IBM WebSphere Application Server (WAS) 6.1.0.9, when the JAAS Login functionality is enabled, allows attackers to perform an internal application hashtable login by (1) not providing a password or (2) providing an empty password.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.