Re: thoughts on kernel security issues

[Matt Mackall]

On Wed, Jan 12, 2005 at 08:48:57PM -0800, Linus Torvalds wrote:
> 
> 
> On Wed, 12 Jan 2005, Dave Jones wrote:
> > 
> > For us thankfully, exec-shield has trapped quite a few remotely
> > exploitable holes, preventing the above.
> 
> One thing worth considering, but may be abit _too_ draconian, is a
> capability that says "can execute ELF binaries that you can write to".
> 
> Without that capability set, you can only execute binaries that you cannot
> write to, and that you cannot _get_ write permission to (ie you can't be
> the owner of them either - possibly only binaries where the owner is
> root).

We can do that now with a combination of read-only and no-exec mounts.

-- 
Mathematics is the supreme nostalgia of our time.
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