PT-2021-20079 · Zephyr · Zephyr

D3Zd3Z · Published 2021-10-12 · Updated 2021-10-18 · CVE-2021-3321

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Zephyr versions 2.4.0 and later

Description The issue is related to an integer underflow in Zephyr's IEEE 802154 fragment reassembly header removal, which can lead to a buffer overflow. This is classified as an integer overflow to buffer overflow, CWE-680.

Recommendations For Zephyr versions 2.4.0 and later, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Integer Underflow

Weakness Enumeration

CWE-680

CWE-191

Related Identifiers

CVE-2021-3321

GHSA-W44J-66G7-XW99

Affected Products

Zephyr

References · 4

• 🔥 http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w44j-66g7-xw99 · Exploit
• https://osv.dev/vulnerability/CVE-2021-3321 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3321 · Security Note
• https://t.me/cibsecurity/30472 · Telegram Post