Detection of Javascript Vulnerability At Client Agen

These days, most of companies expanding their business horizon through dynamic web sites based on Web 2.0 concept. The JavaScript is a key choice of web developers to build sophisticated dynamic web 2.0 application such social network site, blogs, e-commerce websites. On the other hand vulnerable JavaScript code is also exploited by the hackers to launch the attacks. Hacker may tamper the JavaScript code to perform attacks against the client’s browser. In this work the series of attacks such as click-jacking, password capturing, phishing and cookies stealing are developed to understand to affect of vulnerable JavaScript code on web browser. The detection of vulnerable JavaScript code is a tedious task for security experts. Hence signature and regular expression based matching mechanism has been developed to detect the vulnerable JavaScript code. Index Terms Web Security, JavaScript, Web Browser, JavaScript Interpreter, Malware, Phishing, Clickjacking.