The /etc/group file must not have an extended ACL.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22338	GEN001394	SV-37357r1_rule	ECLP-1	Medium

Description
The /etc/group file is critical to system security and must be protected from unauthorized modification. The group file contains a list of system groups and associated information.

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

Details

Check Text ( C-36047r1_chk )
Verify /etc/group has no extended ACL. # ls -l /etc/group If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.

Fix Text (F-31291r1_fix)
Remove the extended ACL from the file. # setfacl --remove-all /etc/group