All RHEL 9 local files and directories must have a valid group owner.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257930	RHEL-09-232250	SV-257930r925777_rule		Medium

Description
Files without a valid group owner may be unintentionally inherited if a group is assigned the same Group Identifier (GID) as the GID of the files without a valid group owner.

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

Details

Check Text ( C-61671r925775_chk )
Verify all local files and directories on RHEL 9 have a valid group with the following command: $ df --local -P | awk {'if (NR!=1) print $6'} | sudo xargs -I '{}' find '{}' -xdev -nogroup If any files on the system do not have an assigned group, this is a finding.

Fix Text (F-61595r925776_fix)
Either remove all files and directories from RHEL 9 that do not have a valid group, or assign a valid group to all files and directories on the system with the "chgrp" command: $ sudo chgrp