[NT] Multiple Remote Buffer Overflow in Avirt Soho

From: SecuriTeam (support_at_securiteam.com)
Date: 02/24/04

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Date: 24 Feb 2004 12:52:10 +0200

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      Multiple Remote Buffer Overflow in Avirt Soho
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.avirt.com/> Avirt Soho was "developed for the home or small
    office, Soho installs in minutes! Its intuitive wizards and simple
    interface automate the setup process and make maintenance a snap. Don't
    worry if you're new to networking or Internet sharing - Avirt Soho does
    all the work!". Two buffer overflows have been found in the product
    allowing a remote attacker to cause the product to no longer respond to
    legitimate requests.

    DETAILS

    Vulnerable Systems:
     * Avirt Soho version 4.3

    Exploit:
    To test the vulnerability simply send to the server ( port 1080 ) a string
    like:
    GET aaaa[ 1113 of a ]aaaa

    To test the vulnerability on the web service send to the server ( port
    8080 ) a string like:
    GET %%%%[ 2061 of % ]%%%% HTTP/1.1

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:fdonato@autistici.org>
    Donato Ferrante.

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