Vue 2.7.6 is a minor patch release following quickly on the heels of Vue 2.7.5, both iterations of the popular JavaScript framework designed for building user interfaces and single-page applications. The core descriptions remain the same: Vue continues to offer a reactive, component-oriented view layer tailored for modern web development.
The most notable difference lies in the version bump itself, indicating bug fixes or very minor enhancements. Examining the dependencies shows only a minor difference in the version of @vue/compiler-sfc, which is updated from 2.7.5 to 2.7.6. This suggests that the changes are most likely focused on improvements or bug fixes within the single-file component compiler. Developers heavily reliant on single-file components (SFCs) might find updating beneficial, particularly if they've encountered issues related to compilation or template handling in the previous version. The unpacked size is also slightly different (4519081 vs 4518827), indicating minor code changes. The release date delta is also small, slightly more than 2 days. For most Vue 2 users, the upgrade should be seamless. It is always recommended to check the official Vue changelog for detailed information about the specific fixes included in this patch. All other dependencies and devDependencies remain identical between the two.
All the vulnerabilities related to the version 2.7.6 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.