EUVD-2024-53629

Comprehensive Technical Analysis of EUVD-2024-53629

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-53629 affects Tenda AC18 V15.03.05.19, specifically involving a stack overflow in the devName parameter within the formSetDeviceName function. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): None (N) - No privileges are required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - Complete loss of confidentiality.
• Integrity (I): High (H) - Complete loss of integrity.
• Availability (A): High (H) - Complete loss of availability.

Given these metrics, the vulnerability poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The stack overflow vulnerability can be exploited by sending a specially crafted request to the formSetDeviceName function with an overly long devName parameter. This can lead to arbitrary code execution, allowing attackers to:

• Execute Remote Code: Gain control over the device and execute malicious code.
• Data Exfiltration: Access and exfiltrate sensitive information.
• Denial of Service (DoS): Cause the device to crash or become unresponsive.

Attackers can leverage this vulnerability to compromise the device and potentially use it as a pivot point for further attacks within the network.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Tenda AC18: Firmware version V15.03.05.19

Other versions of the Tenda AC18 firmware may also be affected, but this has not been confirmed. Users and administrators should verify the firmware version and apply updates as necessary.

4. Recommended Mitigation Strategies

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

• Firmware Update: Immediately update the firmware to a version that addresses this vulnerability.
• Network Segmentation: Isolate the affected devices from critical network segments to limit potential lateral movement.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity targeting the formSetDeviceName function.
• Access Controls: Implement strict access controls to limit who can interact with the device's management interface.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant threat to the European cybersecurity landscape, particularly for organizations and individuals using Tenda AC18 devices. The potential for remote code execution and data exfiltration can lead to severe breaches, affecting confidentiality, integrity, and availability of data. This underscores the importance of timely patch management and proactive security measures.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerable Function: formSetDeviceName
• Vulnerable Parameter: devName
• Exploitation Method: Craft a request with an overly long devName parameter to trigger the stack overflow.
• Detection: Monitor network traffic for unusual patterns targeting the formSetDeviceName function. Implement logging and alerting mechanisms for suspicious activities.
• Patching: Ensure that the firmware update process is secure and verify the integrity of the update files.

Conclusion

EUVD-2024-53629 represents a critical vulnerability in Tenda AC18 V15.03.05.19, necessitating immediate attention from cybersecurity professionals. By understanding the attack vectors, affected systems, and mitigation strategies, organizations can effectively protect against potential exploitation and maintain the integrity of their networks. Regular updates, network segmentation, and proactive monitoring are essential components of a robust security posture in the face of such vulnerabilities.