1. Home
  2. CVE Database
  3. CVE-2021-22547
MEDIUM · 6.3

CVE-2021-22547

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 th...

Vulnerability 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 Score

6.3

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
GoogleCloud Iot Device Sdk For Embedded C< 1.0.3

Related Weaknesses (CWE)

CWE-120

References

FAQ

What is CVE-2021-22547?

CVE-2021-22547 is a vulnerability with a CVSS score of 6.3 (MEDIUM). 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 th...

How severe is CVE-2021-22547?

CVE-2021-22547 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-22547?

Check the references section above for vendor advisories and patch information. Affected products include: Google Cloud Iot Device Sdk For Embedded C.