PT-2021-20098 · Zephyr · Zephyr

Published 2021-10-12 · Updated 2021-10-18 · CVE-2021-3330

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 linked-list corruption, leading to a large out-of-bounds write while sorting for a forged fragment list in Zephyr. This results in an Out-of-bounds Write (CWE-787), which can cause remote code execution (RCE) or denial of service (DOS).

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

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-3330

GHSA-FJ4R-373F-9456

Affected Products

Zephyr

References · 4

• 🔥 http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fj4r-373f-9456 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-3330 · Security Note
• https://osv.dev/vulnerability/CVE-2021-3330 · Vendor Advisory
• https://t.me/cibsecurity/30471 · Telegram Post