The remote host is missing an update to gnome-gv announced via advisory DSA 179-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20179-1

Zen-parse discovered a buffer overflow in gv, a PostScript and PDF viewer for X11. The same code is present in gnome-gv. This problem is triggered by scanning the PostScript file and can be exploited by an attacker sending a malformed PostScript or PDF file. The attacker is able to cause arbitrary code to be run with the privileges of the victim. This problem has been fixed in version 1.1.96-3.1 for the current stable distribution (woody), in version 0.82-2.1 for the old stable distribution (potato) and version 1.99.7-9 for the unstable distribution (sid). We recommend that you upgrade your gnome-gv package.