Red Hat Security Advisory 2017-2247-01 - Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages technologies. The following packages have been upgraded to a later upstream version: tomcat. Security Fix: The Realm implementations 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.
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