HTB: Registry 04 Apr 2020 maggick security boot2root linux HTB docker bolt CMS restic SUID   Estimated read time: 21 minutes This box is a writeup about a retired HacktheBox machine: Registry. This box is rated as a hard box. It was release on October 19 by thek. It implies a few rabbit holes, the Docker registry API, the Bolt CMS, and the SUID binary restic.