CA-TSS ACID creation must use the EXP option.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223958	TSS0-ES-000850	SV-223958r998498_rule		Medium

Description
Without providing this capability, an account may be created without a password. Nonrepudiation cannot be guaranteed once an account is created if a user is not forced to change the temporary password upon initial logon. Temporary passwords are typically used to allow access when new accounts are created or passwords are changed. It is common practice for administrators to create temporary passwords for user accounts which allow the users to log on, yet force them to change the password once they have successfully authenticated.

Description

Without providing this capability, an account may be created without a password. Nonrepudiation cannot be guaranteed once an account is created if a user is not forced to change the temporary password upon initial logon. Temporary passwords are typically used to allow access when new accounts are created or passwords are changed. It is common practice for administrators to create temporary passwords for user accounts which allow the users to log on, yet force them to change the password once they have successfully authenticated.

STIG	Date
IBM z/OS TSS Security Technical Implementation Guide	2024-06-24

Details

Check Text ( C-25631r998401_chk )
Ask the system administrator (SA) for the procedures for creating new ACIDs. If the procedure contains the "EXP" option, this is not a finding.

Fix Text (F-25619r998402_fix)
Ensure procedures to create New Acids include the "EXP" option. Example: TSS CREATE(USER02) NAME('ANDY POE') TYPE(USER) DEPARTMENT(PAYDEPT) PASSWORD(INITIAL,60,EXP) FACILITY(TSO)