Red Hat Security Advisory 2016-0492-01 – Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages technologies. It was found that the expression language resolver evaluated expressions within a privileged code section. A malicious web application could use this flaw to bypass security manager protections. Previously, using a New I/O connector in the Apache Tomcat 6 servlet resulted in a large memory leak. An upstream patch has been applied to fix this bug, and the memory leak no longer occurs.