Privileged container with sensitive mount

In this lab you will be creating a container with privileged Security Context, with root level access in the default Namespace of your EKS Cluster. This privileged container will also have a sensitive directory from the host, mounted and accessible as a volume within your container.

This exercise will generate two different findings, PrivilegeEscalation:Kubernetes/PrivilegedContainer which indicates that a container was launched with Privileged permissions, and Persistence:Kubernetes/ContainerWithSensitiveMount indicating a sensitive external host path mounted inside the container.

To simulate the finding you'll be using a pre-configure manifest with some specific parameters already set:

~/environment/eks-workshop/modules/security/Guardduty/mount/privileged-pod-example.yaml

apiVersion: v1
kind: Pod
metadata:
  name: ubuntu-privileged
spec:
  containers:
    - name: ubuntu-privileged
      image: ubuntu
      ports:
        - containerPort: 22
      securityContext:
        privileged: true
      volumeMounts:
        - mountPath: /host-etc
          name: host-etc
  volumes:
    - name: host-etc
      hostPath:
        path: /etc
  restartPolicy: Never

A

Setting SecurityContext: privileged: true grants full root privileges to the Pod

B

mountPath: /host-etc specifies that the mapped host volume will be accessible inside the container at /host-etc

C

path: /etc specifies that /etc directory from the host system will be the source directory for the mount

Apply the manifest shown above with the following command:

~$kubectl apply -f ~/environment/eks-workshop/modules/security/Guardduty/mount/privileged-pod-example.yaml

note

This Pod will just run once, until it reaches the State Completed

Within a few minutes we'll see the two finding PrivilegeEscalation:Kubernetes/PrivilegedContainer and Persistence:Kubernetes/ContainerWithSensitiveMount in the GuardDuty Findings console.

Once again take sometime to analyze the Finding details, Action, and Detective Investigation.

Cleanup the Pod by running the command below:

~$kubectl delete -f ~/environment/eks-workshop/modules/security/Guardduty/mount/privileged-pod-example.yaml