EUVD-2023-30802

Comprehensive Technical Analysis of EUVD-2023-30802

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2023-30802, also known as CVE-2023-27012, pertains to a stack overflow in the setSchedWifi function within the Tenda AC10 router firmware version US_AC10V4.0si_V16.03.10.13_cn. This vulnerability is severe, with a CVSS Base Score of 9.8, indicating a critical risk. 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:N): Network, meaning the vulnerability can be exploited remotely.
• Attack Complexity (AC:L): Low, indicating that the attack is relatively straightforward to execute.
• Privileges Required (PR:N): None, meaning no special privileges are needed to exploit the vulnerability.
• User Interaction (UI:N): None, indicating that no user interaction is required.
• Scope (S:U): Unchanged, meaning the vulnerability does not affect other systems beyond the initial target.
• Confidentiality (C:H): High, indicating that the vulnerability can lead to a significant breach of confidentiality.
• Integrity (I:H): High, indicating that the vulnerability can lead to a significant breach of integrity.
• Availability (A:H): High, indicating that the vulnerability can lead to a significant breach of availability.

2. Potential Attack Vectors and Exploitation Methods

The stack overflow vulnerability in the setSchedWifi function can be exploited through crafted payloads sent to the router. Potential attack vectors include:

• Remote Exploitation: An attacker can send specially crafted packets to the router over the network, leading to a Denial of Service (DoS) or arbitrary code execution.
• Local Network Attacks: Devices within the same local network can exploit this vulnerability to compromise the router.
• Phishing and Social Engineering: Attackers could trick users into visiting malicious websites or downloading malicious files that exploit this vulnerability.

3. Affected Systems and Software Versions

The vulnerability specifically affects the Tenda AC10 router with the firmware version US_AC10V4.0si_V16.03.10.13_cn. Other versions of the Tenda AC10 router firmware may also be affected, but this has not been confirmed. It is advisable to check for updates and patches from the vendor.

4. Recommended Mitigation Strategies

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

• Firmware Update: Immediately update the router firmware to the latest version provided by Tenda.
• Network Segmentation: Implement network segmentation to isolate critical systems and reduce the attack surface.
• Firewall Configuration: Configure firewalls to restrict access to the router's management interface.
• 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 European cybersecurity, particularly for organizations and individuals using the affected Tenda AC10 routers. The potential for remote exploitation and arbitrary code execution can lead to data breaches, service disruptions, and unauthorized access to sensitive information. 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 overflow in the setSchedWifi function.
• Exploitation: The vulnerability can be triggered by sending a crafted payload to the router, leading to a buffer overflow.
• Detection: Monitor network traffic for unusual patterns or payloads targeting the setSchedWifi function.
• Mitigation: Ensure that the router firmware is updated to the latest version. Implement network security measures such as firewalls, IDS, and regular security audits.
• References: For further details, refer to the GitHub repository: Tenda AC10 Vulnerability.

Conclusion

EUVD-2023-30802 is a critical vulnerability affecting the Tenda AC10 router firmware. The stack overflow in the setSchedWifi function can lead to DoS attacks or arbitrary code execution, posing a significant risk to network security. Immediate mitigation strategies, including firmware updates and network security measures, are essential to protect against potential exploitation. The European cybersecurity landscape must remain vigilant and proactive in addressing such vulnerabilities to safeguard against cyber threats.