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

From MAC OSX 10.6 Workstation Security Technical Implementation Guide

Part of OSX00200-Admin unlock Screen Saver

Associated with IA controls: ECPA-1, PESL-1

SV-37214r1_rule The ability for administrative accounts to unlock screen saver must be disabled.

Vulnerability discussion

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.

Check content

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

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.

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