Minimize the admission of containers wishing to share the host process ID namespace

높음레벨 1자동aks

설명

Minimize the admission of pods that request spec.hostPID=true so that only tightly controlled, explicitly approved platform workloads can share the host process ID namespace in AKS. In practice, this means users, groups, and service accounts with deployment rights should not broadly be able to create or update workloads that use host PID sharing, because Microsoft’s AKS identity guidance is to grant identities only the Kubernetes resources they ... Requires kubectl with cluster-wide read access (KUBECONFIG); system namespaces are excluded and listed resources must be remediated or documented as exceptions.

점검 방법

감사 방식: 셸 명령

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' "$out" | awk -v ex='^(kube-system|kube-public|kube-node-lease|gatekeeper-system|azure-arc)$' 'NF && $1 !~ ex && ($3=="true")')
if [ -z "$bad" ]; then echo compliant; else printf '%s\n' "$bad" | head -n 25; fi

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Add policies to each namespace in the cluster which has user workloads to restrict the admission of hostPID containers. Pod Security Policies and Assignments can be found by searching for Policies in the Azure Portal. A detailed step-by-step guide can be found here: https://learn.microsoft.com/en-us/azure/governance/policy/concepts/policy-for-kubernetes

속성

운영 체제: 모두
태그: akspoliciespod-security
참고 자료: CIS Azure Kubernetes Service (AKS) Benchmark v2.0.0 - 4.2.2 Minimize the admission of containers wishing to share the host process ID namespace

이 호스트 점검하기

감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target aks