Minimize the admission of containers with allowPrivilegeEscalation

높음레벨 1자동oke

설명

Minimize the admission of containers with securityContext.allowPrivilegeEscalation: true in OKE so that general workload namespaces do not permit processes to gain more privileges than their parent process. In OKE, this should be enforced through Pod Security Admission or an equivalent policy engine. Requires kubectl with cluster-wide read access (KUBECONFIG); system namespaces are excluded and listed resources must be remediated or documented as exceptions. Containers that do not explicitly set allowPrivilegeEscalation: false are reported.

점검 방법

감사 방식: 셸 명령

shell

out=$(kubectl get pods -A -o go-template='{{range .items}}{{$ns:=.metadata.namespace}}{{$p:=.metadata.name}}{{range .spec.containers}}{{$ns}} {{$p}} {{.name}} {{with .securityContext}}{{.allowPrivilegeEscalation}}{{end}}{{"\n"}}{{end}}{{range .spec.initContainers}}{{$ns}} {{$p}} {{.name}} {{with .securityContext}}{{.allowPrivilegeEscalation}}{{end}}{{"\n"}}{{end}}{{range .spec.ephemeralContainers}}{{$ns}} {{$p}} {{.name}} {{with .securityContext}}{{.allowPrivilegeEscalation}}{{end}}{{"\n"}}{{end}}{{end}}') || exit 1
bad=$(printf '%s\n' "$out" | awk -v ex='^(kube-system|kube-public|kube-node-lease)$' 'NF && $1 !~ ex && ($4!="false")')
if [ -z "$bad" ]; then echo compliant; else printf '%s\n' "$bad" | head -n 25; fi

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Configure Pod Security Admission on workload namespaces so containers that do not explicitly set securityContext.allowPrivilegeEscalation=false are denied at admission time. In OKE, use restricted for workload namespaces, or an equivalent policy engine, because restricted requires allowPrivilegeEscalation=false. Use enforce for actual remediation, since warn and audit only report violations and do not block pod creation. Label each workload namespace to enforce restricted. kubectl label ns NAMESPACE pod-security.kubernetes.io/enforce=restricted --overwrite Add warn and audit during rollout if you want visibility into violations before or alongside enforcement.

속성

운영 체제: 모두
태그: okepoliciespod-security
참고 자료: CIS Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE) Benchmark v2.0.0 - 4.2.5 Minimize the admission of containers with allowPrivilegeEscalation

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shell

tmaegis scan --target oke