EUVD-2024-38375

Comprehensive Technical Analysis of EUVD-2024-38375

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-38375, also known as CVE-2024-39360, is an OS command injection vulnerability in the nas.cgi remove_dir() functionality of the Wavlink AC3000 M33A8.V5030.210505 firmware. This vulnerability allows an attacker to execute arbitrary code by sending a specially crafted HTTP request. The CVSS (Common Vulnerability Scoring System) base score of 9.1 indicates a critical severity level. The scoring vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal complexity.
• Privileges Required (PR): High (H) - The attacker needs high-level privileges to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Changed (C) - The vulnerability affects a component outside the security scope.
• Confidentiality (C): High (H) - The vulnerability results in a high impact on confidentiality.
• Integrity (I): High (H) - The vulnerability results in a high impact on integrity.
• Availability (A): High (H) - The vulnerability results in a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through an authenticated HTTP request. An attacker with high-level privileges can craft a malicious HTTP request to the nas.cgi endpoint, specifically targeting the remove_dir() function. This can lead to arbitrary code execution on the affected device. Potential exploitation methods include:

• Command Injection: Injecting malicious commands through the HTTP request to execute arbitrary code on the device.
• Privilege Escalation: Using the vulnerability to gain higher privileges on the device, potentially leading to full control.
• Data Exfiltration: Extracting sensitive information from the device by executing commands that read and transmit data.

3. Affected Systems and Software Versions

The vulnerability affects the Wavlink AC3000 router with firmware version M33A8.V5030.210505. It is crucial to identify all devices running this specific firmware version to assess the scope of the impact.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Firmware Update: Immediately apply any available firmware updates provided by Wavlink. Ensure that the update process is secure and verified.
• Access Control: Implement strict access controls to limit high-level privileges to trusted users only.
• Network Segmentation: Segment the network to isolate critical devices and reduce the attack surface.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious HTTP requests targeting the nas.cgi endpoint.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using the Wavlink AC3000 router. The potential for arbitrary code execution can lead to severe consequences, including data breaches, unauthorized access, and disruption of services. Organizations must prioritize patching and securing their devices to mitigate these risks.

6. Technical Details for Security Professionals

For security professionals, the following technical details are essential:

• Vulnerability Identification: The vulnerability is identified by EUVD-2024-38375 and CVE-2024-39360.
• Affected Component: The nas.cgi remove_dir() function in the Wavlink AC3000 firmware version M33A8.V5030.210505.
• Exploitation: The vulnerability can be exploited through a specially crafted HTTP request, requiring high-level privileges.
• Mitigation: Ensure that the latest firmware updates are applied and implement robust access controls and network segmentation.
• References: For further details, refer to the Talos Intelligence report at TALOS-2024-2054.

Conclusion

The OS command injection vulnerability in the Wavlink AC3000 router is a critical issue that requires immediate attention. Organizations and individuals must take proactive measures to update their firmware, implement strong access controls, and monitor their networks for suspicious activity. By following the recommended mitigation strategies, the risk associated with this vulnerability can be significantly reduced, ensuring the security and integrity of affected systems.