The organization must document the Voice Video registration policies to enforce by session managers for approved Voice Video endpoints.

From Voice Video Policy Security Technical Implementation Guide

Part of SRG-POL-300042

Associated with: CCI-002163

VVSP-01-000008_rule The organization must document the Voice Video registration policies to enforce by session managers for approved Voice Video endpoints.

Vulnerability discussion

Authentication must not automatically give an entity access to an asset. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Registration authenticates and authorizes Voice Video endpoints with the registration server, which is usually a function of the session manager.For most Voice Video systems (VoIP), registration is the process of centrally recording the user ID, endpoint MAC address, and service/policy profile with two-stage authentication prior to authorizing the establishment of the session and user service. The event of successful registration creates the session record immediately. Video conferencing systems register using a similar process with a gatekeeper. Without a system enforcing registration, an adversary could impersonate a legitimate device on the Voice Video network.Auto-registration is an automatic means of detecting and registering a Voice Video endpoint on the network with a session manager and then downloading its configuration to the instrument. Auto-registration allows unauthorized instruments to be added or moved without authorization, possibly allowing theft of services or other malicious attack. Configuring the boundary protection to deny registration (port 1719, etc.) is another layer of defense.

Check content

Review the Voice Video registration policies enforced by session managers for approved Voice Video endpoints. These policies must identify and document the session manager registration processes, to include disabling auto-registration, transfer protocols allowed, and re-registration timeouts. Configuration files transferred must be digitally signed for integrity and encrypted for confidentiality. If the organization has not documented the Voice Video registration policies enforced by session managers for approved Voice Video endpoints, this is a finding.

Fix text

Document Voice Video registration policies to enforce for approved Voice Video endpoints. These policies must identify and document the session manager registration processes, to include disabling auto-registration, transfer protocols allowed, and re-registration timeouts. Configuration files transferred must be digitally signed for integrity and encrypted for confidentiality.

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