CVE-2021-32976

Moxa NPort IAW5000A-I/O Series Serial Device Server Stack-based Buffer Overflow

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.

Cinco desbordamientos de búfer en el servidor web incorporado en la serie Moxa NPort IAW5000A-I/O firmware versión 2.2 o anterior pueden permitir a un atacante remoto iniciar un ataque de denegación de servicio y ejecutar código arbitrario

*Credits: Konstantin Kondratev, Evgeniy Druzhinin and Ilya Karpov of Rostelecom-Solar reported these vulnerabilities to Moxa.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-13 CVE Reserved
2022-04-01 CVE Published
2024-08-03 CVE Updated
2024-11-05 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-121: Stack-based Buffer Overflow
CWE-787: Out-of-bounds Write

CAPEC

References (2)

URL	Tag	Source
https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01	Mitigation

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities	2022-04-11

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Moxa Search vendor "Moxa"	Nport Iaw5150a-6i\/o Firmware Search vendor "Moxa" for product "Nport Iaw5150a-6i\/o Firmware"	<= 2.2 Search vendor "Moxa" for product "Nport Iaw5150a-6i\/o Firmware" and version " <= 2.2"	-	Affected	in	Moxa Search vendor "Moxa"	Nport Iaw5150a-6i\/o Search vendor "Moxa" for product "Nport Iaw5150a-6i\/o"	-	-	Safe
Moxa Search vendor "Moxa"	Nport Iaw5150a-12i\/o Firmware Search vendor "Moxa" for product "Nport Iaw5150a-12i\/o Firmware"	<= 2.2 Search vendor "Moxa" for product "Nport Iaw5150a-12i\/o Firmware" and version " <= 2.2"	-	Affected	in	Moxa Search vendor "Moxa"	Nport Iaw5150a-12i\/o Search vendor "Moxa" for product "Nport Iaw5150a-12i\/o"	-	-	Safe
Moxa Search vendor "Moxa"	Nport Iaw5250a-6i\/o Firmware Search vendor "Moxa" for product "Nport Iaw5250a-6i\/o Firmware"	<= 2.2 Search vendor "Moxa" for product "Nport Iaw5250a-6i\/o Firmware" and version " <= 2.2"	-	Affected	in	Moxa Search vendor "Moxa"	Nport Iaw5250a-6i\/o Search vendor "Moxa" for product "Nport Iaw5250a-6i\/o"	-	-	Safe
Moxa Search vendor "Moxa"	Nport Iaw5250a-12i\/o Firmware Search vendor "Moxa" for product "Nport Iaw5250a-12i\/o Firmware"	<= 2.2 Search vendor "Moxa" for product "Nport Iaw5250a-12i\/o Firmware" and version " <= 2.2"	-	Affected	in	Moxa Search vendor "Moxa"	Nport Iaw5250a-12i\/o Search vendor "Moxa" for product "Nport Iaw5250a-12i\/o"	-	-	Safe