The remote host is missing an update to xine-lib announced via advisory DSA 1472-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201472-1

Luigi Auriemma discovered that the Xine media player library performed insufficient input sanitising during the handling of RTSP streams, which could lead to the execution of arbitrary code. For the unstable distribution (sid), this problem will be fixed soon. For the testing distribution (lenny), this problem has been fixed in version 1.1.8-3+lenny1. For the stable distribution (etch), this problem has been fixed in version 1.1.2+dfsg-5. For the old stable distribution (sarge), this problem has been fixed in version 1.0.1-1sarge6. We recommend that you upgrade your xine-lib packages.