[NT] 7-Zip ARJ Archive Buffer Overflow

From: SecuriTeam (support_at_securiteam.com)
Date: 09/29/05

  • Next message: SecuriTeam: "[REVS] Exploiting kmalloc Based Buffer Overflows"
    To: list@securiteam.com
    Date: 29 Sep 2005 10:52:15 +0200

    The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
    - - promotion

    The SecuriTeam alerts list - Free, Accurate, Independent.

    Get your security news from a reliable source.

    - - - - - - - - -

      7-Zip ARJ Archive Buffer Overflow


    " <http://www.7-zip.org/> 7-Zip is a file archiver with high compression

    7-Zip vulnerable to a buffer overflow that allow attackers to execute
    arbitrary code by sending the victim a malicious .ARJ archive file.


    Vulnerable Systems:
     * 7-Zip version 3.13
     * 7-Zip version 4.23
     * 7-Zip version 4.26 BETA

    Immune Systems:
     * 7-Zip version 4.27 BETA

    The vulnerability is caused due to a boundary error when handling an ARJ
    block that is larger than 2600 bytes. This can be exploited to cause a
    stack-based buffer overflow when a specially crafted ARJ file is opened.

    Successful exploitation allows arbitrary code execution.

    Disclosure Timeline:
    05/09/2005 - Initial vendor notification
    05/09/2005 - Initial vendor reply
    21/09/2005 - Vendor released fixed version
    23/09/2005 - Public disclosure


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


    This bulletin is sent to members of the SecuriTeam mailing list.
    To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
    In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com


    The information in this bulletin is provided "AS IS" without warranty of any kind.
    In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.

  • Next message: SecuriTeam: "[REVS] Exploiting kmalloc Based Buffer Overflows"