USN-1676-1: AppArmor update

Ubuntu Security Notice USN-1676-1

19th December, 2012

AppArmor update

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

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10

Summary

A weakness was discovered in the example AppArmor profile for chromium-browser.

Software description

  • apparmor - Linux security system

Details

Dan Rosenberg discovered that the example AppArmor profile for
chromium-browser could be escaped by calling xdg-settings with a crafted
environment.

Update instructions

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

Ubuntu 12.04 LTS:
apparmor-profiles 2.7.102-0ubuntu3.7
Ubuntu 11.10:
apparmor-profiles 2.7.0~beta1+bzr1774-1ubuntu2.2

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

LP: 1045986