Secured connectors must be configured to use strong encryption ciphers.
An XCCDF Rule
Description
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.
- ID
- SV-222927r960759_rule
- Version
- TCAT-AS-000020
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
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