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eEye.ZIP.txt

eEye.ZIP.txt
Posted Oct 24, 2004
Authored by Yuji Ukai | Site eeye.com

eEye Security Advisory - 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.

tags | advisory, overflow, shell
systems | windows
SHA-256 | 74498eeb938601ac386acca23e9c64ceb6dd02a5bcd6488628996a9f230da45b

eEye.ZIP.txt

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Windows Shell ZIP File Decompression DUNZIP32.DLL Buffer Overflow
Vulnerability

Release Date:
October 12, 2004

Date Reported:
August 2, 2004

Severity:
High (Code Execution)

Vendor:
Microsoft

Systems Affected:
Windows XP (SP1 and earlier)
Windows Me

Overview:
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.

Technical 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.

Protection:
Retina Network Security Scanner has been updated to identify this
vulnerability.

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

Credit:
Discovery: Yuji Ukai

Related Links:
Retina Network Security Scanner - Free 15 Day Trial
http://www.eeye.com/html/Products/Retina/download.html

Greetings:
R.Kanai, Y.Watanabe - Welcome to eEye Japan Team, All Black Hat Japan
2004 attendees, and AV2K4 attendees.

Copyright (c) 1998-2004 eEye Digital Security
Permission is hereby granted for the redistribution of this alert
electronically. It is not to be edited in any way without express
consent of eEye. If you wish to reprint the whole or any part of this
alert in any other medium excluding electronic medium, please email
alert@eEye.com for permission.

Disclaimer
The information within this paper may change without notice. Use of this
information constitutes acceptance for use in an AS IS condition. There
are no warranties, implied or express, with regard to this information.
In no event shall the author be liable for any direct or indirect
damages whatsoever arising out of or in connection with the use or
spread of this information. Any use of this information is at the user's
own risk.
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