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Ensure that the admission control plugin AlwaysAdmit is not set (API Server)

Risk Level: High
Cloud Entity: Pods
CloudGuard Rule ID: D9.K8S.IAM.01
Covered by Spectral: Yes
Category: Compute

GSL LOGIC

KubernetesPod where labels contain [value='kube-apiserver'] and namespace = 'kube-system' should have spec.containers with [parsedArgs contain [key like 'enable-admission-plugins' and value unlike '%AlwaysAdmit%']]

REMEDIATION

Edit the API server pod specification file $apiserverconf
on the master node and set the --enable-admission-plugins parameter to a
value that does not include AlwaysAdmit.

References

  1. https://kubernetes.io/docs/admin/kube-apiserver/
  2. https://kubernetes.io/docs/admin/admission-controllers/#alwaysadmit

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 7 months ago