The remote host is missing an update to camlimages announced via advisory DSA 1857-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201857-1

Tielei Wang discovered that CamlImages, an open source image processing library, suffers from several integer overflows which may lead to a potentially exploitable heap overflow and result in arbitrary code execution. This advisory addresses issues with the reading of JPEG and GIF Images, while DSA 1832-1 addressed the issue with PNG images. For the oldstable distribution (etch), this problem has been fixed in version 2.20-8+etch2. For the stable distribution (lenny), this problem has been fixed in version 1:2.2.0-4+lenny2. For the unstable distribution (sid), this problem has been fixed in version 1:3.0.1-3. We recommend that you upgrade your camlimages package.