Guides

Ensure that the --peer-client-cert-auth argument is set to true (etcd)

etcd should be configured for peer authentication. etcd is a highly-available key value store used by Kubernetes deployments for persistent storage of all of its REST API objects. These objects are sensitive in nature and should be accessible only by authenticated etcd peers in the etcd cluster.

Suggest Edits

Risk Level: High
Cloud Entity: Pods
CloudGuard Rule ID: D9.K8S.IAM.16
Covered by Spectral: Yes
Category: Compute

GSL LOGIC

KubernetesPod where labels contain [value='etcd'] and namespace = 'kube-system' should have spec.containers with [parsedArgs contain [key like 'peer-client-cert-auth' and value = 'true']]

REMEDIATION

Edit the etcd pod specification file $etcdconf on the master
node and set the below parameter.
--peer-client-cert-auth=true

References

  1. https://coreos.com/etcd/docs/latest/op-guide/security.html
  2. https://kubernetes.io/docs/admin/etcd/
  3. https://coreos.com/etcd/docs/latest/op-guide/configuration.html#peer-client-cert-auth

Pods

Pods are the smallest deployable units of computing that can be created and managed in Kubernetes.A Pod is a group of one or more containers (such as Docker containers), with shared storage/network, and a specification for how to run the containers.

Compliance Frameworks

  • CIS Kubernetes Benchmark v1.20
  • CIS Kubernetes Benchmark v1.23
  • CIS Kubernetes Benchmark v1.24
  • CIS Kubernetes Benchmark v1.4.0
  • CIS Kubernetes Benchmark v1.5.1
  • CIS Kubernetes Benchmark v1.6.1
  • Kubernetes NIST.SP.800-190
  • Kubernetes v.1.13 CloudGuard Best Practices
  • Kubernetes v.1.14 CloudGuard Best Practices

Updated over 1 year ago