CVE-2021-40120

Cisco Small Business RV Series Routers Command Injection Vulnerability

Severity Score

7.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers could allow an authenticated, remote attacker with administrative privileges to inject arbitrary commands into the underlying operating system and execute them using root-level privileges. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending malicious input to a specific field in the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying Linux operating system as a user with root-level privileges.

Una vulnerabilidad en la interfaz de administración basada en la web de algunos routers de la serie RV de Cisco Small Business podría permitir a un atacante remoto autenticado con privilegios administrativos inyectar comandos arbitrarios en el sistema operativo subyacente y ejecutarlos usando privilegios de nivel de root. Esta vulnerabilidad es debido a que no se comprueba suficientemente la entrada proporcionada por el usuario. Un atacante podría explotar esta vulnerabilidad mediante el envío de una entrada maliciosa a un campo específico de la interfaz de administración basada en la web de un dispositivo afectado. Una explotación con éxito podría permitir al atacante ejecutar comandos arbitrarios en el sistema operativo Linux subyacente como un usuario con privilegios de nivel de root

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-25 CVE Reserved
2021-11-04 CVE Published
2024-01-27 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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-sbrv-cmdinjection-Z5cWFdK	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 Xr Search vendor "Cisco" for product "Ios Xr"	4.2.3.06 Search vendor "Cisco" for product "Ios Xr" and version "4.2.3.06"	-	Affected	in	Cisco Search vendor "Cisco"	Rv016 Search vendor "Cisco" for product "Rv016"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xr Search vendor "Cisco" for product "Ios Xr"	4.2.3.06 Search vendor "Cisco" for product "Ios Xr" and version "4.2.3.06"	-	Affected	in	Cisco Search vendor "Cisco"	Rv042 Search vendor "Cisco" for product "Rv042"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xr Search vendor "Cisco" for product "Ios Xr"	4.2.3.06 Search vendor "Cisco" for product "Ios Xr" and version "4.2.3.06"	-	Affected	in	Cisco Search vendor "Cisco"	Rv042g Search vendor "Cisco" for product "Rv042g"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xr Search vendor "Cisco" for product "Ios Xr"	4.2.3.06 Search vendor "Cisco" for product "Ios Xr" and version "4.2.3.06"	-	Affected	in	Cisco Search vendor "Cisco"	Rv082 Search vendor "Cisco" for product "Rv082"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xr Search vendor "Cisco" for product "Ios Xr"	4.2.3.06 Search vendor "Cisco" for product "Ios Xr" and version "4.2.3.06"	-	Affected	in	Cisco Search vendor "Cisco"	Rv320 Search vendor "Cisco" for product "Rv320"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xr Search vendor "Cisco" for product "Ios Xr"	4.2.3.06 Search vendor "Cisco" for product "Ios Xr" and version "4.2.3.06"	-	Affected	in	Cisco Search vendor "Cisco"	Rv325 Search vendor "Cisco" for product "Rv325"	-	-	Safe
Cisco Search vendor "Cisco"		Application Extension Platform Search vendor "Cisco" for product "Application Extension Platform"				1.5.1.13 Search vendor "Cisco" for product "Application Extension Platform" and version "1.5.1.13"		-		Affected