EUVD-2024-36360

Comprehensive Technical Analysis of EUVD-2024-36360

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-36360 is a buffer overflow in the usbip.cgi set_info() functionality of the Wavlink AC3000 M33A8.V5030.210505 firmware. This vulnerability allows an authenticated attacker to send a specially crafted HTTP request, leading to a stack-based buffer overflow. 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:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low skill or resources to exploit.
• PR:H (High Privileges Required): The attacker needs high-level privileges to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required for the attack to succeed.
• S:C (Changed Scope): The vulnerability can affect resources beyond the security scope managed by the security authority.
• C:H/I:H/A:H (High Confidentiality, Integrity, and Availability Impact): Successful exploitation can result in high impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Given the nature of the vulnerability, potential attack vectors include:

• Authenticated Remote Attack: An attacker with valid credentials can send a malicious HTTP request to the usbip.cgi endpoint, triggering the buffer overflow.
• Credential Theft: If an attacker can obtain valid credentials through phishing, social engineering, or other means, they can exploit this vulnerability.
• Network-Based Exploitation: Since the attack vector is network-based, the attacker can exploit the vulnerability from anywhere with network access to the device.

Exploitation methods may involve:

• Crafting Malicious HTTP Requests: The attacker can craft an HTTP request with a payload designed to overflow the buffer in the set_info() function.
• Automated Scripts: Using automated scripts to send the malicious request repeatedly to increase the chances of successful exploitation.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

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

Other versions of the Wavlink AC3000 firmware may also be affected, but this has not been confirmed. Users should verify the firmware version and apply updates as necessary.

4. Recommended Mitigation Strategies

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

• Firmware Update: Apply the latest firmware update provided by Wavlink. Ensure that the firmware version is higher than M33A8.V5030.210505.
• Access Control: Implement strict access controls to limit who can authenticate to the device. Use strong, unique passwords and consider multi-factor authentication (MFA).
• Network Segmentation: Segment the network to isolate the Wavlink AC3000 from other critical systems, reducing the potential impact of an exploit.
• Monitoring and Logging: Enable comprehensive logging and monitoring to detect and respond to suspicious activities.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for unusual network traffic patterns that may indicate an exploitation attempt.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations and individuals using the Wavlink AC3000 device. Given the critical nature of the vulnerability, it could be exploited to disrupt network operations, exfiltrate sensitive data, or gain unauthorized access to other systems within the network. This underscores the importance of timely patching and robust cybersecurity practices to protect against such threats.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerability Type: Stack-based buffer overflow.
• Affected Function: set_info() in usbip.cgi.
• Exploitation Requirements: Authenticated HTTP request with a crafted payload.
• Detection: Monitor for unusual HTTP traffic to the usbip.cgi endpoint, especially requests with large payloads.
• Response: Immediate patching of the firmware and review of access logs to identify any potential exploitation attempts.

Conclusion

The buffer overflow vulnerability in the Wavlink AC3000 M33A8.V5030.210505 firmware is critical and requires immediate attention. Organizations should prioritize firmware updates, implement robust access controls, and enhance monitoring to mitigate the risk. The European cybersecurity landscape must remain vigilant against such vulnerabilities to ensure the integrity and security of networked devices.

References

• Talos Intelligence Vulnerability Report
• CVE ID: CVE-2024-36272
• Assigner: Talos
• ENISA ID Product: a8de226e-720b-3cda-a926-b7d6c9aa2e5c
• ENISA ID Vendor: e29f4d77-f75b-30fb-b50e-6cd769a315af