CVE-2021-1452

Cisco IOS XE ROM Monitor Software for Cisco Industrial Switches OS Command Injection Vulnerability

Severity Score

6.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

A vulnerability in the ROM Monitor (ROMMON) of Cisco IOS XE Software for Cisco Catalyst IE3200, IE3300, and IE3400 Rugged Series Switches, Cisco Catalyst IE3400 Heavy Duty Series Switches, and Cisco Embedded Services 3300 Series Switches could allow an unauthenticated, physical attacker to execute unsigned code at system boot time. This vulnerability is due to incorrect validations of specific function arguments passed to a boot script when specific ROMMON variables are set. An attacker could exploit this vulnerability by setting malicious values for a specific ROMMON variable. A successful exploit could allow the attacker to execute unsigned code and bypass the image verification check during the secure boot process of an affected device. To exploit this vulnerability, the attacker would need to have unauthenticated, physical access to the device or obtain privileged access to the root shell on the device.

Una vulnerabilidad en el ROM Monitor (ROMMON) del Software Cisco IOS XE para los Switches Cisco Catalyst IE3200, IE3300 e IE3400 Rugged Series, los Switches Cisco Catalyst IE3400 Heavy Duty Series y los Switches Cisco Embedded Services 3300 Series, podría permitir a un atacante físico no autenticado ejecutar código sin firmar en el momento del arranque del sistema. Esta vulnerabilidad es debido a comprobaciones incorrectas de argumentos de funciones específicas que se pasan a un script de arranque cuando se establecen variables ROMMON específicas. Un atacante podría explotar esta vulnerabilidad estableciendo valores maliciosos para una variable ROMMON específica. Una explotación con éxito podría permitir al atacante ejecutar código sin firmar y omitir la comprobación de la imagen durante el proceso de arranque seguro de un dispositivo afectado. Para explotar esta vulnerabilidad, el atacante no necesitaría estar autenticado, tener acceso físico al dispositivo u obtener acceso privilegiado al shell root en el dispositivo

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-03-24 CVE Published
2023-12-22 EPSS Updated
2024-11-08 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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-iosxe-romvar-cmd-inj-N56fYbrw	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 Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor"	<= 7.0 Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " <= 7.0"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst Ie3200 Rugged Switch Search vendor "Cisco" for product "Catalyst Ie3200 Rugged Switch"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor"	<= 7.0 Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " <= 7.0"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst Ie3300 Rugged Switch Search vendor "Cisco" for product "Catalyst Ie3300 Rugged Switch"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor"	<= 7.0 Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " <= 7.0"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst Ie3400 Heavy Duty Switch Search vendor "Cisco" for product "Catalyst Ie3400 Heavy Duty Switch"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor"	<= 7.0 Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " <= 7.0"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst Ie3400 Rugged Switch Search vendor "Cisco" for product "Catalyst Ie3400 Rugged Switch"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor"	<= 7.0 Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " <= 7.0"	-	Affected	in	Cisco Search vendor "Cisco"	Ess 3300 Search vendor "Cisco" for product "Ess 3300"	-	-	Safe