Classification:

compliance

Framework:

cis-kubernetes

Control:

1.1.12

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Set up the kubernetes integration.

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.

Audit

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

ps -ef | grep etcd

Based on the etcd data directory found above, run the command:

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

Verify 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 command (based on the etcd data directory found above): chown etcd:etcd /var/lib/etcd

Impact

None

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

Version 6

14 Controlled Access Based on the Need to Know

Version 7

5.2 Maintain Secure Images - Maintain secure images or templates for all systems in the enterprise based on the organization’s approved configuration standards. Any new system deployment or existing system that becomes compromised should be imaged using one of those images or templates.