Title

The ALG providing intermediary services for remote access communications traffic must provide the capability to immediately disconnect or disable remote access to the information system. (Cat II impact)

Discussion

Without the ability to immediately disconnect or disable remote access, an attack or other compromise taking progress would not be immediately stopped. Remote access functionality must have the capability to immediately disconnect current users remotely accessing the information system and/or disable further remote access. The remote access functionality may implement features, such as automatic disconnect (or user-initiated disconnect) in case of adverse information based on an indicator of compromise or attack. This requirement applies to ALGs providing remote access termination (e.g., OWA or TLS gateway) as part of its intermediary services.

Check Content

If the ALG does not serve as an intermediary for remote access traffic (e.g., web content filter, TLS and webmail), this is not applicable. Verify the ALG provides the capability to immediately disconnect or disable remote access to the information system. If the ALG does not provide the capability to immediately disconnect or disable remote access to the information system, this is a finding.

Fix Text

If intermediary services for remote access communications traffic are provided, configure the ALG to provide the capability to immediately disconnect or disable remote access to the information system.

Additional Identifiers

Rule ID: SV-204979r831356_rule

Vulnerability ID: V-204979

Group Title: SRG-NET-000314

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.