Ubuntu Security Notice USN-2657-1
29th June, 2015
unattended-upgrades vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 15.04
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
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.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- 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
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.