Vue.js version 2.1.1 is a minor release following version 2.1.0 in the popular JavaScript framework for building user interfaces. Both versions share the same core description, emphasizing a reactive, component-oriented view layer ideal for crafting modern web experiences. Although the high-level functionalities remain consistent, the update from 2.1.0 to 2.1.1 includes targeted improvements and bug fixes, enhancing overall stability and developer experience.
Examining the package.json files reveal that both versions share identical development dependencies, spanning testing tools like Karma and Jasmine, linting tools like ESLint, and module bundlers like Rollup and Webpack. This consistency suggests that the core development workflow and testing environment for Vue.js were maintained between these releases.
The upgrade to version 2.1.1 likely addresses specific issues identified in 2.1.0 that could impact specific use cases or edge cases. For developers, this means a more refined and reliable foundation for their Vue.js projects. While the changes might not introduce significant new features, they contribute to a smoother development process by resolving potential bugs and improving compatibility. Checking the official Vue.js release notes for each version is crucial for understanding the exact nature of the fixes and improvements introduced. It is always recommended to upgrade to the latest stable patch version to benefit from the most up-to-date enhancements.
All the vulnerabilities related to the version 2.1.1 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.