The EDB Postgres Advanced Server must only accept end entity certificates issued by DoW PKI or DoW-approved PKI Certification Authorities (CAs) for the establishment of all encrypted sessions.

Only DoW-approved external PKIs have been evaluated to ensure that they have security controls and identity vetting procedures in place which are sufficient for DoW systems to rely on the identity asserted in the certificate. PKIs lacking sufficient security controls and identity vetting procedures risk being compromised and issuing certificates that enable adversaries to impersonate legitimate users.

The authoritative list of DoW-approved PKIs is published at https://cyber.mil/pki-pke/interoperability.

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

Verify the "root.crt" certificate was issued by a valid DoW entity.

> openssl x509 -in /<PGDATA directory>/root.crt -text | grep -i "issuer". The default path for the PostgreSQL data directory (PGDATA) is /var/lib/edb/as<version>/data, but this will vary according to local circumstances.

Example: > openssl x509 -in /var/lib/edb/as15/data/root.crt -text | grep -i "issuer"

If any issuers are listed that are not approved DoW certificate authorities, this is a finding.

Revoke trust in any certificates not issued by a DoW-approved certificate authority.

Contact the organization's certificate issuer and request a new certificate that is issued by a DoW-approved certificate authority.