EUVD-2024-38359

Comprehensive Technical Analysis of EUVD-2024-38359

1. Vulnerability Assessment and Severity Evaluation

The EUVD entry EUVD-2024-38359 describes multiple OS command injection vulnerabilities in the internet.cgi set_add_routing() functionality of the Wavlink AC3000 M33A8.V5030.210505. These vulnerabilities allow an attacker to execute arbitrary commands on the affected device through a specially crafted HTTP request. The command injection vulnerability specifically exists in the custom_interface POST parameter.

Severity Evaluation:

• Base Score: 9.1 (CVSS 3.1)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

The high base score indicates a critical vulnerability. The attack vector (AV:N) is network-based, requiring low complexity (AC:L) and high privileges (PR:H). The impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H), and the scope is changed (S:C), meaning the vulnerability can affect components beyond its security scope.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated HTTP Request: An attacker with valid credentials can send a specially crafted HTTP request to the internet.cgi endpoint, exploiting the set_add_routing() functionality.
• Command Injection: The custom_interface POST parameter is vulnerable to command injection, allowing the attacker to execute arbitrary commands on the device.

Exploitation Methods:

• Crafting Malicious HTTP Requests: An attacker can craft an HTTP request that includes malicious commands in the custom_interface parameter.
• Automated Scripts: Attackers can use automated scripts to send multiple requests, attempting to exploit the vulnerability and gain control over the device.

3. Affected Systems and Software Versions

Affected Systems:

• Device: Wavlink AC3000
• Firmware Version: M33A8.V5030.210505

Software Versions:

• The vulnerability specifically affects the internet.cgi script within the firmware version M33A8.V5030.210505.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Firmware Update: Users should immediately update to a patched firmware version provided by Wavlink.
• Access Control: Restrict access to the device's management interface to trusted networks and users.
• Network Segmentation: Isolate the device on a separate network segment to limit potential attack vectors.

Long-Term Mitigation:

• Regular Security Audits: Conduct regular security audits and vulnerability assessments on network devices.
• Patch Management: Implement a robust patch management process to ensure timely updates and patches.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor and detect suspicious activities on the network.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations and individuals using the Wavlink AC3000 device. Given the device's role in network routing, successful exploitation could lead to:

• Unauthorized Access: Attackers could gain unauthorized access to network devices and sensitive information.
• Network Disruption: The vulnerability could be used to disrupt network operations, leading to service outages.
• Data Breaches: Sensitive data could be compromised, leading to potential data breaches and compliance issues.

6. Technical Details for Security Professionals

Vulnerability Details:

• Vulnerable Endpoint: internet.cgi
• Vulnerable Function: set_add_routing()
• Vulnerable Parameter: custom_interface

Exploitation Steps:

1. Authentication: Obtain valid credentials for the device's management interface.
2. Crafting Request: Craft an HTTP POST request targeting the internet.cgi endpoint with a malicious payload in the custom_interface parameter.
3. Execution: Send the crafted request to the device, leading to arbitrary command execution.

Detection and Monitoring:

• Log Analysis: Monitor device logs for unusual activities and unauthorized access attempts.
• Network Traffic Analysis: Use network traffic analysis tools to detect suspicious HTTP requests targeting the internet.cgi endpoint.

Conclusion: The EUVD-2024-38359 vulnerability in the Wavlink AC3000 device is critical and requires immediate attention. Organizations should prioritize updating affected devices and implementing robust security measures to mitigate the risk. Regular monitoring and security audits are essential to detect and respond to potential exploitation attempts effectively.