Annotation of www/security.html, Revision 1.367
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1.20 deraadt 5: <title>OpenBSD Security</title>
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1.210 jsyn 17: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 18: <p>
1.294 david 19: <h2><font color="#e00000">Security</font></h2>
20: <hr>
1.1 deraadt 21:
1.114 philen 22: <table width="100%">
23: <tr>
24: <td colspan="2">
25: <strong>Index</strong>
26: </td>
27: </tr>
28: <tr>
29: <td valign="top">
1.294 david 30: <a href="#goals">Security goals of the Project</a>.<br>
31: <a href="#disclosure">Full Disclosure policy</a>.<br>
32: <a href="#process">Source code auditing process</a>.<br>
33: <a href="#default">"Secure by Default"</a>.<br>
34: <a href="#crypto">Use of Cryptography</a>.<br>
35: <p>
36: <a href="#watching">Watching changes</a>.<br>
37: <a href="#reporting">Reporting security issues</a>.<br>
38: <a href="#papers">Further Reading</a><br>
1.106 deraadt 39: <p>
1.114 philen 40: </td>
41: <td valign="top">
1.225 deraadt 42: For security advisories for specific releases, click below:<br>
43: <a href="#20">2.0</a>,
44: <a href="#21">2.1</a>,
45: <a href="#22">2.2</a>,
46: <a href="#23">2.3</a>,
47: <a href="#24">2.4</a>,
48: <a href="#25">2.5</a>,
49: <a href="#26">2.6</a>,
50: <a href="#27">2.7</a>,
51: <a href="#28">2.8</a>,
52: <a href="#29">2.9</a>,
53: <a href="#30">3.0</a>,
54: <a href="#31">3.1</a>,
1.246 deraadt 55: <a href="#32">3.2</a>,
1.261 david 56: <a href="#33">3.3</a>,
1.365 deraadt 57: <br>
1.280 david 58: <a href="#34">3.4</a>,
1.301 miod 59: <a href="#35">3.5</a>,
1.312 david 60: <a href="#36">3.6</a>,
1.318 deraadt 61: <a href="#37">3.7</a>,
1.321 brad 62: <a href="#38">3.8</a>,
1.334 brad 63: <a href="#39">3.9</a>,
1.348 merdely 64: <a href="#40">4.0</a>,
65: <a href="#41">4.1</a>,
1.357 brad 66: <a href="#42">4.2</a>,
1.365 deraadt 67: <a href="#43">4.3</a>,
68: <a href="#44">4.4</a>.
1.114 philen 69: </td>
70: </tr>
71: </table>
1.56 deraadt 72: <hr>
73:
1.294 david 74: <a name="goals"></a>
1.278 deraadt 75: <ul>
1.294 david 76: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 77:
1.14 deraadt 78: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 79: ONE in the industry for security (if we are not already there). Our
80: open software development model permits us to take a more
81: uncompromising view towards increased security than Sun, SGI, IBM, HP,
82: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 83: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 84: cryptography</a>, we are able to take cryptographic approaches towards
85: fixing security problems.<p>
1.18 deraadt 86:
1.288 matthieu 87: <a name="disclosure"></a>
1.294 david 88: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 89:
1.45 deraadt 90: Like many readers of the
1.196 jufi 91: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 92: BUGTRAQ mailing list</a>,
1.106 deraadt 93: we believe in full disclosure of security problems. In the
94: operating system arena, we were probably the first to embrace
95: the concept. Many vendors, even of free software, still try
96: to hide issues from their users.<p>
97:
98: Security information moves very fast in cracker circles. On the other
99: hand, our experience is that coding and releasing of proper security
100: fixes typically requires about an hour of work -- very fast fix
101: turnaround is possible. Thus we think that full disclosure helps the
102: people who really care about security.<p>
103:
1.288 matthieu 104: <a name="process"></a>
1.294 david 105: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 106:
1.12 deraadt 107: Our security auditing team typically has between six and twelve
1.45 deraadt 108: members who continue to search for and fix new security holes. We
109: have been auditing since the summer of 1996. The process we follow to
110: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 111: every critical software component. We are not so much looking for
112: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 113: years later someone discovers the problem used to be a security
1.106 deraadt 114: issue, and we fixed it because it was just a bug, well, all the
115: better. Flaws have been found in just about every area of the system.
116: Entire new classes of security problems have been found during our
117: audit, and often source code which had been audited earlier needs
118: re-auditing with these new flaws in mind. Code often gets audited
119: multiple times, and by multiple people with different auditing
120: skills.<p>
1.12 deraadt 121:
1.94 deraadt 122: Some members of our security auditing team worked for Secure Networks,
123: the company that made the industry's premier network security scanning
124: software package Ballista (Secure Networks got purchased by Network
125: Associates, Ballista got renamed to Cybercop Scanner, and well...)
126: That company did a lot of security research, and thus fit in well
1.106 deraadt 127: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
128: colours since day 1.<p>
1.31 deraadt 129:
1.34 deraadt 130: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 131: In most cases we have found that the determination of exploitability
132: is not an issue. During our ongoing auditing process we find many
133: bugs, and endeavor to fix them even though exploitability is not
134: proven. We fix the bug, and we move on to find other bugs to fix. We
135: have fixed many simple and obvious careless programming errors in code
136: and only months later discovered that the problems were in fact
137: exploitable. (Or, more likely someone on
1.197 jufi 138: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 139: would report that other operating systems were vulnerable to a `newly
140: discovered problem', and then it would be discovered that OpenBSD had
141: been fixed in a previous release). In other cases we have been saved
142: from full exploitability of complex step-by-step attacks because we
143: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 144: managed such a success is the lpd advisory that Secure Networks put out.
145: <p>
1.29 deraadt 146:
1.288 matthieu 147: <a name="newtech"></a>
1.294 david 148: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 149:
150: As we audit source code, we often invent new ways of solving problems.
151: Sometimes these ideas have been used before in some random application
152: written somewhere, but perhaps not taken to the degree that we do.
153: <p>
154:
155: <ul>
156: <li>strlcpy() and strlcat()
157: <li>Memory protection purify
158: <ul>
159: <li>W^X
160: <li>.rodata segment
161: <li>Guard pages
162: <li>Randomized malloc()
163: <li>Randomized mmap()
164: <li>atexit() and stdio protection
165: </ul>
1.295 otto 166: <li>Privilege separation
1.278 deraadt 167: <li>Privilege revocation
168: <li>Chroot jailing
169: <li>New uids
170: <li>ProPolice
171: <li>... and others
172: </ul>
173: <p>
174:
1.294 david 175: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 176:
1.45 deraadt 177: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 178: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 179: commonplace in security forums like
1.197 jufi 180: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 181:
1.45 deraadt 182: The most intense part of our security auditing happened immediately
1.80 espie 183: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 184: over the last third of 1996 and first half of 1997. Thousands (yes,
185: thousands) of security issues were fixed rapidly over this year-long
186: period; bugs like the standard buffer overflows, protocol
187: implementation weaknesses, information gathering, and filesystem
188: races. Hence most of the security problems that we encountered were
189: fixed before our 2.1 release, and then a far smaller number needed
190: fixing for our 2.2 release. We do not find as many problems anymore,
191: it is simply a case of diminishing returns. Recently the security
192: problems we find and fix tend to be significantly more obscure or
193: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 194:
1.35 deraadt 195: <ul>
1.45 deraadt 196: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 197: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 198: to search for more complicated exploits, so we will too.
199: <li>Finding and fixing subtle flaws in complicated software is
200: a lot of fun.
1.35 deraadt 201: </ul>
1.106 deraadt 202: <p>
1.15 deraadt 203:
1.14 deraadt 204: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 205: to find and fix new security flaws.<p>
1.12 deraadt 206:
1.288 matthieu 207: <a name="default"></a>
1.294 david 208: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 209:
210: To ensure that novice users of OpenBSD do not need to become security
211: experts overnight (a viewpoint which other vendors seem to have), we
212: ship the operating system in a Secure by Default mode. All non-essential
213: services are disabled. As the user/administrator becomes more familiar
214: with the system, he will discover that he has to enable daemons and other
215: parts of the system. During the process of learning how to enable a new
216: service, the novice is more likely to learn of security considerations.<p>
217:
218: This is in stark contrast to the increasing number of systems that
219: ship with NFS, mountd, web servers, and various other services enabled
220: by default, creating instantaneous security problems for their users
221: within minutes after their first install.<p>
222:
1.288 matthieu 223: <a name="crypto"></a>
1.294 david 224: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 225:
226: And of course, since the OpenBSD project is based in Canada, it is possible
227: for us to integrate cryptography. For more information, read the page
1.116 deraadt 228: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 229:
1.294 david 230: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 231:
232: <li>
1.365 deraadt 233: <a name="44"></a>
234:
235: <h3><font color="#e00000">OpenBSD 4.4 Security Advisories</font></h3>
236: These are the OpenBSD 4.4 advisories -- all these problems are solved
237: in <a href=anoncvs.html>OpenBSD current</a> and the
238: <a href=stable.html>patch branch</a>.
239:
240: <p>
241: <ul>
1.367 ! brad 242: <li><a href="errata44.html#001_ndp">November 2, 2008:
! 243: The Neighbor Discovery Protocol (ndp) did not correctly verify
! 244: neighbor solicitation requests maybe allowing a nearby attacker
! 245: to intercept traffic.</a>
1.365 deraadt 246: </ul>
247:
248: <li>
1.357 brad 249: <a name="43"></a>
250:
251: <h3><font color="#e00000">OpenBSD 4.3 Security Advisories</font></h3>
252: These are the OpenBSD 4.3 advisories -- all these problems are solved
253: in <a href=anoncvs.html>OpenBSD current</a> and the
254: <a href=stable.html>patch branch</a>.
255:
256: <p>
257: <ul>
1.363 brad 258: <li><a href="errata43.html#005_ndp">October 2, 2008:
259: The Neighbor Discovery Protocol (ndp) did not correctly verify
260: neighbor solicitation requests maybe allowing a nearby attacker
261: to intercept traffic.</a>
1.362 brad 262: <li><a href="errata43.html#004_bind">July 23, 2008:
263: A vulnerability has been found with BIND.</a>
1.361 brad 264: <li><a href="errata43.html#003_xorg">July 15, 2008:
265: Multiple vulnerabilities in X.Org.</a>
1.359 brad 266: <li><a href="errata43.html#002_openssh2">April 3, 2008:
1.360 tobias 267: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 268: <li><a href="errata43.html#001_openssh">March 30, 2008:
269: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 270: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.357 brad 271: </ul>
272:
1.366 miod 273: <p>
274: OpenBSD 4.2 and earlier releases are not supported anymore. The following
275: paragraphs only list advisories issued while they were maintained; these
276: releases are likely to be affected by the advisories for more recent releases.
277: <br>
1.357 brad 278:
279: <li>
1.348 merdely 280: <a name="42"></a>
281:
282: <h3><font color="#e00000">OpenBSD 4.2 Security Advisories</font></h3>
283: These are the OpenBSD 4.2 advisories -- all these problems are solved
284: in <a href=anoncvs.html>OpenBSD current</a> and the
285: <a href=stable.html>patch branch</a>.
286:
287: <p>
288: <ul>
1.364 tobias 289: <li><a href="errata42.html#015_ndp">October 2, 2008:
1.363 brad 290: The Neighbor Discovery Protocol (ndp) did not correctly verify
291: neighbor solicitation requests maybe allowing a nearby attacker
292: to intercept traffic.</a>
1.362 brad 293: <li><a href="errata42.html#013_bind">July 23, 2008:
294: A vulnerability has been found with BIND.</a>
1.361 brad 295: <li><a href="errata42.html#012_xorg2">July 15, 2008:
296: Multiple vulnerabilities in X.Org.</a>
1.359 brad 297: <li><a href="errata42.html#011_openssh2">April 3, 2008:
1.360 tobias 298: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 299: <li><a href="errata42.html#010_openssh">March 30, 2008:
300: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 301: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 302: <li><a href="errata42.html#009_ppp">March 7, 2008:
303: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 304: <li><a href="errata42.html#006_xorg">Feb 8, 2008:
305: Multiple vulnerabilities in X.Org.</a>
1.352 henning 306: <li><a href="errata42.html#005_ifrtlabel">Jan 11, 2008:
307: A missing NULL pointer check can lead to a kernel panic.</a>
308: <li><a href="errata42.html#004_pf">Nov 27, 2007:
309: A memory leak in pf can lead to machine lockups.</a>
1.351 okan 310: <li><a href="errata42.html#002_openssl">Oct 10, 2007:
311: Fix off-by-one overflow in OpenSSL.</a>
1.350 deraadt 312: <li><a href="errata42.html#001_dhcpd">Oct 9, 2007:
1.349 deraadt 313: Fix stack corruption problem in dhcpd(8).</a>
1.348 merdely 314: </ul>
315:
316: <li>
1.346 matthieu 317: <a name="41"></a>
318:
319: <h3><font color="#e00000">OpenBSD 4.1 Security Advisories</font></h3>
320: These are the OpenBSD 4.1 advisories -- all these problems are solved
321: in <a href=anoncvs.html>OpenBSD current</a> and the
322: <a href=stable.html>patch branch</a>.
323:
324: <p>
325: <ul>
1.359 brad 326: <li><a href="errata41.html#016_openssh2">April 3, 2008:
1.360 tobias 327: sshd(8) could possibly allow hijacking of X11-forwarded connections.</a>
1.357 brad 328: <li><a href="errata41.html#015_openssh">March 30, 2008:
329: sshd(8) could allow arbitrary commands to be executed via ~/.ssh/rc
1.358 brad 330: when a sshd_config(5) ForceCommand directive was in effect.</a>
1.356 henning 331: <li><a href="errata41.html#014_ppp">March 7, 2008:
332: Command prompt parsing buffer overflow in ppp.</a>
1.354 brad 333: <li><a href="errata41.html#012_xorg">Feb 8, 2008:
334: Multiple vulnerabilities in X.Org.</a>
335: <li><a href="errata41.html#011_openssl">Oct 10, 2007:
336: The SSL_get_shared_ciphers() function in OpenSSL contains
337: an off-by-one overflow.</a>
1.350 deraadt 338: <li><a href="errata41.html#010_dhcpd">Oct 9, 2007:
1.349 deraadt 339: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 340: <li><a href="errata41.html#009_file">Jul 9, 2007:
341: Fix possible heap overflow in file(1).</a>
1.346 matthieu 342: <li><a href="errata41.html#005_route6">Apr 27, 2007:
343: IPv6 type 0 route headers can be used to mount a DoS attack
344: against hosts and networks.</a>
345: <li><a href="errata41.html#004_xorg">Apr 27, 2007:
346: Multiple vulnerabilities in X.Org.</a>
347: <li><a href="errata41.html#001_mbuf">Apr 27, 2007:
348: Incorrect mbuf handling for ICMP6 packets.</a>
349: </ul>
350:
351: <li>
1.334 brad 352: <a name="40"></a>
353: <h3><font color="#e00000">OpenBSD 4.0 Security Advisories</font></h3>
354: These are the OpenBSD 4.0 advisories -- all these problems are solved
355: in <a href=anoncvs.html>OpenBSD current</a> and the
356: <a href=stable.html>patch branch</a>.
357:
358: <p>
359: <ul>
1.350 deraadt 360: <li><a href="errata40.html#016_dhcpd">Oct 9, 2007:
1.349 deraadt 361: Fix stack corruption problem in dhcpd(8).</a>
1.347 deraadt 362: <li><a href="errata40.html#015_file">Jul 9, 2007:
363: Fix possible heap overflow in file(1).</a>
1.343 deraadt 364: <li><a href="errata40.html#012_route6">Apr 23, 2007:
365: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 366: against hosts and networks.</a>
1.342 mbalmer 367: <li><a href="errata40.html#011_xorg">Apr 4, 2007:
368: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 369: <li><a href="errata40.html#m_dup1">Mar 7, 2007:
370: Incorrect mbuf handling for ICMP6 packets.</a>
1.339 deraadt 371: <li><a href="errata40.html#agp">Jan 3, 2007:
1.338 miod 372: Insufficient validation in vga(4) may allow an attacker to gain
373: root privileges on some i386 systems.</a>
1.339 deraadt 374: <li><a href="errata40.html#ldso">Nov 19, 2006:
1.337 deraadt 375: ld.so(1) fails to properly sanitize the environment.</a>
1.339 deraadt 376: <li><a href="errata40.html#systrace">Nov 4, 2006:
1.334 brad 377: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
378: found by Chris Evans.</a>
1.339 deraadt 379: <li><a href="errata40.html#openssl">Nov 4, 2006:
1.334 brad 380: Several problems have been found in OpenSSL.</a>
1.339 deraadt 381: <li><a href="errata40.html#httpd">Nov 4, 2006:
1.334 brad 382: httpd(8) does not sanitize the Expect header from an HTTP request
383: when it is reflected back in an error message, which might allow
384: cross-site scripting (XSS) style attacks.</a>
385: </ul>
386:
387: <li>
1.321 brad 388: <a name="39"></a>
389:
390: <h3><font color="#e00000">OpenBSD 3.9 Security Advisories</font></h3>
391: These are the OpenBSD 3.9 advisories -- all these problems are solved
392: in <a href=anoncvs.html>OpenBSD current</a> and the
393: <a href=stable.html>patch branch</a>.
394:
395: <p>
396: <ul>
1.343 deraadt 397: <li><a href="errata39.html#022_route6">Apr 23, 2007:
398: IPv6 type 0 route headers can be used to mount a DoS attack
1.344 deraadt 399: against hosts and networks.</a>
1.342 mbalmer 400: <li><a href="errata39.html#021_xorg">Apr 4, 2007:
401: Multiple vulnerabilities in X.Org.</a>
1.340 deraadt 402: <li><a href="errata39.html#m_dup1">Mar 7, 2007:
403: Incorrect mbuf handling for ICMP6 packets.</a>
1.338 miod 404: <li><a href="errata39.html#agp">Jan 3, 2007:
405: Insufficient validation in vga(4) may allow an attacker to gain
406: root privileges on some i386 systems.</a>
1.336 brad 407: <li><a href="errata39.html#ldso">Nov 19, 2006:
1.337 deraadt 408: ld.so(1) fails to properly sanitize the environment.</a>
1.333 deraadt 409: <li><a href="errata39.html#ssh">Oct 12, 2006:
1.332 brad 410: Fix 2 security bugs found in OpenSSH.</a>
1.333 deraadt 411: <li><a href="errata39.html#systrace">Oct 7, 2006:
1.331 brad 412: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 413: found by Chris Evans.</a>
1.333 deraadt 414: <li><a href="errata39.html#openssl2">Oct 7, 2006:
1.330 brad 415: Several problems have been found in OpenSSL.</a>
1.333 deraadt 416: <li><a href="errata39.html#httpd2">Oct 7, 2006:
1.330 brad 417: httpd(8) does not sanitize the Expect header from an HTTP request
418: when it is reflected back in an error message, which might allow
419: cross-site scripting (XSS) style attacks.</a>
1.333 deraadt 420: <li><a href="errata39.html#openssl">Sep 8, 2006:
1.329 brad 421: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
422: possible for an attacker to construct an invalid signature which
423: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.333 deraadt 424: <li><a href="errata39.html#bind">Sep 8, 2006:
1.328 brad 425: Two Denial of Service issues have been found with BIND.</a>
1.333 deraadt 426: <li><a href="errata39.html#sppp">Sep 2, 2006:
1.327 brad 427: Due to the failure to correctly validate LCP configuration option
428: lengths, it is possible for an attacker to send LCP packets via an
429: sppp(4) connection causing the kernel to panic.</a>
1.333 deraadt 430: <li><a href="errata39.html#isakmpd">Aug 25, 2006:
1.326 brad 431: A problem in isakmpd(8) caused IPsec to run partly without replay
432: protection.</a>
1.333 deraadt 433: <li><a href="errata39.html#sem">Aug 25, 2006:
1.326 brad 434: It is possible to cause the kernel to panic when more than the default
435: number of sempahores have been allocated.</a>
1.333 deraadt 436: <li><a href="errata39.html#dhcpd">Aug 25, 2006:
1.326 brad 437: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
438: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
439: option.</a>
1.333 deraadt 440: <li><a href="errata39.html#sendmail3">Aug 25, 2006:
1.326 brad 441: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 442: <li><a href="errata39.html#httpd">Jul 30, 2006:
1.325 brad 443: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
444: overflow.</a>
1.333 deraadt 445: <li><a href="errata39.html#sendmail2">Jun 15, 2006:
1.324 brad 446: A potential denial of service problem has been found in sendmail.</a>
1.333 deraadt 447: <li><a href="errata39.html#xorg">May 2, 2006:
1.322 brad 448: A buffer overflow exists in the Render extension of the X server.</a>
1.333 deraadt 449: <li><a href="errata39.html#sendmail">Mar 25, 2006:
1.321 brad 450: A race condition has been reported to exist in the handling by sendmail
451: of asynchronous signals.</a>
452: </ul>
453:
454: <li>
1.318 deraadt 455: <a name="38"></a>
456:
457: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
458: These are the OpenBSD 3.8 advisories -- all these problems are solved
459: in <a href=anoncvs.html>OpenBSD current</a> and the
460: <a href=stable.html>patch branch</a>.
461:
462: <p>
463: <ul>
1.332 brad 464: <li><a href="errata38.html#ssh2">Oct 12, 2006:
465: Fix 2 security bugs found in OpenSSH.</a>
1.330 brad 466: <li><a href="errata38.html#systrace">Oct 7, 2006:
1.331 brad 467: Fix for an integer overflow in systrace(4)'s STRIOCREPLACE support,
1.330 brad 468: found by Chris Evans.</a>
469: <li><a href="errata38.html#openssl2">Oct 7, 2006:
470: Several problems have been found in OpenSSL.</a>
471: <li><a href="errata38.html#httpd2">Oct 7, 2006:
472: httpd(8) does not sanitize the Expect header from an HTTP request
473: when it is reflected back in an error message, which might allow
474: cross-site scripting (XSS) style attacks.</a>
1.329 brad 475: <li><a href="errata38.html#openssl">Sep 8, 2006:
476: Due to incorrect PKCS#1 v1.5 padding validation in OpenSSL, it is
477: possible for an attacker to construct an invalid signature which
478: OpenSSL would accept as a valid PKCS#1 v1.5 signature.</a>
1.328 brad 479: <li><a href="errata38.html#bind">Sep 8, 2006:
480: Two Denial of Service issues have been found with BIND.</a>
1.327 brad 481: <li><a href="errata38.html#sppp">Sep 2, 2006:
482: Due to the failure to correctly validate LCP configuration option
483: lengths, it is possible for an attacker to send LCP packets via an
484: sppp(4) connection causing the kernel to panic.</a>
1.326 brad 485: <li><a href="errata38.html#isakmpd">Aug 25, 2006:
486: A problem in isakmpd(8) caused IPsec to run partly without replay
487: protection.</a>
488: <li><a href="errata38.html#sem">Aug 25, 2006:
489: It is possible to cause the kernel to panic when more than the default
490: number of sempahores have been allocated.</a>
491: <li><a href="errata38.html#dhcpd">Aug 25, 2006:
492: Due to an off-by-one error in dhcpd(8) it is possible to cause dhcpd(8)
493: to exit by sending a DHCPDISCOVER packet with a 32-byte client identifier
494: option.</a>
495: <li><a href="errata38.html#sendmail3">Aug 25, 2006:
496: A potential denial of service problem has been found in sendmail.</a>
1.325 brad 497: <li><a href="errata38.html#httpd">Jul 30, 2006:
498: httpd(8)'s mod_rewrite has a potentially exploitable off-by-one buffer
499: overflow.</a>
1.324 brad 500: <li><a href="errata38.html#sendmail2">Jun 15, 2006:
501: A potential denial of service problem has been found in sendmail.</a>
1.322 brad 502: <li><a href="errata38.html#xorg">May 2, 2006:
503: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 504: <li><a href="errata38.html#sendmail">Mar 25, 2006:
505: A race condition has been reported to exist in the handling by sendmail
506: of asynchronous signals.</a>
507: <li><a href="errata38.html#ssh">Feb 12, 2006:
1.320 brad 508: Josh Bressers has reported a weakness in OpenSSH caused due to the
509: insecure use of the system(3) function in scp(1) when performing copy
510: operations using filenames that are supplied by the user from the
511: command line.</a>
1.321 brad 512: <li><a href="errata38.html#fd">Jan 5, 2006:
1.319 brad 513: Do not allow users to trick suid programs into re-opening files via
514: /dev/fd.</a>
1.321 brad 515: <li><a href="errata38.html#perl">Jan 5, 2006:
1.319 brad 516: A buffer overflow has been found in the Perl interpreter with the
517: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 518: </ul>
519:
520: <li>
1.312 david 521: <a name="37"></a>
522:
523: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
524: These are the OpenBSD 3.7 advisories -- all these problems are solved
1.323 steven 525: in <a href="anoncvs.html">OpenBSD current</a>. The
526: <a href="stable.html">patch branch</a> for 3.7 is no longer being maintained,
527: you should update your machine.
1.312 david 528:
529: <p>
530: <ul>
1.322 brad 531: <li><a href="errata37.html#xorg">May 2, 2006:
532: A buffer overflow exists in the Render extension of the X server.</a>
1.321 brad 533: <li><a href="errata37.html#sendmail">Mar 25, 2006:
534: A race condition has been reported to exist in the handling by sendmail
535: of asynchronous signals.</a>
1.320 brad 536: <li><a href="errata37.html#ssh">Feb 12, 2006:
537: Josh Bressers has reported a weakness in OpenSSH caused due to the
538: insecure use of the system(3) function in scp(1) when performing copy
539: operations using filenames that are supplied by the user from the
540: command line.</a>
1.319 brad 541: <li><a href="errata37.html#fd">Jan 5, 2006:
542: Do not allow users to trick suid programs into re-opening files via
543: /dev/fd.</a>
544: <li><a href="errata37.html#perl">Jan 5, 2006:
545: A buffer overflow has been found in the Perl interpreter with the
546: sprintf function which may be exploitable under certain conditions.</a>
1.318 deraadt 547: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 548: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 549: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 550: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 deraadt 551: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 552: Fix a race condition in sudo(8) that could allow a user
1.315 millert 553: to run arbitrary commands.</a>
1.318 deraadt 554: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 555: Fix a buffer overflow, memory leaks, and NULL pointer
556: dereference in cvs(1).</a>
1.312 david 557: </ul>
558:
559: <li>
1.301 miod 560: <a name="36"></a>
561:
562: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
563: These are the OpenBSD 3.6 advisories -- all these problems are solved
1.323 steven 564: in <a href="anoncvs.html">OpenBSD current</a>. The
565: <a href="stable.html">patch branch</a> for 3.6 is no longer being maintained,
566: you should update your machine.
1.301 miod 567:
568: <p>
1.302 markus 569: <ul>
1.317 millert 570: <li><a href="errata36.html#libz2">Jul 21, 2005:
571: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 572: <li><a href="errata36.html#libz">Jul 6, 2005:
573: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 574: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 575: Fix a race condition in sudo(8) that could allow a user
1.315 millert 576: to run arbitrary commands.</a>
1.311 deraadt 577: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 578: Fix a buffer overflow, memory leaks, and NULL pointer
579: dereference in cvs(1).</a>
1.311 deraadt 580: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 581: Due to buffer overflows in telnet(1), a malicious
582: server or man-in-the-middle attack could allow
583: execution of arbitrary code with the privileges of
584: the user invoking telnet(1).</a>
1.311 deraadt 585: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 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#locore">Feb 28, 2005:
1.306 brad 589: More stringent checking should be done in the copy(9)
590: functions to prevent their misuse.</a>
1.311 deraadt 591: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 592: httpd(8)'s mod_include module fails to properly validate
593: the length of user supplied tag strings prior to copying
1.305 brad 594: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 595: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 596: On systems running isakmpd(8) it is possible for a local
597: user to cause kernel memory corruption and system panic by
1.303 markus 598: setting ipsec(4) credentials on a socket.</a>
1.302 markus 599: </ul>
1.301 miod 600:
601: <li>
1.288 matthieu 602: <a name="35"></a>
1.279 deraadt 603:
1.294 david 604: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 605: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 606: in <a href="anoncvs.html">OpenBSD current</a>. The
607: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
608: you should update your machine.
1.279 deraadt 609:
610: <p>
611: <ul>
1.310 brad 612: <li><a href="errata35.html#cvs4">Apr 28, 2005:
613: Fix a buffer overflow, memory leaks, and NULL pointer
614: dereference in cvs(1).</a>
1.309 brad 615: <li><a href="errata35.html#telnet">Mar 30, 2005:
616: Due to buffer overflows in telnet(1), a malicious
617: server or man-in-the-middle attack could allow
618: execution of arbitrary code with the privileges of
619: the user invoking telnet(1).</a>
1.308 brad 620: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 621: More stringent checking should be done in the copy(9)
622: functions to prevent their misuse.</a>
1.306 brad 623: <li><a href="errata35.html#locore">Feb 28, 2005:
624: More stringent checking should be done in the copy(9)
625: functions to prevent their misuse.</a>
1.304 brad 626: <li><a href="errata35.html#httpd3">Jan 12, 2005:
627: httpd(8)'s mod_include module fails to properly validate
628: the length of user supplied tag strings prior to copying
1.305 brad 629: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 630: <li><a href="errata35.html#pfkey">Dec 14, 2004:
631: On systems running isakmpd(8) it is possible for a local
632: user to cause kernel memory corruption and system panic by
1.303 markus 633: setting ipsec(4) credentials on a socket.</a>
1.301 miod 634: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 635: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 636: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 637: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 638: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 639: httpd(8)'s mod_rewrite module can be made to write one zero byte in
640: an arbitrary memory position outside of a char array, causing a DoS
641: or possibly buffer overflows.</a>
1.301 miod 642: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 643: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 644: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 645: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 646: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 647: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 648: Multiple remote vulnerabilities have been found in the cvs(1)
649: server which can be used by CVS clients to crash or execute
1.293 brad 650: arbitrary code on the server.</a>
1.301 miod 651: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 652: kdc(8) performs inadequate checking of request fields, leading
653: to the possibility of principal impersonation from other
654: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 655: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 656: xdm(1) ignores the requestPort resource and creates a
1.293 brad 657: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 658: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 659: A buffer overflow in the cvs(1) server has been found,
660: which can be used by CVS clients to execute arbitrary code on
1.293 brad 661: the server.</a>
1.301 miod 662: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 663: Integer overflow problems were found in procfs, allowing
1.293 brad 664: reading of arbitrary kernel memory.</a>
1.301 miod 665: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 666: Pathname validation problems have been found in cvs(1),
667: allowing clients and servers access to files outside the
1.293 brad 668: repository or local CVS tree.</a>
1.279 deraadt 669: </ul>
670:
671: <p>
672: <li>
1.288 matthieu 673: <a name="34"></a>
1.261 david 674:
1.294 david 675: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 676: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 677: in <a href="anoncvs.html">OpenBSD current</a>. The
678: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
679: you should update your machine.
1.261 david 680: <p>
681: <ul>
1.302 markus 682: <li><a href="errata34.html#pfkey">Dec 14, 2004:
683: On systems running isakmpd(8) it is possible for a local
684: user to cause kernel memory corruption and system panic by
1.303 markus 685: setting ipsec(4) credentials on a socket.</a>
1.298 brad 686: <li><a href="errata34.html#xpm">Sep 16, 2004:
687: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 688: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
689: httpd(8)'s mod_rewrite module can be made to write one zero byte in
690: an arbitrary memory position outside of a char array, causing a DoS
691: or possibly buffer overflows.</a>
1.294 david 692: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 693: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 694: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 695: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 696: an attacker can delete IPsec tunnels at will.</a>
1.294 david 697: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 698: Multiple remote vulnerabilities have been found in the cvs(1)
699: server which can be used by CVS clients to crash or execute
1.293 brad 700: arbitrary code on the server.</a>
1.294 david 701: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 702: kdc(8) performs inadequate checking of request fields, leading
703: to the possibility of principal impersonation from other
704: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 705: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 706: A buffer overflow in the cvs(1) server has been found,
707: which can be used by CVS clients to execute arbitrary code on
708: the server.</a>
1.294 david 709: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 710: Integer overflow problems were found in procfs, allowing
711: reading of arbitrary kernel memory.</a>
1.294 david 712: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 713: Pathname validation problems have been found in cvs(1),
714: allowing clients and servers access to files outside the
715: repository or local CVS tree.</a>
1.294 david 716: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 717: A missing check for a NULL-pointer dereference may allow a
1.281 otto 718: remote attacker to crash applications using OpenSSL.</a>
1.294 david 719: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 720: Defects in the payload validation and processing functions of
721: isakmpd have been discovered. An attacker could send malformed
722: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 723: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 724: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
725: access module, using IP addresses without a netmask on big endian
726: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 727: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 728: An IPv6 MTU handling problem exists that could be used by an
729: attacker to cause a denial of service attack.</a>
1.294 david 730: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 731: A reference counting bug in shmat(2) could be used to write to
732: kernel memory under certain circumstances.</a>
1.294 david 733: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 734: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 735: by Thomas Walpuski.</a>
1.294 david 736: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 737: It may be possible for a local user to overrun the stack in
738: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 739: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 740: The use of certain ASN.1 encodings or malformed public keys may
741: allow an attacker to mount a denial of service attack against
742: applications linked with ssl(3).</a>
1.261 david 743: </ul>
744:
745: <li>
1.288 matthieu 746: <a name="33"></a>
1.246 deraadt 747:
1.294 david 748: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 749: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 750: in <a href="anoncvs.html">OpenBSD current</a>. The
751: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 752: you should update your machine.
1.246 deraadt 753: <p>
754: <ul>
1.294 david 755: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 756: Pathname validation problems have been found in cvs(1),
757: allowing clients and servers access to files outside the
758: repository or local CVS tree.</a>
1.294 david 759: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 760: A missing check for a NULL-pointer dereference may allow a
1.281 otto 761: remote attacker to crash applications using OpenSSL.</a>
1.294 david 762: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 763: Defects in the payload validation and processing functions of
764: isakmpd have been discovered. An attacker could send malformed
765: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 766: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 767: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
768: access module, using IP addresses without a netmask on big endian
769: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 770: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 771: An IPv6 MTU handling problem exists that could be used by an
772: attacker to cause a denial of service attack.</a>
1.294 david 773: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 774: A reference counting bug in shmat(2) could be used to write to
775: kernel memory under certain circumstances.</a>
1.294 david 776: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 777: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 778: by Thomas Walpuski.</a>
1.294 david 779: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 780: It may be possible for a local user to execute arbitrary code
781: resulting in escalation of privileges due to a stack overrun
782: in compat_ibcs2(8).</a>
1.294 david 783: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 784: The use of certain ASN.1 encodings or malformed public keys may
785: allow an attacker to mount a denial of service attack against
786: applications linked with ssl(3).</a>
1.294 david 787: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 788: Access of freed memory in pf(4) could be used to
1.260 margarid 789: remotely panic a machine using scrub rules.</a>
1.294 david 790: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 791: A buffer overflow in the address parsing in
792: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 793: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 794: OpenSSH versions prior to 3.7 contains a buffer management error
795: that is potentially exploitable.</a>
1.294 david 796: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 797: Root may be able to reduce the security level by taking advantage of
798: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 799: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 800: An improper bounds check in the kernel may allow a local user
801: to panic the kernel.</a>
1.294 david 802: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 803: An off-by-one error exists in the C library function realpath(3)
804: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 805: </ul>
806:
1.265 miod 807:
1.247 david 808: <p>
1.246 deraadt 809: <li>
1.288 matthieu 810: <a name="32"></a>
1.224 deraadt 811:
1.294 david 812: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 813: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 814: in <a href="anoncvs.html">OpenBSD current</a>. The
815: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 816: you should update your machine.
1.224 deraadt 817: <p>
818: <ul>
1.294 david 819: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 820: The use of certain ASN.1 encodings or malformed public keys may
821: allow an attacker to mount a denial of service attack against
822: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 823: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 824: Access of freed memory in pf(4) could be used to
1.260 margarid 825: remotely panic a machine using scrub rules.</a>
1.294 david 826: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 827: A buffer overflow in the address parsing in
828: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 829: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 830: OpenSSH versions prior to 3.7 contains a buffer management error
831: that is potentially exploitable.</a>
1.294 david 832: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 833: Fix for a potential security issue in
834: sendmail(8) with respect to DNS maps.</a>
1.294 david 835: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 836: An off-by-one error exists in the C library function realpath(3)
837: may allow an attacker to gain escalated privileges.</a>
1.294 david 838: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 839: A buffer overflow in the address parsing in
840: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 841: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 842: A cryptographic weaknesses in the Kerberos v4 protocol can be
843: exploited on Kerberos v5 as well.</a>
1.294 david 844: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 845: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 846: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 847: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 848: Various SSL and TLS operations in OpenSSL are vulnerable to
849: timing attacks.</a>
1.294 david 850: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 851: A buffer overflow in lprm(1) may allow an attacker to elevate
852: privileges to user daemon.</a>.
1.294 david 853: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 854: A buffer overflow in the envelope comments processing in
855: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 856: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 857: httpd(8) leaks file inode numbers via ETag header as well as
858: child PIDs in multipart MIME boundary generation. This could
859: lead, for example, to NFS exploitation because it uses inode
860: numbers as part of the file handle.</a>
1.294 david 861: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 862: In ssl(8) an information leak can occur via timing by performing
863: a MAC computation even if incorrect block cipher padding has
864: been found, this is a countermeasure. Also, check for negative
865: sizes, in allocation routines.</a>
1.294 david 866: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 867: A double free exists in cvs(1) that could lead to privilege
868: escalation for cvs configurations where the cvs command is
1.233 margarid 869: run as a privileged user.</a>
1.294 david 870: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 871: A buffer overflow exists in named(8) that could lead to a
872: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 873: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 874: A logic error in the pool kernel memory allocator could cause
875: memory corruption in low-memory situations, causing the system
876: to crash.</a>
1.294 david 877: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 878: An attacker can bypass smrsh(8)'s restrictions and execute
879: arbitrary commands with the privileges of his own account.</a>
1.294 david 880: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 881: Network bridges running pf with scrubbing enabled could cause
882: mbuf corruption, causing the system to crash.</a>
1.294 david 883: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 884: A buffer overflow can occur in the kadmind(8) daemon, leading
885: to possible remote crash or exploit.</a>
1.224 deraadt 886: </ul>
887:
1.227 miod 888: <p>
889: <li>
1.288 matthieu 890: <a name="31"></a>
1.203 deraadt 891:
1.294 david 892: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 893: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 894: in <a href="anoncvs.html">OpenBSD current</a>. The
895: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 896: you should update your machine.
1.203 deraadt 897:
898: <p>
899: <ul>
1.294 david 900: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 901: A buffer overflow in the address parsing in
902: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 903: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 904: A cryptographic weaknesses in the Kerberos v4 protocol can be
905: exploited on Kerberos v5 as well.</a>
1.294 david 906: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 907: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 908: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 909: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 910: Various SSL and TLS operations in OpenSSL are vulnerable to
911: timing attacks.</a>
1.294 david 912: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 913: A buffer overflow in lprm(1) may allow an attacker to gain
914: root privileges.</a>
1.294 david 915: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 916: A buffer overflow in the envelope comments processing in
917: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 918: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 919: In ssl(8) an information leak can occur via timing by performing
920: a MAC computation even if incorrect block cipher padding has
921: been found, this is a countermeasure. Also, check for negative
922: sizes, in allocation routines.</a>
1.294 david 923: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 924: A double free exists in cvs(1) that could lead to privilege
925: escalation for cvs configurations where the cvs command is
1.294 david 926: run as a privileged user</a>.
927: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 928: A buffer overflow exists in named(8) that could lead to a
929: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 930: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 931: Incorrect argument checking in the getitimer(2) system call
932: may allow an attacker to crash the system.</a>
1.294 david 933: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 934: An attacker can bypass smrsh(8)'s restrictions and execute
935: arbitrary commands with the privileges of his own account.</a>
1.294 david 936: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 937: A buffer overflow can occur in the kadmind(8) daemon, leading
938: to possible remote crash or exploit.</a>
1.294 david 939: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 940: Incorrect argument checking in the setitimer(2) system call
941: may allow an attacker to write to kernel memory.</a>
1.294 david 942: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 943: An insufficient boundary check in the select system call
1.220 miod 944: allows an attacker to overwrite kernel memory and execute arbitrary code
945: in kernel context.</a>
1.294 david 946: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 947: Several remote buffer overflows can occur in the SSL2 server and SSL3
948: client of the ssl(8) library, as in the ASN.1 parser code in the
949: crypto(3) library, all of them being potentially remotely
950: exploitable.</a>
1.294 david 951: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 952: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
953: possible remote crash.</a>
1.294 david 954: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 955: A race condition exists in the pppd(8) daemon which may cause it to
956: alter the file permissions of an arbitrary file.</a>
1.294 david 957: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 958: Receiving IKE payloads out of sequence can cause isakmpd(8) to
959: crash.</a>
1.294 david 960: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 961: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 962: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 963: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 964: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 965: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 966: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 967: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 968: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 969: input validation error that can result in an integer overflow and
970: privilege escalation.</a>
1.294 david 971: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 972: A buffer overflow can occur during the interpretation of chunked
973: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 974: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 975: Under certain conditions, on systems using YP with netgroups
976: in the password database, it is possible that sshd(8) does
977: ACL checks for the requested user name but uses the password
978: database entry of a different user for authentication. This
979: means that denied users might authenticate successfully
980: while permitted users could be locked out.</a>
1.294 david 981: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 982: A race condition exists that could defeat the kernel's
983: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 984: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 985: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 986: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 987: A local user can gain super-user privileges due to a buffer
988: overflow in sshd(8) if AFS has been configured on the system
989: or if KerberosTgtPassing or AFSTokenPassing has been enabled
990: in the sshd_config file.</a>
1.203 deraadt 991: </ul>
992:
1.235 miod 993: <p>
1.203 deraadt 994: <li>
1.288 matthieu 995: <a name="30"></a>
1.187 deraadt 996:
1.294 david 997: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 998: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 999: in <a href="anoncvs.html">OpenBSD current</a>. The
1000: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 1001: you should update your machine.
1.187 deraadt 1002:
1003: <p>
1004: <ul>
1.294 david 1005: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 1006: A buffer overflow exists in named(8) that could lead to a
1007: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 1008: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 1009: Incorrect argument checking in the getitimer(2) system call
1010: may allow an attacker to crash the system.</a>
1.294 david 1011: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 1012: An attacker can bypass smrsh(8)'s restrictions and execute
1013: arbitrary commands with the privileges of his own account.</a>
1.294 david 1014: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 1015: A buffer overflow can occur in the kadmind(8) daemon, leading
1016: to possible remote crash or exploit.</a>
1.294 david 1017: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 1018: Incorrect argument checking in the setitimer(2) system call
1019: may allow an attacker to write to kernel memory.</a>
1.294 david 1020: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 1021: An insufficient boundary check in the select and poll system calls
1022: allows an attacker to overwrite kernel memory and execute arbitrary code
1023: in kernel context.</a>
1.294 david 1024: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 1025: Several remote buffer overflows can occur in the SSL2 server and SSL3
1026: client of the ssl(8) library, as in the ASN.1 parser code in the
1027: crypto(3) library, all of them being potentially remotely
1028: exploitable.</a>
1.294 david 1029: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 1030: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
1031: possible remote crash.</a>
1.294 david 1032: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 1033: A race condition exists in the pppd(8) daemon which may cause it to
1034: alter the file permissions of an arbitrary file.</a>
1.294 david 1035: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 1036: Receiving IKE payloads out of sequence can cause isakmpd(8) to
1037: crash.</a>
1.294 david 1038: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 1039: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 1040: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 1041: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1042: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 1043: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 1044: input validation error that can result in an integer overflow and
1045: privilege escalation.</a>
1.294 david 1046: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 1047: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 1048: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 1049: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 1050: A buffer overflow can occur during the interpretation of chunked
1051: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 1052: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 1053: A race condition exists that could defeat the kernel's
1054: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1055: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 1056: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1057: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 1058: A local user can gain super-user privileges due to a buffer
1059: overflow in sshd(8) if AFS has been configured on the system
1060: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1061: in the sshd_config file.</a>
1.294 david 1062: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 1063: The mail(1) was interpreting tilde escapes even when invoked
1064: in non-interactive mode. As mail(1) is called as root from cron,
1065: this can lead to a local root compromise.</a>
1.294 david 1066: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 1067: Under certain conditions, on systems using YP with netgroups in
1068: the password database, it is possible for the rexecd(8) and rshd(8)
1069: daemons to execute a shell from a password database entry for a
1070: different user. Similarly, atrun(8) may change to the wrong
1071: home directory when running jobs.</a>
1.294 david 1072: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 1073: A potential double free() exists in the zlib library;
1074: this is not exploitable on OpenBSD.
1075: The kernel also contains a copy of zlib; it is not
1076: currently known if the kernel zlib is exploitable.</a>
1.294 david 1077: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 1078: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1079: may allow a local user to gain super-user privileges.</a>
1.294 david 1080: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 1081: A race condition between the ptrace(2) and execve(2) system calls
1082: allows an attacker to modify the memory contents of suid/sgid
1083: processes which could lead to compromise of the super-user account.</a>
1.294 david 1084: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 1085: There is a security hole in sudo(8) that can be exploited
1086: when the Postfix sendmail replacement is installed that may
1087: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1088: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 1089: An attacker can trick a machine running the lpd daemon into
1090: creating new files in the root directory from a machine with
1091: remote line printer access.</a>
1.294 david 1092: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 1093: The vi.recover script can be abused in such a way as
1094: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1095: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 1096: pf(4) was incapable of dealing with certain ipv6 icmp packets,
1097: resulting in a crash.</a>
1.294 david 1098: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 1099: A security hole that may allow an attacker to partially authenticate
1100: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 1101: </ul>
1102:
1103: <p>
1104: <li>
1.288 matthieu 1105: <a name="29"></a>
1.173 deraadt 1106:
1.294 david 1107: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 1108: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 1109: in <a href="anoncvs.html">OpenBSD current</a>. The
1110: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 1111: you should update your machine.
1112:
1.173 deraadt 1113:
1114: <p>
1115: <ul>
1.294 david 1116: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 1117: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 1118: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 1119: A race condition exists that could defeat the kernel's
1120: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 1121: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 1122: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 1123: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 1124: A local user can gain super-user privileges due to a buffer
1125: overflow in sshd(8) if AFS has been configured on the system
1126: or if KerberosTgtPassing or AFSTokenPassing has been enabled
1127: in the sshd_config file.</a>
1.294 david 1128: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 1129: The mail(1) was interpreting tilde escapes even when invoked
1130: in non-interactive mode. As mail(1) is called as root from cron,
1131: this can lead to a local root compromise.</a>
1.294 david 1132: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 1133: A potential double free() exists in the zlib library;
1134: this is not exploitable on OpenBSD.
1135: The kernel also contains a copy of zlib; it is not
1136: currently known if the kernel zlib is exploitable.</a>
1.294 david 1137: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 1138: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 1139: may allow a local user to gain super-user privileges.</a>
1.294 david 1140: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 1141: A race condition between the ptrace(2) and execve(2) system calls
1142: allows an attacker to modify the memory contents of suid/sgid
1143: processes which could lead to compromise of the super-user account.</a>
1.294 david 1144: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 1145: There is a security hole in sudo(8) that can be exploited
1146: when the Postfix sendmail replacement is installed that may
1147: allow an attacker on the local host to gain root privileges.</a>
1.294 david 1148: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 1149: An attacker can trick a machine running the lpd daemon into
1150: creating new files in the root directory from a machine with
1151: remote line printer access.</a>
1.294 david 1152: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 1153: The vi.recover script can be abused in such a way as
1154: to cause arbitrary zero-length files to be removed.</a>
1.294 david 1155: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 1156: A security hole exists in uuxqt(8) that may allow an
1157: attacker to gain root privileges.</a>
1.294 david 1158: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 1159: A security hole exists in lpd(8) that may allow an
1160: attacker to gain root privileges if lpd is running.</a>
1.294 david 1161: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 1162: A security hole exists in sendmail(8) that may allow an
1163: attacker on the local host to gain root privileges.</a>
1.294 david 1164: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 1165: A kernel buffer overflow in the NFS code can be used to execute
1166: arbitrary code by users with mount privileges (only root by
1.181 millert 1167: default).</a>
1.294 david 1168: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 1169: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1170: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 1171: sshd(8) allows users to delete arbitrary files named "cookies"
1172: if X11 forwarding is enabled. X11 forwarding is disabled
1173: by default.</a>
1.294 david 1174: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 1175: Programs using the fts routines can be tricked into changing
1176: into the wrong directory.</a>
1.294 david 1177: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 1178: Sendmail signal handlers contain unsafe code,
1179: leading to numerous race conditions.</a>
1.173 deraadt 1180: </ul>
1181:
1182: <p>
1183: <li>
1.288 matthieu 1184: <a name="28"></a>
1.152 deraadt 1185:
1.294 david 1186: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 1187: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 1188: in <a href="anoncvs.html">OpenBSD current</a>. The
1189: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 1190: you should update your machine.
1191:
1.152 deraadt 1192:
1193: <p>
1194: <ul>
1.294 david 1195: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 1196: A security hole exists in uuxqt(8) that may allow an
1197: attacker to gain root privileges.</a>
1.294 david 1198: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 1199: A security hole exists in lpd(8) that may allow an
1200: attacker to gain root privileges if lpd is running.</a>
1.294 david 1201: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 1202: A security hole exists in sendmail(8) that may allow an
1203: attacker on the local host to gain root privileges.</a>
1.294 david 1204: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 1205: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 1206: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 1207: Programs using the fts routines can be tricked into changing
1208: into the wrong directory.</a>
1.294 david 1209: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 1210: Sendmail signal handlers contain unsafe code,
1211: leading to numerous race conditions.</a>
1.294 david 1212: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 1213: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 1214: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 1215: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 1216: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 1217: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 1218: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 1219: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1220: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 1221: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 1222: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 1223: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 1224: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 1225: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 1226: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 1227: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 1228: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 1229: rnd(4) did not use all of its input when written to.</a>
1.294 david 1230: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 1231: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 1232: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 1233: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 1234: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 1235: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 1236: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 1237: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 1238: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 1239: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 1240: </ul>
1241:
1242: <p>
1243: <li>
1.288 matthieu 1244: <a name="27"></a>
1.124 deraadt 1245:
1.294 david 1246: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 1247: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 1248: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 1249: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
1250:
1251: <p>
1252: <ul>
1.294 david 1253: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 1254: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 1255: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 1256: a buffer overflow was fixed in sudo(8).</a>
1.294 david 1257: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 1258: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 1259: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 1260: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
1261: (patch included)</a>
1.294 david 1262: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 1263: X11 libraries have 2 potential overflows in xtrans code.
1264: (patch included)</a>
1.294 david 1265: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 1266: Apache mod_rewrite and mod_vhost_alias modules could expose files
1267: on the server in certain configurations if used.
1268: (patch included)</a>
1.294 david 1269: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 1270: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
1271: TERMPATH and TERMCAP environment variables as it should.
1272: (patch included)</a>
1.294 david 1273: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 1274: There are printf-style format string bugs in several privileged
1275: programs. (patch included)</a>
1.294 david 1276: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 1277: libcurses honored terminal descriptions in the $HOME/.terminfo
1278: directory as well as in the TERMCAP environment variable for
1279: setuid and setgid applications.
1.146 deraadt 1280: (patch included)</a>
1.294 david 1281: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 1282: A format string vulnerability exists in talkd(8).
1283: (patch included)</a>
1.294 david 1284: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 1285: A format string vulnerability exists in the pw_error() function of the
1286: libutil library, yielding localhost root through chpass(1).
1287: (patch included)</a>
1.294 david 1288: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 1289: Bad ESP/AH packets could cause a crash under certain conditions.
1290: (patch included)</a>
1.294 david 1291: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 1292: A format string vulnerability (localhost root) exists in xlock(1).
1293: (patch included)</a>
1.294 david 1294: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1295: Various bugs found in X11 libraries have various side effects, almost
1296: completely denial of service in OpenBSD.
1297: (patch included)</a>
1.294 david 1298: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1299: Just like pretty much all the other unix ftp daemons
1300: on the planet, ftpd had a remote root hole in it.
1301: Luckily, ftpd was not enabled by default.
1.137 deraadt 1302: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1303: (patch included)</a>
1.294 david 1304: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1305: Mopd, very rarely used, contained some buffer overflows.
1306: (patch included)</a>
1.294 david 1307: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1308: libedit would check for a <b>.editrc</b> file in the current
1309: directory. Not known to be a real security issue, but a patch
1310: is available anyways.
1311: (patch included)</a>
1.294 david 1312: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1313: A serious bug in dhclient(8) could allow strings from a
1314: malicious dhcp server to be executed in the shell as root.
1315: (patch included)</a>
1.294 david 1316: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1317: A serious bug in isakmpd(8) policy handling wherein
1318: policy verification could be completely bypassed in isakmpd.
1319: (patch included)</a>
1.294 david 1320: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1321: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1322: should not be used, and results in security problems on
1323: other operating systems.</a>
1.294 david 1324: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1325: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1326: (patch included)</a>
1.294 david 1327: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1328: Improper use of ipf <i>keep-state</i> rules can result
1329: in firewall rules being bypassed. (patch included)</a>
1330:
1.124 deraadt 1331: </ul>
1332:
1333: <p>
1334: <li>
1.288 matthieu 1335: <a name="26"></a>
1.119 deraadt 1336:
1.294 david 1337: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1338: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1339: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1340: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1341:
1342: <p>
1343: <ul>
1.294 david 1344: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1345: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1346: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1347: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1348: Improper use of ipf <i>keep-state</i> rules can result
1349: in firewall rules being bypassed. (patch included)</a>
1.294 david 1350: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1351: xlockmore has a bug which a localhost attacker can use to gain
1352: access to the encrypted root password hash (which is normally
1.245 miod 1353: encoded using blowfish</a> (see
1.294 david 1354: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1355: crypt(3)</a>)
1.245 miod 1356: (patch included).
1.294 david 1357: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1358: Systems running with procfs enabled and mounted are
1359: vulnerable to a very tricky exploit. procfs is not
1360: mounted by default.
1361: (patch included).</a>
1.294 david 1362: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1363: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1364: thus exposing the system to a race where the aliases file
1365: did not exist.
1.119 deraadt 1366: (patch included).</a>
1.294 david 1367: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1368: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1369: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1370: A buffer overflow in the RSAREF code included in the
1371: USA version of libssl, is possibly exploitable in
1372: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1373: (patch included).<br></a>
1374: <strong>Update:</strong> Turns out that this was not exploitable
1375: in any of the software included in OpenBSD 2.6.
1.294 david 1376: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1377: Any user could change interface media configurations, resulting in
1378: a localhost denial of service attack.
1.121 deraadt 1379: (patch included).</a>
1.119 deraadt 1380: </ul>
1381:
1382: <p>
1383: <li>
1.288 matthieu 1384: <a name="25"></a>
1.106 deraadt 1385:
1.294 david 1386: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1387: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1388: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1389: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1390:
1.96 deraadt 1391: <p>
1.104 deraadt 1392: <ul>
1.294 david 1393: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1394: In cron(8), make sure argv[] is NULL terminated in the
1395: fake popen() and run sendmail as the user, not as root.
1396: (patch included).</a>
1.294 david 1397: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1398: filesystems had an overrun in their handling of uio_offset
1399: in their readdir() routines. (These filesystems are not
1400: enabled by default). (patch included).</a>
1.294 david 1401: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1402: when we execve() a new process. (patch included).</a>
1.294 david 1403: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1404: been handled by IPsec may be transmitted as cleartext.
1405: PF_KEY SA expirations may leak kernel resources.
1406: (patch included).</a>
1.294 david 1407: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1408: motd re-writing and change the find(1) to use -execdir
1409: (patch included).</a>
1.294 david 1410: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1411: users to chflags(2) or fchflags(2) on character or block devices
1412: which they may currently be the owner of (patch included).</a>
1.294 david 1413: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1414: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1415: </ul>
1416:
1.106 deraadt 1417: <p>
1418: <li>
1.288 matthieu 1419: <a name="24"></a>
1.235 miod 1420:
1.294 david 1421: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1422: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1423: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1424: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1425:
1.96 deraadt 1426: <p>
1.75 deraadt 1427: <ul>
1.294 david 1428: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1429: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1430: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1431: another kernel crash case caused by the <strong>crashme</strong>
1432: program (patch included).</a>
1.294 david 1433: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1434: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1435: (patch included).</a>
1.294 david 1436: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1437: existed in ping(8). (patch included).</a>
1.294 david 1438: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1439: the ipq, which could permit an attacker to cause a crash.
1440: (patch included).</a>
1.294 david 1441: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1442: kernel between accept(2) and select(2) could permit an attacker
1443: to hang sockets from remote.
1444: (patch included).</a>
1.294 david 1445: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1446: bog the machine excessively and cause problems.
1447: (patch included).</a>
1.294 david 1448: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1449: DDB interacted to possibly cause a crash.
1450: (patch included).</a>
1.294 david 1451: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1452: (patch included).</a>
1.294 david 1453: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1454: problem in bootpd(8). (patch included).</a>
1.294 david 1455: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1456: exploitable problem relating to environment variables in termcap
1457: and curses. (patch included).</a>
1.294 david 1458: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1459: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1460: </ul>
1461:
1.106 deraadt 1462: <p>
1463: <li>
1.288 matthieu 1464: <a name="23"></a>
1.235 miod 1465:
1.294 david 1466: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1467: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1468: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1469: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1470:
1.96 deraadt 1471: <p>
1.53 matthieu 1472: <ul>
1.294 david 1473: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1474: problem in bootpd(8). (patch included).</a>
1.294 david 1475: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1476: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1477: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1478: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1479: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1480: chpass(1) has a file descriptor leak which allows an
1481: attacker to modify /etc/master.passwd.</a>
1.294 david 1482: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1483: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1484: should not be executed with fd slots 0, 1, or 2 free.
1485: (patch included).</a>
1.294 david 1486: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1487: libraries (patches included).</a>
1.294 david 1488: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1489: processes too permissive (4th revision patch included).</a>
1.294 david 1490: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1491: of immutable and append-only file flags. (patch included).</a>
1.294 david 1492: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1493: if IPSEC is enabled (patch included).</a>
1.294 david 1494: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1495: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1496: </ul>
1.9 deraadt 1497:
1.106 deraadt 1498: <p>
1499: <li>
1.288 matthieu 1500: <a name="22"></a>
1.235 miod 1501:
1.294 david 1502: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1503: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1504: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1505: still exist in other operating systems. (The supplied patches are for
1506: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1507:
1.96 deraadt 1508: <p>
1.9 deraadt 1509: <ul>
1.294 david 1510: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1511: packets if IPSEC is enabled (patch included).</a>
1.294 david 1512: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1513: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1514: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1515: (patch included).</a>
1.294 david 1516: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1517: (patch included).</a>
1.294 david 1518: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1519: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1520: (patch included).</a>
1.294 david 1521: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1522: export (patch included).</a>
1.112 philen 1523: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1524: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1525: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1526: Acceptance.</a>
1.294 david 1527: A patch is available <a href="errata22.html#sourceroute">here</a>.
1528: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1529: flaw (patch included).</a>
1.294 david 1530: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1531: </ul>
1532:
1.106 deraadt 1533: <p>
1534: <li>
1.288 matthieu 1535: <a name="21"></a>
1.235 miod 1536:
1.294 david 1537: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1538: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1539: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1540: exist in other operating systems. (If you are running OpenBSD 2.1, we
1541: would strongly recommend an upgrade to the newest release, as this
1542: patch list only attempts at fixing the most important security
1543: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1544: security problems. Many of those problems were solved in ways which
1545: make it hard for us to provide patches).
1546:
1.96 deraadt 1547: <p>
1.52 deraadt 1548: <ul>
1.112 philen 1549: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1550: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1551: (patch included)</a>
1.112 philen 1552: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1553: </ul>
1.51 deraadt 1554:
1.106 deraadt 1555: <p>
1556: <li>
1.288 matthieu 1557: <a name="20"></a>
1.235 miod 1558:
1.294 david 1559: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1560: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1561: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1562: exist in other operating systems. (If you are running OpenBSD 2.0, we
1563: commend you for being there back in the old days!, but you're really
1564: missing out if you don't install a new version!)
1565:
1566: <p>
1567: <ul>
1.112 philen 1568: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1569: resolver (patch included)</a>
1570: <li>Many others... if people can hunt them down, please let me know
1571: and we'll put them up here.
1572: </ul>
1.51 deraadt 1573: <p>
1.106 deraadt 1574:
1.288 matthieu 1575: <a name="watching"></a>
1.294 david 1576: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1577:
1.21 deraadt 1578: Since we take a proactive stance with security, we are continually
1579: finding and fixing new security problems. Not all of these problems
1.80 espie 1580: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1581: confirmed to be exploitable; many simple bugs we fix do turn out to
1582: have security consequences we could not predict. We do not have the
1583: time resources to make these changes available in the above format.<p>
1.21 deraadt 1584:
1585: Thus there are usually minor security fixes in the current source code
1586: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1587: guarantee that these problems are of minimal impact and unproven
1.44 ian 1588: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1589: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1590:
1.45 deraadt 1591: People who are really concerned with security can do a number of
1592: things:<p>
1.21 deraadt 1593:
1594: <ul>
1595: <li>If you understand security issues, watch our
1.294 david 1596: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1597: eye out for things which appear security related. Since
1.21 deraadt 1598: exploitability is not proven for many of the fixes we make,
1599: do not expect the relevant commit message to say "SECURITY FIX!".
1600: If a problem is proven and serious, a patch will be available
1601: here very shortly after.
1.161 horacio 1602: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1603: security-announce mailing list</a> which will notify you for every
1.186 ian 1604: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1605: and instruct you on how to patch the problem.
1.21 deraadt 1606: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1607: complete system build from time to time (read /usr/src/Makefile
1608: carefully). Users can make the assumption that the current
1609: source tree always has stronger security than the previous release.
1.45 deraadt 1610: However, building your own system from source code is not trivial;
1.265 miod 1611: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1612: transition between major releases.
1.115 ericj 1613: <li>Install a binary snapshot for your
1.80 espie 1614: architecture, which are made available fairly often. For
1.29 deraadt 1615: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1616: </ul>
1617:
1.9 deraadt 1618: <p>
1.288 matthieu 1619: <a name="reporting"></a>
1.294 david 1620: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1621:
1.5 deraadt 1622: <p> If you find a new security problem, you can mail it to
1.294 david 1623: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1624: <br>
1.5 deraadt 1625: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1626: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1627:
1.107 deraadt 1628: <p>
1.288 matthieu 1629: <a name="papers"></a>
1.294 david 1630: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1631:
1632: A number of papers have been written by OpenBSD team members, about security
1633: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1634: documents are available as follows.<p>
1.107 deraadt 1635:
1636: <ul>
1.113 deraadt 1637: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1638: <a href="events.html#usenix99">Usenix 1999</a>,
1639: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1640: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1641: <a href="papers/bcrypt-paper.ps">paper</a> and
1642: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1643: <p>
1644: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1645: <a href="events.html#usenix99">Usenix 1999</a>,
1646: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1647: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1648: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1649: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1650: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1651: <a href="papers/crypt-paper.ps">paper</a> and
1652: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1653: <p>
1654: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1655: <a href="events.html#usenix99">Usenix 1999</a>,
1656: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1657: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1658: <a href="papers/strlcpy-paper.ps">paper</a> and
1659: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1660: <p>
1.118 deraadt 1661: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1662: <a href="events.html#lisa99">LISA 1999</a>,
1663: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1664: <a href="papers/authgw-paper.ps">paper</a> and
1665: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1666: <p>
1.153 jufi 1667: <li>Encrypting Virtual Memory<br>
1.294 david 1668: <a href="events.html#sec2000">Usenix Security 2000</a>,
1669: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1670: <a href="papers/swapencrypt.ps">paper</a> and
1671: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1672: <p>
1.107 deraadt 1673: </ul>
1.294 david 1674: </ul>
1.106 deraadt 1675:
1.2 deraadt 1676: <hr>
1.294 david 1677: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1678: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1679: <br>
1.367 ! brad 1680: <small>$OpenBSD: security.html,v 1.366 2008/10/31 18:58:58 miod Exp $</small>
1.1 deraadt 1681:
1.24 deraadt 1682: </body>
1683: </html>