The 802.11 beacon handling routine failed to validate the length of an IEEE 802.11s Mesh ID before copying it to a heap-allocated buffer. While a FreeBSD Wi-Fi client is in scanning mode (i.e., not associated with a SSID) a malicious beacon frame may overwrite kernel memory, leading to remote code execution.
La rutina de manejo de balizas 802.11 no pudo validar la longitud de un ID de malla IEEE 802.11 antes de copiarlo en un búfer asignado en montón. Mientras un cliente Wi-Fi de FreeBSD está en modo de escaneo (es decir, no asociado con un SSID), una trama de baliza maliciosa puede sobrescribir la memoria del kernel, lo que lleva a la ejecución remota de código.
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of FreeBSD Kernel. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of 802.11 Wi-Fi beacon frames. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the kernel.
