CVE-2023-35056 is a stack-based buffer overflow vulnerability identified in the Yifan YF325 device, specifically in the httpd server's next_page parameter within the cgi_handler function. The vulnerability arises due to improper bounds checking when processing the next_page parameter in network requests, allowing an attacker to overflow the stack buffer. This overflow can overwrite critical memory regions, enabling arbitrary code execution on the device. The flaw is exploitable remotely over the network without requiring prior authentication, although user interaction (such as triggering the request) is necessary. The vulnerability affects version v1.0_20221108 of the YF325 device. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity and no privileges required. While no public exploits have been reported yet, the potential for remote command execution makes this a critical risk. The YF325 device is typically used in industrial or specialized network environments, where compromise could lead to operational disruptions or data breaches. The lack of an official patch at the time of reporting necessitates immediate risk mitigation through network controls and monitoring.

For European organizations, exploitation of CVE-2023-35056 could lead to full compromise of affected Yifan YF325 devices, resulting in unauthorized command execution. This can cause severe confidentiality breaches, data manipulation, and service disruption. Industrial control systems or network infrastructure relying on these devices may experience downtime or operational failures, impacting business continuity and safety. Given the device’s role in specialized environments, attackers could leverage this vulnerability to pivot within networks, escalate privileges, or exfiltrate sensitive information. The absence of authentication requirements lowers the barrier for attackers, increasing the risk of widespread exploitation if the vulnerability becomes publicly weaponized. European entities in sectors such as manufacturing, utilities, and critical infrastructure are particularly at risk due to the potential cascading effects of device compromise.

1. Immediately restrict network access to Yifan YF325 devices by implementing firewall rules that limit incoming traffic to trusted sources only. 2. Employ network segmentation to isolate these devices from general enterprise networks, reducing the attack surface. 3. Monitor network traffic for unusual or malformed requests targeting the httpd service, especially those containing the next_page parameter. 4. Disable or restrict access to the vulnerable httpd service if feasible until a vendor patch is available. 5. Engage with the vendor to obtain security updates or patches and apply them promptly once released. 6. Conduct regular vulnerability scans and penetration tests focusing on Yifan devices to detect potential exploitation attempts. 7. Implement intrusion detection/prevention systems (IDS/IPS) tuned to detect buffer overflow attack patterns targeting CGI handlers. 8. Educate network administrators about this vulnerability and ensure incident response plans include procedures for Yifan device compromise scenarios.