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CVE-2024-29195— Azure C SDK Integer Wraparound Vulnerability

Quick assessment

Affected
Azure azure-c-shared-utility
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 6.0 · Medium EPSS 4.97% · P92
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I. Basic Information for CVE-2024-29195

Vulnerability Information
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Vulnerability Title
Azure C SDK Integer Wraparound Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Azure C Shared Utility 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Azure azure-c-shared-utility < 2024-02-08 -

II. Public POCs for CVE-2024-29195

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III. Intelligence Information for CVE-2024-29195

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Patches & Fixes for CVE-2024-29195 (1)

Vendor Advisories for CVE-2024-29195 (1)

IV. Related Vulnerabilities

Same product: azure-c-shared-utility
Same vendor: Azure
Same weakness: CWE-120

V. Comments for CVE-2024-29195

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