Confirm that access control systems have a default "deny-all" setting |
A default "deny-all" setting ensures no one is granted access until and unless a rule is established specifically granting such access. Some access control systems are set by default to "allow-all," thereby permitting access unless/until a rule is written to specifically deny it, and this violates this PCI requirement.
This Action1 query confirms that all access control systems used on the endpoints are effectively configured to deny all access unless it is granted specifically or otherwise flags systems that not configured properly to detect any violations of this section of PCI DSS.
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Related Alerts and Reports:
7.2.1: Access Control Systems are In Place
Verify that access control systems exist on all endpoints in the CDE
7.2.2: Access Control Systems are Configured
Confirm that access control systems are configured to enforce privileges
Find more information on 7.2.3: Default Deny-All Setting at Microsoft TechNet.