The remote host is missing updates announced in advisory CLA-2004:863.
Wv[1] is a library which allows access to Microsoft Word files.
iDefense[2] discovered[3] a buffer overflow vulnerability[4] in the wv library which could allow an attacker to execute arbitrary code with the privileges of the user running the vulnerable application.
Solution: The apt tool can be used to perform RPM package upgrades by running 'apt-get update' followed by 'apt-get upgrade'