How to fix fuzzgrind errors?

[draggy]

Hello People,

I having some trouble with fuzzgrind:

root@bt:/pentest/fuzzers/fuzzgrind# ./fuzz/fuzz.py test
[+] expanding execution with file input.txt
Traceback (most recent call last):
  File "./fuzz/fuzz.py", line 404, in <module>
    search(target, worklist, [ None ] * 10)
  File "./fuzz/fuzz.py", line 301, in search
    child_inputs = expand_execution(input, callbacks)
  File "./fuzz/fuzz.py", line 190, in expand_execution
    pc = compute_path_constraint(input.filename)
  File "./fuzz/fuzz.py", line 137, in compute_path_constraint
    max_constraint=PARAM['MAX_BOUND'])
  File "/pentest/fuzzers/fuzzgrind/fuzz/valgrind.py", line 324, in run_valgrind
    p = subprocess.Popen(arg_valgrind + arg_prog, stdin=stdin, stdout=subprocess.PIPE, stderr=fp.fileno())
  File "/usr/lib/python2.5/subprocess.py", line 594, in __init__
    errread, errwrite)
  File "/usr/lib/python2.5/subprocess.py", line 1153, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Anyone mind help out?

Thank you.

[Liuser]

Read the last error line and that should give you a clue why fuzzgrind isn't working.

[draggy]

Hello People,

"/usr/lib/python2.5/subprocess.py" is available:

root@bt:/usr/lib/python2.5# ls | grep subprocess.py
subprocess.py
subprocess.pyc
subprocess.pyo

"/pentest/fuzzers/fuzzgrind/fuzz/valgrind.py" is available:

root@bt:/pentest/fuzzers/fuzzgrind/fuzz# ls | grep valgrind.py
valgrind.py
valgrind.pyc

when I tried to execute valgrind.py, it was denied:

root@bt:/pentest/fuzzers/fuzzgrind# ./fuzz/valgrind.py
bash: ./fuzz/valgrind.py: Permission denied

Looking at the "valgrind.py"

import os
import re
import select
import signal
import subprocess
import sys
from ir_stmt import *
from ir_expr import *
from ir_type import *
from x86g_calculate_condition import x86g_calculate_condition


FUZZGRIND = './valgrind-3.4.1/build/bin/valgrind'

I checked the "valgrind-3.4.1/build" directory

root@bt:/pentest/fuzzers/fuzzgrind/valgrind-3.4.1/build# ls -l
total 0

It was empty.

This mean I am required to compile valgrind-3.4.1?

Thank you

[draggy]

Hello Guys,

I tried to reinstall the fuzzgrind, it seems not working either:

oot@bt:/pentest/fuzzers/fuzzgrind# ./install.sh
[fuzzgrind] Compiling some binaries
make: Entering directory `/pentest/fuzzers/fuzzgrind/fault_detection'
make: Nothing to be done for `all'.
make: Leaving directory `/pentest/fuzzers/fuzzgrind/fault_detection'
make: Entering directory `/pentest/fuzzers/fuzzgrind/testcase'
make: Nothing to be done for `all'.
make: Leaving directory `/pentest/fuzzers/fuzzgrind/testcase'
[fuzzgrind] Installing valgrind
root@bt:/pentest/fuzzers/fuzzgrind# python -V
Python 2.5.2
root@bt:/pentest/fuzzers/fuzzgrind#

The installation process seems to cancel itself when it tried to install valgrind.....

Anyone got solution to this problem?

Thank you.