CVE-2021-22547
Last modified
CVE-2021-22547 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cloud Iot Device Sdk For Embedded C | < 1.0.3 |
References
- https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/blob/master/RELEASE-NOTES.mdRelease Notes, Third Party Advisory
- https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/pull/119Patch, Third Party Advisory
- https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/blob/master/RELEASE-NOTES.mdRelease Notes, Third Party Advisory
- https://github.com/GoogleCloudPlatform/iot-device-sdk-embedded-c/pull/119Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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