The remote host is missing an update to mplayer announced via advisory DSA 1313-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201313-1

Stefan Cornelius and Reimar Doeffinger discovered that the MPlayer movie player performs insufficient boundary checks when accessing CDDB data, which might lead to the execution of arbitrary code. The oldstable distribution (sarge) doesn't include MPlayer packages. For the stable distribution (etch) this problem has been fixed in version 1.0~rc1-12etch1. For the unstable distribution (sid) this problem has been fixed in version 1.0~rc1-14. We recommend that you upgrade your mplayer package.