CVE-2019-1965

A vulnerability in the Virtual Shell (VSH) session management for Cisco NX-OS Software could allow an authenticated, remote attacker to cause a VSH process to fail to delete upon termination. This can lead to a build-up of VSH processes that overtime can deplete system memory. When there is no system memory available, this can cause unexpected system behaviors and crashes. The vulnerability is due to the VSH process not being properly deleted when a remote management connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly performing a remote management connection to the device and terminating the connection in an unexpected manner. A successful exploit could allow the attacker to cause the VSH processes to fail to delete, which can lead to a system-wide denial of service (DoS) condition. The attacker must have valid user credentials to log in to the device using the remote management connection.

A vulnerability in the Virtual Shell (VSH) session management for Cisco NX-OS Software could allow an authenticated, remote attacker to cause a VSH process to fail to delete upon termination. This can lead to a build-up of VSH processes that overtime can deplete system memory. When there is no system memory available, this can cause unexpected system behaviors and crashes. The vulnerability is due to the VSH process not being properly deleted when a remote management connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly performing a remote management connection to the device and terminating the connection in an unexpected manner. A successful exploit could allow the attacker to cause the VSH processes to fail to delete, which can lead to a system-wide denial of service (DoS) condition. The attacker must have valid user credentials to log in to the device using the remote management connection.

Una vulnerabilidad en la administración de sesión de Virtual Shell (VSH) para el software Cisco NX-OS podría permitir que un atacante remoto autenticado haga que un proceso VSH no se elimine al finalizar. Esto puede conducir a una acumulación de procesos VSH que las horas extras pueden agotar la memoria del sistema. Cuando no hay memoria del sistema disponible, esto puede causar comportamientos inesperados del sistema y fallos. La vulnerabilidad se debe a que el proceso VSH no se elimina correctamente cuando se desconecta una conexión de administración remota al dispositivo. Un atacante podría aprovechar esta vulnerabilidad al realizar repetidamente una conexión de administración remota al dispositivo y terminar la conexión de manera inesperada. Una explotación con éxito podría permitir al atacante hacer que los procesos VSH no se eliminen, lo que puede conducir a una condición de denegación de servicio (DoS) en todo el sistema. El atacante debe tener credenciales de usuario válidas para iniciar sesión en el dispositivo utilizando la conexión de administración remota.