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CVE-2021-22547 Details

Description

In IoT Devices SDK, there is an implementation of calloc() that doesn't have a length check. An attacker could pass in memory objects larger than the buffer and wrap around to have a smaller buffer than required, allowing the attacker access to the other parts of the heap. We recommend upgrading the Google Cloud IoT Device SDK for Embedded C used to 1.0.3 or greater.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:6.3 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/blob/master/RELEASE-NOTES.md	CVE	Release NotesThird Party Advisory
https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/pull/119	CVE	PatchThird Party Advisory
https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/blob/master/RELEASE-NOTES.md	[email protected]	Release NotesThird Party Advisory
https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/pull/119	[email protected]	PatchThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]

Affected Products

Product	Versions
google cloud iot device sdk for embedded c	< 1.0.3
CPE cpe:2.3:a:google:cloud_iot_device_sdk_for_embedded_c:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
May 7, 2021	Initial Analysis	[email protected]