Prevent pods from sharing the host process ID namespace

高レベル 1自動eks-auto

説明

Prevent pods from sharing the host process ID namespace by restricting spec.hostPID: true in EKS Auto Mode workload namespaces. In the EKS Pod Security Standards model, this is enforced through Pod Security Admission or an equivalent policy engine, and baseline or restricted enforcement should be used for workload namespaces where host process namespace sharing is not approved. Requires kubectl with cluster-wide read access (KUBECONFIG); system namespaces are excluded and listed resources must be remediated or documented as exceptions.

チェック方法

監査方法: シェルコマンド

shell

out=$(kubectl get pods -A -o go-template='{{range .items}}{{.metadata.namespace}} {{.metadata.name}} {{.spec.hostPID}}{{"\n"}}{{end}}') || exit 1
bad=$(printf '%s\n' "$out" | awk -v ex='^(kube-system|kube-public|kube-node-lease)$' 'NF && $1 !~ ex && ($3=="true")')
if [ -z "$bad" ]; then echo compliant; else printf '%s\n' "$bad" | head -n 25; fi

期待される出力: compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

Configure Pod Security Admission on workload namespaces so pods that request spec.hostPID: true are denied at admission time. Use enforce for remediation because it rejects violating pods. Use warn and audit as rollout and visibility controls, but do not treat them as enforcement. For this control, baseline is sufficient because it prohibits hostPID, while restricted provides stronger hardening for workload namespaces that can meet the additional requirements. Update each workload namespace with the restricted enforcement label. kubectl label ns $NAMESPACE pod-security.kubernetes.io/enforce=restricted --overwrite If restricted is too disruptive for a valid workload namespace, enforce baseline as the minimum profile for this specific control.

プロパティ

オペレーティングシステム: すべて
タグ: eks-autopolicies
参照: CIS Amazon Elastic Kubernetes Service (EKS) Auto Mode Benchmark v1.0.0 - 4.2.2 Prevent pods from sharing the host process ID namespace

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target eks-auto