AppArmor is vulnerable to privilege escalation attacks. An unauthenticated attacker could have increased attack surfaces which would allow privilege escalation due to the use of common logic to handle ‘restart’ operations.
bazaar.launchpad.net/~apparmor-dev/apparmor/master/revision/3647
bazaar.launchpad.net/~apparmor-dev/apparmor/master/revision/3648
www.securityfocus.com/bid/97223
bugs.launchpad.net/apparmor/+bug/1668892
people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-6507.html
security-tracker.debian.org/tracker/CVE-2017-6507