CVE-2025-34117

A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 due to the presence of an undocumented backdoor listener on UDP port 53413. Exact version boundaries remain undocumented. An unauthenticated remote attacker can send specially crafted UDP packets to execute arbitrary commands on the affected device. This backdoor uses a hardcoded authentication mechanism and accepts shell commands post-authentication. Some device models include a non-standard implementation of the `echo` command, which may affect exploitability.

A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 due to the presence of an undocumented backdoor listener on UDP port 53413. Exact version boundaries remain undocumented. An unauthenticated remote attacker can send specially crafted UDP packets to execute arbitrary commands on the affected device. This backdoor uses a hardcoded authentication mechanism and accepts shell commands post-authentication. Some device models include a non-standard implementation of the `echo` command, which may affect exploitability.

Existe una vulnerabilidad de ejecución remota de código en varios modelos de routers Netcore y Netis con firmware publicado antes de agosto de 2014 debido a la presencia de un detector de puerta trasera no documentado en el puerto UDP 53413. Los límites exactos de la versión aún no se han documentado. Un atacante remoto no autenticado puede enviar paquetes UDP especialmente manipulados para ejecutar comandos arbitrarios en el dispositivo afectado. Esta puerta trasera utiliza un mecanismo de autenticación codificado y acepta comandos de shell tras la autenticación. Algunos modelos de dispositivos incluyen una implementación no estándar del comando `echo`, lo que podría afectar su explotabilidad.