New zero-day WMF exploit.

There's a new zero-day vulnerability related to Windows' image rendering - namely WMF files (Windows Metafiles). Trojan downloaders, available from unionseek(DOT)com, have been actively exploiting this vulnerability. Right now, fully patched Windows XP SP2 machines machines are vulnerable, with no known patch. Note that you can get infected if you visit a web site that has an image file containing the exploit. Internet Explorer users might automatically get infected. Firefox users can get infected if they decide to run or download the image file. The exploit is currently being used to distribute some trojans. Some of these install hoax anti-malware programs. I recommend to do updates of your anti-virus scanners. MS will possibly release soon a solution.