CVE-2021-26706: Integer Overflow

Published Jan 24, 2022

Updated

An issue was discovered in libmem.c in Micrium uC/OS uC/LIB 1.38.x and 1.39.00. The following memory allocation functions do not check for integer overflow when allocating a pool whose size exceeds the address space: MemPoolCreate, MemDynPoolCreate, and MemDynPoolCreateHW. Because these functions use multiplication to calculate the pool sizes, the operation may cause an integer overflow if the arguments are large enough. The resulting memory pool will be smaller than expected and may be exploited by an attacker.

Affected Software

36 affected components

Micrium Uc\/lib=1.38.00

Micrium Uc\/lib=1.38.01

Micrium Uc\/lib=1.38.02

Micrium Uc\/lib=1.38.03

Micrium Uc\/lib=1.38.04

Micrium Uc\/lib=1.38.05

Micrium Uc\/lib=1.39.00

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

Event History

Jan 24, 2022

CVE Published

via MITRE·12:19 AM

Data Sourced

via MITRE·12:19 AM

Description

Parent advisories

This vulnerability appears in the following advisories.

ICSA-21-119-04

Frequently Asked Questions

What is the severity of CVE-2021-26706?

CVE-2021-26706 has been assigned a high severity score due to the potential for memory allocation issues leading to denial of service or unexpected behaviors.

How do I fix CVE-2021-26706?

To fix CVE-2021-26706, update to the latest version of Micrium uC/LIB that addresses the integer overflow in memory allocation functions.

What versions are affected by CVE-2021-26706?

CVE-2021-26706 affects Micrium uC/LIB versions 1.38.x and 1.39.00.

What kind of vulnerabilities does CVE-2021-26706 represent?

CVE-2021-26706 represents a vulnerability involving integer overflow in memory allocation functions.

Who is impacted by CVE-2021-26706?

Developers and organizations using Micrium uC/LIB 1.38.x or 1.39.00 in their applications are impacted by CVE-2021-26706.