V-242411

Discussion

Kubernetes Scheduler PPS must be controlled and conform to the PPSM CAL. Those ports, protocols, and services that fall outside the PPSM CAL must be blocked. Instructions on the PPSM can be found in DoD Instruction 8551.01 Policy.

Check Content

Change to the /etc/kubernetes/manifests/ directory on the Kubernetes Control Plane. Run the command:
grep kube-scheduler.manifest -I -insecure-port
                grep kube-scheduler.manifest -I -secure-port
-edit manifest file:
VIM <Manifest Name>
Review  livenessProbe:
HttpGet:
Port:
Review ports:
- containerPort:
       hostPort:
- containerPort:
       hostPort:

Run Command: 
kubectl describe services --all-namespaces 
Search labels for any scheduler namespaces.
Port:

Any manifest and namespace PPS configuration not in compliance with PPSM CAL is a finding.

Review the information systems documentation and interview the team, gain an understanding of the Scheduler architecture, and determine applicable PPS. Any PPS in the system documentation not in compliance with the CAL PPSM is a finding. Any PPSs not set in the system documentation is a finding.

Review findings against the most recent PPSM CAL:
https://cyber.mil/ppsm/cal/

Verify Scheduler network boundary with the PPS associated with the CAL Assurance Categories. Any PPS not in compliance with the CAL Assurance Category requirements is a finding.