Splunk Enterprise must automatically lock the account until the locked account is released by an administrator when three unsuccessful login attempts in 15 minutes are exceeded.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-251660	SPLK-CL-000070	SV-251660r879722_rule		Medium

Description
By limiting the number of failed login attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute forcing, is reduced. Limits are imposed by locking the account.

STIG	Date
Splunk Enterprise 8.x for Linux Security Technical Implementation Guide	2023-09-18

Details

Check Text ( C-55098r819083_chk )
Examine the configuration. Navigate to the $SPLUNK_HOME/etc/system/local/ directory. View the authentication.conf file. If the authentication.conf file does not exist, this is a finding. If the lockoutUsers" is missing or is configured to 0 or False, this is a finding.

Fix Text (F-55052r819084_fix)
If the authentication.conf file does not exist, copy the file from $SPLUNK_HOME/etc/system/default to the $SPLUNK_HOME/etc/system/local directory. Modify the following lines in the authentication.conf file under the [splunk_auth]: lockoutUsers = True or 1