AWS Certified Security – Specialty — Question 362

A company is running internal microservices on Amazon Elastic Container Service (Amazon ECS) with the Amazon EC2 launch type. The company is using Amazon Elastic Container Registry (Amazon ECR) private repositories.

A security engineer needs to encrypt the private repositories by using AWS Key Management Service (AWS KMS). The security engineer also needs to analyze the container images for any common vulnerabilities and exposures (CVEs).

Which solution will meet these requirements?

Answer options

• A. Enable KMS encryption on the existing ECR repositories. Install Amazon Inspector Agent from the ECS container instances’ user data. Run an assessment with the CVE rules.
• B. Recreate the ECR repositories with KMS encryption and ECR scanning enabled. Analyze the scan report after the next push of images.
• C. Recreate the ECR repositories with KMS encryption and ECR scanning enabled. Install AWS Systems Manager Agent on the ECS container instances. Run an inventory report.
• D. Enable KMS encryption on the existing ECR repositories. Use AWS Trusted Advisor to check the ECS container instances and to verily the findings against a list of current CVEs.

Correct answer: B

Explanation

AWS KMS encryption cannot be enabled on existing Amazon ECR repositories; they must be recreated with KMS encryption enabled at creation. Additionally, ECR native scanning automatically scans container images for CVEs upon image push, making the recreation of repositories with scanning enabled the correct approach. Installing agents on the underlying ECS instances or using Trusted Advisor does not scan the container images stored in ECR for vulnerabilities.