CVE-2021-40829

TLS hostname validation issues within AWS IoT Device SDKs on macOS

Description

Connections initialized by the AWS IoT Device SDK v2 for Java (versions prior to 1.4.2), Python (versions prior to 1.6.1), C++ (versions prior to 1.12.7) and Node.js (versions prior to 1.5.3) did not verify server certificate hostname during TLS handshake when overriding Certificate Authorities (CA) in their trust stores on MacOS. This issue has been addressed in aws-c-io submodule versions 0.10.5 onward. This issue affects: Amazon Web Services AWS IoT Device SDK v2 for Java versions prior to 1.4.2 on macOS. Amazon Web Services AWS IoT Device SDK v2 for Python versions prior to 1.6.1 on macOS. Amazon Web Services AWS IoT Device SDK v2 for C++ versions prior to 1.12.7 on macOS. Amazon Web Services AWS IoT Device SDK v2 for Node.js versions prior to 1.5.3 on macOS. Amazon Web Services AWS-C-IO 0.10.4 on macOS.

Remediation

Solution:

  • Update to the latest versions of the AWS IoT Device SDK.

Category

6.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.10%
Affected: Amazon Web Services AWS IoT Device SDK v2 for Java
Affected: Amazon Web Services AWS IoT Device SDK v2 for Python
Affected: Amazon Web Services AWS IoT Device SDK v2 for C++
Affected: Amazon Web Services AWS IoT Device SDK v2 for Node.js
Affected: Amazon Web Services AWS-C-IO
Published at:
Updated at:

References

Link Tags
https://github.com/awslabs/aws-c-io/ product
https://github.com/aws/aws-iot-device-sdk-cpp-v2 product
https://github.com/aws/aws-iot-device-sdk-python-v2 product
https://github.com/aws/aws-iot-device-sdk-java-v2 product
https://github.com/aws/aws-iot-device-sdk-js-v2 product

Frequently Asked Questions

What is the severity of CVE-2021-40829?
CVE-2021-40829 has been scored as a medium severity vulnerability.
How to fix CVE-2021-40829?
To fix CVE-2021-40829: Update to the latest versions of the AWS IoT Device SDK.
Is CVE-2021-40829 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-40829 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-40829?
CVE-2021-40829 affects Amazon Web Services AWS IoT Device SDK v2 for Java , Amazon Web Services AWS IoT Device SDK v2 for Python, Amazon Web Services AWS IoT Device SDK v2 for C++, Amazon Web Services AWS IoT Device SDK v2 for Node.js, Amazon Web Services AWS-C-IO.
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