Unscanned ECR image

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Metadata

Id: 9025b2b3-e554-4842-ba87-db7aeec36d35

Cloud Provider: AWS

Platform: CloudFormation

Severity: Low

Category: Observability

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Description

ECR repositories should enable image scanning on push to detect known vulnerabilities before images are deployed. This reduces the risk of running vulnerable or compromised containers.

For AWS::ECR::Repository resources, Properties.ImageScanningConfiguration.ScanOnPush must be set to true. Resources missing ImageScanningConfiguration, or with ScanOnPush set to false, will be flagged.

To remediate, set ImageScanningConfiguration.ScanOnPush to true on the repository resource.

Secure configuration example:

MyEcrRepository:
  Type: AWS::ECR::Repository
  Properties:
    RepositoryName: my-repo
    ImageScanningConfiguration:
      ScanOnPush: true

Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-11"
Resources:
  MyRepository:
    Type: AWS::ECR::Repository
    Properties:
      RepositoryName: "test-repository"
      ImageScanningConfiguration:
        ScanOnPush: "true"

{
  "AWSTemplateFormatVersion": "2010-09-11T00:00:00Z",
  "Resources": {
    "MyRepository2": {
      "Type": "AWS::ECR::Repository",
      "Properties": {
        "RepositoryName": "test-repository",
        "ImageScanningConfiguration": {
          "ScanOnPush": "true"
        }
      }
    }
  }
}

Non-Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-11"
Resources:
  MyRepository4:
    Type: AWS::ECR::Repository
    Properties:
      RepositoryName: "test-repository"
      ImageScanningConfiguration:
        ScanOnPush: "false"

{
  "AWSTemplateFormatVersion": "2010-09-09T00:00:00Z",
  "Resources": {
    "MyRepository5": {
      "Type": "AWS::ECR::Repository",
      "Properties": {
        "RepositoryName": "test-repository",
        "RepositoryPolicyText": {
          "Version": "2008-10-17",
          "Statement": [
            {
              "Sid": "AllowPushPull",
              "Effect": "Allow",
              "Principal": {
                "AWS": [
                  "arn:aws:iam::123456789012:user/Bob",
                  "arn:aws:iam::123456789012:user/Alice"
                ]
              },
              "Action": [
                "ecr:GetDownloadUrlForLayer",
                "ecr:BatchGetImage",
                "ecr:BatchCheckLayerAvailability",
                "ecr:PutImage",
                "ecr:InitiateLayerUpload",
                "ecr:UploadLayerPart",
                "ecr:CompleteLayerUpload"
              ]
            }
          ]
        }
      }
    }
  }
}

{
  "AWSTemplateFormatVersion": "2010-09-11T00:00:00Z",
  "Resources": {
    "MyRepository6": {
      "Type": "AWS::ECR::Repository",
      "Properties": {
        "RepositoryName": "test-repository",
        "ImageScanningConfiguration": {
          "ScanOnPush": "false"
        }
      }
    }
  }
}