Rhys Kidd has reported a vulnerability in l2tpns, which potentially can be exploited by malicious people to compromise a vulnerable system.
The vulnerability is caused due to a boundary error within the "cluster_process_heartbeat()" function in cluster.c. This can be exploited to cause a buffer overflow by sending a specially crafted heartbeat packet.
The vulnerability is reported in versions prior to 2.1.21.
Solution: Update to version 2.1.21.
Provided and/or discovered by: Rhys Kidd
Original Advisory: http://sourceforge.net/project/shownotes.php?group_id=97282&release_id=468202
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