EUVD-2024-35378

Comprehensive Technical Analysis of EUVD-2024-35378

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-35378, also known as CVE-2024-35580, pertains to a stack overflow in Tenda AX1806 v1.0.0.1. The stack overflow occurs via the adv.iptv.stbpvid parameter in the function formSetIptv. This vulnerability has a CVSS Base Score of 9.8, indicating 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 special privileges are needed 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) - The vulnerability can lead to a complete breach of confidentiality.
• Integrity (I): High (H) - The vulnerability can lead to a complete breach of integrity.
• Availability (A): High (H) - The vulnerability can lead to a complete breach of availability.

2. Potential Attack Vectors and Exploitation Methods

The stack overflow vulnerability can be exploited through the following methods:

• Remote Code Execution (RCE): An attacker can send a specially crafted request to the formSetIptv function, causing a stack overflow and potentially executing arbitrary code.
• Denial of Service (DoS): By sending a malformed request, an attacker can crash the device, leading to a denial of service.
• Data Exfiltration: The vulnerability can be used to exfiltrate sensitive data from the device.

3. Affected Systems and Software Versions

The vulnerability specifically affects Tenda AX1806 v1.0.0.1. It is crucial to note that other versions of the Tenda AX1806 firmware may also be affected if they share the same codebase. 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 steps are recommended:

• Firmware Update: Ensure that the Tenda AX1806 device is running the latest firmware version. Tenda should release a patch to address this vulnerability.
• Network Segmentation: Implement network segmentation to isolate critical systems and reduce the attack surface.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor network traffic for suspicious activities that may indicate an exploitation attempt.
• Access Controls: Implement strict access controls to limit who can access and configure the device.
• 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 Tenda AX1806 device. Given the critical nature of the vulnerability, it could be exploited to compromise network security, leading to data breaches, service disruptions, and potential financial losses. The European Union's cybersecurity frameworks, such as the NIS Directive and GDPR, emphasize the importance of timely vulnerability management and incident response. Organizations must comply with these regulations to ensure the protection of sensitive data and critical infrastructure.

6. Technical Details for Security Professionals

For security professionals, the following technical details are essential:

• Vulnerable Parameter: The adv.iptv.stbpvid parameter in the formSetIptv function is the entry point for the stack overflow.
• Exploitation Technique: The stack overflow can be triggered by sending a specially crafted HTTP request to the device. The request should contain a payload that exceeds the buffer size allocated for the adv.iptv.stbpvid parameter.
• Detection Methods: Security professionals can use static and dynamic analysis tools to detect stack overflow vulnerabilities. Tools like IDA Pro, Ghidra, and fuzzing frameworks can be employed to analyze the firmware and identify similar issues.
• Patch Analysis: Once a patch is released, security professionals should conduct a thorough analysis to ensure that the vulnerability has been adequately addressed and that no new vulnerabilities have been introduced.

In conclusion, EUVD-2024-35378 is a critical vulnerability that requires immediate attention from both Tenda and the users of the affected device. Proactive measures, including firmware updates, network segmentation, and regular security audits, are essential to mitigate the risk and protect against potential exploitation.