The Ubuntu operating system must use DoD PKI-established certificate authorities for verification of the establishment of protected sessions.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-238364r880902_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Configure the Ubuntu operating system to use of DoD PKI-established certificate authorities for verification of the establishment of protected sessions.
Edit the "/etc/ca-certificates.conf" file, adding the character "!" to the beginning of all uncommented lines that do not start with the "!" character with the following command:
$ sudo sed -i -E 's/^([^!#]+)/!\1/' /etc/ca-certificates.conf