Vue 2.7.9 is a minor version update to the popular JavaScript framework, Vue.js, building upon the previous stable release, version 2.7.8. Both versions offer a reactive, component-oriented view layer ideal for crafting modern web interfaces. Key dependencies like csstype remain consistent, ensuring type safety in CSS-related operations, and both leverage @vue/compiler-sfc for Single-File Component compilation, streamlining development workflows. Examining the dist properties, a subtle increase in fileCount (226 to 227) and unpackedSize (4535953 to 4551164 bytes) hints at internal modifications and potential bug fixes or performance improvements within the core library. The update was released on "2022-08-19" almost a month after the version "2.7.8" which was released in "2022-07-22".
For Vue.js developers, while the core functionalities remain largely unchanged, upgrading to 2.7.9 is recommended to benefit from the latest enhancements and address potential issues present in the prior version. Developers should always consult the official Vue.js changelog for a comprehensive list of specific changes, bug fixes, and potential breaking changes (though minor version updates typically avoid these). This iterative approach to development ensures a continuously refined and robust framework for building engaging user experiences. Considering the small changes in file count and size, the update likely focuses on internal optimizations rather than introducing new features.
All the vulnerabilities related to the version 2.7.9 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.