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RE: XSS vulnerabiilty testing and impact
From: "Arian J. Evans" <arian.evans () anachronic com>
Date: Thu, 27 Jul 2006 16:19:18 -0500

You say the attack surface is limited to only yourself,
but...

Google "Session Riding", "CSRF" and look at scripts like
this: http://www.spidynamics.com/spilabs/js-port-scan/
to give you an idea of all the things you can potentially
do with an arbitrary script injection vulnerability.

Two important principles to absorb:

1) You don't always know WTH your browser is busy doing

2) It's not always *you* that guiding your browser

-ae

-----Original Message-----
From: Rick Zhong [mailto:sagiko () gmail com] 
Sent: Wednesday, July 26, 2006 8:34 PM
To: pen-test () securityfocus com
Subject: XSS vulnerabiilty testing and impact

Hi,
I noticed that a very common way to detecting XSS in a lot of
penetration testing tools is to input the script in the form fields
and checking the return after submission. If the returned page
contains the original user input and execute the script, then we
confirm that user input is not sanitized and XSS exists.

My question is if the user inputs are not displayed to any other users
ANYWHERE in the application, what's the impact of this XSS
vulnerability? Or are we still consider this as an XSS vulnerability?
Can malicious intruders still take advantage of this?


regards,
Rick Zhong

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This List Sponsored by: Cenzic

Concerned about Web Application Security? 
Why not go with the #1 solution - Cenzic, the only one to win the Analyst's 
Choice Award from eWeek. As attacks through web applications continue to rise, 
you need to proactively protect your applications from hackers. Cenzic has the 
most comprehensive solutions to meet your application security penetration 
testing and vulnerability management needs. You have an option to go with a 
managed service (Cenzic ClickToSecure) or an enterprise software 
(Cenzic Hailstorm). Download FREE whitepaper on how a managed service can 
help you: http://www.cenzic.com/news_events/wpappsec.php 
And, now for a limited time we can do a FREE audit for you to confirm your 
results from other product. Contact us at request () cenzic com for details.
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