| name | cis-oke-v170-3.2.1 |
| description | Ensure that the --anonymous-auth argument is set to false (Automated) |
| category | cis-oke |
| version | 1.7.0 |
| author | cyberstrike-official |
| tags | ["cis","oke","kubernetes","oci","worker-node","kubelet"] |
| cis_id | 3.2.1 |
| cis_benchmark | CIS Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE) Benchmark v1.7.0 |
| tech_stack | ["kubernetes","oci","oke"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
CIS OKE Benchmark v1.7.0 - Control 3.2.1
Profile Applicability
Description
Disable anonymous requests to the Kubelet server.
Rationale
When enabled, requests that are not rejected by other configured authentication methods are treated as anonymous requests. These requests are then served by the Kubelet server. You should rely on authentication to authorize access and disallow anonymous requests.
Impact
Anonymous requests will be rejected.
Audit Procedure
Audit Method 1
If using a Kubelet configuration file, check that there is an entry for authentication: anonymous: enabled set to false.
First, SSH to the relevant node.
Run the following command on each node to find the appropriate Kubelet config file:
find / -name kubelet.service
The output of the above command should return the file and location /etc/systemd/system/kublet.service which is the location of the Kubelet service config file.
Open the Kubelet service config file:
sudo more etc/systemd/system/kublet.service
Verify that the --anonymous-auth=false.
Audit Method 2
If using the api configz endpoint consider searching for the status of authentication... "anonymous":{"enabled":false} by extracting the live configuration from the nodes running kubelet.
Set the local proxy port and the following variables and provide proxy port number and node name;
HOSTNAME_PORT="localhost-and-port-number"
NODE_NAME="The-Name-Of-Node-To-Extract-Configuration"
kubectl proxy --port=8001 &
export HOSTNAME_PORT=localhost:8001 (example host and port number)
export NODE_NAME=10.0.10.4 (example node name from "kubectl get nodes")
curl -sSL "http://${HOSTNAME_PORT}/api/v1/nodes/${NODE_NAME}/proxy/configz"
Remediation
Remediation Method 1
If modifying the Kubelet service config file, edit the kubelet.service file and set the below parameter:
