This is one of my favorite vulnerabilities:
http://online.securityfocus.com/bid/1503
It's an overflow in the JPEG handler in Netscape.
I don't know of one for GIFs off the top of my head, but the same principle
applies. If there's a viewer with a bug, then there is a possibility that
it can be used to exploit the client.
BB
Roland Postle wrote:
>>GIFs can't exploit your
>>system. Flash files can, just like any executable.
>
> This myth that static data files such as gifs, jpegs and zip files
> /can't/ exploit your system really gets to me. Virus scanners continue
> to scan only 'active' content, but some applications are in such
> widespread use now that it's only a matter of time before a
> vulnerability in say, Winzip's file handling, is exploited in a virus
> that infects .zip files. Or a vulnerability in IE's jpeg module that
> allows jpegs to carry viruses. It's not 'just like any executable', but
> it's not automatically safe either.
Received on Sep 03 2002
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