Tenet is a fun box where we find a backup of a staging PHP file which loads external code via deserialization, which leads to code-execution and a reverse shell. This leads to access to a script which the non-sudoer user can run to add ssh-key for getting root shell.
Ready is a fun box which is using an outdated GitLab community version. Which apparently has an exploit which gives RCE to authenticated users. This RCE gives access to docker container in which gitlab instance is running, and we have to breakout the container to escalate our privilages to get own root!