EUVD-2024-38364

Comprehensive Technical Analysis of EUVD-2024-38364

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-38364 is a stack-based buffer overflow in the wireless.cgi SetName() functionality of the Wavlink AC3000 M33A8.V5030.210505. This vulnerability allows an attacker to execute arbitrary commands by sending 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 is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): High (H) - The attacker needs to be authenticated.
• 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) - Complete loss of confidentiality.
• Integrity (I): High (H) - Complete loss of integrity.
• Availability (A): High (H) - Complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through an authenticated HTTP request. An attacker could exploit this vulnerability by:

• Gaining Authenticated Access: The attacker must first obtain valid credentials to access the device.
• Crafting a Malicious HTTP Request: The attacker sends a specially crafted HTTP request to the wireless.cgi endpoint, targeting the SetName() function.
• Executing Arbitrary Commands: The buffer overflow allows the attacker to inject and execute arbitrary commands on the device.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

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

Other versions of the Wavlink AC3000 may also be affected, but this has not been confirmed.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following steps are recommended:

• Patch Management: Apply the latest firmware updates provided by Wavlink. Ensure that all devices are running the most recent, secure version of the firmware.
• Access Control: Implement strong authentication mechanisms and limit access to the device to trusted users only.
• Network Segmentation: Isolate the device on a separate network segment to limit the potential impact of an attack.
• Monitoring and Logging: Enable logging and monitoring to detect any unusual activity or unauthorized access attempts.
• Intrusion Detection/Prevention Systems (IDS/IPS): Deploy IDS/IPS to detect and prevent exploitation attempts.

5. Impact on European Cybersecurity Landscape

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

6. Technical Details for Security Professionals

• Vulnerability Type: Stack-based buffer overflow
• Affected Component: wireless.cgi SetName() function
• Exploitation Method: Authenticated HTTP request with a specially crafted payload
• Impact: Arbitrary command execution leading to potential full system compromise
• Detection: Monitor for unusual HTTP requests to the wireless.cgi endpoint and any unexpected command execution on the device.
• Mitigation: Ensure firmware is up-to-date, enforce strong authentication, and implement network segmentation.

Conclusion

EUVD-2024-38364 represents a critical vulnerability in the Wavlink AC3000 M33A8.V5030.210505 device. Organizations and individuals using this device should prioritize applying the latest firmware updates and implementing robust security measures to mitigate the risk. The European cybersecurity community should remain vigilant and proactive in addressing such vulnerabilities to protect against potential exploitation.

References

• Talos Intelligence Vulnerability Report
• CVE ID: CVE-2024-39357
• Assigner: Talos
• ENISA ID Product: 9ffc2b15-6900-39de-b062-32593639429d
• ENISA ID Vendor: 04487978-b11e-389e-9b75-067e1bc828e4