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V-242407

CAT II (Medium)

The Kubernetes KubeletConfiguration files must have file permissions set to 644 or more restrictive.

Rule ID

SV-242407r960960_rule

STIG

Kubernetes Security Technical Implementation Guide

Version

V2R6

CCIs

CCI-001499

Discussion

The kubelet configuration file contains the runtime configuration of the kubelet service. If an attacker can gain access to this file, changes can be made to open vulnerabilities and bypass user authorizations inherit within Kubernetes with RBAC implemented.

Check Content

On the Kubernetes Control Plane and Worker nodes, run the command:
ps -ef | grep kubelet

Check the config file (path identified by: --config):

Change to the directory identified by --config (example /etc/sysconfig/) and run the command:
ls -l kubelet

Each KubeletConfiguration file must have permissions of "644" or more restrictive.

If any KubeletConfiguration file is less restrictive than "644", this is a finding.

Fix Text

On the Kubernetes Control Plane and Worker nodes, run the command:
ps -ef | grep kubelet

Check the config file (path identified by: --config):

Change to the directory identified by --config (example /etc/sysconfig/) and run the command:
chmod 644 kubelet

To verify the change took place, run the command:
ls -l kubelet

The kubelet file should now have the permissions of "644".