The management interface must be configured as passive for the IGP instance deployed in the managed network.

From Perimeter Router Security Technical Implementation Guide

Part of The management interface is not IGP passive.

SV-19077r3_rule The management interface must be configured as passive for the IGP instance deployed in the managed network.

Vulnerability discussion

The OOBM access switch will connect to the management interface of the managed network devices. The management interface can be a true OOBM interface or a standard interface functioning as the management interface. In either case, the management interface of the managed network devices will be directly connected to the OOBM network.An OOBM interface does not forward transit traffic; thereby, providing complete separation of production and management traffic. Since all management traffic is immediately forwarded into the management network, it is not exposed to possible tampering. The separation also ensures that congestion or failures in the managed network do not affect the management of the device. If the device does not have an OOBM port, the interface functioning as the management interface must be configured so that management traffic, both data plane and control plane, does not leak into the managed network and that production traffic does not leak into the management network.

Check content

Review the configuration to verify the management interface is configured as passive for the IGP instance for the managed network. Depending on the platform and routing protocol, this may simply require that the interface or its IP address is not included in the IGP configuration. If the management interface is not configured to be passive for IGP instances, this is a finding.

Fix text

Configure the management interface as passive for the IGP instance configured for the managed network. Depending on the platform and routing protocol, this may simply require that the interface or its IP address is not included in the IGP configuration.

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