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Vulnerability · Published Nov 15, 2021 · Assigned by JFROG

CVE-2021-42384

High 7.2

In plain English

A high-severity use-after-free in busybox from busybox. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.7% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.2High
Exploit odds (30 days)2.7%top 13.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the handle_special function

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20busybox1.34.0-r0ALPINE-CVE-2021-42384
Alpine:v3.21busybox1.34.0-r0ALPINE-CVE-2021-42384
Alpine:v3.22busybox1.34.0-r0ALPINE-CVE-2021-42384
Alpine:v3.23busybox1.34.0-r0ALPINE-CVE-2021-42384
Alpine:v3.24busybox1.34.0-r0ALPINE-CVE-2021-42384
Debian:12busybox1:1.35.0-1DEBIAN-CVE-2021-42384
Debian:13busybox1:1.35.0-1DEBIAN-CVE-2021-42384
Debian:14busybox1:1.35.0-1DEBIAN-CVE-2021-42384
Ubuntu:22.04:LTSbusybox1:1.30.1-7ubuntu2UBUNTU-CVE-2021-42384

Affected products (as reported)

VendorProductVersions
busybox busybox unspecified – before 1.34.0

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References