| name | cis-k8s-v200-2.1 |
| description | Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) |
| category | cis-k8s |
| version | 2.0.0 |
| author | cyberstrike-official |
| tags | ["cis","kubernetes","etcd"] |
| cis_id | 2.1 |
| cis_benchmark | CIS Kubernetes Benchmark v2.0.0 |
| tech_stack | ["kubernetes"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
CIS Kubernetes Benchmark v2.0.0 - Control 2.1
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 Procedure
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 Encrypt sensitive data at rest on servers, applications, and databases containing sensitive data. Storage-layer encryption, also known as server-side encryption, meets the minimum requirement of this Safeguard. Additional encryption methods may include application-layer encryption, also known as client-side encryption, where access to the data storage device(s) does not permit access to the plain-text data. | | ● | ● |
| v7 | 14.4 Encrypt All Sensitive Information in Transit Encrypt all sensitive information in transit. | | ● | ● |
Profile
Level 1 - Master Node (Automated)