really_only_echo

really_only_echo

Description

Hey, I have made a terminal that only uses echo, can you find the flag?

Difficulty

5/10

Flag

pctf{echo_is_such_a_versatile_command}

Hints

No hints

Author

Ryan Wong (ShadowBringer)

Tester

Writeup

First you need to understand how to create and execute commands with echo.

1. echo $($(echo l)$(echo s)) -> This is list the directory
2. echo $($(echo c)$(echo a)$(echo t)$(echo " ")$(echo f)$(echo l)$(echo a)$(echo g)$(echo .)$(echo t)$(echo x)$(echo t)) -> This allows the printing of the flag
3. or, echo $($(echo c)at flag.txt