All shell files must not have extended ACLs.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22366	GEN002230 M6	SV-38098r1_rule	ECLP-1	Medium

Description
Shells with world/group-write permissions give the ability to maliciously modify the shell to obtain unauthorized access.

STIG	Date
MAC OSX 10.6 Workstation Security Technical Implementation Guide	2013-04-09

Details

Check Text ( C-37636r1_chk )
Open a terminal session and enter the following command to view extended ACLs. cat /etc/shells | xargs -n1 ls -lL 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-32877r1_fix)
Open a terminal session and use the following command to remove the extended ACLs. chmod -N