Ubuntu Security Notice 1295-1 - It was discovered that Dovecot incorrectly validated certificate hostnames when being used as a POP3 and IMAP proxy. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to view sensitive information.
6537b446fcea6b049718ea977697f880df756abeecdad9dba3605ca876e59b50
==========================================================================
Ubuntu Security Notice USN-1295-1
December 08, 2011
dovecot vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
Summary:
Dovecot could be made to expose sensitive information over the network.
Software Description:
- dovecot: IMAP and POP3 email server
Details:
It was discovered that Dovecot incorrectly validated certificate hostnames
when being used as a POP3 and IMAP proxy. If a remote attacker were able to
perform a man-in-the-middle attack, this flaw could be exploited to view
sensitive information.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
dovecot-common 1:2.0.13-1ubuntu3.2
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1295-1
CVE-2011-4318
Package Information:
https://launchpad.net/ubuntu/+source/dovecot/1:2.0.13-1ubuntu3.2