All shell files must be group-owned by root, bin, sys, or system.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22365	GEN002210	SV-37399r1_rule	ECLP-1	Medium

Description
If shell files are group-owned by users other than root or a system group, they could be modified by intruders or malicious users to perform unauthorized actions.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2017-03-01

Details

Check Text ( C-36082r1_chk )
If /etc/shells exists, check the group ownership of each shell referenced. Procedure: # cat /etc/shells | xargs -n1 ls -l Otherwise, check any shells found on the system. Procedure: # find / -name "*sh" | xargs -n1 ls -l If a shell is not group-owned by root, bin, sys, or system, this is a finding.

Fix Text (F-31329r1_fix)
Change the group-owner of the shell to root, bin, sys, or system. Procedure: # chgrp root