EUVD-2023-28404

Comprehensive Technical Analysis of EUVD-2023-28404

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2023-28404, also known as CVE-2023-24348, pertains to a stack overflow in the D-Link N300 WI-FI Router DIR-605L v2.13B01. The stack overflow occurs via the curTime parameter at the /goform/formSetACLFilter endpoint. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• AV:N (Attack Vector: Network): The vulnerability is exploitable over the network.
• AC:L (Attack Complexity: Low): The attack requires low complexity to exploit.
• PR:N (Privileges Required: None): No privileges are required to exploit the vulnerability.
• UI:N (User Interaction: None): No user interaction is required.
• S:U (Scope: Unchanged): The vulnerability does not change the security scope.
• C:H (Confidentiality: High): The vulnerability has a high impact on confidentiality.
• I:H (Integrity: High): The vulnerability has a high impact on integrity.
• A:H (Availability: High): The vulnerability has a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The stack overflow vulnerability can be exploited by sending a specially crafted request to the /goform/formSetACLFilter endpoint with a malicious curTime parameter. This can lead to arbitrary code execution, allowing an attacker to gain control over the affected device. Potential attack vectors include:

• Remote Exploitation: An attacker can exploit the vulnerability over the network without needing physical access to the device.
• Automated Attacks: Given the low complexity, automated scripts can be used to scan for and exploit vulnerable devices.
• Man-in-the-Middle (MitM) Attacks: An attacker could intercept and modify network traffic to exploit the vulnerability.

3. Affected Systems and Software Versions

The vulnerability specifically affects the D-Link N300 WI-FI Router DIR-605L running firmware version v2.13B01. Other versions of the firmware or different models may also be affected, but this has not been confirmed. Users and administrators should verify the firmware version of their devices to determine if they are at risk.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Firmware Update: Immediately update the firmware to the latest version provided by D-Link. Ensure that the update process is secure and verified.
• Network Segmentation: Isolate the affected devices on a separate network segment to limit potential attack vectors.
• Firewall Rules: Implement strict firewall rules to restrict access to the /goform/formSetACLFilter endpoint.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity and potential exploitation attempts.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for home and small business users who rely on consumer-grade routers. The potential for remote exploitation and the high impact on confidentiality, integrity, and availability make it a critical concern. Organizations and individuals should prioritize updating their devices and implementing robust security measures to protect against potential attacks.

6. Technical Details for Security Professionals

• Vulnerability Type: Stack Overflow
• Affected Parameter: curTime
• Endpoint: /goform/formSetACLFilter
• Exploitation Method: Sending a specially crafted request to the affected endpoint can trigger the stack overflow, leading to arbitrary code execution.
• Detection: Monitor network traffic for unusual patterns or requests targeting the /goform/formSetACLFilter endpoint. Implement logging and alerting mechanisms to detect and respond to potential exploitation attempts.
• Patching: Ensure that the firmware update process is secure and that the update is obtained from a trusted source. Verify the integrity of the firmware update before applying it.

Conclusion

EUVD-2023-28404 is a critical vulnerability affecting the D-Link N300 WI-FI Router DIR-605L v2.13B01. The stack overflow can be exploited remotely with low complexity, posing a significant risk to affected devices. Immediate action, including firmware updates and robust security measures, is essential to mitigate the risk and protect against potential attacks. Security professionals should remain vigilant and proactive in addressing this vulnerability to safeguard the European cybersecurity landscape.