DNS poisoning at Google?

Sadiq Saif sadiq at asininetech.com
Tue Jun 26 23:33:24 CDT 2012


couchtarts.com seems to be hosted on a IP belonging to AS32244 (Liquid Web).

On Wed, Jun 27, 2012 at 12:28 AM, Matthew Black <Matthew.Black at csulb.edu> wrote:
> Running Apache on three Solaris servers behind a load balancer.
>
> I forgot how to lookup our AS number to see if it matches couchtarts.
>
> matthew black
> information technology services
> california state university, long beach
>
>
> -----Original Message-----
> From: David Hubbard [mailto:dhubbard at dino.hostasaurus.com]
> Sent: Tuesday, June 26, 2012 9:14 PM
> To: nanog at nanog.org
> Subject: RE: DNS poisoning at Google?
>
> Typically if google were pulling your site sometimes from the wrong IP, their safe browsing page should indicate it being on another AS number in addition to the correct one 2152:
>
> http://safebrowsing.clients.google.com/safebrowsing/diagnostic?site=http
> ://www.csulb.edu
>
> For example, the couchtarts site they claim yours is redirecting to:
>
> http://safebrowsing.clients.google.com/safebrowsing/diagnostic?site=http
> ://www.couchtarts.com
>
> That site's DNS is screwed up and some requests are sent to a different IP at a different host, so Google picked up both AS numbers.
>
> Could one of your domain's subdomains be what is actually infected?  You seem to have a bunch of them, maybe google is penalizing the whole domain over a subdomain?  Not sure if they do that or not.
>
> If your sites are running off of an application like wordpress, etc., you may not get the same page that google gets and the application may have been hacked.
> Here's a wget command you can use to make requests to your site pretending to be google:
>
> wget -c \
> --user-agent="Mozilla/5.0 (compatible; Googlebot/2.1;
> +http://www.google.com/bot.html)" \
> --output-document=googlebot.html 'http://www.csulb.edu'
>
> nanog will probably line wrap that user agent line making it not correct so you'll have to put it back together correctly.  It will save the output to a file named googlebot.html you can look at to see if anything weird ends up being served.
>
> David
>
>
>> -----Original Message-----
>> From: Matthew Black [mailto:Matthew.Black at csulb.edu]
>> Sent: Tuesday, June 26, 2012 11:53 PM
>> To: nanog at nanog.org
>> Subject: DNS poisoning at Google?
>>
>> Google Safe Browsing and Firefox have marked our website as containing
>> malware. They claim our home page returns no results, but redirects
>> users to another compromised website couchtarts.com.
>>
>> We have thoroughly examined our root .htaccess and httpd.conf files
>> and are not redirecting to the problem target site. No recent changes
>> either.
>>
>> We ran some NSLOOKUPs against various public DNS servers and
>> intermittently get results that are NOT our servers.
>>
>> We believe the DNS servers used by Google's crawler have been
>> poisoned.
>>
>> Can anyone shed some light on this?
>>
>> matthew black
>> information technology services
>> california state university, long beach
>> www.csulb.edu<http://www.csulb.edu>
>>
>>
>>
>
>
>
>



-- 
Sadiq S
O< ascii ribbon campaign - stop html mail - www.asciiribbon.org



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