BSA-2017-474

Brocade Security Advisory ID

BSA-2017-474

Initial Publication Date

11/17/2017

Last Updated

12/23/2018

Revision

2.0: Final

Risk Impact

Medium

Workaround

N/A

Component

Infineon RSA Library

Affected CVE

CVE-2017-15361

CVSS Score

5.9

Summary

The Infineon RSA library version 1.02.013 in Infineon Trusted Platform Module (TPM) firmware mishandles RSA key generation, which makes it easier for attackers to defeat various cryptographic protection mechanisms via targeted attacks, aka ROCA. The keyspace required for a brute force search is lessened such that it is feasible to factorize keys under at least 2048 bits and obtain the RSA private key. The attacker needs only access to the victim's RSA public key generated by this library in order to calculate the private key.

Note that only RSA key generation is impacted. ECC is unaffected. RSA keys generated by other devices/libraries may also be used safely with this library.

Affected Products
No Brocade Fibre Channel technology products from Broadcom are currently known to be affected by this vulnerability.

Workaround

There are no workarounds that address this vulnerability.

Revision History

Version Change Date
1.0 Initial Publication November 17, 2017
2.0 Updated to Fibre Channel only December 23, 2018

Disclaimer

THIS DOCUMENT IS PROVIDED ON AN AS-IS BASIS SOLELY FOR INFORMATIONAL PURPOSES AND DOES NOT IMPLY ANY KIND OF GUARANTY OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. YOUR USE OF THE INFORMATION CONTAINED HEREIN IS AT YOUR OWN RISK. ALL INFORMATION PROVIDED HEREIN IS BASED ON BROCADE'S CURRENT KNOWLEDGE AND UNDERSTANDING OF THE VULNERABILITY AND IMPACT TO BROCADE HARDWARE AND SOFTWARE PRODUCTS. BROCADE RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.