HIGH
Source
Trivy
ID
AVD-AWS-0032

ECR repository policy must block public access

Allowing public access to the ECR repository risks leaking sensitive of abusable information

Impact

Follow the appropriate remediation steps below to resolve the issue.

Do not allow public access in the policy

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Resources:
  GoodExample:
    Type: AWS::ECR::Repository
    Properties:
      RepositoryName: "test-repository"
      ImageTagImmutability: IMMUTABLE
      ImageScanningConfiguration:
        ScanOnPush: false
      EncryptionConfiguration:
        EncryptionType: KMS
        KmsKey: "alias/ecr-key"
      RepositoryPolicyText: 
        Version: "2012-10-17"
        Statement: 
          - 
            Sid: AllowPushPull
            Effect: Allow
            Principal: 
              AWS: 
                - "arn:aws:iam::123456789012:user/Alice"
            Action: 
              - "ecr:GetDownloadUrlForLayer"
              - "ecr:BatchGetImage"
              - "ecr:BatchCheckLayerAvailability"
              - "ecr:PutImage"
              - "ecr:InitiateLayerUpload"
              - "ecr:UploadLayerPart"
              - "ecr:CompleteLayerUpload"

Do not allow public access in the policy

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 resource "aws_ecr_repository" "foo" {
   name = "bar"
 }
 
 resource "aws_ecr_repository_policy" "foopolicy" {
   repository = aws_ecr_repository.foo.name
 
   policy = <<EOF
 {
     "Version": "2008-10-17",
     "Statement": [
         {
             "Sid": "new policy",
             "Effect": "Allow",
             "Principal": "arn:aws:iam::${data.aws_caller_identity.current.account_id}:root",
             "Action": [
                 "ecr:GetDownloadUrlForLayer",
                 "ecr:BatchGetImage",
                 "ecr:BatchCheckLayerAvailability",
                 "ecr:PutImage",
                 "ecr:InitiateLayerUpload",
                 "ecr:UploadLayerPart",
                 "ecr:CompleteLayerUpload",
                 "ecr:DescribeRepositories",
                 "ecr:GetRepositoryPolicy",
                 "ecr:ListImages",
                 "ecr:DeleteRepository",
                 "ecr:BatchDeleteImage",
                 "ecr:SetRepositoryPolicy",
                 "ecr:DeleteRepositoryPolicy"
             ]
         }
     ]
 }
 EOF
 }