EUVD-2024-38381

Comprehensive Technical Analysis of EUVD-2024-38381

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-38381 affects the Wavlink AC3000 M33A8.V5030.210505 router, specifically within the nas.cgi set_ftp_cfg() functionality. The vulnerability allows an attacker to bypass permissions and inject malicious configurations via a specially crafted HTTP request. The CVSS Base Score of 9.1 indicates a critical severity level. The CVSS 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 can be exploited remotely over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• 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 for the attack to succeed.
• Scope (S): Changed (C) - The vulnerability affects a component outside the security scope of the vulnerable component.
• 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 involves sending a specially crafted HTTP request to the nas.cgi endpoint, specifically targeting the set_ftp_cfg() function. The attacker can inject malicious configurations through the ftp_port POST parameter, leading to permission bypass and configuration injection.

Exploitation Methods:

• Permission Bypass: An authenticated attacker can bypass existing permissions to access or modify configurations.
• Configuration Injection: The attacker can inject malicious configurations, potentially leading to further compromise of the device or network.

3. Affected Systems and Software Versions

The vulnerability specifically affects the Wavlink AC3000 router with firmware version M33A8.V5030.210505. Other versions of the Wavlink AC3000 router may also be affected, but this has not been confirmed.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Ensure that the router firmware is updated to the latest version provided by Wavlink.
• Access Control: Implement strict access controls to limit who can access the router's configuration interface.
• Network Segmentation: Segment the network to isolate the router from critical systems.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• Monitoring: Implement continuous monitoring to detect and respond to suspicious activities.
• Patch Management: Establish a robust patch management process to ensure timely updates.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations and individuals using the affected Wavlink AC3000 router. Given the critical nature of the vulnerability, it could be exploited to compromise network security, leading to data breaches, unauthorized access, and potential disruption of services. The widespread use of such routers in both home and enterprise environments amplifies the potential impact.

6. Technical Details for Security Professionals

Vulnerability Details:

• Affected Function: nas.cgi set_ftp_cfg()
• Vulnerable Parameter: ftp_port POST parameter
• Exploitation: Crafted HTTP request leading to permission bypass and configuration injection

Detection and Response:

• Log Analysis: Monitor logs for unusual HTTP requests targeting the nas.cgi endpoint.
• Intrusion Detection: Implement intrusion detection systems (IDS) to detect and alert on suspicious activities.
• Incident Response: Develop an incident response plan specific to this vulnerability, including steps for containment, eradication, and recovery.

References:

• Talos Intelligence Report: TALOS-2024-2056
• ENISA Product ID: 727a2ac6-bd06-37d6-a90c-13928d9747c4
• ENISA Vendor ID: f481b167-4da6-3051-a146-4f5a47833d6a

Conclusion: The vulnerability EUVD-2024-38381 is critical and requires immediate attention from organizations and individuals using the Wavlink AC3000 router. Implementing the recommended mitigation strategies and maintaining vigilant monitoring can significantly reduce the risk of exploitation.