CVE-2021-40829

low-risk

Published 2021-11-23

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.

Do I need to act?

0.10% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.3/10 Medium

ADJACENT_NETWORK / HIGH complexity

Affected Products (4)

Amazon Web Services Internet Of Things Device Software Development Kit V2

Affected Vendors

Amazon

References (10)

Product 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 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/

/ 100

low-risk

Severity 16/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 10/34 · Low