A cross-site request forgery (CSRF) vulnerability has been discovered in ELECOM wireless LAN routers, which allows a remote unauthenticated attacker to hijack the authentication of administrators and perform unintended operations to the affected product. This critical security vulnerability affects multiple ELECOM wireless LAN router models and firmware versions, as detailed in this article.

Introduction

In this in-depth post, we will discuss the recently discovered cross-site request forgery (CSRF) vulnerability found in ELECOM wireless LAN routers, identified as CVE-2024-23910. The exploit allows a remote attacker to hijack administrator authentication without their knowledge, giving unauthorized access and control over the affected product. We will explore the affected products and versions, code snippets demonstrating the vulnerability, links to original references, and the details of the exploit itself.

Code snippet demonstrating the vulnerability

Here's an example demonstrating the vulnerability. An attacker can create a malicious HTML file containing an iframe that triggers a request to the targeted router's admin interface with properly crafted parameters:

<!DOCTYPE html>
<html>
<head>
  <title>CSRF Exploit</title>
</head>
<body>
  <iframe src="https://<router_ip>/cgi-bin/admin.cgi?&method=POST&p1=val1&p2=val2..."; width="" height=""></iframe>
</body>
</html>

Upon the administrator opening the malicious HTML file in their web browser, the embedded iframe will send a request to the router's admin interface, executing the attacker's desired action without the administrator's knowledge or consent.

Original References

The original references and advisories on the discovery of CVE-2024-23910 can be found in the following links:

1. ELECOM Security Advisory
2. Official CVE-2024-23910 Details
3. National Vulnerability Database (NVD) Listing

Exploit Details

The attacker exploits the CSRF vulnerability by creating a malicious page with specifically crafted requests to the router's administration interface. To do this, the attacker needs to know the router's IP address, which can be easily acquired through various means. Once the IP address is known, they can create and host a malicious page that, when visited by the administrator, exploits the router's CSRF vulnerability and allows the attacker to perform unauthorized actions on the router.

Mitigation

To protect against exploitation of this vulnerability, users are advised to update their ELECOM wireless LAN router's firmware to the latest version available from the manufacturer. Additionally, users should be cautious when clicking on links, opening attachments, or visiting unfamiliar websites, as these actions may lead to unintentionally exposing the administrator's session to an attacker.

Conclusion

The discovery and detailed analysis of CVE-2024-23910 reveal a critical CSRF vulnerability in ELECOM wireless LAN routers that permits a remote attacker to hijack administrator authentication. Administrators are urged to update their router's firmware to mitigate the risk of exploitation and to remain vigilant in their browsing and internet usage habits, thus reducing the possibility of encountering CSRF attacks.

Timeline

Published on: 02/28/2024 23:15:09 UTC
Last modified on: 04/04/2024 01:15:50 UTC