CVE-2017-12237
CVE-2017-12237
En resumen
Una falla en dispositivos Cisco IOS e IOS XE permite que un atacante envíe paquetes de red especialmente diseñados que saturan el procesador o provocan el reinicio del dispositivo, interrumpiendo los servicios. Esto ocurre cuando el protocolo de seguridad (ISAKMP) está habilitado, aunque no se hayan configurado características de VPN.
Detalle técnico
La vulnerabilidad existe en el procesamiento de paquetes IKEv2 en Cisco IOS 15.0-15.6 e IOS XE 3.5-16.5. Un atacante remoto no autenticado puede enviar paquetes IKEv2 malformados para provocar consumo excesivo de CPU, bloqueos del sistema o reinicializaciones, causando denegación de servicio. La explotación requiere solo acceso de red al dispositivo afectado con ISAKMP habilitado; no se requiere autenticación previa ni configuración de VPN.
Resumen generado y traducido por IA a partir de la descripción oficial.
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS 15.0 through 15.6 and Cisco IOS XE 3.5 through 16.5 could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to how an affected device processes certain IKEv2 packets. An attacker could exploit this vulnerability by sending specific IKEv2 packets to an affected device to be processed. A successful exploit could allow the attacker to cause high CPU utilization, traceback messages, or a reload of the affected device that leads to a DoS condition. This vulnerability affects Cisco devices that have the Internet Security Association and Key Management Protocol (ISAKMP) enabled. Although only IKEv2 packets can be used to trigger this vulnerability, devices that are running Cisco IOS Software or Cisco IOS XE Software are vulnerable when ISAKMP is enabled. A device does not need to be configured with any IKEv2-specific features to be vulnerable. Many features use IKEv2, including different types of VPNs such as the following: LAN-to-LAN VPN; Remote-access VPN, excluding SSL VPN; Dynamic Multipoint VPN (DMVPN); and FlexVPN. Cisco Bug IDs: CSCvc41277.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H