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Introduction to JavaScript Fuzzing

How to secure your JavaScript applications against Denial-of-Service (DoS) and Uncaught Exceptions.

JavaScript is widely used in backend and frontend applications that rely on trust and good user experience, including e-commerce platforms, and consumer-apps. Fuzz testing helps secure these applications against bugs and vulnerabilities that cause downtime and other security issues, such as Crashes, Denial-of-Service (DoS) and Uncaught Exceptions.

In this session, you will learn about:

  • fuzzing and modern fuzz testing approaches.
  • use cases and common challenges of fuzzing JavaScript applications. 
  • how to detect Denial-of-Services (DoS) vulnerabilities and Uncaught Exceptions with Jazzer.js, a coverage-guided fuzzer for Node.JS and the whole JavaScript ecosystem. 

All code examples and tools we use are open-source and easily accessible via GitHub and npmjs. If you cannot attend the session live, don't worry. The session will be recorded. Just register for the event, to get the recordings.

If you have questions, or need help to set your fuzz test for your JavaScript projects with Jazzer.js, please feel free to reach out via: oss-security@code-intelligence.com.

jest code example



About Norbert

Meet Norbert. He's a Senior Software Engineer at Code Intelligence and one of the lead engineers behind Jazzer.js.