[Full-disclosure] Google's Orkut Group Cross Site Scripting Vulnerability



Orkut Group Cross Site Scripting Vulnerability

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XDisclose Advisory : XD100098
Vulnerability Discovered: December 08th 2006
Advisory Released :
Credit : Rajesh Sethumadhavan

Class : Cross Site Scripting
HTML Injection
Severity : Medium
Solution Status : Unpatched/Vendor notified
Vendor : Google Inc
Vendor Website : http://www.orkut.com
Affected applications : Orkut Services
Affected Platform : All

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Overview:
Orkut is an Internet social network service run by Google with more
than 37 million total members and nearly 1.3 million daily visitors.
It claims to be designed to help users meet new friends and maintain
existing relationships with pictures and messages, and establish new
ones by reaching out to people you've never met before.

Orkut service is vulnerable to Cross-Site Scripting and HTML Injection.
This is caused due to improper validation of user-supplied inputs.


Description:
A remote attacker can craft a GET request with the XSS payload as
demonstrated below. When the victim access the mailcious URL payload
will get executed which result in stealing of cookie, IP info, refer
info, browser information, clipboard content, operating system info,
hardware Info, modification of page or html injection, url redirection,
port scanning of the network, and even phishing is possible.

1)Orkut Invite XSS:

The flaws are due to improper sanitization of inputs passed to
'show' parameter in GET request
-------------------------------------------------------------------
http://www.orkut.com/Friends.aspx?show=group1);alert(document.cookie
------------------------------------------------------------------

Demonstration:
Note: Demonstration leads to your personal information disclosure

- Login to your orkut account
- Paste the above URL
- Click on 'delete group' & 'ok' button
- Orkut Cookies will get displayed

The similar way HTML injection is also possible.

Vulnerable Code:
------------------------------------------------------------------
< a href="javascript:handleDeleteGroup('', 1);alert(document.cookie);">
------------------------------------------------------------------


Solution:
Orkut can improve their filters by disallowing certain characters
like " <>/\?&`~!@#$%^*()[]|;:"' " in user input URL.


Screenshot:
http://www.xdisclose.com/images/xdorkutgroupxss.jpg


Impact:
Successful exploitation allows execution of arbitrary script code in
a user?s browser session in context of an affected site which result
in stealing of cookie, IP info, refer info, browser information,
clipboard content, operating system info, referrer info, hardware Info,
modification of page or html injection (temporary webpage defacement),
modification of page title, hijacking page flow, url redirection, port
scanning of the victim?s network, and even phishing is possible.

Impact of the vulnerability is network level.


Original Advisory:
http://www.xdisclose.com/XD100098.txt


Credits:
Rajesh Sethumadhavan has been credited with the discovery of this
vulnerability


Disclaimer:
This entire document is strictly for educational, testing and
demonstrating purpose only. Modification use and/or publishing this
information is entirely on your own risk. The exploit code is to be
used on your own orkut account. I am not liable for any direct or
indirect damages caused as a result of using the information or
demonstrations provided in any part of this advisory.

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