pFuzz - Helps Us To Bypass Web Application Firewall By Using Different Methods At The Same Time

pFuzz is an advanced red teaming fuzzing tool which we developed for our research. It helps us to bypass web application firewall by using different methods at the same time.

pFuzz web uygulama araştırmaları için geliştirdiğimiz, gelişmiş bir fuzzing aracıdır. Farklı güvenlik uygulamaları üzerinde çeşitli saldırı yöntemlerinin denenmesi konusunda süreci hızlandırmak için geliştirilmiştir.

Description

pFuzz is a tool developed in the python language to have advanced fuzzing capability in web application research. Since the application has a modular structure, it has the ability to quickly add new found / to be found WAF bypassing methods to pFuzz and test it on all other WAFs. In addition to a modular structure, multi-threading, multi-processing and queue structures have been used to make the tool more flexible and the infrastructure has been created for future developments.

The tool is programmed so that a given request can be parsed and easily changed over an object. Thanks to this structure, those who will develop the application will be able to contribute easily and develop the tool in line with their own needs without changing the core structure of the application without having to learn.

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Note: If you want to contribute to the development, you can do it not only developing pFuzz but also adding new modules. Feel free to open new PR :)

Flow

**Installation and Usage **

sudo pip3 install virtualenv  
python3 -m venv myvenv  
source myvenv/bin/activate  
pip3 install -r requirements.txt  
python3 pfuzz.py --help  

Dependencies:

cffi==1.14.3  
cryptography==3.1.1  
numpy==1.19.2  
pandas==1.1.3  
pycparser==2.20  
pyOpenSSL==19.1.0  
python-dateutil==2.8.1  
pytz==2020.1  
six==1.15.0  
xlrd==1.2.0  

Usage

• Help

  python3 pfuzz.py --help

• Manipulating Headers Module

  python3 pfuzz.py -r request.txt -m

• Charfuzzing Module

  python3 pfuzz.py -r request.txt -cf

• Fuzzing Module

  python3 pfuzz.py -r request.txt -f

• Add proxy

  python3 pfuzz.py -r request.txt -f --proxy 127.0.0.1:8080

• Add a delay between requests

  python3 pfuzz.py -r request.txt -f -d 3

• Enable TLS/SSL connection

  python3 pfuzz.py -r request.txt -f -s

• Enable logging

  python3 pfuzz.py -r request.txt -f -l

• Enable payload encoding/full-encoding function

  python3 pfuzz.py -r request.txt -f -e

  python3 pfuzz.py -r request.txt -f -fe

• Set multi-threads

  python3 pfuzz.py -r request.txt -f -t 5

• Output to the terminal

  python3 pfuzz.py -r request.txt -f -o terminal

  python3 pfuzz.py -r request.txt -f -od terminal

• Output to a file

  python3 pfuzz.py -r request.txt -f -o ~/Desktop/

  python3 pfuzz.py -r request.txt -f -od ~/tmp/

**Help **

              _____                   
       _ __  |  ___|_   _  ____ ____  
      | '_ \ | |_  | | | ||_  /|_  /  
      | |_) ||  _| | |_| | / /  / /   
      | .__/ |_|    \__,_|/___|/___|  
      |_|  
   ------------------------------------  
   @EmreOvunc | @merttasci | @xsuperbug  
   ------------------------------------  
                 v0.2.4  
   ------------------------------------  
  
usage: pfuzz.py [-h] [--request REQUEST] [--proxy PROXY] [--log] [--ssl]  
                 [--threads THREADS] [--output OUTPUT] [--delay TIME]   
                 [--output-details OUTPUT] [--full-encode] [--encode]  
                 [--fuzz] [--charfuzz] [--manipulate] [--version]  
  
optional arguments:  
  --help/-h             show this help message and exit  
  --proxy/-p    PROXY   proxy [IP:PORT]  
  --log/-l              enable logging  
  --ssl/-s              enable ssl  
  --threads/-t  NUMBER  thread(s) number [default=1]  
  --version/-v          show program's version number and exit  
    
[Request Options]:    
  --request/-r  REQUEST request file  
  --delay/-d    TIME    set a delay between requests [default=0.05]  
  --encode/-e           encode space chars in uri/body  
  --full-encode/-fe     encode all chars in uri/body  
    
[Output Options]:  
  --output/-o   OUTPUT  output important info [terminal/folder name]  
  --output-details/-od OUTPUT  
                        output all details [terminal/folder name]  
                          
[Modules]:  
  --fuzz/-f             run fuzzing module  
  --charfuzz/-cf        run char fuzzing module  
  --manipulate/-m       run manipulating headers module  
  
Usage: python3 pfuzz.py -r req.txt --log -s --fuzz -d 1 --encode -o terminal --threads 2  
Usage: python3 pfuzz.py -r req.txt -f -l --proxy 127.0.0.1:8080 --output-details ~/output  

**Extras **
How to Develop a New Module

• A python file that specifies the name of the module should be created inside modules/ folder.

  • modules
    - charfuzzer.py
    - exparse.py
    - fuzzer.py
    - headeroperations.py
    - manupilatingheaders.py

• You can use the parsed object like myreq = HTTPReq.getobj()

  from reqparser import HTTPReq
  myreq = HTTPReq.getobj()

• It has many attributes derivated from HTTPReq class. You can them it inreqparser.py.

  …
  myreq.uri
  myreq.body
  myreq.http
  myreq.referer
  myreq.origin
  myreq.host
  myreq.cookie
  …

• If you want to get your payloads from the excel, you can use getpayloads methods coming from modules.exparse.

  • getpayloads(fuzzsheetName, genericcolmnName, fuzzingpayloads)

    from modules.exparse import getpayloads
    getpayloads(fuzzsheetName, genericcolmnName, fuzzingpayloads)

  • We set statics-objects like fuzzsheetName in statics.py that is under static/ folder.

Fuzzing Module in static/statics.py fuzzsheetName = ‘Fuzzing’ genericcolmnName = ‘Payload’ fuzzingpayloads = [] ">

    # Fuzzing Module in static/statics.py  
fuzzsheetName   = 'Fuzzing'  
genericcolmnName = 'Payload'  
fuzzingpayloads = []  

• Now, you can change/add/delete attributes whatever you want.

  myreq.uri = tmpuri + payload
  myreq.addheader(header, “127.0.0.1”)
  myreq.content_type = “text/html”

• To stop multi-threading, you should add #exitme# payload to the end of your payloads and setstatics.exitCall = True to check whether queue is empty or not.

  from modules.exparse import getpayloads
  for payload in fuzzingpayloads:
  if payload == ‘#exitme#’:
  statics.exitCall = True
  else:
  [OPERATIONS]

• When your object(request) is ready to be sent, you can use sendit() function to queue it.

  from reqsender import sendit
  sendit(myreq)

• If you need to change core functions in pFuzz, you can start a pull request or open an issue.

Some Important Functions to Develop New Modules

Aim	Module/Class	Function	Parameter(s)
To send a request	reqsender.py	sendit()	object
To use a request object	reqparser.py/HTTPReq	getobj()	-
To add a custom header	reqparser.py/HTTPReq	OBJECT.addheader()	newHeadername,value
To delete a header	reqparser.py/HTTPReq	OBJECT.delheader()	headerName
To change a header	reqparser.py/HTTPReq	OBJECT.changeheader()	headerName,newHeaderName
To get a payload from the file	exparse.py	getpayloads()	sheetName,columnName
To write a log info/debug/warning	waflogger.py	loginfo/logdebug/logwarn()	logMessage

What WAFs did we bypass?

• FortiWeb
• Cloudflare
• Sucuri
• Akamai
• Imperva
• F5 WAF

Download pFuzz