[Full-Disclosure] ptl-2004-03: WIDCOMM Bluetooth Connectivity Software Buffer Overflows

From: Pentest Security Advisories (alerts_at_pentest.co.uk)
Date: 08/11/04

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    To: <full-disclosure@lists.netsys.com>, <bugtraq@securityfocus.com>, <vulnwatch@vulnwatch.org>
    Date: Wed, 11 Aug 2004 12:20:00 +0100

    Pentest Limited Security Advisory

    WIDCOMM Bluetooth Connectivity Software Buffer Overflows

    Advisory Details
    Title: WIDCOMM Bluetooth Connectivity Software Buffer Overflows
    Announcement date: 11 August 2004
    Advisory Reference: ptl-2004-03
    CVE Name: CAN-2004-0775
    Products: WIDCOMM Bluetooth Connectivity Software
    Vulnerability Type : Buffer Overflow
    Vendor-URL: http://www.widcomm.com
    Vendor-Status: Fixed in release 3.0
    Remotely Exploitable: Yes
    Locally Exploitable: N/A
    Advisory URL: http://www.pentest.co.uk/documents/ptl-2004-03.html

    Vulnerability Description
    WIDCOMM's products provides a full range of Bluetooth connectivity
    solutions for PCs, PDAs, mobile phones, headsets, digital cameras,
    access points, and various output devices.

    An unauthenticated remote attacker can submit various malformed service
    requests via Bluetooth, triggering a buffer overflow and executing
    arbitrary code on the vulnerable device.

    On Windows platforms this allows arbitrary code execution under the
    context of the currently logged on user account.

    Vulnerable Versions

    WIDCOMM supply their Bluetooth Communications software to other
    companies to allow them to integrate Bluetooth technology into their
    devices. They also supply Bluetooth SDK's to enable developers to create
    applications that use Bluetooth. Therefore it may not be immediately
    apparent that you are using the WIDCOMM Bluetooth software and version
    numbers may vary.

    WIDCOMM's website (http://www.widcomm.com/Partners/index.asp) reports
    the following companies as customers or partners with WIDCOMM:

    Samsung Electro-Mechanics
    Texas Instruments
    Compaq Computer Corporation
    National Semiconductor
    Matsushita Electric Industrial Co., Ltd.
    Wistron NeWeb Corporation
    TDK Systems Europe
    Cambridge Silicon Radio
    Broadcom Corporation
    LG Innotek
    Fujitsu Siemens Computers
    Silicon Wave
    Seiko Instruments Inc.
    Fujitsu Media Devices Limited
    OKI Electric Industry Co. Ltd.
    Conexant Systems, Inc.

    Pentest Limited have tested for the reported vulnerabilities against
    BTStackServer version and on both Windows XP and
    Windows 98 which ships with MSI Bluetooth Dongles. We have also tested
    this against an HP IPAQ 5450 running WinCE 3.0 with Bluetooth software

    Pentest Limited have also written a proof of concept exploit for Windows

    Whilst the above platforms are the only platforms tested and confirmed
    to be exploitable by Pentest Limited, discussions with the vendor lead
    us to believe that are all versions prior to version BTW & BT-CE/PPC 3.0
    are affected by this vulnerability.

    WIDCOMM has not confirmed whether BT-PPC/Phone Edition, BT-Smartphone,
    BTE-Mobile or BTE are vulnerable.

    Vendor Status
    14-11-2003 - Initial Pentest Limited Notification
    14-11-2003 - Notification acknowledged by WIDCOMM, request more detail
    20-11-2003 - Pentest notify WIDCOMM of another vulnerability
    06-01-2004 - Pentest send chase up Email without reply
    13-01-2004 - Another email
    13-01-2004 - WIDCOMM reply saying they are still working on it
    21-01-2004 - Pentest email WIDCOMM that they have written a POC exploit
    23-01-2004 - WIDCOMM reply saying they have resolved issue and fix
                 will be available in next release.
    10-02-2004 - Pentest ask for an update on expected release date
    11-02-2004 - WIDCOMM plan February/early March realease date
    29-03-2004 - Pentest ask for update
    12-05-2004 - Pentest ask for update
    12-07-2004 - Pentest send chase up Email without reply
    26-07-2004 - Pentest ask whether a patches will be released for older
    03-08-2004 - WIDCOMM respond. No date set for new release and no patch
                 will be made available for older versions.


    Until version 3 of the WIDCOMM software becomes available from WIDCOMM
    or their customers/partners Pentest Limited recommend that end users
    stop using the vulnerable WIDCOMM Bluetooth software or set their
    Bluetooth device configuration to be non-discoverable or hidden. This
    will not stop the device from being vulnerable but it may limit the
    These vulnerabilities were discovered by Mark Rowe and Matt Moore from
    Pentest Limited.
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