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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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