The latest security information on Intel® products.

New BIOS available for Intel® Desktop Board products BIOS to prevent unauthorized downgrading to a previous BIOS version.

Intel ID INTEL-SA-00019
Product family Intel® Desktop Boards
Impact of vulnerability Elevation of Privilege
Severity rating Important
Original release Oct 16, 2009
Last revised Oct 16, 2009

Summary: 

New BIOS is available for Intel® Desktop Board products BIOS to prevent downgrading to a previous BIOS version without supervisor/admin permission.

Description: 

To prevent an unauthorized user from flashing Intel® Desktop Board products to a previous BIOS version without an explicit confirmation from the supervisor/user, new BIOS versions are available. Older BIOS versions may be less secure than latest versions.

Affected products: 

Intel® Desktop Board products:             

 

D5400XS, DX58SO, DX48BT2, DX38BT, DP45SG, DQ45CB, DQ45EK, DQ43AP, DB43LD, DG41MJ, DG41RQ, DG41TY, DG45ID, DG45FC, DG43NB, DP43TF, DQ35EC, DQ35JO, DQ35MP, DG35EC, DG33BU, DG33FB, DG33TL, DG31GL, DG31PR, DP35DP, D945GSEJT, D945GCLF, D945GCLF2

Recommendations: 

While Intel is not aware of any use of the vulnerabilities described in this advisory, Intel has made changes to the BIOS of Intel® Desktop Boards to mitigate these issues. A password is now required in order to downgrade to a previous BIOS version providing a user/supervisor password is set. It is highly recommended to apply these updates to affected motherboards

.

To determine if you need this BIOS update check the BIOS version string. If the number is older than listed in the chart for your motherboard below you need to apply the update.

 

1) During boot, enter the BIOS setup by pressing F2.

2) Check the Main menu.

3) The 4-digit number after the '86A' or '86I' is the current BIOS version, as in this example: MQ96510H.86A.1663.2007.0319.1957

4) Press Escape to exit BIOS Setup

 

For the Intel products listed in the Affected Products table, Intel has made available updated BIOS per the table below.  The updated BIOS is available at http://www.intel.com/p/en_US/support.  On the 'Advanced Search' line, enter the affected product name (for example DG33BU) and click Search Support. Click on the found product, make sure you're under the support tab and select BIOS updates. 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.

Desktop Board

Fix included in this version or higher

D5400XS

XS54010J.86A.1338

DX58SO                     

SOX5810J.86A.4196

DX48BT2                   

BTX3810J.86A.2000

DX38BT                     

BTX3810J.86A.2000

DP45SG                      

SGP4510H.86A.0118

DQ45CB                     

CBQ4510H.86A.0087

DQ45EK                     

CBQ4510H.86A.0087

DQ43AP                     

APQ4310H.86A.0025

DB43LD                     

LDB4310H.86A.0031

DG41MJ                     

MJG4110H.86A.0004

DG41RQ                    

RQG4110H.86A.0011

DG41TY                     

TYG4110H.86A.0030

DG45ID                      

IDG4510H.86A.0105

DG45FC                     

IDG4510H.86A.0105

DG43NB                    

NBG4310H.86A.0087

DP43TF                      

NBG4310H.86A.0087

DQ35EC

ECG3510M.86A.0117.2009.0625.1315

DQ35JO                     

JOQ3510J.86A.1108

DQ35MP                    

JOQ3510J.86A.1108

DG33BU                    

DPP3510J.86A.0572

DG33FB                     

DPP3510J.86A.0572

DG33TL                     

DPP3510J.86A.0572

DP35DP                      

DPP3510J.86A.0572

D945GSEJT                

JT94510H.86A.0032

D945GCLF                 

LF94510J.86A.0183

D945GCLF2               

LF94510J.86A.0183

Acknowledgements: 

Intel would like to thank Alexander Tereshkin, Rafal Wojtczuk, and Joanna Rutkowska from Invisible Things Lab, http://invisiblethingslab.com, for working with us.

Revision history:

Revision

Date

Description

1.0

20-November-2017

Initial Release

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