USN-2657-1: unattended-upgrades vulnerability

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.

References

CVE-2015-1330

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