The remote host is vulnerable to a flaw that allows attackers to retrieve sensitive files or data.
The remote host seems to be running Mozilla or Firefox for Linux. It is reported that versions up to and include 0.9.3 of Firefox and up to and including 1.7.2 of Mozilla are prone to an improper file permission issue in the installation process. Upon installation, several files are created with world-writable permissions. An attacker with interactive access to the host may corrupt these scripts and programs during the installation process. This vulnerability exists only in the Linux archive version. If you installed Firefox using your Linux distribution packaging system, the vulnerability is likely not present on the remote system.
Upgrade or patch according to vendor recommendations.