Other hackers solved it by adding SSH keys, I had an alternate approach, read and find out ;)

[https://blog.dexter0us.com/posts/redlike-hacktivity-2021-writeup/](https://blog.dexter0us.com/posts/redlike-hacktivity-2021-writeup/)

Original writeup (https://blog.dexter0us.com/posts/redlike-hacktivity-2021-writeup/).