CVE-2021-27433: ARM mbed-ualloc memory library Integer Overflow or Wraparound
First published: Tue May 03 2022(Updated: )
ARM mbed-ualloc memory library version 1.3.0 is vulnerable to integer wrap-around in function mbed_krbs, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.
Credit: ics-cert@hq.dhs.gov
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Arm Mbed | =1.3.0 | |
| Amazon FreeRTOS | ||
| Apache NuttX | ||
| ARM CMSIS-RTOS2 | ||
| Arm Mbed OS | ||
| Arm Mbed ualloc | ||
| QNX | ||
| BlackBerry QNX OS for Safety | ||
| BlackBerry QNX OS for Medical | ||
| QNX | ||
| Mongoose OS | ||
| eCosCentric eCosPro RTOS | ||
| Google Cloud IoT Device SDK | ||
| MediaTek LinkIt SDK | ||
| Micrium OS | ||
| Micrium uC/OS | ||
| NXP MCUXpresso SDK | ||
| NXP MQX | ||
| newlib | ||
| RIOT OS | ||
| Samsung Tizen RT | ||
| TencentOS-tiny | ||
| Texas Instruments SimpleLink CC32XX | ||
| Texas Instruments SimpleLink MSP432E4 SDK | ||
| Texas Instruments SimpleLink CC13X2 SDK | ||
| Texas Instruments SimpleLink CC26XX | ||
| Texas Instruments SimpleLink CC32XX | ||
| uClibc | ||
| Wind River VxWorks | ||
| Zephyr Project RTOS |
Remedy
ARM Mbed OS update available.
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Reference Links
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).
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