The RTSP module in VideoLAN VLC 0.8.6d allows remote attackers to cause a denial of service (crash) via a request without a Transport parameter, which triggers a NULL pointer dereference.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14876
http://www.gentoo.org/security/en/glsa/glsa-200803-13.xml
http://trac.videolan.org/vlc/changeset/22023
http://secunia.com/advisories/29284
http://mailman.videolan.org/pipermail/vlc-devel/2007-September/034722.html