Annotation of www/security.html, Revision 1.366
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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.365 deraadt 57: <br>
1.280 david 58: <a href="#34">3.4</a>,
1.301 miod 59: <a href="#35">3.5</a>,
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 deraadt 67: <a href="#43">4.3</a>,
68: <a href="#44">4.4</a>.
1.114 philen 69: </td>
70: </tr>
71: </table>
1.56 deraadt 72: <hr>
73:
1.294 david 74: <a name="goals"></a>
1.278 deraadt 75: <ul>
1.294 david 76: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 77:
1.14 deraadt 78: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 79: ONE in the industry for security (if we are not already there). Our
80: open software development model permits us to take a more
81: uncompromising view towards increased security than Sun, SGI, IBM, HP,
82: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 83: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 84: cryptography</a>, we are able to take cryptographic approaches towards
85: fixing security problems.<p>
1.18 deraadt 86:
1.288 matthieu 87: <a name="disclosure"></a>
1.294 david 88: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 89:
1.45 deraadt 90: Like many readers of the
1.196 jufi 91: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 92: BUGTRAQ mailing list</a>,
1.106 deraadt 93: we believe in full disclosure of security problems. In the
94: operating system arena, we were probably the first to embrace
95: the concept. Many vendors, even of free software, still try
96: to hide issues from their users.<p>
97:
98: Security information moves very fast in cracker circles. On the other
99: hand, our experience is that coding and releasing of proper security
100: fixes typically requires about an hour of work -- very fast fix
101: turnaround is possible. Thus we think that full disclosure helps the
102: people who really care about security.<p>
103:
1.288 matthieu 104: <a name="process"></a>
1.294 david 105: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 106:
1.12 deraadt 107: Our security auditing team typically has between six and twelve
1.45 deraadt 108: members who continue to search for and fix new security holes. We
109: have been auditing since the summer of 1996. The process we follow to
110: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 111: every critical software component. We are not so much looking for
112: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 113: years later someone discovers the problem used to be a security
1.106 deraadt 114: issue, and we fixed it because it was just a bug, well, all the
115: better. Flaws have been found in just about every area of the system.
116: Entire new classes of security problems have been found during our
117: audit, and often source code which had been audited earlier needs
118: re-auditing with these new flaws in mind. Code often gets audited
119: multiple times, and by multiple people with different auditing
120: skills.<p>
1.12 deraadt 121:
1.94 deraadt 122: Some members of our security auditing team worked for Secure Networks,
123: the company that made the industry's premier network security scanning
124: software package Ballista (Secure Networks got purchased by Network
125: Associates, Ballista got renamed to Cybercop Scanner, and well...)
126: That company did a lot of security research, and thus fit in well
1.106 deraadt 127: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
128: colours since day 1.<p>
1.31 deraadt 129:
1.34 deraadt 130: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 131: In most cases we have found that the determination of exploitability
132: is not an issue. During our ongoing auditing process we find many
133: bugs, and endeavor to fix them even though exploitability is not
134: proven. We fix the bug, and we move on to find other bugs to fix. We
135: have fixed many simple and obvious careless programming errors in code
136: and only months later discovered that the problems were in fact
137: exploitable. (Or, more likely someone on
1.197 jufi 138: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 139: would report that other operating systems were vulnerable to a `newly
140: discovered problem', and then it would be discovered that OpenBSD had
141: been fixed in a previous release). In other cases we have been saved
142: from full exploitability of complex step-by-step attacks because we
143: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 144: managed such a success is the lpd advisory that Secure Networks put out.
145: <p>
1.29 deraadt 146:
1.288 matthieu 147: <a name="newtech"></a>
1.294 david 148: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 149:
150: As we audit source code, we often invent new ways of solving problems.
151: Sometimes these ideas have been used before in some random application
152: written somewhere, but perhaps not taken to the degree that we do.
153: <p>
154:
155: <ul>
156: <li>strlcpy() and strlcat()
157: <li>Memory protection purify
158: <ul>
159: <li>W^X
160: <li>.rodata segment
161: <li>Guard pages
162: <li>Randomized malloc()
163: <li>Randomized mmap()
164: <li>atexit() and stdio protection
165: </ul>
1.295 otto 166: <li>Privilege separation
1.278 deraadt 167: <li>Privilege revocation
168: <li>Chroot jailing
169: <li>New uids
170: <li>ProPolice
171: <li>... and others
172: </ul>
173: <p>
174:
1.294 david 175: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 176:
1.45 deraadt 177: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 178: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 179: commonplace in security forums like
1.197 jufi 180: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 181:
1.45 deraadt 182: The most intense part of our security auditing happened immediately
1.80 espie 183: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 184: over the last third of 1996 and first half of 1997. Thousands (yes,
185: thousands) of security issues were fixed rapidly over this year-long
186: period; bugs like the standard buffer overflows, protocol
187: implementation weaknesses, information gathering, and filesystem
188: races. Hence most of the security problems that we encountered were
189: fixed before our 2.1 release, and then a far smaller number needed
190: fixing for our 2.2 release. We do not find as many problems anymore,
191: it is simply a case of diminishing returns. Recently the security
192: problems we find and fix tend to be significantly more obscure or
193: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 194:
1.35 deraadt 195: <ul>
1.45 deraadt 196: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 197: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 198: to search for more complicated exploits, so we will too.
199: <li>Finding and fixing subtle flaws in complicated software is
200: a lot of fun.
1.35 deraadt 201: </ul>
1.106 deraadt 202: <p>
1.15 deraadt 203:
1.14 deraadt 204: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 205: to find and fix new security flaws.<p>
1.12 deraadt 206:
1.288 matthieu 207: <a name="default"></a>
1.294 david 208: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 209:
210: To ensure that novice users of OpenBSD do not need to become security
211: experts overnight (a viewpoint which other vendors seem to have), we
212: ship the operating system in a Secure by Default mode. All non-essential
213: services are disabled. As the user/administrator becomes more familiar
214: with the system, he will discover that he has to enable daemons and other
215: parts of the system. During the process of learning how to enable a new
216: service, the novice is more likely to learn of security considerations.<p>
217:
218: This is in stark contrast to the increasing number of systems that
219: ship with NFS, mountd, web servers, and various other services enabled
220: by default, creating instantaneous security problems for their users
221: within minutes after their first install.<p>
222:
1.288 matthieu 223: <a name="crypto"></a>
1.294 david 224: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 225:
226: And of course, since the OpenBSD project is based in Canada, it is possible
227: for us to integrate cryptography. For more information, read the page
1.116 deraadt 228: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 229:
1.294 david 230: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 231:
232: <li>
1.365 deraadt 233: <a name="44"></a>
234:
235: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
236: These are the OpenBSD 4.4 advisories -- all these problems are solved
237: in <a href=anoncvs.html>OpenBSD current</a> and the
238: <a href=stable.html>patch branch</a>.
239:
240: <p>
241: <ul>
242: <li>None yet.
243: </ul>
244:
245: <li>
1.357 brad 246: <a name="43"></a>
247:
248: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
249: These are the OpenBSD 4.3 advisories -- all these problems are solved
250: in <a href=anoncvs.html>OpenBSD current</a> and the
251: <a href=stable.html>patch branch</a>.
252:
253: <p>
254: <ul>
1.363 brad 255: <li><a href="errata43.html#005_ndp">October 2, 2008:
256: The Neighbor Discovery Protocol (ndp) did not correctly verify
257: neighbor solicitation requests maybe allowing a nearby attacker
258: to intercept traffic.</a>
1.362 brad 259: <li><a href="errata43.html#004_bind">July 23, 2008:
260: A vulnerability has been found with BIND.</a>
1.361 brad 261: <li><a href="errata43.html#003_xorg">July 15, 2008:
262: Multiple vulnerabilities in X.Org.</a>
1.359 brad 263: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 264: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 265: <li><a href="errata43.html#001_openssh">March 30, 2008:
266: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 267: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 268: </ul>
269:
1.366 ! miod 270: <p>
! 271: OpenBSD 4.2 and earlier releases are not supported anymore. The following
! 272: paragraphs only list advisories issued while they were maintained; these
! 273: releases are likely to be affected by the advisories for more recent releases.
! 274: <br>
1.357 brad 275:
276: <li>
1.348 merdely 277: <a name="42"></a>
278:
279: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
280: These are the OpenBSD 4.2 advisories -- all these problems are solved
281: in <a href=anoncvs.html>OpenBSD current</a> and the
282: <a href=stable.html>patch branch</a>.
283:
284: <p>
285: <ul>
1.364 tobias 286: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 287: The Neighbor Discovery Protocol (ndp) did not correctly verify
288: neighbor solicitation requests maybe allowing a nearby attacker
289: to intercept traffic.</a>
1.362 brad 290: <li><a href="errata42.html#013_bind">July 23, 2008:
291: A vulnerability has been found with BIND.</a>
1.361 brad 292: <li><a href="errata42.html#012_xorg2">July 15, 2008:
293: Multiple vulnerabilities in X.Org.</a>
1.359 brad 294: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 295: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 296: <li><a href="errata42.html#010_openssh">March 30, 2008:
297: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 298: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 299: <li><a href="errata42.html#009_ppp">March 7, 2008:
300: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 301: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
302: Multiple vulnerabilities in X.Org.</a>
1.352 henning 303: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
304: A missing NULL pointer check can lead to a kernel panic.</a>
305: <li><a href="errata42.html#004_pf">Nov 27, 2007:
306: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 307: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
308: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 309: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 310: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 311: </ul>
312:
313: <li>
1.346 matthieu 314: <a name="41"></a>
315:
316: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
317: These are the OpenBSD 4.1 advisories -- all these problems are solved
318: in <a href=anoncvs.html>OpenBSD current</a> and the
319: <a href=stable.html>patch branch</a>.
320:
321: <p>
322: <ul>
1.359 brad 323: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 324: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 325: <li><a href="errata41.html#015_openssh">March 30, 2008:
326: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 327: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 328: <li><a href="errata41.html#014_ppp">March 7, 2008:
329: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 330: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
331: Multiple vulnerabilities in X.Org.</a>
332: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
333: The SSL_get_shared_ciphers() function in OpenSSL contains
334: an off-by-one overflow.</a>
1.350 deraadt 335: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 336: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 337: <li><a href="errata41.html#009_file">Jul 9, 2007:
338: Fix possible heap overflow in file(1).</a>
1.346 matthieu 339: <li><a href="errata41.html#005_route6">Apr 27, 2007:
340: IPv6 type 0 route headers can be used to mount a DoS attack
341: against hosts and networks.</a>
342: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
343: Multiple vulnerabilities in X.Org.</a>
344: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
345: Incorrect mbuf handling for ICMP6 packets.</a>
346: </ul>
347:
348: <li>
1.334 brad 349: <a name="40"></a>
350: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
351: These are the OpenBSD 4.0 advisories -- all these problems are solved
352: in <a href=anoncvs.html>OpenBSD current</a> and the
353: <a href=stable.html>patch branch</a>.
354:
355: <p>
356: <ul>
1.350 deraadt 357: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 358: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 359: <li><a href="errata40.html#015_file">Jul 9, 2007:
360: Fix possible heap overflow in file(1).</a>
1.343 deraadt 361: <li><a href="errata40.html#012_route6">Apr 23, 2007:
362: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 363: against hosts and networks.</a>
1.342 mbalmer 364: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
365: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 366: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
367: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 368: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 369: Insufficient validation in vga(4) may allow an attacker to gain
370: root privileges on some i386 systems.</a>
1.339 deraadt 371: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 372: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 373: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 374: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
375: found by Chris Evans.</a>
1.339 deraadt 376: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 377: Several problems have been found in OpenSSL.</a>
1.339 deraadt 378: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 379: httpd(8) does not sanitize the Expect header from an HTTP request
380: when it is reflected back in an error message, which might allow
381: cross-site scripting (XSS) style attacks.</a>
382: </ul>
383:
384: <li>
1.321 brad 385: <a name="39"></a>
386:
387: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
388: These are the OpenBSD 3.9 advisories -- all these problems are solved
389: in <a href=anoncvs.html>OpenBSD current</a> and the
390: <a href=stable.html>patch branch</a>.
391:
392: <p>
393: <ul>
1.343 deraadt 394: <li><a href="errata39.html#022_route6">Apr 23, 2007:
395: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 396: against hosts and networks.</a>
1.342 mbalmer 397: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
398: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 399: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
400: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 401: <li><a href="errata39.html#agp">Jan 3, 2007:
402: Insufficient validation in vga(4) may allow an attacker to gain
403: root privileges on some i386 systems.</a>
1.336 brad 404: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 405: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 406: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 407: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 408: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 409: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 410: found by Chris Evans.</a>
1.333 deraadt 411: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 412: Several problems have been found in OpenSSL.</a>
1.333 deraadt 413: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 414: httpd(8) does not sanitize the Expect header from an HTTP request
415: when it is reflected back in an error message, which might allow
416: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 417: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 418: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
419: possible for an attacker to construct an invalid signature which
420: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 421: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 422: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 423: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 424: Due to the failure to correctly validate LCP configuration option
425: lengths, it is possible for an attacker to send LCP packets via an
426: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 427: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 428: A problem in isakmpd(8) caused IPsec to run partly without replay
429: protection.</a>
1.333 deraadt 430: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 431: It is possible to cause the kernel to panic when more than the default
432: number of sempahores have been allocated.</a>
1.333 deraadt 433: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 434: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
435: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
436: option.</a>
1.333 deraadt 437: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 438: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 439: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 440: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
441: overflow.</a>
1.333 deraadt 442: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 443: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 444: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 445: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 446: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 447: A race condition has been reported to exist in the handling by sendmail
448: of asynchronous signals.</a>
449: </ul>
450:
451: <li>
1.318 deraadt 452: <a name="38"></a>
453:
454: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
455: These are the OpenBSD 3.8 advisories -- all these problems are solved
456: in <a href=anoncvs.html>OpenBSD current</a> and the
457: <a href=stable.html>patch branch</a>.
458:
459: <p>
460: <ul>
1.332 brad 461: <li><a href="errata38.html#ssh2">Oct 12, 2006:
462: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 463: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 464: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 465: found by Chris Evans.</a>
466: <li><a href="errata38.html#openssl2">Oct 7, 2006:
467: Several problems have been found in OpenSSL.</a>
468: <li><a href="errata38.html#httpd2">Oct 7, 2006:
469: httpd(8) does not sanitize the Expect header from an HTTP request
470: when it is reflected back in an error message, which might allow
471: cross-site scripting (XSS) style attacks.</a>
1.329 brad 472: <li><a href="errata38.html#openssl">Sep 8, 2006:
473: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
474: possible for an attacker to construct an invalid signature which
475: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 476: <li><a href="errata38.html#bind">Sep 8, 2006:
477: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 478: <li><a href="errata38.html#sppp">Sep 2, 2006:
479: Due to the failure to correctly validate LCP configuration option
480: lengths, it is possible for an attacker to send LCP packets via an
481: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 482: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
483: A problem in isakmpd(8) caused IPsec to run partly without replay
484: protection.</a>
485: <li><a href="errata38.html#sem">Aug 25, 2006:
486: It is possible to cause the kernel to panic when more than the default
487: number of sempahores have been allocated.</a>
488: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
489: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
490: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
491: option.</a>
492: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
493: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 494: <li><a href="errata38.html#httpd">Jul 30, 2006:
495: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
496: overflow.</a>
1.324 brad 497: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
498: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 499: <li><a href="errata38.html#xorg">May 2, 2006:
500: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 501: <li><a href="errata38.html#sendmail">Mar 25, 2006:
502: A race condition has been reported to exist in the handling by sendmail
503: of asynchronous signals.</a>
504: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 505: Josh Bressers has reported a weakness in OpenSSH caused due to the
506: insecure use of the system(3) function in scp(1) when performing copy
507: operations using filenames that are supplied by the user from the
508: command line.</a>
1.321 brad 509: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 510: Do not allow users to trick suid programs into re-opening files via
511: /dev/fd.</a>
1.321 brad 512: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 513: A buffer overflow has been found in the Perl interpreter with the
514: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 515: </ul>
516:
517: <li>
1.312 david 518: <a name="37"></a>
519:
520: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
521: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 522: in <a href="anoncvs.html">OpenBSD current</a>. The
523: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
524: you should update your machine.
1.312 david 525:
526: <p>
527: <ul>
1.322 brad 528: <li><a href="errata37.html#xorg">May 2, 2006:
529: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 530: <li><a href="errata37.html#sendmail">Mar 25, 2006:
531: A race condition has been reported to exist in the handling by sendmail
532: of asynchronous signals.</a>
1.320 brad 533: <li><a href="errata37.html#ssh">Feb 12, 2006:
534: Josh Bressers has reported a weakness in OpenSSH caused due to the
535: insecure use of the system(3) function in scp(1) when performing copy
536: operations using filenames that are supplied by the user from the
537: command line.</a>
1.319 brad 538: <li><a href="errata37.html#fd">Jan 5, 2006:
539: Do not allow users to trick suid programs into re-opening files via
540: /dev/fd.</a>
541: <li><a href="errata37.html#perl">Jan 5, 2006:
542: A buffer overflow has been found in the Perl interpreter with the
543: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 544: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 545: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 546: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 547: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 548: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 549: Fix a race condition in sudo(8) that could allow a user
1.315 millert 550: to run arbitrary commands.</a>
1.318 deraadt 551: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 552: Fix a buffer overflow, memory leaks, and NULL pointer
553: dereference in cvs(1).</a>
1.312 david 554: </ul>
555:
556: <li>
1.301 miod 557: <a name="36"></a>
558:
559: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
560: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 561: in <a href="anoncvs.html">OpenBSD current</a>. The
562: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
563: you should update your machine.
1.301 miod 564:
565: <p>
1.302 markus 566: <ul>
1.317 millert 567: <li><a href="errata36.html#libz2">Jul 21, 2005:
568: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 569: <li><a href="errata36.html#libz">Jul 6, 2005:
570: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 571: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 572: Fix a race condition in sudo(8) that could allow a user
1.315 millert 573: to run arbitrary commands.</a>
1.311 deraadt 574: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 575: Fix a buffer overflow, memory leaks, and NULL pointer
576: dereference in cvs(1).</a>
1.311 deraadt 577: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 578: Due to buffer overflows in telnet(1), a malicious
579: server or man-in-the-middle attack could allow
580: execution of arbitrary code with the privileges of
581: the user invoking telnet(1).</a>
1.311 deraadt 582: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 583: More stringent checking should be done in the copy(9)
584: functions to prevent their misuse.</a>
1.311 deraadt 585: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 586: More stringent checking should be done in the copy(9)
587: functions to prevent their misuse.</a>
1.311 deraadt 588: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 589: httpd(8)'s mod_include module fails to properly validate
590: the length of user supplied tag strings prior to copying
1.305 brad 591: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 592: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 593: On systems running isakmpd(8) it is possible for a local
594: user to cause kernel memory corruption and system panic by
1.303 markus 595: setting ipsec(4) credentials on a socket.</a>
1.302 markus 596: </ul>
1.301 miod 597:
598: <li>
1.288 matthieu 599: <a name="35"></a>
1.279 deraadt 600:
1.294 david 601: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 602: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 603: in <a href="anoncvs.html">OpenBSD current</a>. The
604: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
605: you should update your machine.
1.279 deraadt 606:
607: <p>
608: <ul>
1.310 brad 609: <li><a href="errata35.html#cvs4">Apr 28, 2005:
610: Fix a buffer overflow, memory leaks, and NULL pointer
611: dereference in cvs(1).</a>
1.309 brad 612: <li><a href="errata35.html#telnet">Mar 30, 2005:
613: Due to buffer overflows in telnet(1), a malicious
614: server or man-in-the-middle attack could allow
615: execution of arbitrary code with the privileges of
616: the user invoking telnet(1).</a>
1.308 brad 617: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 618: More stringent checking should be done in the copy(9)
619: functions to prevent their misuse.</a>
1.306 brad 620: <li><a href="errata35.html#locore">Feb 28, 2005:
621: More stringent checking should be done in the copy(9)
622: functions to prevent their misuse.</a>
1.304 brad 623: <li><a href="errata35.html#httpd3">Jan 12, 2005:
624: httpd(8)'s mod_include module fails to properly validate
625: the length of user supplied tag strings prior to copying
1.305 brad 626: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 627: <li><a href="errata35.html#pfkey">Dec 14, 2004:
628: On systems running isakmpd(8) it is possible for a local
629: user to cause kernel memory corruption and system panic by
1.303 markus 630: setting ipsec(4) credentials on a socket.</a>
1.301 miod 631: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 632: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 633: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 634: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 635: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 636: httpd(8)'s mod_rewrite module can be made to write one zero byte in
637: an arbitrary memory position outside of a char array, causing a DoS
638: or possibly buffer overflows.</a>
1.301 miod 639: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 640: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 641: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 642: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 643: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 644: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 645: Multiple remote vulnerabilities have been found in the cvs(1)
646: server which can be used by CVS clients to crash or execute
1.293 brad 647: arbitrary code on the server.</a>
1.301 miod 648: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 649: kdc(8) performs inadequate checking of request fields, leading
650: to the possibility of principal impersonation from other
651: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 652: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 653: xdm(1) ignores the requestPort resource and creates a
1.293 brad 654: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 655: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 656: A buffer overflow in the cvs(1) server has been found,
657: which can be used by CVS clients to execute arbitrary code on
1.293 brad 658: the server.</a>
1.301 miod 659: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 660: Integer overflow problems were found in procfs, allowing
1.293 brad 661: reading of arbitrary kernel memory.</a>
1.301 miod 662: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 663: Pathname validation problems have been found in cvs(1),
664: allowing clients and servers access to files outside the
1.293 brad 665: repository or local CVS tree.</a>
1.279 deraadt 666: </ul>
667:
668: <p>
669: <li>
1.288 matthieu 670: <a name="34"></a>
1.261 david 671:
1.294 david 672: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 673: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 674: in <a href="anoncvs.html">OpenBSD current</a>. The
675: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
676: you should update your machine.
1.261 david 677: <p>
678: <ul>
1.302 markus 679: <li><a href="errata34.html#pfkey">Dec 14, 2004:
680: On systems running isakmpd(8) it is possible for a local
681: user to cause kernel memory corruption and system panic by
1.303 markus 682: setting ipsec(4) credentials on a socket.</a>
1.298 brad 683: <li><a href="errata34.html#xpm">Sep 16, 2004:
684: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 685: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
686: httpd(8)'s mod_rewrite module can be made to write one zero byte in
687: an arbitrary memory position outside of a char array, causing a DoS
688: or possibly buffer overflows.</a>
1.294 david 689: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 690: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 691: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 692: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 693: an attacker can delete IPsec tunnels at will.</a>
1.294 david 694: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 695: Multiple remote vulnerabilities have been found in the cvs(1)
696: server which can be used by CVS clients to crash or execute
1.293 brad 697: arbitrary code on the server.</a>
1.294 david 698: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 699: kdc(8) performs inadequate checking of request fields, leading
700: to the possibility of principal impersonation from other
701: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 702: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 703: A buffer overflow in the cvs(1) server has been found,
704: which can be used by CVS clients to execute arbitrary code on
705: the server.</a>
1.294 david 706: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 707: Integer overflow problems were found in procfs, allowing
708: reading of arbitrary kernel memory.</a>
1.294 david 709: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 710: Pathname validation problems have been found in cvs(1),
711: allowing clients and servers access to files outside the
712: repository or local CVS tree.</a>
1.294 david 713: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 714: A missing check for a NULL-pointer dereference may allow a
1.281 otto 715: remote attacker to crash applications using OpenSSL.</a>
1.294 david 716: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 717: Defects in the payload validation and processing functions of
718: isakmpd have been discovered. An attacker could send malformed
719: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 720: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 721: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
722: access module, using IP addresses without a netmask on big endian
723: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 724: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 725: An IPv6 MTU handling problem exists that could be used by an
726: attacker to cause a denial of service attack.</a>
1.294 david 727: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 728: A reference counting bug in shmat(2) could be used to write to
729: kernel memory under certain circumstances.</a>
1.294 david 730: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 731: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 732: by Thomas Walpuski.</a>
1.294 david 733: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 734: It may be possible for a local user to overrun the stack in
735: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 736: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 737: The use of certain ASN.1 encodings or malformed public keys may
738: allow an attacker to mount a denial of service attack against
739: applications linked with ssl(3).</a>
1.261 david 740: </ul>
741:
742: <li>
1.288 matthieu 743: <a name="33"></a>
1.246 deraadt 744:
1.294 david 745: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 746: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 747: in <a href="anoncvs.html">OpenBSD current</a>. The
748: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 749: you should update your machine.
1.246 deraadt 750: <p>
751: <ul>
1.294 david 752: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 753: Pathname validation problems have been found in cvs(1),
754: allowing clients and servers access to files outside the
755: repository or local CVS tree.</a>
1.294 david 756: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 757: A missing check for a NULL-pointer dereference may allow a
1.281 otto 758: remote attacker to crash applications using OpenSSL.</a>
1.294 david 759: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 760: Defects in the payload validation and processing functions of
761: isakmpd have been discovered. An attacker could send malformed
762: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 763: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 764: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
765: access module, using IP addresses without a netmask on big endian
766: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 767: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 768: An IPv6 MTU handling problem exists that could be used by an
769: attacker to cause a denial of service attack.</a>
1.294 david 770: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 771: A reference counting bug in shmat(2) could be used to write to
772: kernel memory under certain circumstances.</a>
1.294 david 773: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 774: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 775: by Thomas Walpuski.</a>
1.294 david 776: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 777: It may be possible for a local user to execute arbitrary code
778: resulting in escalation of privileges due to a stack overrun
779: in compat_ibcs2(8).</a>
1.294 david 780: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 781: The use of certain ASN.1 encodings or malformed public keys may
782: allow an attacker to mount a denial of service attack against
783: applications linked with ssl(3).</a>
1.294 david 784: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 785: Access of freed memory in pf(4) could be used to
1.260 margarid 786: remotely panic a machine using scrub rules.</a>
1.294 david 787: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 788: A buffer overflow in the address parsing in
789: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 790: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 791: OpenSSH versions prior to 3.7 contains a buffer management error
792: that is potentially exploitable.</a>
1.294 david 793: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 794: Root may be able to reduce the security level by taking advantage of
795: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 796: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 797: An improper bounds check in the kernel may allow a local user
798: to panic the kernel.</a>
1.294 david 799: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 800: An off-by-one error exists in the C library function realpath(3)
801: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 802: </ul>
803:
1.265 miod 804:
1.247 david 805: <p>
1.246 deraadt 806: <li>
1.288 matthieu 807: <a name="32"></a>
1.224 deraadt 808:
1.294 david 809: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 810: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 811: in <a href="anoncvs.html">OpenBSD current</a>. The
812: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 813: you should update your machine.
1.224 deraadt 814: <p>
815: <ul>
1.294 david 816: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 817: The use of certain ASN.1 encodings or malformed public keys may
818: allow an attacker to mount a denial of service attack against
819: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 820: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 821: Access of freed memory in pf(4) could be used to
1.260 margarid 822: remotely panic a machine using scrub rules.</a>
1.294 david 823: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 824: A buffer overflow in the address parsing in
825: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 826: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 827: OpenSSH versions prior to 3.7 contains a buffer management error
828: that is potentially exploitable.</a>
1.294 david 829: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 830: Fix for a potential security issue in
831: sendmail(8) with respect to DNS maps.</a>
1.294 david 832: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 833: An off-by-one error exists in the C library function realpath(3)
834: may allow an attacker to gain escalated privileges.</a>
1.294 david 835: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 836: A buffer overflow in the address parsing in
837: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 838: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 839: A cryptographic weaknesses in the Kerberos v4 protocol can be
840: exploited on Kerberos v5 as well.</a>
1.294 david 841: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 842: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 843: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 844: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 845: Various SSL and TLS operations in OpenSSL are vulnerable to
846: timing attacks.</a>
1.294 david 847: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 848: A buffer overflow in lprm(1) may allow an attacker to elevate
849: privileges to user daemon.</a>.
1.294 david 850: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 851: A buffer overflow in the envelope comments processing in
852: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 853: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 854: httpd(8) leaks file inode numbers via ETag header as well as
855: child PIDs in multipart MIME boundary generation. This could
856: lead, for example, to NFS exploitation because it uses inode
857: numbers as part of the file handle.</a>
1.294 david 858: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 859: In ssl(8) an information leak can occur via timing by performing
860: a MAC computation even if incorrect block cipher padding has
861: been found, this is a countermeasure. Also, check for negative
862: sizes, in allocation routines.</a>
1.294 david 863: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 864: A double free exists in cvs(1) that could lead to privilege
865: escalation for cvs configurations where the cvs command is
1.233 margarid 866: run as a privileged user.</a>
1.294 david 867: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 868: A buffer overflow exists in named(8) that could lead to a
869: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 870: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 871: A logic error in the pool kernel memory allocator could cause
872: memory corruption in low-memory situations, causing the system
873: to crash.</a>
1.294 david 874: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 875: An attacker can bypass smrsh(8)'s restrictions and execute
876: arbitrary commands with the privileges of his own account.</a>
1.294 david 877: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 878: Network bridges running pf with scrubbing enabled could cause
879: mbuf corruption, causing the system to crash.</a>
1.294 david 880: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 881: A buffer overflow can occur in the kadmind(8) daemon, leading
882: to possible remote crash or exploit.</a>
1.224 deraadt 883: </ul>
884:
1.227 miod 885: <p>
886: <li>
1.288 matthieu 887: <a name="31"></a>
1.203 deraadt 888:
1.294 david 889: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 890: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 891: in <a href="anoncvs.html">OpenBSD current</a>. The
892: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 893: you should update your machine.
1.203 deraadt 894:
895: <p>
896: <ul>
1.294 david 897: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 898: A buffer overflow in the address parsing in
899: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 900: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 901: A cryptographic weaknesses in the Kerberos v4 protocol can be
902: exploited on Kerberos v5 as well.</a>
1.294 david 903: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 904: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 905: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 906: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 907: Various SSL and TLS operations in OpenSSL are vulnerable to
908: timing attacks.</a>
1.294 david 909: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 910: A buffer overflow in lprm(1) may allow an attacker to gain
911: root privileges.</a>
1.294 david 912: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 913: A buffer overflow in the envelope comments processing in
914: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 915: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 916: In ssl(8) an information leak can occur via timing by performing
917: a MAC computation even if incorrect block cipher padding has
918: been found, this is a countermeasure. Also, check for negative
919: sizes, in allocation routines.</a>
1.294 david 920: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 921: A double free exists in cvs(1) that could lead to privilege
922: escalation for cvs configurations where the cvs command is
1.294 david 923: run as a privileged user</a>.
924: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 925: A buffer overflow exists in named(8) that could lead to a
926: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 927: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 928: Incorrect argument checking in the getitimer(2) system call
929: may allow an attacker to crash the system.</a>
1.294 david 930: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 931: An attacker can bypass smrsh(8)'s restrictions and execute
932: arbitrary commands with the privileges of his own account.</a>
1.294 david 933: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 934: A buffer overflow can occur in the kadmind(8) daemon, leading
935: to possible remote crash or exploit.</a>
1.294 david 936: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 937: Incorrect argument checking in the setitimer(2) system call
938: may allow an attacker to write to kernel memory.</a>
1.294 david 939: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 940: An insufficient boundary check in the select system call
1.220 miod 941: allows an attacker to overwrite kernel memory and execute arbitrary code
942: in kernel context.</a>
1.294 david 943: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 944: Several remote buffer overflows can occur in the SSL2 server and SSL3
945: client of the ssl(8) library, as in the ASN.1 parser code in the
946: crypto(3) library, all of them being potentially remotely
947: exploitable.</a>
1.294 david 948: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 949: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
950: possible remote crash.</a>
1.294 david 951: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 952: A race condition exists in the pppd(8) daemon which may cause it to
953: alter the file permissions of an arbitrary file.</a>
1.294 david 954: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 955: Receiving IKE payloads out of sequence can cause isakmpd(8) to
956: crash.</a>
1.294 david 957: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 958: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 959: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 960: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 961: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 962: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 963: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 964: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 965: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 966: input validation error that can result in an integer overflow and
967: privilege escalation.</a>
1.294 david 968: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 969: A buffer overflow can occur during the interpretation of chunked
970: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 971: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 972: Under certain conditions, on systems using YP with netgroups
973: in the password database, it is possible that sshd(8) does
974: ACL checks for the requested user name but uses the password
975: database entry of a different user for authentication. This
976: means that denied users might authenticate successfully
977: while permitted users could be locked out.</a>
1.294 david 978: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 979: A race condition exists that could defeat the kernel's
980: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 981: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 982: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 983: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 984: A local user can gain super-user privileges due to a buffer
985: overflow in sshd(8) if AFS has been configured on the system
986: or if KerberosTgtPassing or AFSTokenPassing has been enabled
987: in the sshd_config file.</a>
1.203 deraadt 988: </ul>
989:
1.235 miod 990: <p>
1.203 deraadt 991: <li>
1.288 matthieu 992: <a name="30"></a>
1.187 deraadt 993:
1.294 david 994: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 995: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 996: in <a href="anoncvs.html">OpenBSD current</a>. The
997: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 998: you should update your machine.
1.187 deraadt 999:
1000: <p>
1001: <ul>
1.294 david 1002: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1003: A buffer overflow exists in named(8) that could lead to a
1004: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1005: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1006: Incorrect argument checking in the getitimer(2) system call
1007: may allow an attacker to crash the system.</a>
1.294 david 1008: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1009: An attacker can bypass smrsh(8)'s restrictions and execute
1010: arbitrary commands with the privileges of his own account.</a>
1.294 david 1011: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1012: A buffer overflow can occur in the kadmind(8) daemon, leading
1013: to possible remote crash or exploit.</a>
1.294 david 1014: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1015: Incorrect argument checking in the setitimer(2) system call
1016: may allow an attacker to write to kernel memory.</a>
1.294 david 1017: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1018: An insufficient boundary check in the select and poll system calls
1019: allows an attacker to overwrite kernel memory and execute arbitrary code
1020: in kernel context.</a>
1.294 david 1021: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1022: Several remote buffer overflows can occur in the SSL2 server and SSL3
1023: client of the ssl(8) library, as in the ASN.1 parser code in the
1024: crypto(3) library, all of them being potentially remotely
1025: exploitable.</a>
1.294 david 1026: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1027: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1028: possible remote crash.</a>
1.294 david 1029: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1030: A race condition exists in the pppd(8) daemon which may cause it to
1031: alter the file permissions of an arbitrary file.</a>
1.294 david 1032: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1033: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1034: crash.</a>
1.294 david 1035: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1036: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1037: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1038: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1039: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1040: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1041: input validation error that can result in an integer overflow and
1042: privilege escalation.</a>
1.294 david 1043: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1044: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1045: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1046: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1047: A buffer overflow can occur during the interpretation of chunked
1048: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1049: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1050: A race condition exists that could defeat the kernel's
1051: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1052: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1053: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1054: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1055: A local user can gain super-user privileges due to a buffer
1056: overflow in sshd(8) if AFS has been configured on the system
1057: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1058: in the sshd_config file.</a>
1.294 david 1059: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1060: The mail(1) was interpreting tilde escapes even when invoked
1061: in non-interactive mode. As mail(1) is called as root from cron,
1062: this can lead to a local root compromise.</a>
1.294 david 1063: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1064: Under certain conditions, on systems using YP with netgroups in
1065: the password database, it is possible for the rexecd(8) and rshd(8)
1066: daemons to execute a shell from a password database entry for a
1067: different user. Similarly, atrun(8) may change to the wrong
1068: home directory when running jobs.</a>
1.294 david 1069: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1070: A potential double free() exists in the zlib library;
1071: this is not exploitable on OpenBSD.
1072: The kernel also contains a copy of zlib; it is not
1073: currently known if the kernel zlib is exploitable.</a>
1.294 david 1074: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1075: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1076: may allow a local user to gain super-user privileges.</a>
1.294 david 1077: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1078: A race condition between the ptrace(2) and execve(2) system calls
1079: allows an attacker to modify the memory contents of suid/sgid
1080: processes which could lead to compromise of the super-user account.</a>
1.294 david 1081: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1082: There is a security hole in sudo(8) that can be exploited
1083: when the Postfix sendmail replacement is installed that may
1084: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1085: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1086: An attacker can trick a machine running the lpd daemon into
1087: creating new files in the root directory from a machine with
1088: remote line printer access.</a>
1.294 david 1089: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1090: The vi.recover script can be abused in such a way as
1091: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1092: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1093: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1094: resulting in a crash.</a>
1.294 david 1095: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1096: A security hole that may allow an attacker to partially authenticate
1097: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1098: </ul>
1099:
1100: <p>
1101: <li>
1.288 matthieu 1102: <a name="29"></a>
1.173 deraadt 1103:
1.294 david 1104: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1105: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1106: in <a href="anoncvs.html">OpenBSD current</a>. The
1107: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1108: you should update your machine.
1109:
1.173 deraadt 1110:
1111: <p>
1112: <ul>
1.294 david 1113: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1114: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1115: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1116: A race condition exists that could defeat the kernel's
1117: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1118: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1119: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1120: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1121: A local user can gain super-user privileges due to a buffer
1122: overflow in sshd(8) if AFS has been configured on the system
1123: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1124: in the sshd_config file.</a>
1.294 david 1125: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1126: The mail(1) was interpreting tilde escapes even when invoked
1127: in non-interactive mode. As mail(1) is called as root from cron,
1128: this can lead to a local root compromise.</a>
1.294 david 1129: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1130: A potential double free() exists in the zlib library;
1131: this is not exploitable on OpenBSD.
1132: The kernel also contains a copy of zlib; it is not
1133: currently known if the kernel zlib is exploitable.</a>
1.294 david 1134: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1135: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1136: may allow a local user to gain super-user privileges.</a>
1.294 david 1137: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1138: A race condition between the ptrace(2) and execve(2) system calls
1139: allows an attacker to modify the memory contents of suid/sgid
1140: processes which could lead to compromise of the super-user account.</a>
1.294 david 1141: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1142: There is a security hole in sudo(8) that can be exploited
1143: when the Postfix sendmail replacement is installed that may
1144: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1145: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1146: An attacker can trick a machine running the lpd daemon into
1147: creating new files in the root directory from a machine with
1148: remote line printer access.</a>
1.294 david 1149: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1150: The vi.recover script can be abused in such a way as
1151: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1152: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1153: A security hole exists in uuxqt(8) that may allow an
1154: attacker to gain root privileges.</a>
1.294 david 1155: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1156: A security hole exists in lpd(8) that may allow an
1157: attacker to gain root privileges if lpd is running.</a>
1.294 david 1158: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1159: A security hole exists in sendmail(8) that may allow an
1160: attacker on the local host to gain root privileges.</a>
1.294 david 1161: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1162: A kernel buffer overflow in the NFS code can be used to execute
1163: arbitrary code by users with mount privileges (only root by
1.181 millert 1164: default).</a>
1.294 david 1165: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1166: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1167: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1168: sshd(8) allows users to delete arbitrary files named "cookies"
1169: if X11 forwarding is enabled. X11 forwarding is disabled
1170: by default.</a>
1.294 david 1171: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1172: Programs using the fts routines can be tricked into changing
1173: into the wrong directory.</a>
1.294 david 1174: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1175: Sendmail signal handlers contain unsafe code,
1176: leading to numerous race conditions.</a>
1.173 deraadt 1177: </ul>
1178:
1179: <p>
1180: <li>
1.288 matthieu 1181: <a name="28"></a>
1.152 deraadt 1182:
1.294 david 1183: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1184: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1185: in <a href="anoncvs.html">OpenBSD current</a>. The
1186: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1187: you should update your machine.
1188:
1.152 deraadt 1189:
1190: <p>
1191: <ul>
1.294 david 1192: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1193: A security hole exists in uuxqt(8) that may allow an
1194: attacker to gain root privileges.</a>
1.294 david 1195: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1196: A security hole exists in lpd(8) that may allow an
1197: attacker to gain root privileges if lpd is running.</a>
1.294 david 1198: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1199: A security hole exists in sendmail(8) that may allow an
1200: attacker on the local host to gain root privileges.</a>
1.294 david 1201: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1202: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1203: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1204: Programs using the fts routines can be tricked into changing
1205: into the wrong directory.</a>
1.294 david 1206: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1207: Sendmail signal handlers contain unsafe code,
1208: leading to numerous race conditions.</a>
1.294 david 1209: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1210: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1211: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1212: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1213: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1214: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1215: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1216: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1217: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1218: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1219: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1220: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1221: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1222: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1223: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1224: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1225: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1226: rnd(4) did not use all of its input when written to.</a>
1.294 david 1227: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1228: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1229: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1230: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1231: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1232: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1233: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1234: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1235: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1236: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1237: </ul>
1238:
1239: <p>
1240: <li>
1.288 matthieu 1241: <a name="27"></a>
1.124 deraadt 1242:
1.294 david 1243: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1244: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1245: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1246: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1247:
1248: <p>
1249: <ul>
1.294 david 1250: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1251: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1252: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1253: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1254: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1255: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1256: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1257: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1258: (patch included)</a>
1.294 david 1259: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1260: X11 libraries have 2 potential overflows in xtrans code.
1261: (patch included)</a>
1.294 david 1262: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1263: Apache mod_rewrite and mod_vhost_alias modules could expose files
1264: on the server in certain configurations if used.
1265: (patch included)</a>
1.294 david 1266: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1267: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1268: TERMPATH and TERMCAP environment variables as it should.
1269: (patch included)</a>
1.294 david 1270: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1271: There are printf-style format string bugs in several privileged
1272: programs. (patch included)</a>
1.294 david 1273: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1274: libcurses honored terminal descriptions in the $HOME/.terminfo
1275: directory as well as in the TERMCAP environment variable for
1276: setuid and setgid applications.
1.146 deraadt 1277: (patch included)</a>
1.294 david 1278: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1279: A format string vulnerability exists in talkd(8).
1280: (patch included)</a>
1.294 david 1281: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1282: A format string vulnerability exists in the pw_error() function of the
1283: libutil library, yielding localhost root through chpass(1).
1284: (patch included)</a>
1.294 david 1285: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1286: Bad ESP/AH packets could cause a crash under certain conditions.
1287: (patch included)</a>
1.294 david 1288: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1289: A format string vulnerability (localhost root) exists in xlock(1).
1290: (patch included)</a>
1.294 david 1291: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1292: Various bugs found in X11 libraries have various side effects, almost
1293: completely denial of service in OpenBSD.
1294: (patch included)</a>
1.294 david 1295: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1296: Just like pretty much all the other unix ftp daemons
1297: on the planet, ftpd had a remote root hole in it.
1298: Luckily, ftpd was not enabled by default.
1.137 deraadt 1299: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1300: (patch included)</a>
1.294 david 1301: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1302: Mopd, very rarely used, contained some buffer overflows.
1303: (patch included)</a>
1.294 david 1304: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1305: libedit would check for a <b>.editrc</b> file in the current
1306: directory. Not known to be a real security issue, but a patch
1307: is available anyways.
1308: (patch included)</a>
1.294 david 1309: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1310: A serious bug in dhclient(8) could allow strings from a
1311: malicious dhcp server to be executed in the shell as root.
1312: (patch included)</a>
1.294 david 1313: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1314: A serious bug in isakmpd(8) policy handling wherein
1315: policy verification could be completely bypassed in isakmpd.
1316: (patch included)</a>
1.294 david 1317: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1318: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1319: should not be used, and results in security problems on
1320: other operating systems.</a>
1.294 david 1321: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1322: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1323: (patch included)</a>
1.294 david 1324: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1325: Improper use of ipf <i>keep-state</i> rules can result
1326: in firewall rules being bypassed. (patch included)</a>
1327:
1.124 deraadt 1328: </ul>
1329:
1330: <p>
1331: <li>
1.288 matthieu 1332: <a name="26"></a>
1.119 deraadt 1333:
1.294 david 1334: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1335: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1336: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1337: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1338:
1339: <p>
1340: <ul>
1.294 david 1341: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1342: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1343: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1344: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1345: Improper use of ipf <i>keep-state</i> rules can result
1346: in firewall rules being bypassed. (patch included)</a>
1.294 david 1347: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1348: xlockmore has a bug which a localhost attacker can use to gain
1349: access to the encrypted root password hash (which is normally
1.245 miod 1350: encoded using blowfish</a> (see
1.294 david 1351: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1352: crypt(3)</a>)
1.245 miod 1353: (patch included).
1.294 david 1354: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1355: Systems running with procfs enabled and mounted are
1356: vulnerable to a very tricky exploit. procfs is not
1357: mounted by default.
1358: (patch included).</a>
1.294 david 1359: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1360: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1361: thus exposing the system to a race where the aliases file
1362: did not exist.
1.119 deraadt 1363: (patch included).</a>
1.294 david 1364: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1365: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1366: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1367: A buffer overflow in the RSAREF code included in the
1368: USA version of libssl, is possibly exploitable in
1369: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1370: (patch included).<br></a>
1371: <strong>Update:</strong> Turns out that this was not exploitable
1372: in any of the software included in OpenBSD 2.6.
1.294 david 1373: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1374: Any user could change interface media configurations, resulting in
1375: a localhost denial of service attack.
1.121 deraadt 1376: (patch included).</a>
1.119 deraadt 1377: </ul>
1378:
1379: <p>
1380: <li>
1.288 matthieu 1381: <a name="25"></a>
1.106 deraadt 1382:
1.294 david 1383: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1384: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1385: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1386: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1387:
1.96 deraadt 1388: <p>
1.104 deraadt 1389: <ul>
1.294 david 1390: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1391: In cron(8), make sure argv[] is NULL terminated in the
1392: fake popen() and run sendmail as the user, not as root.
1393: (patch included).</a>
1.294 david 1394: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1395: filesystems had an overrun in their handling of uio_offset
1396: in their readdir() routines. (These filesystems are not
1397: enabled by default). (patch included).</a>
1.294 david 1398: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1399: when we execve() a new process. (patch included).</a>
1.294 david 1400: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1401: been handled by IPsec may be transmitted as cleartext.
1402: PF_KEY SA expirations may leak kernel resources.
1403: (patch included).</a>
1.294 david 1404: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1405: motd re-writing and change the find(1) to use -execdir
1406: (patch included).</a>
1.294 david 1407: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1408: users to chflags(2) or fchflags(2) on character or block devices
1409: which they may currently be the owner of (patch included).</a>
1.294 david 1410: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1411: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1412: </ul>
1413:
1.106 deraadt 1414: <p>
1415: <li>
1.288 matthieu 1416: <a name="24"></a>
1.235 miod 1417:
1.294 david 1418: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1419: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1420: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1421: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1422:
1.96 deraadt 1423: <p>
1.75 deraadt 1424: <ul>
1.294 david 1425: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1426: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1427: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1428: another kernel crash case caused by the <strong>crashme</strong>
1429: program (patch included).</a>
1.294 david 1430: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1431: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1432: (patch included).</a>
1.294 david 1433: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1434: existed in ping(8). (patch included).</a>
1.294 david 1435: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1436: the ipq, which could permit an attacker to cause a crash.
1437: (patch included).</a>
1.294 david 1438: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1439: kernel between accept(2) and select(2) could permit an attacker
1440: to hang sockets from remote.
1441: (patch included).</a>
1.294 david 1442: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1443: bog the machine excessively and cause problems.
1444: (patch included).</a>
1.294 david 1445: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1446: DDB interacted to possibly cause a crash.
1447: (patch included).</a>
1.294 david 1448: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1449: (patch included).</a>
1.294 david 1450: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1451: problem in bootpd(8). (patch included).</a>
1.294 david 1452: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1453: exploitable problem relating to environment variables in termcap
1454: and curses. (patch included).</a>
1.294 david 1455: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1456: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1457: </ul>
1458:
1.106 deraadt 1459: <p>
1460: <li>
1.288 matthieu 1461: <a name="23"></a>
1.235 miod 1462:
1.294 david 1463: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1464: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1465: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1466: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1467:
1.96 deraadt 1468: <p>
1.53 matthieu 1469: <ul>
1.294 david 1470: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1471: problem in bootpd(8). (patch included).</a>
1.294 david 1472: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1473: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1474: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1475: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1476: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1477: chpass(1) has a file descriptor leak which allows an
1478: attacker to modify /etc/master.passwd.</a>
1.294 david 1479: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1480: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1481: should not be executed with fd slots 0, 1, or 2 free.
1482: (patch included).</a>
1.294 david 1483: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1484: libraries (patches included).</a>
1.294 david 1485: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1486: processes too permissive (4th revision patch included).</a>
1.294 david 1487: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1488: of immutable and append-only file flags. (patch included).</a>
1.294 david 1489: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1490: if IPSEC is enabled (patch included).</a>
1.294 david 1491: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1492: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1493: </ul>
1.9 deraadt 1494:
1.106 deraadt 1495: <p>
1496: <li>
1.288 matthieu 1497: <a name="22"></a>
1.235 miod 1498:
1.294 david 1499: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1500: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1501: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1502: still exist in other operating systems. (The supplied patches are for
1503: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1504:
1.96 deraadt 1505: <p>
1.9 deraadt 1506: <ul>
1.294 david 1507: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1508: packets if IPSEC is enabled (patch included).</a>
1.294 david 1509: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1510: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1511: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1512: (patch included).</a>
1.294 david 1513: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1514: (patch included).</a>
1.294 david 1515: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1516: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1517: (patch included).</a>
1.294 david 1518: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1519: export (patch included).</a>
1.112 philen 1520: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1521: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1522: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1523: Acceptance.</a>
1.294 david 1524: A patch is available <a href="errata22.html#sourceroute">here</a>.
1525: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1526: flaw (patch included).</a>
1.294 david 1527: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1528: </ul>
1529:
1.106 deraadt 1530: <p>
1531: <li>
1.288 matthieu 1532: <a name="21"></a>
1.235 miod 1533:
1.294 david 1534: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1535: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1536: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1537: exist in other operating systems. (If you are running OpenBSD 2.1, we
1538: would strongly recommend an upgrade to the newest release, as this
1539: patch list only attempts at fixing the most important security
1540: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1541: security problems. Many of those problems were solved in ways which
1542: make it hard for us to provide patches).
1543:
1.96 deraadt 1544: <p>
1.52 deraadt 1545: <ul>
1.112 philen 1546: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1547: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1548: (patch included)</a>
1.112 philen 1549: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1550: </ul>
1.51 deraadt 1551:
1.106 deraadt 1552: <p>
1553: <li>
1.288 matthieu 1554: <a name="20"></a>
1.235 miod 1555:
1.294 david 1556: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1557: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1558: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1559: exist in other operating systems. (If you are running OpenBSD 2.0, we
1560: commend you for being there back in the old days!, but you're really
1561: missing out if you don't install a new version!)
1562:
1563: <p>
1564: <ul>
1.112 philen 1565: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1566: resolver (patch included)</a>
1567: <li>Many others... if people can hunt them down, please let me know
1568: and we'll put them up here.
1569: </ul>
1.51 deraadt 1570: <p>
1.106 deraadt 1571:
1.288 matthieu 1572: <a name="watching"></a>
1.294 david 1573: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1574:
1.21 deraadt 1575: Since we take a proactive stance with security, we are continually
1576: finding and fixing new security problems. Not all of these problems
1.80 espie 1577: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1578: confirmed to be exploitable; many simple bugs we fix do turn out to
1579: have security consequences we could not predict. We do not have the
1580: time resources to make these changes available in the above format.<p>
1.21 deraadt 1581:
1582: Thus there are usually minor security fixes in the current source code
1583: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1584: guarantee that these problems are of minimal impact and unproven
1.44 ian 1585: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1586: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1587:
1.45 deraadt 1588: People who are really concerned with security can do a number of
1589: things:<p>
1.21 deraadt 1590:
1591: <ul>
1592: <li>If you understand security issues, watch our
1.294 david 1593: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1594: eye out for things which appear security related. Since
1.21 deraadt 1595: exploitability is not proven for many of the fixes we make,
1596: do not expect the relevant commit message to say "SECURITY FIX!".
1597: If a problem is proven and serious, a patch will be available
1598: here very shortly after.
1.161 horacio 1599: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1600: security-announce mailing list</a> which will notify you for every
1.186 ian 1601: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1602: and instruct you on how to patch the problem.
1.21 deraadt 1603: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1604: complete system build from time to time (read /usr/src/Makefile
1605: carefully). Users can make the assumption that the current
1606: source tree always has stronger security than the previous release.
1.45 deraadt 1607: However, building your own system from source code is not trivial;
1.265 miod 1608: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1609: transition between major releases.
1.115 ericj 1610: <li>Install a binary snapshot for your
1.80 espie 1611: architecture, which are made available fairly often. For
1.29 deraadt 1612: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1613: </ul>
1614:
1.9 deraadt 1615: <p>
1.288 matthieu 1616: <a name="reporting"></a>
1.294 david 1617: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1618:
1.5 deraadt 1619: <p> If you find a new security problem, you can mail it to
1.294 david 1620: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1621: <br>
1.5 deraadt 1622: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1623: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1624:
1.107 deraadt 1625: <p>
1.288 matthieu 1626: <a name="papers"></a>
1.294 david 1627: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1628:
1629: A number of papers have been written by OpenBSD team members, about security
1630: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1631: documents are available as follows.<p>
1.107 deraadt 1632:
1633: <ul>
1.113 deraadt 1634: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1635: <a href="events.html#usenix99">Usenix 1999</a>,
1636: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1637: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1638: <a href="papers/bcrypt-paper.ps">paper</a> and
1639: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1640: <p>
1641: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1642: <a href="events.html#usenix99">Usenix 1999</a>,
1643: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1644: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1645: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1646: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1647: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1648: <a href="papers/crypt-paper.ps">paper</a> and
1649: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1650: <p>
1651: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1652: <a href="events.html#usenix99">Usenix 1999</a>,
1653: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1654: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1655: <a href="papers/strlcpy-paper.ps">paper</a> and
1656: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1657: <p>
1.118 deraadt 1658: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1659: <a href="events.html#lisa99">LISA 1999</a>,
1660: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1661: <a href="papers/authgw-paper.ps">paper</a> and
1662: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1663: <p>
1.153 jufi 1664: <li>Encrypting Virtual Memory<br>
1.294 david 1665: <a href="events.html#sec2000">Usenix Security 2000</a>,
1666: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1667: <a href="papers/swapencrypt.ps">paper</a> and
1668: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1669: <p>
1.107 deraadt 1670: </ul>
1.294 david 1671: </ul>
1.106 deraadt 1672:
1.2 deraadt 1673: <hr>
1.294 david 1674: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1675: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1676: <br>
1.366 ! miod 1677: <small>$OpenBSD: security.html,v 1.365 2008/10/31 16:39:46 deraadt Exp $</small>
1.1 deraadt 1678:
1.24 deraadt 1679: </body>
1680: </html>
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