CVE-2017-11565

debian/tor.init in the Debian tor_0.2.9.11-1~deb9u1 package for Tor was
designed to execute aa-exec from the standard system pathname if the
apparmor package is installed, but implements this incorrectly (with a
wrong assumption that the specific pathname would remain the same forever),
which allows attackers to bypass intended AppArmor restrictions by
leveraging the silent loss of this protection mechanism. NOTE: this does
not affect systems, such as default Debian stretch installations, on which
Tor startup relies on a systemd unit file (instead of this tor.init
script).

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869153&gt;