[USN-3247-1] AppArmor vulnerability

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

apparmor vulnerability
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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:
http://www.ubuntu.com/usn/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