> For the complete documentation index, see [llms.txt](https://0xss0rz.gitbook.io/0xss0rz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://0xss0rz.gitbook.io/0xss0rz/pentest/web-attacks/fuzzing.md). # Fuzzing [![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/Y8Y41FQ2GA) {% content-ref url="/pages/84s50BsU8rzC71IR1RY8" %} [Web Enumeration](/0xss0rz/pentest/web-attacks/web-enumeration.md) {% endcontent-ref %} {% embed url="" %} {% hint style="success" %} *Try `/usr/share/wordlists/seclists/Discovery/Web-Content/quickhits.txt` first* {% endhint %} {% hint style="info" %} *Need to fuzz with user agent becaus they block ffuf UA `ffuf -u https://test/.com/FUZZ -w wordlist .txt -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)"`* {% endhint %} {% hint style="warning" %} *When running content discovery scans, try to also change your request method (for example, from `GET` to `POST` or `PUT`)! Some API endpoints or app routes are only programmed to return a valid response when a specific HTTP method is sent in the request!* {% endhint %} ## Wordlists {% embed url="" %} {% embed url="" %} {% embed url="" %} ## Ffuf {% embed url="" %} ## Burp - Copy as FFUF Command {% embed url="" %} * Modify the request - place the "FUZZ" keyword in the request * Right-click and choose the "Copy as FFUF Command" from Context Menu * The command is copied to your clipboard to be used in other tools ## Directory Fuzzing ```shell-session ffuf -w /usr/share/wordlists/seclists/Discovery/Web-Content/directory-list-2.3-small.txt:FUZZ -u http://SERVER_IP:PORT/FUZZ ``` ## Page Fuzzing ### Extension Fuzzing ```shell-session ffuf -w /usr/share/wordlists/seclists/Discovery/Web-Content/web-extensions.txt:FUZZ -u http://SERVER_IP:PORT/blog/indexFUZZ ``` ### Pages {% hint style="success" %} If a path with .git/ = 403, then /.git/config might be 200! {% endhint %} ```shell-session ffuf -w /opt/useful/SecLists/Discovery/Web-Content/directory-list-2.3-small.txt:FUZZ -u http://SERVER_IP:PORT/blog/FUZZ.php ``` ### Fuzz for specific exetensions For example, php files ``` gobuster dir -w /usr/share/seclists/Discovery/Web-Content/big.txt -u http://10.10.235.70/dev/ -x php -k ``` ## Recursive Fuzzing ```shell-session ffuf -w /usr/share/wordlists/seclists/Discovery/Web-Content/directory-list-2.3-small.txt:FUZZ -u http://SERVER_IP:PORT/FUZZ -recursion -recursion-depth 1 -e .php -v ``` ## Sub-domain Fuzzing ```shell-session ffuf -w /usr/share/wordlists/seclists/Discovery/DNS/subdomains-top1million-5000.txt:FUZZ -u http://FUZZ.academy.htb/ ``` ## Virtual Host ```shell-session ffuf -w /usr/share/wordlists/seclists/Discovery/DNS/subdomains-top1million-5000.txt:FUZZ -u http://academy.htb:PORT/ -H 'Host: FUZZ.academy.htb' ``` ``` # -fs : Filter by size ffuf -w /opt/useful/SecLists/Discovery/DNS/subdomains-top1million-5000.txt:FUZZ -u http://academy.htb:PORT/ -H 'Host: FUZZ.academy.htb' -fs 900 ``` ## Parameter Fuzzing GET ``` ffuf -w /usr/share/wordlists/seclists/Discovery/Web-Content/burp-parameter-names.txt:FUZZ -u 'http://admin.academy.htb:50855/admin/admin.php?FUZZ=key' -fs xxx ``` POST ```shell-session ffuf -w /usr/share/wordlists/seclists/Discovery/Web-Content/burp-parameter-names.txt:FUZZ -u http://admin.academy.htb:PORT/admin/admin.php -X POST -d 'FUZZ=key' -H 'Content-Type: application/x-www-form-urlencoded' -fs xxx ``` ```shell-session curl http://admin.academy.htb:PORT/admin/admin.php -X POST -d 'id=key' -H 'Content-Type: application/x-www-form-urlencoded'

Invalid id!

<...SNIP...> ``` ## Value Fuzzing ```shell-session for i in $(seq 1 1000); do echo $i >> ids.txt; done ``` ```shell-session ffuf -w ids.txt:FUZZ -u http://admin.academy.htb:PORT/admin/admin.php -X POST -d 'id=FUZZ' -H 'Content-Type: application/x-www-form-urlencoded' -fs xxx ``` ## Black Box Fuzzer {% embed url="" %} ``` firefly -u 'http://target.com/?query=FUZZ' --timeout 7000 ``` ## XSS, LFI, SQLi URL Fuzzing {% embed url="" %} {% embed url="" %} ## [Earn Free Crypto / BTC with Cointiply](https://cointiply.com/r/pkZxp) [**Play Games Earn Cash Rewards**](https://cointiply.com/r/pkZxp)
## Interesting Books {% content-ref url="/pages/VVT5FQq9z62bWoNAWCUS" %} [Interesting Books](/0xss0rz/interesting-books.md) {% endcontent-ref %} {% hint style="info" %} **Disclaimer**: As an Amazon Associate, I earn from qualifying purchases. This helps support this GitBook project at no extra cost to you. {% endhint %} * [**The Web Application Hacker’s Handbook**](https://www.amazon.fr/dp/1118026470?tag=0xss0rz-21) The go-to manual for web app pentesters. Covers XSS, SQLi, logic flaws, and more * [**Bug Bounty Bootcamp: The Guide to Finding and Reporting Web Vulnerabilities**](https://www.amazon.fr/dp/1718501544?tag=0xss0rz-21) Learn how to perform reconnaissance on a target, how to identify vulnerabilities, and how to exploit them * [**Real-World Bug Hunting: A Field Guide to Web Hacking**](https://www.amazon.fr/dp/1593278616?tag=0xss0rz-21) Learn about the most common types of bugs like cross-site scripting, insecure direct object references, and server-side request forgery. ## Support this Gitbook I hope it helps you as much as it has helped me. If you can support me in any way, I would deeply appreciate it. [![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/Y8Y41FQ2GA) [![buymeacoffee](https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png)](https://buymeacoffee.com/0xss0rz) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://0xss0rz.gitbook.io/0xss0rz/pentest/web-attacks/fuzzing.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.