Vulnerability Discussion

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.

Check

Verify all local files and directories on RHEL 8 have a valid group with the following command:

Note: The value after -fstype must be replaced with the filesystem type. XFS is used as an example.

$ sudo find / -fstype xfs -nogroup

If any files on the system do not have an assigned group, this is a finding.

Note: Command may produce error messages from the /proc and /sys directories.

Fix

Either remove all files and directories from RHEL 8 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