[Full-Disclosure] EEYE: Windows Shell ZIP File Decompression DUNZIP32.DLL Buffer Overflow Vulnerability

From: Derek Soeder (dsoeder_at_eeye.com)
Date: 10/13/04

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    To: <full-disclosure@lists.netsys.com>
Date: Tue, 12 Oct 2004 21:49:04 -0700

    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
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    Disclaimer
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