WebApp Sec mailing list archives

RE: #include file tag in HTML: possible issues?


From: "Giuseppe DELL'ERBA" <giuseppe.dellerba () st com>
Date: Fri, 20 Jan 2006 17:05:31 +0100

...any additional feedbacks about the request below?
Thanks
Peppe

-----Original Message-----
From: giuseppe dellerba [mailto:giuseppe.dellerba () st com] 
Sent: Monday, January 16, 2006 11:43 AM
To: 'Aman Raheja'; 'pg_vlad () hotmail com'; 'webappsec () securityfocus com'
Subject: RE: #include file tag in HTML: possible issues?


More details for your feedbacks: the application creates HTML pages, on URL basis, using templates. The content 
aggregation logic is based on JSP. The application will retrieve these templates and, using TAGLIB technology, will 
substitute the TAGLIB with the dynamic content and metadata. The idea is to add the #include file tag in the new 
templates. The contents and the templates come from company internal resources.

Thanks
Peppe


-----Original Message-----
From: Aman Raheja [mailto:araheja () techquotes com] 
Sent: Sunday, January 15, 2006 5:12 PM
To: Giuseppe DELL'ERBA
Cc: webappsec () securityfocus com
Subject: Re: #include file tag in HTML: possible issues?


What type of code are we talking about ?
Not knowing what type of code is the application or stored in the 
external file that gets inserted, it would be hard for anyone to think 
of the threat scenarios, let alone the suggestions for remediation. If the external file's contents are checked against 
different types of 
attacks that the particular code could possibly be vulnerable to, it 
should be fine.
Moreover, who created these external files is a valid concern, since you 
have not mentioned. If the external file's content is controlled that 
could be another layer of security towards the final application. Regards Aman Raheja

Giuseppe DELL'ERBA wrote:

Hi all,

I have to evaluate from security point of view an application that is
going to add in its template pages the #include file tag.
This will allow a section of code to be inserted in the page, and the code that is inserted may be stored in an 
external file.  

Do you think this feature can introduce possible security threats? And,
eventually, the remediation needed?

Thanks
Peppe



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