Title

The ALG providing intermediary services for remote access communications traffic must use NIST FIPS-validated cryptography to protect the integrity of remote access sessions. (Cat II impact)

Discussion

Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access is access to DoD-nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include broadband and wireless connections. Remote access methods include, for example, proxied remote encrypted traffic (e.g., TLS gateways, web content filters, and webmail proxies). Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. This requirement applies to ALGs providing remote access proxy services as part of its intermediary services (e.g., OWA or TLS gateway).

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 uses cryptography to protect the integrity of remote access sessions. If the ALG does not use cryptography to protect the integrity of remote access sessions, this is a finding.

Fix Text

If intermediary services for remote access communications traffic are provided, configure the ALG to use cryptography to protect the integrity of remote access sessions.

Additional Identifiers

Rule ID: SV-68607r1_rule

Vulnerability ID: V-54361

Group Title: SRG-NET-000063-ALG-000012

Expert Comments

CCIs tied to check.

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