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Subject: Re: SNARE and Ptrace?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Robert L. Harris" <Robert.L.Harris@rdlg.net>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Mon, 2003-03-24 at 22:20, Robert L. Harris wrote:
> Has anyone tested to see if "Snare" from intersectalliance.com can
> detect someone executing a ptrace attack?  An old company I used to work
> for has a number of production kernels out and can't just upgrade them
> all over night so they need a good detection method and short-term fix
> if possible.  In the past we had evaluated Snare which I pointed him to
> but we're not sure if/how it might detect such an attack.

Snare won't really help you. In fact older snare tends to make a box
less secure. The rework looked good but I've not had time to do a
detailed review and I believe they've been busy working on other
projects too.

If there is no UML or debugging done on the box, stick "return -EPERM"
at the start of sys_ptrace and just disable the entire debug/strace
feature set.


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