NSA, MITRE, ArmoBest
Attackers who have permissions, can run malicious commands in containers in the cluster using exec command (“kubectl exec”). In this method, attackers can use legitimate images, such as an OS image (e.g., Ubuntu) as a backdoor container, and run their malicious code remotely by using “kubectl exec”.
ClusterRole, ClusterRoleBinding, Role, RoleBinding
Check which subjects have RBAC permissions to exec into pods– if they have the “pods/exec” verb.
It is recommended to prohibit “kubectl exec” command in production environments. It is also recommended not to use subjects with this permission for daily cluster operations.
kind: Role apiVersion: rbac.authorization.k8s.io/v1 metadata: namespace: default name: pod-exec rules: - apiGroups: [""] resources: ["pods/exec"] # we look for this resource or * verbs: ["create"] # we look for this verb or *
Updated about 20 hours ago