CVE-2023-47456

Comprehensive Technical Analysis of CVE-2023-47456

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-47456 CVSS Score: 9.1

The CVSS score of 9.1 indicates that this vulnerability is critical. The high score is likely due to the potential for remote code execution, which can lead to complete system compromise. The vulnerability is a stack overflow in the function sub_455D4, which is called by the function fromSetWirelessRepeat in Tenda AX1806 V1.0.0.1. Stack overflows can be exploited to execute arbitrary code, leading to severe security implications.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker could exploit this vulnerability over the network, especially if the device is exposed to the internet.
• Local Exploitation: An attacker with local network access could also exploit this vulnerability to gain control over the device.

Exploitation Methods:

• Crafted Input: An attacker could send specially crafted input to the fromSetWirelessRepeat function, causing a stack overflow in sub_455D4.
• Buffer Overflow: By overflowing the buffer, the attacker can inject malicious code, leading to arbitrary code execution.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AX1806 V1.0.0.1

Software Versions:

• Firmware version 1.0.0.1

It is crucial to identify all devices running this specific firmware version and apply the necessary patches or updates.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Management: Apply the latest firmware updates provided by Tenda.
• Network Segmentation: Isolate IoT devices from critical networks to limit the potential impact of an exploit.
• Firewall Rules: Implement strict firewall rules to restrict access to the device.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity.
• User Education: Educate users on the importance of updating firmware and the risks associated with unpatched devices.

5. Impact on Cybersecurity Landscape

The discovery of this vulnerability highlights the ongoing challenges in securing IoT devices. The high CVSS score underscores the potential for significant damage if exploited. This vulnerability serves as a reminder of the importance of robust security practices in the development and deployment of IoT devices.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: sub_455D4
• Calling Function: fromSetWirelessRepeat
• Type of Vulnerability: Stack Overflow

Exploitation Steps:

1. Identify Target: Locate devices running Tenda AX1806 V1.0.0.1.
2. Craft Payload: Develop a payload that triggers the stack overflow in sub_455D4.
3. Deliver Payload: Send the crafted input to the fromSetWirelessRepeat function.
4. Execute Code: Inject and execute arbitrary code on the device.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the fromSetWirelessRepeat function.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalies in device behavior.
• Incident Response: Have an incident response plan in place to quickly address any detected exploits.

References:

• Exploit and Third Party Advisory

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of exploitation and protect their networks from potential attacks.