Vue version 2.2.0 marks an iteration in the popular JavaScript framework known for building user interfaces and single-page applications. Compared to its predecessor, version 2.1.10, it includes updated development dependencies that are crucial for developers to ensure smooth integration and compatibility during development and testing. The update brings changes in tools like webpack, rollup, flow-bin , buble, eslint-plugin-vue, and other testing and build-related utilities. Specifically, the jump from webpack 1.13.2 to webpack 2.2.0 is signficant, potentially unlocking improved build times and new features for developers leveraging Vue within webpack-driven projects. Those updating should check the webpack migration guide.
The upgrades in rollup versions, from 0.36.1 to 0.41.4, can offer improved module bundling efficiency. Similarly, the shift in buble, a JavaScript compiler, from 0.14.0 to 0.15.2, might provide enhanced ES2015+ syntax support. The update from eslint-plugin-vue 1.0.0 to 2.0.0 suggest considerable linting rule changes for Vue components to enfore consistent code style. Although the core functionality remains similar as described by same "Reactive, component-oriented view layer" description, these updated dependencies contribute to a more refined workflow, potentially enhancing performance, stability, and developer experience. Developers should review the changelogs of each updated dependency to fully grasp the implications of these updates on their projects.
All the vulnerabilities related to the version 2.2.0 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.