Guides

Minimize the admission of containers wishing to share the host IPC namespace (PSP)

Do not generally permit containers to be run with the hostIPC flag set to true. A container running in the host's IPC namespace can use IPC to interact with processes outside the container. There should be at least one CloudGuard Admission Control (CAC) rule or PodSecurityPolicy (PSP) defined which does not permit containers to share the host IPC namespace. If you have a requirement to containers which require hostIPC, this should be defined in a separate CAC or PSP and you should carefully check RBAC controls to ensure that only limited service accounts and users are given permission to access that CAC or PSP.

Suggest Edits

Risk Level: High
Cloud Entity: Pod Security Policies
CloudGuard Rule ID: D9.K8S.IAM.20
Covered by Spectral: Yes
Category: Security, Identity, & Compliance

GSL LOGIC

List<KubernetesPodSecurityPolicy> where items length() > 0 should have items contain [spec.hostIPC != 'true']

REMEDIATION

Create a CAC or PSP as described in the Kubernetes documentation, ensuring that the .spec.hostIPC field is omitted or set to false.

References

  1. https://kubernetes.io/docs/concepts/policy/pod-security-policy

Pod Security Policies

A Pod Security Policy is a cluster-level resource that controls security sensitive aspects of the pod specification. The PodSecurityPolicy objects define a set of conditions that a pod must run with in order to be accepted into the system, as well as defaults for the related fields.

Compliance Frameworks

  • CIS Amazon Elastic Kubernetes Service (EKS) Benchmark v1.0.1
  • CIS Amazon Elastic Kubernetes Service (EKS) Benchmark v1.1.0
  • CIS Amazon Elastic Kubernetes Service (EKS) Benchmark v1.2.0
  • CIS Amazon Elastic Kubernetes Service (EKS) Benchmark v1.3.0
  • CIS Google Kubernetes Engine (GKE) Benchmark v1.2.0
  • CIS Google Kubernetes Engine (GKE) Benchmark v1.4.0
  • CIS Kubernetes Benchmark v1.20
  • CIS Kubernetes Benchmark v1.23
  • CIS Kubernetes Benchmark v1.5.1
  • CIS Kubernetes Benchmark v1.6.1
  • CIS Microsoft Kubernetes Engine (AKS) Benchmark v1.1.0
  • CIS Microsoft Kubernetes Engine (AKS) Benchmark v1.3.0
  • Kubernetes NIST.SP.800-190
  • Kubernetes v.1.13 CloudGuard Best Practices
  • Kubernetes v.1.14 CloudGuard Best Practices

Updated over 1 year ago