Bootleak

The server got a unknown ports which were used to access the web server which are FTP-30321, SSH-30322 and HTTP-30880. This shows that the server is reachable can be exploited through those ports.

After gaining a shell, you review which programs you can run with elevated privileges. Some trusted utilities become dangerous when they are allowed to execute as another user, even if they seem harmless at first glance.

First question you should always whisper to a new shell: “what am I allowed to do that I shouldn’t be?” There’s one command, in particular, that answers that question for you in a single line. Run it.