The remote host is missing an update to libxml2 announced via advisory USN-815-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libxml2 2.6.24.dfsg-1ubuntu1.5 Ubuntu 8.04 LTS: libxml2 2.6.31.dfsg-2ubuntu1.4 Ubuntu 8.10: libxml2 2.6.32.dfsg-4ubuntu1.2 Ubuntu 9.04: libxml2 2.6.32.dfsg-5ubuntu4.2 After a standard system upgrade you need to restart your sessions to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-815-1

It was discovered that libxml2 did not correctly handle root XML document element DTD definitions. If a user were tricked into processing a specially crafted XML document, a remote attacker could cause the application linked against libxml2 to crash, leading to a denial of service. (CVE-2009-2414) It was discovered that libxml2 did not correctly parse Notation and Enumeration attribute types. If a user were tricked into processing a specially crafted XML document, a remote attacker could cause the application linked against libxml2 to crash, leading to a denial of service. (CVE-2009-2416) USN-644-1 fixed a vulnerability in libxml2. This advisory provides the corresponding update for Ubuntu 9.04. Original advisory details: It was discovered that libxml2 did not correctly handle long entity names. If a user were tricked into processing a specially crafted XML document, a remote attacker could execute arbitrary code with user privileges or cause the application linked against libxml2 to crash, leading to a denial of service. (CVE-2008-3529)