From: Daniel Grzelak (daniel.grzelak@sift.com.au)
Date: Thu Jul 21 2005 - 19:51:25 EDT
Dan,
Get yourself a copy of openssl (cygwin based openssl works well on Windows).
Using the command line client you can connect to the web server using a
variety of ciphers/digests and even supply client certificates. In this way
you can supply clear text input to verify whatever vulnerabilies nessus
identified as well as test for which ciphers are allowed.
A simple connection will look a little like this:
openssl s_client -cert <mycert.pem> -cipher <CIPHER-XXX> -connect
<10.0.0.0>
A great tutorial on simple use of the tool is available here:
http://www.madboa.com/geek/openssl/
Daniel Grzelak
Associate
SIFT
www.sift.com.au
"SIFT is a leading Australian information security consulting, intelligence
and training firm. We specialise in the delivery of independent advice,
reviews and recommendations to the senior management of large,
highly-regulated organisations."
-----Original Message-----
From: Dan Rogers [mailto:pentestguy@gmail.com]
Sent: Friday, 22 July 2005 1:06 AM
To: pen-test@securityfocus.com
Subject: verify HTTPS 'vulnerabilities'
List,
Simple question:
I have a report from Nessus telling me that a web server is offering 'export
class' cyphers for it's SSL/TLS service. Nessus also managed to obtain an
internal IP address from the host (which is correct).
Only HTTPS is open.
However the target host requires basic authentication, and I don't have any
credentials to obtain access. I would like to verify these manually, and
would usually just use something like wfetch. However, I'm not getting the
usual prompt that my encryption is too weak.
Instead in the response I can see a message saying the page cannot be
displayed. There is also no sign of the internal IP address.
Can anyone tell me how they would prove that they are not false positives (I
know the IP address is correct, but the client may want to replicate the
vulnerability so they can be sure when they go to fix it)?
thanks
Dan
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