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Ubuntu Security Notice USN-1385-1
March 06, 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

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

References:
http://www.ubuntu.com/usn/usn-1385-1
CVE-2012-0214

Package Information:
https://launchpad.net/ubuntu/+source/apt/0.8.16~exp5ubuntu13.2
https://launchpad.net/ubuntu/+source/apt/0.8.13.2ubuntu4.4