This indicates an attack attempt to exploit a Buffer Overflow vulnerability in VideoLAN VLC media player.
The vulnerability is due to an error in the application while handling a malformed RTSP request or response. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application.
VideoLAN VLC Media Player 2.0.0
VideoLAN VLC Media Player 2.1.0
VideoLAN VLC Media Player 2.1.1
Live555 liblivemedia prior to 2013.11.29
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply patch, available from the website.