V-254801

Discussion

PodSecurity admission controller is a component that validates and enforces security policies for pods running within a Kubernetes cluster. It is responsible for evaluating the security context and configuration of pods against defined policies. To enable PodSecurity admission controller on Static Pods (kube-apiserver, kube-controller-manager, or kube-schedule), the argument "--feature-gates=PodSecurity=true" must be set. To enable PodSecurity admission controller on Kubelets, the featureGates PodSecurity=true argument must be set. (Note: The PodSecurity feature gate is GA as of v1.25.)

Check Content

On the Control Plane, change to the manifests' directory at /etc/kubernetes/manifests and run the command:
grep -i feature-gates *

For each manifest file, if the "--feature-gates" setting does not exist, does not contain the "--PodSecurity" flag, or sets the flag to "false", this is a finding.

On each Control Plane and Worker Node, run the command:
ps -ef | grep kubelet

If the "--feature-gates" option exists, this is a finding. 

Note the path to the config file (identified by --config).

Inspect the content of the config file:
If the "featureGates" setting is not present, does not contain the "PodSecurity" flag, or sets the flag to "false", this is a finding.