cyberstrikeus 1.2.28 Ensure that encryption providers are appropriately configured (Manual)
Profile Applicability
- Level 1 - Master Node
Description
Where etcd encryption is used, appropriate providers should be configured.
Rationale
Where etcd encryption is used, it is important to ensure that the appropriate set of encryption providers is used. Currently, the aescbc, kms, and secretbox are likely to be appropriate options.
Impact
None
Audit
Run the following command on the Control Plane node:
ps -ef | grep kube-apiserver
Get the EncryptionConfig file set for --encryption-provider-config argument. Verify that aescbc, kms, or secretbox is set as the encryption provider for all the desired resources.
Remediation
Follow the Kubernetes documentation and configure a EncryptionConfig file. In this file, choose aescbc, kms, or secretbox as the encryption provider.
Default Value
By default, no encryption provider is set.
References
- https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/
- https://acotten.com/post/kube17-security
- https://kubernetes.io/docs/reference/command-line-tools-reference/kube-apiserver/
- https://github.com/kubernetes/enhancements/issues/92
- https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/#providers
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.11 Encrypt Sensitive Data at Rest | x | x | |
| v7 | 14.8 Encrypt Sensitive Information at Rest | x |