[NT] Warrior Kings: Battles Fromat String

From: SecuriTeam (support_at_securiteam.com)
Date: 05/26/05

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Date: 26 May 2005 18:18:26 +0200

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      Warrior Kings: Battles Fromat String
    ------------------------------------------------------------------------

    SUMMARY

    Warrior Kings: Battles is "a real-time strategy game developed by Black
    Cactus (http://www.blackcactus.co.uk) and released in March 2003. The game
    is published by Empire Interactive and Strategy First. Warrior Kings
    instead is published by Microids and Empire Interactive and has been
    released exactly one year before its successor".

    A format string vulnerability exists in Warrior Kings and its successor
    Warrior Kings: Battles, exploiting this vulnerability allows arbitrary
    code execution on vulnerable game server.

    DETAILS

    Vulnerable Systems:
     * Warrior Kings: Battles version 1.23 and prior
     * Warrior Kings version 1.3 and prior

    The game is affected by a format string bug in the function used to
    visualize the text on the screen. The best and simplest way to exploit the
    bug is through a malformed nickname. The only limitation is that the
    attacker cannot exploit the bug if the server is locked.

    A partial join packet causes the crash of the server due to the access to
    a NULL pointer. Only Warrior Kings Battles seems affected by this problem.

    Proof of concepts:
     <http://aluigi.altervista.org/poc/wkbbugs.zip>
    http://aluigi.altervista.org/poc/wkbbugs.zip
     <http://aluigi.altervista.org/poc/warkingsfs.zip>
    http://aluigi.altervista.org/poc/warkingsfs.zip

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:aluigi@autistici.org> Luigi
    Auriemma.
    The original article can be found at: <http://aluigi.altervista.org>
    http://aluigi.altervista.org

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