cis-k8s-v1110-1-1-12

name	cis-k8s-v1110-1.1.12
description	Ensure that the etcd data directory ownership is set to etcd:etcd (Automated)
category	cis-k8s
version	1.11.0
author	cyberstrike-official
tags	["cis","kubernetes","control-plane","config-files","file-ownership","etcd","data-directory"]
cis_id	1.1.12
cis_benchmark	CIS Kubernetes Benchmark v1.11.0
tech_stack	["kubernetes"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated)

Profile Applicability

• Level 1 - Master Node

Description

Ensure that the etcd data directory ownership is set to etcd:etcd.

Rationale

etcd is a highly-available key-value store used by Kubernetes deployments for persistent storage of all of its REST API objects. This data directory should be protected from any unauthorized reads or writes. It should be owned by etcd:etcd.

Impact

None

Audit

On the etcd server node, get the etcd data directory, passed as an argument --data-dir, from the below command:

ps -ef | grep etcd

Run the below command (based on the etcd data directory found above). For example,

stat -c %U:%G /var/lib/etcd

Verify that the ownership is set to etcd:etcd.

Remediation

On the etcd server node, get the etcd data directory, passed as an argument --data-dir, from the below command:

ps -ef | grep etcd

Run the below command (based on the etcd data directory found above). For example,

chown etcd:etcd /var/lib/etcd

Default Value

By default, etcd data directory ownership is set to etcd:etcd.

References

1. https://coreos.com/etcd/docs/latest/op-guide/configuration.html#data-dir
2. https://kubernetes.io/docs/admin/etcd/

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	3.3 Configure Data Access Control Lists - Configure data access control lists based on a user's need to know. Apply data access control lists, also known as access permissions, to local and remote file systems, databases, and applications.	*	*