Secure Your Software Against SQL Injections If you really need to include files with variable names, make sure to validate all these variables, try to lock down as far as possible the range of allowed values. Secondly, be very careful with all calls to functions dealing with the file system, especially include, require, include_once, require_once, fopen. You should never use the raw $_GET and $_POST arrays, instead use the Joomla JInput class, which includes sanitization of use input.
#Joomla extensions code
To secure your code against remote file inclusion, you need to make sure no unvalidated input is used when including files. You should not rely on allow_url_fopen being turned off but instead write secure code that cannot be exploited when it is turned on. But as this option is needed by many good programs as well, switching it off is not always a good idea. Remote file inclusion only works on systems that have the PHP setting allow_url_fopen switched to on. Note that using the CMD filter will prevent the inclusion of remote files by excluding the necessary characters :/, also the exclusion of directory separators in the file name will prevent directory traversal, where an attacker attempts to manipulate the path to include a file on the same server that they should not have access to. If you want to use other filters you can find out more about JInput at '/components/com_yourcomponent/views/tmpl/'.$layout ) īy default JInput applies the CMD filter to user input, which only allows the following characters: a-z, 0-9, underscore, dot, dash. $layout = $jinput->get('layout','default') $jinput = JFactory::getApplication()->input Since developers usually test their components only through Joomla!, they tend to forget about the possibility of calling files directly. Joomla! is a wrapper around your software, it provides many useful features such as user authentication. The files of your component will usually be called by Joomla!. Secure your Software Against Direct Access although the same examples will usually apply to 2.5.x as well. All code examples in this guide are written for Joomla! 3.x. Please note that when I refer to components, I also mean modules, plugins and templates as well. What to do if you discover a security issue in your software.
#Joomla extensions how to
Just having a component that runs fine on your computer is usually not enough! You need to take care of security, because otherwise your program could easily ruin the websites of your customers. However, there are a few things in terms of security that you should be aware of. Īre you a third party developer for Joomla! addons? Do you publish your programs on the Joomla! forge or on your website? Well, thank you for doing that, the community probably loves you for sharing your work! Intro: Guide to More Secure Components/Modules/Plugins. 12.9 What to Do If You Discover a Security Issue in Your Software.12.7 How to Achieve Raw Component Output (for pictures, RSS-feeds etc.).12.5 Secure Your Extension Against Cross-Site Request Forgery.12.4 Secure Your Software Against XSS Scripting.12.3 Secure Your Software Against SQL Injections.12.2 Secure Your Software Against Remote File Inclusion.12.1 Secure Your Software Against Direct Access.11 What to Do if You Discover a Security Issue in Your Software.9 How to Achieve Raw Component Output (for pictures, RSS-feeds etc.).7 Avoid Open (0777) File and Folder Permissions.6 Secure Your Extension Against Cross-Site Request Forgery.4 Secure Your Software Against SQL Injections.3 Secure Your Software Against Remote File Inclusion.2 Secure your Software Against Direct Access.1 Intro: Guide to More Secure Components/Modules/Plugins.
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