ENFORCE_ENCODING_IN_GET_WRITER must be set to true.

An XCCDF Rule

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.

ID: SV-223005r961863_rule
Version: TCAT-AS-001690
Severity: Medium
References: CCI-000366
Updated: 15 days ago

Remediation Templates

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

ENFORCE_ENCODING_IN_GET_WRITER must be set to true.

Description

Remediation Templates

A Manual Procedure