All AIX Group Identifiers (GIDs) referenced in the /etc/passwd file must be defined in the /etc/group file.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-91625	AIX7-00-003033	SV-101723r1_rule		Medium

Description
If a user is assigned the GID of a group not existing on the system, and a group with that GID is subsequently created, the user may have unintended rights to the group.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2020-02-24

Details

Check Text ( C-90779r3_chk )
Verify that there are no GIDs referenced in "/etc/passwd" that are not defined in "/etc/group": # cut -d: -f4 /etc/passwd 0 1 2 3 4 203 204 # cut -d: -f3 /etc/group 0 1 2 3 4 203 204 If there are GID's listed in the "/etc/passwd" file that are not listed in the "/etc/group" file, this is a finding.

Fix Text (F-97823r1_fix)
Add a group to the system for each GID referenced without a corresponding group by running "mkgroup" command.