Vue 2.6.8 is a patch release in the Vue 2 series, building upon the solid foundation of Vue 2.6.7. While the core features and API remain consistent, developers should consider the potential implications of even minor version increments. Both versions share the same fundamental characteristics: a reactive, component-oriented view layer ideal for crafting modern web interfaces. They boast a rich set of development dependencies, including tools for linting (ESLint), bundling (Rollup, Webpack), testing (Karma, Jasmine, Nightwatch), and build processes (Babel).
Differences between the two versions are subtle but important. A primary change lies in the unpacked size of the distribution: Vue 2.6.8 is slightly larger at 2965102 bytes compared to Vue 2.6.7's 2962786 bytes. This suggests internal adjustments or minor additions. Vue 2.6.8 was released on March 1, 2019, subsequent to Vue 2.6.7, which arrived on February 21, 2019. Given the patch-level increment, developers should anticipate bug fixes and minor performance improvements. Carefully analyze the changelog (available on the official Vue.js GitHub repository) for specific fixes and enhancements pertinent to your project. Testing should always be conducted when upgrading to ensure smooth operation. This release ensures continued compatibility for existing projects that depend on the Vue 2 ecosystem while offering improved stability.
All the vulnerabilities related to the version 2.6.8 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.