CVE-2021-23906

Severity Score

6.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in the Headunit NTG6 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. A Message Length is not checked in the HiQnet Protocol, leading to remote code execution.

Se detectó un problema en la unidad principal NTG6 del sistema de infoentretenimiento MBUX en los vehículos Mercedes-Benz hasta 2021. No se comprueba la longitud de un mensaje en el protocolo HiQnet, lo que lleva a la ejecución remota de código

*Credits: N/A

CVSS Scores

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Physical

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Physical

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-12 CVE Reserved
2021-05-13 CVE Published
2024-08-03 CVE Updated
2024-08-03 First Exploit
2024-09-15 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation

CAPEC

References (3)

URL	Tag	Source
https://keenlab.tencent.com/en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Security-Assessment-on-Mercedes-Benz-Cars	Third Party Advisory
https://media.daimler.com/marsMediaSite/en/instance/ko.xhtml?oid=49946866	Third Party Advisory

URL	Date	SRC
https://keenlab.tencent.com/en/whitepapers/Mercedes_Benz_Security_Research_Report_Final.pdf	2024-08-03

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mercedes-benz Search vendor "Mercedes-benz"	Mercedes-benz User Experience Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience"	<= 2021 Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience" and version " <= 2021"	-	Affected	in	Mercedes-benz Search vendor "Mercedes-benz"	A 220 Search vendor "Mercedes-benz" for product "A 220"	-	-	Safe
Mercedes-benz Search vendor "Mercedes-benz"	Mercedes-benz User Experience Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience"	<= 2021 Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience" and version " <= 2021"	-	Affected	in	Mercedes-benz Search vendor "Mercedes-benz"	A 220 4matic Search vendor "Mercedes-benz" for product "A 220 4matic"	-	-	Safe
Mercedes-benz Search vendor "Mercedes-benz"	Mercedes-benz User Experience Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience"	<= 2021 Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience" and version " <= 2021"	-	Affected	in	Mercedes-benz Search vendor "Mercedes-benz"	E 350 Search vendor "Mercedes-benz" for product "E 350"	-	-	Safe
Mercedes-benz Search vendor "Mercedes-benz"	Mercedes-benz User Experience Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience"	<= 2021 Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience" and version " <= 2021"	-	Affected	in	Mercedes-benz Search vendor "Mercedes-benz"	E 350 4matic Search vendor "Mercedes-benz" for product "E 350 4matic"	-	-	Safe
Mercedes-benz Search vendor "Mercedes-benz"	Mercedes-benz User Experience Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience"	<= 2021 Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience" and version " <= 2021"	-	Affected	in	Mercedes-benz Search vendor "Mercedes-benz"	Eqc Search vendor "Mercedes-benz" for product "Eqc"	-	-	Safe
Mercedes-benz Search vendor "Mercedes-benz"	Mercedes-benz User Experience Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience"	<= 2021 Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience" and version " <= 2021"	-	Affected	in	Mercedes-benz Search vendor "Mercedes-benz"	Gle 350 Search vendor "Mercedes-benz" for product "Gle 350"	-	-	Safe
Mercedes-benz Search vendor "Mercedes-benz"	Mercedes-benz User Experience Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience"	<= 2021 Search vendor "Mercedes-benz" for product "Mercedes-benz User Experience" and version " <= 2021"	-	Affected	in	Mercedes-benz Search vendor "Mercedes-benz"	Gle 350 4matic Search vendor "Mercedes-benz" for product "Gle 350 4matic"	-	-	Safe