Ensure ECR repositories are not exposed to all AWS accounts

Amazon Elastic Container Registry (ECR) is a managed Docker registry service that makes it easy for DevOps teams to store, manage and deploy Docker container images. Since docker containers need to interact with other services such as Databases, apis etc, sensitive data my be contained with the docker image. For this reason it is considered a security best practice to not allow public access to your repository. Ensuring that it is restricted will help you with PCI-DSS and GDPR Compliance.

Audit & Remediation

  • Login into your AWS account
  • Navigate to the ECR service at: https://console.aws.amazon.com/ecr
  • On the ECR main page, select the hyperlink for the repo you would like to inspect.



  • On the left hand panel, under Amazon ECR, under Repositories select Permissions.
  • In the main panel, under Permissions if you see information, an access policy has been set.
  • Validate under the Effect where it states Allow that the Principle is not set to *.



  • If Everyone or * is set, select the orange Edit button in the top right hand.
  • Remove the checkbox next to Everyone in order to remove access to all AWS accounts.
  • Add in a Service principle for with-in your account or if cross account access is needed, specify the account numbers in your own organization.



  • Repeat the outlined steps for each repository.
  • Repeat the outlined steps for each region that you have ECR repositories in.
  • Repeat the outlined steps for each AWS account that you have.
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