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Re: ASP Security Hole (fwd)
From: JKing () GFPGROUP COM (Justin King)
Date: Thu, 10 Feb 2000 15:47:36 -0500


It has been preached by the ASP industry professionals for as long as I've
been in it, that ALL included files MUST have a ".asp" extension and that
ASP debugging should be disabled on all production servers in order to keep
all code out of evil hands.

The problem here is 100% between the chair and the keyboard.

 -----Original Message-----
From:   bgreenbaum () SECURITYFOCUS COM [mailto:bgreenbaum () SECURITYFOCUS COM]
Sent:   Wednesday, February 09, 2000 7:22 PM
To:     BUGTRAQ () SECURITYFOCUS COM
Subject:        ASP Security Hole (fwd)

Forwarded with permission of the author. Please direct all replies to
jwalsh () jwsg com 

Ben Greenbaum
Director of Site Content
Security Focus
http://www.securityfocus.com

---------- Forwarded message ----------
Description:
============
Active server pages (ASP) with runtime errors
expose a security hole that publishes
the full source code name to the caller.
If these scripts are published on the
internet before they are debugged by
the programmer, the major search
engines index them.  These indexed
ASP pages can be then located with a
simple search.  The search results publish
the full path and file name for the ASP
scripts. This URL can be viewed in a browser
and may reveal full source code with
details of business logic, database location
and structure.

Procedure:
==========
- In the Altavisa search engine execute a search for
+"Microsoft VBScript runtime error" +".inc, "

- Look for search results that include the full
path and filename for an include (.inc) file.

- Append the include filename to the host name
and call this up in a web browser.
Example:  www.rodney.com/stationery/browser.inc

Examples:
=========
http://shopping.altavista.com/inc/lib/prep.lib
Exposes database connections and properties, resource locations,
cookie logic, server IP addresses, business logic

http://www.justshop.com/SFLib/ship.inc
Exposes database properties, business logic

http://www.bbclub.com:8013/includes/general.inc
Exposes cobranding business logic

http://www.salest.com/corporate/admin/include/jobs.inc
Exposes datafile locations and structure

http://www.bjsbabes.com/SFLib/design.inc
Exposes source code for StoreFront 2000 including
database structure

http://www.ffg.com/scripts/IsSearchEngine.inc
Exposes search engine log

http://www.wcastl.com/include/functions.inc
Exposes members email addresses and
private comments file http://www.wcastl.com/flat/comments.txt

http://www.traveler.net/two/cookies.inc
Exposes cookie logic

Resolution:
===========

- Search engines should not index pages that
have ASP runtime errors.

- Programmers should fully debug their ASP
scripts before publishing them on the web

- Security administrators need to secure
the ASP include files so that external users
can not view them.

===========================
Jerry Walsh
JW's Software Gems
Email  jwalsh () jwsg com
Phone  (949) 855-0233
Website http://www.jwsg.com
===========================


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