Admission controller AlwaysAdmin is disabled
Set up the kubernetes integration.
Description
Do not allow all requests.
Rationale
Setting admission control plugin AlwaysAdmit allows all requests and do not filter any requests. The AlwaysAdmit admission controller was deprecated in Kubernetes v1.13. Its behavior was equivalent to turning off all admission controllers.
Audit
Run the following command on the master node:
ps -ef | grep kube-apiserver
Verify the --enable-admission-plugins argument’s value (if set) does not include AlwaysAdmit.
Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the master node and either remove the –enable-admission-plugins parameter, or set it to a value that does not include AlwaysAdmit.
Impact
Only requests explicitly allowed by the admissions control plugins would be served.
Default value
AlwaysAdmit is not in the list of default admission plugins.
References
- https://kubernetes.io/docs/admin/kube-apiserver/ 2. https://kubernetes.io/docs/admin/admission-controllers/#alwaysadmit
CIS controls
Version 6 14 Controlled Access Based on the Need to Know Controlled Access Based on the Need to Know Version 7 14 Controlled Access Based on the Need to Know Controlled Access Based on the Need to Know
