EUVD-2024-34423

Comprehensive Technical Analysis of EUVD-2024-34423

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-34423, also known as CVE-2024-21797, is a command execution vulnerability in the adm.cgi set_TR069() functionality of the Wavlink AC3000 M33A8.V5030.210505 firmware. This vulnerability allows an attacker to execute arbitrary commands on the affected device by sending a specially crafted HTTP request. The CVSS Base Score of 9.1 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low complexity to execute.
• PR:H (High Privileges Required): The attacker needs high privileges to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required.
• S:C (Changed Scope): The vulnerability affects a different security scope.
• C:H (High Confidentiality Impact): The vulnerability can lead to a high impact on confidentiality.
• I:H (High Integrity Impact): The vulnerability can lead to a high impact on integrity.
• A:H (High Availability Impact): The vulnerability can lead to a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves sending a specially crafted HTTP request to the adm.cgi endpoint of the Wavlink AC3000 device. Given that the attacker needs to be authenticated, the following steps could be involved:

1. Credential Acquisition: The attacker must obtain valid credentials for the device. This could be achieved through brute-force attacks, social engineering, or exploiting other vulnerabilities.
2. Crafting the HTTP Request: The attacker crafts an HTTP request that exploits the vulnerability in the set_TR069() function.
3. Command Execution: The crafted request is sent to the device, leading to arbitrary command execution.

3. Affected Systems and Software Versions

The vulnerability specifically affects the Wavlink AC3000 device running firmware version M33A8.V5030.210505. Other versions of the firmware may also be affected, but this has not been confirmed.

4. Recommended Mitigation Strategies

1. Firmware Update: Immediately update the firmware to a version that addresses this vulnerability. If an update is not available, contact the vendor for a patch.
2. Network Segmentation: Isolate the affected devices on a separate network segment to limit the attack surface.
3. Access Control: Implement strict access controls and use strong, unique passwords for device authentication.
4. Monitoring and Logging: Enable comprehensive logging and monitoring to detect any suspicious activity.
5. Firewall Rules: Implement firewall rules to restrict access to the adm.cgi endpoint to trusted IP addresses only.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations and individuals using the Wavlink AC3000 device. Given the critical nature of the vulnerability, it could be exploited to gain unauthorized access, exfiltrate data, or disrupt services. This underscores the importance of timely patch management and robust cybersecurity practices within the European Union.

6. Technical Details for Security Professionals

• Vulnerability Type: Command Execution
• Affected Component: adm.cgi set_TR069() function
• Exploitation Method: Authenticated HTTP request
• Impact: Arbitrary command execution leading to potential data breaches, system compromise, and service disruption.
• Detection: Monitor for unusual HTTP requests to the adm.cgi endpoint and any unexpected command execution on the device.
• Mitigation: Apply firmware updates, enforce strong authentication, and implement network segmentation.

Conclusion

EUVD-2024-34423 is a critical vulnerability that requires immediate attention from organizations and individuals using the Wavlink AC3000 device. By following the recommended mitigation strategies and staying vigilant, the risk can be significantly reduced. Continuous monitoring and prompt response to any suspicious activity are essential to maintaining a robust cybersecurity posture.

References

• Talos Intelligence Vulnerability Report
• ENISA Product ID
• ENISA Vendor ID