USN-1588-1: Software Properties vulnerability

Ubuntu Security Notice USN-1588-1

1st October, 2012

software-properties vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.04 LTS


Software Properties could be tricked into installing arbitrary PPA GPG keys.

Software description

  • software-properties - manage the repositories that you install software from


It was discovered that the apt-add-repository tool incorrectly validated
PPA GPG keys when importing from a keyserver. If a remote attacker were
able to perform a man-in-the-middle attack, this flaw could be exploited to
install altered package repository GPG keys.

Update instructions

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

Ubuntu 12.04 LTS:
Ubuntu 11.10:
Ubuntu 11.04:
Ubuntu 10.04 LTS:

To update your system, please follow these instructions:

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


LP: 1016643