EUVD-2023-41588

Comprehensive Technical Analysis of EUVD-2023-41588

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2023-41588 pertains to a stack overflow in the deviceId parameter within the saveParentControlInfo function of Tenda AC1206 V15.03.06.23 and AC10 V15.03.06.47 devices. The Common Vulnerability Scoring System (CVSS) v3.1 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 can be exploited remotely 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 affects the same security scope.
• Confidentiality (C): High (H) - The vulnerability allows for significant unauthorized access to sensitive data.
• Integrity (I): High (H) - The vulnerability allows for significant unauthorized modification of data.
• Availability (A): High (H) - The vulnerability allows for significant disruption of service.

2. Potential Attack Vectors and Exploitation Methods

The stack overflow vulnerability can be exploited by sending a specially crafted request to the saveParentControlInfo function with a malicious deviceId parameter. This can lead to arbitrary code execution, allowing attackers to:

• Execute Remote Code: Gain control over the device and execute arbitrary commands.
• Data Exfiltration: Access and exfiltrate sensitive information stored on the device.
• Denial of Service (DoS): Cause the device to crash or become unresponsive, leading to service disruption.

3. Affected Systems and Software Versions

The vulnerability affects the following Tenda devices and firmware versions:

• Tenda AC1206: Firmware version V15.03.06.23
• Tenda AC10: Firmware version V15.03.06.47

4. Recommended Mitigation Strategies

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

• Firmware Update: Apply the latest firmware updates provided by Tenda. Ensure that the devices are running the most recent, patched versions.
• Network Segmentation: Isolate IoT devices from critical networks to limit the potential impact of an attack.
• Firewall Configuration: Implement strict firewall rules to restrict access to the vulnerable devices.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor network traffic for suspicious activities.
• 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 the European cybersecurity landscape, particularly for organizations and individuals using Tenda AC1206 and AC10 devices. The potential for remote code execution and data exfiltration can lead to severe consequences, including:

• Data Breaches: Unauthorized access to sensitive information.
• Service Disruption: Interruption of critical services and operations.
• Compliance Issues: Non-compliance with data protection regulations such as GDPR.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerable Function: saveParentControlInfo
• Vulnerable Parameter: deviceId
• Exploitation Method: Crafting a malicious request to trigger a stack overflow.
• References: Further technical details and proof-of-concept (PoC) exploits can be found at GitHub - FirmRec/IoT-Vulns.

Conclusion

EUVD-2023-41588 is a critical vulnerability affecting Tenda AC1206 and AC10 devices. The stack overflow in the saveParentControlInfo function can be exploited remotely with low complexity, leading to severe impacts on confidentiality, integrity, and availability. Organizations should prioritize firmware updates and implement robust security measures to mitigate the risk. The European cybersecurity community should remain vigilant and proactive in addressing such vulnerabilities to protect against potential cyber threats.