Annotation of www/security.html, Revision 1.318
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1.210 jsyn 16: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
1.106 deraadt 17: <p>
1.294 david 18: <h2><font color="#e00000">Security</font></h2>
19: <hr>
1.1 deraadt 20:
1.114 philen 21: <table width="100%">
22: <tr>
23: <td colspan="2">
24: <strong>Index</strong>
25: </td>
26: </tr>
27: <tr>
28: <td valign="top">
1.294 david 29: <a href="#goals">Security goals of the Project</a>.<br>
30: <a href="#disclosure">Full Disclosure policy</a>.<br>
31: <a href="#process">Source code auditing process</a>.<br>
32: <a href="#default">"Secure by Default"</a>.<br>
33: <a href="#crypto">Use of Cryptography</a>.<br>
34: <p>
35: <a href="#watching">Watching changes</a>.<br>
36: <a href="#reporting">Reporting security issues</a>.<br>
37: <a href="#papers">Further Reading</a><br>
1.106 deraadt 38: <p>
1.114 philen 39: </td>
40: <td valign="top">
1.225 deraadt 41: For security advisories for specific releases, click below:<br>
42: <a href="#20">2.0</a>,
43: <a href="#21">2.1</a>,
44: <a href="#22">2.2</a>,
45: <a href="#23">2.3</a>,
46: <a href="#24">2.4</a>,
47: <a href="#25">2.5</a>,
48: <a href="#26">2.6</a>,
49: <a href="#27">2.7</a>,
50: <a href="#28">2.8</a>,
51: <a href="#29">2.9</a>,
52: <a href="#30">3.0</a>,
53: <a href="#31">3.1</a>,
1.246 deraadt 54: <a href="#32">3.2</a>,
1.261 david 55: <a href="#33">3.3</a>,
1.280 david 56: <a href="#34">3.4</a>,
1.301 miod 57: <a href="#35">3.5</a>,
1.312 david 58: <a href="#36">3.6</a>,
1.318 ! deraadt 59: <a href="#37">3.7</a>,
! 60: <a href="#38">3.8</a>.
1.114 philen 61: </td>
62: </tr>
63: </table>
1.56 deraadt 64: <hr>
65:
1.294 david 66: <a name="goals"></a>
1.278 deraadt 67: <ul>
1.294 david 68: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 69:
1.14 deraadt 70: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 71: ONE in the industry for security (if we are not already there). Our
72: open software development model permits us to take a more
73: uncompromising view towards increased security than Sun, SGI, IBM, HP,
74: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 75: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 76: cryptography</a>, we are able to take cryptographic approaches towards
77: fixing security problems.<p>
1.18 deraadt 78:
1.288 matthieu 79: <a name="disclosure"></a>
1.294 david 80: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 81:
1.45 deraadt 82: Like many readers of the
1.196 jufi 83: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 84: BUGTRAQ mailing list</a>,
1.106 deraadt 85: we believe in full disclosure of security problems. In the
86: operating system arena, we were probably the first to embrace
87: the concept. Many vendors, even of free software, still try
88: to hide issues from their users.<p>
89:
90: Security information moves very fast in cracker circles. On the other
91: hand, our experience is that coding and releasing of proper security
92: fixes typically requires about an hour of work -- very fast fix
93: turnaround is possible. Thus we think that full disclosure helps the
94: people who really care about security.<p>
95:
1.288 matthieu 96: <a name="process"></a>
1.294 david 97: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 98:
1.12 deraadt 99: Our security auditing team typically has between six and twelve
1.45 deraadt 100: members who continue to search for and fix new security holes. We
101: have been auditing since the summer of 1996. The process we follow to
102: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 103: every critical software component. We are not so much looking for
104: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 105: years later someone discovers the problem used to be a security
1.106 deraadt 106: issue, and we fixed it because it was just a bug, well, all the
107: better. Flaws have been found in just about every area of the system.
108: Entire new classes of security problems have been found during our
109: audit, and often source code which had been audited earlier needs
110: re-auditing with these new flaws in mind. Code often gets audited
111: multiple times, and by multiple people with different auditing
112: skills.<p>
1.12 deraadt 113:
1.94 deraadt 114: Some members of our security auditing team worked for Secure Networks,
115: the company that made the industry's premier network security scanning
116: software package Ballista (Secure Networks got purchased by Network
117: Associates, Ballista got renamed to Cybercop Scanner, and well...)
118: That company did a lot of security research, and thus fit in well
1.106 deraadt 119: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
120: colours since day 1.<p>
1.31 deraadt 121:
1.34 deraadt 122: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 123: In most cases we have found that the determination of exploitability
124: is not an issue. During our ongoing auditing process we find many
125: bugs, and endeavor to fix them even though exploitability is not
126: proven. We fix the bug, and we move on to find other bugs to fix. We
127: have fixed many simple and obvious careless programming errors in code
128: and only months later discovered that the problems were in fact
129: exploitable. (Or, more likely someone on
1.197 jufi 130: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 131: would report that other operating systems were vulnerable to a `newly
132: discovered problem', and then it would be discovered that OpenBSD had
133: been fixed in a previous release). In other cases we have been saved
134: from full exploitability of complex step-by-step attacks because we
135: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 136: managed such a success is the lpd advisory that Secure Networks put out.
137: <p>
1.29 deraadt 138:
1.288 matthieu 139: <a name="newtech"></a>
1.294 david 140: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 141:
142: As we audit source code, we often invent new ways of solving problems.
143: Sometimes these ideas have been used before in some random application
144: written somewhere, but perhaps not taken to the degree that we do.
145: <p>
146:
147: <ul>
148: <li>strlcpy() and strlcat()
149: <li>Memory protection purify
150: <ul>
151: <li>W^X
152: <li>.rodata segment
153: <li>Guard pages
154: <li>Randomized malloc()
155: <li>Randomized mmap()
156: <li>atexit() and stdio protection
157: </ul>
1.295 otto 158: <li>Privilege separation
1.278 deraadt 159: <li>Privilege revocation
160: <li>Chroot jailing
161: <li>New uids
162: <li>ProPolice
163: <li>... and others
164: </ul>
165: <p>
166:
1.294 david 167: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 168:
1.45 deraadt 169: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 170: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 171: commonplace in security forums like
1.197 jufi 172: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 173:
1.45 deraadt 174: The most intense part of our security auditing happened immediately
1.80 espie 175: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 176: over the last third of 1996 and first half of 1997. Thousands (yes,
177: thousands) of security issues were fixed rapidly over this year-long
178: period; bugs like the standard buffer overflows, protocol
179: implementation weaknesses, information gathering, and filesystem
180: races. Hence most of the security problems that we encountered were
181: fixed before our 2.1 release, and then a far smaller number needed
182: fixing for our 2.2 release. We do not find as many problems anymore,
183: it is simply a case of diminishing returns. Recently the security
184: problems we find and fix tend to be significantly more obscure or
185: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 186:
1.35 deraadt 187: <ul>
1.45 deraadt 188: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 189: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 190: to search for more complicated exploits, so we will too.
191: <li>Finding and fixing subtle flaws in complicated software is
192: a lot of fun.
1.35 deraadt 193: </ul>
1.106 deraadt 194: <p>
1.15 deraadt 195:
1.14 deraadt 196: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 197: to find and fix new security flaws.<p>
1.12 deraadt 198:
1.288 matthieu 199: <a name="default"></a>
1.294 david 200: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 201:
202: To ensure that novice users of OpenBSD do not need to become security
203: experts overnight (a viewpoint which other vendors seem to have), we
204: ship the operating system in a Secure by Default mode. All non-essential
205: services are disabled. As the user/administrator becomes more familiar
206: with the system, he will discover that he has to enable daemons and other
207: parts of the system. During the process of learning how to enable a new
208: service, the novice is more likely to learn of security considerations.<p>
209:
210: This is in stark contrast to the increasing number of systems that
211: ship with NFS, mountd, web servers, and various other services enabled
212: by default, creating instantaneous security problems for their users
213: within minutes after their first install.<p>
214:
1.288 matthieu 215: <a name="crypto"></a>
1.294 david 216: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 217:
218: And of course, since the OpenBSD project is based in Canada, it is possible
219: for us to integrate cryptography. For more information, read the page
1.116 deraadt 220: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 221:
1.294 david 222: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 223:
224: <li>
1.318 ! deraadt 225: <a name="38"></a>
! 226:
! 227: <h3><font color="#e00000">OpenBSD 3.8 Security Advisories</font></h3>
! 228: These are the OpenBSD 3.8 advisories -- all these problems are solved
! 229: in <a href=anoncvs.html>OpenBSD current</a> and the
! 230: <a href=stable.html>patch branch</a>.
! 231:
! 232: <p>
! 233: <ul>
! 234: <li>None yet.
! 235: </ul>
! 236:
! 237: <li>
1.312 david 238: <a name="37"></a>
239:
240: <h3><font color="#e00000">OpenBSD 3.7 Security Advisories</font></h3>
241: These are the OpenBSD 3.7 advisories -- all these problems are solved
242: in <a href=anoncvs.html>OpenBSD current</a> and the
243: <a href=stable.html>patch branch</a>.
244:
245: <p>
246: <ul>
1.318 ! deraadt 247: <li><a href="errata37.html#libz2">Jul 21, 2005:
1.317 millert 248: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.318 ! deraadt 249: <li><a href="errata37.html#libz">Jul 6, 2005:
1.316 millert 250: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.318 ! deraadt 251: <li><a href="errata37.html#sudo">Jun 20, 2005:
1.316 millert 252: Fix a race condition in sudo(8) that could allow a user
1.315 millert 253: to run arbitrary commands.</a>
1.318 ! deraadt 254: <li><a href="errata37.html#cvs">Jun 7, 2005:
1.313 brad 255: Fix a buffer overflow, memory leaks, and NULL pointer
256: dereference in cvs(1).</a>
1.312 david 257: </ul>
258:
259: <li>
1.301 miod 260: <a name="36"></a>
261:
262: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
263: These are the OpenBSD 3.6 advisories -- all these problems are solved
264: in <a href=anoncvs.html>OpenBSD current</a> and the
265: <a href=stable.html>patch branch</a>.
266:
267: <p>
1.302 markus 268: <ul>
1.317 millert 269: <li><a href="errata36.html#libz2">Jul 21, 2005:
270: Fix another buffer overflow in the zlib library that may be exploitable.</a>
1.316 millert 271: <li><a href="errata36.html#libz">Jul 6, 2005:
272: Fix a buffer overflow in the zlib library that may be exploitable.</a>
1.315 millert 273: <li><a href="errata36.html#sudo">Jun 20, 2005:
1.316 millert 274: Fix a race condition in sudo(8) that could allow a user
1.315 millert 275: to run arbitrary commands.</a>
1.311 deraadt 276: <li><a href="errata36.html#cvs">Apr 28, 2005:
1.310 brad 277: Fix a buffer overflow, memory leaks, and NULL pointer
278: dereference in cvs(1).</a>
1.311 deraadt 279: <li><a href="errata36.html#telnet">Mar 30, 2005:
1.309 brad 280: Due to buffer overflows in telnet(1), a malicious
281: server or man-in-the-middle attack could allow
282: execution of arbitrary code with the privileges of
283: the user invoking telnet(1).</a>
1.311 deraadt 284: <li><a href="errata36.html#copy">Mar 16, 2005:
1.307 brad 285: More stringent checking should be done in the copy(9)
286: functions to prevent their misuse.</a>
1.311 deraadt 287: <li><a href="errata36.html#locore">Feb 28, 2005:
1.306 brad 288: More stringent checking should be done in the copy(9)
289: functions to prevent their misuse.</a>
1.311 deraadt 290: <li><a href="errata36.html#httpd">Jan 12, 2005:
1.304 brad 291: httpd(8)'s mod_include module fails to properly validate
292: the length of user supplied tag strings prior to copying
1.305 brad 293: them to a local buffer, causing a buffer overflow.</a>
1.311 deraadt 294: <li><a href="errata36.html#pfkey">Dec 14, 2004:
1.302 markus 295: On systems running isakmpd(8) it is possible for a local
296: user to cause kernel memory corruption and system panic by
1.303 markus 297: setting ipsec(4) credentials on a socket.</a>
1.302 markus 298: </ul>
1.301 miod 299:
300: <p>
1.314 miod 301: OpenBSD 3.5 and earlier releases are not supported anymore. The following
302: paragraphs only list advisories issued while they were maintained; these
303: releases are likely to be affected by the advisories for more recent releases.
304: <br>
305:
1.301 miod 306: <li>
1.288 matthieu 307: <a name="35"></a>
1.279 deraadt 308:
1.294 david 309: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 310: These are the OpenBSD 3.5 advisories -- all these problems are solved
1.314 miod 311: in <a href="anoncvs.html">OpenBSD current</a>. The
312: <a href="stable.html">patch branch</a> for 3.5 is no longer being maintained,
313: you should update your machine.
1.279 deraadt 314:
315: <p>
316: <ul>
1.310 brad 317: <li><a href="errata35.html#cvs4">Apr 28, 2005:
318: Fix a buffer overflow, memory leaks, and NULL pointer
319: dereference in cvs(1).</a>
1.309 brad 320: <li><a href="errata35.html#telnet">Mar 30, 2005:
321: Due to buffer overflows in telnet(1), a malicious
322: server or man-in-the-middle attack could allow
323: execution of arbitrary code with the privileges of
324: the user invoking telnet(1).</a>
1.308 brad 325: <li><a href="errata35.html#copy">Mar 16, 2005:
1.307 brad 326: More stringent checking should be done in the copy(9)
327: functions to prevent their misuse.</a>
1.306 brad 328: <li><a href="errata35.html#locore">Feb 28, 2005:
329: More stringent checking should be done in the copy(9)
330: functions to prevent their misuse.</a>
1.304 brad 331: <li><a href="errata35.html#httpd3">Jan 12, 2005:
332: httpd(8)'s mod_include module fails to properly validate
333: the length of user supplied tag strings prior to copying
1.305 brad 334: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 335: <li><a href="errata35.html#pfkey">Dec 14, 2004:
336: On systems running isakmpd(8) it is possible for a local
337: user to cause kernel memory corruption and system panic by
1.303 markus 338: setting ipsec(4) credentials on a socket.</a>
1.301 miod 339: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 340: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 341: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 342: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 343: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 344: httpd(8)'s mod_rewrite module can be made to write one zero byte in
345: an arbitrary memory position outside of a char array, causing a DoS
346: or possibly buffer overflows.</a>
1.301 miod 347: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 348: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 349: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 350: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 351: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 352: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 353: Multiple remote vulnerabilities have been found in the cvs(1)
354: server which can be used by CVS clients to crash or execute
1.293 brad 355: arbitrary code on the server.</a>
1.301 miod 356: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 357: kdc(8) performs inadequate checking of request fields, leading
358: to the possibility of principal impersonation from other
359: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 360: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 361: xdm(1) ignores the requestPort resource and creates a
1.293 brad 362: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 363: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 364: A buffer overflow in the cvs(1) server has been found,
365: which can be used by CVS clients to execute arbitrary code on
1.293 brad 366: the server.</a>
1.301 miod 367: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 368: Integer overflow problems were found in procfs, allowing
1.293 brad 369: reading of arbitrary kernel memory.</a>
1.301 miod 370: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 371: Pathname validation problems have been found in cvs(1),
372: allowing clients and servers access to files outside the
1.293 brad 373: repository or local CVS tree.</a>
1.279 deraadt 374: </ul>
375:
376: <p>
377: <li>
1.288 matthieu 378: <a name="34"></a>
1.261 david 379:
1.294 david 380: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 381: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 382: in <a href="anoncvs.html">OpenBSD current</a>. The
383: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
384: you should update your machine.
1.261 david 385: <p>
386: <ul>
1.302 markus 387: <li><a href="errata34.html#pfkey">Dec 14, 2004:
388: On systems running isakmpd(8) it is possible for a local
389: user to cause kernel memory corruption and system panic by
1.303 markus 390: setting ipsec(4) credentials on a socket.</a>
1.298 brad 391: <li><a href="errata34.html#xpm">Sep 16, 2004:
392: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 393: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
394: httpd(8)'s mod_rewrite module can be made to write one zero byte in
395: an arbitrary memory position outside of a char array, causing a DoS
396: or possibly buffer overflows.</a>
1.294 david 397: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 398: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 399: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 400: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 401: an attacker can delete IPsec tunnels at will.</a>
1.294 david 402: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 403: Multiple remote vulnerabilities have been found in the cvs(1)
404: server which can be used by CVS clients to crash or execute
1.293 brad 405: arbitrary code on the server.</a>
1.294 david 406: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 407: kdc(8) performs inadequate checking of request fields, leading
408: to the possibility of principal impersonation from other
409: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 410: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 411: A buffer overflow in the cvs(1) server has been found,
412: which can be used by CVS clients to execute arbitrary code on
413: the server.</a>
1.294 david 414: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 415: Integer overflow problems were found in procfs, allowing
416: reading of arbitrary kernel memory.</a>
1.294 david 417: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 418: Pathname validation problems have been found in cvs(1),
419: allowing clients and servers access to files outside the
420: repository or local CVS tree.</a>
1.294 david 421: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 422: A missing check for a NULL-pointer dereference may allow a
1.281 otto 423: remote attacker to crash applications using OpenSSL.</a>
1.294 david 424: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 425: Defects in the payload validation and processing functions of
426: isakmpd have been discovered. An attacker could send malformed
427: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 428: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 429: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
430: access module, using IP addresses without a netmask on big endian
431: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 432: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 433: An IPv6 MTU handling problem exists that could be used by an
434: attacker to cause a denial of service attack.</a>
1.294 david 435: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 436: A reference counting bug in shmat(2) could be used to write to
437: kernel memory under certain circumstances.</a>
1.294 david 438: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 439: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 440: by Thomas Walpuski.</a>
1.294 david 441: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 442: It may be possible for a local user to overrun the stack in
443: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 444: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 445: The use of certain ASN.1 encodings or malformed public keys may
446: allow an attacker to mount a denial of service attack against
447: applications linked with ssl(3).</a>
1.261 david 448: </ul>
449:
450: <li>
1.288 matthieu 451: <a name="33"></a>
1.246 deraadt 452:
1.294 david 453: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 454: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 455: in <a href="anoncvs.html">OpenBSD current</a>. The
456: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 457: you should update your machine.
1.246 deraadt 458: <p>
459: <ul>
1.294 david 460: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 461: Pathname validation problems have been found in cvs(1),
462: allowing clients and servers access to files outside the
463: repository or local CVS tree.</a>
1.294 david 464: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 465: A missing check for a NULL-pointer dereference may allow a
1.281 otto 466: remote attacker to crash applications using OpenSSL.</a>
1.294 david 467: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 468: Defects in the payload validation and processing functions of
469: isakmpd have been discovered. An attacker could send malformed
470: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 471: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 472: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
473: access module, using IP addresses without a netmask on big endian
474: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 475: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 476: An IPv6 MTU handling problem exists that could be used by an
477: attacker to cause a denial of service attack.</a>
1.294 david 478: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 479: A reference counting bug in shmat(2) could be used to write to
480: kernel memory under certain circumstances.</a>
1.294 david 481: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 482: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 483: by Thomas Walpuski.</a>
1.294 david 484: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 485: It may be possible for a local user to execute arbitrary code
486: resulting in escalation of privileges due to a stack overrun
487: in compat_ibcs2(8).</a>
1.294 david 488: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 489: The use of certain ASN.1 encodings or malformed public keys may
490: allow an attacker to mount a denial of service attack against
491: applications linked with ssl(3).</a>
1.294 david 492: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 493: Access of freed memory in pf(4) could be used to
1.260 margarid 494: remotely panic a machine using scrub rules.</a>
1.294 david 495: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 496: A buffer overflow in the address parsing in
497: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 498: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 499: OpenSSH versions prior to 3.7 contains a buffer management error
500: that is potentially exploitable.</a>
1.294 david 501: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 502: Root may be able to reduce the security level by taking advantage of
503: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 504: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 505: An improper bounds check in the kernel may allow a local user
506: to panic the kernel.</a>
1.294 david 507: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 508: An off-by-one error exists in the C library function realpath(3)
509: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 510: </ul>
511:
1.265 miod 512:
1.247 david 513: <p>
1.246 deraadt 514: <li>
1.288 matthieu 515: <a name="32"></a>
1.224 deraadt 516:
1.294 david 517: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 518: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 519: in <a href="anoncvs.html">OpenBSD current</a>. The
520: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 521: you should update your machine.
1.224 deraadt 522: <p>
523: <ul>
1.294 david 524: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 525: The use of certain ASN.1 encodings or malformed public keys may
526: allow an attacker to mount a denial of service attack against
527: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 528: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 529: Access of freed memory in pf(4) could be used to
1.260 margarid 530: remotely panic a machine using scrub rules.</a>
1.294 david 531: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 532: A buffer overflow in the address parsing in
533: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 534: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 535: OpenSSH versions prior to 3.7 contains a buffer management error
536: that is potentially exploitable.</a>
1.294 david 537: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 538: Fix for a potential security issue in
539: sendmail(8) with respect to DNS maps.</a>
1.294 david 540: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 541: An off-by-one error exists in the C library function realpath(3)
542: may allow an attacker to gain escalated privileges.</a>
1.294 david 543: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 544: A buffer overflow in the address parsing in
545: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 546: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 547: A cryptographic weaknesses in the Kerberos v4 protocol can be
548: exploited on Kerberos v5 as well.</a>
1.294 david 549: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 550: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 551: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 552: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 553: Various SSL and TLS operations in OpenSSL are vulnerable to
554: timing attacks.</a>
1.294 david 555: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 556: A buffer overflow in lprm(1) may allow an attacker to elevate
557: privileges to user daemon.</a>.
1.294 david 558: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 559: A buffer overflow in the envelope comments processing in
560: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 561: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 562: httpd(8) leaks file inode numbers via ETag header as well as
563: child PIDs in multipart MIME boundary generation. This could
564: lead, for example, to NFS exploitation because it uses inode
565: numbers as part of the file handle.</a>
1.294 david 566: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 567: In ssl(8) an information leak can occur via timing by performing
568: a MAC computation even if incorrect block cipher padding has
569: been found, this is a countermeasure. Also, check for negative
570: sizes, in allocation routines.</a>
1.294 david 571: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 572: A double free exists in cvs(1) that could lead to privilege
573: escalation for cvs configurations where the cvs command is
1.233 margarid 574: run as a privileged user.</a>
1.294 david 575: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 576: A buffer overflow exists in named(8) that could lead to a
577: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 578: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 579: A logic error in the pool kernel memory allocator could cause
580: memory corruption in low-memory situations, causing the system
581: to crash.</a>
1.294 david 582: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 583: An attacker can bypass smrsh(8)'s restrictions and execute
584: arbitrary commands with the privileges of his own account.</a>
1.294 david 585: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 586: Network bridges running pf with scrubbing enabled could cause
587: mbuf corruption, causing the system to crash.</a>
1.294 david 588: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 589: A buffer overflow can occur in the kadmind(8) daemon, leading
590: to possible remote crash or exploit.</a>
1.224 deraadt 591: </ul>
592:
1.227 miod 593: <p>
594: <li>
1.288 matthieu 595: <a name="31"></a>
1.203 deraadt 596:
1.294 david 597: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 598: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 599: in <a href="anoncvs.html">OpenBSD current</a>. The
600: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 601: you should update your machine.
1.203 deraadt 602:
603: <p>
604: <ul>
1.294 david 605: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 606: A buffer overflow in the address parsing in
607: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 608: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 609: A cryptographic weaknesses in the Kerberos v4 protocol can be
610: exploited on Kerberos v5 as well.</a>
1.294 david 611: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 612: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 613: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 614: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 615: Various SSL and TLS operations in OpenSSL are vulnerable to
616: timing attacks.</a>
1.294 david 617: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 618: A buffer overflow in lprm(1) may allow an attacker to gain
619: root privileges.</a>
1.294 david 620: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 621: A buffer overflow in the envelope comments processing in
622: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 623: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 624: In ssl(8) an information leak can occur via timing by performing
625: a MAC computation even if incorrect block cipher padding has
626: been found, this is a countermeasure. Also, check for negative
627: sizes, in allocation routines.</a>
1.294 david 628: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 629: A double free exists in cvs(1) that could lead to privilege
630: escalation for cvs configurations where the cvs command is
1.294 david 631: run as a privileged user</a>.
632: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 633: A buffer overflow exists in named(8) that could lead to a
634: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 635: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 636: Incorrect argument checking in the getitimer(2) system call
637: may allow an attacker to crash the system.</a>
1.294 david 638: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 639: An attacker can bypass smrsh(8)'s restrictions and execute
640: arbitrary commands with the privileges of his own account.</a>
1.294 david 641: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 642: A buffer overflow can occur in the kadmind(8) daemon, leading
643: to possible remote crash or exploit.</a>
1.294 david 644: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 645: Incorrect argument checking in the setitimer(2) system call
646: may allow an attacker to write to kernel memory.</a>
1.294 david 647: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 648: An insufficient boundary check in the select system call
1.220 miod 649: allows an attacker to overwrite kernel memory and execute arbitrary code
650: in kernel context.</a>
1.294 david 651: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 652: Several remote buffer overflows can occur in the SSL2 server and SSL3
653: client of the ssl(8) library, as in the ASN.1 parser code in the
654: crypto(3) library, all of them being potentially remotely
655: exploitable.</a>
1.294 david 656: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 657: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
658: possible remote crash.</a>
1.294 david 659: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 660: A race condition exists in the pppd(8) daemon which may cause it to
661: alter the file permissions of an arbitrary file.</a>
1.294 david 662: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 663: Receiving IKE payloads out of sequence can cause isakmpd(8) to
664: crash.</a>
1.294 david 665: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 666: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 667: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 668: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 669: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 670: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 671: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 672: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 673: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 674: input validation error that can result in an integer overflow and
675: privilege escalation.</a>
1.294 david 676: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 677: A buffer overflow can occur during the interpretation of chunked
678: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 679: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 680: Under certain conditions, on systems using YP with netgroups
681: in the password database, it is possible that sshd(8) does
682: ACL checks for the requested user name but uses the password
683: database entry of a different user for authentication. This
684: means that denied users might authenticate successfully
685: while permitted users could be locked out.</a>
1.294 david 686: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 687: A race condition exists that could defeat the kernel's
688: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 689: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 690: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 691: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 692: A local user can gain super-user privileges due to a buffer
693: overflow in sshd(8) if AFS has been configured on the system
694: or if KerberosTgtPassing or AFSTokenPassing has been enabled
695: in the sshd_config file.</a>
1.203 deraadt 696: </ul>
697:
1.235 miod 698: <p>
1.203 deraadt 699: <li>
1.288 matthieu 700: <a name="30"></a>
1.187 deraadt 701:
1.294 david 702: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 703: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 704: in <a href="anoncvs.html">OpenBSD current</a>. The
705: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 706: you should update your machine.
1.187 deraadt 707:
708: <p>
709: <ul>
1.294 david 710: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 711: A buffer overflow exists in named(8) that could lead to a
712: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 713: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 714: Incorrect argument checking in the getitimer(2) system call
715: may allow an attacker to crash the system.</a>
1.294 david 716: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 717: An attacker can bypass smrsh(8)'s restrictions and execute
718: arbitrary commands with the privileges of his own account.</a>
1.294 david 719: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 720: A buffer overflow can occur in the kadmind(8) daemon, leading
721: to possible remote crash or exploit.</a>
1.294 david 722: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 723: Incorrect argument checking in the setitimer(2) system call
724: may allow an attacker to write to kernel memory.</a>
1.294 david 725: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 726: An insufficient boundary check in the select and poll system calls
727: allows an attacker to overwrite kernel memory and execute arbitrary code
728: in kernel context.</a>
1.294 david 729: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 730: Several remote buffer overflows can occur in the SSL2 server and SSL3
731: client of the ssl(8) library, as in the ASN.1 parser code in the
732: crypto(3) library, all of them being potentially remotely
733: exploitable.</a>
1.294 david 734: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 735: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
736: possible remote crash.</a>
1.294 david 737: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 738: A race condition exists in the pppd(8) daemon which may cause it to
739: alter the file permissions of an arbitrary file.</a>
1.294 david 740: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 741: Receiving IKE payloads out of sequence can cause isakmpd(8) to
742: crash.</a>
1.294 david 743: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 744: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 745: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 746: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 747: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 748: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 749: input validation error that can result in an integer overflow and
750: privilege escalation.</a>
1.294 david 751: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 752: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 753: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 754: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 755: A buffer overflow can occur during the interpretation of chunked
756: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 757: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 758: A race condition exists that could defeat the kernel's
759: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 760: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 761: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 762: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 763: A local user can gain super-user privileges due to a buffer
764: overflow in sshd(8) if AFS has been configured on the system
765: or if KerberosTgtPassing or AFSTokenPassing has been enabled
766: in the sshd_config file.</a>
1.294 david 767: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 768: The mail(1) was interpreting tilde escapes even when invoked
769: in non-interactive mode. As mail(1) is called as root from cron,
770: this can lead to a local root compromise.</a>
1.294 david 771: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 772: Under certain conditions, on systems using YP with netgroups in
773: the password database, it is possible for the rexecd(8) and rshd(8)
774: daemons to execute a shell from a password database entry for a
775: different user. Similarly, atrun(8) may change to the wrong
776: home directory when running jobs.</a>
1.294 david 777: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 778: A potential double free() exists in the zlib library;
779: this is not exploitable on OpenBSD.
780: The kernel also contains a copy of zlib; it is not
781: currently known if the kernel zlib is exploitable.</a>
1.294 david 782: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 783: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 784: may allow a local user to gain super-user privileges.</a>
1.294 david 785: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 786: A race condition between the ptrace(2) and execve(2) system calls
787: allows an attacker to modify the memory contents of suid/sgid
788: processes which could lead to compromise of the super-user account.</a>
1.294 david 789: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 790: There is a security hole in sudo(8) that can be exploited
791: when the Postfix sendmail replacement is installed that may
792: allow an attacker on the local host to gain root privileges.</a>
1.294 david 793: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 794: An attacker can trick a machine running the lpd daemon into
795: creating new files in the root directory from a machine with
796: remote line printer access.</a>
1.294 david 797: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 798: The vi.recover script can be abused in such a way as
799: to cause arbitrary zero-length files to be removed.</a>
1.294 david 800: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 801: pf(4) was incapable of dealing with certain ipv6 icmp packets,
802: resulting in a crash.</a>
1.294 david 803: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 804: A security hole that may allow an attacker to partially authenticate
805: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 806: </ul>
807:
808: <p>
809: <li>
1.288 matthieu 810: <a name="29"></a>
1.173 deraadt 811:
1.294 david 812: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 813: These are the OpenBSD 2.9 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 2.9 is no longer being maintained,
1.258 beck 816: you should update your machine.
817:
1.173 deraadt 818:
819: <p>
820: <ul>
1.294 david 821: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 822: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 823: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 824: A race condition exists that could defeat the kernel's
825: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 826: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 827: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 828: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 829: A local user can gain super-user privileges due to a buffer
830: overflow in sshd(8) if AFS has been configured on the system
831: or if KerberosTgtPassing or AFSTokenPassing has been enabled
832: in the sshd_config file.</a>
1.294 david 833: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 834: The mail(1) was interpreting tilde escapes even when invoked
835: in non-interactive mode. As mail(1) is called as root from cron,
836: this can lead to a local root compromise.</a>
1.294 david 837: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 838: A potential double free() exists in the zlib library;
839: this is not exploitable on OpenBSD.
840: The kernel also contains a copy of zlib; it is not
841: currently known if the kernel zlib is exploitable.</a>
1.294 david 842: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 843: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 844: may allow a local user to gain super-user privileges.</a>
1.294 david 845: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 846: A race condition between the ptrace(2) and execve(2) system calls
847: allows an attacker to modify the memory contents of suid/sgid
848: processes which could lead to compromise of the super-user account.</a>
1.294 david 849: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 850: There is a security hole in sudo(8) that can be exploited
851: when the Postfix sendmail replacement is installed that may
852: allow an attacker on the local host to gain root privileges.</a>
1.294 david 853: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 854: An attacker can trick a machine running the lpd daemon into
855: creating new files in the root directory from a machine with
856: remote line printer access.</a>
1.294 david 857: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 858: The vi.recover script can be abused in such a way as
859: to cause arbitrary zero-length files to be removed.</a>
1.294 david 860: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 861: A security hole exists in uuxqt(8) that may allow an
862: attacker to gain root privileges.</a>
1.294 david 863: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 864: A security hole exists in lpd(8) that may allow an
865: attacker to gain root privileges if lpd is running.</a>
1.294 david 866: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 867: A security hole exists in sendmail(8) that may allow an
868: attacker on the local host to gain root privileges.</a>
1.294 david 869: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 870: A kernel buffer overflow in the NFS code can be used to execute
871: arbitrary code by users with mount privileges (only root by
1.181 millert 872: default).</a>
1.294 david 873: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 874: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 875: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 876: sshd(8) allows users to delete arbitrary files named "cookies"
877: if X11 forwarding is enabled. X11 forwarding is disabled
878: by default.</a>
1.294 david 879: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 880: Programs using the fts routines can be tricked into changing
881: into the wrong directory.</a>
1.294 david 882: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 883: Sendmail signal handlers contain unsafe code,
884: leading to numerous race conditions.</a>
1.173 deraadt 885: </ul>
886:
887: <p>
888: <li>
1.288 matthieu 889: <a name="28"></a>
1.152 deraadt 890:
1.294 david 891: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 892: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 893: in <a href="anoncvs.html">OpenBSD current</a>. The
894: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 895: you should update your machine.
896:
1.152 deraadt 897:
898: <p>
899: <ul>
1.294 david 900: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 901: A security hole exists in uuxqt(8) that may allow an
902: attacker to gain root privileges.</a>
1.294 david 903: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 904: A security hole exists in lpd(8) that may allow an
905: attacker to gain root privileges if lpd is running.</a>
1.294 david 906: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 907: A security hole exists in sendmail(8) that may allow an
908: attacker on the local host to gain root privileges.</a>
1.294 david 909: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 910: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 911: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 912: Programs using the fts routines can be tricked into changing
913: into the wrong directory.</a>
1.294 david 914: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 915: Sendmail signal handlers contain unsafe code,
916: leading to numerous race conditions.</a>
1.294 david 917: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 918: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 919: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 920: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 921: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 922: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 923: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 924: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 925: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 926: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 927: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 928: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 929: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 930: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 931: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 932: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 933: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 934: rnd(4) did not use all of its input when written to.</a>
1.294 david 935: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 936: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 937: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 938: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 939: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 940: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 941: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 942: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 943: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 944: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 945: </ul>
946:
947: <p>
948: <li>
1.288 matthieu 949: <a name="27"></a>
1.124 deraadt 950:
1.294 david 951: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 952: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 953: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 954: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
955:
956: <p>
957: <ul>
1.294 david 958: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 959: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 960: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 961: a buffer overflow was fixed in sudo(8).</a>
1.294 david 962: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 963: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 964: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 965: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
966: (patch included)</a>
1.294 david 967: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 968: X11 libraries have 2 potential overflows in xtrans code.
969: (patch included)</a>
1.294 david 970: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 971: Apache mod_rewrite and mod_vhost_alias modules could expose files
972: on the server in certain configurations if used.
973: (patch included)</a>
1.294 david 974: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 975: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
976: TERMPATH and TERMCAP environment variables as it should.
977: (patch included)</a>
1.294 david 978: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 979: There are printf-style format string bugs in several privileged
980: programs. (patch included)</a>
1.294 david 981: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 982: libcurses honored terminal descriptions in the $HOME/.terminfo
983: directory as well as in the TERMCAP environment variable for
984: setuid and setgid applications.
1.146 deraadt 985: (patch included)</a>
1.294 david 986: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 987: A format string vulnerability exists in talkd(8).
988: (patch included)</a>
1.294 david 989: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 990: A format string vulnerability exists in the pw_error() function of the
991: libutil library, yielding localhost root through chpass(1).
992: (patch included)</a>
1.294 david 993: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 994: Bad ESP/AH packets could cause a crash under certain conditions.
995: (patch included)</a>
1.294 david 996: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 997: A format string vulnerability (localhost root) exists in xlock(1).
998: (patch included)</a>
1.294 david 999: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 1000: Various bugs found in X11 libraries have various side effects, almost
1001: completely denial of service in OpenBSD.
1002: (patch included)</a>
1.294 david 1003: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 1004: Just like pretty much all the other unix ftp daemons
1005: on the planet, ftpd had a remote root hole in it.
1006: Luckily, ftpd was not enabled by default.
1.137 deraadt 1007: The problem exists if anonymous ftp is enabled.
1.136 deraadt 1008: (patch included)</a>
1.294 david 1009: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 1010: Mopd, very rarely used, contained some buffer overflows.
1011: (patch included)</a>
1.294 david 1012: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 1013: libedit would check for a <b>.editrc</b> file in the current
1014: directory. Not known to be a real security issue, but a patch
1015: is available anyways.
1016: (patch included)</a>
1.294 david 1017: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 1018: A serious bug in dhclient(8) could allow strings from a
1019: malicious dhcp server to be executed in the shell as root.
1020: (patch included)</a>
1.294 david 1021: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 1022: A serious bug in isakmpd(8) policy handling wherein
1023: policy verification could be completely bypassed in isakmpd.
1024: (patch included)</a>
1.294 david 1025: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 1026: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
1027: should not be used, and results in security problems on
1028: other operating systems.</a>
1.294 david 1029: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 1030: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 1031: (patch included)</a>
1.294 david 1032: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 1033: Improper use of ipf <i>keep-state</i> rules can result
1034: in firewall rules being bypassed. (patch included)</a>
1035:
1.124 deraadt 1036: </ul>
1037:
1038: <p>
1039: <li>
1.288 matthieu 1040: <a name="26"></a>
1.119 deraadt 1041:
1.294 david 1042: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 1043: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 1044: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 1045: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
1046:
1047: <p>
1048: <ul>
1.294 david 1049: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 1050: SYSV semaphore support contained an undocumented system call
1.131 deraadt 1051: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 1052: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 1053: Improper use of ipf <i>keep-state</i> rules can result
1054: in firewall rules being bypassed. (patch included)</a>
1.294 david 1055: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 1056: xlockmore has a bug which a localhost attacker can use to gain
1057: access to the encrypted root password hash (which is normally
1.245 miod 1058: encoded using blowfish</a> (see
1.294 david 1059: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 1060: crypt(3)</a>)
1.245 miod 1061: (patch included).
1.294 david 1062: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 1063: Systems running with procfs enabled and mounted are
1064: vulnerable to a very tricky exploit. procfs is not
1065: mounted by default.
1066: (patch included).</a>
1.294 david 1067: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 1068: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 1069: thus exposing the system to a race where the aliases file
1070: did not exist.
1.119 deraadt 1071: (patch included).</a>
1.294 david 1072: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1073: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1074: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1075: A buffer overflow in the RSAREF code included in the
1076: USA version of libssl, is possibly exploitable in
1077: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1078: (patch included).<br></a>
1079: <strong>Update:</strong> Turns out that this was not exploitable
1080: in any of the software included in OpenBSD 2.6.
1.294 david 1081: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1082: Any user could change interface media configurations, resulting in
1083: a localhost denial of service attack.
1.121 deraadt 1084: (patch included).</a>
1.119 deraadt 1085: </ul>
1086:
1087: <p>
1088: <li>
1.288 matthieu 1089: <a name="25"></a>
1.106 deraadt 1090:
1.294 david 1091: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1092: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1093: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1094: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1095:
1.96 deraadt 1096: <p>
1.104 deraadt 1097: <ul>
1.294 david 1098: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1099: In cron(8), make sure argv[] is NULL terminated in the
1100: fake popen() and run sendmail as the user, not as root.
1101: (patch included).</a>
1.294 david 1102: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1103: filesystems had an overrun in their handling of uio_offset
1104: in their readdir() routines. (These filesystems are not
1105: enabled by default). (patch included).</a>
1.294 david 1106: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1107: when we execve() a new process. (patch included).</a>
1.294 david 1108: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1109: been handled by IPsec may be transmitted as cleartext.
1110: PF_KEY SA expirations may leak kernel resources.
1111: (patch included).</a>
1.294 david 1112: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1113: motd re-writing and change the find(1) to use -execdir
1114: (patch included).</a>
1.294 david 1115: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1116: users to chflags(2) or fchflags(2) on character or block devices
1117: which they may currently be the owner of (patch included).</a>
1.294 david 1118: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1119: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1120: </ul>
1121:
1.106 deraadt 1122: <p>
1123: <li>
1.288 matthieu 1124: <a name="24"></a>
1.235 miod 1125:
1.294 david 1126: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1127: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1128: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1129: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1130:
1.96 deraadt 1131: <p>
1.75 deraadt 1132: <ul>
1.294 david 1133: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1134: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1135: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1136: another kernel crash case caused by the <strong>crashme</strong>
1137: program (patch included).</a>
1.294 david 1138: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1139: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1140: (patch included).</a>
1.294 david 1141: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1142: existed in ping(8). (patch included).</a>
1.294 david 1143: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1144: the ipq, which could permit an attacker to cause a crash.
1145: (patch included).</a>
1.294 david 1146: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1147: kernel between accept(2) and select(2) could permit an attacker
1148: to hang sockets from remote.
1149: (patch included).</a>
1.294 david 1150: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1151: bog the machine excessively and cause problems.
1152: (patch included).</a>
1.294 david 1153: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1154: DDB interacted to possibly cause a crash.
1155: (patch included).</a>
1.294 david 1156: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1157: (patch included).</a>
1.294 david 1158: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1159: problem in bootpd(8). (patch included).</a>
1.294 david 1160: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1161: exploitable problem relating to environment variables in termcap
1162: and curses. (patch included).</a>
1.294 david 1163: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1164: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1165: </ul>
1166:
1.106 deraadt 1167: <p>
1168: <li>
1.288 matthieu 1169: <a name="23"></a>
1.235 miod 1170:
1.294 david 1171: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1172: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1173: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1174: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1175:
1.96 deraadt 1176: <p>
1.53 matthieu 1177: <ul>
1.294 david 1178: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1179: problem in bootpd(8). (patch included).</a>
1.294 david 1180: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1181: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1182: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1183: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1184: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1185: chpass(1) has a file descriptor leak which allows an
1186: attacker to modify /etc/master.passwd.</a>
1.294 david 1187: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1188: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1189: should not be executed with fd slots 0, 1, or 2 free.
1190: (patch included).</a>
1.294 david 1191: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1192: libraries (patches included).</a>
1.294 david 1193: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1194: processes too permissive (4th revision patch included).</a>
1.294 david 1195: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1196: of immutable and append-only file flags. (patch included).</a>
1.294 david 1197: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1198: if IPSEC is enabled (patch included).</a>
1.294 david 1199: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1200: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1201: </ul>
1.9 deraadt 1202:
1.106 deraadt 1203: <p>
1204: <li>
1.288 matthieu 1205: <a name="22"></a>
1.235 miod 1206:
1.294 david 1207: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1208: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1209: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1210: still exist in other operating systems. (The supplied patches are for
1211: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1212:
1.96 deraadt 1213: <p>
1.9 deraadt 1214: <ul>
1.294 david 1215: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1216: packets if IPSEC is enabled (patch included).</a>
1.294 david 1217: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1218: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1219: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1220: (patch included).</a>
1.294 david 1221: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1222: (patch included).</a>
1.294 david 1223: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1224: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1225: (patch included).</a>
1.294 david 1226: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1227: export (patch included).</a>
1.112 philen 1228: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1229: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1230: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1231: Acceptance.</a>
1.294 david 1232: A patch is available <a href="errata22.html#sourceroute">here</a>.
1233: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1234: flaw (patch included).</a>
1.294 david 1235: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1236: </ul>
1237:
1.106 deraadt 1238: <p>
1239: <li>
1.288 matthieu 1240: <a name="21"></a>
1.235 miod 1241:
1.294 david 1242: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1243: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1244: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1245: exist in other operating systems. (If you are running OpenBSD 2.1, we
1246: would strongly recommend an upgrade to the newest release, as this
1247: patch list only attempts at fixing the most important security
1248: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1249: security problems. Many of those problems were solved in ways which
1250: make it hard for us to provide patches).
1251:
1.96 deraadt 1252: <p>
1.52 deraadt 1253: <ul>
1.112 philen 1254: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1255: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1256: (patch included)</a>
1.112 philen 1257: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1258: </ul>
1.51 deraadt 1259:
1.106 deraadt 1260: <p>
1261: <li>
1.288 matthieu 1262: <a name="20"></a>
1.235 miod 1263:
1.294 david 1264: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1265: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1266: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1267: exist in other operating systems. (If you are running OpenBSD 2.0, we
1268: commend you for being there back in the old days!, but you're really
1269: missing out if you don't install a new version!)
1270:
1271: <p>
1272: <ul>
1.112 philen 1273: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1274: resolver (patch included)</a>
1275: <li>Many others... if people can hunt them down, please let me know
1276: and we'll put them up here.
1277: </ul>
1.51 deraadt 1278: <p>
1.106 deraadt 1279:
1.288 matthieu 1280: <a name="watching"></a>
1.294 david 1281: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1282:
1.21 deraadt 1283: Since we take a proactive stance with security, we are continually
1284: finding and fixing new security problems. Not all of these problems
1.80 espie 1285: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1286: confirmed to be exploitable; many simple bugs we fix do turn out to
1287: have security consequences we could not predict. We do not have the
1288: time resources to make these changes available in the above format.<p>
1.21 deraadt 1289:
1290: Thus there are usually minor security fixes in the current source code
1291: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1292: guarantee that these problems are of minimal impact and unproven
1.44 ian 1293: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1294: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1295:
1.45 deraadt 1296: People who are really concerned with security can do a number of
1297: things:<p>
1.21 deraadt 1298:
1299: <ul>
1300: <li>If you understand security issues, watch our
1.294 david 1301: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1302: eye out for things which appear security related. Since
1.21 deraadt 1303: exploitability is not proven for many of the fixes we make,
1304: do not expect the relevant commit message to say "SECURITY FIX!".
1305: If a problem is proven and serious, a patch will be available
1306: here very shortly after.
1.161 horacio 1307: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1308: security-announce mailing list</a> which will notify you for every
1.186 ian 1309: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1310: and instruct you on how to patch the problem.
1.21 deraadt 1311: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1312: complete system build from time to time (read /usr/src/Makefile
1313: carefully). Users can make the assumption that the current
1314: source tree always has stronger security than the previous release.
1.45 deraadt 1315: However, building your own system from source code is not trivial;
1.265 miod 1316: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1317: transition between major releases.
1.115 ericj 1318: <li>Install a binary snapshot for your
1.80 espie 1319: architecture, which are made available fairly often. For
1.29 deraadt 1320: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1321: </ul>
1322:
1.9 deraadt 1323: <p>
1.288 matthieu 1324: <a name="reporting"></a>
1.294 david 1325: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1326:
1.5 deraadt 1327: <p> If you find a new security problem, you can mail it to
1.294 david 1328: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1329: <br>
1.5 deraadt 1330: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1331: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1332:
1.107 deraadt 1333: <p>
1.288 matthieu 1334: <a name="papers"></a>
1.294 david 1335: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1336:
1337: A number of papers have been written by OpenBSD team members, about security
1338: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1339: documents are available as follows.<p>
1.107 deraadt 1340:
1341: <ul>
1.113 deraadt 1342: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1343: <a href="events.html#usenix99">Usenix 1999</a>,
1344: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1345: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1346: <a href="papers/bcrypt-paper.ps">paper</a> and
1347: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1348: <p>
1349: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1350: <a href="events.html#usenix99">Usenix 1999</a>,
1351: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1352: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1353: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1354: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1355: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1356: <a href="papers/crypt-paper.ps">paper</a> and
1357: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1358: <p>
1359: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1360: <a href="events.html#usenix99">Usenix 1999</a>,
1361: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1362: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1363: <a href="papers/strlcpy-paper.ps">paper</a> and
1364: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1365: <p>
1.118 deraadt 1366: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1367: <a href="events.html#lisa99">LISA 1999</a>,
1368: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1369: <a href="papers/authgw-paper.ps">paper</a> and
1370: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1371: <p>
1.153 jufi 1372: <li>Encrypting Virtual Memory<br>
1.294 david 1373: <a href="events.html#sec2000">Usenix Security 2000</a>,
1374: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1375: <a href="papers/swapencrypt.ps">paper</a> and
1376: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1377: <p>
1.107 deraadt 1378: </ul>
1.294 david 1379: </ul>
1.106 deraadt 1380:
1.2 deraadt 1381: <hr>
1.294 david 1382: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1383: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1384: <br>
1.318 ! deraadt 1385: <small>$OpenBSD: security.html,v 1.317 2005/07/23 00:47:04 millert Exp $</small>
1.1 deraadt 1386:
1.24 deraadt 1387: </body>
1388: </html>
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