Older Universal Control Plane (MKE) and Docker Trusted Registry (DTR) images must be removed from all cluster nodes upon upgrading.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-260944	CNTR-MK-001600	SV-260944r966189_rule		Medium

Description
When upgrading either the UCP or DTR components of MKE, the newer images are pulled (or unpacked if offline) onto engine nodes in a cluster. Once the upgrade is complete, one must manually remove all old image version from the cluster nodes to meet the requirements of this control. When upgrading the Docker Engine - Enterprise component of MKE, the old package version is automatically replaced.

STIG	Date
Mirantis Kubernetes Engine Security Technical Implementation Guide	2024-06-17

Details

Check Text ( C-64673r966187_chk )
Verify all outdated MKE and DTR container images have been removed from all nodes in the cluster. Via CLI: As an MKE admin, execute the following command using a client bundle: docker images --filter reference='mirantis/[ucp]' docker images --filter reference='registry.mirantis.com/msr/[msr]' Verify there are no tags listed older than the currently installed versions of MKE and DTR. If any of the tags listed are older than the currently installed versions of MKE and DTR, then this is a finding. If no tags are listed, this is not a finding.

Check Text ( C-64673r966187_chk )

Verify all outdated MKE and DTR container images have been removed from all nodes in the cluster.

Via CLI: As an MKE admin, execute the following command using a client bundle:

docker images --filter reference='mirantis/[ucp]*'
docker images --filter reference='registry.mirantis.com/msr/[msr]*'

Verify there are no tags listed older than the currently installed versions of MKE and DTR.

If any of the tags listed are older than the currently installed versions of MKE and DTR, then this is a finding. If no tags are listed, this is not a finding.

Fix Text (F-64581r966188_fix)
Remove all outdated MKE and DTR container images from all nodes in the cluster: Via CLI: As an MKE admin, execute the following commands using a client bundle: docker rmi -f $(docker images --filter reference='mirantis/ucp:[outdated_tags]' -q) docker rmi -f $(docker images --filter reference='registry.mirantis.com/msr/[msr]:[outdated_tags]' -q)