Мастерство приходит только с практикой.

Level0 is a remote format string intended to get you started with blacksun. It is a remote format string bug with you being able to see the reply, with address space randomisation enabled. You’ll need to use the direct parameter access method to analyse the stack and to manipulate it.

Once getting access to a shell, read /etc/motd for more information

Binary information

Stack smashing protection (SSP): Enabled
Postition Independent Executable (PIE): Enabled
Address space layout randomisation (ASLR): Enabled
Non-executable pages: None / disabled
Location: Connect to blacksun.overthewire.org on port 79

Alternatively, there is a debug version on port 78 if you need help understanding what you’re seeing

Included file: blacksun0.c