CVE-2025-25676

Comprehensive Technical Analysis of CVE-2025-25676

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-25676 Description: Tenda i12 V1.0.0.10(3805) contains a buffer overflow vulnerability in the list parameter of the formwrlSSIDset function. 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 confidentiality, integrity, and availability.

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 device.
• Network-Based Attacks: Given that the Tenda i12 is a wireless router, attackers could leverage this vulnerability over the network, potentially affecting all devices connected to it.

Exploitation Methods:

• Buffer Overflow: By sending a maliciously crafted list parameter to the formwrlSSIDset function, an attacker can cause a buffer overflow. This could lead to arbitrary code execution, allowing the attacker to take control of the device.
• Denial of Service (DoS): Even if code execution is not achieved, the buffer overflow could crash the device, leading to a DoS condition.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda i12 wireless router

Software Versions:

• Firmware version V1.0.0.10(3805)

Note: Other versions of the firmware may also be affected, but this has not been confirmed. Users should check for updates and patches from the vendor.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Users should immediately update to the latest firmware version provided by Tenda.
• Network Segmentation: Isolate the affected device from critical networks to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the device's management interface.

Long-Term Strategies:

• Regular Patching: Establish a regular patching schedule to ensure all devices are up-to-date.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity that may indicate an exploitation attempt.
• Security Audits: Conduct regular security audits to identify and mitigate vulnerabilities proactively.

5. Impact on Cybersecurity Landscape

Broader Implications:

• IoT Security: This vulnerability highlights the ongoing challenges in securing Internet of Things (IoT) devices, which are often deployed in large numbers and can be difficult to update.
• Supply Chain Risks: Vulnerabilities in widely used devices can have cascading effects, impacting both consumers and businesses.
• Remote Workforce: With the increase in remote work, the security of home routers and other network devices has become critical.

Industry Response:

• Vendor Responsibility: Vendors must prioritize security in their product development lifecycle and provide timely updates.
• Consumer Awareness: Increased awareness among consumers about the importance of updating and securing their devices.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: formwrlSSIDset
• Parameter: list
• Issue: Buffer overflow due to insufficient bounds checking on the list parameter.

Exploitation Steps:

1. Identify Target: Locate the Tenda i12 router on the network.
2. Craft Payload: Create a payload that exceeds the buffer size for the list parameter.
3. Send Request: Send the crafted request to the device's management interface.
4. Execute Code: If successful, the attacker can execute arbitrary code on the device.

Detection and Monitoring:

• Log Analysis: Monitor logs for unusual activity related to the formwrlSSIDset function.
• Anomaly Detection: Use anomaly detection tools to identify abnormal traffic patterns that may indicate an exploitation attempt.

Conclusion: CVE-2025-25676 represents a significant risk to users of the Tenda i12 router. Immediate mitigation steps, including firmware updates and network segmentation, are essential. Long-term, this vulnerability underscores the need for robust security practices in IoT device management and the importance of vendor responsibility in securing their products.

References:

• GitHub Repository (Note: The link is currently broken, but it may contain additional technical details once restored.)

This analysis provides a comprehensive overview for cybersecurity professionals to understand and mitigate the risks associated with CVE-2025-25676.