CVE-2025-44899

Comprehensive Technical Analysis of CVE-2025-44899

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-44899 Description: The vulnerability involves a stack overflow in the fromSetWifiGusetBasic function of the web URL /goform/WifiGuestSet in Tenda RX3 V1.0br_V16.03.13.11. The manipulation of the parameter shareSpeed leads to a stack overflow, which can be exploited to execute arbitrary code or cause a denial of service (DoS).

CVSS Score: 9.8 Severity: Critical

The high CVSS score of 9.8 indicates that this vulnerability is extremely severe. It poses a significant risk to the integrity, confidentiality, and availability of the affected systems.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability remotely by sending a specially crafted HTTP request to the vulnerable endpoint.
• Network Access: The attacker needs network access to the Tenda RX3 device, which is typically accessible over the local network but can also be exposed to the internet if misconfigured.

Exploitation Methods:

• Buffer Overflow: By sending a maliciously crafted shareSpeed parameter, an attacker can overflow the stack buffer, leading to arbitrary code execution or a crash.
• Code Injection: An attacker can inject malicious code into the stack, which can be executed with the privileges of the web server process.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda RX3 routers running firmware version V1.0br_V16.03.13.11.

Software Versions:

• Specifically, the vulnerability is present in the firmware version V1.0br_V16.03.13.11. Other versions may also be affected but have not been explicitly mentioned.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Users should immediately update their Tenda RX3 routers to the latest firmware version provided by the vendor.
• Network Segmentation: Isolate the router from the internet and restrict access to trusted devices only.
• Firewall Rules: Implement strict firewall rules to limit access to the router's web interface.

Long-Term Strategies:

• Regular Patching: Establish a regular patching and update schedule for all network devices.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity.
• Security Audits: Conduct regular security audits and vulnerability assessments of network devices.

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 with minimal security features.
• Supply Chain Risks: It underscores the importance of supply chain security, as vulnerable devices can be exploited to compromise entire networks.
• Consumer Awareness: Increases the need for consumer awareness and education on the importance of updating and securing home network devices.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: fromSetWifiGusetBasic
• Parameter: shareSpeed
• Endpoint: /goform/WifiGuestSet

Exploitation Steps:

1. Identify Target: Locate the Tenda RX3 router on the network.
2. Craft Payload: Create a specially crafted HTTP request with a malicious shareSpeed parameter.
3. Send Request: Send the crafted request to the vulnerable endpoint.
4. Execute Code: If successful, the stack overflow will allow for arbitrary code execution.

Detection and Response:

• Log Analysis: Monitor web server logs for unusual activity or repeated requests to the /goform/WifiGuestSet endpoint.
• Anomaly Detection: Use anomaly detection tools to identify deviations from normal traffic patterns.
• Incident Response: Have an incident response plan in place to quickly address and mitigate any detected exploitation attempts.

References:

• GitHub Advisory

By addressing this vulnerability promptly and implementing robust security measures, organizations and individuals can significantly reduce the risk of exploitation and enhance the overall security posture of their networks.