Minimize the admission of privileged containers

Cómo se verifica

Método de auditoría: Comando de shell

out=$(kubectl get pods -A -o go-template='{{range .items}}{{$ns:=.metadata.namespace}}{{$p:=.metadata.name}}{{range .spec.containers}}{{$ns}} {{$p}} {{.name}} {{with .securityContext}}{{.privileged}}{{end}}{{"\n"}}{{end}}{{range .spec.initContainers}}{{$ns}} {{$p}} {{.name}} {{with .securityContext}}{{.privileged}}{{end}}{{"\n"}}{{end}}{{range .spec.ephemeralContainers}}{{$ns}} {{$p}} {{.name}} {{with .securityContext}}{{.privileged}}{{end}}{{"\n"}}{{end}}{{end}}') || exit 1
bad=$(printf '%s\n' "$out" | awk -v ex='^(kube-system|kube-public|kube-node-lease|gatekeeper-system|azure-arc)$' 'NF && $1 !~ ex && ($4=="true")')
if [ -z "$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

Add policies to each namespace in the cluster which has user workloads to restrict the admission of privileged containers. To enable PSA for a namespace in your cluster, set the pod-security.kubernetes.io/enforce label with the policy value you want to enforce. kubectl label --overwrite ns NAMESPACE pod-security.kubernetes.io/enforce=restricted The above command enforces the restricted policy for the NAMESPACE namespace. You can also enable Pod Security Admission for all your namespaces. For example: kubectl label --overwrite ns --all pod-security.kubernetes.io/warn=baseline 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

Verificar este host

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

tmaegis scan --target aks