Securing JavaScript

JavaScript is a very powerful programming language mostly used for the Web. JavaScript is an object-oriented programming language and is mostly used in web pages to provide additional functionalities such as forms submission, validation, intelligent user interaction, and many more. The JavaScript function is embedded in web pages and actions are performed by interaction with DOM (Document object model) of the web page. JavaScript is not only used in webpages, but it is also being used in an android based application by using different cross-platform tools and in server-side coding.

Security Issues

JavaScript contains various security issues and since its release, there have been lots of security breaches because of its vulnerabilities. Cross-site scripting is one of the major issues in JavaScript language. Cross-site scripting manipulate JavaScript-based websites to return malicious code in the target browser. This major vulnerability leads to data theft, target redirected to a malicious webpage, target machine being compromised, etc. CSRF (cross-site request forgery) is another major vulnerability present in JavaScript programming language that lets an attacker manipulate the target browser to perform unplanned functions. Attackers send malicious requests to perform intended actions by using the victim’s cookies. There are various other security vulnerabilities present in JavaScript such as improper client-server authentication, malicious browser plugins, misconfigured implementation of a sandbox environment, and SQL Injection in server-side code.

How to secure

Different tools and techniques are available to secure JavaScript webpages and applications. Writing secure and clean code to enhance the security and privacy of users is always a goal for developers and stakeholders. Some of the techniques to secure JavaScript programming language are as follows:

SAST: Static application security testing (SAST) is a tool for writing secure and clean JavaScript code by finding errors immediately during code development. It can help in finding vulnerabilities and developing high-end Webpages and Web applications. The SAST tool handles business problems by identifying code errors and viruses.

Code Obfuscation: Securing JavaScript code is very important because the first technique an attacker utilizes is by reading and understanding JavaScript code, that is easily available in Web browsers. If code is easily understandable then it is very easy to manipulate and perform malicious actions against JavaScript-based webpages and applications. So, a developer can minimize all these risks by using the obfuscation method i.e. modifying code in a way to make it hard for an attacker to understand it. Obfuscation can’t secure JavaScript completely but minimizes risk to a certain extent. Security of obfuscation can be enhanced by using obfuscation in combination with the packer method i.e. obfuscation and compression method.

Session Management: Attackers can manipulate authentication methods by impersonating as an authentic user and perform different attack actions. This can be secure by using time-based session tokens and session token must be recreated after each login. Secondly, HTTPS protocol for the transmission of session tokens.

Strict Mode: Strict mode must be used to perform code optimization by removing errors and showing those errors during code development. Hence, removing code errors that might result in code development related vulnerabilities.

Encryption: Encryption increases the security of JavaScript code to a great extent. All the data must be encrypted during transmission and a secure mechanism must be used for transmission of critical data such as SSL, TLS, and HTTPS and unnecessary data must be eliminated to secure sensitive data.

Password Management: Strong algorithms must be used for password storage and creation. Strong password standards must be used for password management and a 2-factor authentication mechanism must be made mandatory for authentication.

Cookies: Cookies are data chunks stored in the user’s web browser during web surfing. These are used to track and save user’s session data. Cookies must be accessed only via HTTPS and access must be permitted through JavaScript. Secondly, cookies must be accessed through proper domains and cookies must expire after a specific time.


Codesealer Solution

Codesealer provides a unique product CONNECT that uses an end-to-end security strategy to secure JavaScript before it leads to devastating attacks. It utilizes advanced obfuscation to secure HTTP traffic, prevent DOM changes, encrypt URLS and much more.

With CONNECT firms are secured that even if a supplier have a breach, the firm websites and servers can’t be targeted.


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