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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>,
58: <a href="#36">3.6</a>.
1.114 philen 59: </td>
60: </tr>
61: </table>
1.56 deraadt 62: <hr>
63:
1.294 david 64: <a name="goals"></a>
1.278 deraadt 65: <ul>
1.294 david 66: <li><h3><font color="#e00000">Goal</font></h3><p>
1.22 deraadt 67:
1.14 deraadt 68: OpenBSD believes in strong security. Our aspiration is to be NUMBER
1.22 deraadt 69: ONE in the industry for security (if we are not already there). Our
70: open software development model permits us to take a more
71: uncompromising view towards increased security than Sun, SGI, IBM, HP,
72: or other vendors are able to. We can make changes the vendors would
1.27 deraadt 73: not make. Also, since OpenBSD is exported with <a href=crypto.html>
1.45 deraadt 74: cryptography</a>, we are able to take cryptographic approaches towards
75: fixing security problems.<p>
1.18 deraadt 76:
1.288 matthieu 77: <a name="disclosure"></a>
1.294 david 78: <li><h3><font color="#e00000">Full Disclosure</font></h3><p>
1.106 deraadt 79:
1.45 deraadt 80: Like many readers of the
1.196 jufi 81: <a href="http://online.securityfocus.com/archive/1">
1.18 deraadt 82: BUGTRAQ mailing list</a>,
1.106 deraadt 83: we believe in full disclosure of security problems. In the
84: operating system arena, we were probably the first to embrace
85: the concept. Many vendors, even of free software, still try
86: to hide issues from their users.<p>
87:
88: Security information moves very fast in cracker circles. On the other
89: hand, our experience is that coding and releasing of proper security
90: fixes typically requires about an hour of work -- very fast fix
91: turnaround is possible. Thus we think that full disclosure helps the
92: people who really care about security.<p>
93:
1.288 matthieu 94: <a name="process"></a>
1.294 david 95: <li><h3><font color="#e00000">Audit Process</font></h3><p>
1.15 deraadt 96:
1.12 deraadt 97: Our security auditing team typically has between six and twelve
1.45 deraadt 98: members who continue to search for and fix new security holes. We
99: have been auditing since the summer of 1996. The process we follow to
100: increase security is simply a comprehensive file-by-file analysis of
1.106 deraadt 101: every critical software component. We are not so much looking for
102: security holes, as we are looking for basic software bugs, and if
1.138 deraadt 103: years later someone discovers the problem used to be a security
1.106 deraadt 104: issue, and we fixed it because it was just a bug, well, all the
105: better. Flaws have been found in just about every area of the system.
106: Entire new classes of security problems have been found during our
107: audit, and often source code which had been audited earlier needs
108: re-auditing with these new flaws in mind. Code often gets audited
109: multiple times, and by multiple people with different auditing
110: skills.<p>
1.12 deraadt 111:
1.94 deraadt 112: Some members of our security auditing team worked for Secure Networks,
113: the company that made the industry's premier network security scanning
114: software package Ballista (Secure Networks got purchased by Network
115: Associates, Ballista got renamed to Cybercop Scanner, and well...)
116: That company did a lot of security research, and thus fit in well
1.106 deraadt 117: with the OpenBSD stance. OpenBSD passed Ballista's tests with flying
118: colours since day 1.<p>
1.31 deraadt 119:
1.34 deraadt 120: Another facet of our security auditing process is its proactiveness.
1.45 deraadt 121: In most cases we have found that the determination of exploitability
122: is not an issue. During our ongoing auditing process we find many
123: bugs, and endeavor to fix them even though exploitability is not
124: proven. We fix the bug, and we move on to find other bugs to fix. We
125: have fixed many simple and obvious careless programming errors in code
126: and only months later discovered that the problems were in fact
127: exploitable. (Or, more likely someone on
1.197 jufi 128: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>
1.45 deraadt 129: would report that other operating systems were vulnerable to a `newly
130: discovered problem', and then it would be discovered that OpenBSD had
131: been fixed in a previous release). In other cases we have been saved
132: from full exploitability of complex step-by-step attacks because we
133: had fixed one of the intermediate steps. An example of where we
1.94 deraadt 134: managed such a success is the lpd advisory that Secure Networks put out.
135: <p>
1.29 deraadt 136:
1.288 matthieu 137: <a name="newtech"></a>
1.294 david 138: <li><h3><font color="#e00000">New Technologies</font></h3><p>
1.278 deraadt 139:
140: As we audit source code, we often invent new ways of solving problems.
141: Sometimes these ideas have been used before in some random application
142: written somewhere, but perhaps not taken to the degree that we do.
143: <p>
144:
145: <ul>
146: <li>strlcpy() and strlcat()
147: <li>Memory protection purify
148: <ul>
149: <li>W^X
150: <li>.rodata segment
151: <li>Guard pages
152: <li>Randomized malloc()
153: <li>Randomized mmap()
154: <li>atexit() and stdio protection
155: </ul>
1.295 otto 156: <li>Privilege separation
1.278 deraadt 157: <li>Privilege revocation
158: <li>Chroot jailing
159: <li>New uids
160: <li>ProPolice
161: <li>... and others
162: </ul>
163: <p>
164:
1.294 david 165: <li><h3><font color="#e00000">The Reward</font></h3><p>
1.106 deraadt 166:
1.45 deraadt 167: Our proactive auditing process has really paid off. Statements like
1.35 deraadt 168: ``This problem was fixed in OpenBSD about 6 months ago'' have become
1.45 deraadt 169: commonplace in security forums like
1.197 jufi 170: <a href="http://online.securityfocus.com/archive/1">BUGTRAQ</a>.<p>
1.35 deraadt 171:
1.45 deraadt 172: The most intense part of our security auditing happened immediately
1.80 espie 173: before the OpenBSD 2.0 release and during the 2.0->2.1 transition,
1.45 deraadt 174: over the last third of 1996 and first half of 1997. Thousands (yes,
175: thousands) of security issues were fixed rapidly over this year-long
176: period; bugs like the standard buffer overflows, protocol
177: implementation weaknesses, information gathering, and filesystem
178: races. Hence most of the security problems that we encountered were
179: fixed before our 2.1 release, and then a far smaller number needed
180: fixing for our 2.2 release. We do not find as many problems anymore,
181: it is simply a case of diminishing returns. Recently the security
182: problems we find and fix tend to be significantly more obscure or
183: complicated. Still we will persist for a number of reasons:<p>
1.36 deraadt 184:
1.35 deraadt 185: <ul>
1.45 deraadt 186: <li>Occasionally we find a simple problem we missed earlier. Doh!
1.35 deraadt 187: <li>Security is like an arms race; the best attackers will continue
1.45 deraadt 188: to search for more complicated exploits, so we will too.
189: <li>Finding and fixing subtle flaws in complicated software is
190: a lot of fun.
1.35 deraadt 191: </ul>
1.106 deraadt 192: <p>
1.15 deraadt 193:
1.14 deraadt 194: The auditing process is not over yet, and as you can see we continue
1.28 deraadt 195: to find and fix new security flaws.<p>
1.12 deraadt 196:
1.288 matthieu 197: <a name="default"></a>
1.294 david 198: <li><h3><font color="#e00000">"Secure by Default"</font></h3><p>
1.106 deraadt 199:
200: To ensure that novice users of OpenBSD do not need to become security
201: experts overnight (a viewpoint which other vendors seem to have), we
202: ship the operating system in a Secure by Default mode. All non-essential
203: services are disabled. As the user/administrator becomes more familiar
204: with the system, he will discover that he has to enable daemons and other
205: parts of the system. During the process of learning how to enable a new
206: service, the novice is more likely to learn of security considerations.<p>
207:
208: This is in stark contrast to the increasing number of systems that
209: ship with NFS, mountd, web servers, and various other services enabled
210: by default, creating instantaneous security problems for their users
211: within minutes after their first install.<p>
212:
1.288 matthieu 213: <a name="crypto"></a>
1.294 david 214: <li><h3><font color="#e00000">Cryptography</font></h3><p>
1.106 deraadt 215:
216: And of course, since the OpenBSD project is based in Canada, it is possible
217: for us to integrate cryptography. For more information, read the page
1.116 deraadt 218: outlining <a href=crypto.html>what we have done with cryptography</a>.</p>
1.106 deraadt 219:
1.294 david 220: <li><h3><font color="#e00000">Advisories</font></h3><p>
1.106 deraadt 221:
222: <li>
1.301 miod 223: <a name="36"></a>
224:
225: <h3><font color="#e00000">OpenBSD 3.6 Security Advisories</font></h3>
226: These are the OpenBSD 3.6 advisories -- all these problems are solved
227: in <a href=anoncvs.html>OpenBSD current</a> and the
228: <a href=stable.html>patch branch</a>.
229:
230: <p>
1.302 markus 231: <ul>
1.304 brad 232: <li><a href="errata.html#httpd">Jan 12, 2005:
233: httpd(8)'s mod_include module fails to properly validate
234: the length of user supplied tag strings prior to copying
1.305 ! brad 235: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 236: <li><a href="errata.html#pfkey">Dec 14, 2004:
237: On systems running isakmpd(8) it is possible for a local
238: user to cause kernel memory corruption and system panic by
1.303 markus 239: setting ipsec(4) credentials on a socket.</a>
1.302 markus 240: </ul>
1.301 miod 241:
242: <p>
243: <li>
1.288 matthieu 244: <a name="35"></a>
1.279 deraadt 245:
1.294 david 246: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 247: These are the OpenBSD 3.5 advisories -- all these problems are solved
248: in <a href=anoncvs.html>OpenBSD current</a> and the
249: <a href=stable.html>patch branch</a>.
250:
251: <p>
252: <ul>
1.304 brad 253: <li><a href="errata35.html#httpd3">Jan 12, 2005:
254: httpd(8)'s mod_include module fails to properly validate
255: the length of user supplied tag strings prior to copying
1.305 ! brad 256: them to a local buffer, causing a buffer overflow.</a>
1.302 markus 257: <li><a href="errata35.html#pfkey">Dec 14, 2004:
258: On systems running isakmpd(8) it is possible for a local
259: user to cause kernel memory corruption and system panic by
1.303 markus 260: setting ipsec(4) credentials on a socket.</a>
1.301 miod 261: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 262: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 263: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 264: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 265: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 266: httpd(8)'s mod_rewrite module can be made to write one zero byte in
267: an arbitrary memory position outside of a char array, causing a DoS
268: or possibly buffer overflows.</a>
1.301 miod 269: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 270: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 271: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 272: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 273: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 274: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 275: Multiple remote vulnerabilities have been found in the cvs(1)
276: server which can be used by CVS clients to crash or execute
1.293 brad 277: arbitrary code on the server.</a>
1.301 miod 278: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 279: kdc(8) performs inadequate checking of request fields, leading
280: to the possibility of principal impersonation from other
281: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 282: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 283: xdm(1) ignores the requestPort resource and creates a
1.293 brad 284: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 285: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 286: A buffer overflow in the cvs(1) server has been found,
287: which can be used by CVS clients to execute arbitrary code on
1.293 brad 288: the server.</a>
1.301 miod 289: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 290: Integer overflow problems were found in procfs, allowing
1.293 brad 291: reading of arbitrary kernel memory.</a>
1.301 miod 292: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 293: Pathname validation problems have been found in cvs(1),
294: allowing clients and servers access to files outside the
1.293 brad 295: repository or local CVS tree.</a>
1.279 deraadt 296: </ul>
297:
298: <p>
1.301 miod 299: OpenBSD 3.4 and earlier releases are not supported anymore. The following
300: paragraphs only list advisories issued while they were maintained; these
301: releases are likely to be affected by the advisories for more recent releases.
302: <br>
303:
1.279 deraadt 304: <li>
1.288 matthieu 305: <a name="34"></a>
1.261 david 306:
1.294 david 307: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 308: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 309: in <a href="anoncvs.html">OpenBSD current</a>. The
310: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
311: you should update your machine.
1.261 david 312: <p>
313: <ul>
1.302 markus 314: <li><a href="errata34.html#pfkey">Dec 14, 2004:
315: On systems running isakmpd(8) it is possible for a local
316: user to cause kernel memory corruption and system panic by
1.303 markus 317: setting ipsec(4) credentials on a socket.</a>
1.298 brad 318: <li><a href="errata34.html#xpm">Sep 16, 2004:
319: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 320: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
321: httpd(8)'s mod_rewrite module can be made to write one zero byte in
322: an arbitrary memory position outside of a char array, causing a DoS
323: or possibly buffer overflows.</a>
1.294 david 324: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 325: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 326: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 327: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 328: an attacker can delete IPsec tunnels at will.</a>
1.294 david 329: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 330: Multiple remote vulnerabilities have been found in the cvs(1)
331: server which can be used by CVS clients to crash or execute
1.293 brad 332: arbitrary code on the server.</a>
1.294 david 333: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 334: kdc(8) performs inadequate checking of request fields, leading
335: to the possibility of principal impersonation from other
336: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 337: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 338: A buffer overflow in the cvs(1) server has been found,
339: which can be used by CVS clients to execute arbitrary code on
340: the server.</a>
1.294 david 341: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 342: Integer overflow problems were found in procfs, allowing
343: reading of arbitrary kernel memory.</a>
1.294 david 344: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 345: Pathname validation problems have been found in cvs(1),
346: allowing clients and servers access to files outside the
347: repository or local CVS tree.</a>
1.294 david 348: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 349: A missing check for a NULL-pointer dereference may allow a
1.281 otto 350: remote attacker to crash applications using OpenSSL.</a>
1.294 david 351: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 352: Defects in the payload validation and processing functions of
353: isakmpd have been discovered. An attacker could send malformed
354: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 355: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 356: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
357: access module, using IP addresses without a netmask on big endian
358: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 359: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 360: An IPv6 MTU handling problem exists that could be used by an
361: attacker to cause a denial of service attack.</a>
1.294 david 362: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 363: A reference counting bug in shmat(2) could be used to write to
364: kernel memory under certain circumstances.</a>
1.294 david 365: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 366: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 367: by Thomas Walpuski.</a>
1.294 david 368: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 369: It may be possible for a local user to overrun the stack in
370: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 371: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 372: The use of certain ASN.1 encodings or malformed public keys may
373: allow an attacker to mount a denial of service attack against
374: applications linked with ssl(3).</a>
1.261 david 375: </ul>
376:
377: <li>
1.288 matthieu 378: <a name="33"></a>
1.246 deraadt 379:
1.294 david 380: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 381: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 382: in <a href="anoncvs.html">OpenBSD current</a>. The
383: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 384: you should update your machine.
1.246 deraadt 385: <p>
386: <ul>
1.294 david 387: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 388: Pathname validation problems have been found in cvs(1),
389: allowing clients and servers access to files outside the
390: repository or local CVS tree.</a>
1.294 david 391: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 392: A missing check for a NULL-pointer dereference may allow a
1.281 otto 393: remote attacker to crash applications using OpenSSL.</a>
1.294 david 394: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 395: Defects in the payload validation and processing functions of
396: isakmpd have been discovered. An attacker could send malformed
397: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 398: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 399: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
400: access module, using IP addresses without a netmask on big endian
401: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 402: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 403: An IPv6 MTU handling problem exists that could be used by an
404: attacker to cause a denial of service attack.</a>
1.294 david 405: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 406: A reference counting bug in shmat(2) could be used to write to
407: kernel memory under certain circumstances.</a>
1.294 david 408: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 409: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 410: by Thomas Walpuski.</a>
1.294 david 411: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 412: It may be possible for a local user to execute arbitrary code
413: resulting in escalation of privileges due to a stack overrun
414: in compat_ibcs2(8).</a>
1.294 david 415: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 416: The use of certain ASN.1 encodings or malformed public keys may
417: allow an attacker to mount a denial of service attack against
418: applications linked with ssl(3).</a>
1.294 david 419: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 420: Access of freed memory in pf(4) could be used to
1.260 margarid 421: remotely panic a machine using scrub rules.</a>
1.294 david 422: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 423: A buffer overflow in the address parsing in
424: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 425: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 426: OpenSSH versions prior to 3.7 contains a buffer management error
427: that is potentially exploitable.</a>
1.294 david 428: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 429: Root may be able to reduce the security level by taking advantage of
430: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 431: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 432: An improper bounds check in the kernel may allow a local user
433: to panic the kernel.</a>
1.294 david 434: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 435: An off-by-one error exists in the C library function realpath(3)
436: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 437: </ul>
438:
1.265 miod 439:
1.247 david 440: <p>
1.246 deraadt 441: <li>
1.288 matthieu 442: <a name="32"></a>
1.224 deraadt 443:
1.294 david 444: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 445: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 446: in <a href="anoncvs.html">OpenBSD current</a>. The
447: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 448: you should update your machine.
1.224 deraadt 449: <p>
450: <ul>
1.294 david 451: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 452: The use of certain ASN.1 encodings or malformed public keys may
453: allow an attacker to mount a denial of service attack against
454: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 455: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 456: Access of freed memory in pf(4) could be used to
1.260 margarid 457: remotely panic a machine using scrub rules.</a>
1.294 david 458: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 459: A buffer overflow in the address parsing in
460: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 461: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 462: OpenSSH versions prior to 3.7 contains a buffer management error
463: that is potentially exploitable.</a>
1.294 david 464: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 465: Fix for a potential security issue in
466: sendmail(8) with respect to DNS maps.</a>
1.294 david 467: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 468: An off-by-one error exists in the C library function realpath(3)
469: may allow an attacker to gain escalated privileges.</a>
1.294 david 470: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 471: A buffer overflow in the address parsing in
472: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 473: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 474: A cryptographic weaknesses in the Kerberos v4 protocol can be
475: exploited on Kerberos v5 as well.</a>
1.294 david 476: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 477: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 478: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 479: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 480: Various SSL and TLS operations in OpenSSL are vulnerable to
481: timing attacks.</a>
1.294 david 482: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 483: A buffer overflow in lprm(1) may allow an attacker to elevate
484: privileges to user daemon.</a>.
1.294 david 485: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 486: A buffer overflow in the envelope comments processing in
487: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 488: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 489: httpd(8) leaks file inode numbers via ETag header as well as
490: child PIDs in multipart MIME boundary generation. This could
491: lead, for example, to NFS exploitation because it uses inode
492: numbers as part of the file handle.</a>
1.294 david 493: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 494: In ssl(8) an information leak can occur via timing by performing
495: a MAC computation even if incorrect block cipher padding has
496: been found, this is a countermeasure. Also, check for negative
497: sizes, in allocation routines.</a>
1.294 david 498: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 499: A double free exists in cvs(1) that could lead to privilege
500: escalation for cvs configurations where the cvs command is
1.233 margarid 501: run as a privileged user.</a>
1.294 david 502: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 503: A buffer overflow exists in named(8) that could lead to a
504: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 505: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 506: A logic error in the pool kernel memory allocator could cause
507: memory corruption in low-memory situations, causing the system
508: to crash.</a>
1.294 david 509: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 510: An attacker can bypass smrsh(8)'s restrictions and execute
511: arbitrary commands with the privileges of his own account.</a>
1.294 david 512: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 513: Network bridges running pf with scrubbing enabled could cause
514: mbuf corruption, causing the system to crash.</a>
1.294 david 515: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 516: A buffer overflow can occur in the kadmind(8) daemon, leading
517: to possible remote crash or exploit.</a>
1.224 deraadt 518: </ul>
519:
1.227 miod 520: <p>
521: <li>
1.288 matthieu 522: <a name="31"></a>
1.203 deraadt 523:
1.294 david 524: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 525: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 526: in <a href="anoncvs.html">OpenBSD current</a>. The
527: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 528: you should update your machine.
1.203 deraadt 529:
530: <p>
531: <ul>
1.294 david 532: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 533: A buffer overflow in the address parsing in
534: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 535: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 536: A cryptographic weaknesses in the Kerberos v4 protocol can be
537: exploited on Kerberos v5 as well.</a>
1.294 david 538: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 539: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 540: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 541: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 542: Various SSL and TLS operations in OpenSSL are vulnerable to
543: timing attacks.</a>
1.294 david 544: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 545: A buffer overflow in lprm(1) may allow an attacker to gain
546: root privileges.</a>
1.294 david 547: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 548: A buffer overflow in the envelope comments processing in
549: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 550: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 551: In ssl(8) an information leak can occur via timing by performing
552: a MAC computation even if incorrect block cipher padding has
553: been found, this is a countermeasure. Also, check for negative
554: sizes, in allocation routines.</a>
1.294 david 555: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 556: A double free exists in cvs(1) that could lead to privilege
557: escalation for cvs configurations where the cvs command is
1.294 david 558: run as a privileged user</a>.
559: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 560: A buffer overflow exists in named(8) that could lead to a
561: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 562: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 563: Incorrect argument checking in the getitimer(2) system call
564: may allow an attacker to crash the system.</a>
1.294 david 565: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 566: An attacker can bypass smrsh(8)'s restrictions and execute
567: arbitrary commands with the privileges of his own account.</a>
1.294 david 568: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 569: A buffer overflow can occur in the kadmind(8) daemon, leading
570: to possible remote crash or exploit.</a>
1.294 david 571: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 572: Incorrect argument checking in the setitimer(2) system call
573: may allow an attacker to write to kernel memory.</a>
1.294 david 574: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 575: An insufficient boundary check in the select system call
1.220 miod 576: allows an attacker to overwrite kernel memory and execute arbitrary code
577: in kernel context.</a>
1.294 david 578: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 579: Several remote buffer overflows can occur in the SSL2 server and SSL3
580: client of the ssl(8) library, as in the ASN.1 parser code in the
581: crypto(3) library, all of them being potentially remotely
582: exploitable.</a>
1.294 david 583: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 584: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
585: possible remote crash.</a>
1.294 david 586: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 587: A race condition exists in the pppd(8) daemon which may cause it to
588: alter the file permissions of an arbitrary file.</a>
1.294 david 589: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 590: Receiving IKE payloads out of sequence can cause isakmpd(8) to
591: crash.</a>
1.294 david 592: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 593: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 594: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 595: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 596: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 597: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 598: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 599: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 600: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 601: input validation error that can result in an integer overflow and
602: privilege escalation.</a>
1.294 david 603: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 604: A buffer overflow can occur during the interpretation of chunked
605: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 606: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 607: Under certain conditions, on systems using YP with netgroups
608: in the password database, it is possible that sshd(8) does
609: ACL checks for the requested user name but uses the password
610: database entry of a different user for authentication. This
611: means that denied users might authenticate successfully
612: while permitted users could be locked out.</a>
1.294 david 613: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 614: A race condition exists that could defeat the kernel's
615: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 616: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 617: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 618: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 619: A local user can gain super-user privileges due to a buffer
620: overflow in sshd(8) if AFS has been configured on the system
621: or if KerberosTgtPassing or AFSTokenPassing has been enabled
622: in the sshd_config file.</a>
1.203 deraadt 623: </ul>
624:
1.235 miod 625: <p>
1.203 deraadt 626: <li>
1.288 matthieu 627: <a name="30"></a>
1.187 deraadt 628:
1.294 david 629: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 630: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 631: in <a href="anoncvs.html">OpenBSD current</a>. The
632: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 633: you should update your machine.
1.187 deraadt 634:
635: <p>
636: <ul>
1.294 david 637: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 638: A buffer overflow exists in named(8) that could lead to a
639: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 640: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 641: Incorrect argument checking in the getitimer(2) system call
642: may allow an attacker to crash the system.</a>
1.294 david 643: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 644: An attacker can bypass smrsh(8)'s restrictions and execute
645: arbitrary commands with the privileges of his own account.</a>
1.294 david 646: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 647: A buffer overflow can occur in the kadmind(8) daemon, leading
648: to possible remote crash or exploit.</a>
1.294 david 649: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 650: Incorrect argument checking in the setitimer(2) system call
651: may allow an attacker to write to kernel memory.</a>
1.294 david 652: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 653: An insufficient boundary check in the select and poll system calls
654: allows an attacker to overwrite kernel memory and execute arbitrary code
655: in kernel context.</a>
1.294 david 656: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 657: Several remote buffer overflows can occur in the SSL2 server and SSL3
658: client of the ssl(8) library, as in the ASN.1 parser code in the
659: crypto(3) library, all of them being potentially remotely
660: exploitable.</a>
1.294 david 661: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 662: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
663: possible remote crash.</a>
1.294 david 664: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 665: A race condition exists in the pppd(8) daemon which may cause it to
666: alter the file permissions of an arbitrary file.</a>
1.294 david 667: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 668: Receiving IKE payloads out of sequence can cause isakmpd(8) to
669: crash.</a>
1.294 david 670: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 671: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 672: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 673: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 674: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 675: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 676: input validation error that can result in an integer overflow and
677: privilege escalation.</a>
1.294 david 678: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 679: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 680: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 681: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 682: A buffer overflow can occur during the interpretation of chunked
683: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 684: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 685: A race condition exists that could defeat the kernel's
686: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 687: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 688: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 689: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 690: A local user can gain super-user privileges due to a buffer
691: overflow in sshd(8) if AFS has been configured on the system
692: or if KerberosTgtPassing or AFSTokenPassing has been enabled
693: in the sshd_config file.</a>
1.294 david 694: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 695: The mail(1) was interpreting tilde escapes even when invoked
696: in non-interactive mode. As mail(1) is called as root from cron,
697: this can lead to a local root compromise.</a>
1.294 david 698: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 699: Under certain conditions, on systems using YP with netgroups in
700: the password database, it is possible for the rexecd(8) and rshd(8)
701: daemons to execute a shell from a password database entry for a
702: different user. Similarly, atrun(8) may change to the wrong
703: home directory when running jobs.</a>
1.294 david 704: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 705: A potential double free() exists in the zlib library;
706: this is not exploitable on OpenBSD.
707: The kernel also contains a copy of zlib; it is not
708: currently known if the kernel zlib is exploitable.</a>
1.294 david 709: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 710: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 711: may allow a local user to gain super-user privileges.</a>
1.294 david 712: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 713: A race condition between the ptrace(2) and execve(2) system calls
714: allows an attacker to modify the memory contents of suid/sgid
715: processes which could lead to compromise of the super-user account.</a>
1.294 david 716: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 717: There is a security hole in sudo(8) that can be exploited
718: when the Postfix sendmail replacement is installed that may
719: allow an attacker on the local host to gain root privileges.</a>
1.294 david 720: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 721: An attacker can trick a machine running the lpd daemon into
722: creating new files in the root directory from a machine with
723: remote line printer access.</a>
1.294 david 724: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 725: The vi.recover script can be abused in such a way as
726: to cause arbitrary zero-length files to be removed.</a>
1.294 david 727: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 728: pf(4) was incapable of dealing with certain ipv6 icmp packets,
729: resulting in a crash.</a>
1.294 david 730: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 731: A security hole that may allow an attacker to partially authenticate
732: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 733: </ul>
734:
735: <p>
736: <li>
1.288 matthieu 737: <a name="29"></a>
1.173 deraadt 738:
1.294 david 739: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 740: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 741: in <a href="anoncvs.html">OpenBSD current</a>. The
742: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 743: you should update your machine.
744:
1.173 deraadt 745:
746: <p>
747: <ul>
1.294 david 748: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 749: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 750: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 751: A race condition exists that could defeat the kernel's
752: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 753: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 754: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 755: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 756: A local user can gain super-user privileges due to a buffer
757: overflow in sshd(8) if AFS has been configured on the system
758: or if KerberosTgtPassing or AFSTokenPassing has been enabled
759: in the sshd_config file.</a>
1.294 david 760: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 761: The mail(1) was interpreting tilde escapes even when invoked
762: in non-interactive mode. As mail(1) is called as root from cron,
763: this can lead to a local root compromise.</a>
1.294 david 764: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 765: A potential double free() exists in the zlib library;
766: this is not exploitable on OpenBSD.
767: The kernel also contains a copy of zlib; it is not
768: currently known if the kernel zlib is exploitable.</a>
1.294 david 769: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 770: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 771: may allow a local user to gain super-user privileges.</a>
1.294 david 772: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 773: A race condition between the ptrace(2) and execve(2) system calls
774: allows an attacker to modify the memory contents of suid/sgid
775: processes which could lead to compromise of the super-user account.</a>
1.294 david 776: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 777: There is a security hole in sudo(8) that can be exploited
778: when the Postfix sendmail replacement is installed that may
779: allow an attacker on the local host to gain root privileges.</a>
1.294 david 780: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 781: An attacker can trick a machine running the lpd daemon into
782: creating new files in the root directory from a machine with
783: remote line printer access.</a>
1.294 david 784: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 785: The vi.recover script can be abused in such a way as
786: to cause arbitrary zero-length files to be removed.</a>
1.294 david 787: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 788: A security hole exists in uuxqt(8) that may allow an
789: attacker to gain root privileges.</a>
1.294 david 790: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 791: A security hole exists in lpd(8) that may allow an
792: attacker to gain root privileges if lpd is running.</a>
1.294 david 793: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 794: A security hole exists in sendmail(8) that may allow an
795: attacker on the local host to gain root privileges.</a>
1.294 david 796: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 797: A kernel buffer overflow in the NFS code can be used to execute
798: arbitrary code by users with mount privileges (only root by
1.181 millert 799: default).</a>
1.294 david 800: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 801: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 802: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 803: sshd(8) allows users to delete arbitrary files named "cookies"
804: if X11 forwarding is enabled. X11 forwarding is disabled
805: by default.</a>
1.294 david 806: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 807: Programs using the fts routines can be tricked into changing
808: into the wrong directory.</a>
1.294 david 809: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 810: Sendmail signal handlers contain unsafe code,
811: leading to numerous race conditions.</a>
1.173 deraadt 812: </ul>
813:
814: <p>
815: <li>
1.288 matthieu 816: <a name="28"></a>
1.152 deraadt 817:
1.294 david 818: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 819: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 820: in <a href="anoncvs.html">OpenBSD current</a>. The
821: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 822: you should update your machine.
823:
1.152 deraadt 824:
825: <p>
826: <ul>
1.294 david 827: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 828: A security hole exists in uuxqt(8) that may allow an
829: attacker to gain root privileges.</a>
1.294 david 830: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 831: A security hole exists in lpd(8) that may allow an
832: attacker to gain root privileges if lpd is running.</a>
1.294 david 833: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 834: A security hole exists in sendmail(8) that may allow an
835: attacker on the local host to gain root privileges.</a>
1.294 david 836: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 837: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 838: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 839: Programs using the fts routines can be tricked into changing
840: into the wrong directory.</a>
1.294 david 841: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 842: Sendmail signal handlers contain unsafe code,
843: leading to numerous race conditions.</a>
1.294 david 844: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 845: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 846: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 847: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 848: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 849: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 850: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 851: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 852: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 853: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 854: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 855: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 856: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 857: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 858: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 859: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 860: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 861: rnd(4) did not use all of its input when written to.</a>
1.294 david 862: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 863: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 864: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 865: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 866: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 867: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 868: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 869: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 870: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 871: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 872: </ul>
873:
874: <p>
875: <li>
1.288 matthieu 876: <a name="27"></a>
1.124 deraadt 877:
1.294 david 878: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 879: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 880: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 881: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
882:
883: <p>
884: <ul>
1.294 david 885: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 886: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 887: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 888: a buffer overflow was fixed in sudo(8).</a>
1.294 david 889: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 890: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 891: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 892: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
893: (patch included)</a>
1.294 david 894: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 895: X11 libraries have 2 potential overflows in xtrans code.
896: (patch included)</a>
1.294 david 897: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 898: Apache mod_rewrite and mod_vhost_alias modules could expose files
899: on the server in certain configurations if used.
900: (patch included)</a>
1.294 david 901: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 902: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
903: TERMPATH and TERMCAP environment variables as it should.
904: (patch included)</a>
1.294 david 905: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 906: There are printf-style format string bugs in several privileged
907: programs. (patch included)</a>
1.294 david 908: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 909: libcurses honored terminal descriptions in the $HOME/.terminfo
910: directory as well as in the TERMCAP environment variable for
911: setuid and setgid applications.
1.146 deraadt 912: (patch included)</a>
1.294 david 913: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 914: A format string vulnerability exists in talkd(8).
915: (patch included)</a>
1.294 david 916: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 917: A format string vulnerability exists in the pw_error() function of the
918: libutil library, yielding localhost root through chpass(1).
919: (patch included)</a>
1.294 david 920: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 921: Bad ESP/AH packets could cause a crash under certain conditions.
922: (patch included)</a>
1.294 david 923: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 924: A format string vulnerability (localhost root) exists in xlock(1).
925: (patch included)</a>
1.294 david 926: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 927: Various bugs found in X11 libraries have various side effects, almost
928: completely denial of service in OpenBSD.
929: (patch included)</a>
1.294 david 930: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 931: Just like pretty much all the other unix ftp daemons
932: on the planet, ftpd had a remote root hole in it.
933: Luckily, ftpd was not enabled by default.
1.137 deraadt 934: The problem exists if anonymous ftp is enabled.
1.136 deraadt 935: (patch included)</a>
1.294 david 936: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 937: Mopd, very rarely used, contained some buffer overflows.
938: (patch included)</a>
1.294 david 939: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 940: libedit would check for a <b>.editrc</b> file in the current
941: directory. Not known to be a real security issue, but a patch
942: is available anyways.
943: (patch included)</a>
1.294 david 944: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 945: A serious bug in dhclient(8) could allow strings from a
946: malicious dhcp server to be executed in the shell as root.
947: (patch included)</a>
1.294 david 948: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 949: A serious bug in isakmpd(8) policy handling wherein
950: policy verification could be completely bypassed in isakmpd.
951: (patch included)</a>
1.294 david 952: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 953: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
954: should not be used, and results in security problems on
955: other operating systems.</a>
1.294 david 956: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 957: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 958: (patch included)</a>
1.294 david 959: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 960: Improper use of ipf <i>keep-state</i> rules can result
961: in firewall rules being bypassed. (patch included)</a>
962:
1.124 deraadt 963: </ul>
964:
965: <p>
966: <li>
1.288 matthieu 967: <a name="26"></a>
1.119 deraadt 968:
1.294 david 969: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 970: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 971: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 972: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
973:
974: <p>
975: <ul>
1.294 david 976: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 977: SYSV semaphore support contained an undocumented system call
1.131 deraadt 978: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 979: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 980: Improper use of ipf <i>keep-state</i> rules can result
981: in firewall rules being bypassed. (patch included)</a>
1.294 david 982: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 983: xlockmore has a bug which a localhost attacker can use to gain
984: access to the encrypted root password hash (which is normally
1.245 miod 985: encoded using blowfish</a> (see
1.294 david 986: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 987: crypt(3)</a>)
1.245 miod 988: (patch included).
1.294 david 989: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 990: Systems running with procfs enabled and mounted are
991: vulnerable to a very tricky exploit. procfs is not
992: mounted by default.
993: (patch included).</a>
1.294 david 994: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 995: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 996: thus exposing the system to a race where the aliases file
997: did not exist.
1.119 deraadt 998: (patch included).</a>
1.294 david 999: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 1000: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 1001: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 1002: A buffer overflow in the RSAREF code included in the
1003: USA version of libssl, is possibly exploitable in
1004: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 1005: (patch included).<br></a>
1006: <strong>Update:</strong> Turns out that this was not exploitable
1007: in any of the software included in OpenBSD 2.6.
1.294 david 1008: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1009: Any user could change interface media configurations, resulting in
1010: a localhost denial of service attack.
1.121 deraadt 1011: (patch included).</a>
1.119 deraadt 1012: </ul>
1013:
1014: <p>
1015: <li>
1.288 matthieu 1016: <a name="25"></a>
1.106 deraadt 1017:
1.294 david 1018: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1019: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1020: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1021: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1022:
1.96 deraadt 1023: <p>
1.104 deraadt 1024: <ul>
1.294 david 1025: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1026: In cron(8), make sure argv[] is NULL terminated in the
1027: fake popen() and run sendmail as the user, not as root.
1028: (patch included).</a>
1.294 david 1029: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1030: filesystems had an overrun in their handling of uio_offset
1031: in their readdir() routines. (These filesystems are not
1032: enabled by default). (patch included).</a>
1.294 david 1033: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1034: when we execve() a new process. (patch included).</a>
1.294 david 1035: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1036: been handled by IPsec may be transmitted as cleartext.
1037: PF_KEY SA expirations may leak kernel resources.
1038: (patch included).</a>
1.294 david 1039: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1040: motd re-writing and change the find(1) to use -execdir
1041: (patch included).</a>
1.294 david 1042: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1043: users to chflags(2) or fchflags(2) on character or block devices
1044: which they may currently be the owner of (patch included).</a>
1.294 david 1045: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1046: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1047: </ul>
1048:
1.106 deraadt 1049: <p>
1050: <li>
1.288 matthieu 1051: <a name="24"></a>
1.235 miod 1052:
1.294 david 1053: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1054: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1055: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1056: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1057:
1.96 deraadt 1058: <p>
1.75 deraadt 1059: <ul>
1.294 david 1060: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1061: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1062: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1063: another kernel crash case caused by the <strong>crashme</strong>
1064: program (patch included).</a>
1.294 david 1065: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1066: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1067: (patch included).</a>
1.294 david 1068: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1069: existed in ping(8). (patch included).</a>
1.294 david 1070: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1071: the ipq, which could permit an attacker to cause a crash.
1072: (patch included).</a>
1.294 david 1073: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1074: kernel between accept(2) and select(2) could permit an attacker
1075: to hang sockets from remote.
1076: (patch included).</a>
1.294 david 1077: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1078: bog the machine excessively and cause problems.
1079: (patch included).</a>
1.294 david 1080: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1081: DDB interacted to possibly cause a crash.
1082: (patch included).</a>
1.294 david 1083: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1084: (patch included).</a>
1.294 david 1085: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1086: problem in bootpd(8). (patch included).</a>
1.294 david 1087: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1088: exploitable problem relating to environment variables in termcap
1089: and curses. (patch included).</a>
1.294 david 1090: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1091: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1092: </ul>
1093:
1.106 deraadt 1094: <p>
1095: <li>
1.288 matthieu 1096: <a name="23"></a>
1.235 miod 1097:
1.294 david 1098: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1099: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1100: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1101: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1102:
1.96 deraadt 1103: <p>
1.53 matthieu 1104: <ul>
1.294 david 1105: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1106: problem in bootpd(8). (patch included).</a>
1.294 david 1107: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1108: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1109: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1110: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1111: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1112: chpass(1) has a file descriptor leak which allows an
1113: attacker to modify /etc/master.passwd.</a>
1.294 david 1114: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1115: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1116: should not be executed with fd slots 0, 1, or 2 free.
1117: (patch included).</a>
1.294 david 1118: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1119: libraries (patches included).</a>
1.294 david 1120: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1121: processes too permissive (4th revision patch included).</a>
1.294 david 1122: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1123: of immutable and append-only file flags. (patch included).</a>
1.294 david 1124: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1125: if IPSEC is enabled (patch included).</a>
1.294 david 1126: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1127: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1128: </ul>
1.9 deraadt 1129:
1.106 deraadt 1130: <p>
1131: <li>
1.288 matthieu 1132: <a name="22"></a>
1.235 miod 1133:
1.294 david 1134: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1135: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1136: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1137: still exist in other operating systems. (The supplied patches are for
1138: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1139:
1.96 deraadt 1140: <p>
1.9 deraadt 1141: <ul>
1.294 david 1142: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1143: packets if IPSEC is enabled (patch included).</a>
1.294 david 1144: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1145: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1146: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1147: (patch included).</a>
1.294 david 1148: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1149: (patch included).</a>
1.294 david 1150: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1151: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1152: (patch included).</a>
1.294 david 1153: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1154: export (patch included).</a>
1.112 philen 1155: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1156: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1157: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1158: Acceptance.</a>
1.294 david 1159: A patch is available <a href="errata22.html#sourceroute">here</a>.
1160: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1161: flaw (patch included).</a>
1.294 david 1162: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1163: </ul>
1164:
1.106 deraadt 1165: <p>
1166: <li>
1.288 matthieu 1167: <a name="21"></a>
1.235 miod 1168:
1.294 david 1169: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1170: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1171: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1172: exist in other operating systems. (If you are running OpenBSD 2.1, we
1173: would strongly recommend an upgrade to the newest release, as this
1174: patch list only attempts at fixing the most important security
1175: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1176: security problems. Many of those problems were solved in ways which
1177: make it hard for us to provide patches).
1178:
1.96 deraadt 1179: <p>
1.52 deraadt 1180: <ul>
1.112 philen 1181: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1182: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1183: (patch included)</a>
1.112 philen 1184: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1185: </ul>
1.51 deraadt 1186:
1.106 deraadt 1187: <p>
1188: <li>
1.288 matthieu 1189: <a name="20"></a>
1.235 miod 1190:
1.294 david 1191: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1192: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1193: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1194: exist in other operating systems. (If you are running OpenBSD 2.0, we
1195: commend you for being there back in the old days!, but you're really
1196: missing out if you don't install a new version!)
1197:
1198: <p>
1199: <ul>
1.112 philen 1200: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1201: resolver (patch included)</a>
1202: <li>Many others... if people can hunt them down, please let me know
1203: and we'll put them up here.
1204: </ul>
1.51 deraadt 1205: <p>
1.106 deraadt 1206:
1.288 matthieu 1207: <a name="watching"></a>
1.294 david 1208: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1209:
1.21 deraadt 1210: Since we take a proactive stance with security, we are continually
1211: finding and fixing new security problems. Not all of these problems
1.80 espie 1212: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1213: confirmed to be exploitable; many simple bugs we fix do turn out to
1214: have security consequences we could not predict. We do not have the
1215: time resources to make these changes available in the above format.<p>
1.21 deraadt 1216:
1217: Thus there are usually minor security fixes in the current source code
1218: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1219: guarantee that these problems are of minimal impact and unproven
1.44 ian 1220: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1221: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1222:
1.45 deraadt 1223: People who are really concerned with security can do a number of
1224: things:<p>
1.21 deraadt 1225:
1226: <ul>
1227: <li>If you understand security issues, watch our
1.294 david 1228: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1229: eye out for things which appear security related. Since
1.21 deraadt 1230: exploitability is not proven for many of the fixes we make,
1231: do not expect the relevant commit message to say "SECURITY FIX!".
1232: If a problem is proven and serious, a patch will be available
1233: here very shortly after.
1.161 horacio 1234: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1235: security-announce mailing list</a> which will notify you for every
1.186 ian 1236: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1237: and instruct you on how to patch the problem.
1.21 deraadt 1238: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1239: complete system build from time to time (read /usr/src/Makefile
1240: carefully). Users can make the assumption that the current
1241: source tree always has stronger security than the previous release.
1.45 deraadt 1242: However, building your own system from source code is not trivial;
1.265 miod 1243: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1244: transition between major releases.
1.115 ericj 1245: <li>Install a binary snapshot for your
1.80 espie 1246: architecture, which are made available fairly often. For
1.29 deraadt 1247: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1248: </ul>
1249:
1.9 deraadt 1250: <p>
1.288 matthieu 1251: <a name="reporting"></a>
1.294 david 1252: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1253:
1.5 deraadt 1254: <p> If you find a new security problem, you can mail it to
1.294 david 1255: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1256: <br>
1.5 deraadt 1257: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1258: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1259:
1.107 deraadt 1260: <p>
1.288 matthieu 1261: <a name="papers"></a>
1.294 david 1262: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1263:
1264: A number of papers have been written by OpenBSD team members, about security
1265: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1266: documents are available as follows.<p>
1.107 deraadt 1267:
1268: <ul>
1.113 deraadt 1269: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1270: <a href="events.html#usenix99">Usenix 1999</a>,
1271: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1272: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1273: <a href="papers/bcrypt-paper.ps">paper</a> and
1274: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1275: <p>
1276: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1277: <a href="events.html#usenix99">Usenix 1999</a>,
1278: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1279: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1280: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1281: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1282: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1283: <a href="papers/crypt-paper.ps">paper</a> and
1284: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1285: <p>
1286: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1287: <a href="events.html#usenix99">Usenix 1999</a>,
1288: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1289: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1290: <a href="papers/strlcpy-paper.ps">paper</a> and
1291: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1292: <p>
1.118 deraadt 1293: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1294: <a href="events.html#lisa99">LISA 1999</a>,
1295: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1296: <a href="papers/authgw-paper.ps">paper</a> and
1297: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1298: <p>
1.153 jufi 1299: <li>Encrypting Virtual Memory<br>
1.294 david 1300: <a href="events.html#sec2000">Usenix Security 2000</a>,
1301: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1302: <a href="papers/swapencrypt.ps">paper</a> and
1303: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1304: <p>
1.107 deraadt 1305: </ul>
1.294 david 1306: </ul>
1.106 deraadt 1307:
1.2 deraadt 1308: <hr>
1.294 david 1309: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1310: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1311: <br>
1.305 ! brad 1312: <small>$OpenBSD: security.html,v 1.304 2005/01/12 15:08:02 brad Exp $</small>
1.1 deraadt 1313:
1.24 deraadt 1314: </body>
1315: </html>
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