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Bandit 19 Over The Wire

Lessons Learned

some files change your euid/ effective user id, which allows you to act as another user through them.

Logging in

On a kali vm/ linux machine
Type:

ssh bandit19@bandit.labs.overthewire.org -p 2220
IueksS7Ubh8G3DCwVzrTd8rAVOwq3M5x

Completing The Challenge

The Goal:

To gain access to the next level, you should use the setuid binary in the homedirectory. Execute it without arguments to find out how to use it. The password for this level can be found in the usual place (/etc/bandit_pass), after you have used the setuid binary.

The Solution:

bandit19@bandit:~$ id
uid=11019(bandit19) gid=11019(bandit19) groups=11019(bandit19)
bandit19@bandit:~$ ./bandit20-do id
uid=11019(bandit19) gid=11019(bandit19) euid=11020(bandit20) groups=11019(bandit19) 
bandit19@bandit:~$ ./bandit20-do cat /etc/bandit_pass/bandit20
GbKksEFF4yrVs6il55v6gwY5aVje5f0j

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