EUVD-2024-38356

Comprehensive Technical Analysis of EUVD-2024-38356

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-38356, also known as CVE-2024-39762, pertains to multiple OS command injection vulnerabilities in the internet.cgi set_add_routing() functionality of the Wavlink AC3000 M33A8.V5030.210505 firmware. The vulnerability allows an attacker to execute arbitrary commands by sending a specially crafted HTTP request. The Base Score of 9.1, as per CVSS 3.1, indicates a critical severity level. The vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

• AV:N - Network vector, indicating the vulnerability is exploitable over the network.
• AC:L - Low attack complexity, suggesting the attack is relatively straightforward.
• PR:H - High privileges required, meaning the attacker needs to be authenticated.
• UI:N - No user interaction required.
• S:C - Changes the scope, affecting components beyond the vulnerable software.
• C:H/I:H/A:H - High impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves sending a crafted HTTP request to the internet.cgi endpoint, specifically targeting the netmask POST parameter. An attacker with authenticated access can exploit this vulnerability to inject malicious commands, leading to arbitrary command execution on the device. This can result in:

• Remote Code Execution (RCE): Executing arbitrary commands on the device.
• Data Exfiltration: Stealing sensitive information.
• Device Compromise: Taking control of the device to perform further malicious activities.

3. Affected Systems and Software Versions

The vulnerability affects the Wavlink AC3000 router with firmware version M33A8.V5030.210505. It is crucial to note that other versions of the firmware or similar devices from Wavlink might also be affected if they share the same codebase or functionality.

4. Recommended Mitigation Strategies

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

• Firmware Update: Immediately update the firmware to a patched version once available.
• Access Control: Ensure that only trusted users have authenticated access to the device.
• Network Segmentation: Isolate the device on a separate network segment to limit potential attack surfaces.
• Monitoring and Logging: Implement robust monitoring and logging to detect and respond to suspicious activities.
• Input Validation: Ensure that all input parameters are properly validated and sanitized to prevent command injection.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using the affected Wavlink AC3000 routers. The potential for remote code execution and data exfiltration can lead to severe breaches, impacting confidentiality, integrity, and availability of data. This underscores the importance of timely patching and adherence to best security practices.

6. Technical Details for Security Professionals

Vulnerability Details:

• Affected Component: internet.cgi set_add_routing() functionality.
• Vulnerable Parameter: netmask POST parameter.
• Exploitation: Crafted HTTP request leading to command injection.

Detection and Response:

• Detection: Implement intrusion detection systems (IDS) to monitor for unusual HTTP requests targeting the internet.cgi endpoint.
• Response: Develop incident response plans to quickly identify and mitigate any exploitation attempts. Ensure that backups are in place to restore affected systems.

Patching and Updates:

• Vendor Communication: Engage with Wavlink for updates on firmware patches and security advisories.
• Patch Management: Implement a robust patch management process to ensure timely updates of all network devices.

Security Best Practices:

• Authentication: Enforce strong authentication mechanisms and regularly update credentials.
• Firewall Rules: Implement strict firewall rules to limit access to the device.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential risks.

By addressing these points, organizations can significantly reduce the risk posed by this vulnerability and enhance their overall cybersecurity posture.