[NT] ALZip Multiple Archive Handling Buffer Overflow

From: SecuriTeam (support_at_securiteam.com)
Date: 10/06/05

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Date: 6 Oct 2005 11:06:13 +0200

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      ALZip Multiple Archive Handling Buffer Overflow
    ------------------------------------------------------------------------

    SUMMARY

    " <http://www.altools.net/Default.aspx?tabid=47> ALZip is the easiest to
    use, most powerful, and by far the cutest compression utility available."

    A buffer overflow vulnerability in ALZip allows attackers to cause the
    program to execute arbitrary code.

    DETAILS

    Vulnerable Systems:
     * ALZip version 6.12 (Korean)
     * ALZip version 6.1 (International)
     * ALZip version 5.52 (English)

    Immune Systems:
     * ALZip version 6.13 (International)

    The vulnerability is caused due to multiple boundary errors when reading
    the filename of a compressed file from ALZ, ARJ, ZIP, UUE or XXE archives.
    This can be exploited to cause a stack-based buffer overflow (ALZ), or a
    heap-based buffer overflow (ARJ / ZIP / UUE / XXE).

    Successful exploitation allows execution of arbitrary code when a
    malicious ALZ / ARJ archive is opened, or when a ZIP / UUE / XXE archive
    is extracted.

    Disclosure Timeline:
    19/09/2005 - Initial vendor notification
    20/09/2005 - Initial vendor reply
    28/09/2005 - Notified by vendor that fixed version has been released
    05/10/2005 - Public disclosure

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:vuln@secunia.com> Secunia
    Research.
    The original article can be found at:
    <http://secunia.com/advisories/16847/>
    http://secunia.com/advisories/16847/

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