Debian 9. Proftpd and vsFTPd. Why can the user rename and delete root folders/files?

Question

Debian

Hello.
Debian 9
Proftpd and vsFTPd
For some reason, I see the same problem on both servers: I create a folder in the user directory. Owner/Group root:root. Only the owner has write permissions.
But at the same time, the user can rename and delete the directory.
Tell me, what is it connected with? Thank you.

Answer 1

Of course it can. To delete or rename an item in a directory (be it a file or a subdirectory), you need write permissions to the directory itself, i.e. in this case, to write to the user's directory

Answer 2

Make sure the servers are not running as root

Answer 3

Maybe you just need to set it up like a human being? working vsftp config