Exploit code unpicks IE flaw
SP2 no defence
Hackers have created a potent exploit for a six-month old vulnerability in Internet Explorer which was previously believed to be only a Denial of Service risk. A fresh exploit posted on computerterrorism.com proves that the security bug can be exploited to gain system access, even on systems running Windows XP with Service Pack 2. The flaw stems from a failure by IE to properly handle requests to the window() object.
Microsoft's holding statement on the issue can be found here. ®