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Message-Id: <1497003507.21594.177.camel@linux.vnet.ibm.com>
Date: Fri, 09 Jun 2017 06:18:27 -0400
From: Mimi Zohar <zohar@...ux.vnet.ibm.com>
To: Matt Brown <matt@...tt.com>, Kees Cook <keescook@...omium.org>
Cc: James Morris <james.l.morris@...cle.com>,
"Serge E. Hallyn"
<serge@...lyn.com>,
LKML <linux-kernel@...r.kernel.org>,
linux-security-module <linux-security-module@...r.kernel.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
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.
Mimi
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