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SECURITY - Aug. 2, 2004

Internet Explorer Method Cache Location Variant Trust Leads to Script Execution

Summary
Internet Explorer is "Microsoft's core browser that is a part of any Windows operating system and is the dominant browser currently in the world".

A condition exists in which Internet Explorer can be fooled to execute JavaScript code in a popped-up window. The vulnerability is based on method cache unwarranted trust when redirecting execution to a script function with the same name.

Details
Vulnerable Systems:
* Internet Explorer version 6.0.2800.1106 (even with Windows XP SP1)

Vulnerable Components
* MSHTML.DLL version 6.00.2800.1400

Workaround
Since the vulnerability can be used via any script function call, the only viable option for now is to completely disable scripting in Internet Explorer, or switch to another browser.

http://www.securiteam.com/windowsntfocus/5GP0S20DFE.html

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