CVE-2021-27427: RIOT OS Integer Overflow or Wraparound

Published May 3, 2022

Updated

RIOT OS version 2020.01.1 is vulnerable to integer wrap-around in its implementation of calloc function, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Affected Software

30 affected components

RIOT-OS RIOT=2020.01.1

Multiple Amazon FreeRTOS, Version 10.4.1

Multiple Apache Nuttx OS, Version 9.1.0

Multiple ARM CMSIS-RTOS2, versions prior to 2.1.3

Multiple ARM Mbed OS, Version 6.3.0

Multiple ARM mbed-ualloc, Version 1.3.0

Multiple BlackBerry QNX SDP Versions 6.5.0 SP1 and earlier

Multiple BlackBerry QNX OS for Safety Versions 1.0.1 and earlier safety products compliant with IEC 61508 and/or ISO 26262

Multiple BlackBerry QNX OS for Medical Versions 1.1 and earlier safety products compliant with IEC 62304 A full list of affected QNX products and versions is available here

Multiple A full list of affected QNX products and versions is available here

Multiple Cesanta Software Mongoose OS, v2.17.0

Multiple eCosCentric eCosPro RTOS, Versions 2.0.1 through 4.5.3

Multiple Google Cloud IoT Device SDK, Version 1.0.2

Multiple Media Tek LinkIt SDK, versions prior to 4.6.1

Multiple Micrium OS, Versions 5.10.1 and prior

Multiple Micrium uC/OS: uC/LIB Versions 1.38.xx, Version 1.39.00

Multiple NXP MCUXpresso SDK, versions prior to 2.8.2

Multiple NXP MQX, Versions 5.1 and prior

Multiple Redhat newlib, versions prior to 4.0.0

Multiple RIOT OS, Version 2020.01.1

Multiple Samsung Tizen RT RTOS, versions prior 3.0.GBB

Multiple TencentOS-tiny, Version 3.1.0

Multiple Texas Instruments CC32XX, versions prior to 4.40.00.07

Multiple Texas Instruments SimpleLink MSP432E4XX

Multiple Texas Instruments SimpleLink-CC13XX, versions prior to 4.40.00

Multiple Texas Instruments SimpleLink-CC26XX, versions prior to 4.40.00

Multiple Texas Instruments SimpleLink-CC32XX, versions prior to 4.10.03

Multiple Uclibc-NG, versions prior to 1.0.36

Multiple Windriver VxWorks, prior to 7.0

Multiple Zephyr Project RTOS, versions prior to 2.5

Remediation

Information

RIOT OS update available.

Event History

May 3, 2022

CVE Published

via MITRE·08:16 PM

Data Sourced

via MITRE·08:16 PM

RemedyDescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

ICSA-21-119-04

Frequently Asked Questions

What is the severity of CVE-2021-27427?

The severity of CVE-2021-27427 is significant due to its potential to lead to arbitrary memory allocation, crashes, or remote code execution.

How do I fix CVE-2021-27427?

To fix CVE-2021-27427, update RIOT OS to a version after 2020.01.1 that addresses this integer wrap-around vulnerability.

What systems are affected by CVE-2021-27427?

CVE-2021-27427 affects RIOT OS version 2020.01.1 and various other platforms including Amazon FreeRTOS and BlackBerry QNX OS.

What type of vulnerability is CVE-2021-27427?

CVE-2021-27427 is an integer wrap-around vulnerability related to the implementation of the calloc function.

Can CVE-2021-27427 be exploited remotely?

Yes, CVE-2021-27427 can potentially be exploited remotely, leading to memory allocation issues and unauthorized code execution.