Vue 2.4.0 represents an incremental update over the previous stable version, Vue 2.3.4, bringing improvements and updated dependencies to enhance the developer experience. Both versions offer the core benefits of Vue.js: a reactive, component-oriented view layer ideal for building modern web interfaces with ease. The update includes upgrades to several key development dependencies, such as Webpack (from 2.2.0 to 2.6.1), ESLint (from 3.10.1 to 3.0.0 - downgraded for compatibility), and Rollup (from 0.41.4 to 0.45.1), offering potential performance and build process enhancements.
A notable change is the update of Uglify-js from version 2.6.2 to 3.0.15, which could lead to smaller bundle sizes and optimized JavaScript code. Karma, the test runner, also receives a significant upgrade from 1.1.0 to 1.7.0, potentially improving testing stability and feature set. Furthermore, the update includes newer versions of tools like ChromeDriver (from 2.21.2 to 2.30.1) for automated testing and Babel-related packages, ensuring compatibility with the latest JavaScript syntax and features. Developers should appreciate the updated tooling ensuring better compatibility with modern web development practices and potentially streamlining the development workflow via dependency updates. This incremental update represents a commitment to keeping Vue.js current and optimized for modern web development, enhancing reliability, and performance.
All the vulnerabilities related to the version 2.4.0 of the package
ReDoS vulnerability in vue package that is exploitable through inefficient regex evaluation in the parseHTML function
The ReDoS can be exploited through the parseHTML function in the html-parser.ts file. This flaw allows attackers to slow down the application by providing specially crafted input that causes inefficient processing of regular expressions, leading to excessive resource consumption.
To demonstrate this vulnerability, here's an example. In a Vue client-side application, create a new Vue instance with a template string that includes a <script> tag but closes it incorrectly with something like </textarea>.
new Vue({
el: '#app',
template: '
<div>
Hello, world!
<script>${'<'.repeat(1000000)}</textarea>
</div>'
});
Next, set up a basic HTML page (e.g., index.html) to load this JavaScript and mount the Vue instance:
<!DOCTYPE html>
<html>
<head>
<title>My first Vue app</title>
</head>
<body>
<div id=\"app\">Loading...</div>
</body>
</html>
When you visit the app in your browser at http://localhost:3000, you'll notice that the time taken to parse and mount the Vue application increases significantly due to the ReDoS vulnerability, demonstrating how the flaw can affect performance.