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Date: Mon, 7 Sep 2020 07:54:00 +1200
From: Amos Jeffries <>
Subject: Re: Open Source Tool | vPrioritization | Risk
 Prioritization Framework

On 6/09/20 7:48 pm, Pramod Rana wrote:
> Appreciate your comments.
> My two cents - Patch everything is far from reality to most (read all)
> organizations and I would argue that it's not a solution per se. To me it
> looks like buying every type of vehicle for commuting in every city of the
> world but we don't do that, rather we decide what will work best depending
> on factors like traffic, distance, roads, weather etc.

My experience with corporate systems is more like they hire a vehicle on
lease. Insisting that it be the oldest most run-down and error-prone
model the lease company has to offer. Then complaining about downtime
costs of fixing problems when things to wrong.

As a software maintainer myself I have actually had a corporate client
try to get me to backport several *thousand* patches. The plan being to
port every single bug fix and feature change from version N to version N-2.
 Installing the new version with a patch changing the version number to
N-2 would have been identical binary result.

> I believe prioritization is an integral part of everything we do and it
> works as reasoning to what we do (or don't).

Imagine that your network is facing a highly organized prepared attacker
who has done their research and knows your network structure. How fast
can you apply every patch and security update you put off for later?

The point of the counter argument is that *not* doing anything is bad.
Possibly really, really bad. So don't bother wasting time on figuring
out priority/severity per-patch. Just work through the list of things
needing patching each day as fast stability testing allows.

 Don't forget to report to appropriate management any resourcing lack or
process limitations that prevent each days patching list being finished
completely/easily. Those limitations are likely the worst security
problems you have - they are forcing security holes to remain open.

When the systemic limits are gone you should only need to prioritize
*which* things to patch based on each ones importance to your
organization. Not any rating associated to the flaw itself.


> On Sat, Sep 5, 2020 at 3:17 PM Perry E. Metzger wrote:
>> [Perhaps somewhat off topic, but the original announcement felt a bit
>> tangental as well.]
>> On Thu, 3 Sep 2020 20:13:34 +0530 Pramod Rana <>
>> wrote:
>>> It is no secret that today we have more vulnerabilities than we can
>>> assess and remediate, timely and comprehensively. Risk
>>> prioritization is a key component for any vulnerability management
>>> program.
>> I'm not sure I agree with this premise.
>> 1. It is entirely feasible to keep even a very large organization
>> comprehensively patched. There are organizations that do that.
>> 2. It is not feasible to calculate a probability of exploitation of a
>> given vulnerability, and it is not feasible to determine how bad the
>> damage from exploitation will be. This is a classic example of "tail
>> risk" where probability distributions are simply not calculable by
>> normal methods.
>> I keep hearing people in the security industry speak about scientific
>> risk assessment as though it were possible. I don't think it's
>> possible, and it seems cheaper to simply patch than to do some sort
>> of scientific assessment and prioritization of patches.
>> My gut reaction is that the growth of this idea is attributable
>> to the large number of large, well-funded organizations that are
>> none the less not capable of properly maintaining their own
>> infrastructure and thus not capable of patching in a timely manner.
>> (I have consulted to many such organizations.)
>> The notion that some sort of "risk analytics" could therefore justify
>> failing to patch quickly and give a rationale for maintaining an
>> incapable systems management team is thus attractive. However, the
>> real solution is simply to patch; a capable systems management team is
>> better than the illusion of a risk calculation system, and provides
>> far more benefits than simply maintaining infrastructure in a fully
>> patched state.
>> Perry
>> --
>> Perry E. Metzger      

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