CVE-2020-3423

Cisco IOS XE Software Arbitrary Code Execution Vulnerability

Severity Score

6.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the implementation of the Lua interpreter that is integrated in Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary code with root privileges on the underlying Linux operating system (OS) of an affected device. The vulnerability is due to insufficient restrictions on Lua function calls within the context of user-supplied Lua scripts. An attacker with valid administrative credentials could exploit this vulnerability by submitting a malicious Lua script. When this file is processed, an exploitable buffer overflow condition could occur. A successful exploit could allow the attacker to execute arbitrary code with root privileges on the underlying Linux OS of the affected device.

Una vulnerabilidad en la implementación del intérprete Lua que es integrado en Cisco IOS XE Software, podría permitir a un atacante local autenticado ejecutar código arbitrario con privilegios root en el sistema operativo (SO) subyacente Linux de un dispositivo afectado. La vulnerabilidad es debido a restricciones insuficientes en las llamadas a funciones de Lua dentro del contexto de los scripts de Lua suministrados por el usuario. Un atacante con credenciales administrativas válidas podría explotar esta vulnerabilidad mediante el envío de un script Lua malicioso. Cuando se procesa este archivo, podría ocurrir una condición de desbordamiento de búfer explotable. Una explotación con éxito podría permitir al atacante ejecutar código arbitrario con privilegios root en el sistema operativo Linux subyacente del dispositivo afectado.

*Credits: N/A

CVSS Scores

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

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

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
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

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-lua-rce-7VeJX4f	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 Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	1100 Integrated Services Router Search vendor "Cisco" for product "1100 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	1101 Integrated Services Router Search vendor "Cisco" for product "1101 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	1109 Integrated Services Router Search vendor "Cisco" for product "1109 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	1111x Integrated Services Router Search vendor "Cisco" for product "1111x Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	111x Integrated Services Router Search vendor "Cisco" for product "111x Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	1120 Integrated Services Router Search vendor "Cisco" for product "1120 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	1160 Integrated Services Router Search vendor "Cisco" for product "1160 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	4221 Integrated Services Router Search vendor "Cisco" for product "4221 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	4321 Integrated Services Router Search vendor "Cisco" for product "4321 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	4331 Integrated Services Router Search vendor "Cisco" for product "4331 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	4351 Integrated Services Router Search vendor "Cisco" for product "4351 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	4431 Integrated Services Router Search vendor "Cisco" for product "4431 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	4451-x Integrated Services Router Search vendor "Cisco" for product "4451-x Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	4461 Integrated Services Router Search vendor "Cisco" for product "4461 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1001-hx Search vendor "Cisco" for product "Asr 1001-hx"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1001-x Search vendor "Cisco" for product "Asr 1001-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1002-hx Search vendor "Cisco" for product "Asr 1002-hx"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1002-x Search vendor "Cisco" for product "Asr 1002-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1004 Search vendor "Cisco" for product "Asr 1004"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1006 Search vendor "Cisco" for product "Asr 1006"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1006-x Search vendor "Cisco" for product "Asr 1006-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1009-x Search vendor "Cisco" for product "Asr 1009-x"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Asr 1013 Search vendor "Cisco" for product "Asr 1013"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Cbr-8 Converged Broadband Router Search vendor "Cisco" for product "Cbr-8 Converged Broadband Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Cisco Search vendor "Cisco"	Cloud Services Router 1000v Search vendor "Cisco" for product "Cloud Services Router 1000v"	-	-	Safe