Re: [PATCH v2 1/1] Add Trusted Path Execution as a stackable LSM

From: Mimi Zohar
Date: Fri Jun 09 2017 - 06:19:01 EST


On Thu, 2017-06-08 at 23:50 -0400, Matt Brown wrote:
> >>
> >> *Â Issues:
> >>ÂÂÂ *Â Can be bypassed by interpreted languages such as python. You can run
> >>ÂÂÂÂÂÂ malicious code by doing: python -c 'evil code'
> >
> > What's the recommendation for people interested in using TPE but
> > having interpreters installed?
> >
>
> If you don't need a given interpreter installed, uninstall it. While
> this is common sense system hardening it especially would make a
> difference under the TPE threat model.
>
> I don't have a knock down answer for this. Interpreters are a hard
> problem for TPE.

You might be interested in the minor LSM named "shebang", that I
posted as a proof of concept back in January, which restricts the
python interactive prompt/interpreter, but allows the scripts
themselves to be executed.

Mimi