ErrorReportValve showServerInfo must be set to false.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-222975 | TCAT-AS-000920 | SV-222975r961167_rule | Medium |
| Description |
| The Error Report Valve is a simple error handler for HTTP status codes that will generate and return HTML error pages. It can also be configured to return pre-defined static HTML pages for specific status codes and/or exception types. Disabling showServerInfo will only return the HTTP status code and remove all CSS from the default non-error related HTTP responses. |
| STIG | Date |
| Apache Tomcat Application Server 9 Security Technical Implementation Guide | 2025-02-11 |
Details
| Check Text (C-24647r426369_chk) |
| As an elevated user on the Tomcat server run the following command: sudo grep -i ErrorReportValve $CATALINA_BASE/conf/server.xml file. If the ErrorReportValve element is not defined and showServerInfo set to "false", this is a finding. EXAMPLE: <Host ...> ... <Valve className="org.apache.catalina.valves.ErrorReportValve" showServerInfo="false"/> ... </Host> |
| Fix Text (F-24636r426370_fix) |
| As a privileged user on the Tomcat server: Edit the $CATALINA_BASE/conf/server.xml file. Create or modify an ErrorReportValve <Valve> element nested beneath each <Host> element. EXAMPLE: <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="false"> ... <Valve className="org.apache.catalina.valves.ErrorReportValve" showServerInfo="false" /> ... </Host> Restart the Tomcat server: sudo systemctl restart tomcat sudo systemctl daemon-reload |