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The production VLAN assigned from the AAA server contains IP segments not intended for untrusted resources.


Overview

Finding ID Version Rule ID IA Controls Severity
V-18555 NET-NAC-001 SV-20099r1_rule DCSP-1 Medium
Description
When policy assessment and remediation have been implemented and the advanced AAA server dynamic VLAN is mis-configured, logical separation of the production VLAN may not be assured. Non-trusted resources are resources that are not authenticated in a NAC solution implementing only the authentication component of NAC. Non-trusted resources could become resources that have been authenticated but have not had a successful policy assessment when the automated policy assessment component has been implemented.
STIG Date
Network Devices Security Technical Implementation Guide 2013-10-08

Details

Check Text ( C-21582r1_chk )
Review the AAA server configuration. Have the SA display the policy groups. Have the SA display the vlan configuration. VLANs will be defined under Tunnel-Pvt-Group-ID with a tunnel type of VLAN. The dynamic VLAN definitions will have a IP pool assignment. Ensure the Production VLAN does not share the same AAA IP pool . Then verify the subnets used in other pools are not the same as the production.
Fix Text (F-19171r1_fix)
Build different IP pools. Use different IP subnets for each pool.