AppArmor could remove the confinement from some programs.
Stéphane Graber discovered that AppArmor incorrectly unloaded some profiles when restarted or upgraded, contrary to expected behavior.
28 March 2017
A security issue affects these releases of Ubuntu and its derivatives:
AppArmor could remove the confinement from some programs.
Stéphane Graber discovered that AppArmor incorrectly unloaded some profiles when restarted or upgraded, contrary to expected behavior.
The problem can be corrected by updating your system to the following package versions:
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.
A new utility, called aa-remove-unknown, was added to assist with profiles that would have been previously unloaded when AppArmor was restarted or upgraded.
Vulmon