Azure C SDK Integer Wraparound Vulnerability

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.

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L

未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)

Azure C Shared Utility 安全漏洞

Azure C Shared Utility是Microsoft Azure开源的一个 C 库。为基本任务（如字符串、列表操作、IO等）提供通用功能。 Azure C Shared Utility 2023-12-01之前版本存在安全漏洞，该漏洞源于允许攻击者利用Azure C SDK中的buffer length参数使参数检查机制出错，导致整数环绕、分配不足或缓冲区溢出，进而导致远程代码执行。

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