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== Unsafe modules ==

 * os.kill(), os.chown(), os.unlink(), ...
 * imageop: many bugs
   * [http://bugs.python.org/issue1179 [CVE-2007-4965] Integer overflow in imageop module] (2007-09 .. 2008-08)

Notes about Python Security.

Taint mode

Nicole King (cats-muvva.net) wrote a taint mode for CPython 3.0: http://www.cats-muvva.net/software/

Problems:

  • amaury: The patch is indeed huge!

  • fijall: it seems that every function that returns a PyObject must be modified

  • fijall: need to patch (...) all places that might modify anything. (All side effects)

=> ncoghlan: PyPy is still a *much* better platform for that kind of experimentation than CPython

See also the presentation: [http://us.pycon.org/common/talkdata/PyCon2007/062/PyCon_2007.pdf Securing Python: Controling the abilities of the interpreter], PyCon US 2007, Brett Cannon and Eric Wohlstadter

Python Security Response Team

Some members:

  • Brett Cannon

Email: security AT python.org

Controlling Access to Resources Within The Python Interpreter

Sandboxing

See PyPy project: [http://codespeak.net/pypy/dist/pypy/doc/sandbox.html PyPy's sandboxing features].

Unsafe modules

  • os.kill(), os.chown(), os.unlink(), ...
  • imageop: many bugs

Security (last edited 2009-09-14 09:54:15 by PaulBoddie)

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