The organization must perform and document scans at the bidirectional enclave boundary protection used between the local Voice Video system management network and the DISN Voice Services management network.

From Voice Video Policy Security Technical Implementation Guide

Part of SRG-POL-400019

Associated with: CCI-002073

VVSP-01-000048_rule The organization must perform and document scans at the bidirectional enclave boundary protection used between the local Voice Video system management network and the DISN Voice Services management network.

Vulnerability discussion

Organizations carefully consider the risks that may be introduced when information systems (i.e., system interconnections) are connected to other systems with different security requirements and security controls, both within organizations and external to organizations. Authorizing Officials determine the risk associated with information system connections and the appropriate controls employed. Risk considerations also include information systems sharing the same networks.Voice Video system devices and circuit-switched telecom switches may be connected to multiple management networks. Several management networks may have connectivity through the local management VLAN or dedicated OOB management network. Managing or monitoring the Voice Video system devices under local management may require segmentation from other management networks. When networks are interconnected and both management networks have access to the same devices via a single management port, each of these management networks is a different enclave. The access and traffic between them must be filtered to protect each from compromise by another.

Check content

Review each Voice Video system security plan (SSP). Confirm the organization performs and documents network vulnerability scans at the bidirectional enclave boundary protection used between the local Voice Video system management network and the DISN Voice Services management network. Verify the effectiveness of the boundary protection ACLs by performing network vulnerability scans as follows: - Scan the entire DISN management network (e.g., RTS EMS, ADIMSS, ARDIMSS, or DCN) address space from an unused randomly selected IP address on the local management network. - Scan the entire local management network address space from an unused randomly selected IP address on the DISN management network. If the organization does not perform and document scans at the bidirectional enclave boundary protection used between the local Voice Video system management network and the DISN Voice Services management network, this is a finding. If the network vulnerability scan receives a response from any host on either network, this is a finding.

Fix text

Perform and document network vulnerability scans at the bidirectional enclave boundary protection used between the local Voice Video system management network and the DISN Voice Services management network. Validate the effectiveness of the boundary protection on an annual basis. If the scans reveal an issue, document the required changes to the Access Control Lists (ACLs) and implement them in coordination between enclave owners.

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