Finally got the root flag, used a few days to get the foothold, half-day to privesc to root, the foothold really hard compare to the privesc and the user, need tons of enumeration. The root flag is not hard but the box is pretty unstable and lag which is the difficulty instead of the actual privesc I think. However I just get the root flag, I tried to get a reverse shell with either python or bash but none of them works, python one show connection to my host which I receive in nc, however, don’t really have a shell and just stuck there, I think my reverse shell is fine because I tried with the user and it works, anyone has some hints to make the reverse shell work, please?