Solved

Special Characters in Form Fields blocked by SecureIIS

Posted on 2008-06-16
3
241 Views
Last Modified: 2008-06-16
Our server uses SecureIIS for security, and it has a function where it screens all POST variables from forms for special characters.  I have several content management forms on my site that need to be able to accept en-dash and em-dash characters but SecureIIS kicks out an error whenever it receives one of these because it thinks it's malicious.  Does anyone know if there is a configuration setting in SecureIIS anywhere where I can specify "safe" characters?
0
Comment
Question by:lghaman123
  • 2
3 Comments
 
LVL 9

Accepted Solution

by:
Rurne earned 500 total points
ID: 21796851
It sounds like SecureIIS is accepting only ASCII encoding.  Under the Shellcode option, you will see high-bit shellcode protection.  Anything outside of "standard" ASCII is considered high-bit (greater than €), so basically SecureIIS gives Unicode the hatchet job.  Em dash (—) and en dash (–) are covered under UTF-8, but not under ASCII.  SecureIIS readily acknowledges that this messes up multilingual sites, but this will also affect any file uploads/binary data submitted through a form.  You should disable all High Bit Shellcode options to restore functionality.
0
 

Author Comment

by:lghaman123
ID: 21797030
Thanks for your prompt response.  Not sure if my IT guys will let me do that but we'll see.

Thanks!
0
 
LVL 9

Expert Comment

by:Rurne
ID: 21797077
It's really pretty obnoxious.  It would be great if eEye would allow you to specify a particular character set and would provide proper escaping for, say, UTF-8.  However, there are several known exploits for Unicode, which is why Unicode gets blocked by default in SecureIIS.  Unfortunately, it's an either/or situation; if you want em and en dashes, you may be opening yourself to potential exploits.

HTH
0

Featured Post

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
applying error reporting code to see paypal error messages 13 51
php checkbox validation 5 27
How would I do this...? 2 27
website maintenance mode 1 17
Introduction HTML checkboxes provide the perfect way for a web developer to receive client input when the client's options might be none, one or many.  But the PHP code for processing the checkboxes can be confusing at first.  What if a checkbox is…
Foreword (July, 2015) Since I first wrote this article, years ago, a great many more people have begun using the internet.  They are coming online from every part of the globe, learning, reading, shopping and spending money at an ever-increasing ra…
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question