CVE-2020-3480

Multiple vulnerabilities in the Zone-Based Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload or stop forwarding traffic through the firewall. The vulnerabilities are due to incomplete handling of Layer 4 packets through the device. An attacker could exploit these vulnerabilities by sending a certain sequence of traffic patterns through the device. A successful exploit could allow the attacker to cause the device to reload or stop forwarding traffic through the firewall, resulting in a denial of service. For more information about these vulnerabilities, see the Details section of this advisory.

Multiple vulnerabilities in the Zone-Based Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload or stop forwarding traffic through the firewall. The vulnerabilities are due to incomplete handling of Layer 4 packets through the device. An attacker could exploit these vulnerabilities by sending a certain sequence of traffic patterns through the device. A successful exploit could allow the attacker to cause the device to reload or stop forwarding traffic through the firewall, resulting in a denial of service. For more information about these vulnerabilities, see the Details section of this advisory.

Múltiples vulnerabilidades en la característica de Zone-Based Firewall del Software IOS XE de Cisco podrían permitir a un atacante remoto no autenticado hacer que el dispositivo se recargue o deje de reenviar el tráfico a través del firewall. Las vulnerabilidades se deben al manejo incompleto de los paquetes de la capa 4 a través del dispositivo. Un atacante podría explotar estas vulnerabilidades enviando una cierta secuencia de patrones de tráfico a través del dispositivo. Una explotación exitosa podría permitir al atacante hacer que el dispositivo recargara o dejara de reenviar el tráfico a través del cortafuegos, lo que resultaría en una denegación de servicio. Para obtener más información sobre estas vulnerabilidades, véase la sección de detalles de este aviso