Referenced CVEs: 
CVE-2006-6772
Description: 
=========================================================== Ubuntu Security Notice USN-399-1 January 03, 2007 w3m vulnerability CVE-2006-6772 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 5.10 Ubuntu 6.06 LTS Ubuntu 6.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 5.10: w3m 0.5.1-3ubuntu1.1 Ubuntu 6.06 LTS: w3m 0.5.1-4ubuntu2.6.06 Ubuntu 6.10: w3m 0.5.1-4ubuntu2.6.10 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: A format string vulnerability was discovered in w3m. If a user were tricked into visiting an HTTPS URL protected by a specially crafted SSL certificate, an attacker could execute arbitrary code with user privileges.