Re: request: capabilities that allow users to drop privileges further

[Chris Wright <chrisw@osdl.org>]

* Felix von Leitner (felix-kernel@fefe.de) wrote:
> Imagine being able to call "gzip -dc" in a pipe and denying it write
> access to the file system, network I/O and other harmful operations.
> If programs can restrict themselves, we could write email client
> software that uses external untrusted plugins without fear of buffer
> overflows or catching yourself a root kit.

Write some SELinux policies for the email and web server that do what
you'd like.  The LSM infrastructure allows you to control all these
things, and SELinux gives a configuration language to do this with.
Or you can write a simple module to do just what you'd like.

thanks,
-chris
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