
376: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 377: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 378: Insufficient validation in vga(4) may allow an attacker to gain
379: root privileges on some i386 systems.</a>
1.339 deraadt 380: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 381: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 382: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 383: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
384: found by Chris Evans.</a>
1.339 deraadt 385: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 386: Several problems have been found in OpenSSL.</a>
1.339 deraadt 387: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 388: httpd(8) does not sanitize the Expect header from an HTTP request
389: when it is reflected back in an error message, which might allow
390: cross-site scripting (XSS) style attacks.</a>
391: </ul>
392:
393: <li>
1.321 brad 394: <a name="39"></a>
395:
396: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
397: These are the OpenBSD 3.9 advisories -- all these problems are solved
398: in <a href=anoncvs.html>OpenBSD current</a> and the
399: <a href=stable.html>patch branch</a>.
400:
401: <p>
402: <ul>
1.343 deraadt 403: <li><a href="errata39.html#022_route6">Apr 23, 2007:
404: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 405: against hosts and networks.</a>
1.342 mbalmer 406: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
407: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 408: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
409: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 410: <li><a href="errata39.html#agp">Jan 3, 2007:
411: Insufficient validation in vga(4) may allow an attacker to gain
412: root privileges on some i386 systems.</a>
1.336 brad 413: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 414: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 415: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 416: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 417: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 418: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 419: found by Chris Evans.</a>
1.333 deraadt 420: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 421: Several problems have been found in OpenSSL.</a>
1.333 deraadt 422: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 423: httpd(8) does not sanitize the Expect header from an HTTP request
424: when it is reflected back in an error message, which might allow
425: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 426: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 427: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
428: possible for an attacker to construct an invalid signature which
429: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 430: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 431: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 432: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 433: Due to the failure to correctly validate LCP configuration option
434: lengths, it is possible for an attacker to send LCP packets via an
435: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 436: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 437: A problem in isakmpd(8) caused IPsec to run partly without replay
438: protection.</a>
1.333 deraadt 439: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 440: It is possible to cause the kernel to panic when more than the default
441: number of sempahores have been allocated.</a>
1.333 deraadt 442: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 443: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
444: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
445: option.</a>
1.333 deraadt 446: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 447: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 448: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 449: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
450: overflow.</a>
1.333 deraadt 451: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 452: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 453: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 454: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 455: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 456: A race condition has been reported to exist in the handling by sendmail
457: of asynchronous signals.</a>
458: </ul>
459:
460: <li>
1.318 deraadt 461: <a name="38"></a>
462:
463: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
464: These are the OpenBSD 3.8 advisories -- all these problems are solved
465: in <a href=anoncvs.html>OpenBSD current</a> and the
466: <a href=stable.html>patch branch</a>.
467:
468: <p>
469: <ul>
1.332 brad 470: <li><a href="errata38.html#ssh2">Oct 12, 2006:
471: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 472: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 473: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 474: found by Chris Evans.</a>
475: <li><a href="errata38.html#openssl2">Oct 7, 2006:
476: Several problems have been found in OpenSSL.</a>
477: <li><a href="errata38.html#httpd2">Oct 7, 2006:
478: httpd(8) does not sanitize the Expect header from an HTTP request
479: when it is reflected back in an error message, which might allow
480: cross-site scripting (XSS) style attacks.</a>
1.329 brad 481: <li><a href="errata38.html#openssl">Sep 8, 2006:
482: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
483: possible for an attacker to construct an invalid signature which
484: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 485: <li><a href="errata38.html#bind">Sep 8, 2006:
486: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 487: <li><a href="errata38.html#sppp">Sep 2, 2006:
488: Due to the failure to correctly validate LCP configuration option
489: lengths, it is possible for an attacker to send LCP packets via an
490: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 491: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
492: A problem in isakmpd(8) caused IPsec to run partly without replay
493: protection.</a>
494: <li><a href="errata38.html#sem">Aug 25, 2006:
495: It is possible to cause the kernel to panic when more than the default
496: number of sempahores have been allocated.</a>
497: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
498: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
499: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
500: option.</a>
501: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
502: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 503: <li><a href="errata38.html#httpd">Jul 30, 2006:
504: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
505: overflow.</a>
1.324 brad 506: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
507: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 508: <li><a href="errata38.html#xorg">May 2, 2006:
509: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 510: <li><a href="errata38.html#sendmail">Mar 25, 2006:
511: A race condition has been reported to exist in the handling by sendmail
512: of asynchronous signals.</a>
513: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 514: Josh Bressers has reported a weakness in OpenSSH caused due to the
515: insecure use of the system(3) function in scp(1) when performing copy
516: operations using filenames that are supplied by the user from the
517: command line.</a>
1.321 brad 518: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 519: Do not allow users to trick suid programs into re-opening files via
520: /dev/fd.</a>
1.321 brad 521: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 522: A buffer overflow has been found in the Perl interpreter with the
523: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 524: </ul>
525:
526: <li>
1.312 david 527: <a name="37"></a>
528:
529: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
530: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 531: in <a href="anoncvs.html">OpenBSD current</a>. The
532: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
533: you should update your machine.
1.312 david 534:
535: <p>
536: <ul>
1.322 brad 537: <li><a href="errata37.html#xorg">May 2, 2006:
538: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 539: <li><a href="errata37.html#sendmail">Mar 25, 2006:
540: A race condition has been reported to exist in the handling by sendmail
541: of asynchronous signals.</a>
1.320 brad 542: <li><a href="errata37.html#ssh">Feb 12, 2006:
543: Josh Bressers has reported a weakness in OpenSSH caused due to the
544: insecure use of the system(3) function in scp(1) when performing copy
545: operations using filenames that are supplied by the user from the
546: command line.</a>
1.319 brad 547: <li><a href="errata37.html#fd">Jan 5, 2006:
548: Do not allow users to trick suid programs into re-opening files via
549: /dev/fd.</a>
550: <li><a href="errata37.html#perl">Jan 5, 2006:
551: A buffer overflow has been found in the Perl interpreter with the
552: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 553: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 554: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 555: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 556: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 557: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 558: Fix a race condition in sudo(8) that could allow a user
1.315 millert 559: to run arbitrary commands.</a>
1.318 deraadt 560: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 561: Fix a buffer overflow, memory leaks, and NULL pointer
562: dereference in cvs(1).</a>
1.312 david 563: </ul>
564:
565: <li>
1.301 miod 566: <a name="36"></a>
567:
568: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
569: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 570: in <a href="anoncvs.html">OpenBSD current</a>. The
571: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
572: you should update your machine.
1.301 miod 573:
574: <p>
1.302 markus 575: <ul>
1.317 millert 576: <li><a href="errata36.html#libz2">Jul 21, 2005:
577: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 578: <li><a href="errata36.html#libz">Jul 6, 2005:
579: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 580: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 581: Fix a race condition in sudo(8) that could allow a user
1.315 millert 582: to run arbitrary commands.</a>
1.311 deraadt 583: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 584: Fix a buffer overflow, memory leaks, and NULL pointer
585: dereference in cvs(1).</a>
1.311 deraadt 586: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 587: Due to buffer overflows in telnet(1), a malicious
588: server or man-in-the-middle attack could allow
589: execution of arbitrary code with the privileges of
590: the user invoking telnet(1).</a>
1.311 deraadt 591: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 592: More stringent checking should be done in the copy(9)
593: functions to prevent their misuse.</a>
1.311 deraadt 594: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 595: More stringent checking should be done in the copy(9)
596: functions to prevent their misuse.</a>
1.311 deraadt 597: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 598: httpd(8)'s mod_include module fails to properly validate
599: the length of user supplied tag strings prior to copying
1.305 brad 600: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 601: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 602: On systems running isakmpd(8) it is possible for a local
603: user to cause kernel memory corruption and system panic by
1.303 markus 604: setting ipsec(4) credentials on a socket.</a>
1.302 markus 605: </ul>
1.301 miod 606:
607: <li>
1.288 matthieu 608: <a name="35"></a>
1.279 deraadt 609:
1.294 david 610: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 611: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 612: in <a href="anoncvs.html">OpenBSD current</a>. The
613: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
614: you should update your machine.
1.279 deraadt 615:
616: <p>
617: <ul>
1.310 brad 618: <li><a href="errata35.html#cvs4">Apr 28, 2005:
619: Fix a buffer overflow, memory leaks, and NULL pointer
620: dereference in cvs(1).</a>
1.309 brad 621: <li><a href="errata35.html#telnet">Mar 30, 2005:
622: Due to buffer overflows in telnet(1), a malicious
623: server or man-in-the-middle attack could allow
624: execution of arbitrary code with the privileges of
625: the user invoking telnet(1).</a>
1.308 brad 626: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 627: More stringent checking should be done in the copy(9)
628: functions to prevent their misuse.</a>
1.306 brad 629: <li><a href="errata35.html#locore">Feb 28, 2005:
630: More stringent checking should be done in the copy(9)
631: functions to prevent their misuse.</a>
1.304 brad 632: <li><a href="errata35.html#httpd3">Jan 12, 2005:
633: httpd(8)'s mod_include module fails to properly validate
634: the length of user supplied tag strings prior to copying
1.305 brad 635: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 636: <li><a href="errata35.html#pfkey">Dec 14, 2004:
637: On systems running isakmpd(8) it is possible for a local
638: user to cause kernel memory corruption and system panic by
1.303 markus 639: setting ipsec(4) credentials on a socket.</a>
1.301 miod 640: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 641: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 642: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 643: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 644: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 645: httpd(8)'s mod_rewrite module can be made to write one zero byte in
646: an arbitrary memory position outside of a char array, causing a DoS
647: or possibly buffer overflows.</a>
1.301 miod 648: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 649: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 650: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 651: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 652: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 653: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 654: Multiple remote vulnerabilities have been found in the cvs(1)
655: server which can be used by CVS clients to crash or execute
1.293 brad 656: arbitrary code on the server.</a>
1.301 miod 657: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 658: kdc(8) performs inadequate checking of request fields, leading
659: to the possibility of principal impersonation from other
660: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 661: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 662: xdm(1) ignores the requestPort resource and creates a
1.293 brad 663: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 664: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 665: A buffer overflow in the cvs(1) server has been found,
666: which can be used by CVS clients to execute arbitrary code on
1.293 brad 667: the server.</a>
1.301 miod 668: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 669: Integer overflow problems were found in procfs, allowing
1.293 brad 670: reading of arbitrary kernel memory.</a>
1.301 miod 671: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 672: Pathname validation problems have been found in cvs(1),
673: allowing clients and servers access to files outside the
1.293 brad 674: repository or local CVS tree.</a>
1.279 deraadt 675: </ul>
676:
677: <p>
678: <li>
1.288 matthieu 679: <a name="34"></a>
1.261 david 680:
1.294 david 681: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 682: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 683: in <a href="anoncvs.html">OpenBSD current</a>. The
684: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
685: you should update your machine.
1.261 david 686: <p>
687: <ul>
1.302 markus 688: <li><a href="errata34.html#pfkey">Dec 14, 2004:
689: On systems running isakmpd(8) it is possible for a local
690: user to cause kernel memory corruption and system panic by
1.303 markus 691: setting ipsec(4) credentials on a socket.</a>
1.298 brad 692: <li><a href="errata34.html#xpm">Sep 16, 2004:
693: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 694: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
695: httpd(8)'s mod_rewrite module can be made to write one zero byte in
696: an arbitrary memory position outside of a char array, causing a DoS
697: or possibly buffer overflows.</a>
1.294 david 698: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 699: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 700: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 701: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 702: an attacker can delete IPsec tunnels at will.</a>
1.294 david 703: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 704: Multiple remote vulnerabilities have been found in the cvs(1)
705: server which can be used by CVS clients to crash or execute
1.293 brad 706: arbitrary code on the server.</a>
1.294 david 707: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 708: kdc(8) performs inadequate checking of request fields, leading
709: to the possibility of principal impersonation from other
710: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 711: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 712: A buffer overflow in the cvs(1) server has been found,
713: which can be used by CVS clients to execute arbitrary code on
714: the server.</a>
1.294 david 715: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 716: Integer overflow problems were found in procfs, allowing
717: reading of arbitrary kernel memory.</a>
1.294 david 718: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 719: Pathname validation problems have been found in cvs(1),
720: allowing clients and servers access to files outside the
721: repository or local CVS tree.</a>
1.294 david 722: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 723: A missing check for a NULL-pointer dereference may allow a
1.281 otto 724: remote attacker to crash applications using OpenSSL.</a>
1.294 david 725: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 726: Defects in the payload validation and processing functions of
727: isakmpd have been discovered. An attacker could send malformed
728: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 729: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 730: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
731: access module, using IP addresses without a netmask on big endian
732: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 733: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 734: An IPv6 MTU handling problem exists that could be used by an
735: attacker to cause a denial of service attack.</a>
1.294 david 736: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 737: A reference counting bug in shmat(2) could be used to write to
738: kernel memory under certain circumstances.</a>
1.294 david 739: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 740: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 741: by Thomas Walpuski.</a>
1.294 david 742: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 743: It may be possible for a local user to overrun the stack in
744: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 745: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 746: The use of certain ASN.1 encodings or malformed public keys may
747: allow an attacker to mount a denial of service attack against
748: applications linked with ssl(3).</a>
1.261 david 749: </ul>
750:
751: <li>
1.288 matthieu 752: <a name="33"></a>
1.246 deraadt 753:
1.294 david 754: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 755: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 756: in <a href="anoncvs.html">OpenBSD current</a>. The
757: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 758: you should update your machine.
1.246 deraadt 759: <p>
760: <ul>
1.294 david 761: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 762: Pathname validation problems have been found in cvs(1),
763: allowing clients and servers access to files outside the
764: repository or local CVS tree.</a>
1.294 david 765: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 766: A missing check for a NULL-pointer dereference may allow a
1.281 otto 767: remote attacker to crash applications using OpenSSL.</a>
1.294 david 768: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 769: Defects in the payload validation and processing functions of
770: isakmpd have been discovered. An attacker could send malformed
771: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 772: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 773: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
774: access module, using IP addresses without a netmask on big endian
775: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 776: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 777: An IPv6 MTU handling problem exists that could be used by an
778: attacker to cause a denial of service attack.</a>
1.294 david 779: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 780: A reference counting bug in shmat(2) could be used to write to
781: kernel memory under certain circumstances.</a>
1.294 david 782: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 783: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 784: by Thomas Walpuski.</a>
1.294 david 785: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 786: It may be possible for a local user to execute arbitrary code
787: resulting in escalation of privileges due to a stack overrun
788: in compat_ibcs2(8).</a>
1.294 david 789: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 790: The use of certain ASN.1 encodings or malformed public keys may
791: allow an attacker to mount a denial of service attack against
792: applications linked with ssl(3).</a>
1.294 david 793: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 794: Access of freed memory in pf(4) could be used to
1.260 margarid 795: remotely panic a machine using scrub rules.</a>
1.294 david 796: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 797: A buffer overflow in the address parsing in
798: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 799: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 800: OpenSSH versions prior to 3.7 contains a buffer management error
801: that is potentially exploitable.</a>
1.294 david 802: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 803: Root may be able to reduce the security level by taking advantage of
804: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 805: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 806: An improper bounds check in the kernel may allow a local user
807: to panic the kernel.</a>
1.294 david 808: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 809: An off-by-one error exists in the C library function realpath(3)
810: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 811: </ul>
812:
1.265 miod 813:
1.247 david 814: <p>
1.246 deraadt 815: <li>
1.288 matthieu 816: <a name="32"></a>
1.224 deraadt 817:
1.294 david 818: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 819: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 820: in <a href="anoncvs.html">OpenBSD current</a>. The
821: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 822: you should update your machine.
1.224 deraadt 823: <p>
824: <ul>
1.294 david 825: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 826: The use of certain ASN.1 encodings or malformed public keys may
827: allow an attacker to mount a denial of service attack against
828: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 829: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 830: Access of freed memory in pf(4) could be used to
1.260 margarid 831: remotely panic a machine using scrub rules.</a>
1.294 david 832: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 833: A buffer overflow in the address parsing in
834: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 835: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 836: OpenSSH versions prior to 3.7 contains a buffer management error
837: that is potentially exploitable.</a>
1.294 david 838: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 839: Fix for a potential security issue in
840: sendmail(8) with respect to DNS maps.</a>
1.294 david 841: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 842: An off-by-one error exists in the C library function realpath(3)
843: may allow an attacker to gain escalated privileges.</a>
1.294 david 844: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 845: A buffer overflow in the address parsing in
846: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 847: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 848: A cryptographic weaknesses in the Kerberos v4 protocol can be
849: exploited on Kerberos v5 as well.</a>
1.294 david 850: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 851: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 852: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 853: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 854: Various SSL and TLS operations in OpenSSL are vulnerable to
855: timing attacks.</a>
1.294 david 856: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 857: A buffer overflow in lprm(1) may allow an attacker to elevate
858: privileges to user daemon.</a>.
1.294 david 859: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 860: A buffer overflow in the envelope comments processing in
861: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 862: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 863: httpd(8) leaks file inode numbers via ETag header as well as
864: child PIDs in multipart MIME boundary generation. This could
865: lead, for example, to NFS exploitation because it uses inode
866: numbers as part of the file handle.</a>
1.294 david 867: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 868: In ssl(8) an information leak can occur via timing by performing
869: a MAC computation even if incorrect block cipher padding has
870: been found, this is a countermeasure. Also, check for negative
871: sizes, in allocation routines.</a>
1.294 david 872: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 873: A double free exists in cvs(1) that could lead to privilege
874: escalation for cvs configurations where the cvs command is
1.233 margarid 875: run as a privileged user.</a>
1.294 david 876: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 877: A buffer overflow exists in named(8) that could lead to a
878: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 879: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 880: A logic error in the pool kernel memory allocator could cause
881: memory corruption in low-memory situations, causing the system
882: to crash.</a>
1.294 david 883: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 884: An attacker can bypass smrsh(8)'s restrictions and execute
885: arbitrary commands with the privileges of his own account.</a>
1.294 david 886: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 887: Network bridges running pf with scrubbing enabled could cause
888: mbuf corruption, causing the system to crash.</a>
1.294 david 889: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 890: A buffer overflow can occur in the kadmind(8) daemon, leading
891: to possible remote crash or exploit.</a>
1.224 deraadt 892: </ul>
893:
1.227 miod 894: <p>
895: <li>
1.288 matthieu 896: <a name="31"></a>
1.203 deraadt 897:
1.294 david 898: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 899: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 900: in <a href="anoncvs.html">OpenBSD current</a>. The
901: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 902: you should update your machine.
1.203 deraadt 903:
904: <p>
905: <ul>
1.294 david 906: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 907: A buffer overflow in the address parsing in
908: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 909: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 910: A cryptographic weaknesses in the Kerberos v4 protocol can be
911: exploited on Kerberos v5 as well.</a>
1.294 david 912: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 913: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 914: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 915: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 916: Various SSL and TLS operations in OpenSSL are vulnerable to
917: timing attacks.</a>
1.294 david 918: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 919: A buffer overflow in lprm(1) may allow an attacker to gain
920: root privileges.</a>
1.294 david 921: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 922: A buffer overflow in the envelope comments processing in
923: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 924: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 925: In ssl(8) an information leak can occur via timing by performing
926: a MAC computation even if incorrect block cipher padding has
927: been found, this is a countermeasure. Also, check for negative
928: sizes, in allocation routines.</a>
1.294 david 929: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 930: A double free exists in cvs(1) that could lead to privilege
931: escalation for cvs configurations where the cvs command is
1.294 david 932: run as a privileged user</a>.
933: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 934: A buffer overflow exists in named(8) that could lead to a
935: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 936: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 937: Incorrect argument checking in the getitimer(2) system call
938: may allow an attacker to crash the system.</a>
1.294 david 939: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 940: An attacker can bypass smrsh(8)'s restrictions and execute
941: arbitrary commands with the privileges of his own account.</a>
1.294 david 942: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 943: A buffer overflow can occur in the kadmind(8) daemon, leading
944: to possible remote crash or exploit.</a>
1.294 david 945: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 946: Incorrect argument checking in the setitimer(2) system call
947: may allow an attacker to write to kernel memory.</a>
1.294 david 948: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 949: An insufficient boundary check in the select system call
1.220 miod 950: allows an attacker to overwrite kernel memory and execute arbitrary code
951: in kernel context.</a>
1.294 david 952: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 953: Several remote buffer overflows can occur in the SSL2 server and SSL3
954: client of the ssl(8) library, as in the ASN.1 parser code in the
955: crypto(3) library, all of them being potentially remotely
956: exploitable.</a>
1.294 david 957: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 958: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
959: possible remote crash.</a>
1.294 david 960: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 961: A race condition exists in the pppd(8) daemon which may cause it to
962: alter the file permissions of an arbitrary file.</a>
1.294 david 963: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 964: Receiving IKE payloads out of sequence can cause isakmpd(8) to
965: crash.</a>
1.294 david 966: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 967: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 968: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 969: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 970: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 971: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 972: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 973: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 974: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 975: input validation error that can result in an integer overflow and
976: privilege escalation.</a>
1.294 david 977: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 978: A buffer overflow can occur during the interpretation of chunked
979: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 980: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 981: Under certain conditions, on systems using YP with netgroups
982: in the password database, it is possible that sshd(8) does
983: ACL checks for the requested user name but uses the password
984: database entry of a different user for authentication. This
985: means that denied users might authenticate successfully
986: while permitted users could be locked out.</a>
1.294 david 987: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 988: A race condition exists that could defeat the kernel's
989: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 990: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 991: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 992: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 993: A local user can gain super-user privileges due to a buffer
994: overflow in sshd(8) if AFS has been configured on the system
995: or if KerberosTgtPassing or AFSTokenPassing has been enabled
996: in the sshd_config file.</a>
1.203 deraadt 997: </ul>
998:
1.235 miod 999: <p>
1.203 deraadt 1000: <li>
1.288 matthieu 1001: <a name="30"></a>
1.187 deraadt 1002:
1.294 david 1003: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 1004: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 1005: in <a href="anoncvs.html">OpenBSD current</a>. The
1006: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1007: you should update your machine.
1.187 deraadt 1008:
1009: <p>
1010: <ul>
1.294 david 1011: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1012: A buffer overflow exists in named(8) that could lead to a
1013: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1014: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1015: Incorrect argument checking in the getitimer(2) system call
1016: may allow an attacker to crash the system.</a>
1.294 david 1017: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1018: An attacker can bypass smrsh(8)'s restrictions and execute
1019: arbitrary commands with the privileges of his own account.</a>
1.294 david 1020: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1021: A buffer overflow can occur in the kadmind(8) daemon, leading
1022: to possible remote crash or exploit.</a>
1.294 david 1023: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1024: Incorrect argument checking in the setitimer(2) system call
1025: may allow an attacker to write to kernel memory.</a>
1.294 david 1026: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1027: An insufficient boundary check in the select and poll system calls
1028: allows an attacker to overwrite kernel memory and execute arbitrary code
1029: in kernel context.</a>
1.294 david 1030: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1031: Several remote buffer overflows can occur in the SSL2 server and SSL3
1032: client of the ssl(8) library, as in the ASN.1 parser code in the
1033: crypto(3) library, all of them being potentially remotely
1034: exploitable.</a>
1.294 david 1035: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1036: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1037: possible remote crash.</a>
1.294 david 1038: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1039: A race condition exists in the pppd(8) daemon which may cause it to
1040: alter the file permissions of an arbitrary file.</a>
1.294 david 1041: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1042: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1043: crash.</a>
1.294 david 1044: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1045: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1046: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1047: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1048: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1049: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1050: input validation error that can result in an integer overflow and
1051: privilege escalation.</a>
1.294 david 1052: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1053: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1054: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1055: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1056: A buffer overflow can occur during the interpretation of chunked
1057: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1058: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1059: A race condition exists that could defeat the kernel's
1060: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1061: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1062: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1063: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1064: A local user can gain super-user privileges due to a buffer
1065: overflow in sshd(8) if AFS has been configured on the system
1066: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1067: in the sshd_config file.</a>
1.294 david 1068: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1069: The mail(1) was interpreting tilde escapes even when invoked
1070: in non-interactive mode. As mail(1) is called as root from cron,
1071: this can lead to a local root compromise.</a>
1.294 david 1072: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1073: Under certain conditions, on systems using YP with netgroups in
1074: the password database, it is possible for the rexecd(8) and rshd(8)
1075: daemons to execute a shell from a password database entry for a
1076: different user. Similarly, atrun(8) may change to the wrong
1077: home directory when running jobs.</a>
1.294 david 1078: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1079: A potential double free() exists in the zlib library;
1080: this is not exploitable on OpenBSD.
1081: The kernel also contains a copy of zlib; it is not
1082: currently known if the kernel zlib is exploitable.</a>
1.294 david 1083: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1084: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1085: may allow a local user to gain super-user privileges.</a>
1.294 david 1086: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1087: A race condition between the ptrace(2) and execve(2) system calls
1088: allows an attacker to modify the memory contents of suid/sgid
1089: processes which could lead to compromise of the super-user account.</a>
1.294 david 1090: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1091: There is a security hole in sudo(8) that can be exploited
1092: when the Postfix sendmail replacement is installed that may
1093: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1094: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1095: An attacker can trick a machine running the lpd daemon into
1096: creating new files in the root directory from a machine with
1097: remote line printer access.</a>
1.294 david 1098: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1099: The vi.recover script can be abused in such a way as
1100: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1101: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1102: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1103: resulting in a crash.</a>
1.294 david 1104: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1105: A security hole that may allow an attacker to partially authenticate
1106: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1107: </ul>
1108:
1109: <p>
1110: <li>
1.288 matthieu 1111: <a name="29"></a>
1.173 deraadt 1112:
1.294 david 1113: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1114: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1115: in <a href="anoncvs.html">OpenBSD current</a>. The
1116: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1117: you should update your machine.
1118:
1.173 deraadt 1119:
1120: <p>
1121: <ul>
1.294 david 1122: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1123: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1124: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1125: A race condition exists that could defeat the kernel's
1126: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1127: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1128: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1129: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1130: A local user can gain super-user privileges due to a buffer
1131: overflow in sshd(8) if AFS has been configured on the system
1132: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1133: in the sshd_config file.</a>
1.294 david 1134: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1135: The mail(1) was interpreting tilde escapes even when invoked
1136: in non-interactive mode. As mail(1) is called as root from cron,
1137: this can lead to a local root compromise.</a>
1.294 david 1138: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1139: A potential double free() exists in the zlib library;
1140: this is not exploitable on OpenBSD.
1141: The kernel also contains a copy of zlib; it is not
1142: currently known if the kernel zlib is exploitable.</a>
1.294 david 1143: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1144: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1145: may allow a local user to gain super-user privileges.</a>
1.294 david 1146: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1147: A race condition between the ptrace(2) and execve(2) system calls
1148: allows an attacker to modify the memory contents of suid/sgid
1149: processes which could lead to compromise of the super-user account.</a>
1.294 david 1150: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1151: There is a security hole in sudo(8) that can be exploited
1152: when the Postfix sendmail replacement is installed that may
1153: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1154: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1155: An attacker can trick a machine running the lpd daemon into
1156: creating new files in the root directory from a machine with
1157: remote line printer access.</a>
1.294 david 1158: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1159: The vi.recover script can be abused in such a way as
1160: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1161: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1162: A security hole exists in uuxqt(8) that may allow an
1163: attacker to gain root privileges.</a>
1.294 david 1164: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1165: A security hole exists in lpd(8) that may allow an
1166: attacker to gain root privileges if lpd is running.</a>
1.294 david 1167: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1168: A security hole exists in sendmail(8) that may allow an
1169: attacker on the local host to gain root privileges.</a>
1.294 david 1170: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1171: A kernel buffer overflow in the NFS code can be used to execute
1172: arbitrary code by users with mount privileges (only root by
1.181 millert 1173: default).</a>
1.294 david 1174: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1175: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1176: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1177: sshd(8) allows users to delete arbitrary files named "cookies"
1178: if X11 forwarding is enabled. X11 forwarding is disabled
1179: by default.</a>
1.294 david 1180: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1181: Programs using the fts routines can be tricked into changing
1182: into the wrong directory.</a>
1.294 david 1183: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1184: Sendmail signal handlers contain unsafe code,
1185: leading to numerous race conditions.</a>
1.173 deraadt 1186: </ul>
1187:
1188: <p>
1189: <li>
1.288 matthieu 1190: <a name="28"></a>
1.152 deraadt 1191:
1.294 david 1192: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1193: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1194: in <a href="anoncvs.html">OpenBSD current</a>. The
1195: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1196: you should update your machine.
1197:
1.152 deraadt 1198:
1199: <p>
1200: <ul>
1.294 david 1201: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1202: A security hole exists in uuxqt(8) that may allow an
1203: attacker to gain root privileges.</a>
1.294 david 1204: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1205: A security hole exists in lpd(8) that may allow an
1206: attacker to gain root privileges if lpd is running.</a>
1.294 david 1207: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1208: A security hole exists in sendmail(8) that may allow an
1209: attacker on the local host to gain root privileges.</a>
1.294 david 1210: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1211: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1212: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1213: Programs using the fts routines can be tricked into changing
1214: into the wrong directory.</a>
1.294 david 1215: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1216: Sendmail signal handlers contain unsafe code,
1217: leading to numerous race conditions.</a>
1.294 david 1218: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1219: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1220: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1221: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1222: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1223: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1224: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1225: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1226: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1227: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1228: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1229: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1230: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1231: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1232: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1233: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1234: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1235: rnd(4) did not use all of its input when written to.</a>
1.294 david 1236: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1237: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1238: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1239: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1240: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1241: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1242: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1243: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1244: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1245: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1246: </ul>
1247:
1248: <p>
1249: <li>
1.288 matthieu 1250: <a name="27"></a>
1.124 deraadt 1251:
1.294 david 1252: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1253: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1254: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1255: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1256:
1257: <p>
1258: <ul>
1.294 david 1259: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1260: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1261: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1262: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1263: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1264: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1265: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1266: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1267: (patch included)</a>
1.294 david 1268: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1269: X11 libraries have 2 potential overflows in xtrans code.
1270: (patch included)</a>
1.294 david 1271: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1272: Apache mod_rewrite and mod_vhost_alias modules could expose files
1273: on the server in certain configurations if used.
1274: (patch included)</a>
1.294 david 1275: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1276: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1277: TERMPATH and TERMCAP environment variables as it should.
1278: (patch included)</a>
1.294 david 1279: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1280: There are printf-style format string bugs in several privileged
1281: programs. (patch included)</a>
1.294 david 1282: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1283: libcurses honored terminal descriptions in the $HOME/.terminfo
1284: directory as well as in the TERMCAP environment variable for
1285: setuid and setgid applications.
1.146 deraadt 1286: (patch included)</a>
1.294 david 1287: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1288: A format string vulnerability exists in talkd(8).
1289: (patch included)</a>
1.294 david 1290: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1291: A format string vulnerability exists in the pw_error() function of the
1292: libutil library, yielding localhost root through chpass(1).
1293: (patch included)</a>
1.294 david 1294: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1295: Bad ESP/AH packets could cause a crash under certain conditions.
1296: (patch included)</a>
1.294 david 1297: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1298: A format string vulnerability (localhost root) exists in xlock(1).
1299: (patch included)</a>
1.294 david 1300: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1301: Various bugs found in X11 libraries have various side effects, almost
1302: completely denial of service in OpenBSD.
1303: (patch included)</a>
1.294 david 1304: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1305: Just like pretty much all the other unix ftp daemons
1306: on the planet, ftpd had a remote root hole in it.
1307: Luckily, ftpd was not enabled by default.
1.137 deraadt 1308: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1309: (patch included)</a>
1.294 david 1310: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1311: Mopd, very rarely used, contained some buffer overflows.
1312: (patch included)</a>
1.294 david 1313: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1314: libedit would check for a <b>.editrc</b> file in the current
1315: directory. Not known to be a real security issue, but a patch
1316: is available anyways.
1317: (patch included)</a>
1.294 david 1318: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1319: A serious bug in dhclient(8) could allow strings from a
1320: malicious dhcp server to be executed in the shell as root.
1321: (patch included)</a>
1.294 david 1322: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1323: A serious bug in isakmpd(8) policy handling wherein
1324: policy verification could be completely bypassed in isakmpd.
1325: (patch included)</a>
1.294 david 1326: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1327: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1328: should not be used, and results in security problems on
1329: other operating systems.</a>
1.294 david 1330: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1331: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1332: (patch included)</a>
1.294 david 1333: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1334: Improper use of ipf <i>keep-state</i> rules can result
1335: in firewall rules being bypassed. (patch included)</a>
1336:
1.124 deraadt 1337: </ul>
1338:
1339: <p>
1340: <li>
1.288 matthieu 1341: <a name="26"></a>
1.119 deraadt 1342:
1.294 david 1343: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1344: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1345: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1346: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1347:
1348: <p>
1349: <ul>
1.294 david 1350: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1351: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1352: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1353: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1354: Improper use of ipf <i>keep-state</i> rules can result
1355: in firewall rules being bypassed. (patch included)</a>
1.294 david 1356: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1357: xlockmore has a bug which a localhost attacker can use to gain
1358: access to the encrypted root password hash (which is normally
1.245 miod 1359: encoded using blowfish</a> (see
1.294 david 1360: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1361: crypt(3)</a>)
1.245 miod 1362: (patch included).
1.294 david 1363: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1364: Systems running with procfs enabled and mounted are
1365: vulnerable to a very tricky exploit. procfs is not
1366: mounted by default.
1367: (patch included).</a>
1.294 david 1368: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1369: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1370: thus exposing the system to a race where the aliases file
1371: did not exist.
1.119 deraadt 1372: (patch included).</a>
1.294 david 1373: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1374: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1375: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1376: A buffer overflow in the RSAREF code included in the
1377: USA version of libssl, is possibly exploitable in
1378: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1379: (patch included).<br></a>
1380: <strong>Update:</strong> Turns out that this was not exploitable
1381: in any of the software included in OpenBSD 2.6.
1.294 david 1382: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1383: Any user could change interface media configurations, resulting in
1384: a localhost denial of service attack.
1.121 deraadt 1385: (patch included).</a>
1.119 deraadt 1386: </ul>
1387:
1388: <p>
1389: <li>
1.288 matthieu 1390: <a name="25"></a>
1.106 deraadt 1391:
1.294 david 1392: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1393: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1394: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1395: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1396:
1.96 deraadt 1397: <p>
1.104 deraadt 1398: <ul>
1.294 david 1399: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1400: In cron(8), make sure argv[] is NULL terminated in the
1401: fake popen() and run sendmail as the user, not as root.
1402: (patch included).</a>
1.294 david 1403: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1404: filesystems had an overrun in their handling of uio_offset
1405: in their readdir() routines. (These filesystems are not
1406: enabled by default). (patch included).</a>
1.294 david 1407: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1408: when we execve() a new process. (patch included).</a>
1.294 david 1409: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1410: been handled by IPsec may be transmitted as cleartext.
1411: PF_KEY SA expirations may leak kernel resources.
1412: (patch included).</a>
1.294 david 1413: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1414: motd re-writing and change the find(1) to use -execdir
1415: (patch included).</a>
1.294 david 1416: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1417: users to chflags(2) or fchflags(2) on character or block devices
1418: which they may currently be the owner of (patch included).</a>
1.294 david 1419: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1420: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1421: </ul>
1422:
1.106 deraadt 1423: <p>
1424: <li>
1.288 matthieu 1425: <a name="24"></a>
1.235 miod 1426:
1.294 david 1427: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1428: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1429: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1430: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1431:
1.96 deraadt 1432: <p>
1.75 deraadt 1433: <ul>
1.294 david 1434: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1435: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1436: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1437: another kernel crash case caused by the <strong>crashme</strong>
1438: program (patch included).</a>
1.294 david 1439: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1440: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1441: (patch included).</a>
1.294 david 1442: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1443: existed in ping(8). (patch included).</a>
1.294 david 1444: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1445: the ipq, which could permit an attacker to cause a crash.
1446: (patch included).</a>
1.294 david 1447: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1448: kernel between accept(2) and select(2) could permit an attacker
1449: to hang sockets from remote.
1450: (patch included).</a>
1.294 david 1451: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1452: bog the machine excessively and cause problems.
1453: (patch included).</a>
1.294 david 1454: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1455: DDB interacted to possibly cause a crash.
1456: (patch included).</a>
1.294 david 1457: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1458: (patch included).</a>
1.294 david 1459: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1460: problem in bootpd(8). (patch included).</a>
1.294 david 1461: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1462: exploitable problem relating to environment variables in termcap
1463: and curses. (patch included).</a>
1.294 david 1464: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1465: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1466: </ul>
1467:
1.106 deraadt 1468: <p>
1469: <li>
1.288 matthieu 1470: <a name="23"></a>
1.235 miod 1471:
1.294 david 1472: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1473: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1474: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1475: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1476:
1.96 deraadt 1477: <p>
1.53 matthieu 1478: <ul>
1.294 david 1479: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1480: problem in bootpd(8). (patch included).</a>
1.294 david 1481: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1482: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1483: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1484: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1485: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1486: chpass(1) has a file descriptor leak which allows an
1487: attacker to modify /etc/master.passwd.</a>
1.294 david 1488: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1489: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1490: should not be executed with fd slots 0, 1, or 2 free.
1491: (patch included).</a>
1.294 david 1492: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1493: libraries (patches included).</a>
1.294 david 1494: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1495: processes too permissive (4th revision patch included).</a>
1.294 david 1496: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1497: of immutable and append-only file flags. (patch included).</a>
1.294 david 1498: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1499: if IPSEC is enabled (patch included).</a>
1.294 david 1500: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1501: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1502: </ul>
1.9 deraadt 1503:
1.106 deraadt 1504: <p>
1505: <li>
1.288 matthieu 1506: <a name="22"></a>
1.235 miod 1507:
1.294 david 1508: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1509: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1510: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1511: still exist in other operating systems. (The supplied patches are for
1512: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1513:
1.96 deraadt 1514: <p>
1.9 deraadt 1515: <ul>
1.294 david 1516: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1517: packets if IPSEC is enabled (patch included).</a>
1.294 david 1518: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1519: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1520: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1521: (patch included).</a>
1.294 david 1522: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1523: (patch included).</a>
1.294 david 1524: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1525: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1526: (patch included).</a>
1.294 david 1527: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1528: export (patch included).</a>
1.112 philen 1529: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1530: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1531: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1532: Acceptance.</a>
1.294 david 1533: A patch is available <a href="errata22.html#sourceroute">here</a>.
1534: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1535: flaw (patch included).</a>
1.294 david 1536: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1537: </ul>
1538:
1.106 deraadt 1539: <p>
1540: <li>
1.288 matthieu 1541: <a name="21"></a>
1.235 miod 1542:
1.294 david 1543: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1544: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1545: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1546: exist in other operating systems. (If you are running OpenBSD 2.1, we
1547: would strongly recommend an upgrade to the newest release, as this
1548: patch list only attempts at fixing the most important security
1549: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1550: security problems. Many of those problems were solved in ways which
1551: make it hard for us to provide patches).
1552:
1.96 deraadt 1553: <p>
1.52 deraadt 1554: <ul>
1.112 philen 1555: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1556: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1557: (patch included)</a>
1.112 philen 1558: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1559: </ul>
1.51 deraadt 1560:
1.106 deraadt 1561: <p>
1562: <li>
1.288 matthieu 1563: <a name="20"></a>
1.235 miod 1564:
1.294 david 1565: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1566: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1567: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1568: exist in other operating systems. (If you are running OpenBSD 2.0, we
1569: commend you for being there back in the old days!, but you're really
1570: missing out if you don't install a new version!)
1571:
1572: <p>
1573: <ul>
1.112 philen 1574: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1575: resolver (patch included)</a>
1576: <li>Many others... if people can hunt them down, please let me know
1577: and we'll put them up here.
1578: </ul>
1.51 deraadt 1579: <p>
1.106 deraadt 1580:
1.288 matthieu 1581: <a name="watching"></a>
1.294 david 1582: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1583:
1.21 deraadt 1584: Since we take a proactive stance with security, we are continually
1585: finding and fixing new security problems. Not all of these problems
1.80 espie 1586: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1587: confirmed to be exploitable; many simple bugs we fix do turn out to
1588: have security consequences we could not predict. We do not have the
1589: time resources to make these changes available in the above format.<p>
1.21 deraadt 1590:
1591: Thus there are usually minor security fixes in the current source code
1592: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1593: guarantee that these problems are of minimal impact and unproven
1.44 ian 1594: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1595: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1596:
1.45 deraadt 1597: People who are really concerned with security can do a number of
1598: things:<p>
1.21 deraadt 1599:
1600: <ul>
1601: <li>If you understand security issues, watch our
1.294 david 1602: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1603: eye out for things which appear security related. Since
1.21 deraadt 1604: exploitability is not proven for many of the fixes we make,
1605: do not expect the relevant commit message to say "SECURITY FIX!".
1606: If a problem is proven and serious, a patch will be available
1607: here very shortly after.
1.161 horacio 1608: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1609: security-announce mailing list</a> which will notify you for every
1.186 ian 1610: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1611: and instruct you on how to patch the problem.
1.21 deraadt 1612: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1613: complete system build from time to time (read /usr/src/Makefile
1614: carefully). Users can make the assumption that the current
1615: source tree always has stronger security than the previous release.
1.45 deraadt 1616: However, building your own system from source code is not trivial;
1.265 miod 1617: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1618: transition between major releases.
1.115 ericj 1619: <li>Install a binary snapshot for your
1.80 espie 1620: architecture, which are made available fairly often. For
1.29 deraadt 1621: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1622: </ul>
1623:
1.9 deraadt 1624: <p>
1.288 matthieu 1625: <a name="reporting"></a>
1.294 david 1626: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1627:
1.5 deraadt 1628: <p> If you find a new security problem, you can mail it to
1.294 david 1629: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1630: <br>
1.5 deraadt 1631: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1632: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1633:
1.107 deraadt 1634: <p>
1.288 matthieu 1635: <a name="papers"></a>
1.294 david 1636: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1637:
1638: A number of papers have been written by OpenBSD team members, about security
1639: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1640: documents are available as follows.<p>
1.107 deraadt 1641:
1642: <ul>
1.113 deraadt 1643: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1644: <a href="events.html#usenix99">Usenix 1999</a>,
1645: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1646: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1647: <a href="papers/bcrypt-paper.ps">paper</a> and
1648: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1649: <p>
1650: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1651: <a href="events.html#usenix99">Usenix 1999</a>,
1652: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1653: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1654: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1655: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1656: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1657: <a href="papers/crypt-paper.ps">paper</a> and
1658: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1659: <p>
1660: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1661: <a href="events.html#usenix99">Usenix 1999</a>,
1662: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1663: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1664: <a href="papers/strlcpy-paper.ps">paper</a> and
1665: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1666: <p>
1.118 deraadt 1667: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1668: <a href="events.html#lisa99">LISA 1999</a>,
1669: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1670: <a href="papers/authgw-paper.ps">paper</a> and
1671: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1672: <p>
1.153 jufi 1673: <li>Encrypting Virtual Memory<br>
1.294 david 1674: <a href="events.html#sec2000">Usenix Security 2000</a>,
1675: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1676: <a href="papers/swapencrypt.ps">paper</a> and
1677: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1678: <p>
1.107 deraadt 1679: </ul>
1.294 david 1680: </ul>
1.106 deraadt 1681:
1.2 deraadt 1682: <hr>
1.294 david 1683: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1684: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1685: <br>
1.369 ! djm 1686: <small>$OpenBSD: security.html,v 1.368 2009/01/10 01:34:49 djm Exp $</small>
1.1 deraadt 1687:
1.24 deraadt 1688: </body>
1689: </html>