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The Kubernetes etcd must enforce ports, protocols, and services (PPS) that adhere to the Ports, Protocols, and Services Management Category Assurance List (PPSM CAL).


Finding ID Version Rule ID IA Controls Severity
V-242413 CNTR-K8-000950 SV-242413r863989_rule Medium
Kubernetes etcd PPS must be controlled and conform to the PPSM CAL. Those PPS that fall outside the PPSM CAL must be blocked. Instructions on the PPSM can be found in DoD Instruction 8551.01 Policy.
Kubernetes Security Technical Implementation Guide 2022-12-02


Check Text ( C-45688r863833_chk )
Change to the /etc/kubernetes/manifests/ directory on the Kubernetes Control Plane. Run the command:
grep kube-apiserver.manifest -I -etcd-servers *
-edit etcd-main.manifest file:
VIM Review livenessProbe:
Review ports:
- containerPort:
- containerPort:
Run Command:
kubectl describe services –all-namespace
Search labels for any apiserver names spaces.

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 etcd architecture, and determine applicable PPS. Any PPS in the system documentation not in compliance with the CAL PPSM is a finding. Any PPS not set in the system documentation is a finding.

Review findings against the most recent PPSM CAL:

Verify etcd 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.
Fix Text (F-45646r712594_fix)
Amend any system documentation requiring revision. Update Kubernetes etcd manifest and namespace PPS configuration to comply with PPSM CAL.