Integrating Amazon ECR as a remote cache for AWS CodeBuild can significantly reduce Docker image build times by providing a reliable long-term storage solution for build caches. This method allows for the reuse of cached layers across builds, enhancing efficiency in the development process. The article outlines the implementation steps and prerequisites for setting up this caching mechanism.

Attackers can exploit AWS CodeBuild to gain long-term access to compromised accounts by configuring it as a GitHub Actions runner and backdooring an IAM role. This process allows them to persistently execute commands in the AWS environment, even after the original credentials are revoked. Defenders must monitor CloudTrail logs and audit IAM trust relationships to detect such abuses.