Debian Security Advisory 649-1 – A buffer overflow has been discovered in xtrlock, a minimal X display lock program which can be exploited by a malicious local attacker to crash the lock program and take over the desktop session.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/35842/dsa-649.txt
Source: https://packetstormsecurity.com/files/35842/dsa-649.txt.html