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Re: Vulnerability scanning routines - what is overkill.
From: Marco Ivaldi <raptor () mediaservice net>
Date: Mon, 12 Sep 2011 17:09:28 +0200 (ora legale Europa occidentale)

On Sat, 27 Aug 2011, Duncan Alderson wrote:

Hi Cribbar,

I can see the auditors point but he may not be putting the best case forward

If the organisation has a good security model in place with patching and hardening, there is still a need to scan the whole environment. Look at it as a defence in depth scan. What happens if a rouge device is added to network? A change on a device is added that has insecure consequences?

Not to mention the fact that the best (only?) way to verify that the security model in place is indeed "good" or at least "good enough" is to perform a thorough operational security audit [1]. Otherwise you're just guessing at best.

I know there can be other controls in place to stop this happening but you cannot rely on a silver bullet product/process to secure your environment.

You will need hundreds of bullets for each threat scenario you are defending against.

Agreed. That's why the focus should be shifted from threats to operations.

[1] See the OSSTMM 3, available at www.osstmm.org.

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Marco Ivaldi                          OPSA, OPST, OWSE
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