Vue version 2.2.1 is a minor patch release following version 2.2.0, both iterations centered around providing a reactive, component-oriented view layer for building modern web interfaces. From a developer perspective, the core functionalities and API remain consistent across these versions, ensuring a smooth upgrade process. Key features like component composition, data binding, and the virtual DOM continue to function as expected.
The primary distinction between the two versions lies in bug fixes and minor refinements. Developers should transition to version 2.2.1 to benefit from these stability improvements. Both packages are licensed under MIT, guaranteeing flexibility in various project contexts.
Both versions share the same set of development dependencies, meaning underlying tools and processes used for building and testing the Vue library are identical. This consistency offers stability in the developer environments too. Tools like Webpack, Rollup, and Babel were used in development demonstrating a focus on modern Javascript development practices. By keeping the same dependency versions, the development team ensured consistent performance and compatibility. Overall, version 2.2.1 provides a more reliable experience with minimal disruption to existing projects already using 2.2.0. The update focuses on stability and refinement rather than introducing significant new features.
All the vulnerabilities related to the version 2.2.1 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.