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ACF2 PSWD GSO record value must be set to prohibit password reuse for a minimum of five generations or more.


Overview

Finding ID Version Rule ID IA Controls Severity
V-223508 ACF2-ES-000910 SV-223508r695441_rule Medium
Description
Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. 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.
STIG Date
IBM z/OS ACF2 Security Technical Implementation Guide 2022-06-22

Details

Check Text ( C-25181r695440_chk )
From an ACF command screen enter:
SET CONTROL(GSO)
LIST PSWD

If "PSWDXHIST" is not specified, this is a finding.

If "PSWDXHIST#" is set to "5" or greater, this is not a finding
Fix Text (F-25169r500658_fix)
Configure Password option "PSWXHST" is coded and "PSWXHST#" is "5" or greater.