CVE-2024-21798: ELECOM Wireless LAN Routers Cross-site Scripting Vulnerability

ELECOM wireless LAN routers have recently been found to contain a cross-site scripting (XSS) vulnerability. This issue, which is tracked under the identification number CVE-2024-21798, has the potential to be exploited by a malicious administrative user that configures the affected router product using specially crafted content. Once this happens, any other administrative user that logs in and operates the product might unknowingly execute an arbitrary script on their web browser, which could result in compromised security and unauthorized access to sensitive information.

Exploit Details

Below is a code snippet that demonstrates how the XSS vulnerability in the affected ELECOM routers could be exploited by a malicious user:

<script>
$(document).ready(function() {
    var malicious_content = "<script>alert('XSS vulnerability exploited!');</script>";
    $("#router_config").html(malicious_content);
});
</script>

Using this script, a malicious attacker can insert their own content (in this example, an alert message) that would be executed on the web browser of another administrative user when they log in and operate the router.

For more information regarding this vulnerability, please refer to the following resources

1. CVE-2024-21798 on the CVE List
2. ELECOM official announcement of the vulnerability

Mitigation

ELECOM has not yet released a patch or update to address this vulnerability. However, to mitigate the risk of potential exploitation, users should strictly limit access to the administrative controls of their routers, particularly to only trusted individuals. In addition, users are advised to maintain a heightened awareness of any suspicious activity on their networks and report any issues immediately.

Conclusion

The CVE-2024-21798 vulnerability in ELECOM wireless LAN routers poses a significant security risk, as it allows a malicious administrative user to potentially execute arbitrary scripts on the web browsers of other users. Users of affected products and versions should take necessary precautions to protect their networks and maintain the security of their routers until a patch or update is made available.

Timeline

Published on: 02/28/2024 23:15:09 UTC
Last modified on: 04/04/2024 01:15:49 UTC