ECR Repository Is Publicly Accessible

• Query id: e86e26fc-489e-44f0-9bcd-97305e4ba69a
• Query name: ECR Repository Is Publicly Accessible
• Platform: Terraform
• Severity: Critical
• Category: Access Control
• URL: Github

Description

Amazon ECR image repositories shouldn't have public access
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - tf file

resource "aws_ecr_repository" "positive1" {
  name = "bar"
}

resource "aws_ecr_repository_policy" "positive2" {
  repository = aws_ecr_repository.foo.name

  policy = <<EOF
{
    "Version": "2008-10-17",
    "Statement": [
        {
            "Sid": "new policy",
            "Effect": "Allow",
            "Principal": "*",
            "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
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

resource "aws_ecr_repository" "negative1" {
  name = "bar"
}

resource "aws_ecr_repository_policy" "negative2" {
  repository = aws_ecr_repository.foo.name

  policy = <<EOF
{
    "Version": "2008-10-17",
    "Statement": [
        {
            "Sid": "new policy",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::##account_number##: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
}