USN-1385-1: APT vulnerability

6 March 2012

apt vulnerability

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

  • Ubuntu 11.10
  • Ubuntu 11.04

Summary

An attacker could trick APT into installing altered packages.

Software Description

  • apt - Advanced front-end for dpkg

Details

Simon Ruderich discovered that APT incorrectly handled repositories that use InRelease files. The default Ubuntu repositories do not use InRelease files, so this issue only affected third-party repositories. 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 11.10
apt - 0.8.16~exp5ubuntu13.2
Ubuntu 11.04
apt - 0.8.13.2ubuntu4.4

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References