[8992] in bugtraq
Re: Fw:"NERP" DoS attack possible in Oracle
daemon@ATHENA.MIT.EDU (Jason Ackley)
Fri Jan 8 13:35:57 1999
Date: Thu, 7 Jan 1999 17:31:13 -0800
Reply-To: Jason Ackley <jason@ACKLEY.NET>
From: Jason Ackley <jason@ACKLEY.NET>
X-To: Paul Schenk <paul.r.schenk@AC.COM>
To: BUGTRAQ@NETSPACE.ORG
In-Reply-To: <862566F1.00708700.00@amrhm1101.ac.com>
On Wed, 6 Jan 1999, Paul Schenk wrote:
> In fact, on HP-UX 10.20, Oracle 7.3.3, in listener.log you get:
>
> 06-JAN-99 16:15:45 * 12569
> TNS-12569: TNS:packet checksum failure
>
> And tnslistner continues happily along at ~0 CPU usage, it even accepts and
> processes new connections fine.
>
> So its either an Oracle 8/NT thing or a misconfiguration
>
I sent this to Aleph1, but I guess he was busy, in regards to OS
combinations:
---
From: bruce_redmon@sra.com
I tested this on Sequent Dynix and sure enough it runs the process out of
control. If it happens on this platform I suspect this can happen on any
platform.
---
From: bcf@jwfc.acom.mil
confirmed on Oracle 8.0.3 on Solaris 2.6 port 1521
confirmed on Oracle 8.0.5 on Solaris 2.6 port 1526
---
From: giblin <giblin@fibre.com>
Hello,
I gave it a try on a Solaris 2.6 ( heavily patched ) and Oracle 8.0.4
Database CPU utilization climbed and hovered at a high 49.9x% and didn't
fall below 49.7x%. This is on a UE450 with 2 processors and 1.5GB RAM.
Oracle required a restart to get it back into previous working
condition. Hmmm... Nice :)
---
From: Adam vonNieda <adam@vonnieda.org>
I've tried the bug on my Linux box, (8.0.5), and it pegged instantly.
I then tried it on one of my IBM SP (8 way) nodes running AIX 4.3 and
Oracle 8.0.4.2.1, and essentially lost the processor that the listener
is attached to instantly. So, it won't totally dog an SMP machine, but I
wouldn't expect much response from the listener! Thanks for the info.
---
From: gabriel magee <gmagee@nmia.com>
I just tried it on NT SP3 (+hotfixes) Oracle 8.0.5.0.0 Production on a
PII/350 with the same results. 100% CPU until you kill the listener.
Could maybe choose a different protocol adapter in the meantime, too...
---
Many thanks to everyone that sent in reports! We still seem to be missing
information for SGI/IRIX, any takers?
cheers,
--
Jason Ackley jason@ackley.net
