RE: passwords in asp pages
From: patrick (patrick_at_curioustechnology.com)
Date: 03/10/04
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To: <ian@kingcon.com>, <SECURITY-BASICS@securityfocus.com> Date: Tue, 9 Mar 2004 15:17:58 -0800
Ian,
You are right to be concerned. This technique is not considered a "best
practice" for web applications. They should be leveraging active directory
and using integrated security for connecting to the database- this will
remove cleartext passwords from the files. It also allows for the
flexibility to actually utilize the credentials of the visitor if they're
using the application within a credentialed intranet.
Check out the keywords "Integrated Security or Trusted_Connection" and
"ConnectionString" with relation to ADO.net.
As far as a demonstrated exploit, you only need to find some way of getting
access to the machine's files directly. You might investigate if the
machine is vulnerable to the ASP::$DATA Vulnerability, where you could just
grab the raw asp source from the server. This exploit looked like the
following:
http://[serverName]/[webpage.asp]::$DATA
http://192.168.0.1/index.asp::$DATA
That's just off the top of my head... any way that you can get direct access
to those files will demonstrate it (unsecured ftp... canonical attacks...
etc). Hey, anyone with access to the server suddenly can see passwords for
accounts that are not theirs... that alone is easy enough to demo.
-----Original Message-----
From: ian@kingcon.com [mailto:ian@kingcon.com]
Sent: Tuesday, March 09, 2004 6:00 AM
To: SECURITY-BASICS@securityfocus.com
Subject: passwords in asp pages
I am new to security and I have no training in asp programming, so I am
wondering if I am right in being scared of the following instance...
A IIS based website which has asp pages which contain plaintext passwords
for credentials to an sql database on another machine. The passwords are in
between <% %> so I assume that means they are only processed on the server
and the user does not see them, and there do not seem to be any .inc files
calling these pages. The server is also up to date with patches as far as I
know.
This situation really bothers me, but I'm not experienced enough too know
how it could be exploited or whether it could be exploited at all. I just
don't like the fact that passwords to a db user are scattered all over the
website. I need something to make it easy to say to the people
responsible... "Here look this is what can be done to the website to gather
the passwords and destroy your data. I don't think it is wise you do this,
it is in your best interests to change this pattern." The programmer seemed
to just brush it off, when I said that they could be viewed if their source
was viewed, by telling me that they would be only processed by the server
itself, which still doesn't make me feel good at all.
Shouldn't the password be encrypted? Seperated in their own file?
Is it correct to assume that an attacker who elevated their priveledges on
the web box could view these files and gain access too the database that way
through some other method?
What else can be done by an attacker against asp pages that would allow this
data to be discovered?
Also if I could actually just demonstrate it right before their eyes that
would be a big help.
Thanks for any advice.
Ian
:)
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any course! All of our class sizes are guaranteed to be 10 students or less
to facilitate one-on-one interaction with one of our expert instructors.
Attend a course taught by an expert instructor with years of in-the-field
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of an Ethical Hacker to better assess the security of your organization.
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