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OpenAdvisories
High · 7.2 CVE-2021-42379 EUVD-2021-29350GHSA-qg2h-cx9q-v8wg

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 th…

Published Nov 15, 2021 · Updated Nov 3, 2025 · Assigned by JFROG

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 next_input_file function

Affected products

VendorProductAffectedFixed
busybox busybox unspecified – < 1.34.0 1.34.0

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 busybox 1:1.35.0-1 —
Debian 13 busybox 1:1.35.0-1 —
Debian 12 busybox 1:1.35.0-1 —
Debian 11 busybox 1:1.30.1-6+deb11u1 DLA-4019-1
ReleasePackageFixed inAdvisory
Ubuntu 22.04 LTS busybox 1:1.30.1-7ubuntu2 —
Ubuntu 20.04 LTS busybox 1:1.30.1-4ubuntu6.4 USN-5179-1
Ubuntu 18.04 LTS busybox 1:1.27.2-2ubuntu3.4 USN-5179-1
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 16.04 LTS busybox No fix yet —
Ubuntu Pro 14.04 LTS busybox No fix yet —
ReleasePackageFixed inAdvisory
SLES 15 SP4 busybox 1.35.0-150400.3.3.1 SUSE-SU-2022:3959-1
SLES 15 SP3 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SLES 15 SP2 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SLES 15 SP1 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SLES 15 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
Show 20 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 SP5 busybox 1.35.0-4.3.1 SUSE-SU-2022:4253-1
SLES 12 SP4 busybox 1.35.0-4.3.1 SUSE-SU-2022:4253-1
SLES 12 SP3 busybox 1.35.0-4.3.1 SUSE-SU-2022:4253-1
SLES 12 SP2 busybox 1.35.0-4.3.1 SUSE-SU-2022:4253-1
SLES for SAP 15 SP2 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SLES for SAP 15 SP1 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SLES for SAP 15 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SLES for SAP 12 SP5 busybox 1.35.0-4.3.1 SUSE-SU-2022:4253-1
SLES for SAP 12 SP4 busybox 1.35.0-4.3.1 SUSE-SU-2022:4253-1
SLE Real Time 15 SP2 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-2
SLE HPC 15 SP2 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SLE HPC 15 SP1 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SLE HPC 15 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SUSE OpenStack Cloud Crowbar 9 busybox 1.35.0-4.3.1 SUSE-SU-2022:4253-1
SUSE OpenStack Cloud 9 busybox 1.35.0-4.3.1 SUSE-SU-2022:4253-1
SUSE Manager Server 4.1 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SUSE Manager Retail Branch Server 4.1 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SUSE Manager Proxy 4.1 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SUSE Enterprise Storage 7 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
SUSE Enterprise Storage 6 busybox 1.34.1-4.9.1 SUSE-SU-2022:0135-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.4 busybox 1.35.0-150400.3.3.1 SUSE-SU-2022:3959-1
openSUSE Leap 15.3 busybox 1.34.1-4.9.1 openSUSE-SU-2022:0135-1
openSUSE Leap 15.3 virtualbox 6.1.34-lp153.2.27.2 openSUSE-SU-2022:0135-1
openSUSE Leap 15.3 virtualbox-kmp 6.1.34-lp153.2.27.1 openSUSE-SU-2022:0135-1
ReleasePackageFixed inAdvisory
Alpine v3.24 busybox 1.34.0-r0 —
Alpine v3.23 busybox 1.34.0-r0 —
Alpine v3.22 busybox 1.34.0-r0 —
Alpine v3.21 busybox 1.34.0-r0 —
Alpine v3.20 busybox 1.34.0-r0 —
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Alpine v3.19 busybox 1.34.0-r0 —
Alpine v3.18 busybox 1.34.0-r0 —
Alpine v3.17 busybox 1.34.0-r0 —
Alpine v3.16 busybox 1.34.0-r0 —
Alpine v3.15 busybox 1.34.0-r0 —
Alpine v3.14 busybox 1.33.1-r6 —
Alpine v3.13 busybox 1.32.1-r7 —
Alpine v3.12 busybox 1.31.1-r21 —
Alpine v3.11 busybox 1.31.1-r11 —

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 2 (CBL-Mariner) busybox 1.35.0-1 —

Advisories 18

References