CVE-2024-46046

Comprehensive Technical Analysis of CVE-2024-46046

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-46046 CISA Vulnerability Name: CVE-2024-46046 Description: Tenda FH451 v1.0.0.9 has a stack overflow vulnerability located in the RouteStatic function. CVSS Score: 9.8

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 over the network, potentially without requiring authentication.
• Local Exploitation: If an attacker has local access to the device, they could exploit the vulnerability to escalate privileges or execute arbitrary code.

Exploitation Methods:

• Crafted Packets: An attacker could send specially crafted packets to the RouteStatic function, causing a stack overflow.
• Buffer Overflow: By sending a large amount of data to the RouteStatic function, an attacker could overwrite the stack and execute malicious code.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda FH451 routers running firmware version v1.0.0.9.

Software Versions:

• Firmware version v1.0.0.9 is specifically mentioned as vulnerable. Other versions may also be affected but have not been explicitly identified in the CVE.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Upgrade to a patched version of the firmware as soon as it becomes available.
• Network Segmentation: Isolate the affected devices from critical networks to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the RouteStatic function.

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 related to this vulnerability.
• Security Audits: Conduct regular security audits to identify and mitigate similar vulnerabilities.

5. Impact on Cybersecurity Landscape

The discovery of this vulnerability highlights the ongoing risk posed by unpatched firmware in IoT devices. The high CVSS score underscores the potential for significant damage, including data breaches, service disruptions, and unauthorized access. This vulnerability serves as a reminder of the importance of robust security practices, including regular updates and proactive monitoring.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: RouteStatic
• Type of Vulnerability: Stack Overflow
• Exploitation: The vulnerability can be triggered by sending a large amount of data to the RouteStatic function, causing a buffer overflow and potentially leading to remote code execution.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the RouteStatic function.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalies in network traffic that may indicate an exploitation attempt.
• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.

References:

• Exploit and Third Party Advisory

Conclusion: CVE-2024-46046 represents a critical vulnerability in Tenda FH451 routers that requires immediate attention. Organizations should prioritize updating affected devices and implementing robust security measures to mitigate the risk. Continuous monitoring and proactive security practices are essential to protect against similar threats in the future.