DKER-EE-003610 - Only trusted, signed images must be on Universal Control Plane (UCP) in Docker Enterprise.


The UCP and Docker Trusted Registry (DTR) components of Docker Enterprise can be used in concert to perform an integrity check of organization-defined software at startup. In the context of Docker Enterprise, software would be analogous to Docker images that have been pulled from trusted or untrusted sources. Docker Hub is the most common upstream endpoint for retrieving Docker images. However, only 'Docker Certified' images on Docker Hub are considered trusted and come with SLAs and trusted signatures from their respective vendors. All other images from Docker Hub or other external registries must be carefully inspected and triaged prior to use. Docker Content Trust (DCT) provides for content integrity checking mechanisms on Docker images. DCT can be combined with LDAP, DTR and UCP to enforce image signatures from users/accounts in LDAP. Therefore, to meet the requirements of this control, it is imperative that UCP has LDAP integration enabled and that content trust enforcement is enabled and properly configured.

An operational requirement of this control is that of the required use of an established continuous integration and deployment workflow that effectively dictates exactly what software is allowed to run on UCP.

Satisfies: SRG-APP-000386, SRG-APP-000480, SRG-APP-000484, SRG-APP-000485, SRG-APP-000475

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.


This fix only applies to the UCP component of Docker Enterprise.

Pull and run only signed images on a UCP cluster.

via CLI:

Linux: When using a client bundle, set the 'DOCKER_CONTENT_TRUST' environment variable to a value of '1' prior the execution of any of the following commands: docker push, docker build, docker create, docker pull and docker run.

See Also

Item Details


References: 800-53|CM-7(5)(b), 800-53|SI-7(1), 800-53|SI-7(5), 800-53|SI-7(8), CAT|II, CCI|CCI-001774, CCI|CCI-002710, CCI|CCI-002715, CCI|CCI-002723, CCI|CCI-002724, Rule-ID|SV-235839r627644_rule, STIG-ID|DKER-EE-003610, STIG-Legacy|SV-104849, STIG-Legacy|V-95711, Vuln-ID|V-235839

Plugin: Unix

Control ID: ae9c0c8e1f1ee7be29f74990c9450fd47b6ad9c89c500a7878922835a16afff8