Author: Jeffery John
Description
Using a Secure Shell (SSH) is going to be pretty important.Can you ssh as ctf-player to titan.picoctf.net at port 50830 to get the flag?You’ll also need the password 84b12bae. If asked, accept the fingerprint with yes.If your device doesn’t have a shell, you can use: https://webshell.picoctf.orgIf you’re not sure what a shell is, check out our Primer: https://primer.picoctf.com/#_the_shell
Hints
- https://linux.die.net/man/1/ssh
- You can try logging in ‘as’ someone with
<user>@titan.picoctf.net - How could you specify the port?
- Remember, passwords are hidden when typed into the shell
Answer
┌──(0xneobyte㉿0xNeoShell)-[~]
└─$ ssh ctf-player@titan.picoctf.net
The authenticity of host 'titan.picoctf.net (3.139.174.234)' can't be established.
ED25519 key fingerprint is SHA256:ouhiHD6XQKuHntnkUUSngcHUBWF2ZN+NYh6D5p565nM.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'titan.picoctf.net' (ED25519) to the list of known hosts.
ctf-player@titan.picoctf.net: Permission denied (publickey).
┌──(0xneobyte㉿0xNeoShell)-[~]
└─$ ssh ctf-player@titan.picoctf.net:50830
ssh: Could not resolve hostname titan.picoctf.net:50830: Name or service not known
┌──(0xneobyte㉿0xNeoShell)-[~]
└─$ man ssh
┌──(0xneobyte㉿0xNeoShell)-[~]
└─$ ssh ctf-player@titan.picoctf.net -p 50830
The authenticity of host '[titan.picoctf.net]:50830 ([3.139.174.234]:50830)' can't be established.
ED25519 key fingerprint is SHA256:4S9EbTSSRZm32I+cdM5TyzthpQryv5kudRP9PIKT7XQ.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '[titan.picoctf.net]:50830' (ED25519) to the list of known hosts.
ctf-player@titan.picoctf.net's password:
bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
Welcome ctf-player, here's your flag: picoCTF{s3cur3_c0nn3ct10n_07a987ac}
Connection to titan.picoctf.net closed.
Welcome ctf-player, here’s your flag: picoCTF{s3cur3_c0nn3ct10n_07a987ac}