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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22334	GEN001390 M6	SV-38089r1_rule	ECLP-1	Medium

Description
File system ACLs can provide access to files beyond what is allowed by the mode numbers of the files. The /etc/passwd file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification.

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

Details

Check Text ( C-37626r1_chk )
Open a terminal session and enter the following command to view the /etc/passwd file extended ACLs. ls -lL /etc/passwd If the permissions include a '+', the file has an extended ACL, this is a finding.

Fix Text (F-32868r1_fix)
Open a terminal session and enter the following command to remove the extended ACLs. chmod -N /etc/passwd