Full Disclosure: Re: DNS and Checkpoint

["Rodrigo Rubira Branco (BSDaemon)" <rodrigo () kernelhacking com>]

Hello,

SmartDefense includes protection for this attack since 2005 scrambling the
source port and query ID of each DNS request (just activate the DNS spoofing
protection in SD).


cya,


Rodrigo (BSDaemon).

--
http://www.kernelhacking.com/rodrigo

Kernel Hacking: If i really know, i can hack

GPG KeyID: 1FCEDEA1


--------- Mensagem Original --------
De: imipak <imipak () gmail com>
Para: Full Disclosure <full-disclosure () lists grok org uk>
Assunto: [Full-disclosure] DNS and Checkpoint
Data: 09/07/08 10:52

> 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 &quot;Status: Unknown&quot;
> 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:
>
> &quot;Protection provided by:
>        VPN-1:    * NGX R65
>                        * NGX R62
>                        * NGX R61
>                        * NGX R60
>         [...etc, etc...] &quot;
>
>
> cheers
>
> =i
>
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_______________________________________________
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