Great Circle Associates Firewalls
(February 1996)
 

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Subject: Re: anybody know of any vulnerabilities with "echo"
From: "Joe Smith (Really!)" <joey @ gxl . woodtech . com>
Date: Sat, 10 Feb 1996 00:27:25 -0600 (CST)
To: Greg Woods <woods @ ncar . ucar . edu>
Cc: Michael Baumann <baumann @ proton . llumc . edu>, jason @ OiT . co . uk, brian @ ilinx . bctel . net, brian_murrell @ bctel . net, firewalls @ GreatCircle . COM
In-reply-to: <199602090250 . TAA08588 @ ncar . ucar . EDU>

What is the loss of disabling echo? Or discard for that matter.

On Thu, 8 Feb 1996, Greg Woods wrote:

> On Thu, 8 Feb 1996, Jason L. Haar wrote:
> > 
> > 
> >I'm wondering if a new vulnerablity with the (a particular implementation
> > maybe) echo server has been found.  Anybody else notice this trend??
> 
> There's a CERT advisory out; forged packets that appear to come from the
> echo port of one host are sent to the echo port of another, causing the
> echo servers to bombard one another. This will hose both machines
> and the net between them, a very effective denial of service attack.
> 
> --Greg
> 


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