CVE-2024-29195

The azure-c-shared-utility is a C library for AMQP/MQTT communication to
Azure Cloud Services. This library may be used by the Azure IoT C SDK for
communication between IoT Hub and IoT Hub devices. An attacker can cause an
integer wraparound or under-allocation or heap buffer overflow due to
vulnerabilities in parameter checking mechanism, by exploiting the buffer
length parameter in Azure C SDK, which may lead to remote code execution.
Requirements for RCE are 1. Compromised Azure account allowing malformed
payloads to be sent to the device via IoT Hub service, 2. By passing IoT
hub service max message payload limit of 128KB, and 3. Ability to overwrite
code space with remote code. Fixed in commit
https://github.com/Azure/azure-c-shared-utility/commit/1129147c38ac02ad974c4c701a1e01b2141b9fe2.

Notes