This document serves as a reclassification advisory for the Microsoft Internet Explorer JavaScript Window() DoS vulnerability, originally reported on 31/05/2005.

Contrary to popular beliefs, the aforementioned security issue is susceptible to remote, arbitrary code execution, yielding full system access with the privileges of the underlying user.

I was stumbling around on the web tonight and got hit with a malicious version of this. Fortunately I was running Firefox at the time, where the issue is merely a denial of service (at least as presently understood). Its a remote code execution problem in IE. The perps were trying to shovel adware onto my machine.

Figured I'd mention this here as a public service. People are definately out there exploiting this. Microsoft released patches yesterday. Patch your machine.

If you go to the linked site from a vulnerable host and click on the proof of concept it will launch a copy of calc.exe on your desktop.