Security Incidents mailing list archives

Re: How to cope with, uhm, "mentally challenged" abuse personnel?


From: "Ralf G. R. Bergs" <rabe () RWTH-Aachen DE>
Date: Tue, 6 Mar 2001 12:15:22 +0100

On Sat, 03 Mar 2001 12:33:20 -0500 (EST), Travis Pugh wrote:

Hi Ralf.  I think this begs the question: is a scan reportable / worthy of
action by an upstream ISP?
[AUP:]
"Unauthorized access to or use of data, systems or networks, including any
attempt to probe, scan or test the vulnerability of a system or network or
to breach security or authentication measures without express
authorization of the owner of the system or network."

However, working at an ISP, I wonder how realistic this is.  Scans seem to
be "background noise" on the 'net as a whole, and taking action against
every one of them would be unrealistic based on the number of staff
available to deal with security.  If all of the security staff are busy
dealing with intrusions, DoS attacks, etc. I could see nobody having any
time to cope with the process of verifying and shutting down (or
warning) every source of a scan.

There is some truth in what you write, BUT distributed scans and, in
consequence, attacks are a danger to the internet as a whole. Mostly they're
being performed by cracked machines, and *this* is why admins should be
concerned and act according to my reports.

I don't want to start a legal discussion, but according to German law a
security person who has been warned that a machine in their subnet might be
cracked but doesn't take "suitable" action to investigate the incident and
possibly take the machine from the net will be held accountable in court. I
assume this is at least similar in US law, so it should be in UUnet's own
interest to take reports like mine serious.

So I'll throw a question to the list: does anyone have a good definition
of when a scan progresses past checking for unlocked doors and
becomes a concerted effort to find *and* exploit a vulnerability.  If such

Well, if it's just a "ping" sweep you probably don't have to take it as
serious as when it comes to scans for running RPC portmappers.

Thanks for your comments.


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