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Insecure Library Loading
Highly critical

Microsoft Windows DirectShow AVI Handling Vulnerability

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Description


eEye Digital Security has been reported a vulnerability in Microsoft Windows DirectShow, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a validation error in QUARTZ.DLL when decoding AVI movie files. This can be exploited to write a null byte to an arbitrary memory location e.g. the header of the heap block.

Successful exploitation allows arbitrary code execution, but requires that the user open a malicious AVI file with specially crafted value in the length field of the "strn" element.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Fang Xing, eEye Digital Security.

Original Advisory:
MS05-050 (KB904706):
http://www.microsoft.com/technet/security/Bulletin/MS05-050.mspx

eEye Digital Security:
http://www.eeye.com/html/research/advisories/AD20051011a.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Microsoft Windows DirectShow AVI Handling Vulnerability

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