IBM WebSphere DataPower SOA appliances through 4.0.2.15, 5.x through 5.0.0.17, 6.0.0.x through 6.0.0.9, and 6.0.1.x through 6.0.1.5 make it easier for remote attackers to obtain a PreMasterSecret value and defeat cryptographic protection mechanisms by sending a large number of requests in an SSL/TLS side-channel timing attack.