YAHOO BUGS

=====================>> Security Advisory <<=====================//



------------------------------ ------------------------------

---------
Multiple YAHOO BUGS
---------------------------------------------------------------------



--[ Author: Sumit Siddharth and Kishor Sonawane, NII Consulting (www.nii.co.in)

--[ Discovery Date: 07/12/2005

--[ Vendor Contacted: 07/12/2005

--[ vendor response: No response

--[Bug released: 21/12/2005

--[ Website: www.yahoo.com

--[ Severity: Low




YAHOO MAIL XSS BUG

A XSS bug was identified in YAHOO mail. We are not able to verify whether it is remotely exploitable, thus we will call it a bug.

Yahoo mail has a Yahoo Notepad feature. The same has options for maintaining folder(s). There exists an option to rename a folder. The prompt which appears allows any arbitrary script execution. However, we are still not able to verify if it is remotely exploitable.
Screen shot can be seen at the following links

1. http://www.nii.co.in/vuln/yahoo1.jpg
2. http://www.nii.co.in/vuln/yahoo2.jpg

---------------------------------------------------------------------

Yahoo mail URL injection/URL redirection:-

http://login.yahoo.com/config/login?.intl=us&.src=ym&.done=http%3a//google.com

The done parameter is not properly sanitized before returning the URL. Thus after successful validation the victim will be redirected to any URL (google here). This can then be followed by a phishing attack.

---------------------------------------------------------------------

Yahoo Videos URL Injection/URL Redirection:-


http://video.search.yahoo.com/video/view?&h=92&w=120&type=realmedia&rurl=www.cricketfundas.com%2Fmultimedia.htm&vurl=www.nii.co.in/index.html&back=p%3Dsachin%2Btendulkar%26ei%3DUTF-8%26fl%3D0%26cv%3Dg%26fr%3D%26b%3D21&turl=scd.mm-so.yimg.com%2Fimage%2F1791848075&name=tiedtest.ram&no=22&tt=24&p=sachin+tendulkar&dur=273

Note that the Play video can be made to point to any URL (www.nii.co.in here).This can be done to other parameters as well.

--------------------------------------------------------------------
Yahoo Multiple URL Redirection:-
eg. http://in.rd.yahoo.com//prop/?http://google.com
-------------------------------------------------------------------
Thanks
Sumit and Kishor

Yahoo Advisory

My Advisory for Yahoo redirection vulnerability ,made yahoo take immediate actions and within half an hour
the vulnerable links on the yahoo U.S servers were updated .
Read my advisory here.
SumSid

Security Focus Article

Check out my articles on SecurityFocus
Comments/Suggestions invited.
Thanks
Sumit