EUVD-2023-41589

Comprehensive Technical Analysis of EUVD-2023-41589

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2023-41589, also known as CVE-2023-37712, affects specific versions of Tenda AC1206, F1202, and FH1202 devices. The issue is a stack overflow in the page parameter within the fromSetIpBind function. 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 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 does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability can result in a complete loss of confidentiality.
• Integrity (I): High (H) - The vulnerability can result in a complete loss of integrity.
• Availability (A): High (H) - The vulnerability can result in a complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

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

• Remote Code Execution (RCE): An attacker could send specially crafted network packets to the affected devices, causing a stack overflow and potentially executing arbitrary code.
• Denial of Service (DoS): The stack overflow could be exploited to crash the device, leading to a denial of service.
• Information Disclosure: The vulnerability might allow an attacker to read sensitive information from the device's memory.

Exploitation methods could involve crafting malicious HTTP requests targeting the fromSetIpBind function with a carefully constructed page parameter to trigger the stack overflow.

3. Affected Systems and Software Versions

The vulnerability affects the following Tenda devices and firmware versions:

• Tenda AC1206 V15.03.06.23
• Tenda F1202 V1.2.0.20(408)
• Tenda FH1202 V1.2.0.20(408)

4. Recommended Mitigation Strategies

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

• Firmware Update: Ensure that all affected devices are updated to the latest firmware version provided by Tenda. Regularly check for updates and apply them promptly.
• Network Segmentation: Isolate affected devices on a separate network segment to limit the potential impact of an exploit.
• Firewall Rules: Implement strict firewall rules to restrict access to the affected devices, allowing only trusted IP addresses.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor network traffic for suspicious activity that may indicate an attempt to exploit this vulnerability.
• 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 organizations and individuals using the affected Tenda devices. Given the critical nature of the vulnerability, successful exploitation could lead to:

• Data Breaches: Sensitive information could be compromised, leading to data breaches and potential regulatory violations.
• Service Disruptions: Critical services relying on the affected devices could be disrupted, impacting business operations.
• Reputation Damage: Organizations experiencing a breach due to this vulnerability could face reputational damage and loss of customer trust.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerability Type: Stack overflow in the page parameter within the fromSetIpBind function.
• Affected Function: fromSetIpBind
• Exploitability: The vulnerability can be exploited remotely with low complexity, requiring no special privileges or user interaction.
• References: For further technical details, refer to the GitHub repository: FirmRec/IoT-Vulns/tree/main/tenda/fromSetIpBind

Conclusion

EUVD-2023-41589 is a critical vulnerability affecting specific Tenda devices. Organizations and individuals using these devices 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.