TLS 1.2 must be used on secured HTTP connectors.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-222929	TCAT-AS-000040	SV-222929r557518_rule		Medium

Description
Using older versions of TLS introduces security vulnerabilities that exist in the older versions of the protocol. Tomcat by default will use all available versions of the SSL/TLS protocols unless the version is explicitly defined in the SSL configuration attribute for the associated connector. This introduces the opportunity for the client to negotiate the use of an older protocol version and increases the risk of compromise of the Tomcat server. All connectors must use TLS 1.2. While this check specifically verifies the use of TLSv1.2, it does not provide all of the steps required to successfully configure a secured TLS connection. That task involves multiple additional steps that are not included here. Refer to Tomcat documentation for all of the steps needed to create a TLS protected connector. Satisfies: SRG-APP-000015-AS-000010, SRG-APP-000172-AS-000120, SRG-APP-000439-AS-000155

Description

Using older versions of TLS introduces security vulnerabilities that exist in the older versions of the protocol. Tomcat by default will use all available versions of the SSL/TLS protocols unless the version is explicitly defined in the SSL configuration attribute for the associated connector. This introduces the opportunity for the client to negotiate the use of an older protocol version and increases the risk of compromise of the Tomcat server. All connectors must use TLS 1.2. While this check specifically verifies the use of TLSv1.2, it does not provide all of the steps required to successfully configure a secured TLS connection. That task involves multiple additional steps that are not included here. Refer to Tomcat documentation for all of the steps needed to create a TLS protected connector. Satisfies: SRG-APP-000015-AS-000010, SRG-APP-000172-AS-000120, SRG-APP-000439-AS-000155

STIG	Date
Apache Tomcat Application Sever 9 Security Technical Implementation Guide	2020-09-23

Details

Check Text ( C-24601r426231_chk )
From the Tomcat server console, run the following command: sudo cat $CATALINA_BASE/conf/server.xml. Examine each element. For every HTTP protocol connector: Verify the SSLEnabledProtocols="TLSv1.2" flag is set on each connector. If the SSLEnabledProtocols setting is not set to TLSv1.2 or greater, this is a finding.

Fix Text (F-24590r426232_fix)
As a privileged user on the Tomcat server, edit the $CATALINA_BASE/conf/server.xml and modify the element. Add the "SSLEnabledProtocols=" flag to the connector or modify the existing flag. Set SSLEnabledProtocols="TLSv1.2". Save the server.xml file and restart Tomcat: sudo systemctl restart tomcat sudo systemctl reload-daemon