Remote code execution in Amazon FreeRTOS

Published: 2021-04-30 | Updated: 2022-01-26

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-31572 CVE-2021-31571
CWE-ID	CWE-190
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	FreeRTOS Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU52769

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-31572

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in stream_buffer.c for a stream buffer. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeRTOS: 10.0.0 - 10.4.2

External links

http://ics-cert.us-cert.gov/advisories/icsa-21-119-04

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Integer overflow

EUVDB-ID: #VU52768