The concept of 'hack yourself' is introduced as a powerful way for developers to learn security principles by actively participating in challenges.
Capture the Flag events are cross-functional, team-based challenges designed to help developers learn about security vulnerabilities in a hands-on way.
Effective participation in a CTF requires communication and collaboration, while avoiding spoilers or attacking the backend infrastructure.
The walkthrough begins by examining the challenge description, the target web application, and the provided source code files for initial clues.
The `curl` command is used to send GET and POST requests to the target URL, revealing how to correctly format requests with the proper content type.
The Snyk CLI tool is used to scan the project's `package.json` file, which quickly identifies a known prototype pollution vulnerability in a dependency.
Prototype pollution is a JavaScript-specific vulnerability that allows an attacker to modify an object's base prototype, injecting properties into every object in the application.
By examining the application's `index.js` file, the vulnerable `lodash.merge` function is identified as the entry point for the prototype pollution attack.
Jobs that call for the skills explored in this talk.