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Oracle Kubernetes Engine (OKE)

TMA-OKE-4.1.6

Ensure that Service Account Tokens are only mounted where necessary

AltaNivel 1Automatizadaoke

Descripción

Service account tokens in OKE should be mounted only for Pods that require Kubernetes API access or an explicitly configured workload identity flow. Kubernetes supports disabling automatic token mounting at the Pod or ServiceAccount level, and workloads that need OCI access through OKE workload identity should use a dedicated service account rather than relying on broad default token mounting. Requires kubectl with cluster-wide read access (KUBECONFIG); system namespaces are excluded and listed resources must be remediated or documented as exceptions. Reports pods with an auto-mounted service account token (kube-api-access-* volume).

Cómo se verifica

Método de auditoría: Comando de shell

shell
out=$(kubectl get pods -A -o go-template='{{range .items}}{{.metadata.namespace}} {{.metadata.name}}{{range .spec.volumes}} {{.name}}{{end}}{{"\n"}}{{end}}') || exit 1
bad=$(printf '%s\n' "$out" | awk -v ex='^(kube-system|kube-public|kube-node-lease)$' 'NF && $1 !~ ex && ($0 ~ / kube-api-access-/)')
if [ -z "$bad" ]; then echo compliant; else printf '%s\n' "$bad" | head -n 25; fi
Salida esperada
compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Apply the following steps to reduce unnecessary service account token mounting in OKE: • Set automountServiceAccountToken to false for Pods and ServiceAccounts that do not require Kubernetes API access. This reduces unnecessary default token auto mounting. • Update workloads to use a dedicated serviceAccountName only where a service account token is operationally required, instead of inheriting token behavior from the namespace default service account. Each application should use its own dedicated service account. • For workloads that need OCI access, use OKE workload identity with a dedicated service account rather than broad default token mounting. OKE workload identity uses the combination of cluster, namespace, and service account to grant access to OCI resources for the intended workload.

Propiedades

Sistemas operativos
Cualquiera
Etiquetas
okepoliciesrbac
Referencia
CIS Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE) Benchmark v2.0.0 - 4.1.6 Ensure that Service Account Tokens are only mounted where necessary

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell
tmaegis scan --target oke