z/OS UNIX each group is not defined with a unique GID.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-6986	ZUSS0042	SV-7289r2_rule	DCCS-1 DCCS-2	Medium

Description
User identifiers (ACF2 logonids, RACF userids, and Top Secret ACIDs), groups, and started tasks that use z/OS UNIX facilities are defined to an ACP with attributes including UID and GID. If these attributes are not correctly defined, data access or command privilege controls could be compromised.

STIG	Date
z/OS RACF STIG	2019-12-12

Details

Check Text ( C-4644r1_chk )
Refer to the following report produced by the ACP Data Collection: ACF2 - ACF2CMDS.RPT(OMVSGRP) RACF - RACFCMDS.RPT(LISTGRP) Automated Analysis Refer to the following report produced by the z/OS Data Collection: - PDI(ZUSS0042) For ACF2 and RACF ensure that each GID is unique to a specific group. For TSS this is Not Applicable.

Fix Text (F-18961r1_fix)
The systems programmer will verify that each group has a unique GID number,