The remote host is missing an update to cupsys announced via advisory DSA 1625-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201625-1

Several remote vulnerabilities have been discovered in the Common Unix Printing System (CUPS). The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2008-0053 Buffer overflows in the HP-GL input filter allowed to possibly run arbitrary code through crafted HP-GL files. CVE-2008-1373 Buffer overflow in the GIF filter allowed to possibly run arbitrary code through crafted GIF files. CVE-2008-1722 Integer overflows in the PNG filter allowed to possibly run arbitrary code through crafted PNG files. For the stable distribution (etch), these problems have been fixed in version 1.2.7-4etch4 of package cupsys. For the testing (lenny) and unstable distribution (sid), these problems have been fixed in version 1.3.7-2 of package cups. We recommend that you upgrade your cupsys package.