RE: XSS vulnerabiilty testing and impact

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@xxxxxxxxx]
Sent: Wednesday, July 26, 2006 8:34 PM
To: pen-test@xxxxxxxxxxxxxxxxx
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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