This book offers hands-on exercises (via Virtual Machine) and technical information to uncover and fix vulnerabilities caused by misconfiguration or specific corner cases in U-Boot deployments. It includes an introduction to the bootloaders in Embedded Systems and several real-world attacks along with recommendations.

The book is available on all the amazon marketplaces, below are just 3 links:

I have completed hundreds of projects involving reverse engineering, code review, embedded systems, and software penetration testing. I apply these skills to work in the automotive, smart grid, SATCOM, and other industries. I have also presented a considerable amount of original cybersecurity research at major conferences