Control: Pod Security Policy should prohibit containers from sharing the host process namespaces

Description

Pod Security Policy `hostPID` and `hostIPC` controls whether the Pod may share the host process namespaces. Containers in a Pod should not share the host process PID or IPC namespace. Sharing the host’s process namespace allows the container to see all of the processes on the host system. This reduces the benefit of process level isolation between the host and the containers. Under these circumstances a malicious user who has access to a container could get access to processes on the host itself, manipulate them, and even be able to kill them.

Usage

Run the control in your terminal:

powerpipe control run kubernetes_compliance.control.pod_security_policy_hostpid_hostipc_sharing_disabled

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe control run kubernetes_compliance.control.pod_security_policy_hostpid_hostipc_sharing_disabled --share

SQL

This control uses a named query:

select
  coalesce(uid, concat(path, ':', start_line)) as resource,
  case
    when host_pid or host_ipc then 'alarm'
    else 'ok'
  end as status,
  case
    when host_pid then 'Pod security policy ' || name || ' pods can share host PID namespaces.'
    when host_ipc then 'Pod security policy ' || name || ' pods can share host IPC namespaces.'
    else 'Pod security policy ' || name || ' pods cannot share host process namespaces.'
  end as reason
  
  , coalesce(context_name, '') as context_name, source_type, coalesce(path || ':' || start_line || '-' || end_line, '') as path
from
  kubernetes_pod_security_policy;

Control: Pod Security Policy should prohibit containers from sharing the host process namespaces

Description

Usage

SQL

Tags