Title

The Ubuntu operating system must only allow the use of DoD PKI-established certificate authorities for verification of the establishment of protected sessions. (Cat II impact)

Discussion

Untrusted Certificate Authorities (CA) can issue certificates, but they may be issued by organizations or individuals that seek to compromise DoD systems or by organizations with insufficient security controls. If the CA used for verifying the certificate is not a DoD-approved CA, trust of this CA has not been established. The DoD will only accept PKI-certificates obtained from a DoD-approved internal or external certificate authority. Reliance on CAs for the establishment of secure sessions includes, for example, the use of SSL/TLS certificates.

Check Content

Verify the directory containing the root certificates for the Ubuntu operating system only contains certificate files for DoD PKI-established certificate authorities by iterating over all files in the '/etc/ssl/certs' directory and checking if, at least one, has the subject matching "DOD ROOT CA". If none is found, this is a finding.

Fix Text

Add at least one DOD certificate authority to the '/usr/local/share/ca-certificates' directory, then run the 'update-ca-certificates' command.

Additional Identifiers

Rule ID: SV-219321r853389_rule

Vulnerability ID: V-219321

Group Title: SRG-OS-000403-GPOS-00182

Expert Comments

CCIs tied to check.

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