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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.
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