PT-2022-9819 · Arm · Arm Cmsis Rtos2

Published 2022-05-03 · Updated 2022-05-13 · CVE-2021-27431

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions ARM CMSIS RTOS2 versions prior to 2.1.3

Description The issue is related to an integer wrap-around in the osRtxMemoryAlloc function, which is a local equivalent of the malloc function. This can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or injected code execution.

Recommendations For ARM CMSIS RTOS2 versions prior to 2.1.3, update to version 2.1.3 or later to resolve the issue. As a temporary workaround, consider restricting the use of the osRtxMemoryAlloc function to minimize the risk of exploitation.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2021-27431

Affected Products

Arm Cmsis Rtos2

References · 5

• https://osv.dev/vulnerability/CVE-2021-27431 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27431 · Security Note
• https://t.me/cibsecurity/41853 · Telegram Post
• https://cisa.gov/uscert/ics/advisories/icsa-21-119-04 · Note
• https://t.me/cvenotify/29656 · Telegram Post