Ubuntu 15.04: USN-2657-1 Moderate: Unattended-Upgrades Installation Risk

ubuntu

June 29, 2015

An attacker could trick unattended-upgrades into installing altered packages.

Summary

An attacker could trick unattended-upgrades into installing altered

packages.

Software Description:

- unattended-upgrades: automatic installation of security upgrades

Details:

It was discovered that unattended-upgrades incorrectly performed

authentication checks in certain configurations. If a remote attacker were

able to perform a man-in-the-middle attack, this flaw could potentially be

used to install altered packages.

Topics Covered

security advisory authentication issue ubuntu unattended-upgrades install risk

Update Instructions

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

Ubuntu 15.04:
  unattended-upgrades             0.83.6ubuntu1

Ubuntu 14.10:
  unattended-upgrades             0.82.8ubuntu0.3

Ubuntu 14.04 LTS:
  unattended-upgrades             0.82.1ubuntu2.3

Ubuntu 12.04 LTS:
  unattended-upgrades             0.76ubuntu1.1

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