CVE-2021-22547 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8