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Network Security Web-App-Sec
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Re: Writing to a local file without a warning

Subject: Re: Writing to a local file without a warning
Date: Wed, 29 Mar 2006 00:31:03 -0600
For local development on my home machine I have used Abyss Web Server by Aprelium Technologies, currently at version 2.3. It is probably the simplest and easiest to set up web server I have encountered.

I haven't used it since probably about 2 years ago so I'm sure it's much better now than it was then, but at the time I would not have considered it for high traffic or multiple-domain situations (and as I'm a linux server purist I wouldn't set up a windows box to serve a live web site anyways), but for what you are proposing it seems to me this would be the perfect solution.

My experience with it is limited to running PHP as a CGI, though I'm sure it handles other server side scripting languages without issue.

http://www.aprelium.com/

DISCLAIMER: I am in no way affiliated with Aprelium Technologies or the development of the Abyss Web Server in any fashion.

Regards,
- Todd

Griffiths, Ian wrote:
If I'm understanding you correctly, a web server would be  far better
solution.  If the survey isn't too complicated then the code to save the
answers shouldn't be either.

Ian

-----Original Message-----
From: Frank Heyne [mailto:fh@rcs.urz.tu-dresden.de] Sent: 28 March 2006 17:33
To: webappsec@securityfocus.com
Subject: Writing to a local file without a warning



Hello,

this is more about webappinsec, but anyway I hope to get a hint whether
what I need to do is possible at all. You can answer offline, if you prefer.


Question:
Is it possible to write a local file from a ht* file without the
interception of a warning or other dialog?


Task:
There is a standalone Windows machine with a html page from where people
can view information stored in local files with IE. It is nearly like a
kiosk, except the following: There is a questionnaire where people can give some feedback. This must
write the answers to local files in a write only directory with vbscript.


Problem:
All works well except that I still found no way to remove all security dialogues.


What I tried:
1. I can either put the questionnaire in a html file - than the user
sees a security warning about the unsecure ActiveX object (File SystemObject)
when he hits the submit button.
2. When I put the questionnaire in a hta file, this warning is missing,
but there is a dialog asking whether the user wants to run or save the
(local!) hta file when he clicks on the link to it.


I understand that this behavior is ok in most scenarios, but I need an exception for this machine - is this possible and how? I would prefer a quick solution over installing a local web server or
sql server, of course


Any ideas?

Frank Heyne

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Learn how to defend against Web Application Attacks with real-world examples of recent hacking methods such as: SQL Injection, Cross Site Scripting and Parameter Manipulation


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