CVE-2020-3426

Cisco IOS Software for Cisco Industrial Routers Virtual-LPWA Unauthorized Access Vulnerability

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

A vulnerability in the implementation of the Low Power, Wide Area (LPWA) subsystem of Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an unauthenticated, remote attacker to gain unauthorized read access to sensitive data or cause a denial of service (DoS) condition. The vulnerability is due to a lack of input and validation checking mechanisms for virtual-LPWA (VLPWA) protocol modem messages. An attacker could exploit this vulnerability by supplying crafted packets to an affected device. A successful exploit could allow the attacker to gain unauthorized read access to sensitive data or cause the VLPWA interface of the affected device to shut down, resulting in DoS condition.

Una vulnerabilidad en la implementación del subsistema Low Power, Wide Area (LPWA) de Cisco IOS Software para Cisco 800 Series Industrial Integrated Services Routers (Industrial ISRs) y Cisco 1000 Series Connected Grid Routers (CGR1000), podría permitir a un atacante remoto no autenticado conseguir acceso de lectura no autorizado a datos confidenciales o causar una condición de denegación de servicio (DoS). La vulnerabilidad es debido a la falta de mecanismos de comprobación de entrada para mensajes de módem de protocolo virtual-LPWA (VLPWA). Un atacante podría explotar esta vulnerabilidad mediante el suministro de paquetes diseñados hacia un dispositivo afectado. Una explotación con éxito podría permitir al atacante conseguir acceso de lectura no autorizado a datos confidenciales o hacer que la interfaz VLPWA del dispositivo afectado se apague, resultando una condición DoS.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2019-12-12 CVE Reserved
2020-09-24 CVE Published
2024-06-11 EPSS Updated
2024-11-13 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-264: Permissions, Privileges, and Access Controls

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-lpwa-access-cXsD7PRA	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Cisco Search vendor "Cisco"	1120 Connected Grid Router Search vendor "Cisco" for product "1120 Connected Grid Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Cisco Search vendor "Cisco"	1240 Connected Grid Router Search vendor "Cisco" for product "1240 Connected Grid Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Cisco Search vendor "Cisco"	807 Industrial Integrated Services Router Search vendor "Cisco" for product "807 Industrial Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Cisco Search vendor "Cisco"	809 Industrial Integrated Services Router Search vendor "Cisco" for product "809 Industrial Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Cisco Search vendor "Cisco"	829 Industrial Integrated Services Router Search vendor "Cisco" for product "829 Industrial Integrated Services Router"	-	-	Safe