The remote host is missing an update to vlc announced via advisory DSA 1004-1. Simon Kilvington discovered that specially crafted PNG images can trigger a heap overflow in libavcodec, the multimedia library of ffmpeg, which may lead to the execution of arbitrary code. The vlc media player links statically against libavcodec. The old stable distribution (woody) isn't affected by this problem.
For the stable distribution (sarge) this problem has been fixed in version 0.8.1.svn20050314-1sarge1. For the unstable distribution (sid) this problem has been fixed in version 0.8.4.debian-2. We recommend that you upgrade your vlc package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201004-1