CVE-2021-22547

Buffer overrun in Google Cloud IoT Device SDK for Embedded C

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.

Category

6.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.03%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: Google LLC Google Cloud IoT Device SDK for Embedded C
Published at:
Updated at:

References

Link Tags
https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/blob/master/RELEASE-NOTES.md third party advisory release notes
https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/pull/119 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-22547?
CVE-2021-22547 has been scored as a medium severity vulnerability.
How to fix CVE-2021-22547?
To fix CVE-2021-22547, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22547 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-22547 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22547?
CVE-2021-22547 affects Google LLC Google Cloud IoT Device SDK for Embedded C.
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