Kubernetes Pod created with a Sensitive hostPath Volume

This rule detects when a pod is created with a sensitive volume of type hostPath. A hostPath volume type mounts a sensitive file or folder from the node to the container. If the container gets compromised, the attacker can use this mount for gaining access to the node. There are many ways a container with unrestricted access to the host filesystem can escalate privileges, including reading data from other containers, and accessing tokens of more privileged pods.

Rule type: query

Rule indices:

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: None (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Version: 100

Rule authors:

Rule license: Elastic License v2

kubernetes.audit.objectRef.resource:"pods"
  and kubernetes.audit.verb:("create" or "update" or "patch")
  and kubernetes.audit.requestObject.spec.volumes.hostPath.path:("/" or "/proc" or "/root" or "/var" or "/var/run/docker.sock" or "/var/run/crio/crio.sock" or "/var/run/cri-dockerd.sock" or "/var/lib/kubelet" or "/var/lib/kubelet/pki" or "/var/lib/docker/overlay2" or "/etc" or "/etc/kubernetes" or "/etc/kubernetes/manifests" or "/home/admin")