Vue version 2.5.9 is a minor update to the popular JavaScript framework, succeeding version 2.5.8. This update enhances the developer experience building user interfaces emphasizing reactive components. While core functionalities remain consistent, the key difference lies in the updated dependencies, particularly in the "devDependencies" section. Most of the core dependencies and development tools versions were kept in sync.
A notable upgrade is the TypeScript version, moving from 2.5.2 in 2.5.8 to 2.6.1 in 2.5.9. This brings improvements and potentially new features and bug fixes provided by the TypeScript compiler, which will benefit developers who use Vue with TypeScript. The release date difference is also notable, with version 2.5.9 being released just under a week after 2.5.8, suggesting that the update might address some immediate issues that were found right after the release of the previous version or include some recently available feature. Besides this, this new version is compatible with all the old plugins and tools, making it easier to upgrade to the newest one. This constant support and focus on developer tools make Vue a good choice for modern web development.
All the vulnerabilities related to the version 2.5.9 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.