The Mozzarella Foundation has issued a warning that some versions of FireFox, Thunderbird and SeaMonkey needs a patch.
The bug, described as “critical” means that your software will crash with evidence of memory corruption.
The problem has already been fixed in some versions of FireFix, Thunderbird and SeaMonkey – and there is a workaround.
The bug was found by Mozilla developers. The advice says: “We presume that with enough effort, at leastsome of these could be exploited to run arbitrary code”.
The advice is here.