Secure Trades
MediumSecure Coding
Overview
Visit /challenge/ to access a machine containing the source code of an application located in the src directory. Your task is to fix the code to retrieve the flag. Make sure to read the rules before you begin.
Flag Format: Flag{}
Lab Details
Prerequisites & Requirements
- JavaScript Fundamentals: Understanding of objects, prototypes, and prototype inheritance
- Node.js & Express.js: Familiarity with Express.js framework and middleware concepts
- Prototype Pollution: Deep understanding of how JavaScript prototype chain works
- Object Manipulation: Knowledge of how objects are merged and properties are assigned
- Security Testing: Experience with crafting malicious payloads and testing security vulnerabilities
- JWT Authentication: Understanding of JSON Web Tokens and authentication mechanisms
- RESTful APIs: Knowledge of HTTP methods and API endpoint design
What will you learn?
- Prototype Pollution Attack Vectors: How attackers can manipulate JavaScript prototypes
- Secure Object Merging: Safe techniques for merging user-controlled data with objects
- Input Validation: Proper validation of nested object structures
- Defense Mechanisms: Multiple layers of protection against prototype pollution
- Code Review Skills: How to identify dangerous patterns in JavaScript codebases
- Secure Coding Practices: Best practices for handling user input in Node.js applications
Tools
- Burp Suite/Postman: For crafting and testing HTTP requests
- curl: Command-line tool for testing API endpoints
- Code Editor: For analyzing source code and implementing patches
Job Positions
Tags
Prototype PollutionCode ReviewInput ValidationInjection PreventionAccess Control