A remote command injection vulnerability exists in Vacron Network Video Recorder (NVR) devices v1.4 due to improper input sanitization in the board.cgi script. The vulnerability allows unauthenticated attackers to pass arbitrary commands to the underlying operating system via crafted HTTP requests. These commands are executed with the privileges of the web server process, enabling remote code execution and potential full device compromise. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-06 UTC.
The board.cgi script handling HTTP requests does not perform proper input data sanitization (CWE-20), which allows for injection of operating system commands (CWE-78). An attacker sends a crafted HTTP request containing a malicious payload directly to the vulnerable endpoint without needing to possess any credentials. The transmitted commands are then executed with the privileges of the web server process running on the device.
An attacker can remotely execute arbitrary code on the device (RCE) with the privileges of the web server process, which in practice may lead to complete takeover of the recorder, loss of availability, integrity and confidentiality of processed data, and potential use of the device as an entry point to the network.
Patches available from the manufacturer should be applied in accordance with the references provided. As additional protective measures, it is recommended to isolate NVR devices from direct internet access, place them behind a firewall, and restrict access to the management interface exclusively to trusted IP addresses.
Vacron Network Video Recorder (NVR) version v1.4
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X