Topic created on: February 18, 2011 02:19 CST by 0xvoila .

hello guys ..

i m using pydbg to catch access violation ..

so code snippet of my access handler is ..



def access_handler_vio(self , pydbg):



    if pydbg.dbg.u.Exception.dwFirstChance:
      
        return DBG_EXCEPTION_NOT_HANDLED

#access Handler start Working ...
    self.access_handler = True

    
    print "[*][*] Woot! Handling an access violation!\n"
    crash_bin = utils.crash_binning.crash_binning()
    crash_bin.record_crash(pydbg)
    self.crash = crash_bin.crash_synopsis()
       .
       .
       .
       .
     return DBG_EXCEPTION_NOT_HANDLED




when exception appears .. then i got this error ...

    return self.callbacks[EXCEPTION_ACCESS_VIOLATION](self)
  File "fuzzer.py", line 297, in access_handler_vio
    crash_bin.record_crash(pydbg)
  File "c:\python27\utils\crash_binning.py", line 79, in record_crash
    crash.disasm              = pydbg.disasm(crash.exception_address)
  File "c:\python27\pydbg\pydbg.py", line 719, in disasm
    return "Unable to disassemble at %08x" % address
TypeError: %x format: a number is required, not NoneType



any help :)
thanks in advance