Vue 2.7.4 is a patch release in the Vue 2 series, following shortly after version 2.7.3. Both versions serve as reactive, component-oriented view layers ideal for crafting modern web interfaces, and share the same core description and functionality, targeting developers seeking a robust and flexible framework. Both rely on dependencies such as csstype and @vue/compiler-sfc, with matching versions except for the latter, reflecting the patch nature of the update. The development dependencies also remain consistent between the two versions, including tools like rollup for bundling, terser for minification, and various testing and linting utilities showing a shared development workflow for both versions.
The primary distinction lies in the subtle internal changes and bug fixes incorporated in version 2.7.4. Details of these changes are not provided in the metadata, but generally patch releases address minor bugs, performance improvements, and security enhancements without introducing breaking changes. Developers upgrading from 2.7.3 to 2.7.4 can expect a smoother or more stable experience. Although the core functionality remains essentially identical, the updated @vue/compiler-sfc dependency hints at refinements in single-file component compilation within version 2.7.4. Other differences are fileCount and unpackedSize from the dist section.
All the vulnerabilities related to the version 2.7.4 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.