C-0070 - Enforce Kubelet client TLS authentication
Prerequisites
Run Kubescape with host sensor (see here)
Framework
AllControls, ArmoBest, security, MITRE, NSA
Severity
Critical
Description of the the issue
Kubelets are the node level orchestrator in Kubernetes control plane. They are publishing service port 10250 where they accept commands from API server. Operator must make sure that only API server is allowed to submit commands to Kubelet. This is done through client certificate verification, must configure Kubelet with client CA file to use for this purpose.
Related resources
What does this control test
Reading the kubelet command lines and configuration file looking for client TLS configuration.
Remediation
Start the kubelet with the --client-ca-file flag, providing a CA bundle to verify client certificates with.
Example
No example
Updated about 2 months ago