The remote host is missing an update to gpdf announced via advisory DSA 982-1. Derek Noonburg has fixed several potential vulnerabilities in xpdf, which are also present in gpdf, the Portable Document Format (PDF) viewer with Gtk bindings. The old stable distribution (woody) does not contain gpdf packages.

For the stable distribution (sarge) these problems have been fixed in version 2.8.2-1.2sarge4. For the unstable distribution (sid) these problems will be fixed soon. We recommend that you upgrade your gpdf package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20982-1