| name | cis-k8s-v1110-2.1 |
| description | Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) |
| category | cis-k8s |
| version | 1.11.0 |
| author | cyberstrike-official |
| tags | ["cis","kubernetes","etcd","tls","encryption"] |
| cis_id | 2.1 |
| cis_benchmark | CIS Kubernetes Benchmark v1.11.0 |
| tech_stack | ["kubernetes"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated)
Profile Applicability
Description
Configure TLS encryption for the etcd service.
Rationale
etcd is a highly-available key value store used by Kubernetes deployments for persistent storage of all of its REST API objects. These objects are sensitive in nature and should be encrypted in transit.
Impact
Client connections only over TLS would be served.
Audit
Run the following command on the etcd server node
ps -ef | grep etcd
Verify that the --cert-file and the --key-file arguments are set as appropriate.
Remediation
Follow the etcd service documentation and configure TLS encryption.
Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master node and set the below parameters.
--cert-file=</path/to/ca-file>
--key-file=</path/to/key-file>
Default Value
By default, TLS encryption is not set.
References
- https://coreos.com/etcd/docs/latest/op-guide/security.html
- https://kubernetes.io/docs/admin/etcd/
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|
| v8 | 3.11 Encrypt Sensitive Data at Rest | | X | X |
| v7 | 14.4 Encrypt All Sensitive Information in Transit | | X | X |
