WebApp Sec mailing list archives

RE: Writing to a local file without a warning


From: "Griffiths, Ian" <Ian.Griffiths () liv-coll ac uk>
Date: Tue, 28 Mar 2006 19:44:41 +0100

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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