cve/2021/CVE-2021-22547.md

CVE-2021-22547

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.

POC

Reference

• https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/blob/master/RELEASE-NOTES.md
• https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/pull/119

Github

• https://github.com/jornverhoeven/adrian