cis-k8s-v200-4.1.4

DevOps & Security

If proxy kubeconfig file exists ensure ownership is set to root:root (Manual)

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4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual)

Profile Applicability

Level 1 - Worker Node

Description

If kube-proxy is running, ensure that the file ownership of its kubeconfig file is set to root:root.

Rationale

The kubeconfig file for kube-proxy controls various parameters for the kube-proxy service in the worker node. You should set its file ownership to maintain the integrity of the file. The file should be owned by root:root.

Impact

None

Audit

Find the kubeconfig file being used by kube-proxy by running the following command:

ps -ef | grep kube-proxy

If kube-proxy is running, get the kubeconfig file location from the --kubeconfig parameter.

To perform the audit:

Run the below command (based on the file location on your system) on the each worker node. For example,

stat -c %U:%G <path><filename>

Verify that the ownership is set to root:root.

Remediation

Run the below command (based on the file location on your system) on the each worker node. For example,

chown root:root <proxy kubeconfig file>

Default Value

By default, proxy file ownership is set to root:root.

References

https://kubernetes.io/docs/admin/kube-proxy/

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts - Restrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user's primary, non-privileged account.	*	*	*
v7	4 Controlled Use of Administrative Privileges - Controlled Use of Administrative Privileges