Splunk Enterprise idle session timeout must be set to not exceed 15 minutes.

Automatic session termination after a period of inactivity addresses the potential for a malicious actor to exploit the unattended session. Closing any unattended sessions reduces the attack surface to the application.

Satisfies: SRG-APP-000295-AU-000190, SRG-APP-000389-AU-000180

This check is performed on the machine used as a search head, which may be a separate machine in a distributed environment.

If the instance being reviewed is not used as a search head, this check in Not Applicable.

Examine the configuration.

Navigate to the $SPLUNK_HOME/etc/system/local/ directory. View the web.conf file.

If the web.conf file does not exist, this is a finding.

If the "tools.sessions.timeout" is missing or is configured to 16 or more, this is a finding.

This configuration is performed on the machine used as a search head, which may be a separate machine in a distributed environment.

If the web.conf file does not exist, copy the file from $SPLUNK_HOME/etc/system/default to the $SPLUNK_HOME/etc/system/local directory.

Modify/Add the following lines in the web.conf file:

tools.session.timeout = 15