The remote host is missing an update to cfs announced via advisory DSA 1138-1. Carlo Contavalli discovered an integer overflow in CFS, a cryptographic filesystem, which allows local users to crash the encryption daemon.
For the stable distribution (sarge) this problem has been fixed in version 1.4.1-15sarge1. For the unstable distribution (sid) this problem has been fixed in version 1.4.1-17. We recommend that you upgrade your cfs package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201138-1