CVE-2020-10071

Insufficient publish message length validation in MQTT

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The Zephyr MQTT parsing code performs insufficient checking of the length field on publish messages, allowing a buffer overflow and potentially remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.

El código de análisis de Zephyr MQTT realiza una comprobación insuficiente del campo de longitud en los mensajes de publicación, lo que permite un desbordamiento del búfer y potencialmente una ejecución de código remota. NCC-ZEP-031 Este problema afecta a: zephyrproject-rtos zephyr versión 2.2.0 y versiones posteriores

*Credits: NCC Group for report

CVSS Scores

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

High

Privileges Required

None

User Interaction

None

Scope

Changed

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

2020-03-04 CVE Reserved
2020-06-05 CVE Published
2024-03-29 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-129: Improper Validation of Array Index

CAPEC

References (4)

URL	Tag	Source
https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment	Third Party Advisory
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082	2020-06-12

URL	Date	SRC
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071	2020-06-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Zephyrproject Search vendor "Zephyrproject"		Zephyr Search vendor "Zephyrproject" for product "Zephyr"				<= 2.2.0 Search vendor "Zephyrproject" for product "Zephyr" and version " <= 2.2.0"		-		Affected