performing-kubernetes-etcd-security-assessment

name	performing-kubernetes-etcd-security-assessment
description	Assess the security posture of Kubernetes etcd clusters by evaluating encryption at rest, TLS configuration, access controls, backup encryption, and network isolation. Use when working with performing kubernetes etcd security assessment.
domain	cybersecurity
subdomain	container-security
tags	["kubernetes","etcd","encryption","tls","security-assessment","backup","secrets","control-plane"]
version	1.0
author	oyi77
license	Apache-2.0
nist_csf	["PR.PS-01","PR.IR-01","ID.AM-08","DE.CM-01"]

Performing Kubernetes etcd Security Assessment

Overview

etcd is the distributed key-value store that serves as Kubernetes' backing store for all cluster data, including Secrets, RBAC policies, ConfigMaps, and workload configurations. Without proper hardening, etcd exposes all cluster secrets in plaintext, making it the highest-value target for attackers who gain control plane access. A comprehensive security assessment covers encryption at rest, TLS for transport, access control, backup security, and network isolation.

When to Use

Trigger phrases:

• "performing kubernetes etcd security assessment"

• "Assess the security posture of Kubernetes etcd clusters by evaluating encryption"

• When conducting security assessments that involve performing kubernetes etcd security assessment

• When following incident response procedures for related security events

• When performing scheduled security testing or auditing activities

• When validating security controls through hands-on testing

Prerequisites

• Access to Kubernetes control plane nodes
• SSH access to etcd cluster nodes (or etcdctl configured)
• CIS Kubernetes Benchmark reference document
• Understanding of TLS certificate management and EncryptionConfiguration

Assessment Areas

This section covers assessment areas for performing kubernetes etcd security assessment.

• Ensure all prerequisites are met before proceeding
• Follow the documented workflow steps in sequence
• Record results and any anomalies encountered during this phase

1. Encryption at Rest

Verify that Kubernetes encrypts Secret data stored in etcd:

# Check if EncryptionConfiguration is configured on API server
ps aux | grep kube-apiserver | grep encryption-provider-config

# View the encryption configuration
cat /etc/kubernetes/enc/encryption-config.yaml

Expected secure configuration:

apiVersion: apiserver.config.k8s.io/v1
kind: EncryptionConfiguration
resources:
  - resources:
      - 
       
    
       
          
              
               
        {}