tailieunhanh - Foiling_Cross-Site_Attacks

Figure 1 illustrates how this form appears in a web browser. Of course, more important than this form is the script that receives it. If the data being submitted in the form is not properly validated, malicious users can insert a dangerous script or worse, and your only hope is that the malicious user isn’t very creative in their attack. Consider that the registration data is stored in a database and that the SQL statement used to store this data is generated as follows: | Zend The php Company In partnership with Zend Technologies Zend Studio is the official PHP IDE of php cruise We ve got you covered jd from port to sockets. php Cruise Port Canaveral Coco Cay Nassau March 1st- March 5tt2004 Signup now and save Hurry special offer ends October 31st. Visit us at cruise for more details. Andrei Zmievski - Andrei s Regex Clinic James Cox - XML for the Masses Wez Furlong - Extending PHP Stuart Herbert - Safe and Advanced Error Handling in PHP5 Peter James - modrewrite From Zero to Hero George Schlossnagle - Profiling PHP Ilia Alshanetsky - Programming Web Services John Coggeshall - Mastering PDFLib Jason Sweat - Data Caching Techniques Plus Stream socket programming debugging techniques writing high-performance code data mining PHP 101 safe and advanced error handling in PHP5 programming smarty and much much more Foiling Cross-Site Attacks by Chris Shiflett Security is a nebulous topic. Web applications are often described as being secure or insecure and this yields dangerous misconceptions and confusion. Just how secure is a secure web application The inference is that secure web applications are 100 secure and invulnerable to any type of attack. Based on this we can safely consider every web application to be insecure. Now that we have established that all web applications are insecure I will explain how to make your web applications more secure by describing two contrasting types of attacks Cross-Site Scripting XSS and Cross-Site Request Forgeries CSRF . My hope is that you will not only learn some specific strategies for protecting against these types of attacks but more importantly that you will also gain crucial insight that can help you more clearly understand web application security in general. Cross-Site Scripting As a PHP professional you have most likely heard of Cross-Site Scripting XSS . In fact you may have already taken steps to protect your own web applications against xSs attacks. The .