Final answer:
The AWS service that fits the described requirements for vulnerability scanning in EC2 instances and Amazon ECR is AWS Inspector.
Step-by-step explanation:
The AWS service that meets the requirements for managing vulnerability scans in Amazon EC2 instances and container images stored in Amazon Elastic Container Registry (Amazon ECR) is the AWS Inspector. AWS Inspector is an automated security assessment service that helps improve the security and compliance of applications deployed on AWS. It automatically assesses applications for vulnerabilities or deviations from best practices, including EC2 instances and Docker container-based applications.
Once AWS Inspector is set up, it automatically discovers all the EC2 instances and container images stored in ECR. It then performs security assessments to identify potential software vulnerabilities. It categorizes the findings based on the severity of the issues it uncovers, guiding you to prioritize which issues to handle first.
This service integrates well with Amazon's ecosystem, providing detailed reports that enable actionable insights. Moreover, it helps you assess the compliance of your EC2 instances and containers against predefined security guidelines, offering a comprehensive solution for vulnerability management within AWS environments.