Penetration Testing: RE: Web app error messages.

["Hagen, Eric" <hagene () DenverNewspaperAgency com>]

That's a standard IIS message that is given out when you try to browse the root of a directory that does not exist.

http://support.microsoft.com/kb/185380/EN-US/

You can simply drop an apporpriate index.html (or other default named) file in there if you want to customize the 
message depending on the directory that is entered.

http://support.microsoft.com/kb/320051

or...

You can configure IIS to automatically return a specific page rather than the directory listing error.  (See error 
403.14)

http://www.microsoft.com/windows2000/en/server/iis/default.asp?url=/windows2000/en/server/iis/htm/core/iierrabt.htm


Eric


-----Original Message-----
From: listbounce () securityfocus com
[mailto:listbounce () securityfocus com]On Behalf Of Lee Lawson
Sent: Thursday, October 26, 2006 8:17 AM
To: pen-test () securityfocus com
Subject: Web app error messages.


Hi all,

I have recently conducted a web application penetration test for a
client and I am a little stuck as to the resolution advice I need to
give.

I have highlighted, among other things, the enumeration of 'hidden'
directories within the app.  This is normally conducted by finding
Access Denied or Forbidden messages, but I have come across the
following message:
"Virtual Directory Listing Denied."

That is all that is displayed on the page!  They are using asp and IIS.

What I need to know is:
what exactly is creating the error message?  IIS? ASP? etc.
How to create a bespoke error message or preferably redirect the user
to the home page?

Thanks in advance.

-- 
Lee J Lawson
leejlawson () gmail com
leejlawson () hushmail com

"Give a man a fire, and he'll be warm for a day; set a man on fire,
and he'll be warm for the rest of his life."

"Quidquid latine dictum sit, altum sonatur."

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