funsec mailing list archives

Re: Interview: Ilfak Guilfanov


From: Matthew Murphy <mattmurphy () kc rr com>
Date: Thu, 05 Jan 2006 21:01:41 -0600

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rms () computerbytesman com wrote:
Good interview, but I'm still left wondering why Internet Explorer won't
execute malicuous code when it directly displays a booby-trapped .WMF file
as opposed to the Windows picture/FAX viewer which will execute the
malicous code.  Since both programs presumably use gdi32.dll to display a
.WMF file, why is there be a difference in behavour?

Richard

HDM's tutorial would appear to explain this.  IE is only capable of
displaying WMFs with certain optional headers preceding their content.
These same optional headers take the WMF *out of the context* where
escapes can be used.  This disables, among other things (and there's a
basketful of "other things") SETABORT.  At least, that's how I
understand it.

- --
"Social Darwinism: Try to make something idiot-proof,
nature will provide you with a better idiot."

                                -- Michael Holstein
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