Getting around mutual Certificate authentication using safenet 2032 tokens enforced in a webapp

["Matthew Zimmerman" <mzimmerman () gmail com>]

The list rejected my "rich" formatting... resending.

---------- Forwarded message ----------
From: Matthew Zimmerman <mzimmerman () gmail com>
Date: Wed, Nov 19, 2008 at 7:35 AM
Subject: Getting around mutual Certificate authentication using
safenet 2032 tokens enforced in a webapp
To: pen-test <pen-test () securityfocus com>, webappsec () lists owasp org


So my organization recently switched to requiring client
authentication as well as server authentication on our web
applications.  These places are using PKI certificates issued from our
CA.  The client certificates are contained on safenet 2032 tokens
(ikey, rainbow token, etc).  This is great for security.

It's not great for security testing however.  Because of this, a proxy
like Paros / Webscarab / Burp / etc won't work.  The webserver returns
4xx errors to us if we don't use the right cert.

So there's two ways around it I think.  1) Get the whole certificate
off of the token in PKCS#12 (including the private key) so we can
import it into these tools.  2) Work directly with the browsers to
allow more manipulation other than URLs/GETs.  3) Pass the http
protocol through another tool that supports safenet 2032 tokens?
(Would be very slow setting up each https connection...)

Something that would work for #2 would be a browser addon like Tamper
Data for Firefox; however, I can't seem to get the 2032 tokens to work
with firefox correctly (seems to be that the 2032 only implements
pkcs#11 and firefox is looking for a pkcs#12 device, but I am by no
means a PKI guy).  Which brings me to addons that are available for
internet explorer that allow on-the-fly modification; which I found
none.

3) The last option is to request software certs (already in PKCS#12
format) for all future tests.  Although with this case, it's pretty
hard to convince to management to fix their SQL injection issue if you
need someone on the inside to issue you a software cert instead of the
2032...

Any ideas?

Thanks,
Matt Z

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