ECR repository is publicly accessible

Docs > Datadog Security > Code Security > Infrastructure as Code (IaC) Security > IaC Security Rules > ECR repository is publicly accessible

Metadata

Id: fb5a5df7-6d74-4243-ab82-ff779a958bfd

Cloud Provider: AWS

Platform: Ansible

Severity: Critical

Category: Access Control

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Provider Reference

Description

ECR repository policies must not grant Allow permissions to the wildcard principal (*). This makes repositories publicly accessible and allows unauthorized accounts to pull or push container images, increasing the risk of data exposure and supply-chain compromise.

Check Ansible ECS/ECR tasks using the community.aws.ecs_ecr or ecs_ecr modules: in the resource policy document, any statement with "Effect": "Allow" must not have Principal equal to "*". Resources with an Allow statement whose Principal is "*" are flagged. Instead, specify explicit principals such as AWS account ARNs, IAM role ARNs, or service principals, or restrict access using condition keys (for example, aws:PrincipalOrgID).

Secure example with an explicit AWS account principal:

{
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": { "AWS": "arn:aws:iam::123456789012:root" },
      "Action": [ "ecr:GetDownloadUrlForLayer", "ecr:BatchGetImage" ],
      "Resource": "arn:aws:ecr:us-east-1:123456789012:repository/my-repo"
    }
  ]
}

Compliant Code Examples

- name: set-policy as object
  community.aws.ecs_ecr:
    name: needs-policy-object
    policy:
      Version: '2008-10-17'
      Statement:
      - Sid: read-only
        Effect: Allow
        Action:
        - ecr:GetDownloadUrlForLayer
        - ecr:BatchGetImage
        - ecr:BatchCheckLayerAvailability

Non-Compliant Code Examples

- name: set-policy as object
  community.aws.ecs_ecr:
    name: needs-policy-object
    policy:
      Version: '2008-10-17'
      Statement:
        - Sid: read-only
          Effect: Allow
          Principal: '*'
          Action:
            - ecr:GetDownloadUrlForLayer
            - ecr:BatchGetImage
            - ecr:BatchCheckLayerAvailability
- name: set-policy as string
  community.aws.ecs_ecr:
    name: needs-policy-string
    policy: >
        {
          "Id": "id113",
          "Version": "2012-10-17",
          "Statement": [
            {
              "Action": [
                "s3:put"
              ],
              "Effect": "Allow",
              "Resource": "arn:aws:s3:::S3B_181355/*",
              "Principal": "*"
            }
          ]
        }