DNS poisoning at Google?

Matthew Black Matthew.Black at csulb.edu
Wed Jun 27 00:40:22 CDT 2012


Thanks again to everyone who helped. I didn't know what to enter with curl, because Outlook clobbered the line breaks in Jeremy's original message.

Also, curl failed on our primary webserver because of firewall and load balancer magic settings. The Telnet method worked better!

Our team is now scouring for that hidden redirect to couchtarts.

matthew black
information technology services
california state university, long beach



From: Landon Stewart [mailto:lstewart at superb.net]
Sent: Tuesday, June 26, 2012 10:37 PM
To: Matthew Black
Cc: Jeremy Hanmer; nanog at nanog.org
Subject: Re: DNS poisoning at Google?

There is definitely a 301 redirect.

$ curl -I --referer http://www.google.com/ http://www.csulb.edu/
HTTP/1.1 301 Moved Permanently
Date: Wed, 27 Jun 2012 05:36:31 GMT
Server: Apache/2.0.63
Location: http://www.couchtarts.com/media.php
Connection: close
Content-Type: text/html; charset=iso-8859-1

On 26 June 2012 22:05, Matthew Black <Matthew.Black at csulb.edu<mailto:Matthew.Black at csulb.edu>> wrote:
Google Webtools reports a problem with our HOMEPAGE "/". That page is not redirecting anywhere.
They also report problems with some 48 other primary sites, none of which redirect to the offending couchtarts.

matthew black
information technology services
california state university, long beach




-----Original Message-----
From: Jeremy Hanmer [mailto:jeremy.hanmer at dreamhost.com<mailto:jeremy.hanmer at dreamhost.com>]
Sent: Tuesday, June 26, 2012 9:58 PM
To: Matthew Black
Cc: nanog at nanog.org<mailto:nanog at nanog.org>
Subject: Re: DNS poisoning at Google?
It's not DNS.  If you're sure there's no htaccess files in place, check your content (even that stored in a database) for anything that might be altering data based on referrer.  This simple test shows what I mean:

Airy:~ user$ curl -e 'http://google.com' csulb.edu<http://csulb.edu> <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head>
<title>301 Moved Permanently</title>
</head><body>
<h1>Moved Permanently</h1>
<p>The document has moved <a href="http://www.couchtarts.com/media.php">here</a>.</p>
</body></html>

Running curl without the -e argument gives the proper site contents.
On Jun 26, 2012, at 9:24 PM, Matthew Black <Matthew.Black at csulb.edu<mailto:Matthew.Black at csulb.edu>> wrote:

> Running Apache on three Solaris webservers behind a load balancer. No MS Windows!
>
> Not sure how malicious software could get between our load balancer and Unix servers. Thanks for the tip!
>
> matthew black
> information technology services
> california state university, long beach
>
>
>
> From: Landon Stewart [mailto:lstewart at superb.net<mailto:lstewart at superb.net>]
> Sent: Tuesday, June 26, 2012 9:07 PM
> To: Matthew Black
> Cc: nanog at nanog.org<mailto:nanog at nanog.org>
> Subject: Re: DNS poisoning at Google?
>
> Is it possible that some malicious software is listening and injecting a redirect on the wire?  We've seen this before with a Windows machine being infected.
> On 26 June 2012 20:53, Matthew Black <Matthew.Black at csulb.edu<mailto:Matthew.Black at csulb.edu><mailto:Matthew.Black at csulb.edu<mailto:Matthew.Black at csulb.edu>>> wrote:
> 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<http://couchtarts.com><http://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><http://www.csulb.edu><http://www.csulb.edu>
>
>
>
> --
> Landon Stewart <LStewart at Superb.Net<mailto:LStewart at Superb.Net<mailto:LStewart at Superb.Net>>>
> Sr. Administrator
> Systems Engineering
> Superb Internet Corp - 888-354-6128 x 4199<tel:888-354-6128%20x%204199> Web hosting and more "Ahead
> of the Rest":
> http://www.superbhosting.net<http://www.superbhosting.net/>
>






--
Landon Stewart <LStewart at Superb.Net<mailto:LStewart at Superb.Net>>
Sr. Administrator
Systems Engineering
Superb Internet Corp - 888-354-6128 x 4199
Web hosting and more "Ahead of the Rest": http://www.superbhosting.net<http://www.superbhosting.net/>



More information about the NANOG mailing list