CVE-2021-27433: ARM mbed-ualloc memory library Integer Overflow or Wraparound

Published May 3, 2022

Updated

ARM mbed-ualloc memory library version 1.3.0 is vulnerable to integer wrap-around in function mbedkrbs, 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

Arm Mbed Ualloc=1.3.0

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

Patch Available

https://github.com/ARMmbed/mbed-os/pull/14408

Information

ARM Mbed OS update available.

Event History

May 3, 2022

CVE Published

via MITRE·08:26 PM

Data Sourced

via MITRE·08:26 PM

RemedyDescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

ICSA-21-119-04

Frequently Asked Questions

What is the vulnerability ID for this ARM mbed-ualloc memory library vulnerability?

The vulnerability ID for this ARM mbed-ualloc memory library vulnerability is CVE-2021-27433.

What is the severity of CVE-2021-27433?

The severity of CVE-2021-27433 is critical, with a severity value of 9.8.

What is the affected software version for CVE-2021-27433?

The affected software version for CVE-2021-27433 is Arm Mbed Ualloc version 1.3.0.

What are the potential consequences of CVE-2021-27433?

The potential consequences of CVE-2021-27433 include arbitrary memory allocation, unexpected behavior such as a crash, or remote code injection/execution.

Are there any references to learn more about CVE-2021-27433?

Yes, you can find more information about CVE-2021-27433 at the following references: [GitHub Pull Request](https://github.com/ARMmbed/mbed-os/pull/14408) and [CISA Advisory](https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04).