description: The Realm implementations in Apache Tomcat versions 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder.
problem types: Timing Attack
affected:
{
product: Apache Tomcat
vendor: Apache Software Foundation
versions:
status: affected, version: 9.0.0.M1 to 9.0.0.M9
status: affected, version: 8.5.0 to 8.5.4
status: affected, version: 8.0.0.RC1 to 8.0.36
status: affected, version: 7.0.0 to 7.0.70
status: affected, version: 6.0.0 to 6.0.45
}