CVE-2020-3403

Cisco IOS XE Software Command Injection Vulnerability

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the CLI of Cisco IOS XE Software could allow an authenticated, local attacker to inject a command to the underlying operating system that will execute with root privileges upon the next reboot of the device. The authenticated user must have privileged EXEC permissions on the device. The vulnerability is due to insufficient protection of values passed to a script that executes during device startup. An attacker could exploit this vulnerability by writing values to a specific file. A successful exploit could allow the attacker to execute commands with root privileges each time the affected device is restarted.

Una vulnerabilidad en la CLI de Cisco IOS XE Software, podría permitir a un atacante local autenticado inyectar un comando en el sistema operativo subyacente que se ejecutará con privilegios root en el próximo reinicio del dispositivo. El usuario autenticado debe tener permisos EXEC privilegiados en el dispositivo. La vulnerabilidad es debido a la protección insuficiente de los valores pasados ??hacia un script que se ejecuta durante el arranque del dispositivo. Un atacante podría explotar esta vulnerabilidad escribiendo valores en un archivo específico. Una explotación con éxito podría permitir al atacante ejecutar comandos con privilegios root cada vez que se reinicia el dispositivo afectado.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

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:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-12 CVE Reserved
2020-09-24 CVE Published
2023-03-08 EPSS Updated
2024-09-17 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-cmdinj-2MzhjM6K	2022-10-27

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 Search vendor "Cisco" for product "Ios Xe"	17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-40 Search vendor "Cisco" for product "Catalyst 9800-40"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-80 Search vendor "Cisco" for product "Catalyst 9800-80"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-cl Search vendor "Cisco" for product "Catalyst 9800-cl"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-l Search vendor "Cisco" for product "Catalyst 9800-l"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-l-c Search vendor "Cisco" for product "Catalyst 9800-l-c"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-l-f Search vendor "Cisco" for product "Catalyst 9800-l-f"	-	-	Safe