full-disclosure - Re: yahoomail dom based xss vulnerability

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Message-ID: <528952.67315.qm@web46110.mail.sp1.yahoo.com>
Date: Tue, 15 Jun 2010 21:19:47 -0700 (PDT)
From: pratul agrawal <pratulag@...oo.com>
To: Benji <me@...ji.com>
Cc: "info@...t-in.org.in" <info@...t-in.org.in>,
	"full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk>,
	"security@...oo.com" <security@...oo.com>
Subject: Re: yahoomail dom based xss vulnerability

Thanks Brother,

                      See, how this occurred, Basically in most of the cases Developers  Simply design a APIs and when the client request for any page this APIs gets Stored in the Client side. its main task is to takes the user input and shows the result immediately  to the client without sending request to the server. so when this type of APIs is vulnerable to XSS this is called the DOM based XSS. 

Now in this case, when we click on [New Folder] for creating any new folder and provide any javascript, it directly took by the API stored in the client side when the inbox page is load in the client side in yahoomail, and get reflected. 

that's all the story Bro, hope you understand what i really want to say.

Thanks,
Pratul Agrawal  

--- On Tue, 15/6/10, Benji <me@...ji.com> wrote:

From: Benji <me@...ji.com>
Subject: Re: [Full-disclosure] yahoomail dom based xss vulnerability
To: "pratul agrawal" <pratulag@...oo.com>
Cc: "skg102@...il.com" <skg102@...il.com>, "full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk>, "security@...oo.com" <security@...oo.com>, "info@...t-in.org.in" <info@...t-in.org.in>
Date: Tuesday, 15 June, 2010, 9:57 AM

Sup bro 
I waz checkin owt ur javascriptz skriptz and waz wonderin if u cud explain how diz shiz werks.
Peaze. 

Sent from my iPhone
On 15 Jun 2010, at 09:18, pratul agrawal <pratulag@...oo.com> wrote:

Its working Bro.  I think u had done some mistakes so u try it again with check that javascript execution feature is enable in your browser. and bro for execution of script it is must to use proper syntax that contain special characters. just put "><script>alert(123)<script>  in the New Folder field comes in the Move button and you will saw a pop up message with 123 reflected.

Have a nice time bro,
Pratul Agrawal

--- On Tue, 15/6/10, ㅤ ㅤRockey <skg102@...il.com> wrote:

From: ㅤ ㅤRockey <skg102@...il.com>
Subject: Re: [Full-disclosure] yahoomail dom based xss
 vulnerability
To: 
Cc: full-disclosure@...ts.grok.org.uk, security@...oo.com, info@...t-in.org.in
Date: Tuesday, 15 June, 2010, 5:10 AM

Tried reproducing on yahoo mail
both on the classic and new one . Error message i got in both cases were

"Sorry, but your folder name has prohibited characters (please use letters, numbers, dashes, and underscores). Please fix it and try again."

Cheers,
Rockey

--
It's all about Hacking and Security

http://h4ck3r.in/

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Hosted and sponsored by Secunia - http://secunia.com/