JScript bugs in Internet Explorer 5 & 6 create stack faults & invalid page faults in various DLL's.

From: SkyLinedat_private
Date: Fri Dec 14 2001 - 07:57:39 PST

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    I have found a number of errors in JScript in IE 5 & 6 
    which can kill all instances of IE on windows 9x & 
    2000 and can make a windows 9x system fatally 
    instable. Whether this bug is exploitable to gain 
    access on another system is yet unknown because I 
    lack the expertise to find out. The errors will occur 
    when a page containing malicious JScript code is 
    opened in IE. (Active scripting must be turned on for 
    this to work).
    A number of different versions of the bug result in 
    different stack faults and invalid page faults in four 
    different DLL's: 
    - SHLWAPI.DLL Shell Light-weight Utility Library (MS 
    Internet Explorer)
    - MSHTML.DLL Microsoft (R) HTML Viewer (MS 
    Internet Explorer)
    - JSCRIPT.DLL Microsoft (R) JScript (IE or 
    Windows ?)
    - KERNEL32.DLL Win32 Kernel core component 
    (MS Windows)
    Crashing KERNEL32.DLL will bring down the win 9x 
    systems.
    The general form of the code is:
    &ltOBJECT src="invalid resource" 
    onError="this.src='invalid resource';"&gt
    e.g. &ltIMG src="::" onError="this.src='::';"&gt
    Probable cause is the infinite loop that this produces.
    Further details about the bugs can be found on my 
    website, http://spoor12.edup.tudelft.nl/skylined. 
    (Which is under constant revision and construction 
    so don't be surprised if it is somewhat buggie ;)
    



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