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V-254574

CAT II (Medium)

Rancher RKE2 must remove old components after updated versions have been installed.

Rule ID

SV-254574r961677_rule

STIG

Rancher Government Solutions RKE2 Security Technical Implementation Guide

Version

V2R6

CCIs

CCI-002617

Discussion

Previous versions of Rancher RKE2 components that are not removed after updates have been installed may be exploited by adversaries by causing older components to execute which contain vulnerabilities. When these components are deleted, the likelihood of this happening is removed.

Check Content

To view all pods and the images used to create the pods, from the RKE2 Control Plane, run the following command:

kubectl get pods --all-namespaces -o jsonpath="{..image}" | \
tr -s '[[:space:]]' '\n' | \
sort | \
uniq -c

Review the images used for pods running within Kubernetes.
If there are multiple versions of the same image, this is a finding.

Fix Text

Remove any old pods that are using older images. On the RKE2 Control Plane, run the command:

kubectl delete pod podname
(Note: "podname" is the name of the pod to delete.)

Run the command:
systemctl restart rke2-server