Re: Port scan causing system crashes

["MARTIN M. Bénoni" <benoni_martin () hotmail com>]

Hi!

Well, I have such problems last year as well, on old Sun boxes. The Sun were 
very loaded with many requests from clients, and the portscan we did made 
them crash down. However we were running Nmap with the option allowing us to 
initiate many connetions to many ports at the same time, and this has the 
same result than a port scan Dos.

Maybe the heavy load the boxes were supporting, and our mutiple scans added 
to that made the box to fall down.


> From: steve.x.jones () royalmail com
> To: pen-test () securityfocus com
> Subject: Port scan causing system crashes
> Date: Thu, 12 Jun 2003 11:23:06 +0000
>
>
>
> Hello
>
> Please can you help?  Has any-one else out there had issues with NMAP port 
> scans
> (or any other port scanner) causing systems to crash?
>
> I use Nessus to baseline the security of our systems and have twice had 
> problems
> caused by the NMAP port scan on clustered unix boxes running our enterprise
> applications.  NOTE - it was the initial port scan that caused the 
> problems, not
> the subsequent vulnerability assessment.
> I've done a quick Google search and found confirmation for one of the 
> systems -
> BUGTRAQ Vulnerability 3358, "IBM HACMP Port Scan Denial of Service 
> Vulnerability",
> the other was a bespoke app running on some HP UX boxes.
>
> Does any-one know of other systems that fall over with a simple port scan?
>
> Up til now I've been running port scans happily across our subnets to look 
> for
> rogue FTP, SMTP, HTTP etc, obviously I'll have to take more care now...
>
> Thanks in advance for any help.
>
> Steve
>
>
>
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