Vue.js version 2.4.3 represents a subtle yet noteworthy iteration in the popular JavaScript framework compared to its predecessor, version 2.4.2. While both versions share the same fundamental description as a reactive, component-oriented view layer ideal for modern web interfaces, discernible differences emerge primarily in the realm of development dependencies and the release date of the packages.
A review of the devDependencies object reveals an identical set of tools used to develop, test, and build the Vue.js library, suggesting that the core development workflow remained consistent between the two versions. This includes essential tools like webpack for bundling, eslint for code linting, karma for testing, and Babel-related packages for ensuring compatibility across different JavaScript environments. The consistency in these dependencies indicates a focus on stability and incremental improvements rather than radical changes in the development process.
The key difference lies in the release date. Version 2.4.3 was released on September 13, 2017, a few weeks after version 2.4.2 which was released on July 21, 2017. Though no specific code changes are listed, this suggests that version 2.4.3 likely addresses bug fixes, performance enhancements, or minor compatibility adjustments discovered after the release of 2.4.2. Developers should consider upgrading to 2.4.3 to benefit from these potential improvements, ensuring a more robust and refined experience when building web applications with Vue.js.
All the vulnerabilities related to the version 2.4.3 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.