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Crash upon loading libc

See original GitHub issue

hi there, this is my first time using ropper, I am following the steps in exploit development training.

I installed ropper using: sudo pip install ropper -no-cache-dir I am getting the below error when I load libc in ropper:

(ropper)> file libc-2.27.so
[INFO] Load gadgets for section: LOAD
[ERROR] Please report this error on https://github.com/sashs/ropper
[ERROR] Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 62, in cmd
    func(self, text)
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 649, in do_file
    self.__loadFile(text)
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 211, in __loadFile
    self.__loadGadgets()
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 302, in __loadGadgets
    self.__searchGadgetsFor(self.currentFileName)
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 306, in __searchGadgetsFor
    self.__rs.loadGadgetsFor(binary)
  File "/usr/local/lib/python2.7/dist-packages/ropper/service.py", line 652, in loadGadgetsFor
    load_gadgets(fc)
  File "/usr/local/lib/python2.7/dist-packages/ropper/service.py", line 637, in load_gadgets
    f.allGadgets = self.__ropper.searchGadgets(f.loader, instructionCount=self.options.inst_count, gtype=gtype,multiprocessing=self.options.multiprocessing)
  File "/usr/local/lib/python2.7/dist-packages/ropper/rop.py", line 289, in searchGadgets
    if mp.get_start_method() != 'fork':
AttributeError: 'module' object has no attribute 'get_start_method'

Am I missing something? Thanks

Issue Analytics

State:
Created a year ago
Comments:8 (5 by maintainers)

Top GitHub Comments

1reaction

sashscommented, Aug 31, 2022

ropper --file <binary> --single Then the gadgets are loaded within a single process, which is much slower.

make python3 default on your system and use pip3 to install ropper

0reactions

init5-SFcommented, Aug 31, 2022

No, it breaks when I use --console

dev@ubuntu:~/Desktop/exp$ ropper --file libc-2.27.so --console
[INFO] Load gadgets for section: LOAD
Traceback (most recent call last):
  File "/usr/local/bin/ropper", line 11, in <module>
    load_entry_point('ropper==1.13.8', 'console_scripts', 'ropper')()
  File "/usr/local/lib/python2.7/dist-packages/ropper/__main__.py", line 36, in main
    ropper.start(sys.argv[1:])
  File "/usr/local/lib/python2.7/dist-packages/ropper/__init__.py", line 52, in start
    Console(app_options).start()
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 184, in start
    self.__loadFile(file)
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 211, in __loadFile
    self.__loadGadgets()
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 302, in __loadGadgets
    self.__searchGadgetsFor(self.currentFileName)
  File "/usr/local/lib/python2.7/dist-packages/ropper/console.py", line 306, in __searchGadgetsFor
    self.__rs.loadGadgetsFor(binary)
  File "/usr/local/lib/python2.7/dist-packages/ropper/service.py", line 652, in loadGadgetsFor
    load_gadgets(fc)
  File "/usr/local/lib/python2.7/dist-packages/ropper/service.py", line 637, in load_gadgets
    f.allGadgets = self.__ropper.searchGadgets(f.loader, instructionCo
![Screenshot 2022-08-31 180513](https://user-images.githubusercontent.com/10214861/187725834-14cd97e6-2142-430a-a017-b4650e136758.png)
unt=self.options.inst_count, gtype=gtype,multiprocessing=self.options.multiprocessing)
  File "/usr/local/lib/python2.7/dist-packages/ropper/rop.py", line 289, in searchGadgets
    if mp.get_start_method() != 'fork':
AttributeError: 'module' object has no attribute 'get_start_method'

but the syntax I used earlier works Screenshot 2022-08-31 180513