USN-2353-1: APT vulnerability

23 September 2014

apt vulnerability

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

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


APT could be made to crash or run programs if it received specially crafted network traffic.

Software Description

  • apt - Advanced front-end for dpkg


It was discovered that APT incorrectly handled certain http URLs. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to cause APT to crash, resulting in a denial of service, or possibly execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability to a denial of service. (CVE-2014-6273)

In addition, this update fixes regressions introduced by the USN-2348-1 security update: APT incorrectly handled file:/// sources on a different partition, incorrectly handled Dir::state::lists set to a relative path, and incorrectly handled cdrom: sources.

Update instructions

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

Ubuntu 14.04 LTS
apt - 1.0.1ubuntu2.4.1
Ubuntu 12.04 LTS
apt - 0.8.16~exp12ubuntu10.20.1
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.