Splunk Enterprise must prohibit password reuse for a minimum of five generations for the account of last resort.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
low	V-221635	SRG-APP-000165-AU-002580	SPLK-CL-000390	SV-221635r1015267_rule	2024-08-27	3

Description
Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. To meet password policy requirements, passwords need to be changed at specific policy-based intervals. If the information system or application allows the user to consecutively reuse their password when that password has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements. In most enterprise environments, this requirement is usually mitigated by a properly configured external authentication system, like LDAP. Splunk local authentication takes precedence over other forms of authentication, and cannot be disabled. The mitigation settings in this requirement apply in the event a local account gets created, for example, an emergency account of last resort for recovery.

Description

Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. To meet password policy requirements, passwords need to be changed at specific policy-based intervals. If the information system or application allows the user to consecutively reuse their password when that password has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements. In most enterprise environments, this requirement is usually mitigated by a properly configured external authentication system, like LDAP. Splunk local authentication takes precedence over other forms of authentication, and cannot be disabled. The mitigation settings in this requirement apply in the event a local account gets created, for example, an emergency account of last resort for recovery.

ℹ️ Check
Select Settings >> Access Controls >> Password Policy Management and verify that History is Enabled and Password history count is set to 5 or more. If not set to 5 or more, this is a finding.

✔️ Fix
Select Settings >> Access Controls >> Password Policy Management and set History to Enabled and Password history count to 5 or more.