# AWS - ECR Unauthenticated Enum
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## ECR
For more information check:
{% content-ref url="../aws-services/aws-ecr-enum.md" %}
[aws-ecr-enum.md](../aws-services/aws-ecr-enum.md)
{% endcontent-ref %}
### Public registry repositories (images)
As mentioned in the ECS Enum section, a public registry is **accessible by anyone** uses the format **`public.ecr.aws//`**. If a public repository URL is located by an attacker he could **download the image and search for sensitive information** in the metadata and content of the image.
{% code overflow="wrap" %}
```bash
aws ecr describe-repositories --query 'repositories[?repositoryUriPublic == `true`].repositoryName' --output text
```
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This could also happen in **private registries** where a registry policy or a repository policy is **granting access for example to `"AWS": "*"`**. Anyone with an AWS account could access that repo.
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### Enumerate Private Repo
The tools [**skopeo**](https://github.com/containers/skopeo) and [**crane**](https://github.com/google/go-containerregistry/blob/main/cmd/crane/doc/crane.md) can be used to list accessible repositories inside a private registry.
```bash
# Get image names
skopeo list-tags docker:// | grep -oP '(?<=^Name: ).+'
crane ls | sed 's/ .*//'
```
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{% endhint %}