CVE-2021-40830 – Inconsistent CA override function behavior within AWS IoT Device SDKs on Unix systems

https://notcve.org/view.php?id=CVE-2021-40830

22 Nov 2021 — The AWS IoT Device SDK v2 for Java, Python, C++ and Node.js appends a user supplied Certificate Authority (CA) to the root CAs instead of overriding it on Unix systems. TLS handshakes will thus succeed if the peer can be verified either from the user-supplied CA or the system’s default trust-store. Attackers with access to a host’s trust stores or are able to compromise a certificate authority already in the host's trust store (note: the attacker must also be able to spoof DNS in this case) may be able to u... • https://github.com/aws/aws-iot-device-sdk-cpp-v2 • CWE-295: Improper Certificate Validation •