Quicktime 7.3.1 fixes RTSP vulnerability
Apple has just released QuickTime 7.3.1 which addresses that nasty RTSP vulnerability recently discovered (and discovered with zero day exploit code no less!). This update also fixes 2 other security problems with QuickTime. It looks like Flash is being handled in a safer way, and a heap buffer overflow has been fixed. Apple suggests all QT 7 users install this update.
Quicktime 7.3.1 is available for:
Read the full release notes for the gory details.