CVE-2021-40828

TLS hostname validation issues within AWS IoT Device SDKs on Windows

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Connections initialized by the AWS IoT Device SDK v2 for Java (versions prior to 1.3.3), Python (versions prior to 1.5.18), C++ (versions prior to 1.12.7) and Node.js (versions prior to 1.5.1) did not verify server certificate hostname during TLS handshake when overriding Certificate Authorities (CA) in their trust stores on Windows. This issue has been addressed in aws-c-io submodule versions 0.9.13 onward. This issue affects: Amazon Web Services AWS IoT Device SDK v2 for Java versions prior to 1.3.3 on Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 for Python versions prior to 1.5.18 on Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 for C++ versions prior to 1.12.7 on Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 for Node.js versions prior to 1.5.3 on Microsoft Windows.

Las conexiones inicializadas por AWS IoT Device SDK v2 para Java (versiones anteriores a 1.3.3), Python (versiones anteriores a 1.5.18), C++ (versiones anteriores a 1.12.7) y Node.js (versiones anteriores a 1.5.1) no verificaban el nombre de host del certificado del servidor durante el handshake TLS cuando anulaban las autoridades de certificación (CA) en sus almacenes confiable en Windows. Este problema se ha abordado en las versiones 0.9.13 y posteriores del submódulo aws-c-io. Este problema afecta a: Amazon Web Services AWS IoT Device SDK v2 para versiones de Java anteriores a 1.3.3 en Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 para versiones de Python anteriores a 1.5.18 en Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 para versiones de C++ anteriores a 1.12.7 en Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 para versiones de Node.js anteriores a 1.5.3 en Microsoft Windows

*Credits: F-Secure

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

High

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Adjacent

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

2021-09-09 CVE Reserved
2021-11-22 CVE Published
2024-08-04 CVE Updated
2024-08-07 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-295: Improper Certificate Validation

CAPEC

References (5)

URL	Tag	Source
https://github.com/aws/aws-iot-device-sdk-cpp-v2	Product
https://github.com/aws/aws-iot-device-sdk-java-v2	Product
https://github.com/aws/aws-iot-device-sdk-js-v2	Product
https://github.com/aws/aws-iot-device-sdk-python-v2	Product
https://github.com/awslabs/aws-c-io	Product

URL	Date	SRC

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
Amazon Search vendor "Amazon"	Amazon Web Services Aws-c-io Search vendor "Amazon" for product "Amazon Web Services Aws-c-io"	< 0.9.13 Search vendor "Amazon" for product "Amazon Web Services Aws-c-io" and version " < 0.9.13"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Amazon Search vendor "Amazon"	Amazon Web Services Internet Of Things Device Software Development Kit V2 Search vendor "Amazon" for product "Amazon Web Services Internet Of Things Device Software Development Kit V2"	< 1.3.3 Search vendor "Amazon" for product "Amazon Web Services Internet Of Things Device Software Development Kit V2" and version " < 1.3.3"	java	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Amazon Search vendor "Amazon"	Amazon Web Services Internet Of Things Device Software Development Kit V2 Search vendor "Amazon" for product "Amazon Web Services Internet Of Things Device Software Development Kit V2"	< 1.5.1 Search vendor "Amazon" for product "Amazon Web Services Internet Of Things Device Software Development Kit V2" and version " < 1.5.1"	node.js	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Amazon Search vendor "Amazon"	Amazon Web Services Internet Of Things Device Software Development Kit V2 Search vendor "Amazon" for product "Amazon Web Services Internet Of Things Device Software Development Kit V2"	< 1.5.18 Search vendor "Amazon" for product "Amazon Web Services Internet Of Things Device Software Development Kit V2" and version " < 1.5.18"	python	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Amazon Search vendor "Amazon"	Amazon Web Services Internet Of Things Device Software Development Kit V2 Search vendor "Amazon" for product "Amazon Web Services Internet Of Things Device Software Development Kit V2"	< 1.12.7 Search vendor "Amazon" for product "Amazon Web Services Internet Of Things Device Software Development Kit V2" and version " < 1.12.7"	c\+\+	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe