CVE-2023-41563

Comprehensive Technical Analysis of CVE-2023-41563

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-41563

Description: The vulnerability affects Tenda AC9 V3.0 V15.03.06.42_multi and Tenda AC5 US_AC5V1.0RTL_V15.03.06.28 devices. It involves a stack overflow via the mac parameter at the URL /goform/GetParentControlInfo.

CVSS Score: 9.8

Severity Evaluation:

• Critical: A CVSS score of 9.8 indicates a critical vulnerability. This high score is likely due to the potential for remote code execution, which can lead to complete system compromise.
• Impact: The vulnerability can result in unauthorized access, data breaches, and loss of system integrity.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability remotely by sending a crafted HTTP request to the affected device.
• Network Access: The attacker needs network access to the device, which can be achieved through various means such as compromising a connected device or exploiting another vulnerability.

Exploitation Methods:

• Stack Overflow: The attacker can send a specially crafted mac parameter in the HTTP request to /goform/GetParentControlInfo, causing a stack overflow.
• Code Execution: The stack overflow can be leveraged to execute arbitrary code on the device, leading to full control over the affected system.

3. Affected Systems and Software Versions

Affected Devices:

• Tenda AC9 V3.0 with firmware version V15.03.06.42_multi
• Tenda AC5 with firmware version US_AC5V1.0RTL_V15.03.06.28

Software Versions:

• The vulnerability is specific to the mentioned firmware versions. Other versions may also be affected but have not been explicitly identified in the CVE.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Apply the latest firmware updates provided by Tenda. Ensure that the devices are running the most recent, patched versions.
• Network Segmentation: Isolate affected devices from critical networks to limit the potential impact of an exploit.
• Access Control: Implement strict access controls to limit who can access the device's management interface.

Long-Term Strategies:

• Regular Patching: Establish a regular patching schedule to ensure all devices are up-to-date with the latest security patches.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity and potential exploitation attempts.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential risks.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Device Compromise: Affected devices can be compromised, leading to unauthorized access and potential data breaches.
• Network Security: Compromised devices can be used as entry points for further attacks within the network.

Long-Term Impact:

• Reputation: Organizations using affected devices may face reputational damage if a breach occurs.
• Compliance: Failure to address this vulnerability can result in non-compliance with regulatory requirements, leading to legal and financial penalties.

6. Technical Details for Security Professionals

Exploit Details:

• URL: /goform/GetParentControlInfo
• Parameter: mac
• Vulnerability Type: Stack Overflow
• Exploit Code: Available in the referenced GitHub repository (https://github.com/peris-navince/founded-0-days/blob/main/GetParentControlInfo/1.md).

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the /goform/GetParentControlInfo endpoint.
• Anomaly Detection: Use anomaly detection tools to identify deviations from normal behavior.
• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.

Conclusion: CVE-2023-41563 represents a significant risk to organizations using the affected Tenda devices. Immediate action is required to mitigate the vulnerability and protect against potential exploitation. Regular updates, network segmentation, and robust security practices are essential to maintaining a secure cyber environment.