cis-docker-2.7

DevOps & Security

Ensure devicemapper storage driver is not used

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Ensure devicemapper storage driver is not used (Manual)

Profile Applicability

• Level 1 - Docker - Linux

Description

Do not use devicemapper as the storage driver for your Docker instance.

Rationale

The devicemapper storage driver is deprecated in favor of overlay2, and has been removed in Docker Engine v25.0.

Impact

If you are using Device Mapper, you must migrate to a supported storage driver before upgrading to Docker Engine v25.0.

Audit Procedure

Execute the below command and verify that devicemapper is not used as storage driver:

docker info --format 'Storage Driver: {{ .Driver }}'

The above command should not return devicemapper.

Remediation

Do not explicitly use devicemapper as storage driver.

For example, do not start Docker daemon as below:

dockerd --storage-driver devicemapper

Default Value

By default, Docker uses overlay2 as the storage driver on most of the platforms. The default storage driver can vary based on your OS vendor. You should use the storage driver that is recommended by your preferred vendor and which is in line with policy around the applications which are being deployed.

References

https://docs.docker.com/storage/storagedriver/select-storage-driver/

CIS Controls

Controls Version: v8

Control: 16 Application Software Security

Manage the security life cycle of in-house developed, hosted, or acquired software to prevent, detect, and remediate security weaknesses before they can impact the enterprise.

IG 1: IG 2: IG 3:

Controls Version: v7

Control: 18 Application Software Security

Application Software Security