The IBM z/VM JOURNALING LOGON parameter must be set for lockout after 3 attempts for 15 minutes.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-237900	IBMZ-VM-000040	SV-237900r858930_rule		Medium

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

STIG	Date
IBM zVM Using CA VM:Secure Security Technical Implementation Guide	2022-08-31

Details

Check Text ( C-41110r858928_chk )
Display the System Configuration File. If the "JOURNALING" statement is set to: Facility ON LOGON Lockout after three attempts for 15 minutes, this is not a finding. Note: Site may set Lockout value at 0, this will require system administrator action for reset. Issue "QUERY JOURNAL" command. If the response is as follows this is not a finding: Journal: LOGON-on

Fix Text (F-41069r858929_fix)
Configure the System Configuration "JOURNALING" statement to: Facility ON LOGON Lockout after 3 attempts for 15 minutes or 0 if system administrator action is desired.