=========================================================================Ubuntu Security Notice USN-3247-1
March 28, 2017

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

- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

AppArmor could remove the confinement from some programs.

Software Description:
- apparmor: Linux security system

Details:

Stéphane Graber discovered that AppArmor incorrectly unloaded some profiles
when restarted or upgraded, contrary to expected behavior.

Update instructions:

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

Ubuntu 16.10:
  apparmor                        2.10.95-4ubuntu5.3

Ubuntu 16.04 LTS:
  apparmor                        2.10.95-0ubuntu2.6

Ubuntu 14.04 LTS:
  apparmor                        2.10.95-0ubuntu2.6~14.04.1

Ubuntu 12.04 LTS:
  apparmor                        2.7.102-0ubuntu3.11

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.

References:
  https://ubuntu.com/security/notices/USN-3247-1
  CVE-2017-6507

Package Information:
  https://launchpad.net/ubuntu/+source/apparmor/2.10.95-4ubuntu5.3
  https://launchpad.net/ubuntu/+source/apparmor/2.10.95-0ubuntu2.6
  https://launchpad.net/ubuntu/+source/apparmor/2.10.95-0ubuntu2.6~14.04.1
  https://launchpad.net/ubuntu/+source/apparmor/2.7.102-0ubuntu3.11