full-disclosure - Re: DNS and Checkpoint

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Date: Thu, 10 Jul 2008 01:35:09 +0000
From: Ray P <sixsigma98@...mail.com>
To: imipak <imipak@...il.com>, Full Disclosure
	<full-disclosure@...ts.grok.org.uk>
Subject: Re: DNS and Checkpoint


The article you're looking at is for their SmartDefense product, an add-in to Firewall-1. Supposedly it will protect a DNS server behind the firewall from this vulnerability.

Ray

> Date: Wed, 9 Jul 2008 15:00:39 +0100
> From: imipak@...il.com
> To: full-disclosure@...ts.grok.org.uk
> Subject: [Full-disclosure] DNS and Checkpoint
> 
> Hello everyone,
> 
> I've had a report from someone with clue (and tcpdump) that a properly
> functioning DNS resolver that correctly uses randomised source ports
> magically becomes vulnerable once the traffic's passed through a
> Checkpoint firewall, where Dan Kaminsky's tool shows:
> 
>     x.y.z.155:56978 TXID=712
>     x.y.z.155:56979 TXID=45713
>     x.y.z.155:56980 TXID=63532
>     x.y.z.155:56981 TXID=7243
>     x.y.z.155:56982 TXID=17620
> 
> (note the incrementing port numbers.)
> 
> Can anyone else confirm this behaviour?
> 
> Checkpoint are one of the dozens of vendors listed on the CERT
> advisory as "Status: Unknown"
> http://www.kb.cert.org/vuls/id/MIMG-7ECL6B
> 
> They do have an advisory up:
>     http://www.checkpoint.com/defense/advisories/public/2008/cpai-01-Jul.html
> 
> I don't have the login needed to read the whole thing, but the front
> page just says:
> 
> "Protection provided by:
>  	 VPN-1:    * NGX R65
>                        * NGX R62
>                        * NGX R61
>                        * NGX R60
>         [...etc, etc...] "
> 
> 
> cheers
> 
> =i
> 
> _______________________________________________
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Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/