The latest security information on Intel® products.

Low Entropy RSA Issue in Intel EPSD Baseboard Management Controller (BMC) Firmware

Intel ID:  INTEL-SA-00031
Product family:  Intel Server Board S1200, S2600, S3420, S5500, S5600 Family
Impact of Vulnurability: Denial of Service
Severity rating: Moderate
Original release:  Jul 03, 2012
Last revised:  Jul 03, 2012

Summary: 

There is a potential security vulnerability related to the improper generation of RSA encryption keys in EPSD Baseboard Management Controller (BMC) firmware. Intel is releasing updated versions of the BMC firmware to mitigate the potential vulnerability.

Description: 

There is a potential security vulnerability related to the improper generation of RSA encryption keys in EPSD Baseboard Management Controller (BMC) firmware. This potential vulnerability entails an attacker who might intercept on-going communication between the BMC web-server and user (active man-in-the-middle), and cause a temporary denial of service, after obtaining the private key. Intel is releasing updated versions of the BMC FW to mitigate the potential vulnerability. In brief, the technical improvements include modifying the random number generation mechanism to avoid factorable RSA public keys. As of the date of this advisory, Intel is not aware of any active exploits of this potential vulnerability.

Affected products:

Generation

Product name

Latest BMC firmware version

Romley

Intel® Server board S2600CP family

Intel® Server system P4000CP family

1.10

Intel® Server board S2600JF family

Intel® Server system H2000JF family

1.10

Intel® Server board S2600GZ/GL

Intel® Server system R1000GZ/GL product family

Intel® Server system R2000GZ/GL product family

1.10

Intel® Workstation board W2600CR family

Intel® Server board S2600IP family

Intel® Workstation system P4000CR family

Intel® Server system P4000IP family

1.10

Intel® Server board S2600CO family

1.10

Intel® Server board S2600WP family

Intel® Server system H2000WP family

1.10

Intel® Server board S2400SC

Intel® Server system P4000SC family

1.10

Intel® Server board S2400LP family

Intel® Server System H2000LP family

1.10

Intel® Server board S2400GP family

Intel® Server system P4000GP family

1.10

Foxhollow

Intel® Server board S3420GPLC/LX/RX

Intel® Server system SR1630GP/HGP

Intel® Server system SR1695GPRX

Intel® Server system SR1630GPRX/HGPRX

GP_0125 (LC/LX SKUs)

GPRX_0125 (RX SKUs)

Bromolow

Intel® Server board S1200BTL

Intel® Server system R1304BTLSHBN/R1304BTLSFAN/

P4304BTLSHCN/P4304BTLSFCN

BMC 1.14.3503

Thurley

Intel® Server board S5520UR/URT

Intel® Server System SR1600UR/URHS

Intel® Server System SR1625UR/URSAS

Intel® Server System SR2600URBRP/URLX/URSATA

Intel® Server System SR2625URBRP/URLX/URLXT

BMC00.60

Intel® Server board S5500WB

Intel® Server System SR1690WB

Intel® Server System SR1695WB

BMC00.60

Intel® Server board S5500BC

Intel® Server System SR1630BC

Intel® Server System SC5650BCDP

BMC00.60

Intel® Server board S5520HC/HCT

Intel® Server board S5500HCV

Intel® Server System SC5650HCBRP

BMC00.60

Intel® Workstation board S5520SC

Intel® Workstation system SC5650SCWS

BMC00.60

Recommendations: 

Intel highly recommends affected customers to update the BMC firmware to the latest version to mitigate this potential vulnerability. The latest BMC firmware version for your specific product is mentioned in the above list and is available at downloadcenter.intel.com.

Acknowledgements: 

Intel would like to thank Nadia Heninger from UCSD, and Zakir Durumeric, Eric Wustrow, and J. Alex Halderman from the University of Michigan for reporting this issue and working with us.

Revision history:

Revision

Date

Description

1.0

03-July-2012

Initial publication

Legal Notices and Disclaimers

Intel provides these materials as-is, with no express or implied warranties.

All products, dates, and figures specified are preliminary based on current expectations, and are subject to change without notice.

Intel, processors, chipsets, and desktop boards may contain design defects or errors known as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request.

Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No computer system can be absolutely secure. Check with your system manufacturer or retailer or learn more at https://intel.com.

Some results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your system hardware, software or configuration may affect your actual performance.

Intel and the Intel logo are trademarks of Intel Corporation in the United States and other countries.

*Other names and brands may be claimed as the property of others.
Copyright © Intel Corporation 2018

Report a Vulnerability

If you have information about a security issue or vulnerability with an Intel branded product or technology, please send an e-mail to secure@intel.com. Encrypt sensitive information using our PGP public key.

Please provide as much information as possible, including:

  • The products and versions affected
  • Detailed description of the vulnerability
  • Information on known exploits

A member of the Intel Product Security Team will review your e-mail and contact you to collaborate on resolving the issue. For more information on how Intel works to resolve security issues, see:

For issues related to Intel's external web presence (Intel.com and related subdomains), please contact Intel's External Security Research team.

For issues related to Intel managed open source projects, please visit http://www.01.org/security

Need product support?

The secure@intel.com e-mail address should only be used for reporting security issues.

If you...

  • Have questions about the security features of an Intel product
  • Require technical support
  • Want product updates or patches


Please visit Support & Downloads.