Exploit Exercises

exploit-exercises.com provides a variety of virtual machines, documentation and challenges that can be used to learn about a variety of computer security issues such as privilege escalation, vulnerability analysis, exploit development, debugging, reverse engineering, and general cyber security issues.

more here.......https://exploit-exercises.com/

and below is some additional security/hacking challenge links you may be interested in
http://securityoverride.org/challenges/index.php
http://smashthestack.org/wargames.html
http://overthewire.org/wargames/