Role Binding To Default Service Account

  • Query id: 1e749bc9-fde8-471c-af0c-8254efd2dee5
  • Query name: Role Binding To Default Service Account
  • Platform: Kubernetes
  • Severity: Medium
  • Category: Insecure Defaults
  • CWE: 665
  • URL: Github

Description

No role nor cluster role should bind to a default service account
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - yaml file
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: read-pods
  namespace: default
subjects:
- kind: User
  name: jane
  apiGroup: rbac.authorization.k8s.io
- kind: ServiceAccount
  name: default
  namespace: kube-system
roleRef:
  kind: Role
  name: pod-reader
  apiGroup: rbac.authorization.k8s.io

Code samples without security vulnerabilities

Negative test num. 1 - yaml file
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: read-pods
  namespace: default
subjects:
- kind: User
  name: jane
  apiGroup: rbac.authorization.k8s.io
roleRef:
  kind: Role
  name: pod-reader
  apiGroup: rbac.authorization.k8s.io