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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…

Description

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.

Detection logic

Its licence does not clear it for publishing here

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Detection requirements

Platform
ContainersESXiLinuxWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source category
event_index

Known benign triggers

  • An administrator may need to attach a hostPath volume for a legitimate reason. This alert should be investigated for legitimacy by determining if the kuberenetes.audit.requestObject.spec.volumes.hostPath.path triggered is one needed by its target container/pod. For example, when the fleet managed elastic agent is deployed as a daemonset it creates several hostPath volume mounts, some of which are sensitive host directories like /proc, /etc/kubernetes, and /var/log. Add exceptions for trusted container images using the query field "kubernetes.audit.requestObject.spec.container.image"

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