The Security Mentor

This is another of the problems where browsing to the wrong web page can cost you control over your computer.

Watchguard has details.

All the usual advice applies: use a safer browser, stay out of bad neighborhoods on the web, and if you're still using IE then install the fix as soon as it ocmes out (Microsoft is already testing their fix to make sure it doesn't break anything else).

No reports yet of bad guys actually using the newly discovered attack.