VAF: Very Advanced (Web) Fuzzer

In VAF there will also be a vaf_linux_amd64 binary for linux users already compiled by me, but that’s not going to be always updated

Clone and cd into the repo
Install nim

Linux: Install

nim using: curl https://nim-lang.org/choosenim/init.sh -sSf | sh and adding nim to path

Windows: Download

nim from https://nim-lang.org/install_windows.html and run finish.exe (you might need to reopen a cmd window for nim to load)

nimble build

A vaf binary file will be created in your directory ready to be used

Using VAF

Using vaf is simple, here’s the current help text:

Usage:
vaf – very advanced fuzzer [options]

Options:
-h, –help
-u, –url=URL choose url, replace area to fuzz with []
-w, –wordlist=WORDLIST choose the wordlist to use
-sc, –status=STATUS set on which status to print, set this param to ‘any’ to print on any status (default: 200)
-pr, –prefix=PREFIX prefix, e.g. set this to / for content discovery if your url doesnt have a / at the end (default: )
-sf, –suffix=SUFFIX suffix, e.g. use this for extensions if you are doing content discovery (default: )
-pd, –postdata=POSTDATA only used if ‘-m post’ is set (default: {})
-m, –method=METHOD suffix, e.g. use this for extensions if you are doing content discovery (default: get)
-pif, –printifreflexive print only if the output reflected in the page, useful for finding xss
-ue, –urlencode url encode the payloads
-pu, –printurl prints the url that has been requested

Screenshots

(with every status code printed, suffixes .php,.html and no prefixes)

(with url printed, every status code printed, suffixes .php,.html and no prefixes)

(post data fuzzing)

Examples

Fuzz post data:

vaf.exe -w example_wordlists\short.txt -u https://jsonplaceholder.typicode.com/posts -m post -sc 201 -pd “{\”title\”: \”[]\”}”

Fuzz GET URLs

vaf.exe -w example_wordlists\short.txt -u https://example.org/[] -sf .html

Tips

Add a trailing , in the suffixes or prefixes argument to try the word without any suffix/prefix like this: -pf .php, or -sf .php,
Use -pif with a bunch of xss payloads as the wordlist to find XSS
Make an issue if you want to suggest a feature

Download

R K