An anonymous reader writes "Steve Gibson alleges that the WMF vulnerability in Windows was neither a bug, nor a feature designed without security in mind, but was actually an intentionally placed backdoor. In a more detailed explanation, Gibson explains that the way SetAbortProc works in metafiles does not bear even the slightest resemblance to the way it works when used by a program while printing. Based on the information presented, it really does look like an intentional backdoor." There's a transcript available of the 'Security Now!' podcast where Gibson discusses this.