USN-3156-1: APT vulnerability

13 December 2016

apt vulnerability

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

  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


An attacker could trick APT into installing altered packages.

Software Description

  • apt - Advanced front-end for dpkg


Jann Horn discovered that APT incorrectly handled InRelease files. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could potentially be used to install altered packages.

Update instructions

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

Ubuntu 16.10
apt - 1.3.2ubuntu0.1
Ubuntu 16.04 LTS
apt - 1.2.15ubuntu0.2
Ubuntu 14.04 LTS
apt - 1.0.1ubuntu2.17

To update your system, please follow these instructions:

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