SV-242459r961863: The Kubernetes etcd must have file permissions set to 644 or more restrictive. | Kubernetes STIG SCAP Benchmark

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Assessment Title

Rule Text

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

Description

Discussion Text

The Kubernetes etcd key-value store provides a way to store data to the Control Plane. If these files can be changed, data to API object and Control Plane would be compromised.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000366

References

DPMS Target Kubernetes DISA DPMS Target Kubernetes 5376

Checks

DISA STIG (Manual Reference)

Review the permissions of the Kubernetes etcd by using the command:

ls -AR /var/lib/etcd/*

If any of the files have permissions more permissive than "644", this is a finding.

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL definition: oval:mil.disa.stig.kubernetes:def:242459
for file in /var/lib/etcd/*; do if [ -f "$file" ]; then [ "$(stat -c "%a" "$file")" -lt 644 ] && echo "FAIL" && exit 1; fi; done; echo "PASS"; exit 0

Remediation

Change the permissions of the manifest files to "644" by executing the command:

chmod -R 644 /var/lib/etcd/*