Apache Tomcat - Remote Code Execution

When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled e.g. via setting the readonly initialisation parameter of the Default servlet to false it was possible to upload a JSP file to the server via a specially crafted...