SB2013030709 - Input validation error in Dovecot
Published: March 7, 2013 Updated: August 11, 2020
Security Bulletin ID
SB2013030709
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2011-4318)
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.
Remediation
Install update from vendor's website.
References
- http://hg.dovecot.org/dovecot-2.0/rev/5e9eaf63a6b1
- http://rhn.redhat.com/errata/RHSA-2013-0520.html
- http://secunia.com/advisories/46886
- http://secunia.com/advisories/52311
- http://www.dovecot.org/list/dovecot-news/2011-November/000200.html
- http://www.openwall.com/lists/oss-security/2011/11/18/5
- http://www.openwall.com/lists/oss-security/2011/11/18/7
- https://bugs.gentoo.org/show_bug.cgi?id=390887
- https://bugzilla.redhat.com/show_bug.cgi?id=754980