USN-1666-1: Aptdaemon vulnerability

17 December 2012

aptdaemon vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10


Aptdaemon could be tricked into installing arbitrary PPA GPG keys.

Software Description

  • aptdaemon - transaction based package management service


It was discovered that Aptdaemon incorrectly validated PPA GPG keys when importing from a keyserver. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to install altered package repository GPG keys.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04 LTS
aptdaemon - 0.43+bzr805-0ubuntu7
Ubuntu 11.10
aptdaemon - 0.43+bzr697-0ubuntu1.3

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.