The remote host is missing an update to expat announced via advisory USN-890-1.
Details follow:
Jukka Taimisto, Tero Rontti and Rauli Kaksonen discovered that Expat did not properly process malformed XML. If a user or application linked against Expat were tricked into opening a crafted XML file, an attacker could cause a denial of service via application crash. (CVE-2009-2625, CVE-2009-3720)
It was discovered that Expat did not properly process malformed UTF-8 sequences. If a user or application linked against Expat were tricked into opening a crafted XML file, an attacker could cause a denial of service via application crash. (CVE-2009-3560)
Solution: The problem can be corrected by upgrading your system to the following package versions: