The Oracle Linux operating system must be configured so that all Group Identifiers (GIDs) referenced in the /etc/passwd file are defined in the /etc/group file.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-221722	OL07-00-020300	SV-221722r958482_rule		Low

Description

If a user is assigned the GID of a group not existing 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
Oracle Linux 7 Security Technical Implementation Guide	2024-08-26

Details

Check Text (C-23437r419238_chk)

Verify all GIDs referenced in the "/etc/passwd" file are defined in the "/etc/group" file.

Check that all referenced GIDs exist with the following command:

# pwck -r

If GIDs referenced in then "/etc/passwd" file are returned as not defined in the "/etc/group" file, this is a finding.

Fix Text (F-23426r419239_fix)

Configure the system to define all GIDs found in the "/etc/passwd" file by modifying the "/etc/group" file to add any non-existent group referenced in the "/etc/passwd" file, or change the GIDs referenced in the "/etc/passwd" file to a group that exists in "/etc/group".