OverTheWire: Bandit Level 14 → Level 15
The Bandit wargames are aimed at absolute beginners. It will teach the basics needed to be able to play other wargames.
Level Goal
The password for the next level can be retrieved by submitting the password of the current level to port 30000 on localhost.
Commands you may need to solve this level
ssh, telnet, nc, openssl, s_client, nmap
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> whatis ssh
ssh (1) - OpenSSH remote login client
> whatis telnet
telnet (1) - user interface to the TELNET protocol
> whatis nc
nc (1) - TCP/IP swiss army knife
> whatis openssl
openssl (1ssl) - OpenSSL command line tool
> whatis s_client
s_client (1ssl) - SSL/TLS client program
> whatis nmap
nmap (1) - Network exploration tool and security/ port scanner
Note: Not all commands are required to complete the level
Helpful Reading Material
Ports - How Web Servers Work | HowStuffWorks
Port (computer networking) - Wikipedia
Netcat (nc) Command with Examples | Linuxize
8 Netcat (nc) Command with Examples
Solution
From the question, we know that there is a service that is running on port 30,000. We can try to connect to the service using Netcat
(For the syntax of netcat and additional usage refer to the attached resources)
Note: nc is an alias for netcat and can be used interchangeably
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bandit14@bandit:~$ netcat localhost 30000
Password
Wrong! Please enter the correct current password
When we enter a random value we see that we get a message saying the password is incorrect
We know that the current level password is stored in /etc/band_pass/bandit14 we can try to provide that as a value to the service and see if we get the password for the next level
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bandit14@bandit:~$ cat /etc/bandit_pass/bandit14
4wcYUJFw0k0XLShlDzztnTBHiqxU3b3e
bandit14@bandit:~$ netcat localhost 30000
4wcYUJFw0k0XLShlDzztnTBHiqxU3b3e
Correct!
BfMYroe26WYalil77FoDi9qh59eK5xNr
We have found the password for the next level !!!
Logout of the current session and login into the next level using the bandit15 password
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> ssh bandit15@bandit.labs.overthewire.org -p 2220
This is a OverTheWire game server. More information on http://www.overthewire.org/wargames
bandit15@bandit.labs.overthewire.org's password: BfMYroe26WYalil77FoDi9qh59eK5xNr