Vue 2.7.8 represents a minor update to the widely used Vue.js framework, building upon the foundation laid by version 2.7.7, a late but important update of previous Vue 2 versions. Both versions maintain the core description of being a reactive, component-oriented view layer suitable for crafting modern web interfaces.
A primary difference lies in the updated dependency on @vue/compiler-sfc, which jumps from version 2.7.7 to 2.7.8. This suggests improvements or bug fixes within the single-file component compiler itself, potentially impacting how Vue components are processed and rendered. Developers leveraging single-file components should be aware of this change, as it could resolve existing issues or introduce subtle alterations in behavior of the build process.
The file sizes in the dist field reveal a slight increase in unpackedSize from 4524803 to 4535953 meaning that there are about 12KB of changes if we calculate the difference.
Beyond the core compilation, the extensive list of devDependencies remains consistent, indicating stability in the tooling ecosystem surrounding Vue. This includes crucial tools like Rollup for bundling, Terser for minification, and testing frameworks like Vitest and Karma, ensuring a smooth development experience. The consistent releaseDate cadence, roughly a week apart, implies a focused effort on incremental improvements and bug fixes within the Vue 2 lifecycle. Developers can confidently upgrade to 2.7.8 knowing that the core development workflow and compatibility with existing tools are preserved while reaping the benefits of the compiler improvements.
All the vulnerabilities related to the version 2.7.8 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.