Annotation of www/security.html, Revision 1.362
1.294 david 1: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
2: "http://www.w3.org/TR/html4/loose.dtd">
1.1 deraadt 3: <html>
4: <head>
1.20 deraadt 5: <title>OpenBSD Security</title>
1.294 david 6: <link rev=made href="mailto:www@openbsd.org">
1.345 tom 7: <link rel="alternate" type="application/rss+xml" title="OpenBSD errata (external)" href="http://www.undeadly.org/cgi?action=errata">
1.294 david 8: <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
1.1 deraadt 9: <meta name="resource-type" content="document">
10: <meta name="description" content="OpenBSD advisories">
11: <meta name="keywords" content="openbsd,main">
12: <meta name="distribution" content="global">
1.355 miod 13: <meta name="copyright" content="This document copyright 1997-2008 by OpenBSD.">
1.1 deraadt 14: </head>
15:
1.274 david 16: <body bgcolor="#ffffff" text="#000000" link="#23238E">
1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.280 david 57: <a href="#34">3.4</a>,
1.301 miod 58: <a href="#35">3.5</a>,
1.312 david 59: <a href="#36">3.6</a>,
1.318 deraadt 60: <a href="#37">3.7</a>,
1.321 brad 61: <a href="#38">3.8</a>,
1.334 brad 62: <a href="#39">3.9</a>,
1.348 merdely 63: <a href="#40">4.0</a>,
64: <a href="#41">4.1</a>,
1.357 brad 65: <a href="#42">4.2</a>,
66: <a href="#43">4.3</a>.
1.114 philen 67: </td>
68: </tr>
69: </table>
1.56 deraadt 70: <hr>
71:
1.294 david 72: <a name="goals"></a>
1.278 deraadt 73: <ul>
1.294 david 74: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 75:
1.14 deraadt 76: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 77: ONE in the industry for security (if we are not already there). Our
78: open software development model permits us to take a more
79: uncompromising view towards increased security than Sun, SGI, IBM, HP,
80: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 81: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 82: cryptography</a>, we are able to take cryptographic approaches towards
83: fixing security problems.<p>
1.18 deraadt 84:
1.288 matthieu 85: <a name="disclosure"></a>
1.294 david 86: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 87:
1.45 deraadt 88: Like many readers of the
1.196 jufi 89: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 90: BUGTRAQ mailing list</a>,
1.106 deraadt 91: we believe in full disclosure of security problems. In the
92: operating system arena, we were probably the first to embrace
93: the concept. Many vendors, even of free software, still try
94: to hide issues from their users.<p>
95:
96: Security information moves very fast in cracker circles. On the other
97: hand, our experience is that coding and releasing of proper security
98: fixes typically requires about an hour of work -- very fast fix
99: turnaround is possible. Thus we think that full disclosure helps the
100: people who really care about security.<p>
101:
1.288 matthieu 102: <a name="process"></a>
1.294 david 103: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 104:
1.12 deraadt 105: Our security auditing team typically has between six and twelve
1.45 deraadt 106: members who continue to search for and fix new security holes. We
107: have been auditing since the summer of 1996. The process we follow to
108: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 109: every critical software component. We are not so much looking for
110: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 111: years later someone discovers the problem used to be a security
1.106 deraadt 112: issue, and we fixed it because it was just a bug, well, all the
113: better. Flaws have been found in just about every area of the system.
114: Entire new classes of security problems have been found during our
115: audit, and often source code which had been audited earlier needs
116: re-auditing with these new flaws in mind. Code often gets audited
117: multiple times, and by multiple people with different auditing
118: skills.<p>
1.12 deraadt 119:
1.94 deraadt 120: Some members of our security auditing team worked for Secure Networks,
121: the company that made the industry's premier network security scanning
122: software package Ballista (Secure Networks got purchased by Network
123: Associates, Ballista got renamed to Cybercop Scanner, and well...)
124: That company did a lot of security research, and thus fit in well
1.106 deraadt 125: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
126: colours since day 1.<p>
1.31 deraadt 127:
1.34 deraadt 128: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 129: In most cases we have found that the determination of exploitability
130: is not an issue. During our ongoing auditing process we find many
131: bugs, and endeavor to fix them even though exploitability is not
132: proven. We fix the bug, and we move on to find other bugs to fix. We
133: have fixed many simple and obvious careless programming errors in code
134: and only months later discovered that the problems were in fact
135: exploitable. (Or, more likely someone on
1.197 jufi 136: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 137: would report that other operating systems were vulnerable to a `newly
138: discovered problem', and then it would be discovered that OpenBSD had
139: been fixed in a previous release). In other cases we have been saved
140: from full exploitability of complex step-by-step attacks because we
141: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 142: managed such a success is the lpd advisory that Secure Networks put out.
143: <p>
1.29 deraadt 144:
1.288 matthieu 145: <a name="newtech"></a>
1.294 david 146: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 147:
148: As we audit source code, we often invent new ways of solving problems.
149: Sometimes these ideas have been used before in some random application
150: written somewhere, but perhaps not taken to the degree that we do.
151: <p>
152:
153: <ul>
154: <li>strlcpy() and strlcat()
155: <li>Memory protection purify
156: <ul>
157: <li>W^X
158: <li>.rodata segment
159: <li>Guard pages
160: <li>Randomized malloc()
161: <li>Randomized mmap()
162: <li>atexit() and stdio protection
163: </ul>
1.295 otto 164: <li>Privilege separation
1.278 deraadt 165: <li>Privilege revocation
166: <li>Chroot jailing
167: <li>New uids
168: <li>ProPolice
169: <li>... and others
170: </ul>
171: <p>
172:
1.294 david 173: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 174:
1.45 deraadt 175: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 176: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 177: commonplace in security forums like
1.197 jufi 178: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 179:
1.45 deraadt 180: The most intense part of our security auditing happened immediately
1.80 espie 181: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 182: over the last third of 1996 and first half of 1997. Thousands (yes,
183: thousands) of security issues were fixed rapidly over this year-long
184: period; bugs like the standard buffer overflows, protocol
185: implementation weaknesses, information gathering, and filesystem
186: races. Hence most of the security problems that we encountered were
187: fixed before our 2.1 release, and then a far smaller number needed
188: fixing for our 2.2 release. We do not find as many problems anymore,
189: it is simply a case of diminishing returns. Recently the security
190: problems we find and fix tend to be significantly more obscure or
191: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 192:
1.35 deraadt 193: <ul>
1.45 deraadt 194: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 195: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 196: to search for more complicated exploits, so we will too.
197: <li>Finding and fixing subtle flaws in complicated software is
198: a lot of fun.
1.35 deraadt 199: </ul>
1.106 deraadt 200: <p>
1.15 deraadt 201:
1.14 deraadt 202: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 203: to find and fix new security flaws.<p>
1.12 deraadt 204:
1.288 matthieu 205: <a name="default"></a>
1.294 david 206: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 207:
208: To ensure that novice users of OpenBSD do not need to become security
209: experts overnight (a viewpoint which other vendors seem to have), we
210: ship the operating system in a Secure by Default mode. All non-essential
211: services are disabled. As the user/administrator becomes more familiar
212: with the system, he will discover that he has to enable daemons and other
213: parts of the system. During the process of learning how to enable a new
214: service, the novice is more likely to learn of security considerations.<p>
215:
216: This is in stark contrast to the increasing number of systems that
217: ship with NFS, mountd, web servers, and various other services enabled
218: by default, creating instantaneous security problems for their users
219: within minutes after their first install.<p>
220:
1.288 matthieu 221: <a name="crypto"></a>
1.294 david 222: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 223:
224: And of course, since the OpenBSD project is based in Canada, it is possible
225: for us to integrate cryptography. For more information, read the page
1.116 deraadt 226: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 227:
1.294 david 228: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 229:
230: <li>
1.357 brad 231: <a name="43"></a>
232:
233: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
234: These are the OpenBSD 4.3 advisories -- all these problems are solved
235: in <a href=anoncvs.html>OpenBSD current</a> and the
236: <a href=stable.html>patch branch</a>.
237:
238: <p>
239: <ul>
1.362 ! brad 240: <li><a href="errata43.html#004_bind">July 23, 2008:
! 241: A vulnerability has been found with BIND.</a>
1.361 brad 242: <li><a href="errata43.html#003_xorg">July 15, 2008:
243: Multiple vulnerabilities in X.Org.</a>
1.359 brad 244: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 245: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 246: <li><a href="errata43.html#001_openssh">March 30, 2008:
247: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 248: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 249: </ul>
250:
251:
252: <li>
1.348 merdely 253: <a name="42"></a>
254:
255: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
256: These are the OpenBSD 4.2 advisories -- all these problems are solved
257: in <a href=anoncvs.html>OpenBSD current</a> and the
258: <a href=stable.html>patch branch</a>.
259:
260: <p>
261: <ul>
1.362 ! brad 262: <li><a href="errata42.html#013_bind">July 23, 2008:
! 263: A vulnerability has been found with BIND.</a>
1.361 brad 264: <li><a href="errata42.html#012_xorg2">July 15, 2008:
265: Multiple vulnerabilities in X.Org.</a>
1.359 brad 266: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 267: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 268: <li><a href="errata42.html#010_openssh">March 30, 2008:
269: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 270: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 271: <li><a href="errata42.html#009_ppp">March 7, 2008:
272: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 273: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
274: Multiple vulnerabilities in X.Org.</a>
1.352 henning 275: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
276: A missing NULL pointer check can lead to a kernel panic.</a>
277: <li><a href="errata42.html#004_pf">Nov 27, 2007:
278: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 279: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
280: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 281: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 282: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 283: </ul>
284:
285: <li>
1.346 matthieu 286: <a name="41"></a>
287:
288: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
289: These are the OpenBSD 4.1 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>
1.359 brad 295: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 296: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 297: <li><a href="errata41.html#015_openssh">March 30, 2008:
298: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 299: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 300: <li><a href="errata41.html#014_ppp">March 7, 2008:
301: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 302: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
303: Multiple vulnerabilities in X.Org.</a>
304: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
305: The SSL_get_shared_ciphers() function in OpenSSL contains
306: an off-by-one overflow.</a>
1.350 deraadt 307: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 308: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 309: <li><a href="errata41.html#009_file">Jul 9, 2007:
310: Fix possible heap overflow in file(1).</a>
1.346 matthieu 311: <li><a href="errata41.html#005_route6">Apr 27, 2007:
312: IPv6 type 0 route headers can be used to mount a DoS attack
313: against hosts and networks.</a>
314: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
315: Multiple vulnerabilities in X.Org.</a>
316: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
317: Incorrect mbuf handling for ICMP6 packets.</a>
318: </ul>
319:
1.355 miod 320: <p>
321: OpenBSD 4.0 and earlier releases are not supported anymore. The following
322: paragraphs only list advisories issued while they were maintained; these
323: releases are likely to be affected by the advisories for more recent releases.
324: <br>
325:
1.346 matthieu 326: <li>
1.334 brad 327: <a name="40"></a>
328: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
329: These are the OpenBSD 4.0 advisories -- all these problems are solved
330: in <a href=anoncvs.html>OpenBSD current</a> and the
331: <a href=stable.html>patch branch</a>.
332:
333: <p>
334: <ul>
1.350 deraadt 335: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 336: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 337: <li><a href="errata40.html#015_file">Jul 9, 2007:
338: Fix possible heap overflow in file(1).</a>
1.343 deraadt 339: <li><a href="errata40.html#012_route6">Apr 23, 2007:
340: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 341: against hosts and networks.</a>
1.342 mbalmer 342: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
343: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 344: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
345: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 346: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 347: Insufficient validation in vga(4) may allow an attacker to gain
348: root privileges on some i386 systems.</a>
1.339 deraadt 349: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 350: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 351: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 352: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
353: found by Chris Evans.</a>
1.339 deraadt 354: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 355: Several problems have been found in OpenSSL.</a>
1.339 deraadt 356: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 357: httpd(8) does not sanitize the Expect header from an HTTP request
358: when it is reflected back in an error message, which might allow
359: cross-site scripting (XSS) style attacks.</a>
360: </ul>
361:
362: <li>
1.321 brad 363: <a name="39"></a>
364:
365: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
366: These are the OpenBSD 3.9 advisories -- all these problems are solved
367: in <a href=anoncvs.html>OpenBSD current</a> and the
368: <a href=stable.html>patch branch</a>.
369:
370: <p>
371: <ul>
1.343 deraadt 372: <li><a href="errata39.html#022_route6">Apr 23, 2007:
373: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 374: against hosts and networks.</a>
1.342 mbalmer 375: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
376: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 377: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
378: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 379: <li><a href="errata39.html#agp">Jan 3, 2007:
380: Insufficient validation in vga(4) may allow an attacker to gain
381: root privileges on some i386 systems.</a>
1.336 brad 382: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 383: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 384: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 385: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 386: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 387: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 388: found by Chris Evans.</a>
1.333 deraadt 389: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 390: Several problems have been found in OpenSSL.</a>
1.333 deraadt 391: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 392: httpd(8) does not sanitize the Expect header from an HTTP request
393: when it is reflected back in an error message, which might allow
394: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 395: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 396: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
397: possible for an attacker to construct an invalid signature which
398: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 399: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 400: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 401: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 402: Due to the failure to correctly validate LCP configuration option
403: lengths, it is possible for an attacker to send LCP packets via an
404: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 405: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 406: A problem in isakmpd(8) caused IPsec to run partly without replay
407: protection.</a>
1.333 deraadt 408: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 409: It is possible to cause the kernel to panic when more than the default
410: number of sempahores have been allocated.</a>
1.333 deraadt 411: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 412: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
413: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
414: option.</a>
1.333 deraadt 415: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 416: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 417: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 418: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
419: overflow.</a>
1.333 deraadt 420: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 421: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 422: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 423: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 424: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 425: A race condition has been reported to exist in the handling by sendmail
426: of asynchronous signals.</a>
427: </ul>
428:
429: <li>
1.318 deraadt 430: <a name="38"></a>
431:
432: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
433: These are the OpenBSD 3.8 advisories -- all these problems are solved
434: in <a href=anoncvs.html>OpenBSD current</a> and the
435: <a href=stable.html>patch branch</a>.
436:
437: <p>
438: <ul>
1.332 brad 439: <li><a href="errata38.html#ssh2">Oct 12, 2006:
440: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 441: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 442: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 443: found by Chris Evans.</a>
444: <li><a href="errata38.html#openssl2">Oct 7, 2006:
445: Several problems have been found in OpenSSL.</a>
446: <li><a href="errata38.html#httpd2">Oct 7, 2006:
447: httpd(8) does not sanitize the Expect header from an HTTP request
448: when it is reflected back in an error message, which might allow
449: cross-site scripting (XSS) style attacks.</a>
1.329 brad 450: <li><a href="errata38.html#openssl">Sep 8, 2006:
451: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
452: possible for an attacker to construct an invalid signature which
453: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 454: <li><a href="errata38.html#bind">Sep 8, 2006:
455: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 456: <li><a href="errata38.html#sppp">Sep 2, 2006:
457: Due to the failure to correctly validate LCP configuration option
458: lengths, it is possible for an attacker to send LCP packets via an
459: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 460: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
461: A problem in isakmpd(8) caused IPsec to run partly without replay
462: protection.</a>
463: <li><a href="errata38.html#sem">Aug 25, 2006:
464: It is possible to cause the kernel to panic when more than the default
465: number of sempahores have been allocated.</a>
466: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
467: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
468: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
469: option.</a>
470: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
471: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 472: <li><a href="errata38.html#httpd">Jul 30, 2006:
473: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
474: overflow.</a>
1.324 brad 475: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
476: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 477: <li><a href="errata38.html#xorg">May 2, 2006:
478: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 479: <li><a href="errata38.html#sendmail">Mar 25, 2006:
480: A race condition has been reported to exist in the handling by sendmail
481: of asynchronous signals.</a>
482: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 483: Josh Bressers has reported a weakness in OpenSSH caused due to the
484: insecure use of the system(3) function in scp(1) when performing copy
485: operations using filenames that are supplied by the user from the
486: command line.</a>
1.321 brad 487: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 488: Do not allow users to trick suid programs into re-opening files via
489: /dev/fd.</a>
1.321 brad 490: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 491: A buffer overflow has been found in the Perl interpreter with the
492: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 493: </ul>
494:
495: <li>
1.312 david 496: <a name="37"></a>
497:
498: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
499: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 500: in <a href="anoncvs.html">OpenBSD current</a>. The
501: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
502: you should update your machine.
1.312 david 503:
504: <p>
505: <ul>
1.322 brad 506: <li><a href="errata37.html#xorg">May 2, 2006:
507: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 508: <li><a href="errata37.html#sendmail">Mar 25, 2006:
509: A race condition has been reported to exist in the handling by sendmail
510: of asynchronous signals.</a>
1.320 brad 511: <li><a href="errata37.html#ssh">Feb 12, 2006:
512: Josh Bressers has reported a weakness in OpenSSH caused due to the
513: insecure use of the system(3) function in scp(1) when performing copy
514: operations using filenames that are supplied by the user from the
515: command line.</a>
1.319 brad 516: <li><a href="errata37.html#fd">Jan 5, 2006:
517: Do not allow users to trick suid programs into re-opening files via
518: /dev/fd.</a>
519: <li><a href="errata37.html#perl">Jan 5, 2006:
520: A buffer overflow has been found in the Perl interpreter with the
521: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 522: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 523: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 524: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 525: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 526: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 527: Fix a race condition in sudo(8) that could allow a user
1.315 millert 528: to run arbitrary commands.</a>
1.318 deraadt 529: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 530: Fix a buffer overflow, memory leaks, and NULL pointer
531: dereference in cvs(1).</a>
1.312 david 532: </ul>
533:
534: <li>
1.301 miod 535: <a name="36"></a>
536:
537: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
538: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 539: in <a href="anoncvs.html">OpenBSD current</a>. The
540: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
541: you should update your machine.
1.301 miod 542:
543: <p>
1.302 markus 544: <ul>
1.317 millert 545: <li><a href="errata36.html#libz2">Jul 21, 2005:
546: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 547: <li><a href="errata36.html#libz">Jul 6, 2005:
548: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 549: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 550: Fix a race condition in sudo(8) that could allow a user
1.315 millert 551: to run arbitrary commands.</a>
1.311 deraadt 552: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 553: Fix a buffer overflow, memory leaks, and NULL pointer
554: dereference in cvs(1).</a>
1.311 deraadt 555: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 556: Due to buffer overflows in telnet(1), a malicious
557: server or man-in-the-middle attack could allow
558: execution of arbitrary code with the privileges of
559: the user invoking telnet(1).</a>
1.311 deraadt 560: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 561: More stringent checking should be done in the copy(9)
562: functions to prevent their misuse.</a>
1.311 deraadt 563: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 564: More stringent checking should be done in the copy(9)
565: functions to prevent their misuse.</a>
1.311 deraadt 566: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 567: httpd(8)'s mod_include module fails to properly validate
568: the length of user supplied tag strings prior to copying
1.305 brad 569: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 570: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 571: On systems running isakmpd(8) it is possible for a local
572: user to cause kernel memory corruption and system panic by
1.303 markus 573: setting ipsec(4) credentials on a socket.</a>
1.302 markus 574: </ul>
1.301 miod 575:
576: <li>
1.288 matthieu 577: <a name="35"></a>
1.279 deraadt 578:
1.294 david 579: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 580: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 581: in <a href="anoncvs.html">OpenBSD current</a>. The
582: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
583: you should update your machine.
1.279 deraadt 584:
585: <p>
586: <ul>
1.310 brad 587: <li><a href="errata35.html#cvs4">Apr 28, 2005:
588: Fix a buffer overflow, memory leaks, and NULL pointer
589: dereference in cvs(1).</a>
1.309 brad 590: <li><a href="errata35.html#telnet">Mar 30, 2005:
591: Due to buffer overflows in telnet(1), a malicious
592: server or man-in-the-middle attack could allow
593: execution of arbitrary code with the privileges of
594: the user invoking telnet(1).</a>
1.308 brad 595: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 596: More stringent checking should be done in the copy(9)
597: functions to prevent their misuse.</a>
1.306 brad 598: <li><a href="errata35.html#locore">Feb 28, 2005:
599: More stringent checking should be done in the copy(9)
600: functions to prevent their misuse.</a>
1.304 brad 601: <li><a href="errata35.html#httpd3">Jan 12, 2005:
602: httpd(8)'s mod_include module fails to properly validate
603: the length of user supplied tag strings prior to copying
1.305 brad 604: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 605: <li><a href="errata35.html#pfkey">Dec 14, 2004:
606: On systems running isakmpd(8) it is possible for a local
607: user to cause kernel memory corruption and system panic by
1.303 markus 608: setting ipsec(4) credentials on a socket.</a>
1.301 miod 609: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 610: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 611: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 612: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 613: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 614: httpd(8)'s mod_rewrite module can be made to write one zero byte in
615: an arbitrary memory position outside of a char array, causing a DoS
616: or possibly buffer overflows.</a>
1.301 miod 617: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 618: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 619: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 620: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 621: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 622: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 623: Multiple remote vulnerabilities have been found in the cvs(1)
624: server which can be used by CVS clients to crash or execute
1.293 brad 625: arbitrary code on the server.</a>
1.301 miod 626: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 627: kdc(8) performs inadequate checking of request fields, leading
628: to the possibility of principal impersonation from other
629: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 630: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 631: xdm(1) ignores the requestPort resource and creates a
1.293 brad 632: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 633: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 634: A buffer overflow in the cvs(1) server has been found,
635: which can be used by CVS clients to execute arbitrary code on
1.293 brad 636: the server.</a>
1.301 miod 637: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 638: Integer overflow problems were found in procfs, allowing
1.293 brad 639: reading of arbitrary kernel memory.</a>
1.301 miod 640: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 641: Pathname validation problems have been found in cvs(1),
642: allowing clients and servers access to files outside the
1.293 brad 643: repository or local CVS tree.</a>
1.279 deraadt 644: </ul>
645:
646: <p>
647: <li>
1.288 matthieu 648: <a name="34"></a>
1.261 david 649:
1.294 david 650: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 651: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 652: in <a href="anoncvs.html">OpenBSD current</a>. The
653: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
654: you should update your machine.
1.261 david 655: <p>
656: <ul>
1.302 markus 657: <li><a href="errata34.html#pfkey">Dec 14, 2004:
658: On systems running isakmpd(8) it is possible for a local
659: user to cause kernel memory corruption and system panic by
1.303 markus 660: setting ipsec(4) credentials on a socket.</a>
1.298 brad 661: <li><a href="errata34.html#xpm">Sep 16, 2004:
662: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 663: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
664: httpd(8)'s mod_rewrite module can be made to write one zero byte in
665: an arbitrary memory position outside of a char array, causing a DoS
666: or possibly buffer overflows.</a>
1.294 david 667: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 668: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 669: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 670: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 671: an attacker can delete IPsec tunnels at will.</a>
1.294 david 672: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 673: Multiple remote vulnerabilities have been found in the cvs(1)
674: server which can be used by CVS clients to crash or execute
1.293 brad 675: arbitrary code on the server.</a>
1.294 david 676: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 677: kdc(8) performs inadequate checking of request fields, leading
678: to the possibility of principal impersonation from other
679: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 680: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 681: A buffer overflow in the cvs(1) server has been found,
682: which can be used by CVS clients to execute arbitrary code on
683: the server.</a>
1.294 david 684: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 685: Integer overflow problems were found in procfs, allowing
686: reading of arbitrary kernel memory.</a>
1.294 david 687: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 688: Pathname validation problems have been found in cvs(1),
689: allowing clients and servers access to files outside the
690: repository or local CVS tree.</a>
1.294 david 691: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 692: A missing check for a NULL-pointer dereference may allow a
1.281 otto 693: remote attacker to crash applications using OpenSSL.</a>
1.294 david 694: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 695: Defects in the payload validation and processing functions of
696: isakmpd have been discovered. An attacker could send malformed
697: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 698: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 699: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
700: access module, using IP addresses without a netmask on big endian
701: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 702: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 703: An IPv6 MTU handling problem exists that could be used by an
704: attacker to cause a denial of service attack.</a>
1.294 david 705: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 706: A reference counting bug in shmat(2) could be used to write to
707: kernel memory under certain circumstances.</a>
1.294 david 708: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 709: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 710: by Thomas Walpuski.</a>
1.294 david 711: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 712: It may be possible for a local user to overrun the stack in
713: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 714: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 715: The use of certain ASN.1 encodings or malformed public keys may
716: allow an attacker to mount a denial of service attack against
717: applications linked with ssl(3).</a>
1.261 david 718: </ul>
719:
720: <li>
1.288 matthieu 721: <a name="33"></a>
1.246 deraadt 722:
1.294 david 723: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 724: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 725: in <a href="anoncvs.html">OpenBSD current</a>. The
726: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 727: you should update your machine.
1.246 deraadt 728: <p>
729: <ul>
1.294 david 730: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 731: Pathname validation problems have been found in cvs(1),
732: allowing clients and servers access to files outside the
733: repository or local CVS tree.</a>
1.294 david 734: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 735: A missing check for a NULL-pointer dereference may allow a
1.281 otto 736: remote attacker to crash applications using OpenSSL.</a>
1.294 david 737: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 738: Defects in the payload validation and processing functions of
739: isakmpd have been discovered. An attacker could send malformed
740: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 741: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 742: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
743: access module, using IP addresses without a netmask on big endian
744: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 745: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 746: An IPv6 MTU handling problem exists that could be used by an
747: attacker to cause a denial of service attack.</a>
1.294 david 748: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 749: A reference counting bug in shmat(2) could be used to write to
750: kernel memory under certain circumstances.</a>
1.294 david 751: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 752: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 753: by Thomas Walpuski.</a>
1.294 david 754: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 755: It may be possible for a local user to execute arbitrary code
756: resulting in escalation of privileges due to a stack overrun
757: in compat_ibcs2(8).</a>
1.294 david 758: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 759: The use of certain ASN.1 encodings or malformed public keys may
760: allow an attacker to mount a denial of service attack against
761: applications linked with ssl(3).</a>
1.294 david 762: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 763: Access of freed memory in pf(4) could be used to
1.260 margarid 764: remotely panic a machine using scrub rules.</a>
1.294 david 765: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 766: A buffer overflow in the address parsing in
767: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 768: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 769: OpenSSH versions prior to 3.7 contains a buffer management error
770: that is potentially exploitable.</a>
1.294 david 771: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 772: Root may be able to reduce the security level by taking advantage of
773: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 774: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 775: An improper bounds check in the kernel may allow a local user
776: to panic the kernel.</a>
1.294 david 777: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 778: An off-by-one error exists in the C library function realpath(3)
779: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 780: </ul>
781:
1.265 miod 782:
1.247 david 783: <p>
1.246 deraadt 784: <li>
1.288 matthieu 785: <a name="32"></a>
1.224 deraadt 786:
1.294 david 787: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 788: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 789: in <a href="anoncvs.html">OpenBSD current</a>. The
790: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 791: you should update your machine.
1.224 deraadt 792: <p>
793: <ul>
1.294 david 794: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 795: The use of certain ASN.1 encodings or malformed public keys may
796: allow an attacker to mount a denial of service attack against
797: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 798: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 799: Access of freed memory in pf(4) could be used to
1.260 margarid 800: remotely panic a machine using scrub rules.</a>
1.294 david 801: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 802: A buffer overflow in the address parsing in
803: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 804: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 805: OpenSSH versions prior to 3.7 contains a buffer management error
806: that is potentially exploitable.</a>
1.294 david 807: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 808: Fix for a potential security issue in
809: sendmail(8) with respect to DNS maps.</a>
1.294 david 810: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 811: An off-by-one error exists in the C library function realpath(3)
812: may allow an attacker to gain escalated privileges.</a>
1.294 david 813: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 814: A buffer overflow in the address parsing in
815: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 816: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 817: A cryptographic weaknesses in the Kerberos v4 protocol can be
818: exploited on Kerberos v5 as well.</a>
1.294 david 819: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 820: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 821: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 822: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 823: Various SSL and TLS operations in OpenSSL are vulnerable to
824: timing attacks.</a>
1.294 david 825: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 826: A buffer overflow in lprm(1) may allow an attacker to elevate
827: privileges to user daemon.</a>.
1.294 david 828: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 829: A buffer overflow in the envelope comments processing in
830: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 831: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 832: httpd(8) leaks file inode numbers via ETag header as well as
833: child PIDs in multipart MIME boundary generation. This could
834: lead, for example, to NFS exploitation because it uses inode
835: numbers as part of the file handle.</a>
1.294 david 836: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 837: In ssl(8) an information leak can occur via timing by performing
838: a MAC computation even if incorrect block cipher padding has
839: been found, this is a countermeasure. Also, check for negative
840: sizes, in allocation routines.</a>
1.294 david 841: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 842: A double free exists in cvs(1) that could lead to privilege
843: escalation for cvs configurations where the cvs command is
1.233 margarid 844: run as a privileged user.</a>
1.294 david 845: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 846: A buffer overflow exists in named(8) that could lead to a
847: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 848: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 849: A logic error in the pool kernel memory allocator could cause
850: memory corruption in low-memory situations, causing the system
851: to crash.</a>
1.294 david 852: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 853: An attacker can bypass smrsh(8)'s restrictions and execute
854: arbitrary commands with the privileges of his own account.</a>
1.294 david 855: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 856: Network bridges running pf with scrubbing enabled could cause
857: mbuf corruption, causing the system to crash.</a>
1.294 david 858: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 859: A buffer overflow can occur in the kadmind(8) daemon, leading
860: to possible remote crash or exploit.</a>
1.224 deraadt 861: </ul>
862:
1.227 miod 863: <p>
864: <li>
1.288 matthieu 865: <a name="31"></a>
1.203 deraadt 866:
1.294 david 867: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 868: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 869: in <a href="anoncvs.html">OpenBSD current</a>. The
870: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 871: you should update your machine.
1.203 deraadt 872:
873: <p>
874: <ul>
1.294 david 875: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 876: A buffer overflow in the address parsing in
877: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 878: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 879: A cryptographic weaknesses in the Kerberos v4 protocol can be
880: exploited on Kerberos v5 as well.</a>
1.294 david 881: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 882: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 883: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 884: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 885: Various SSL and TLS operations in OpenSSL are vulnerable to
886: timing attacks.</a>
1.294 david 887: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 888: A buffer overflow in lprm(1) may allow an attacker to gain
889: root privileges.</a>
1.294 david 890: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 891: A buffer overflow in the envelope comments processing in
892: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 893: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 894: In ssl(8) an information leak can occur via timing by performing
895: a MAC computation even if incorrect block cipher padding has
896: been found, this is a countermeasure. Also, check for negative
897: sizes, in allocation routines.</a>
1.294 david 898: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 899: A double free exists in cvs(1) that could lead to privilege
900: escalation for cvs configurations where the cvs command is
1.294 david 901: run as a privileged user</a>.
902: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 903: A buffer overflow exists in named(8) that could lead to a
904: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 905: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 906: Incorrect argument checking in the getitimer(2) system call
907: may allow an attacker to crash the system.</a>
1.294 david 908: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 909: An attacker can bypass smrsh(8)'s restrictions and execute
910: arbitrary commands with the privileges of his own account.</a>
1.294 david 911: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 912: A buffer overflow can occur in the kadmind(8) daemon, leading
913: to possible remote crash or exploit.</a>
1.294 david 914: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 915: Incorrect argument checking in the setitimer(2) system call
916: may allow an attacker to write to kernel memory.</a>
1.294 david 917: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 918: An insufficient boundary check in the select system call
1.220 miod 919: allows an attacker to overwrite kernel memory and execute arbitrary code
920: in kernel context.</a>
1.294 david 921: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 922: Several remote buffer overflows can occur in the SSL2 server and SSL3
923: client of the ssl(8) library, as in the ASN.1 parser code in the
924: crypto(3) library, all of them being potentially remotely
925: exploitable.</a>
1.294 david 926: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 927: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
928: possible remote crash.</a>
1.294 david 929: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 930: A race condition exists in the pppd(8) daemon which may cause it to
931: alter the file permissions of an arbitrary file.</a>
1.294 david 932: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 933: Receiving IKE payloads out of sequence can cause isakmpd(8) to
934: crash.</a>
1.294 david 935: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 936: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 937: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 938: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 939: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 940: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 941: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 942: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 943: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 944: input validation error that can result in an integer overflow and
945: privilege escalation.</a>
1.294 david 946: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 947: A buffer overflow can occur during the interpretation of chunked
948: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 949: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 950: Under certain conditions, on systems using YP with netgroups
951: in the password database, it is possible that sshd(8) does
952: ACL checks for the requested user name but uses the password
953: database entry of a different user for authentication. This
954: means that denied users might authenticate successfully
955: while permitted users could be locked out.</a>
1.294 david 956: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 957: A race condition exists that could defeat the kernel's
958: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 959: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 960: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 961: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 962: A local user can gain super-user privileges due to a buffer
963: overflow in sshd(8) if AFS has been configured on the system
964: or if KerberosTgtPassing or AFSTokenPassing has been enabled
965: in the sshd_config file.</a>
1.203 deraadt 966: </ul>
967:
1.235 miod 968: <p>
1.203 deraadt 969: <li>
1.288 matthieu 970: <a name="30"></a>
1.187 deraadt 971:
1.294 david 972: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 973: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 974: in <a href="anoncvs.html">OpenBSD current</a>. The
975: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 976: you should update your machine.
1.187 deraadt 977:
978: <p>
979: <ul>
1.294 david 980: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 981: A buffer overflow exists in named(8) that could lead to a
982: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 983: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 984: Incorrect argument checking in the getitimer(2) system call
985: may allow an attacker to crash the system.</a>
1.294 david 986: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 987: An attacker can bypass smrsh(8)'s restrictions and execute
988: arbitrary commands with the privileges of his own account.</a>
1.294 david 989: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 990: A buffer overflow can occur in the kadmind(8) daemon, leading
991: to possible remote crash or exploit.</a>
1.294 david 992: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 993: Incorrect argument checking in the setitimer(2) system call
994: may allow an attacker to write to kernel memory.</a>
1.294 david 995: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 996: An insufficient boundary check in the select and poll system calls
997: allows an attacker to overwrite kernel memory and execute arbitrary code
998: in kernel context.</a>
1.294 david 999: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1000: Several remote buffer overflows can occur in the SSL2 server and SSL3
1001: client of the ssl(8) library, as in the ASN.1 parser code in the
1002: crypto(3) library, all of them being potentially remotely
1003: exploitable.</a>
1.294 david 1004: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1005: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1006: possible remote crash.</a>
1.294 david 1007: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1008: A race condition exists in the pppd(8) daemon which may cause it to
1009: alter the file permissions of an arbitrary file.</a>
1.294 david 1010: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1011: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1012: crash.</a>
1.294 david 1013: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1014: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1015: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1016: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1017: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1018: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1019: input validation error that can result in an integer overflow and
1020: privilege escalation.</a>
1.294 david 1021: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1022: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1023: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1024: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1025: A buffer overflow can occur during the interpretation of chunked
1026: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1027: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1028: A race condition exists that could defeat the kernel's
1029: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1030: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1031: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1032: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1033: A local user can gain super-user privileges due to a buffer
1034: overflow in sshd(8) if AFS has been configured on the system
1035: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1036: in the sshd_config file.</a>
1.294 david 1037: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1038: The mail(1) was interpreting tilde escapes even when invoked
1039: in non-interactive mode. As mail(1) is called as root from cron,
1040: this can lead to a local root compromise.</a>
1.294 david 1041: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1042: Under certain conditions, on systems using YP with netgroups in
1043: the password database, it is possible for the rexecd(8) and rshd(8)
1044: daemons to execute a shell from a password database entry for a
1045: different user. Similarly, atrun(8) may change to the wrong
1046: home directory when running jobs.</a>
1.294 david 1047: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1048: A potential double free() exists in the zlib library;
1049: this is not exploitable on OpenBSD.
1050: The kernel also contains a copy of zlib; it is not
1051: currently known if the kernel zlib is exploitable.</a>
1.294 david 1052: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1053: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1054: may allow a local user to gain super-user privileges.</a>
1.294 david 1055: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1056: A race condition between the ptrace(2) and execve(2) system calls
1057: allows an attacker to modify the memory contents of suid/sgid
1058: processes which could lead to compromise of the super-user account.</a>
1.294 david 1059: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1060: There is a security hole in sudo(8) that can be exploited
1061: when the Postfix sendmail replacement is installed that may
1062: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1063: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1064: An attacker can trick a machine running the lpd daemon into
1065: creating new files in the root directory from a machine with
1066: remote line printer access.</a>
1.294 david 1067: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1068: The vi.recover script can be abused in such a way as
1069: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1070: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1071: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1072: resulting in a crash.</a>
1.294 david 1073: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1074: A security hole that may allow an attacker to partially authenticate
1075: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1076: </ul>
1077:
1078: <p>
1079: <li>
1.288 matthieu 1080: <a name="29"></a>
1.173 deraadt 1081:
1.294 david 1082: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1083: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1084: in <a href="anoncvs.html">OpenBSD current</a>. The
1085: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1086: you should update your machine.
1087:
1.173 deraadt 1088:
1089: <p>
1090: <ul>
1.294 david 1091: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1092: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1093: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1094: A race condition exists that could defeat the kernel's
1095: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1096: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1097: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1098: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1099: A local user can gain super-user privileges due to a buffer
1100: overflow in sshd(8) if AFS has been configured on the system
1101: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1102: in the sshd_config file.</a>
1.294 david 1103: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1104: The mail(1) was interpreting tilde escapes even when invoked
1105: in non-interactive mode. As mail(1) is called as root from cron,
1106: this can lead to a local root compromise.</a>
1.294 david 1107: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1108: A potential double free() exists in the zlib library;
1109: this is not exploitable on OpenBSD.
1110: The kernel also contains a copy of zlib; it is not
1111: currently known if the kernel zlib is exploitable.</a>
1.294 david 1112: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1113: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1114: may allow a local user to gain super-user privileges.</a>
1.294 david 1115: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1116: A race condition between the ptrace(2) and execve(2) system calls
1117: allows an attacker to modify the memory contents of suid/sgid
1118: processes which could lead to compromise of the super-user account.</a>
1.294 david 1119: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1120: There is a security hole in sudo(8) that can be exploited
1121: when the Postfix sendmail replacement is installed that may
1122: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1123: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1124: An attacker can trick a machine running the lpd daemon into
1125: creating new files in the root directory from a machine with
1126: remote line printer access.</a>
1.294 david 1127: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1128: The vi.recover script can be abused in such a way as
1129: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1130: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1131: A security hole exists in uuxqt(8) that may allow an
1132: attacker to gain root privileges.</a>
1.294 david 1133: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1134: A security hole exists in lpd(8) that may allow an
1135: attacker to gain root privileges if lpd is running.</a>
1.294 david 1136: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1137: A security hole exists in sendmail(8) that may allow an
1138: attacker on the local host to gain root privileges.</a>
1.294 david 1139: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1140: A kernel buffer overflow in the NFS code can be used to execute
1141: arbitrary code by users with mount privileges (only root by
1.181 millert 1142: default).</a>
1.294 david 1143: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1144: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1145: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1146: sshd(8) allows users to delete arbitrary files named "cookies"
1147: if X11 forwarding is enabled. X11 forwarding is disabled
1148: by default.</a>
1.294 david 1149: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1150: Programs using the fts routines can be tricked into changing
1151: into the wrong directory.</a>
1.294 david 1152: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1153: Sendmail signal handlers contain unsafe code,
1154: leading to numerous race conditions.</a>
1.173 deraadt 1155: </ul>
1156:
1157: <p>
1158: <li>
1.288 matthieu 1159: <a name="28"></a>
1.152 deraadt 1160:
1.294 david 1161: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1162: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1163: in <a href="anoncvs.html">OpenBSD current</a>. The
1164: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1165: you should update your machine.
1166:
1.152 deraadt 1167:
1168: <p>
1169: <ul>
1.294 david 1170: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1171: A security hole exists in uuxqt(8) that may allow an
1172: attacker to gain root privileges.</a>
1.294 david 1173: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1174: A security hole exists in lpd(8) that may allow an
1175: attacker to gain root privileges if lpd is running.</a>
1.294 david 1176: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1177: A security hole exists in sendmail(8) that may allow an
1178: attacker on the local host to gain root privileges.</a>
1.294 david 1179: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1180: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1181: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1182: Programs using the fts routines can be tricked into changing
1183: into the wrong directory.</a>
1.294 david 1184: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1185: Sendmail signal handlers contain unsafe code,
1186: leading to numerous race conditions.</a>
1.294 david 1187: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1188: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1189: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1190: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1191: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1192: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1193: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1194: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1195: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1196: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1197: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1198: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1199: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1200: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1201: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1202: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1203: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1204: rnd(4) did not use all of its input when written to.</a>
1.294 david 1205: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1206: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1207: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1208: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1209: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1210: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1211: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1212: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1213: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1214: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1215: </ul>
1216:
1217: <p>
1218: <li>
1.288 matthieu 1219: <a name="27"></a>
1.124 deraadt 1220:
1.294 david 1221: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1222: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1223: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1224: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1225:
1226: <p>
1227: <ul>
1.294 david 1228: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1229: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1230: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1231: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1232: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1233: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1234: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1235: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1236: (patch included)</a>
1.294 david 1237: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1238: X11 libraries have 2 potential overflows in xtrans code.
1239: (patch included)</a>
1.294 david 1240: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1241: Apache mod_rewrite and mod_vhost_alias modules could expose files
1242: on the server in certain configurations if used.
1243: (patch included)</a>
1.294 david 1244: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1245: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1246: TERMPATH and TERMCAP environment variables as it should.
1247: (patch included)</a>
1.294 david 1248: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1249: There are printf-style format string bugs in several privileged
1250: programs. (patch included)</a>
1.294 david 1251: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1252: libcurses honored terminal descriptions in the $HOME/.terminfo
1253: directory as well as in the TERMCAP environment variable for
1254: setuid and setgid applications.
1.146 deraadt 1255: (patch included)</a>
1.294 david 1256: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1257: A format string vulnerability exists in talkd(8).
1258: (patch included)</a>
1.294 david 1259: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1260: A format string vulnerability exists in the pw_error() function of the
1261: libutil library, yielding localhost root through chpass(1).
1262: (patch included)</a>
1.294 david 1263: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1264: Bad ESP/AH packets could cause a crash under certain conditions.
1265: (patch included)</a>
1.294 david 1266: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1267: A format string vulnerability (localhost root) exists in xlock(1).
1268: (patch included)</a>
1.294 david 1269: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1270: Various bugs found in X11 libraries have various side effects, almost
1271: completely denial of service in OpenBSD.
1272: (patch included)</a>
1.294 david 1273: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1274: Just like pretty much all the other unix ftp daemons
1275: on the planet, ftpd had a remote root hole in it.
1276: Luckily, ftpd was not enabled by default.
1.137 deraadt 1277: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1278: (patch included)</a>
1.294 david 1279: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1280: Mopd, very rarely used, contained some buffer overflows.
1281: (patch included)</a>
1.294 david 1282: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1283: libedit would check for a <b>.editrc</b> file in the current
1284: directory. Not known to be a real security issue, but a patch
1285: is available anyways.
1286: (patch included)</a>
1.294 david 1287: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1288: A serious bug in dhclient(8) could allow strings from a
1289: malicious dhcp server to be executed in the shell as root.
1290: (patch included)</a>
1.294 david 1291: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1292: A serious bug in isakmpd(8) policy handling wherein
1293: policy verification could be completely bypassed in isakmpd.
1294: (patch included)</a>
1.294 david 1295: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1296: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1297: should not be used, and results in security problems on
1298: other operating systems.</a>
1.294 david 1299: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1300: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1301: (patch included)</a>
1.294 david 1302: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1303: Improper use of ipf <i>keep-state</i> rules can result
1304: in firewall rules being bypassed. (patch included)</a>
1305:
1.124 deraadt 1306: </ul>
1307:
1308: <p>
1309: <li>
1.288 matthieu 1310: <a name="26"></a>
1.119 deraadt 1311:
1.294 david 1312: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1313: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1314: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1315: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1316:
1317: <p>
1318: <ul>
1.294 david 1319: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1320: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1321: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1322: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1323: Improper use of ipf <i>keep-state</i> rules can result
1324: in firewall rules being bypassed. (patch included)</a>
1.294 david 1325: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1326: xlockmore has a bug which a localhost attacker can use to gain
1327: access to the encrypted root password hash (which is normally
1.245 miod 1328: encoded using blowfish</a> (see
1.294 david 1329: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1330: crypt(3)</a>)
1.245 miod 1331: (patch included).
1.294 david 1332: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1333: Systems running with procfs enabled and mounted are
1334: vulnerable to a very tricky exploit. procfs is not
1335: mounted by default.
1336: (patch included).</a>
1.294 david 1337: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1338: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1339: thus exposing the system to a race where the aliases file
1340: did not exist.
1.119 deraadt 1341: (patch included).</a>
1.294 david 1342: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1343: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1344: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1345: A buffer overflow in the RSAREF code included in the
1346: USA version of libssl, is possibly exploitable in
1347: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1348: (patch included).<br></a>
1349: <strong>Update:</strong> Turns out that this was not exploitable
1350: in any of the software included in OpenBSD 2.6.
1.294 david 1351: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1352: Any user could change interface media configurations, resulting in
1353: a localhost denial of service attack.
1.121 deraadt 1354: (patch included).</a>
1.119 deraadt 1355: </ul>
1356:
1357: <p>
1358: <li>
1.288 matthieu 1359: <a name="25"></a>
1.106 deraadt 1360:
1.294 david 1361: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1362: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1363: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1364: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1365:
1.96 deraadt 1366: <p>
1.104 deraadt 1367: <ul>
1.294 david 1368: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1369: In cron(8), make sure argv[] is NULL terminated in the
1370: fake popen() and run sendmail as the user, not as root.
1371: (patch included).</a>
1.294 david 1372: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1373: filesystems had an overrun in their handling of uio_offset
1374: in their readdir() routines. (These filesystems are not
1375: enabled by default). (patch included).</a>
1.294 david 1376: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1377: when we execve() a new process. (patch included).</a>
1.294 david 1378: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1379: been handled by IPsec may be transmitted as cleartext.
1380: PF_KEY SA expirations may leak kernel resources.
1381: (patch included).</a>
1.294 david 1382: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1383: motd re-writing and change the find(1) to use -execdir
1384: (patch included).</a>
1.294 david 1385: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1386: users to chflags(2) or fchflags(2) on character or block devices
1387: which they may currently be the owner of (patch included).</a>
1.294 david 1388: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1389: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1390: </ul>
1391:
1.106 deraadt 1392: <p>
1393: <li>
1.288 matthieu 1394: <a name="24"></a>
1.235 miod 1395:
1.294 david 1396: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1397: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1398: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1399: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1400:
1.96 deraadt 1401: <p>
1.75 deraadt 1402: <ul>
1.294 david 1403: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1404: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1405: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1406: another kernel crash case caused by the <strong>crashme</strong>
1407: program (patch included).</a>
1.294 david 1408: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1409: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1410: (patch included).</a>
1.294 david 1411: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1412: existed in ping(8). (patch included).</a>
1.294 david 1413: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1414: the ipq, which could permit an attacker to cause a crash.
1415: (patch included).</a>
1.294 david 1416: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1417: kernel between accept(2) and select(2) could permit an attacker
1418: to hang sockets from remote.
1419: (patch included).</a>
1.294 david 1420: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1421: bog the machine excessively and cause problems.
1422: (patch included).</a>
1.294 david 1423: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1424: DDB interacted to possibly cause a crash.
1425: (patch included).</a>
1.294 david 1426: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1427: (patch included).</a>
1.294 david 1428: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1429: problem in bootpd(8). (patch included).</a>
1.294 david 1430: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1431: exploitable problem relating to environment variables in termcap
1432: and curses. (patch included).</a>
1.294 david 1433: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1434: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1435: </ul>
1436:
1.106 deraadt 1437: <p>
1438: <li>
1.288 matthieu 1439: <a name="23"></a>
1.235 miod 1440:
1.294 david 1441: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1442: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1443: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1444: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1445:
1.96 deraadt 1446: <p>
1.53 matthieu 1447: <ul>
1.294 david 1448: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1449: problem in bootpd(8). (patch included).</a>
1.294 david 1450: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1451: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1452: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1453: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1454: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1455: chpass(1) has a file descriptor leak which allows an
1456: attacker to modify /etc/master.passwd.</a>
1.294 david 1457: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1458: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1459: should not be executed with fd slots 0, 1, or 2 free.
1460: (patch included).</a>
1.294 david 1461: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1462: libraries (patches included).</a>
1.294 david 1463: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1464: processes too permissive (4th revision patch included).</a>
1.294 david 1465: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1466: of immutable and append-only file flags. (patch included).</a>
1.294 david 1467: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1468: if IPSEC is enabled (patch included).</a>
1.294 david 1469: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1470: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1471: </ul>
1.9 deraadt 1472:
1.106 deraadt 1473: <p>
1474: <li>
1.288 matthieu 1475: <a name="22"></a>
1.235 miod 1476:
1.294 david 1477: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1478: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1479: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1480: still exist in other operating systems. (The supplied patches are for
1481: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1482:
1.96 deraadt 1483: <p>
1.9 deraadt 1484: <ul>
1.294 david 1485: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1486: packets if IPSEC is enabled (patch included).</a>
1.294 david 1487: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1488: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1489: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1490: (patch included).</a>
1.294 david 1491: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1492: (patch included).</a>
1.294 david 1493: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1494: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1495: (patch included).</a>
1.294 david 1496: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1497: export (patch included).</a>
1.112 philen 1498: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1499: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1500: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1501: Acceptance.</a>
1.294 david 1502: A patch is available <a href="errata22.html#sourceroute">here</a>.
1503: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1504: flaw (patch included).</a>
1.294 david 1505: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1506: </ul>
1507:
1.106 deraadt 1508: <p>
1509: <li>
1.288 matthieu 1510: <a name="21"></a>
1.235 miod 1511:
1.294 david 1512: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1513: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1514: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1515: exist in other operating systems. (If you are running OpenBSD 2.1, we
1516: would strongly recommend an upgrade to the newest release, as this
1517: patch list only attempts at fixing the most important security
1518: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1519: security problems. Many of those problems were solved in ways which
1520: make it hard for us to provide patches).
1521:
1.96 deraadt 1522: <p>
1.52 deraadt 1523: <ul>
1.112 philen 1524: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1525: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1526: (patch included)</a>
1.112 philen 1527: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1528: </ul>
1.51 deraadt 1529:
1.106 deraadt 1530: <p>
1531: <li>
1.288 matthieu 1532: <a name="20"></a>
1.235 miod 1533:
1.294 david 1534: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1535: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1536: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1537: exist in other operating systems. (If you are running OpenBSD 2.0, we
1538: commend you for being there back in the old days!, but you're really
1539: missing out if you don't install a new version!)
1540:
1541: <p>
1542: <ul>
1.112 philen 1543: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1544: resolver (patch included)</a>
1545: <li>Many others... if people can hunt them down, please let me know
1546: and we'll put them up here.
1547: </ul>
1.51 deraadt 1548: <p>
1.106 deraadt 1549:
1.288 matthieu 1550: <a name="watching"></a>
1.294 david 1551: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1552:
1.21 deraadt 1553: Since we take a proactive stance with security, we are continually
1554: finding and fixing new security problems. Not all of these problems
1.80 espie 1555: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1556: confirmed to be exploitable; many simple bugs we fix do turn out to
1557: have security consequences we could not predict. We do not have the
1558: time resources to make these changes available in the above format.<p>
1.21 deraadt 1559:
1560: Thus there are usually minor security fixes in the current source code
1561: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1562: guarantee that these problems are of minimal impact and unproven
1.44 ian 1563: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1564: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1565:
1.45 deraadt 1566: People who are really concerned with security can do a number of
1567: things:<p>
1.21 deraadt 1568:
1569: <ul>
1570: <li>If you understand security issues, watch our
1.294 david 1571: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1572: eye out for things which appear security related. Since
1.21 deraadt 1573: exploitability is not proven for many of the fixes we make,
1574: do not expect the relevant commit message to say "SECURITY FIX!".
1575: If a problem is proven and serious, a patch will be available
1576: here very shortly after.
1.161 horacio 1577: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1578: security-announce mailing list</a> which will notify you for every
1.186 ian 1579: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1580: and instruct you on how to patch the problem.
1.21 deraadt 1581: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1582: complete system build from time to time (read /usr/src/Makefile
1583: carefully). Users can make the assumption that the current
1584: source tree always has stronger security than the previous release.
1.45 deraadt 1585: However, building your own system from source code is not trivial;
1.265 miod 1586: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1587: transition between major releases.
1.115 ericj 1588: <li>Install a binary snapshot for your
1.80 espie 1589: architecture, which are made available fairly often. For
1.29 deraadt 1590: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1591: </ul>
1592:
1.9 deraadt 1593: <p>
1.288 matthieu 1594: <a name="reporting"></a>
1.294 david 1595: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1596:
1.5 deraadt 1597: <p> If you find a new security problem, you can mail it to
1.294 david 1598: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1599: <br>
1.5 deraadt 1600: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1601: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1602:
1.107 deraadt 1603: <p>
1.288 matthieu 1604: <a name="papers"></a>
1.294 david 1605: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1606:
1607: A number of papers have been written by OpenBSD team members, about security
1608: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1609: documents are available as follows.<p>
1.107 deraadt 1610:
1611: <ul>
1.113 deraadt 1612: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1613: <a href="events.html#usenix99">Usenix 1999</a>,
1614: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1615: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1616: <a href="papers/bcrypt-paper.ps">paper</a> and
1617: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1618: <p>
1619: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1620: <a href="events.html#usenix99">Usenix 1999</a>,
1621: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1622: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1623: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1624: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1625: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1626: <a href="papers/crypt-paper.ps">paper</a> and
1627: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1628: <p>
1629: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1630: <a href="events.html#usenix99">Usenix 1999</a>,
1631: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1632: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1633: <a href="papers/strlcpy-paper.ps">paper</a> and
1634: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1635: <p>
1.118 deraadt 1636: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1637: <a href="events.html#lisa99">LISA 1999</a>,
1638: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1639: <a href="papers/authgw-paper.ps">paper</a> and
1640: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1641: <p>
1.153 jufi 1642: <li>Encrypting Virtual Memory<br>
1.294 david 1643: <a href="events.html#sec2000">Usenix Security 2000</a>,
1644: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1645: <a href="papers/swapencrypt.ps">paper</a> and
1646: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1647: <p>
1.107 deraadt 1648: </ul>
1.294 david 1649: </ul>
1.106 deraadt 1650:
1.2 deraadt 1651: <hr>
1.294 david 1652: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1653: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1654: <br>
1.362 ! brad 1655: <small>$OpenBSD: security.html,v 1.361 2008/07/15 17:29:25 brad Exp $</small>
1.1 deraadt 1656:
1.24 deraadt 1657: </body>
1658: </html>
![[BACK]](/icons/back.gif){kind=icon}
Return to security.html CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / www