The Cisco ISE must be configured to dynamically apply restricted access of endpoints that are granted access using MAC Authentication Bypass (MAB). This is required for compliance with C2C Step 4.
An XCCDF Rule
Description
<VulnDiscussion>MAB can be defeated by spoofing the MAC address of a valid device. MAB enables port-based access control using the MAC address of the endpoint. A MAB-enabled port can be dynamically enabled or disabled based on the MAC address of the device that connects to it. NPE devices that can support PKI or an allowed authentication type must use PKI. MAB may be used for NPE that cannot support an approved device authentication. Non-entity endpoints include IoT devices, VOIP phone, and printer.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-242602r855859_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Configure the authorization policies for devices granted access via MAB to have restricted access.
1. Navigate to Work Centers >> Network Access >> Policy Sets.
2. Choose ">" on the applicable policy set.
3. Expand the "Authorization Policy".
4. Add a restricted VLAN, Access Control List, Scalable Group Tag, or any combination of these that are used to restrict access under results.