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Re: Web App Pen Test Results
From: "Jürgen R. Plasser" <plasser () hexagon at>
Date: Mon, 06 Nov 2006 11:42:47 +0100

tsax68 () hotmail com wrote:
We recently had our web app scanned with WebInspect and given the results.  Thankfully, the findings aren't too severe 
:0, but I do have a question.  One of the findings is labeled:

302 Error Message Cross-Site Scripting
Summary:  The handling of certain HTTP requests that produce "302 object moved" responses allows attackers to launch 
cross-site scripting attacks.  When the server receives and HTTP request for a directory without a trailing slash, it returns a 
302 object moved error message, redirecting the client to the requested directory, with a forward slash.  Also included in the 
body of the HTTP response are any GET parameters that were included in the original request.  These parameters are not properly 
sanitized for malicious content before being returned to the client.

My question is, Is this being reported as an Apache issue or is this a web app issue?  I'm trying to figure out how to fix, 
but I'm not sure which direction to go web server or app.........

I don't think this is an Apache issue, more a kind of Apache configuration issue (mod_rewrite), which I rather would locate in the web app domain than on the server side.

This kind of vulnerabilities are open for HTTP response splitting attack vectors.

-Jürgen

--
Jürgen R. Plasser

Hexagon Business Solutions GmbH
Information Security & Software Quality
http://www.hexagon.at


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