The API server should not use basic authentication
Set up the kubernetes integration.
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Description
Do not use basic authentication.
Rationale
Basic authentication uses plaintext credentials for authentication. Currently, the basic authentication credentials last indefinitely, and the password cannot be changed without restarting the API server. The basic authentication is currently supported for convenience. Hence, basic authentication should not be used.
Audit
Run the following command on the master node:
ps -ef | grep kube-apiserver
Verify that the --basic-auth-file argument does not exist.
Follow the documentation and configure alternate mechanisms for authentication. Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the master node and remove the --basic-auth-file=<filename> parameter.
Impact
You will have to configure and use alternate authentication mechanisms such as tokens and certificates. Username and password for basic authentication could no longer be used.
Default value
By default, basic authentication is not set.
References
- https://kubernetes.io/docs/admin/kube-apiserver/
- https://kubernetes.io/docs/admin/authentication/#static-password-file
CIS controls
Version 6
16.14 Encrypt/Hash All Authentication Files And Monitor Their Access - Verify that all authentication files are encrypted or hashed and that these files cannot be accessed without root or administrator privileges. Audit all access to password files in the system.
Version 7
16.4 Encrypt or Hash all Authentication Credentials - Encrypt or hash with a salt all authentication credentials when stored.
