USN-2246-1: APT vulnerability

17 June 2014

apt vulnerability

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

  • Ubuntu 14.04 LTS
  • Ubuntu 13.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


An attacker could trick APT into installing altered source packages.

Software Description

  • apt - Advanced front-end for dpkg


Jakub Wilk discovered that APT did not correctly validate signatures when downloading source packages. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could potentially be used to install altered source packages.

Update instructions

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

Ubuntu 14.04 LTS
apt - 1.0.1ubuntu2.1
Ubuntu 13.10
apt -
Ubuntu 12.04 LTS
apt - 0.8.16~exp12ubuntu10.17
Ubuntu 10.04 LTS
apt -

To update your system, please follow these instructions:

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