[NEWS] URL Parsing and Plain Text Password disclosure in Best Buy Employee Toolkit Software

From: SecuriTeam (support_at_securiteam.com)
Date: 08/24/03

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    To: list@securiteam.com
    Date: 24 Aug 2003 16:52:21 +0200

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      URL Parsing and Plain Text Password disclosure in Best Buy Employee
    Toolkit Software


    Best Buy Employee Toolkit Interactive is a software program used
    nationally by Best Buy Terminal Systems. The software allows employees the
    ability to check multiple systems throughout the internal network. A URL
    Parsing vulnerability in the configuration screen could allow an attacker
    to execute a command shell interface and hijack certain network
    connections or read plain-text passwords.


    URL Parsing
    By pressing CTRL+SHIFT within the Employee Toolkit software and clicking
    on the exit button, a logged in user is given access to the Toolkit's
    configuration screen. An area within the configuration screen allows a
    logged in user to enter a URL. There are no bounds checking on what is
    entered in the URL area and an attacker could use this to execute a local
    command shell or execute other programs locally stored.

    Plain-text Password Disclosure
    Once an attacker has executed a local command shell, they then have access
    to the root directory that houses a batch file that remotely mounts the
    Store's central server. The batch file uses the 'net use' command to map
    the server's drive and holds the password for the administrator of the
    central server in plain text.

    By combining the trickery of both the URL Parsing vulnerability and the
    plain-text password disclosure, an attacker could execute telnet to
    remotely log into the central server as the administrator.

    Finding the servers on the local area network is as easy as executing the
    'net view' command at command shell. Another method for finding these
    servers is to open a page within the employee toolkit and pressing CTRL+P
    to bring up the printing interface. Choose to print the text to a file
    then click the network button. This will bring up all of the computers
    connected to the Best Buy network.

    Vendor Status:
    05/05/2003 - Best Buy notified of vulnerability.
    06/12/2003 - Best Buy coordinates with IBM to release a fix; Patch
    06/12/2003 - Best Buy notified of patch ineffectiveness, I was told
    vulnerability was not a serious problem.
    07/27/2003 - Best Buy notified again of vulnerability and its impact.
    08/14/2003 - No Response from Best Buy.
    08/14/2003 - Public Disclosure.


    The information has been provided by <mailto:cmthemc@yahoo.com> cm`.


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