All RHEL 9 interactive users must have a primary group that exists.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258048	RHEL-09-411045	SV-258048r926131_rule		Medium

Description
If a user is assigned the Group Identifier (GID) of a group that does not exist on the system, and a group with the GID is subsequently created, the user may have unintended rights to any files associated with the group.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2023-12-01

Details

Check Text ( C-61789r926129_chk )
Verify that all RHEL 9 interactive users have a valid GID. Check that the interactive users have a valid GID with the following command: $ sudo pwck -qr If the system has any interactive users with duplicate GIDs, this is a finding.

Fix Text (F-61713r926130_fix)
Configure the system so that all GIDs are referenced in "/etc/passwd" are defined in "/etc/group". Edit the file "/etc/passwd" and ensure that every user's GID is a valid GID.