Cryptographic Issues

Affecting openssl package, versions *

Overview

OpenSSL 0.9.8i on the Gaisler Research LEON3 SoC on the Xilinx Virtex-II Pro FPGA uses a Fixed Width Exponentiation (FWE) algorithm for certain signature calculations, and does not verify the signature before providing it to a caller, which makes it easier for physically proximate attackers to determine the private key via a modified supply voltage for the microprocessor, related to a "fault-based attack."

References

• Debian Security Tracker
• X-force Vulnerability Report
• http://rdist.root.org/2010/03/08/attacking-rsa-exponentiation-with-fault-injection/
• http://www.eecs.umich.edu/%7Evaleria/research/publications/DATE10RSA.pdf
• http://www.networkworld.com/news/2010/030410-rsa-security-attack.html
• http://www.osvdb.org/62808
• http://www.theregister.co.uk/2010/03/04/severe_openssl_vulnerability/
• http://xforce.iss.net/xforce/xfdb/56750