USN-3784-1: AppArmor update
4 October 2018
Use a more restrictive blocklist in several policy abstractions.
Releases
Packages
- apparmor - Linux security system
Details
As a security improvement, this update adjusts the private-files abstraction to
disallow writing to thumbnailer configuration files. Additionally adjust the
private-files, private-files-strict and user-files abstractions to disallow
writes on parent directories of sensitive files.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04
In general, a standard system update will make all the necessary changes.