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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>
232: <li><a href="errata.html#pfkey">Dec 14, 2004:
233: On systems running isakmpd(8) it is possible for a local
234: user to cause kernel memory corruption and system panic by
1.303 ! markus 235: setting ipsec(4) credentials on a socket.</a>
1.302 markus 236: </ul>
1.301 miod 237:
238: <p>
239: <li>
1.288 matthieu 240: <a name="35"></a>
1.279 deraadt 241:
1.294 david 242: <h3><font color="#e00000">OpenBSD 3.5 Security Advisories</font></h3>
1.279 deraadt 243: These are the OpenBSD 3.5 advisories -- all these problems are solved
244: in <a href=anoncvs.html>OpenBSD current</a> and the
245: <a href=stable.html>patch branch</a>.
246:
247: <p>
248: <ul>
1.302 markus 249: <li><a href="errata35.html#pfkey">Dec 14, 2004:
250: On systems running isakmpd(8) it is possible for a local
251: user to cause kernel memory corruption and system panic by
1.303 ! markus 252: setting ipsec(4) credentials on a socket.</a>
1.301 miod 253: <li><a href="errata35.html#radius">Sep 20, 2004:
1.299 millert 254: Radius-based authentication is vulnerable to spoofed replies.</a>
1.301 miod 255: <li><a href="errata35.html#xpm">Sep 16, 2004:
1.298 brad 256: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.301 miod 257: <li><a href="errata35.html#httpd2"> Sep 10, 2004:
1.297 brad 258: httpd(8)'s mod_rewrite module can be made to write one zero byte in
259: an arbitrary memory position outside of a char array, causing a DoS
260: or possibly buffer overflows.</a>
1.301 miod 261: <li><a href="errata35.html#httpd"> Jun 12, 2004:
1.300 deraadt 262: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.301 miod 263: <li><a href="errata35.html#isakmpd"> Jun 10, 2004:
1.291 hshoexer 264: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 265: an attacker can delete IPsec tunnels at will.</a>
1.301 miod 266: <li><a href="errata35.html#cvs3"> Jun 9, 2004:
1.290 millert 267: Multiple remote vulnerabilities have been found in the cvs(1)
268: server which can be used by CVS clients to crash or execute
1.293 brad 269: arbitrary code on the server.</a>
1.301 miod 270: <li><a href="errata35.html#kerberos"> May 30, 2004:
1.289 beck 271: kdc(8) performs inadequate checking of request fields, leading
272: to the possibility of principal impersonation from other
273: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.301 miod 274: <li><a href="errata35.html#xdm"> May 26, 2004:
1.287 matthieu 275: xdm(1) ignores the requestPort resource and creates a
1.293 brad 276: listening socket regardless of the setting in xdm-config.</a>
1.301 miod 277: <li><a href="errata35.html#cvs2"> May 20, 2004:
1.286 otto 278: A buffer overflow in the cvs(1) server has been found,
279: which can be used by CVS clients to execute arbitrary code on
1.293 brad 280: the server.</a>
1.301 miod 281: <li><a href="errata35.html#procfs"> May 13, 2004:
1.282 tedu 282: Integer overflow problems were found in procfs, allowing
1.293 brad 283: reading of arbitrary kernel memory.</a>
1.301 miod 284: <li><a href="errata35.html#cvs"> May 5, 2004:
1.281 otto 285: Pathname validation problems have been found in cvs(1),
286: allowing clients and servers access to files outside the
1.293 brad 287: repository or local CVS tree.</a>
1.279 deraadt 288: </ul>
289:
290: <p>
1.301 miod 291: OpenBSD 3.4 and earlier releases are not supported anymore. The following
292: paragraphs only list advisories issued while they were maintained; these
293: releases are likely to be affected by the advisories for more recent releases.
294: <br>
295:
1.279 deraadt 296: <li>
1.288 matthieu 297: <a name="34"></a>
1.261 david 298:
1.294 david 299: <h3><font color="#e00000">OpenBSD 3.4 Security Advisories</font></h3>
1.261 david 300: These are the OpenBSD 3.4 advisories -- all these problems are solved
1.301 miod 301: in <a href="anoncvs.html">OpenBSD current</a>. The
302: <a href="stable.html">patch branch</a> for 3.4 is no longer being maintained,
303: you should update your machine.
1.261 david 304: <p>
305: <ul>
1.302 markus 306: <li><a href="errata34.html#pfkey">Dec 14, 2004:
307: On systems running isakmpd(8) it is possible for a local
308: user to cause kernel memory corruption and system panic by
1.303 ! markus 309: setting ipsec(4) credentials on a socket.</a>
1.298 brad 310: <li><a href="errata34.html#xpm">Sep 16, 2004:
311: The Xpm library has vulnerabilities when parsing malicious images.</a>
1.297 brad 312: <li><a href="errata34.html#httpd4"> Sep 10, 2004:
313: httpd(8)'s mod_rewrite module can be made to write one zero byte in
314: an arbitrary memory position outside of a char array, causing a DoS
315: or possibly buffer overflows.</a>
1.294 david 316: <li><a href="errata34.html#httpd3"> Jun 12, 2004:
1.300 deraadt 317: Multiple vulnerabilities have been found in httpd(8) / mod_ssl.</a>
1.294 david 318: <li><a href="errata34.html#isakmpd3"> Jun 10, 2004:
1.292 brad 319: isakmpd(8) still has issues with unauthorized SA deletion,
1.293 brad 320: an attacker can delete IPsec tunnels at will.</a>
1.294 david 321: <li><a href="errata34.html#cvs3"> Jun 9, 2004:
1.290 millert 322: Multiple remote vulnerabilities have been found in the cvs(1)
323: server which can be used by CVS clients to crash or execute
1.293 brad 324: arbitrary code on the server.</a>
1.294 david 325: <li><a href="errata34.html#kerberos"> May 30, 2004:
1.289 beck 326: kdc(8) performs inadequate checking of request fields, leading
327: to the possibility of principal impersonation from other
328: Kerberos realms if they are trusted with a cross-realm trust.</a>
1.294 david 329: <li><a href="errata34.html#cvs2"> May 20, 2004:
1.286 otto 330: A buffer overflow in the cvs(1) server has been found,
331: which can be used by CVS clients to execute arbitrary code on
332: the server.</a>
1.294 david 333: <li><a href="errata34.html#procfs"> May 13, 2004:
1.282 tedu 334: Integer overflow problems were found in procfs, allowing
335: reading of arbitrary kernel memory.</a>
1.294 david 336: <li><a href="errata34.html#cvs"> May 5, 2004:
1.281 otto 337: Pathname validation problems have been found in cvs(1),
338: allowing clients and servers access to files outside the
339: repository or local CVS tree.</a>
1.294 david 340: <li><a href="errata34.html#openssl"> March 17, 2004:
1.277 millert 341: A missing check for a NULL-pointer dereference may allow a
1.281 otto 342: remote attacker to crash applications using OpenSSL.</a>
1.294 david 343: <li><a href="errata34.html#isakmpd2"> March 17, 2004:
1.276 brad 344: Defects in the payload validation and processing functions of
345: isakmpd have been discovered. An attacker could send malformed
346: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 347: <li><a href="errata34.html#httpd2"> March 13, 2004:
1.275 brad 348: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
349: access module, using IP addresses without a netmask on big endian
350: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 351: <li><a href="errata34.html#ip6"> February 8, 2004:
1.272 dhartmei 352: An IPv6 MTU handling problem exists that could be used by an
353: attacker to cause a denial of service attack.</a>
1.294 david 354: <li><a href="errata34.html#sysvshm"> February 5, 2004:
1.271 millert 355: A reference counting bug in shmat(2) could be used to write to
356: kernel memory under certain circumstances.</a>
1.294 david 357: <li><a href="errata34.html#isakmpd">January 13, 2004:
1.266 brad 358: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 359: by Thomas Walpuski.</a>
1.294 david 360: <li><a href="errata34.html#ibcs2">November 17, 2003:
1.264 henning 361: It may be possible for a local user to overrun the stack in
362: compat_ibcs2(8) and cause a kernel panic.</a>
1.294 david 363: <li><a href="errata34.html#asn1">November 1, 2003:
1.262 margarid 364: The use of certain ASN.1 encodings or malformed public keys may
365: allow an attacker to mount a denial of service attack against
366: applications linked with ssl(3).</a>
1.261 david 367: </ul>
368:
369: <li>
1.288 matthieu 370: <a name="33"></a>
1.246 deraadt 371:
1.294 david 372: <h3><font color="#e00000">OpenBSD 3.3 Security Advisories</font></h3>
1.246 deraadt 373: These are the OpenBSD 3.3 advisories -- all these problems are solved
1.294 david 374: in <a href="anoncvs.html">OpenBSD current</a>. The
375: <a href="stable.html">patch branch</a> for 3.3 is no longer being maintained,
1.284 otto 376: you should update your machine.
1.246 deraadt 377: <p>
378: <ul>
1.294 david 379: <li><a href="errata33.html#cvs"> May 5, 2004:
1.281 otto 380: Pathname validation problems have been found in cvs(1),
381: allowing clients and servers access to files outside the
382: repository or local CVS tree.</a>
1.294 david 383: <li><a href="errata33.html#openssl"> March 17, 2004:
1.277 millert 384: A missing check for a NULL-pointer dereference may allow a
1.281 otto 385: remote attacker to crash applications using OpenSSL.</a>
1.294 david 386: <li><a href="errata33.html#isakmpd2"> March 17, 2004:
1.276 brad 387: Defects in the payload validation and processing functions of
388: isakmpd have been discovered. An attacker could send malformed
389: ISAKMP messages and cause isakmpd to crash or to loop endlessly.</a>
1.294 david 390: <li><a href="errata33.html#httpd2"> March 13, 2004:
1.275 brad 391: Due to a bug in the parsing of Allow/Deny rules for httpd(8)'s
392: access module, using IP addresses without a netmask on big endian
393: 64-bit platforms causes the rules to fail to match.</a>
1.294 david 394: <li><a href="errata33.html#ip6"> February 8, 2004:
1.275 brad 395: An IPv6 MTU handling problem exists that could be used by an
396: attacker to cause a denial of service attack.</a>
1.294 david 397: <li><a href="errata33.html#sysvshm"> February 5, 2004:
1.271 millert 398: A reference counting bug in shmat(2) could be used to write to
399: kernel memory under certain circumstances.</a>
1.294 david 400: <li><a href="errata33.html#isakmpd">January 15, 2004:
1.268 brad 401: Several message handling flaws in isakmpd(8) have been reported
1.271 millert 402: by Thomas Walpuski.</a>
1.294 david 403: <li><a href="errata33.html#ibcs2">November 17, 2003:
1.264 henning 404: It may be possible for a local user to execute arbitrary code
405: resulting in escalation of privileges due to a stack overrun
406: in compat_ibcs2(8).</a>
1.294 david 407: <li><a href="errata33.html#asn1">October 1, 2003:
1.257 millert 408: The use of certain ASN.1 encodings or malformed public keys may
409: allow an attacker to mount a denial of service attack against
410: applications linked with ssl(3).</a>
1.294 david 411: <li><a href="errata33.html#pfnorm">September 24, 2003:
1.258 beck 412: Access of freed memory in pf(4) could be used to
1.260 margarid 413: remotely panic a machine using scrub rules.</a>
1.294 david 414: <li><a href="errata33.html#sendmail">September 17, 2003:
1.256 millert 415: A buffer overflow in the address parsing in
416: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 417: <li><a href="errata33.html#sshbuffer">September 16, 2003:
1.255 millert 418: OpenSSH versions prior to 3.7 contains a buffer management error
419: that is potentially exploitable.</a>
1.294 david 420: <li><a href="errata33.html#sysvsem">September 10, 2003:
1.254 millert 421: Root may be able to reduce the security level by taking advantage of
422: an integer overflow when the semaphore limits are made very large.</a>
1.294 david 423: <li><a href="errata33.html#semget">August 20, 2003:
1.252 millert 424: An improper bounds check in the kernel may allow a local user
425: to panic the kernel.</a>
1.294 david 426: <li><a href="errata33.html#realpath">August 4, 2003:
1.249 millert 427: An off-by-one error exists in the C library function realpath(3)
428: may allow an attacker to gain escalated privileges.</a>
1.246 deraadt 429: </ul>
430:
1.265 miod 431:
1.247 david 432: <p>
1.246 deraadt 433: <li>
1.288 matthieu 434: <a name="32"></a>
1.224 deraadt 435:
1.294 david 436: <h3><font color="#e00000">OpenBSD 3.2 Security Advisories</font></h3>
1.224 deraadt 437: These are the OpenBSD 3.2 advisories -- all these problems are solved
1.294 david 438: in <a href="anoncvs.html">OpenBSD current</a>. The
439: <a href="stable.html">patch branch</a> for 3.2 is no longer being maintained,
1.265 miod 440: you should update your machine.
1.224 deraadt 441: <p>
442: <ul>
1.294 david 443: <li><a href="errata32.html#asn1">October 1, 2003:
1.257 millert 444: The use of certain ASN.1 encodings or malformed public keys may
445: allow an attacker to mount a denial of service attack against
446: applications linked with ssl(3). This does not affect OpenSSH.</a>
1.294 david 447: <li><a href="errata32.html#pfnorm">September 24, 2003:
1.258 beck 448: Access of freed memory in pf(4) could be used to
1.260 margarid 449: remotely panic a machine using scrub rules.</a>
1.294 david 450: <li><a href="errata32.html#sendmail4">September 17, 2003:
1.256 millert 451: A buffer overflow in the address parsing in
452: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 453: <li><a href="errata32.html#sshbuffer">September 16, 2003:
1.255 millert 454: OpenSSH versions prior to 3.7 contains a buffer management error
455: that is potentially exploitable.</a>
1.294 david 456: <li><a href="errata32.html#sendmail3">August 25, 2003:
1.253 brad 457: Fix for a potential security issue in
458: sendmail(8) with respect to DNS maps.</a>
1.294 david 459: <li><a href="errata32.html#realpath">August 4, 2003:
1.249 millert 460: An off-by-one error exists in the C library function realpath(3)
461: may allow an attacker to gain escalated privileges.</a>
1.294 david 462: <li><a href="errata32.html#sendmail2">March 31, 2003:
1.244 miod 463: A buffer overflow in the address parsing in
464: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 465: <li><a href="errata32.html#kerberos">March 24, 2003:
1.242 millert 466: A cryptographic weaknesses in the Kerberos v4 protocol can be
467: exploited on Kerberos v5 as well.</a>
1.294 david 468: <li><a href="errata32.html#kpr">March 19, 2003:
1.241 jufi 469: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 470: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 471: <li><a href="errata32.html#blinding">March 18, 2003:
1.239 miod 472: Various SSL and TLS operations in OpenSSL are vulnerable to
473: timing attacks.</a>
1.294 david 474: <li><a href="errata32.html#lprm">March 5, 2003:
1.238 millert 475: A buffer overflow in lprm(1) may allow an attacker to elevate
476: privileges to user daemon.</a>.
1.294 david 477: <li><a href="errata32.html#sendmail">March 3, 2003:
1.237 miod 478: A buffer overflow in the envelope comments processing in
479: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 480: <li><a href="errata32.html#httpd">February 25, 2003:
1.236 margarid 481: httpd(8) leaks file inode numbers via ETag header as well as
482: child PIDs in multipart MIME boundary generation. This could
483: lead, for example, to NFS exploitation because it uses inode
484: numbers as part of the file handle.</a>
1.294 david 485: <li><a href="errata32.html#ssl">February 22, 2003:
1.234 margarid 486: In ssl(8) an information leak can occur via timing by performing
487: a MAC computation even if incorrect block cipher padding has
488: been found, this is a countermeasure. Also, check for negative
489: sizes, in allocation routines.</a>
1.294 david 490: <li><a href="errata32.html#cvs">January 20, 2003:
1.232 millert 491: A double free exists in cvs(1) that could lead to privilege
492: escalation for cvs configurations where the cvs command is
1.233 margarid 493: run as a privileged user.</a>
1.294 david 494: <li><a href="errata32.html#named">November 14, 2002:
1.230 millert 495: A buffer overflow exists in named(8) that could lead to a
496: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 497: <li><a href="errata32.html#pool">November 6, 2002:
1.233 margarid 498: A logic error in the pool kernel memory allocator could cause
499: memory corruption in low-memory situations, causing the system
500: to crash.</a>
1.294 david 501: <li><a href="errata32.html#smrsh">November 6, 2002:
1.229 miod 502: An attacker can bypass smrsh(8)'s restrictions and execute
503: arbitrary commands with the privileges of his own account.</a>
1.294 david 504: <li><a href="errata32.html#pfbridge">November 6, 2002:
1.233 margarid 505: Network bridges running pf with scrubbing enabled could cause
506: mbuf corruption, causing the system to crash.</a>
1.294 david 507: <li><a href="errata32.html#kadmin">October 21, 2002:
1.228 miod 508: A buffer overflow can occur in the kadmind(8) daemon, leading
509: to possible remote crash or exploit.</a>
1.224 deraadt 510: </ul>
511:
1.227 miod 512: <p>
513: <li>
1.288 matthieu 514: <a name="31"></a>
1.203 deraadt 515:
1.294 david 516: <h3><font color="#e00000">OpenBSD 3.1 Security Advisories</font></h3>
1.203 deraadt 517: These are the OpenBSD 3.1 advisories -- all these problems are solved
1.294 david 518: in <a href="anoncvs.html">OpenBSD current</a>. The
519: <a href="stable.html">patch branch</a> for 3.1 is no longer being maintained,
1.258 beck 520: you should update your machine.
1.203 deraadt 521:
522: <p>
523: <ul>
1.294 david 524: <li><a href="errata31.html#sendmail2">March 31, 2003:
1.244 miod 525: A buffer overflow in the address parsing in
526: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 527: <li><a href="errata31.html#kerberos">March 24, 2003:
1.242 millert 528: A cryptographic weaknesses in the Kerberos v4 protocol can be
529: exploited on Kerberos v5 as well.</a>
1.294 david 530: <li><a href="errata31.html#kpr">March 19, 2003:
1.241 jufi 531: OpenSSL is vulnerable to an extension of the ``Bleichenbacher'' attack
1.240 miod 532: designed by Czech researchers Klima, Pokorny and Rosa.</a>
1.294 david 533: <li><a href="errata31.html#blinding">March 18, 2003:
1.239 miod 534: Various SSL and TLS operations in OpenSSL are vulnerable to
535: timing attacks.</a>
1.294 david 536: <li><a href="errata31.html#lprm">March 4, 2003:
1.238 millert 537: A buffer overflow in lprm(1) may allow an attacker to gain
538: root privileges.</a>
1.294 david 539: <li><a href="errata31.html#sendmail">March 3, 2003:
1.237 miod 540: A buffer overflow in the envelope comments processing in
541: sendmail(8) may allow an attacker to gain root privileges.</a>
1.294 david 542: <li><a href="errata31.html#ssl2">February 23, 2003:
1.235 miod 543: In ssl(8) an information leak can occur via timing by performing
544: a MAC computation even if incorrect block cipher padding has
545: been found, this is a countermeasure. Also, check for negative
546: sizes, in allocation routines.</a>
1.294 david 547: <li><a href="errata31.html#cvs">January 20, 2003:
1.232 millert 548: A double free exists in cvs(1) that could lead to privilege
549: escalation for cvs configurations where the cvs command is
1.294 david 550: run as a privileged user</a>.
551: <li><a href="errata31.html#named">November 14, 2002:
1.230 millert 552: A buffer overflow exists in named(8) that could lead to a
553: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 554: <li><a href="errata31.html#kernresource">November 6, 2002:
1.229 miod 555: Incorrect argument checking in the getitimer(2) system call
556: may allow an attacker to crash the system.</a>
1.294 david 557: <li><a href="errata31.html#smrsh">November 6, 2002:
1.229 miod 558: An attacker can bypass smrsh(8)'s restrictions and execute
559: arbitrary commands with the privileges of his own account.</a>
1.294 david 560: <li><a href="errata31.html#kadmin">October 21, 2002:
1.226 miod 561: A buffer overflow can occur in the kadmind(8) daemon, leading
562: to possible remote crash or exploit.</a>
1.294 david 563: <li><a href="errata31.html#kerntime">October 2, 2002:
1.222 jason 564: Incorrect argument checking in the setitimer(2) system call
565: may allow an attacker to write to kernel memory.</a>
1.294 david 566: <li><a href="errata31.html#scarg">August 11, 2002:
1.221 provos 567: An insufficient boundary check in the select system call
1.220 miod 568: allows an attacker to overwrite kernel memory and execute arbitrary code
569: in kernel context.</a>
1.294 david 570: <li><a href="errata31.html#ssl">July 30, 2002:
1.218 miod 571: Several remote buffer overflows can occur in the SSL2 server and SSL3
572: client of the ssl(8) library, as in the ASN.1 parser code in the
573: crypto(3) library, all of them being potentially remotely
574: exploitable.</a>
1.294 david 575: <li><a href="errata31.html#xdr">July 29, 2002:
1.218 miod 576: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
577: possible remote crash.</a>
1.294 david 578: <li><a href="errata31.html#pppd">July 29, 2002:
1.218 miod 579: A race condition exists in the pppd(8) daemon which may cause it to
580: alter the file permissions of an arbitrary file.</a>
1.294 david 581: <li><a href="errata31.html#isakmpd">July 5, 2002:
1.218 miod 582: Receiving IKE payloads out of sequence can cause isakmpd(8) to
583: crash.</a>
1.294 david 584: <li><a href="errata31.html#ktrace">June 27, 2002:
1.215 miod 585: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 586: <li><a href="errata31.html#modssl">June 26, 2002:
1.213 miod 587: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 588: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 589: <li><a href="errata31.html#resolver">June 25, 2002:
1.212 millert 590: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 591: <li><a href="errata31.html#sshd">June 24, 2002:
1.216 deraadt 592: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 593: input validation error that can result in an integer overflow and
594: privilege escalation.</a>
1.294 david 595: <li><a href="errata31.html#httpd">June 19, 2002:
1.211 miod 596: A buffer overflow can occur during the interpretation of chunked
597: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 598: <li><a href="errata31.html#sshbsdauth">May 22, 2002:
1.209 markus 599: Under certain conditions, on systems using YP with netgroups
600: in the password database, it is possible that sshd(8) does
601: ACL checks for the requested user name but uses the password
602: database entry of a different user for authentication. This
603: means that denied users might authenticate successfully
604: while permitted users could be locked out.</a>
1.294 david 605: <li><a href="errata31.html#fdalloc2">May 8, 2002:
1.208 millert 606: A race condition exists that could defeat the kernel's
607: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 608: <li><a href="errata31.html#sudo">April 25, 2002:
1.205 millert 609: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 610: <li><a href="errata31.html#sshafs">April 22, 2002:
1.205 millert 611: A local user can gain super-user privileges due to a buffer
612: overflow in sshd(8) if AFS has been configured on the system
613: or if KerberosTgtPassing or AFSTokenPassing has been enabled
614: in the sshd_config file.</a>
1.203 deraadt 615: </ul>
616:
1.235 miod 617: <p>
1.203 deraadt 618: <li>
1.288 matthieu 619: <a name="30"></a>
1.187 deraadt 620:
1.294 david 621: <h3><font color="#e00000">OpenBSD 3.0 Security Advisories</font></h3>
1.187 deraadt 622: These are the OpenBSD 3.0 advisories -- all these problems are solved
1.294 david 623: in <a href="anoncvs.html">OpenBSD current</a>. The
624: <a href="stable.html">patch branch</a> for 3.0 is no longer being maintained,
1.258 beck 625: you should update your machine.
1.187 deraadt 626:
627: <p>
628: <ul>
1.294 david 629: <li><a href="errata30.html#named">November 14, 2002:
1.230 millert 630: A buffer overflow exists in named(8) that could lead to a
631: remote crash or code execution as user named in a chroot jail.</a>
1.294 david 632: <li><a href="errata30.html#kernresource">November 6, 2002:
1.229 miod 633: Incorrect argument checking in the getitimer(2) system call
634: may allow an attacker to crash the system.</a>
1.294 david 635: <li><a href="errata30.html#smrsh">November 6, 2002:
1.229 miod 636: An attacker can bypass smrsh(8)'s restrictions and execute
637: arbitrary commands with the privileges of his own account.</a>
1.294 david 638: <li><a href="errata30.html#kadmin">October 21, 2002:
1.226 miod 639: A buffer overflow can occur in the kadmind(8) daemon, leading
640: to possible remote crash or exploit.</a>
1.294 david 641: <li><a href="errata30.html#kerntime">October 7, 2002:
1.223 miod 642: Incorrect argument checking in the setitimer(2) system call
643: may allow an attacker to write to kernel memory.</a>
1.294 david 644: <li><a href="errata30.html#scarg">August 11, 2002:
1.220 miod 645: An insufficient boundary check in the select and poll system calls
646: allows an attacker to overwrite kernel memory and execute arbitrary code
647: in kernel context.</a>
1.294 david 648: <li><a href="errata30.html#ssl">July 30, 2002:
1.218 miod 649: Several remote buffer overflows can occur in the SSL2 server and SSL3
650: client of the ssl(8) library, as in the ASN.1 parser code in the
651: crypto(3) library, all of them being potentially remotely
652: exploitable.</a>
1.294 david 653: <li><a href="errata30.html#xdr">July 29, 2002:
1.218 miod 654: A buffer overflow can occur in the xdr_array(3) RPC code, leading to
655: possible remote crash.</a>
1.294 david 656: <li><a href="errata30.html#pppd">July 29, 2002:
1.218 miod 657: A race condition exists in the pppd(8) daemon which may cause it to
658: alter the file permissions of an arbitrary file.</a>
1.294 david 659: <li><a href="errata30.html#isakmpd2">July 5, 2002:
1.218 miod 660: Receiving IKE payloads out of sequence can cause isakmpd(8) to
661: crash.</a>
1.294 david 662: <li><a href="errata30.html#ktrace">June 27, 2002:
1.215 miod 663: The kernel would let any user ktrace set[ug]id processes.</a>
1.294 david 664: <li><a href="errata30.html#resolver">June 25, 2002:
1.212 millert 665: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 666: <li><a href="errata30.html#sshdauth">June 24, 2002:
1.216 deraadt 667: All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an
1.213 miod 668: input validation error that can result in an integer overflow and
669: privilege escalation.</a>
1.294 david 670: <li><a href="errata30.html#modssl">June 24, 2002:
1.213 miod 671: A buffer overflow can occur in the .htaccess parsing code in
1.214 miod 672: mod_ssl httpd module, leading to possible remote crash or exploit.</a>
1.294 david 673: <li><a href="errata30.html#httpd">June 19, 2002:
1.213 miod 674: A buffer overflow can occur during the interpretation of chunked
675: encoding in httpd(8), leading to possible remote crash.</a>
1.294 david 676: <li><a href="errata30.html#fdalloc2">May 8, 2002:
1.208 millert 677: A race condition exists that could defeat the kernel's
678: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 679: <li><a href="errata30.html#sudo2">April 25, 2002:
1.205 millert 680: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 681: <li><a href="errata30.html#sshafs">April 22, 2002:
1.205 millert 682: A local user can gain super-user privileges due to a buffer
683: overflow in sshd(8) if AFS has been configured on the system
684: or if KerberosTgtPassing or AFSTokenPassing has been enabled
685: in the sshd_config file.</a>
1.294 david 686: <li><a href="errata30.html#mail">April 11, 2002:
1.202 millert 687: The mail(1) was interpreting tilde escapes even when invoked
688: in non-interactive mode. As mail(1) is called as root from cron,
689: this can lead to a local root compromise.</a>
1.294 david 690: <li><a href="errata30.html#approval">March 19, 2002:
1.201 millert 691: Under certain conditions, on systems using YP with netgroups in
692: the password database, it is possible for the rexecd(8) and rshd(8)
693: daemons to execute a shell from a password database entry for a
694: different user. Similarly, atrun(8) may change to the wrong
695: home directory when running jobs.</a>
1.294 david 696: <li><a href="errata30.html#zlib">March 13, 2002:
1.200 millert 697: A potential double free() exists in the zlib library;
698: this is not exploitable on OpenBSD.
699: The kernel also contains a copy of zlib; it is not
700: currently known if the kernel zlib is exploitable.</a>
1.294 david 701: <li><a href="errata30.html#openssh">March 8, 2002:
1.198 millert 702: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 703: may allow a local user to gain super-user privileges.</a>
1.294 david 704: <li><a href="errata30.html#ptrace">January 21, 2002:
1.192 jason 705: A race condition between the ptrace(2) and execve(2) system calls
706: allows an attacker to modify the memory contents of suid/sgid
707: processes which could lead to compromise of the super-user account.</a>
1.294 david 708: <li><a href="errata30.html#sudo">January 17, 2002:
1.191 millert 709: There is a security hole in sudo(8) that can be exploited
710: when the Postfix sendmail replacement is installed that may
711: allow an attacker on the local host to gain root privileges.</a>
1.294 david 712: <li><a href="errata30.html#lpd">November 28, 2001:
1.189 millert 713: An attacker can trick a machine running the lpd daemon into
714: creating new files in the root directory from a machine with
715: remote line printer access.</a>
1.294 david 716: <li><a href="errata30.html#vi.recover">November 13, 2001:
1.188 millert 717: The vi.recover script can be abused in such a way as
718: to cause arbitrary zero-length files to be removed.</a>
1.294 david 719: <li><a href="errata30.html#pf">November 13, 2001:
1.190 mpech 720: pf(4) was incapable of dealing with certain ipv6 icmp packets,
721: resulting in a crash.</a>
1.294 david 722: <li><a href="errata30.html#sshd">November 12, 2001:
1.190 mpech 723: A security hole that may allow an attacker to partially authenticate
724: if -- and only if -- the administrator has enabled KerberosV.</a>
1.187 deraadt 725: </ul>
726:
727: <p>
728: <li>
1.288 matthieu 729: <a name="29"></a>
1.173 deraadt 730:
1.294 david 731: <h3><font color="#e00000">OpenBSD 2.9 Security Advisories</font></h3>
1.173 deraadt 732: These are the OpenBSD 2.9 advisories -- all these problems are solved
1.294 david 733: in <a href="anoncvs.html">OpenBSD current</a>. The
734: <a href="stable.html">patch branch</a>. for 2.9 is no longer being maintained,
1.258 beck 735: you should update your machine.
736:
1.173 deraadt 737:
738: <p>
739: <ul>
1.294 david 740: <li><a href="errata29.html#resolver">June 25, 2002:
1.212 millert 741: A potential buffer overflow in the DNS resolver has been found.</a>
1.294 david 742: <li><a href="errata29.html#fdalloc2">May 8, 2002:
1.208 millert 743: A race condition exists that could defeat the kernel's
744: protection of fd slots 0-2 for setuid processes.</a>
1.294 david 745: <li><a href="errata29.html#sudo2">April 25, 2002:
1.207 millert 746: A bug in sudo may allow an attacker to corrupt the heap.</a>
1.294 david 747: <li><a href="errata29.html#sshafs">April 22, 2002:
1.206 millert 748: A local user can gain super-user privileges due to a buffer
749: overflow in sshd(8) if AFS has been configured on the system
750: or if KerberosTgtPassing or AFSTokenPassing has been enabled
751: in the sshd_config file.</a>
1.294 david 752: <li><a href="errata29.html#mail">April 11, 2002:
1.202 millert 753: The mail(1) was interpreting tilde escapes even when invoked
754: in non-interactive mode. As mail(1) is called as root from cron,
755: this can lead to a local root compromise.</a>
1.294 david 756: <li><a href="errata29.html#zlib">March 13, 2002:
1.200 millert 757: A potential double free() exists in the zlib library;
758: this is not exploitable on OpenBSD.
759: The kernel also contains a copy of zlib; it is not
760: currently known if the kernel zlib is exploitable.</a>
1.294 david 761: <li><a href="errata29.html#openssh">March 8, 2002:
1.198 millert 762: An off-by-one check in OpenSSH's channel forwarding code
1.199 jufi 763: may allow a local user to gain super-user privileges.</a>
1.294 david 764: <li><a href="errata29.html#ptrace">January 21, 2002:
1.198 millert 765: A race condition between the ptrace(2) and execve(2) system calls
766: allows an attacker to modify the memory contents of suid/sgid
767: processes which could lead to compromise of the super-user account.</a>
1.294 david 768: <li><a href="errata29.html#sudo">January 17, 2002:
1.191 millert 769: There is a security hole in sudo(8) that can be exploited
770: when the Postfix sendmail replacement is installed that may
771: allow an attacker on the local host to gain root privileges.</a>
1.294 david 772: <li><a href="errata29.html#lpd2">November 28, 2001:
1.189 millert 773: An attacker can trick a machine running the lpd daemon into
774: creating new files in the root directory from a machine with
775: remote line printer access.</a>
1.294 david 776: <li><a href="errata29.html#vi.recover">November 13, 2001:
1.190 mpech 777: The vi.recover script can be abused in such a way as
778: to cause arbitrary zero-length files to be removed.</a>
1.294 david 779: <li><a href="errata29.html#uucp">September 11, 2001:
1.184 millert 780: A security hole exists in uuxqt(8) that may allow an
781: attacker to gain root privileges.</a>
1.294 david 782: <li><a href="errata29.html#lpd">August 29, 2001:
1.183 millert 783: A security hole exists in lpd(8) that may allow an
784: attacker to gain root privileges if lpd is running.</a>
1.294 david 785: <li><a href="errata29.html#sendmail2">August 21, 2001:
1.181 millert 786: A security hole exists in sendmail(8) that may allow an
787: attacker on the local host to gain root privileges.</a>
1.294 david 788: <li><a href="errata29.html#nfs">July 30, 2001:
1.180 jason 789: A kernel buffer overflow in the NFS code can be used to execute
790: arbitrary code by users with mount privileges (only root by
1.181 millert 791: default).</a>
1.294 david 792: <li><a href="errata29.html#kernexec">June 15, 2001:
1.178 aaron 793: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 794: <li><a href="errata29.html#sshcookie">June 12, 2001:
1.177 markus 795: sshd(8) allows users to delete arbitrary files named "cookies"
796: if X11 forwarding is enabled. X11 forwarding is disabled
797: by default.</a>
1.294 david 798: <li><a href="errata29.html#fts">May 30, 2001:
1.176 millert 799: Programs using the fts routines can be tricked into changing
800: into the wrong directory.</a>
1.294 david 801: <li><a href="errata29.html#sendmail">May 29, 2001:
1.174 millert 802: Sendmail signal handlers contain unsafe code,
803: leading to numerous race conditions.</a>
1.173 deraadt 804: </ul>
805:
806: <p>
807: <li>
1.288 matthieu 808: <a name="28"></a>
1.152 deraadt 809:
1.294 david 810: <h3><font color="#e00000">OpenBSD 2.8 Security Advisories</font></h3>
1.152 deraadt 811: These are the OpenBSD 2.8 advisories -- all these problems are solved
1.294 david 812: in <a href="anoncvs.html">OpenBSD current</a>. The
813: <a href="stable.html">patch branch</a>. for 2.8 is no longer being maintained,
1.258 beck 814: you should update your machine.
815:
1.152 deraadt 816:
817: <p>
818: <ul>
1.294 david 819: <li><a href="errata28.html#uucp">September 11, 2001:
1.184 millert 820: A security hole exists in uuxqt(8) that may allow an
821: attacker to gain root privileges.</a>
1.294 david 822: <li><a href="errata28.html#lpd">August 29, 2001:
1.183 millert 823: A security hole exists in lpd(8) that may allow an
824: attacker to gain root privileges if lpd is running.</a>
1.294 david 825: <li><a href="errata28.html#sendmail2">August 21, 2001:
1.181 millert 826: A security hole exists in sendmail(8) that may allow an
827: attacker on the local host to gain root privileges.</a>
1.294 david 828: <li><a href="errata28.html#kernexec">June 15, 2001:
1.178 aaron 829: A race condition in the kernel can lead to local root compromise.</a>
1.294 david 830: <li><a href="errata28.html#fts">May 30, 2001:
1.176 millert 831: Programs using the fts routines can be tricked into changing
832: into the wrong directory.</a>
1.294 david 833: <li><a href="errata28.html#sendmail">May 29, 2001:
1.175 millert 834: Sendmail signal handlers contain unsafe code,
835: leading to numerous race conditions.</a>
1.294 david 836: <li><a href="errata28.html#ipf_frag">Apr 23, 2001:
1.231 mickey 837: IPF contains a serious bug with its handling of fragment caching.</a>
1.294 david 838: <li><a href="errata28.html#glob_limit">Apr 23, 2001:
1.172 ericj 839: ftpd(8) contains a potential DoS relating to glob(3).</a>
1.294 david 840: <li><a href="errata28.html#glob">Apr 10, 2001:
1.170 ericj 841: The glob(3) library call contains multiple buffer overflows.</a>
1.294 david 842: <li><a href="errata28.html#readline">Mar 18, 2001:
1.169 millert 843: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 844: <li><a href="errata28.html#ipsec_ah">Mar 2, 2001:
1.167 ericj 845: Insufficient checks in the IPSEC AH IPv4 option handling code can lead to a buffer overrun in the kernel.</a>
1.294 david 846: <li><a href="errata28.html#userldt">Mar 2, 2001:
1.168 horacio 847: The <b>USER_LDT</b> kernel option allows an attacker to gain access to privileged areas of kernel memory.</a>
1.294 david 848: <li><a href="errata28.html#sudo">Feb 22, 2001:
1.171 millert 849: a non-exploitable buffer overflow was fixed in sudo(8).</a>
1.294 david 850: <li><a href="errata28.html#named">Jan 29, 2001:
1.163 jason 851: merge named(8) with ISC BIND 4.9.8-REL, which fixes some buffer vulnerabilities.</a>
1.294 david 852: <li><a href="errata28.html#rnd">Jan 22, 2001:
1.162 jason 853: rnd(4) did not use all of its input when written to.</a>
1.294 david 854: <li><a href="errata28.html#xlock">Dec 22, 2000:
1.159 ericj 855: xlock(1)'s authentication was re-done to authenticate via a named pipe. (patch and new xlock binaries included).</a>
1.294 david 856: <li><a href="errata28.html#procfs">Dec 18, 2000:
1.157 ericj 857: Procfs contains numerous overflows. Procfs is not used by default in OpenBSD. (patch included).</a>
1.294 david 858: <li><a href="errata28.html#kerberos2">Dec 10, 2000:
1.156 deraadt 859: Another problem exists in KerberosIV libraries (patch included).</a>
1.294 david 860: <li><a href="errata28.html#kerberos">Dec 7, 2000:
1.155 deraadt 861: A set of problems in KerberosIV exist (patch included).</a>
1.294 david 862: <li><a href="errata28.html#ftpd">Dec 4, 2000:
1.154 millert 863: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.152 deraadt 864: </ul>
865:
866: <p>
867: <li>
1.288 matthieu 868: <a name="27"></a>
1.124 deraadt 869:
1.294 david 870: <h3><font color="#e00000">OpenBSD 2.7 Security Advisories</font></h3>
1.124 deraadt 871: These are the OpenBSD 2.7 advisories -- all these problems are solved
1.294 david 872: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.124 deraadt 873: OpenBSD 2.6 advisories listed below are fixed in OpenBSD 2.7.
874:
875: <p>
876: <ul>
1.294 david 877: <li><a href="errata27.html#readline">Mar 18, 2001:
1.169 millert 878: The readline library creates history files with permissive modes based on the user's umask.</a>
1.294 david 879: <li><a href="errata27.html#sudo">Feb 22, 2001:
1.169 millert 880: a buffer overflow was fixed in sudo(8).</a>
1.294 david 881: <li><a href="errata27.html#ftpd">Dec 4, 2000:
1.154 millert 882: A single-byte buffer overflow exists in ftpd (patch included).</a>
1.294 david 883: <li><a href="errata27.html#sshforwarding">Nov 10, 2000:
1.152 deraadt 884: Hostile servers can force OpenSSH clients to do agent or X11 forwarding.
885: (patch included)</a>
1.294 david 886: <li><a href="errata27.html#xtrans">Oct 26, 2000:
1.151 matthieu 887: X11 libraries have 2 potential overflows in xtrans code.
888: (patch included)</a>
1.294 david 889: <li><a href="errata27.html#httpd">Oct 18, 2000:
1.150 beck 890: Apache mod_rewrite and mod_vhost_alias modules could expose files
891: on the server in certain configurations if used.
892: (patch included)</a>
1.294 david 893: <li><a href="errata27.html#telnetd">Oct 10, 2000:
1.149 millert 894: The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS,
895: TERMPATH and TERMCAP environment variables as it should.
896: (patch included)</a>
1.294 david 897: <li><a href="errata27.html#format_strings">Oct 6, 2000:
1.148 millert 898: There are printf-style format string bugs in several privileged
899: programs. (patch included)</a>
1.294 david 900: <li><a href="errata27.html#curses">Oct 6, 2000:
1.147 millert 901: libcurses honored terminal descriptions in the $HOME/.terminfo
902: directory as well as in the TERMCAP environment variable for
903: setuid and setgid applications.
1.146 deraadt 904: (patch included)</a>
1.294 david 905: <li><a href="errata27.html#talkd">Oct 6, 2000:
1.146 deraadt 906: A format string vulnerability exists in talkd(8).
907: (patch included)</a>
1.294 david 908: <li><a href="errata27.html#pw_error">Oct 3, 2000:
1.145 aaron 909: A format string vulnerability exists in the pw_error() function of the
910: libutil library, yielding localhost root through chpass(1).
911: (patch included)</a>
1.294 david 912: <li><a href="errata27.html#ipsec">Sep 18, 2000:
1.144 jason 913: Bad ESP/AH packets could cause a crash under certain conditions.
914: (patch included)</a>
1.294 david 915: <li><a href="errata27.html#xlock">Aug 16, 2000:
1.141 deraadt 916: A format string vulnerability (localhost root) exists in xlock(1).
917: (patch included)</a>
1.294 david 918: <li><a href="errata27.html#X11_libs">July 14, 2000:
1.139 deraadt 919: Various bugs found in X11 libraries have various side effects, almost
920: completely denial of service in OpenBSD.
921: (patch included)</a>
1.294 david 922: <li><a href="errata27.html#ftpd">July 5, 2000:
1.136 deraadt 923: Just like pretty much all the other unix ftp daemons
924: on the planet, ftpd had a remote root hole in it.
925: Luckily, ftpd was not enabled by default.
1.137 deraadt 926: The problem exists if anonymous ftp is enabled.
1.136 deraadt 927: (patch included)</a>
1.294 david 928: <li><a href="errata27.html#mopd">July 5, 2000:
1.136 deraadt 929: Mopd, very rarely used, contained some buffer overflows.
930: (patch included)</a>
1.294 david 931: <li><a href="errata27.html#libedit">June 28, 2000:
1.135 deraadt 932: libedit would check for a <b>.editrc</b> file in the current
933: directory. Not known to be a real security issue, but a patch
934: is available anyways.
935: (patch included)</a>
1.294 david 936: <li><a href="errata27.html#dhclient">June 24, 2000:
1.134 deraadt 937: A serious bug in dhclient(8) could allow strings from a
938: malicious dhcp server to be executed in the shell as root.
939: (patch included)</a>
1.294 david 940: <li><a href="errata27.html#isakmpd">June 9, 2000:
1.133 deraadt 941: A serious bug in isakmpd(8) policy handling wherein
942: policy verification could be completely bypassed in isakmpd.
943: (patch included)</a>
1.294 david 944: <li><a href="errata27.html#uselogin">June 6, 2000:
1.132 deraadt 945: The non-default flag UseLogin in <b>/etc/sshd_config</b> is broken,
946: should not be used, and results in security problems on
947: other operating systems.</a>
1.294 david 948: <li><a href="errata27.html#bridge">May 26, 2000:
1.129 deraadt 949: The bridge(4) <i>learning</i> flag may be bypassed.
1.128 deraadt 950: (patch included)</a>
1.294 david 951: <li><a href="errata27.html#ipf">May 25, 2000:
1.127 kjell 952: Improper use of ipf <i>keep-state</i> rules can result
953: in firewall rules being bypassed. (patch included)</a>
954:
1.124 deraadt 955: </ul>
956:
957: <p>
958: <li>
1.288 matthieu 959: <a name="26"></a>
1.119 deraadt 960:
1.294 david 961: <h3><font color="#e00000">OpenBSD 2.6 Security Advisories</font></h3>
1.119 deraadt 962: These are the OpenBSD 2.6 advisories -- all these problems are solved
1.294 david 963: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.119 deraadt 964: OpenBSD 2.5 advisories listed below are fixed in OpenBSD 2.6.
965:
966: <p>
967: <ul>
1.294 david 968: <li><a href="errata26.html#semconfig">May 26, 2000:
1.130 deraadt 969: SYSV semaphore support contained an undocumented system call
1.131 deraadt 970: which could wedge semaphore-using processes from exiting. (patch included)</a>
1.294 david 971: <li><a href="errata26.html#ipf">May 25, 2000:
1.127 kjell 972: Improper use of ipf <i>keep-state</i> rules can result
973: in firewall rules being bypassed. (patch included)</a>
1.294 david 974: <li><a href="errata26.html#xlockmore">May 25, 2000:
1.125 deraadt 975: xlockmore has a bug which a localhost attacker can use to gain
976: access to the encrypted root password hash (which is normally
1.245 miod 977: encoded using blowfish</a> (see
1.294 david 978: <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=crypt&sektion=3">
1.125 deraadt 979: crypt(3)</a>)
1.245 miod 980: (patch included).
1.294 david 981: <li><a href="errata26.html#procfs">Jan 20, 2000:
1.123 deraadt 982: Systems running with procfs enabled and mounted are
983: vulnerable to a very tricky exploit. procfs is not
984: mounted by default.
985: (patch included).</a>
1.294 david 986: <li><a href="errata26.html#sendmail">Dec 4, 1999:
1.296 david 987: Sendmail permitted any user to cause an aliases file wrap,
1.190 mpech 988: thus exposing the system to a race where the aliases file
989: did not exist.
1.119 deraadt 990: (patch included).</a>
1.294 david 991: <li><a href="errata26.html#poll">Dec 4, 1999:
1.190 mpech 992: Various bugs in poll(2) may cause a kernel crash.</a>
1.294 david 993: <li><a href="errata26.html#sslUSA">Dec 2, 1999:
1.120 deraadt 994: A buffer overflow in the RSAREF code included in the
995: USA version of libssl, is possibly exploitable in
996: httpd, ssh, or isakmpd, if SSL/RSA features are enabled.
1.124 deraadt 997: (patch included).<br></a>
998: <strong>Update:</strong> Turns out that this was not exploitable
999: in any of the software included in OpenBSD 2.6.
1.294 david 1000: <li><a href="errata26.html#ifmedia">Nov 9, 1999:
1.190 mpech 1001: Any user could change interface media configurations, resulting in
1002: a localhost denial of service attack.
1.121 deraadt 1003: (patch included).</a>
1.119 deraadt 1004: </ul>
1005:
1006: <p>
1007: <li>
1.288 matthieu 1008: <a name="25"></a>
1.106 deraadt 1009:
1.294 david 1010: <h3><font color="#e00000">OpenBSD 2.5 Security Advisories</font></h3>
1.93 deraadt 1011: These are the OpenBSD 2.5 advisories -- all these problems are solved
1.294 david 1012: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.93 deraadt 1013: OpenBSD 2.4 advisories listed below are fixed in OpenBSD 2.5.
1014:
1.96 deraadt 1015: <p>
1.104 deraadt 1016: <ul>
1.294 david 1017: <li><a href="errata25.html#cron">Aug 30, 1999:
1.103 deraadt 1018: In cron(8), make sure argv[] is NULL terminated in the
1019: fake popen() and run sendmail as the user, not as root.
1020: (patch included).</a>
1.294 david 1021: <li><a href="errata25.html#miscfs">Aug 12, 1999: The procfs and fdescfs
1.101 deraadt 1022: filesystems had an overrun in their handling of uio_offset
1023: in their readdir() routines. (These filesystems are not
1024: enabled by default). (patch included).</a>
1.294 david 1025: <li><a href="errata25.html#profil">Aug 9, 1999: Stop profiling (see profil(2))
1.100 deraadt 1026: when we execve() a new process. (patch included).</a>
1.294 david 1027: <li><a href="errata25.html#ipsec_in_use">Aug 6, 1999: Packets that should have
1.98 deraadt 1028: been handled by IPsec may be transmitted as cleartext.
1029: PF_KEY SA expirations may leak kernel resources.
1030: (patch included).</a>
1.294 david 1031: <li><a href="errata25.html#rc">Aug 5, 1999: In /etc/rc, use mktemp(1) for
1.97 deraadt 1032: motd re-writing and change the find(1) to use -execdir
1033: (patch included).</a>
1.294 david 1034: <li><a href="errata25.html#chflags">Jul 30, 1999: Do not permit regular
1.95 deraadt 1035: users to chflags(2) or fchflags(2) on character or block devices
1036: which they may currently be the owner of (patch included).</a>
1.294 david 1037: <li><a href="errata25.html#nroff">Jul 27, 1999: Cause groff(1) to be invoked
1.95 deraadt 1038: with the -S flag, when called by nroff(1) (patch included).</a>
1.93 deraadt 1039: </ul>
1040:
1.106 deraadt 1041: <p>
1042: <li>
1.288 matthieu 1043: <a name="24"></a>
1.235 miod 1044:
1.294 david 1045: <h3><font color="#e00000">OpenBSD 2.4 Security Advisories</font></h3>
1.75 deraadt 1046: These are the OpenBSD 2.4 advisories -- all these problems are solved
1.294 david 1047: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.75 deraadt 1048: OpenBSD 2.3 advisories listed below are fixed in OpenBSD 2.4.
1049:
1.96 deraadt 1050: <p>
1.75 deraadt 1051: <ul>
1.294 david 1052: <li><a href="errata24.html#poll">Mar 22, 1999: The nfds argument for poll(2) needs
1.91 deraadt 1053: to be constrained, to avoid kvm starvation (patch included).</a>
1.294 david 1054: <li><a href="errata24.html#tss">Mar 21, 1999: A change in TSS handling stops
1.91 deraadt 1055: another kernel crash case caused by the <strong>crashme</strong>
1056: program (patch included).</a>
1.294 david 1057: <li><a href="errata24.html#nlink">Feb 25, 1999: An unbounded increment on the
1.90 deraadt 1058: nlink value in FFS and EXT2FS filesystems can cause a system crash.
1.89 deraadt 1059: (patch included).</a>
1.294 david 1060: <li><a href="errata24.html#ping">Feb 23, 1999: Yet another buffer overflow
1.88 deraadt 1061: existed in ping(8). (patch included).</a>
1.294 david 1062: <li><a href="errata24.html#ipqrace">Feb 19, 1999: ipintr() had a race in use of
1.87 deraadt 1063: the ipq, which could permit an attacker to cause a crash.
1064: (patch included).</a>
1.294 david 1065: <li><a href="errata24.html#accept">Feb 17, 1999: A race condition in the
1.86 deraadt 1066: kernel between accept(2) and select(2) could permit an attacker
1067: to hang sockets from remote.
1068: (patch included).</a>
1.294 david 1069: <li><a href="errata24.html#maxqueue">Feb 17, 1999: IP fragment assembly can
1.85 deraadt 1070: bog the machine excessively and cause problems.
1071: (patch included).</a>
1.294 david 1072: <li><a href="errata24.html#trctrap">Feb 12, 1999: i386 T_TRCTRAP handling and
1.84 deraadt 1073: DDB interacted to possibly cause a crash.
1074: (patch included).</a>
1.294 david 1075: <li><a href="errata24.html#rst">Feb 11, 1999: TCP/IP RST handling was sloppy.
1.83 deraadt 1076: (patch included).</a>
1.294 david 1077: <li><a href="errata24.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1078: problem in bootpd(8). (patch included).</a>
1.294 david 1079: <li><a href="errata24.html#termcap">Nov 19, 1998: There is a possibly locally
1.82 deraadt 1080: exploitable problem relating to environment variables in termcap
1081: and curses. (patch included).</a>
1.294 david 1082: <li><a href="errata24.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1083: bug in the TCP decoding kernel. (patch included).</a>
1.75 deraadt 1084: </ul>
1085:
1.106 deraadt 1086: <p>
1087: <li>
1.288 matthieu 1088: <a name="23"></a>
1.235 miod 1089:
1.294 david 1090: <h3><font color="#e00000">OpenBSD 2.3 Security Advisories</font></h3>
1.73 deraadt 1091: These are the OpenBSD 2.3 advisories -- all these problems are solved
1.294 david 1092: in <a href="anoncvs.html">OpenBSD current</a>. Obviously, all the
1.73 deraadt 1093: OpenBSD 2.2 advisories listed below are fixed in OpenBSD 2.3.
1.53 matthieu 1094:
1.96 deraadt 1095: <p>
1.53 matthieu 1096: <ul>
1.294 david 1097: <li><a href="errata23.html#bootpd">Nov 27, 1998: There is a remotely exploitable
1.81 deraadt 1098: problem in bootpd(8). (patch included).</a>
1.294 david 1099: <li><a href="errata23.html#tcpfix">Nov 13, 1998: There is a remote machine lockup
1.78 deraadt 1100: bug in the TCP decoding kernel. (patch included).</a>
1.294 david 1101: <li><a href="errata23.html#resolver">August 31, 1998: A benign looking resolver
1.190 mpech 1102: buffer overflow bug was re-introduced accidentally (patches included).</a>
1.294 david 1103: <li><a href="errata23.html#chpass">Aug 2, 1998:
1.190 mpech 1104: chpass(1) has a file descriptor leak which allows an
1105: attacker to modify /etc/master.passwd.</a>
1.294 david 1106: <li><a href="errata23.html#inetd">July 15, 1998: Inetd had a file descriptor leak.</a>
1107: <li><a href="errata23.html#fdalloc">Jul 2, 1998: setuid and setgid processes
1.72 deraadt 1108: should not be executed with fd slots 0, 1, or 2 free.
1109: (patch included).</a>
1.294 david 1110: <li><a href="errata23.html#xlib">June 6, 1998: Further problems with the X
1.71 deraadt 1111: libraries (patches included).</a>
1.294 david 1112: <li><a href="errata23.html#kill">May 17, 1998: kill(2) of setuid/setgid target
1.66 deraadt 1113: processes too permissive (4th revision patch included).</a>
1.294 david 1114: <li><a href="errata23.html#immutable">May 11, 1998: mmap() permits partial bypassing
1.60 deraadt 1115: of immutable and append-only file flags. (patch included).</a>
1.294 david 1116: <li><a href="errata23.html#ipsec">May 5, 1998: Incorrect handling of IPSEC packets
1.190 mpech 1117: if IPSEC is enabled (patch included).</a>
1.294 david 1118: <li><a href="errata23.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm and Xaw
1.58 deraadt 1119: (CERT advisory VB-98.04) (patch included).</a>
1.53 matthieu 1120: </ul>
1.9 deraadt 1121:
1.106 deraadt 1122: <p>
1123: <li>
1.288 matthieu 1124: <a name="22"></a>
1.235 miod 1125:
1.294 david 1126: <h3><font color="#e00000">OpenBSD 2.2 Security Advisories</font></h3>
1.45 deraadt 1127: These are the OpenBSD 2.2 advisories. All these problems are solved
1.294 david 1128: in <a href="23.html">OpenBSD 2.3</a>. Some of these problems
1.45 deraadt 1129: still exist in other operating systems. (The supplied patches are for
1130: OpenBSD 2.2; they may or may not work on OpenBSD 2.1).
1.9 deraadt 1131:
1.96 deraadt 1132: <p>
1.9 deraadt 1133: <ul>
1.294 david 1134: <li><a href="errata22.html#ipsec">May 5, 1998: Incorrect handling of IPSEC
1.72 deraadt 1135: packets if IPSEC is enabled (patch included).</a>
1.294 david 1136: <li><a href="errata22.html#xterm-xaw">May 1, 1998: Buffer overflow in xterm
1.72 deraadt 1137: and Xaw (CERT advisory VB-98.04) (patch included).</a>
1.294 david 1138: <li><a href="errata22.html#uucpd">Apr 22, 1998: Buffer overflow in uucpd
1.72 deraadt 1139: (patch included).</a>
1.294 david 1140: <li><a href="errata22.html#rmjob">Apr 22, 1998: Buffer mismanagement in lprm
1.72 deraadt 1141: (patch included).</a>
1.294 david 1142: <li><a href="errata22.html#ping">Mar 31, 1998: Overflow in ping -R (patch included).</a>
1143: <li><a href="errata22.html#named">Mar 30, 1998: Overflow in named fake-iquery
1.59 deraadt 1144: (patch included).</a>
1.294 david 1145: <li><a href="errata22.html#mountd">Mar 2, 1998: Accidental NFS filesystem
1.72 deraadt 1146: export (patch included).</a>
1.112 philen 1147: <li><a href="advisories/mmap.txt">Feb 26, 1998: Read-write mmap() flaw.</a>
1.294 david 1148: Revision 3 of the patch is available <a href="errata22.html#mmap">here</a>
1.112 philen 1149: <li><a href="advisories/sourceroute.txt">Feb 19, 1998: Sourcerouted Packet
1.59 deraadt 1150: Acceptance.</a>
1.294 david 1151: A patch is available <a href="errata22.html#sourceroute">here</a>.
1152: <li><a href="errata22.html#ruserok">Feb 13, 1998: Setuid coredump & Ruserok()
1.72 deraadt 1153: flaw (patch included).</a>
1.294 david 1154: <li><a href="errata22.html#ldso">Feb 9, 1998: MIPS ld.so flaw (patch included).</a>
1.1 deraadt 1155: </ul>
1156:
1.106 deraadt 1157: <p>
1158: <li>
1.288 matthieu 1159: <a name="21"></a>
1.235 miod 1160:
1.294 david 1161: <h3><font color="#e00000">OpenBSD 2.1 Security Advisories</font></h3>
1.52 deraadt 1162: These are the OpenBSD 2.1 advisories. All these problems are solved
1.294 david 1163: in <a href="22.html">OpenBSD 2.2</a>. Some of these problems still
1.52 deraadt 1164: exist in other operating systems. (If you are running OpenBSD 2.1, we
1165: would strongly recommend an upgrade to the newest release, as this
1166: patch list only attempts at fixing the most important security
1167: problems. In particular, OpenBSD 2.2 fixes numerous localhost
1168: security problems. Many of those problems were solved in ways which
1169: make it hard for us to provide patches).
1170:
1.96 deraadt 1171: <p>
1.52 deraadt 1172: <ul>
1.112 philen 1173: <li><a href="advisories/signals.txt">Sep 15, 1997: Deviant Signals (patch included)</a>
1174: <li><a href="advisories/rfork.txt">Aug 2, 1997: Rfork() system call flaw
1.59 deraadt 1175: (patch included)</a>
1.112 philen 1176: <li><a href="advisories/procfs.txt">Jun 24, 1997: Procfs flaws (patch included)</a>
1.52 deraadt 1177: </ul>
1.51 deraadt 1178:
1.106 deraadt 1179: <p>
1180: <li>
1.288 matthieu 1181: <a name="20"></a>
1.235 miod 1182:
1.294 david 1183: <h3><font color="#e00000">OpenBSD 2.0 Security Advisories</font></h3>
1.99 deraadt 1184: These are the OpenBSD 2.0 advisories. All these problems are solved
1.294 david 1185: in <a href="21.html">OpenBSD 2.1</a>. Some of these problems still
1.99 deraadt 1186: exist in other operating systems. (If you are running OpenBSD 2.0, we
1187: commend you for being there back in the old days!, but you're really
1188: missing out if you don't install a new version!)
1189:
1190: <p>
1191: <ul>
1.112 philen 1192: <li><a href="advisories/res_random.txt">April 22, 1997: Predictable IDs in the
1.99 deraadt 1193: resolver (patch included)</a>
1194: <li>Many others... if people can hunt them down, please let me know
1195: and we'll put them up here.
1196: </ul>
1.51 deraadt 1197: <p>
1.106 deraadt 1198:
1.288 matthieu 1199: <a name="watching"></a>
1.294 david 1200: <li><h3><font color="#e00000">Watching our Changes</font></h3><p>
1.106 deraadt 1201:
1.21 deraadt 1202: Since we take a proactive stance with security, we are continually
1203: finding and fixing new security problems. Not all of these problems
1.80 espie 1204: get widely reported because (as stated earlier) many of them are not
1.45 deraadt 1205: confirmed to be exploitable; many simple bugs we fix do turn out to
1206: have security consequences we could not predict. We do not have the
1207: time resources to make these changes available in the above format.<p>
1.21 deraadt 1208:
1209: Thus there are usually minor security fixes in the current source code
1210: beyond the previous major OpenBSD release. We make a limited
1.45 deraadt 1211: guarantee that these problems are of minimal impact and unproven
1.44 ian 1212: exploitability. If we discover that a problem definitely matters for
1.45 deraadt 1213: security, patches will show up here <strong>VERY</strong> quickly.<p>
1.21 deraadt 1214:
1.45 deraadt 1215: People who are really concerned with security can do a number of
1216: things:<p>
1.21 deraadt 1217:
1218: <ul>
1219: <li>If you understand security issues, watch our
1.294 david 1220: <a href="mail.html">source-changes mailing list</a> and keep an
1.23 deraadt 1221: eye out for things which appear security related. Since
1.21 deraadt 1222: exploitability is not proven for many of the fixes we make,
1223: do not expect the relevant commit message to say "SECURITY FIX!".
1224: If a problem is proven and serious, a patch will be available
1225: here very shortly after.
1.161 horacio 1226: <li>In addition to source changes, you can watch our <a href="mail.html">
1.160 ericj 1227: security-announce mailing list</a> which will notify you for every
1.186 ian 1228: security related item that the OpenBSD team deems as a possible threat,
1.160 ericj 1229: and instruct you on how to patch the problem.
1.21 deraadt 1230: <li>Track our current source code tree, and teach yourself how to do a
1.29 deraadt 1231: complete system build from time to time (read /usr/src/Makefile
1232: carefully). Users can make the assumption that the current
1233: source tree always has stronger security than the previous release.
1.45 deraadt 1234: However, building your own system from source code is not trivial;
1.265 miod 1235: it is nearly 600MB of source code, and problems do occur as we
1.45 deraadt 1236: transition between major releases.
1.115 ericj 1237: <li>Install a binary snapshot for your
1.80 espie 1238: architecture, which are made available fairly often. For
1.29 deraadt 1239: instance, an i386 snapshot is typically made available weekly.
1.21 deraadt 1240: </ul>
1241:
1.9 deraadt 1242: <p>
1.288 matthieu 1243: <a name="reporting"></a>
1.294 david 1244: <li><h3><font color="#e00000">Reporting problems</font></h3><p>
1.3 deraadt 1245:
1.5 deraadt 1246: <p> If you find a new security problem, you can mail it to
1.294 david 1247: <a href="mailto:deraadt@openbsd.org">deraadt@openbsd.org</a>.
1.7 deraadt 1248: <br>
1.5 deraadt 1249: If you wish to PGP encode it (but please only do so if privacy is very
1.112 philen 1250: urgent, since it is inconvenient) use this <a href="advisories/pgpkey.txt">pgp key</a>.
1.5 deraadt 1251:
1.107 deraadt 1252: <p>
1.288 matthieu 1253: <a name="papers"></a>
1.294 david 1254: <li><h3><font color="#e00000">Further Reading</font></h3><p>
1.107 deraadt 1255:
1256: A number of papers have been written by OpenBSD team members, about security
1257: related changes they have done in OpenBSD. The postscript versions of these
1.108 deraadt 1258: documents are available as follows.<p>
1.107 deraadt 1259:
1260: <ul>
1.113 deraadt 1261: <li>A Future-Adaptable Password Scheme.<br>
1.294 david 1262: <a href="events.html#usenix99">Usenix 1999</a>,
1263: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
1264: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
1265: <a href="papers/bcrypt-paper.ps">paper</a> and
1266: <a href="papers/bcrypt-slides.ps">slides</a>.
1.113 deraadt 1267: <p>
1268: <li>Cryptography in OpenBSD: An Overview.<br>
1.294 david 1269: <a href="events.html#usenix99">Usenix 1999</a>,
1270: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
1271: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
1272: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
1273: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
1274: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1275: <a href="papers/crypt-paper.ps">paper</a> and
1276: <a href="papers/crypt-slides.ps">slides</a>.
1.113 deraadt 1277: <p>
1278: <li>strlcpy and strlcat -- consistent, safe, string copy and concatenation.<br>
1.294 david 1279: <a href="events.html#usenix99">Usenix 1999</a>,
1280: by <a href="mailto:millert@openbsd.org">Todd C. Miller</a>,
1281: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
1282: <a href="papers/strlcpy-paper.ps">paper</a> and
1283: <a href="papers/strlcpy-slides.ps">slides</a>.
1.113 deraadt 1284: <p>
1.118 deraadt 1285: <li>Dealing with Public Ethernet Jacks-Switches, Gateways, and Authentication.<br>
1.294 david 1286: <a href="events.html#lisa99">LISA 1999</a>,
1287: by <a href="mailto:beck@openbsd.org">Bob Beck</a>.<br>
1288: <a href="papers/authgw-paper.ps">paper</a> and
1289: <a href="papers/authgw-slides.ps">slides</a>.
1.118 deraadt 1290: <p>
1.153 jufi 1291: <li>Encrypting Virtual Memory<br>
1.294 david 1292: <a href="events.html#sec2000">Usenix Security 2000</a>,
1293: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1294: <a href="papers/swapencrypt.ps">paper</a> and
1295: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.142 deraadt 1296: <p>
1.107 deraadt 1297: </ul>
1.294 david 1298: </ul>
1.106 deraadt 1299:
1.2 deraadt 1300: <hr>
1.294 david 1301: <a href="index.html"><img height=24 width=24 src="back.gif" border=0 alt="OpenBSD"></a>
1302: <a href="mailto:www@openbsd.org">www@openbsd.org</a>
1.24 deraadt 1303: <br>
1.303 ! markus 1304: <small>$OpenBSD: security.html,v 1.302 2004/12/14 13:23:42 markus Exp $</small>
1.1 deraadt 1305:
1.24 deraadt 1306: </body>
1307: </html>
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