USN-1295-1: Dovecot vulnerability

8 December 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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References