Date: Fri, 09 Jun 2017 09:16:32 -0400 From: Mimi Zohar <zohar@...ux.vnet.ibm.com> To: Kees Cook <keescook@...omium.org> Cc: Matt Brown <matt@...tt.com>, 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 Fri, 2017-06-09 at 05:55 -0700, Kees Cook wrote: > On Fri, Jun 9, 2017 at 3:18 AM, Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote: > > 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. > > https://patchwork.kernel.org/patch/9547405/ > > Maybe these could be merged and the interpreter string could be made > into a configurable list? I updated shebang, but didn't bother to post it, as nobody seemed to be interested at the time. The updated version already has support for the configurable list. Re-posting ... Mimi
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