Secunia Security Advisory – Rhys Kidd has reported a vulnerability in l2tpns, which potentially can be exploited by malicious people to compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/52694/sa23230.txt
Source: https://packetstormsecurity.com/files/52694/Secunia-Security-Advisory-23230.html