IE6 - Crash via DOS device

["morning_wood" <se_cur_ity () hotmail com>]

Oct 30, 2003
Donnie Werner
morning_wood () exploitlabs com

I thought these bugs in Internet Explorer 6 had been fixed...

all of these make use of a local call to a
legacy DOS device, example
( file:///AUX ) as a link, called in an iframe ( XSS ) or used as an IMG
tag.
I tested,  "CON", "PRN", "AUX", "COMx", "LPTx", "CLOCK$" and "NUL"
only AUX and COM1 caused a lockup of Internet Explorer 6

do these links crash your browser?
1. http://exploitlabs.com/files/notices/AUXcrash.html <--- click for links
to crash
2. http://exploitlabs.com/files/notices/AUX-iframe.html <-- click this link
to crash
3. http://exploitlabs.com/files/notices/AUX-img.html <-- click this link to
crash

note: these can be embeded via Cross Site Scripting ( XSS ) to deny service
to a website to those clients trying to connect via affected versions of IE6

Donnie Werner
http://exploit.labs.com
morning_wood () exploitlabs com

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