EUVD-2024-36596

Comprehensive Technical Analysis of EUVD-2024-36596

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-36596 is an OS command injection vulnerability in the adm.cgi set_ledonoff() functionality of the Wavlink AC3000 M33A8.V5030.210505. This vulnerability allows an attacker to execute arbitrary code by sending a specially crafted HTTP request. The CVSS (Common Vulnerability Scoring System) base score of 9.1 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 - Attack Vector: Network
• AC:L - Attack Complexity: Low
• PR:H - Privileges Required: High
• UI:N - User Interaction: None
• S:C - Scope: Changed
• C:H - Confidentiality: High
• I:H - Integrity: High
• A:H - Availability: High

The high base score reflects the potential for significant impact on confidentiality, integrity, and availability, even though high privileges are required for exploitation.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through authenticated HTTP requests. An attacker with valid credentials can craft an HTTP request that injects malicious commands into the set_ledonoff() function. This can lead to arbitrary code execution on the affected device. Potential exploitation methods include:

• Command Injection: Injecting OS commands to execute arbitrary code.
• Privilege Escalation: Using the injected commands to escalate privileges.
• Data Exfiltration: Extracting sensitive information from the device.
• Denial of Service (DoS): Disrupting the normal operation of the device.

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 or different models may also be affected if they share the same vulnerable codebase. It is crucial to verify the firmware version and apply patches as necessary.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following strategies are recommended:

• Firmware Update: Apply the latest firmware updates provided by Wavlink. Ensure that the firmware version addresses the vulnerability.
• Access Control: Implement strict access controls to limit who can authenticate and access the device.
• Network Segmentation: Segment the network to isolate critical devices and reduce the attack surface.
• Monitoring and Logging: Enable comprehensive logging and monitoring to detect and respond to suspicious activities.
• Intrusion Detection Systems (IDS): Deploy IDS to identify and alert on potential exploitation attempts.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations and individuals using the Wavlink AC3000 router. Given the critical nature of the vulnerability, it could be exploited to compromise network security, leading to data breaches, service disruptions, and potential financial losses. The European Union's emphasis on cybersecurity and data protection makes it imperative for organizations to address this vulnerability promptly.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: set_ledonoff() in adm.cgi
• Exploitation: Crafted HTTP request with injected OS commands
• Impact: Arbitrary code execution, potential privilege escalation, data exfiltration, and DoS

Detection and Response:

• Detection: Monitor for unusual HTTP requests targeting adm.cgi. Look for patterns indicative of command injection.
• Response: Immediately isolate the affected device, apply the latest firmware updates, and review access logs for signs of compromise.

References:

• Talos Intelligence Report: TALOS-2024-2032
• CVE ID: CVE-2024-37186

Conclusion: The OS command injection vulnerability in the Wavlink AC3000 router is critical and requires immediate attention. Organizations should prioritize firmware updates and implement robust security measures to mitigate the risk. Continuous monitoring and proactive incident response are essential to safeguard against potential exploitation.

This analysis provides a comprehensive overview for cybersecurity professionals to understand the vulnerability, assess its impact, and implement effective mitigation strategies.