Re: Running external module and accessing the created objects

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Date	Tue, 12 Mar 2013 07:20:07 -0400
From	Dave Angel <davea@davea.name>
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On 03/12/2013 12:05 AM, Michael Torrie wrote:
> On 03/11/2013 06:48 PM, Dave Angel wrote:
>> I hope you're just kidding.  execfile() and exec() are two of the most
>> dangerous mechanisms around.  import or __import__() would be much
>> better, as long as your user hasn't already run myapp.py as his script.
>
> It's not possible to setuid a python script, so I don't see how execfile
> or exec is any more dangerous than the user creating a shell script that
> rm -rf * things, and then running it.
>
> Bash "exec's" scripts all the time that users create and provide.  How
> is this different and what issues did you have in mind, exactly?
>

Mainly that exec and execfile are a slippery slope for a new programmer. 
  Once as they get it in their minds that this is the way to do things, 
they'll soon fall into using one of them on raw_input() data, on network 
data, and on other untrusted sources.


-- 
DaveA

Thread

Running external module and accessing the created objects  Kene Meniru <Kene.Meniru@illom.org> - 2013-03-08 22:06 -0500
  Re: Running external module and accessing the created objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-03-09 08:03 +0000
    Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-09 06:05 -0500
      Re: Running external module and accessing the created objects Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-03-09 11:34 +0000
    Re: Running external module and accessing the created objects Chris Angelico <rosuav@gmail.com> - 2013-03-09 22:47 +1100
    Re: Running external module and accessing the created objects Dave Angel <davea@davea.name> - 2013-03-09 07:02 -0500
    Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-09 10:34 -0500
      Re: Running external module and accessing the created objects Rick Johnson <rantingrickjohnson@gmail.com> - 2013-03-09 08:51 -0800
        Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-09 12:21 -0500
          Re: Running external module and accessing the created objects Rick Johnson <rantingrickjohnson@gmail.com> - 2013-03-09 10:33 -0800
    Re: Running external module and accessing the created objects Dave Angel <davea@davea.name> - 2013-03-09 11:12 -0500
    Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-09 11:56 -0500
    Re: Running external module and accessing the created objects Dave Angel <davea@davea.name> - 2013-03-09 12:20 -0500
    Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-09 12:39 -0500
    Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-09 13:18 -0500
    Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-11 19:57 -0400
      Re: Running external module and accessing the created objects Rick Johnson <rantingrickjohnson@gmail.com> - 2013-03-11 23:40 -0700
    Re: Running external module and accessing the created objects Dave Angel <davea@davea.name> - 2013-03-11 20:48 -0400
    Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-11 21:23 -0400
    Re: Running external module and accessing the created objects Kene Meniru <Kene.Meniru@illom.org> - 2013-03-11 21:58 -0400
    Re: Running external module and accessing the created objects Dave Angel <davea@davea.name> - 2013-03-11 22:16 -0400
    Re: Running external module and accessing the created objects Dave Angel <davea@davea.name> - 2013-03-11 22:11 -0400
    Re: Running external module and accessing the created objects Michael Torrie <torriem@gmail.com> - 2013-03-11 22:05 -0600
    Re: Running external module and accessing the created objects Dave Angel <davea@davea.name> - 2013-03-12 07:20 -0400
    Re: Running external module and accessing the created objects Kene Meniru <kemeniru@gmail.com> - 2013-03-12 13:38 +0000
    Re: Running external module and accessing the created objects Kene Meniru <kemeniru@gmail.com> - 2013-03-12 13:28 +0000

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