Minimize the admission of containers wishing to share the host IPC namespace

ÉlevéeNiveau 1Automatiséeaks

Description

Minimize the admission of pods that request spec.hostIPC=true so that only tightly controlled, explicitly approved platform workloads can share the host IPC namespace in AKS. As it relates to RBAC and service accounts, this means users, groups, and service accounts with pod or controller deployment rights should not broadly be able to create or update workloads that enable host IPC sharing, because AKS relies on RBAC to scope what identities can ... Requires kubectl with cluster-wide read access (KUBECONFIG); system namespaces are excluded and listed resources must be remediated or documented as exceptions.

Méthode de vérification

Méthode d'audit: Commande shell

shell

out=$(kubectl get pods -A -o go-template='{{range .items}}{{.metadata.namespace}} {{.metadata.name}} {{.spec.hostIPC}}{{"\n"}}{{end}}') || exit 1
bad=$(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

Sortie attendue: compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

Add policies to each namespace in the cluster which has user workloads to restrict the admission of hostIPC 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

Propriétés

Systèmes d'exploitation: Tous
Étiquettes: akspoliciespod-security
Référence: CIS Azure Kubernetes Service (AKS) Benchmark v2.0.0 - 4.2.3 Minimize the admission of containers wishing to share the host IPC namespace

Vérifier cet hôte

Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.

shell

tmaegis scan --target aks