Date: Fri, 9 Jun 2017 05:55:50 -0700 From: Kees Cook <keescook@...omium.org> To: Mimi Zohar <zohar@...ux.vnet.ibm.com> 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, 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? -Kees -- Kees Cook Pixel Security
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