Snort mailing list archives

Re: Reliability of signatures


From: Crusty Saint <saintcrusty () gmail com>
Date: Fri, 4 Feb 2011 18:12:31 +0100

Did someone ever consider an european-fork for snort ? US and EU share a lot
but i'm not sure they share IT infrastructure trust.



2011/2/4 Matthew Jonkman <jonkman () emergingthreatspro com>

I agree on the vendor being the keeper of the data. And I'd volunteer ET
for the task, but any resources we'd muster would be off the proceeds of ET
Pro sales, so we're in the same category really.

We started something like that a while ago in sidreporter, but didn't get
it far off the ground unfortunately.

If we do this in another venue we also need to do something to correlate
sids, because the ET Pro reports would be for similar vulns or issues, but
different sids. So we'd really need to either correlate (major PITA), or run
side by side separate databases.

Then there are the issues of not disclosing sensitive data in automated
reporting. I think we've done a good job there in sidreporter, but it's
still a concern for most companies.

So a few thoughts:

A joint Sourcefire-ET Pro supported database run by community members?

OISF maybe take it in as a project and volunteers run it? (could secure
gov't funding for something like that in the long term if it were in a
non-profit)

ET and SF both stand up their own? But maybe share a reporting mechanism?

I dunno. Lots of possibilities, and a lot of very good data we could
generate in a mostly automated way for signature confidence...

Thoughts?

Matt



On Feb 4, 2011, at 11:17 AM, Joel Esler wrote:

On Fri, Feb 4, 2011 at 10:51 AM, Martin Holste <mcholste () gmail com> wrote:

I like that idea too.  It'd make a lot of sense to integrate it into
snort.org - in fact there's probably a lot of data about Snort
detection performance, config options and rule quality we could put up
there.  Communication favors the defender...


Thanks, Marty.  I'm all for free resources, but that would make this
project vendor-sponsored, which makes my spider senses tingle...  I'd
feel better if a non-profit hosted, or at least a company that doesn't
sell signatures.  Otherwise, it'd be like Starbucks sponsoring a
coffee rating site.  Up-vote for Trenta!

Vendor sponsored projects are okay I think, especially since we have the
resources to donate to a project that is going to make everyone's detection
better.



I would think it would need to have some kind of automatic reporting
method,
perhaps with manual commenting?
J

What do you mean by automatic?  I'd think we'd want this to remain
manual, but as integrated into the analysis process as possible via
whatever GUI you're using.  For SF products, a button built into the
GUI, and maybe something to click on in Snorby, et al.?  And, of
course, there would need to be the manual vote page on the site.  A
basic JSON API to receive submissions would do fine on the web side.

Actually, I could probably code this up this weekend if someone
volunteers a neutral hosting space.  Will Jeff Atwood sue if we use
snortoverflow.com?



What I was thinking was having a reputation (hit) count score from gid:sid
and maybe from the IP involved, then allow people to comment on said results
manually.

Using that information could build a high or low reputation score based
upon actual results, allowing the ruleset to be better tuned and formed,
allowing reduction of false positives or false negatives.

Just thinking outloud (which is usually a bad habit)

Joel

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and provide services. The best practices for maximizing a physical server's
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----------------------------------------------------
Matthew Jonkman
Emergingthreats.net
Emerging Threats Pro
Open Information Security Foundation (OISF)
Phone 765-807-8630
Fax 312-264-0205
http://www.emergingthreatspro.com
http://www.openinfosecfoundation.org
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and provide services. The best practices for maximizing a physical server's
connectivity to a physical network are well understood - see how these
rules translate into the virtual world?
http://p.sf.net/sfu/oracle-sfdevnlfb
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and provide services. The best practices for maximizing a physical server's
connectivity to a physical network are well understood - see how these
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