CVSS: 6.0EPSS: 0%CPEs: 128EXPL: 0CVE-2020-3503 – Cisco IOS XE Software Guest Shell Unauthorized File System Access Vulnerability
https://notcve.org/view.php?id=CVE-2020-3503
A vulnerability in the file system permissions of Cisco IOS XE Software could allow an authenticated, local attacker to obtain read and write access to critical configuration or system files. The vulnerability is due to insufficient file system permissions on an affected device. An attacker could exploit this vulnerability by connecting to an affected device's guest shell, and accessing or modifying restricted files. A successful exploit could allow the attacker to view or modify restricted information or configurations that are normally not accessible to system administrators. Una vulnerabilidad en los permisos del sistema de archivos de Cisco IOS XE Software, podría permitir a un atacante local autenticado conseguir acceso de lectura y escritura a la configuración crítica o archivos del sistema. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-unauth-file-access-eBTWkKVW • CWE-284: Improper Access Control CWE-732: Incorrect Permission Assignment for Critical Resource •
CVSS: 7.4EPSS: 0%CPEs: 149EXPL: 0CVE-2020-3508 – Cisco IOS XE Software for Cisco ASR 1000 Series 20-Gbps Embedded Services Processor IP ARP Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2020-3508
A vulnerability in the IP Address Resolution Protocol (ARP) feature of Cisco IOS XE Software for Cisco ASR 1000 Series Aggregation Services Routers with a 20-Gbps Embedded Services Processor (ESP) installed could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service condition. The vulnerability is due to insufficient error handling when an affected device has reached platform limitations. An attacker could exploit this vulnerability by sending a malicious series of IP ARP messages to an affected device. A successful exploit could allow the attacker to exhaust system resources, which would eventually cause the affected device to reload. Una vulnerabilidad en la funcionalidad de Address Resolution Protocol (ARP) de IP de Cisco IOS XE Software para Cisco ASR 1000 Series Aggregation Services Routers con un Embedded Services Processor (ESP) de 20-Gbps instalado, podría permitir a un atacante adyacente no autenticado causar la recarga de un dispositivo afectado, resultando en una condición de denegación de servicio. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esp20-arp-dos-GvHVggqJ • CWE-400: Uncontrolled Resource Consumption •
CVSS: 8.6EPSS: 0%CPEs: 2EXPL: 0CVE-2020-3509 – Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers DHCP Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2020-3509
A vulnerability in the DHCP message handler of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause the supervisor to crash, which could result in a denial of service (DoS) condition. The vulnerability is due to insufficient error handling when DHCP version 4 (DHCPv4) messages are parsed. An attacker could exploit this vulnerability by sending a malicious DHCPv4 message to or through a WAN interface of an affected device. A successful exploit could allow the attacker to cause a reload of the affected device. Note: On Cisco cBR-8 Converged Broadband Routers, all of the following are considered WAN interfaces: 10 Gbps Ethernet interfaces 100 Gbps Ethernet interfaces Port channel interfaces that include multiple 10 and/or 100 Gbps Ethernet interfaces Una vulnerabilidad en el manejador de mensajes DHCP de Cisco IOS XE Software para Cisco cBR-8 Converged Broadband Routers, podría permitir a un atacante remoto no autenticado causar que el supervisor se bloquee, lo que podría resultar en una condición de denegación de servicio (DoS). • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-dhcp-dos-JSCKX43h • CWE-203: Observable Discrepancy CWE-388: 7PK - Errors •
CVSS: 8.6EPSS: 0%CPEs: 53EXPL: 0CVE-2020-3510 – Cisco IOS XE Software for Catalyst 9200 Series Switches Umbrella Connector Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2020-3510
A vulnerability in the Umbrella Connector component of Cisco IOS XE Software for Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to trigger a reload, resulting in a denial of service condition on an affected device. The vulnerability is due to insufficient error handling when parsing DNS requests. An attacker could exploit this vulnerability by sending a series of malicious DNS requests to an Umbrella Connector client interface of an affected device. A successful exploit could allow the attacker to cause a crash of the iosd process, which triggers a reload of the affected device. Una vulnerabilidad en el componente Umbrella Connector de Cisco IOS XE Software para Cisco Catalyst 9200 Series Switches, podría permitir a un atacante remoto no autenticado desencadenar una recarga, resultando en una condición de denegación de servicio en un dispositivo afectado. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-umbrella-dos-t2QMUX37 • CWE-388: 7PK - Errors CWE-400: Uncontrolled Resource Consumption •
CVSS: 7.4EPSS: 0%CPEs: 51EXPL: 0CVE-2020-3511 – Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2020-3511
A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device. Una vulnerabilidad en el subsistema ISDN de Cisco IOS Software y Cisco IOS XE Software, podría permitir a un atacante adyacente no autenticado causar una recarga de un dispositivo afectado, resultando en una condición de denegación de servicio (DoS). • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-isdn-q931-dos-67eUZBTf • CWE-20: Improper Input Validation •