The ability for administrative accounts to unlock screen saver must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-25280	OSX00200 M6	SV-37214r1_rule	ECPA-1 PESL-1	Medium

Description
The default setting creates a possible point of attack, because the more users in the admin group the more dependent on those users to protect their user names and passwords. By changing the rule in “system.login.screensaver” to “authenticatesession-owner”, users of the admin group cannot unlock the screen saver.

STIG	Date
MAC OSX 10.6 Workstation Security Technical Implementation Guide Draft	2013-01-10

Details

Check Text ( C-35905r1_chk )
Open a terminal session and enter the following command. more /etc/authorization Ensure the "system.login.screensaver" key includes the value "authenticate-session-owner". If not, this is a finding.

Fix Text (F-31163r1_fix)
Open a terminal session and edit the following file. /etc/authorization Change "authenticate-session-owner-or-admin " to "authenticate-session-owner" in the "system.login.screensaver" key. Save the file.