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Thread: How to use fuzzgrind?

  1. #1
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    Question How to use fuzzgrind?

    Hello People,

    I just reinstalled the fuzzgrind on my bracktrack.

    When I execute ./fuzz/fuzz.py test6 it just say:

    Code:
    [+] expanding execution with file input2.txt
        * 0 path constraints (bound: 0)
    [+] checking each new input
    [+] scoring each new input
    which it do not provide any result.

    Moreover, the GUI interactive always hang when I press on the "play" or execute button.

    Anyone got any tutorial on how to use fuzzgrind?

    Thank you.

  2. #2
    Super Moderator Archangel-Amael's Avatar
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    Default Re: How to use fuzzgrind?

    Don't know why you would reinstall it, but see also the readme file.
    root@dorkness:/pentest/fuzzers/fuzzgrind# cat README
    Also check into fuzzing in general as the basics are the same.
    Or the authors website contains slides and a paper ( in French) on the tool.

  3. #3
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    Default Re: How to use fuzzgrind?

    Quote Originally Posted by Archangel-Amael View Post
    Don't know why you would reinstall it, but see also the readme file.
    root@dorkness:/pentest/fuzzers/fuzzgrind# cat README
    Also check into fuzzing in general as the basics are the same.
    Or the authors website contains slides and a paper ( in French) on the tool.
    Hello Moderator,

    Referring to my previous post:

    http://www.backtrack-linux.org/forum...ight=fuzzgrind

    I have tested both the VMware and Live DVD version of Backtrack 4, it seems both versions fuzzgrind having the same problem.

    Here is the README file:

    Code:
    =========
      FUZZGRIND
      =========
    
    
      Requirements
      ------------
    
      - bzip2
      - autoconf
      - make
      - gcc
      - python
    
    
      Installation
      ------------
    
      $ ./install.sh
    
    
      Configuration
      -------------
    
      Configuration file: fuzz/settings.cfg
    
    
      Execution
      ---------
    
      CLI: $ ./fuzz/fuzz.py
      GUI: $ ./fuzz/gui.py
    
    
      Example
      -------
    
      $ ./fuzz/fuzz.py test6
      
      New input are created in testcase/input/
      Crash files are be saved in testcase/crash/
    
    
      Contact
      -------
    
      gabriel [at] security-labs [dot] org
    In fact, I did the same thing as the fuzzgrind's README file, however it gave me no result in return:

    Code:
    root@bt:/opt/fuzzgrind# pwd
    /opt/fuzzgrind
    root@bt:/opt/fuzzgrind# ./fuzz/fuzz.py test6
    [+] expanding execution with file input2.txt
        * 0 path constraints (bound: 0)
    [+] checking each new input
    [+] scoring each new input
    root@bt:/opt/fuzzgrind# ls -l ./testcase/input
    total 0
    root@bt:/opt/fuzzgrind# ls -l ./testcase/crash/
    total 0
    root@bt:/opt/fuzzgrind#
    As for the paper and slides maybe someone can translate the paper from French to English.

    On top of that, anyone know how to use fuzzgrind?

    Thank you.

  4. #4
    Just burned his ISO
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    Default Re: How to use fuzzgrind?

    Hey guys.
    I met the same problem with you. I do not know how to fix it either.
    The output is:
    [+] expanding execution with file input2.txt
    * 0 path constraints (bound: 0)
    [+] checking each new input
    [+] scoring each new input

    I think there is something wrong in function run_valgrind() which is invoked by compute_path_constraint(). The latter function returns pc, however, then length of pc is zero which leds to exit.
    Anybody who knows why? HELP!
    I am a fresher to use Fuzzgrind. Anyone wants to discuss it is welcome. You can contact me by email: chenting19870201@163.com

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