PT-2021-4212 · Texas Instruments · Ti-Rtos

Published 2021-04-29 · Updated 2023-12-01 · CVE-2021-22636

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions TI-RTOS versions (affected versions not specified)

Description The issue is caused by an integer overflow in the ti sysbios rts MemAlloc alloc() function, which can allow an attacker to execute arbitrary code or cause a denial of service. When configured to use the HeapMem heap, malloc returns a valid pointer to a small buffer on extremely large values, triggering the integer overflow vulnerability in HeapMem allocUnprotected. This can result in code execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

BDU:2021-04815

CVE-2021-22636

Affected Products

Ti-Rtos

References · 9

• https://bdu.fstec.ru/vul/2021-04815 · Security Note
• https://osv.dev/vulnerability/CVE-2021-22636 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-22636 · Security Note
• https://ti.com/lit/an/swra709/swra709.pdf?ts=1632841610387&ref_url=https%253A%252F%252Fwww.google.com%252F · Note
• https://cisa.gov/news-events/ics-advisories/icsa-21-119-04 · Note
• https://ti.com/lit/an/swra709/swra709.pdf?ts=1632841610387&ref_url=https%253A%252F%252Fwww.google.com%252F · Note
• https://us-cert.cisa.gov/ics/advisories/icsa-21-119-04 · Note
• https://ti.com/tool/TI-RTOS-MCU · Note
• https://t.me/cvenotify/61932 · Telegram Post