CVE-2025-55613

Comprehensive Technical Analysis of CVE-2025-55613

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-55613 Description: Tenda O3V2 1.0.0.12(3880) is vulnerable to Buffer Overflow in the fromSafeSetMacFilter function via the mac parameter. CVSS Score: 9.8

Severity Evaluation: The CVSS score of 9.8 indicates a critical vulnerability. This high score is likely due to the potential for remote code execution, the ease of exploitation, and the significant impact on the confidentiality, integrity, and availability of the affected system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker could exploit this vulnerability remotely by sending a specially crafted request to the fromSafeSetMacFilter function with an overly long mac parameter.
• Network-Based Attacks: Given that the Tenda O3V2 is a network device, attackers could leverage this vulnerability to compromise the device over the network.

Exploitation Methods:

• Buffer Overflow: The attacker can send a maliciously crafted mac parameter that exceeds the buffer size allocated for it. This can lead to overwriting adjacent memory, potentially allowing for arbitrary code execution.
• Code Injection: By carefully crafting the payload, an attacker could inject and execute malicious code on the device, leading to full control over the device.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda O3V2 devices running firmware version 1.0.0.12(3880).

Software Versions:

• Specifically, the vulnerability is present in the fromSafeSetMacFilter function of the firmware version 1.0.0.12(3880).

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Network Segmentation: Isolate the affected devices on a separate network segment to limit exposure.
• Firewall Rules: Implement strict firewall rules to restrict access to the device, allowing only trusted IP addresses.
• Monitoring: Increase monitoring and logging for any suspicious activities targeting the device.

Long-Term Mitigation:

• Firmware Update: Apply the latest firmware update from Tenda as soon as it becomes available.
• Patch Management: Implement a robust patch management process to ensure timely updates and patches for all network devices.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues proactively.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Supply Chain Security: This vulnerability highlights the importance of securing the supply chain, as network devices are critical components in many organizations' infrastructure.
• IoT Security: With the increasing adoption of IoT devices, vulnerabilities like this underscore the need for enhanced security measures in IoT ecosystems.
• Remote Workforce: As remote work continues to grow, securing network devices becomes even more critical to prevent unauthorized access and data breaches.

Industry Response:

• Vendor Responsibility: Vendors must prioritize security in their product development lifecycle and provide timely updates and patches.
• Cybersecurity Awareness: Organizations need to be more vigilant about cybersecurity threats and invest in training and awareness programs for their IT staff.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: fromSafeSetMacFilter
• Parameter: mac
• Type of Vulnerability: Buffer Overflow

Exploitation Steps:

1. Identify Target: Locate the Tenda O3V2 device on the network.
2. Craft Payload: Create a payload that exceeds the buffer size for the mac parameter.
3. Send Request: Send the crafted request to the fromSafeSetMacFilter function.
4. Execute Code: If successful, the payload will overwrite adjacent memory, allowing for code execution.

Detection and Response:

• Intrusion Detection Systems (IDS): Deploy IDS to detect unusual traffic patterns targeting the device.
• Incident Response Plan: Have a well-defined incident response plan in place to quickly address any detected exploitation attempts.
• Log Analysis: Regularly analyze logs for any anomalies that could indicate an attempted or successful exploitation.

Conclusion: CVE-2025-55613 represents a critical vulnerability that requires immediate attention from cybersecurity professionals. By understanding the technical details and implementing the recommended mitigation strategies, organizations can significantly reduce the risk associated with this vulnerability. Continuous monitoring and proactive security measures are essential to safeguard against such threats in the evolving cybersecurity landscape.