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Date: Fri, 09 Jun 2017 06:18:27 -0400
From: Mimi Zohar <>
To: Matt Brown <>, Kees Cook <>
Cc: James Morris <>,
        "Serge E. Hallyn"
        LKML <>,
        linux-security-module <>,
        "" <>
Subject: Re: [PATCH v2 1/1] Add Trusted Path Execution as a stackable LSM

On Thu, 2017-06-08 at 23:50 -0400, Matt Brown wrote:
> >>
> >> *  Issues:
> >>    *  Can be bypassed by interpreted languages such as python. You can run
> >>       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.


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