TCAT-AS-000020 - Secured connectors must be configured to use strong encryption ciphers.

Information

The Tomcat <Connector> element controls the TLS protocol and the associated ciphers used. If a strong cipher is not selected, an attacker may be able to circumvent encryption protections that are configured for the connector. Strong ciphers must be employed when configuring a secured connector.

The configuration attribute and its values depend on what HTTPS implementation the user is utilizing. The user may be utilizing either Java-based implementation aka JSSE - with BIO and NIO connectors, or OpenSSL-based implementation - with APR connector.

TLSv1.2 ciphers are configured via the server.xml file on a per connector basis. For a list of approved ciphers, refer to NIST SP 800-52 section 3.3.1.1.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

As a privileged user on the Tomcat server, edit the $CATALINA_BASE/conf/server.xml and modify the <Connector/> element.

Add the SSLEnabledProtocols='TLSv1.2' setting to the connector or modify the existing setting.

Set SSLEnabledProtocols='TLSv1.2'. Save the server.xml file and restart Tomcat:
sudo systemctl restart tomcat
sudo systemctl reload-daemon

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Apache_Tomcat_Application_Server_9_V2R4_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-17(2), CAT|II, CCI|CCI-000068, Rule-ID|SV-222927r615938_rule, STIG-ID|TCAT-AS-000020, STIG-Legacy|SV-111373, STIG-Legacy|V-102429, Vuln-ID|V-222927

Plugin: Unix

Control ID: 4e3ba41e949b177c170fc2463624324073c54703b19d86a895fd9f01f7717906