[NT] Windows Shell ZIP File Decompression DUNZIP32.DLL Buffer Overflow

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Date: 13 Oct 2004 18:03:01 +0200

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  Windows Shell ZIP File Decompression DUNZIP32.DLL Buffer Overflow
------------------------------------------------------------------------

SUMMARY

eEye Digital Security has discovered a buffer overflow in DUNZIP32.DLL, a
module that offers support for ZIP compressed folders in the Windows
shell. An exploitable buffer overflow occurs when a user opens a ZIP
folder that contains a long file name.

DETAILS

This buffer overflow is triggered by an integer overflow. When a ZIP file
containing a long file name (greater than around 0x8000 bytes) is opened
in the Windows shell as a ZIP compressed folder, a stack-based buffer
overflow occurs, allowing an exception handler to be overwritten and EIP
to be hijacked.

Vendor Status:
Microsoft has released a patch for this vulnerability. The patch is
available at:
<http://www.microsoft.com/technet/security/bulletin/MS04-034.mspx>
http://www.microsoft.com/technet/security/bulletin/MS04-034.mspx

ADDITIONAL INFORMATION

The information has been provided by <mailto:dsoeder@eeye.com> Derek
Soeder.
The original article can be found at:
<http://www.eeye.com/html/research/advisories/AD20041012A.html>
http://www.eeye.com/html/research/advisories/AD20041012A.html

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