How severe is CVE-2024-29195?

CVE-2024-29195 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2024-29195 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-29195?

CVE-2024-29195 affects Microsoft Azure C Shared Utility. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-29195?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-29195 have an EU (EUVD) identifier?

Yes. CVE-2024-29195 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-26216.

When was CVE-2024-29195 published?

CVE-2024-29195 was published on 2024-03-26 and last updated on 2026-06-17.

CVE-2024-29195

CVE-2024-29195 is a medium-severity vulnerability in Microsoft Azure C Shared Utility with a CVSS 3.x base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-26216
Weakness: CWE-120
Affected product: Microsoft Azure C Shared Utility
Published: 2024-03-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2024-29195?: CVE-2024-29195 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2024-29195 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-29195?: CVE-2024-29195 affects Microsoft Azure C Shared Utility. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-29195?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-29195 have an EU (EUVD) identifier?: Yes. CVE-2024-29195 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-26216.
When was CVE-2024-29195 published?: CVE-2024-29195 was published on 2024-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:azure_c_shared_utility:*:*:*:*:*:*:*:*

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