The prevents would-be attackers from attempting to increase privileges to a web application by packaging an altered/custom context.xml. Set the DeployXML Attribute to False in a Hosted Environment POODLE is a SSL v3 protocol vulnerability discovered in 2014. An attacker can gain access to sensitive information such as passwords and browser cookies by exploiting this vulnerability subsequently, SSL v3 (and SSL in general) should not be included in server.xml file under the sslEnabledProtocols attribute. To prevent this information leakage, disable the xpoweredBy attribute in the server.xml file. This gives attackers a workable starting point to craft an attack. If enabled, Tomcat will send information such as the Servlet and JSP specification versions and the full Tomcat version, among others. Disable Sending of the X-Powered-By HTTP Header This can be mitigated by disabling allowTrace in the server.xml file. Though useful for debugging, enabling allowTrace can expose some browsers to an cross-site scripting XSS attack. If the port must be kept open, be sure to configure a strong password for shutdown. Either disable the shutdown port by setting the port attribute in the server.xml file to -1. This prevents malicious actors from shutting down Tomcat's web services. Put Tomcat's Shutdown Procedure on Lockdown
Tomcat's examples web application is an application that should be removed to prevent exploitation. These applications have been known to harbor vulnerabilities, and should be removed if not in use. Most web server platforms also provide a set of sample or test web application for demo and learning purposes. Remove Any Default Sample or Test Web Applications In Tomcat's case, a user with the minimum necessary OS permissions should be created exclusively to run the Tomcat process. Web-related services should not be run by user accounts with a high level of administrative access. This line of advice applies to most web server platforms. The following are 15 way to secure Apache Tomcat 8, out-of-the-box. Currently at version 8, the popular web server has not been without its security flaws, perhaps most famously publicized in this incident of aircraft hacking by security researcher Chris Roberts earlier this year. However, hardening Tomcat's default configuration is just plain good security sense-even if you don't plan on using it on your plane's network.
Apache Tomcat is the leading Java application server by market share and the world's most widely used web application server overall.
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