SV-242445r961863: The Kubernetes component etcd must be owned by etcd. | Kubernetes STIG SCAP Benchmark

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Assessment Title

Rule Text

The Kubernetes component etcd must be owned by etcd.

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 the Control Plane would be compromised. The scheduler will implement the changes immediately. Many of the security settings within the document are implemented through this file.

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 ownership of the Kubernetes etcd files by using the command:

stat -c %U:%G /var/lib/etcd/* | grep -v etcd:etcd

If the command returns any non etcd:etcd file permissions, 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:242445
if [ ! -d "/var/lib/etcd" ]; then echo "PASS"; exit 0; fi; for file in /var/lib/etcd/*; do [ -w "$file" ] && chown etcd:etcd "$file"; done; if [ -n "$(find /var/lib/etcd -type f -not -group etcd -not -user etcd)" ]; then echo "FAIL"; exit 1; fi; echo "PASS"; exit 0

Remediation

Change the ownership of the manifest files to etcd:etcd by executing the command:

chown etcd:etcd /var/lib/etcd/*