EUVD-2024-35121

Comprehensive Technical Analysis of EUVD-2024-35121

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-35121, also known as CVE-2024-34945, pertains to a stack-based buffer overflow in the Tenda FH1206 V1.2.0.8(8155)_EN firmware. This vulnerability is triggered via the PPW parameter at the ip/goform/WizardHandle 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:

• 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-based buffer overflow can be exploited by sending a specially crafted request to the ip/goform/WizardHandle endpoint with a malicious PPW parameter. This could lead to arbitrary code execution, allowing an attacker to:

• Execute Remote Code: Run malicious code on the affected device.
• Gain Unauthorized Access: Access sensitive information or control the device.
• Denial of Service (DoS): Crash the device, rendering it unavailable.

Potential attack vectors include:

• Network-Based Attacks: Exploiting the vulnerability over the network without requiring physical access.
• Automated Scripts: Using automated scripts to scan for and exploit vulnerable devices.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Tenda FH1206 V1.2.0.8(8155)_EN

Other versions of the Tenda FH1206 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: Apply the latest firmware update provided by Tenda. Ensure that the update process is secure and verified.
• Network Segmentation: Isolate affected devices on a separate network segment to limit potential attack vectors.
• Firewall Rules: Implement strict firewall rules to restrict access to the ip/goform/WizardHandle 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 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 FH1206 devices. The potential for remote code execution and unauthorized access can lead to data breaches, service disruptions, and other security incidents. 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:

• Vulnerability Type: Stack-based buffer overflow.
• Affected Endpoint: ip/goform/WizardHandle
• Malicious Parameter: PPW
• Exploitation Method: Crafting a malicious request to overflow the buffer and execute arbitrary code.
• Detection: Monitor network traffic for unusual patterns targeting the ip/goform/WizardHandle endpoint. Use tools like Snort or Suricata to create custom rules for detection.
• Response: Immediate patching and isolation of affected devices. Conduct a thorough investigation to determine the extent of the compromise and implement additional security controls.

Conclusion

EUVD-2024-35121 represents a critical vulnerability in the Tenda FH1206 firmware that requires immediate attention. Organizations should prioritize firmware updates, implement robust security controls, and conduct regular audits to mitigate the risk. The European cybersecurity community should remain vigilant and collaborate to address similar vulnerabilities proactively.

References

• EUVD Entry
• Mitre CVE Assigner

This analysis provides a comprehensive overview for cybersecurity professionals to understand and address the vulnerability effectively.