Intel® Enterprise Southbridge 2 Baseboard Management Controller Denial of Service

Intel ID:  INTEL-SA-00012
Product family:  Intel® Enterprise Southbridge 2 Baseboard Management Controller
Impact of vulnerability Denial of Service
Severity rating Moderate
Original release:  Jan 19, 2007
Last revised:  Jan 19, 2007
Summary: 

A denial of service vulnerability exists in the Intel® Enterprise Southbridge 2 Baseboard Management Controller which may allow malicious users to connect to a server system within a local area network and issue any Intelligent Platform Management Interface command. If proper external network access procedures are followed the vulnerability is limited to internal access within a local network.

Description: 

A denial of service vulnerability exists in the Intel® Enterprise Southbridge 2 Baseboard Management Controller which could be locally exploited by malicious users. The Baseboard Management Controller contains firmware which provides server management access to a server across a local area network.  The Baseboard Management Controller firmware follows the Intelligent Platform Management Interface specification for network access. This specification has released several revisions: revision 1.5 and more recently revision 2.0. The vulnerability is exposed only when software utilities use Intelligent Platform Management Interface revision 1.5 for network access. The Intelligent Platform Management Interface must be enabled by IT professionals who configure the interface before network access is available.

This vulnerability is limited to certain Intel® Server products and OEM customers of Intel® Enterprise Southbridge 2 firmware. The vulnerability does not expose the server operating system or data files.

A variety of open source management software utilities are available for download from various locations on the internet. Some allow Intelligent Platform Management Interface revision 1.5 access. These tools expose a firmware flaw which allows insecure access to the Baseboard Management Controller for Intelligent Platform Management Interface commands.

Affected products: 

Product Version
All SKUs of Intel® Server Board S5000XAL & S5000PAL All firmware releases 56 and prior
All SKUs of Intel® Server Board S5000PSL All firmware releases 56 and prior
All SKUs of Intel® Server Board S5000XVN All firmware releases 56 and prior
All SKUs of Intel® Server Board S5000VCL All firmware releases 56 and prior
All SKUs of Intel® Server Board S5000VSA All firmware releases 56 and prior
All SKUs of Intel® Server Board SC5400RA All firmware releases 56 and prior
OEM Firmware for Intel Enterprise Southbridge Baseboard Management Controller  Please check with your OEM for the correct version of the BMC FW containing the fix

To identify if your server is affected by this Security Advisory use the following steps:

  • Reboot the server and depress the F2 key during boot up. This will take you into the BIOS setup screen.
  • On the “Main” page, locate the “Platform ID” field. If this field lists one of the servers above the platform could be affected by this Advisory. Continue with the following steps to confirm.
  • Move to the “Server Management” page.  Select the “System Information” option.
  • Locate and view the line for “BMC Firmware Revision”. If the display indicates “0.56” or prior your system is affected by this Security Advisory.<\li>
  • Recommendations: 

    While Intel is not aware of any public announcements or malicious use of the vulnerability described in this advisory Intel has made changes to the Baseboard Management Controller firmware to eliminate the vulnerability. Intel has contacted the OEMs who integrate the Intel® Enterprise Southbridge 2 component into their server board designs and has provided the necessary updates for their implementation. For the Intel® Server Boards listed in the Affected Products, Intel has made available updated Baseboard Management Controller firmware release 57. The update is available on Intel Business Link for OEMs and Resellers and on http://support.intel.com for other users. From the main web page select the Intel server identified above using the “Browse by Product” menu. After selecting the Intel Server, go to the “Software and Drivers” menu option and select “BIOS/Firmware, Driver and Utilities Download”.

    Acknowledgements: 

    Intel would like to thank Keith Josephson of ION Computer Systems, Inc for working with us.

    Revision history: 

    Revision
    Date
    Description
    1.0
    19-January-2007
    Initial revision.


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