The remote host is vulnerable to a heap overflow.
The remote host is using Mozilla. The remote version of this software is vulnerable to a heap overflow against its NNTP functionality. This may allow an attacker to execute arbitrary code on the remote host. To exploit this flaw, an attacker would need to set up a rogue website and lure a victim on the remote host into visiting it.
Upgrade to Mozilla 1.7.5 or higher.