[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 [off-list ref] wrote:

quoted

On Thu, 2017-06-08 at 23:50 -0400, Matt Brown wrote:

quoted

quoted

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*  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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