ENFORCE_ENCODING_IN_GET_WRITER must be set to true.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-223005 | TCAT-AS-001690 | SV-223005r961863_rule | CCI-000366 | medium |
| Description | ||||
| Some clients try to guess the character encoding of text media when the mandated default of ISO-8859-1 should be used. Some browsers will interpret as UTF-7 when the characters are safe for ISO-8859-1. This can create the potential for a XSS attack. To defend against this, enforce_encoding_in_get_writer must be set to true. | ||||
| STIG | Date | |||
| Apache Tomcat Application Server 9 Security Technical Implementation Guide | 2025-02-11 | |||
Details
Check Text (C-223005r961863_chk)
From the Tomcat server as a privileged user, run the following command:
sudo grep -i enforce_encoding /etc/systemd/system/tomcat.service
If there are no results, or if the org.apache.catalina.connector.response.ENFORCE_ENCODING_IN_GET_WRITER is not ="true", this is a finding.
Fix Text (F-24666r426460_fix)
From the Tomcat server as a privileged user:
Edit the /etc/systemd/system/tomcat.service file, and either add or edit the org.apache.catalina.connector.response.ENFORCE_ENCODING_IN_GET_WRITER setting.
Set the org.apache.catalina.connector.response.ENFORCE_ENCODING_IN_GET_WRITER=true
EXAMPLE:
Environment='CATALINA_OPTS -Dorg.apache.catalina.connector.response.ENFORCE_ENCODING_IN_GET_WRITER=true'
Restart the Tomcat server:
sudo systemctl restart tomcat
sudo systemctl daemon-reload