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Re: DNS poisoning at Google?

From: Bryan Irvine <sparctacus () gmail com>
Date: Wed, 27 Jun 2012 00:09:11 -0700
The fun part will be figuring out how it got there. :)

Sent from my iPhone

On Jun 27, 2012, at 12:06 AM, Matthew Black <Matthew.Black () csulb edu> wrote:


We found the aberrant .htaccess file and have removed it. What a mess!

matthew black
information technology services
california state university, long beach

From: Grant Ridder [mailto:shortdudey123 () gmail com]
Sent: Tuesday, June 26, 2012 11:02 PM
To: Matthew Black; nanog () nanog org
Cc: Jeremy Hanmer
Subject: Re: DNS poisoning at Google?

It also redirects with facebook, youtube, and ebay but NOT amazon.

-Grant

On Wed, Jun 27, 2012 at 12:57 AM, Matthew Black <Matthew.Black () csulb edu<mailto:Matthew.Black () csulb edu>> wrote:
Our web lead was able to run curl. Thanks.

matthew black
information technology services
california state university, long beach

From: Grant Ridder [mailto:shortdudey123 () gmail com<mailto:shortdudey123 () gmail com>]
Sent: Tuesday, June 26, 2012 10:53 PM
To: Matthew Black
Cc: Landon Stewart; nanog () nanog org<mailto:nanog () nanog org>; Jeremy Hanmer

Subject: Re: DNS poisoning at Google?

Matt, what happens you get on a subnet that can access the webservers directly and bypass the load balancer.  Try 
curl then and see if its something w/ the webserver or load balancer.

-Grant
On Wed, Jun 27, 2012 at 12:40 AM, Matthew Black <Matthew.Black () csulb edu<mailto:Matthew.Black () csulb edu>> wrote:
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 () superb net<mailto:lstewart () superb net>]
Sent: Tuesday, June 26, 2012 10:37 PM
To: Matthew Black
Cc: Jeremy Hanmer; nanog () nanog org<mailto:nanog () 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<http://www.csulb.edu/%0d%0aHTTP/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 () csulb edu<mailto:Matthew.Black () csulb 
edu><mailto:Matthew.Black () csulb edu<mailto:Matthew.Black () 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 () dreamhost com<mailto:jeremy.hanmer () dreamhost 
com><mailto:jeremy.hanmer () dreamhost com<mailto:jeremy.hanmer () dreamhost com>>]
Sent: Tuesday, June 26, 2012 9:58 PM
To: Matthew Black
Cc: nanog () nanog org<mailto:nanog () nanog org><mailto:nanog () nanog org<mailto:nanog () 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&apos; csulb.edu<http://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 () csulb edu<mailto:Matthew.Black () csulb 
edu><mailto:Matthew.Black () csulb edu<mailto:Matthew.Black () 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 () superb net<mailto:lstewart () superb net><mailto:lstewart () superb 
net<mailto:lstewart () superb net>>]
Sent: Tuesday, June 26, 2012 9:07 PM
To: Matthew Black
Cc: nanog () nanog org<mailto:nanog () nanog org><mailto:nanog () nanog org<mailto:nanog () 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 () csulb edu<mailto:Matthew.Black () csulb 
edu><mailto:Matthew.Black () csulb edu<mailto:Matthew.Black () csulb edu>><mailto:Matthew.Black () csulb 
edu<mailto:Matthew.Black () csulb edu><mailto:Matthew.Black () csulb edu<mailto:Matthew.Black () 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><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><http://www.csulb.edu>



--
Landon Stewart <LStewart () Superb Net<mailto:LStewart () Superb Net<mailto:LStewart () Superb Net><mailto:LStewart 
() Superb Net<mailto:LStewart () Superb Net>>>>
Sr. Administrator
Systems Engineering
Superb Internet Corp - 888-354-6128 x 4199<tel:888-354-6128%20x%204199><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 () Superb Net<mailto:LStewart () Superb Net<mailto:LStewart () 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/>
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