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Intel Keyboard Buffer Information Disclosure Vulnerability

Intel ID:  INTEL-SA-00016
Product family:  Intel® Desktop and Intel® Mobile Boards
Impact of vulnerability Information Disclosure
Severity rating Moderate
Original release:  Aug 25, 2008
Last revised:  Aug 25, 2008

Summary: 

Specific Intel BIOS's fail to sanitize user input entered during the Power On Self Test, POST, process. Under certain situations this issue could potentially result in a disclosure of information.

Description: 

A new BIOS is available on select Intel motherboards to ensure proper sanitization of user input entered during the Power On Self Test, POST, process. This new BIOS will properly clear user input before the launch of the Operating System. This new BIOS will prevent exploitation by a malicious local user or software running on the local system to expose pre-execution passwords.

Affected products: 

DQ35JO, DQ35MP, DG35EC, DP35DP, DG33FB, DG33BU, DG33TL, DX38BT, MGM965TW (Mobile) and MGM965JB (Mobile).

Recommendations: 

Recommendations:

While Intel is not aware of any use of the vulnerability described in this advisory, Intel has made changes to the BIOS firmware of affected products to prevent this issue. 

To determine if you are at risk follow these steps:

1. Reboot your system.

2. Hit F2 to enter setup

3. The BIOS version will be on the first setup page displayed.

4. Look at the first portion of the BIOS version. For example - JOQ3510J.86A.0942.2007.1210.2204.

5. Then look at the date string section - JOQ3510J.86A.0942.2007.1210.2204.

6. If your BIOS has one of the numbers listed in the first section below and the date code section is older you need to update your BIOS.

For the Intel products listed in the Affected Products table, Intel has made available updated BIOS firmware per the table below. The updated BIOS firmware is available at http://support.intel.com. From this web page select 'Download Center'. On the 'Search Downloads' line, enter the affected product name (for example DG33BU) and click search. Click on the found product, select your operating system and click 'Go'. Next click on the BIOS title, then follow the instructions on the download page for downloading and installing the BIOS update. Several options are available. For detailed instructions on updating your BIOS refer to http://www.intel.com/support/motherboards/desktop/sb/CS-022312.htm.

Available BIOS Updates:

DQ35JO

JOQ3510J.86A.0942.2008.0807.1958

DQ35MP

JOQ3510J.86A.0942.2008.0807.1958

DP35DP

DPP3510J.86A.0484.2008.0805.2031

DG33FB

DPP3510J.86A.0484.2008.0805.2031

DG33BU

DPP3510J.86A.0484.2008.0805.2031

DG33TL

DPP3510J.86A.0484.2008.0805.2031

MGM965TW (Mobile)

TW96510J.86A.1157.2008.0730.1429

D945GCPE

PE94510M.86A.0065.2008.0801.1803

DX38BT

BTX3810J.86A.1814.2008.0807.2334

Acknowledgements: 

Intel would like to thank the following for working with us: Jonathan Brossard, http://www.ivizsecurity.com/index.php, Lead Security Engineer iViZ Techno Solutions Pvt. Ltd.

Revision history:

Revision

Date

Description

1.0

25-August-2008

Initial Release

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