NGINX must only allow using DoW-approved certificate authorities for PKI.

Untrusted Certificate Authorities (CA) can issue certificates, but they may be issued by organizations or individuals that seek to compromise DoW systems or by organizations with insufficient security controls. If the CA used for verifying the certificate is not a DoW-approved CA, trust of this CA has not been established.

The DoW will only accept PKI certificates obtained from a DoW-approved internal or external certificate authority. Reliance on CAs for the establishment of secure sessions includes, for example, using TLS certificates.

This requirement focuses on communications protection for the application session rather than for the network packet.

This requirement applies to applications that use communications sessions. This includes, but is not limited to, web-based applications and service-oriented architectures (SOAs).

Satisfies: SRG-APP-000427, SRG-APP-000177, SRG-APP-000910

Determine the path to NGINX config file(s):

# nginx -qT | grep "# configuration"
# configuration file /etc/nginx/nginx.conf:

Note: The default NGINX configuration is "/etc/nginx/nginx.conf", though various files may also be included.

Find any "ssl_certificate" ssl_client_certificate" directives and verify they are DoW approved.

If the certificates are not DoW approved, this is a finding.

Replace any non-DoW issued certificates with DoW-issued certificates.

After replacing the certificates, reload NGINX:

# nginx -s reload