CVE-2011-4318: Input Validation
First published: Fri Nov 18 2011(Updated: )
A security flaw was found in the way Dovecot, an IMAP and POP3 email server, performed remote server identity verification (x509 certificate's Common Name field was not checked to match provided remote server host name), when Dovecot was configured to proxy IMAP and POP3 connections to remote hosts and TLS/SSL protocols were requested (ssl=yes or starttls=yes) in the configuration to secure these connections to the destination server. A remote attacker could use this flaw to conduct man-in-the-middle (MITM) attacks via specially-crafted x509v3 certificate. References: [1] <a href="http://www.dovecot.org/list/dovecot-news/2011-November/000200.html">http://www.dovecot.org/list/dovecot-news/2011-November/000200.html</a> [2] <a href="https://secunia.com/advisories/46886/">https://secunia.com/advisories/46886/</a> [3] <a href="https://bugs.gentoo.org/show_bug.cgi?id=390887">https://bugs.gentoo.org/show_bug.cgi?id=390887</a> [4] <a href="http://wiki.dovecot.org/PasswordDatabase/ExtraFields/Proxy">http://wiki.dovecot.org/PasswordDatabase/ExtraFields/Proxy</a> Relevant upstream patch: [5] <a href="http://hg.dovecot.org/dovecot-2.0/rev/5e9eaf63a6b1">http://hg.dovecot.org/dovecot-2.0/rev/5e9eaf63a6b1</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Dovecot Dovecot | =2.0.9 | |
| Dovecot Dovecot | =2.0.14 | |
| Dovecot Dovecot | =2.0.7 | |
| Dovecot Dovecot | =2.0.12 | |
| Dovecot Dovecot | =2.0.4 | |
| Dovecot Dovecot | =2.0.2 | |
| Dovecot Dovecot | =2.0.1 | |
| Dovecot Dovecot | =2.0.10 | |
| Dovecot Dovecot | =2.0.11 | |
| Dovecot Dovecot | =2.0.13 | |
| Dovecot Dovecot | =2.0.8 | |
| Dovecot Dovecot | =2.0.3 | |
| Dovecot Dovecot | =2.0.0 | |
| Dovecot Dovecot | =2.0.15 | |
| Dovecot Dovecot | =2.0.5 | |
| Dovecot Dovecot | =2.0.6 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2011/11/18/5
- https://bugzilla.redhat.com/show_bug.cgi?id=754980
- http://rhn.redhat.com/errata/RHSA-2013-0520.html
- http://www.dovecot.org/list/dovecot-news/2011-November/000200.html
- http://secunia.com/advisories/52311
- http://www.openwall.com/lists/oss-security/2011/11/18/7
- http://hg.dovecot.org/dovecot-2.0/rev/5e9eaf63a6b1
- https://bugs.gentoo.org/show_bug.cgi?id=390887
- http://secunia.com/advisories/46886
- https://secunia.com/advisories/46886/
- http://wiki.dovecot.org/PasswordDatabase/ExtraFields/Proxy
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=754981
- http://www.openwall.com/lists/oss-security/2011/11/18/4
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=754980#c0
- http://hg.dovecot.org/dovecot-2.0/rev/de8715e4d793
- http://thread.gmane.org/gmane.comp.security.oss.general/6275/focus=6276
- https://rhn.redhat.com/errata/RHSA-2013-0520.html
- collector/nvd-historical
- collector/nvd-index
- agent/type
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/references
- agent/severity
- agent/last-modified-date
- agent/weakness
- agent/description
- agent/event
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2011-4318
- agent/tags
- agent/trending
- vendor/dovecot
- canonical/dovecot dovecot
- version/dovecot dovecot/2.0.9
- version/dovecot dovecot/2.0.14
- version/dovecot dovecot/2.0.7
- version/dovecot dovecot/2.0.12
- version/dovecot dovecot/2.0.4
- version/dovecot dovecot/2.0.2
- version/dovecot dovecot/2.0.1
- version/dovecot dovecot/2.0.10
- version/dovecot dovecot/2.0.11
- version/dovecot dovecot/2.0.13
- version/dovecot dovecot/2.0.8
- version/dovecot dovecot/2.0.3
- version/dovecot dovecot/2.0.0
- version/dovecot dovecot/2.0.15
- version/dovecot dovecot/2.0.5
- version/dovecot dovecot/2.0.6