EUVD-2023-29196

Comprehensive Technical Analysis of EUVD-2023-29196

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2023-29196 affects the Tenda AC500 V2.0.1.9(1307) router, specifically in the function fromRouteStatic via the parameters entrys and mitInterface. This vulnerability is classified as a Buffer Overflow, which is a critical type of security flaw. The Base Score of 9.8, according to CVSS v3.1, indicates a high 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 special privileges are needed to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability can lead to a significant breach of confidentiality.
• Integrity (I): High (H) - The vulnerability can lead to a significant breach of integrity.
• Availability (A): High (H) - The vulnerability can lead to a significant breach of availability.

2. Potential Attack Vectors and Exploitation Methods

Given the nature of the vulnerability, potential attack vectors include:

• Remote Exploitation: An attacker can exploit this vulnerability over the network without needing physical access to the device.
• Buffer Overflow: By sending specially crafted packets or data to the fromRouteStatic function, an attacker can cause a buffer overflow, leading to arbitrary code execution or a denial of service (DoS).
• Man-in-the-Middle (MitM) Attacks: The parameters entrys and mitInterface could be manipulated in transit, leading to unauthorized access or data manipulation.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Tenda AC500 V2.0.1.9(1307)

Other versions of the Tenda AC500 router 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: Ensure that the router firmware is updated to the latest version provided by Tenda. Regularly check for updates and apply them promptly.
• 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 from untrusted networks.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor network traffic for suspicious activities that may indicate an exploitation attempt.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security weaknesses.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations and individuals using the affected Tenda AC500 router. Given the high severity score, successful exploitation could lead to:

• Data Breaches: Unauthorized access to sensitive information.
• Service Disruption: Denial of service attacks leading to network downtime.
• Compromised Networks: Attackers gaining control over network devices, potentially leading to further attacks within the network.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerability Type: Buffer Overflow
• Affected Function: fromRouteStatic
• Parameters: entrys, mitInterface
• Exploitation: Crafted packets or data can cause a buffer overflow, leading to code execution or DoS.
• Detection: Monitor network traffic for unusual patterns or anomalies that may indicate an exploitation attempt. Use tools like Wireshark for packet analysis.
• Mitigation: Implement strict input validation and sanitization for network traffic. Use secure coding practices to prevent buffer overflows in future software development.

Conclusion

EUVD-2023-29196 is a critical vulnerability affecting the Tenda AC500 router. Organizations and individuals using this device should prioritize updating their firmware and implementing robust security measures to mitigate the risk. The European cybersecurity landscape must remain vigilant against such vulnerabilities to protect against potential data breaches and service disruptions.

References

• GitHub Repository
• Aliases: CVE-2023-25233, GSD-2023-25233
• Assigner: Mitre

For further updates and detailed information, refer to the official EUVD entry and associated references.