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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-223005r557518_rule | 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 Sever 9 Security Technical Implementation Guide | 2020-09-23 |
Details
| Check Text ( C-24677r426459_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 |