SANS: WMF (Window Meta File) Vulnerability FAQ

  • Why is this issue so important?

  • The WMF vulnerability uses images (WMF images) to execute arbitrary code. It will execute just by viewing the image. In most cases, you don't have click anything. Even images stored on your system may cause the exploit to be triggered if it is indexed by some indexing software. Viewing a directory in Explorer with 'Icon size' images will cause the exploit to be triggered as well.

  • Is it better to use Firefox or Internet Explorer?

  • Internet Explorer will view the image and trigger the exploit without warning. New versions of Firefox will prompt you before opening the image. However, in most environments this offers little protection given that these are images and are thus considered 'safe'.

  • What versions of Windows are affected?

  • All. Windows 2000, Windows XP, (SP1 and SP2), Windows 2003. All are affected to some extent. Mac OS-X, Unix or BSD is not affected.

Note: If you're still running on Win98/ME, this is a watershed moment: we believe (untested) that your system is vulnerable and there will be no patch from MS. Your mitigation options are very limited. You really need to upgrade. SANS - Internet Storm Center - Cooperative Cyber Threat Monitor And Alert System

Linked by shanmuga Sunday, 1st January 2006 11:05PM