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Cisco Security Response

Use of Dual_EC_DRBG in Cisco Products

Document ID: 36356

http://tools.cisco.com/security/center/content/CiscoSecurityResponse/cisco-sr-20131016-ec-drbg

Revision 1.0

For Public Release 2013  October  16 16 : 00  UTC (GMT)


Contents

Response
Additional Information
Status of this Notice: Final
Revision History
Cisco Security Procedures

Cisco Response

Cisco is aware of the industry discussion regarding the Dual Elliptic Curve Deterministic Random Bit Generator (Dual_EC_DRBG) and the recent decision of the U.S. National Institute of Standards and Technology (NIST) to reopen the 800-90A Special Publication (SP) to public review.

Cisco applauds the decision for increased public review of cryptographic standards and will monitor for any updates to NIST SP 800-90A.

Cisco has completed an internal investigation and has confirmed that the Dual_EC_DRBG is not in use in any Cisco products.

Additional Information

Cisco licenses third-party components that include the Dual_EC_DRBG; however, this Deterministic Random Bit Generator (DRBG) is not in use in any Cisco products.

Cisco products that use DRBGs for encryption are compliant with either the older ANSI X9.31 standard or the newer NIST SP 800-90A standard. The 800-90A-compliant crypto libraries in Cisco products have four DRBG options available to Cisco developers, but the standard Cisco implementation is Advanced Encryption Standard Counter mode (AES-CTR), not Dual_EC_DRBG. Additionally, there are no configuration modifications that could enable Dual_EC_DRBG.

Cisco provides strong encryption options that comply with international standards and local regulations. We are always watching for stronger encryption options, and if we find such an option, it will be implemented for the benefit of our customers.

Status of this Notice: Final

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.


Revision History

Revision 1.0 2013-October-16 Initial public release.

Cisco Security Procedures

Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on the Cisco worldwide website at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This includes instructions for press inquiries regarding Cisco Security Notices. All Cisco Security Advisories are available at http://www.cisco.com/go/psirt.


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