QuickTime 7.3.1 zero-day vulnerability

We got wind of a vulnerability in QuickTime 7.3.1 that allows the execution of malicious code on a victim’s computer. Luckily, Apple has just released QuickTime 7.4 (as well as a new version of iTunes) as a result of the newest iTunes Music Store/Apple TV/video rental-related announcements at MacWorld. Suffice it to say, Apple’s Software Update utility is your friend.