The remote host has a web browser installed that is vulnerable to multiple attack vectors.
The remote host is using Firefox. The remote version of this software contains multiple security flaws that can be exploited by a malicious website. An attacker exploiting one of these flaws would need to be able to either convince a remote user to visit a malicious website or convince the remote user to open an HTML email and save an attachment. In addition, this version is vulnerable to a remote flaw that could result in arbitrary code execution. Specifically, if a malicious web page is bookmarked as a sidebar panel, the malicious page may open and inject code into privileged pages. An attacker exploiting this flaw would need to be able to convince a user to both visit and bookmark their malicious web page.
Upgrade to version 1.0.2 or higher.