EUVD-2024-35163

Comprehensive Technical Analysis of EUVD-2024-35163

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-35163, also known as CVE-2024-34166, is an OS command injection vulnerability in the touchlist_sync.cgi functionality of the Wavlink AC3000 M33A8.V5030.210505 firmware. This vulnerability allows an attacker to execute arbitrary code by sending specially crafted HTTP requests. The CVSS (Common Vulnerability Scoring System) base score of 10.0 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/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 Attack Complexity): The attack requires low skill or resources.
• PR:N (No Privileges Required): No privileges are needed to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required.
• S:C (Changed Scope): The vulnerability can affect resources beyond the security scope managed by the security authority.
• C:H (High Confidentiality Impact): There is a high impact on the confidentiality of the system.
• I:H (High Integrity Impact): There is a high impact on the integrity of the system.
• A:H (High Availability Impact): There is a high impact on the availability of the system.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through crafted HTTP requests targeting the touchlist_sync.cgi endpoint. An attacker can exploit this vulnerability by:

• Sending Malicious HTTP Requests: Crafting HTTP requests that include OS commands, which the vulnerable endpoint will execute.
• Automated Scripts: Using automated scripts to send a large number of malicious requests, increasing the likelihood of successful exploitation.
• Phishing and Social Engineering: Tricking users into visiting malicious websites that send crafted HTTP requests to the vulnerable device.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• 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: Immediately update the firmware to a version that addresses this vulnerability.
• Network Segmentation: Isolate the affected devices from critical networks to limit the potential impact.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the touchlist_sync.cgi endpoint.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious HTTP requests targeting the vulnerable endpoint.
• User Education: Educate users about the risks of phishing and social engineering attacks.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using the Wavlink AC3000 router. The high severity score and the ease of exploitation make it a prime target for cybercriminals. Successful exploitation can lead to data breaches, unauthorized access, and disruption of services, impacting both personal and organizational security.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: touchlist_sync.cgi
• Function: touchlistsync()
• Exploitation Method: OS command injection via HTTP requests

Detection and Response:

• Log Analysis: Monitor logs for unusual HTTP requests targeting the touchlist_sync.cgi endpoint.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalous activities that may indicate an exploitation attempt.
• Patch Management: Ensure that all devices are updated with the latest firmware patches.

References:

• Talos Intelligence Report: TALOS-2024-2000

By following these recommendations and staying vigilant, organizations can significantly reduce the risk posed by this vulnerability.