USN-1962-1: ubuntu-system-service vulnerability

Ubuntu Security Notice USN-1962-1

18th September, 2013

ubuntu-system-service vulnerability

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

  • Ubuntu 13.04
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS

Summary

ubuntu-system-service could be tricked into bypassing polkit authorizations.

Software description

  • ubuntu-system-service - Dbus service to set various system-wide configurations

Details

It was discovered that ubuntu-system-service was using polkit in an unsafe
manner. A local attacker could possibly use this issue to bypass intended
polkit authorizations.

Update instructions

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

Ubuntu 13.04:
ubuntu-system-service 0.2.4.1
Ubuntu 12.10:
ubuntu-system-service 0.2.3.1
Ubuntu 12.04 LTS:
ubuntu-system-service 0.2.2.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

CVE-2013-1062