Ubuntu Security Notice USN-1295-1
December 08, 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
Dovecot could be made to expose sensitive information over the network.
- dovecot: IMAP and POP3 email server
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
The problem can be corrected by updating your system to the following
In general, a standard system update will make all the necessary changes.