AngularJS DOM XSS Attack - Understanding $on.constructor
Updated: November 19, 2024
Summary
The video explains the transition from AngularJS to Angular due to its deprecation in 2022. It dives into the vulnerability in JavaScript frameworks related to evaluating content in curly brackets, leading to injection vulnerabilities. The demonstration includes exploiting the vulnerability by injecting a payload to execute JavaScript functions like alert. Furthermore, it explores creating a basic AngularJS document with directives, controllers, and understanding scope properties. The video also covers the use of the function constructor in JavaScript to dynamically create functions and bypass security measures in Angular to execute JavaScript functions.
Introduction to AngularJS
Explanation of AngularJS as a JavaScript framework and its deprecation in 2022, replaced by Angular which uses TypeScript.
Understanding the Vulnerability
Deep dive into the vulnerability in JavaScript frameworks that evaluate content in curly brackets, showcasing injection vulnerabilities.
Payload Solution
Providing a payload using curly brackets to exploit the vulnerability and execute JavaScript functions like alert.
Building an AngularJS Document
Creating a basic AngularJS document with directives, controllers, and initializing the app.
Accessing Scope Properties
Exploring the scope properties in AngularJS and accessing them using the console for better understanding.
Function Constructor in JavaScript
Explanation of the function constructor in JavaScript and its usage to create functions dynamically.
Understanding Constructor Property
Exploring the constructor property in JavaScript and how it returns a reference to the function that created the object.
Exploiting the Vulnerability with Angular
Utilizing the constructor property to bypass security measures in Angular and execute JavaScript functions.
FAQ
Q: What is the difference between AngularJS and Angular?
A: AngularJS is a JavaScript framework, while Angular is its successor that uses TypeScript.
Q: What is a vulnerability in JavaScript frameworks related to evaluating content in curly brackets?
A: The vulnerability is related to injection vulnerabilities that can occur when input within curly brackets is not properly sanitized.
Q: Can you provide an example of a payload using curly brackets to exploit a vulnerability?
A: Sure, a payload could include something like {{alert('XSS vulnerability exploited')}} to execute JavaScript functions like alert.
Q: What are directives and controllers in AngularJS?
A: Directives are markers on a DOM element that tell AngularJS to attach a specified behavior to that DOM element. Controllers are JavaScript functions that are bound to a scope.
Q: What is the constructor property in JavaScript used for?
A: The constructor property in JavaScript returns a reference to the function that created the object.
Q: How can the constructor property be utilized to bypass security measures in Angular?
A: By accessing the constructor property, it is possible to execute JavaScript functions that may bypass security measures in Angular.
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