The remote host is missing an update to file announced via advisory DSA 1343-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201343-1

Colin Percival discovered an integer overflow in file, a file type classification tool, which may lead to the execution of arbitrary code. For the oldstable distribution (sarge) this problem has been fixed in version 4.12-1sarge2. For the stable distribution (etch) this problem has been fixed in version 4.17-5etch2. For the unstable distribution (sid) this problem has been fixed in version 4.21-1. We recommend that you upgrade your file package.