USN-3863-1: APT vulnerability

22 January 2019

apt vulnerability

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • 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


Max Justicz discovered that APT incorrectly handled certain parameters during redirects. 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 18.10
apt - 1.7.0ubuntu0.1
Ubuntu 18.04 LTS
apt - 1.6.6ubuntu0.1
Ubuntu 16.04 LTS
apt - 1.2.29ubuntu0.1
Ubuntu 14.04 LTS
apt - 1.0.1ubuntu2.19

To update your system, please follow these instructions:

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