USN-1169-1: APT vulnerability

13 July 2011

apt vulnerability

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

  • Ubuntu 11.04


An attacker could trick APT into installing altered packages.

Software Description

  • apt - Advanced front-end for dpkg


William Grant discovered that APT incorrectly validated inline GPG signatures. 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 11.04
apt -

To update your system, please follow these instructions:

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