Web applications are widely used by businesses and individuals, but they are vulnerable to attacks from hackers. Fuzzing is a technique used to find security vulnerabilities by sending a large number of random inputs to an application and observing its response. In this article, we will discuss four tools that can be used for fuzzing: Gobuster, Ffuz, Wfuzz, and Burp Suite.

Gobuster

Gobuster is a tool that can be used to brute-force directories and files in web applications. It can be used to find hidden directories and files by guessing their names or paths. Fuzzing GET requests using Gobuster involves specifying the URL of the website and the wordlist that Gobuster will use to brute-force the directories. Fuzzing POST requests using Gobuster involves specifying the URL of the login page, the POST data, the number of threads, and the file that contains the list of usernames and passwords.

Fuzzing GET Requests using Gobuster:

gobuster dir -u https://example.com -w /path/to/wordlist.txt

Fuzzing POST Requests using Gobuster:

gobuster dir -u https://example.com/login -c ‘username=^USER^&password=^PASS^’ -t 50 -w /path/to/payload.txt

Ffuz

Ffuz is a command-line tool that can be used to fuzz web applications. It can be used to test various inputs such as URL parameters, headers, and cookies. Fuzzing GET requests using Ffuz involves specifying the URL of the website and the wordlist that Ffuz will use to generate random inputs. Fuzzing POST requests using Ffuz involves specifying the request method, the header, the POST data, the file that contains the list of usernames and passwords, and the URL of the login page.

Fuzzing GET Requests using Ffuz:

ffuf -u "https://example.com/search?q=FUZZ" -w /path/to/wordlist.txt

Fuzzing POST Requests using Ffuz:

ffuf -X POST -H "Content-Type: application/x-www-form-urlencoded" -d "username=FUZZ&password=FUZZ" -w /path/to/payloads.txt -u https://example.com/login

Wfuzz

Wfuzz is another command-line tool that can be used to fuzz web applications. It is designed to test the POST requests in web applications. Fuzzing GET requests using Wfuzz involves specifying the payload file that contains the search terms and the placeholder that will be replaced with the search terms. Fuzzing POST requests using Wfuzz involves specifying the wordlist that Wfuzz will use to generate random inputs for the “username” parameter, and the data that will be sent in the POST request.

Fuzzing GET Requests using Wfuzz:

wfuzz -c -z file,/path/to/payloads.txt https://example.com/search.php?search=FUZZ

Fuzzing post Requests using Wfuzz:

wfuzz -c -z file,payloads.txt --data "username=FUZZ&password=FUZZ1" https://example.com/login.php

Burp Suite

Burp Suite is a comprehensive web application security tool that can be used for fuzzing, among other things. It includes features such as proxying, scanning, and spidering, making it a powerful tool for web application security testing.

In conclusion, these tools are useful for web application security testing through fuzzing. Each tool has its unique features and usage. Businesses and individuals should consider using one or more of these tools to improve the security of their web applications.