EMC NetWorker contains a denial of service vulnerability that is caused by incorrect handling of malformed messages. A malicious user can construct and use malformed messages as a part of RPC authentication attempt, which can result in denial of service from critical NetWorker processes. Versions affected include 8.0.4.5 or later, 8.1.3.6 or later, 8.2.2.2 or later, and 9.0 Build 407 or higher.