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| A flaw exists in the Toshiba Bluetooth wireless device driver, used by multiple vendors, that allows a remote attacker within wireless range of a Bluetooth device to perform a denial-of-service (DoS) attack or execute arbitrary code at the highest privilege level. |
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Credit:
The information has been provided by David Maynor.
The original article can be found at: http://www.secureworks.com/press/20061011-dell.html
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Vulnerable Systems:
* Toshiba Bluetooth host stack implementations version 3.x
* Toshiba Bluetooth host stack implementations version 4 through 4.00.35, including all shipping OEM versions are vulnerable.
* Toshiba Bluetooth stacks running on 64-bit platforms are not vulnerable.
* Toshiba is the OEM for multiple vendor Bluetooth stacks including, but not limited to:
o Dell Computers
o Sony Vaio
o ASUS Computers and possibly other brands.
Bluetooth is a standards-based wireless technology used for short-range data communications between electronic devices. The vulnerable Bluetooth wireless device drivers are subject to potential attacks through specially crafted Bluetooth packets. An attacker can potentially take advantage of these conditions to cause a memory corruption, a system crash, and/or the execution of arbitrary code at the highest privilege level. An attacker would need to be within approximately 10 meters of the victim. Additionally, an attacker would need the Bluetooth address of the victim s device. Bluetooth addresses are easily enumerated through active scanning if the device allows discovery.
Detection:
Users of Toshiba s Bluetooth stack are encouraged to check the current Bluetooth stack version by selecting:
Version 3.x Device Properties , then General
Version 4.x Options , then General , then Details
Toshiba has advised that security patches are normally offered for all Bluetooth stacks. Please consult the download details document for further information.
Users of Dell Bluetooth products are encouraged to verify the presence and version of their Bluetooth stack by double-clicking on the Bluetooth icon in the system tray to open the Bluetooth client utility
and selecting Help , then About.
Recommendations:
Toshiba has recommended that affected users visit their Bluetooth vendor s website for an updated Bluetooth stack. If a patch is unavailable, please visit the Toshiba Bluetooth website, which offers security updates for all Bluetooth stacks including OEM versions, as well as a Bluetooth Stack Security Pack at: http://aps.toshiba-tro.de/bluetooth/redirect.php?page=pages/download.php
Users of Dell Latitude D820/D620/D420/D520 are asked to verify the version of their Bluetooth stack using the method described above. If your version is not 4.00.22(D) SP2 or newer, then it is recommended that users upgrade to the latest driver versions located at http://www.support.dell.com/.
Users of Dell Latitude D810/D610/D410/D510/X1 are asked to verify the version of their Bluetooth stack using the method described above. If your version is not 4.00.20(D) SP2 or newer, then it is recommended that users upgrade to the latest driver versions to be made available by November 4th, 2006 at http://www.support.dell.com/.
Bluetooth device users should be set to non-discoverable mode during normal operations to reduce risk from this and other potential future Bluetooth attacks.
References:
Toshiba: Bluetooth Download Page
Dell Support
Buffer Overrun in Toshiba Bluetooth Stack for Windows
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