PT-2021-5545 · Busybox+5 · Busybox+5

Published 2021-11-15 · Updated 2026-03-13 · CVE-2021-42380

Positive Technologies (AI Summary)

CVSS v3.1

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Busybox (affected versions not specified)

Description A use-after-free issue in Busybox's awk applet can lead to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function. This can be exploited by a remote attacker to execute arbitrary code in the target system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

AZL-6347

BDU:2021-06395

CVE-2021-42380

DLA-4019-1

MGASA-2021-0533

OESA-2021-1449

OPENSUSE-SU-2022:0135-1

OPENSUSE-SU-2022_0135-1

OPENSUSE-SU-2022_3959-1

SUSE-SU-2022:0135-1

SUSE-SU-2022:0135-2

SUSE-SU-2022:3959-1

SUSE-SU-2022:4253-1

SUSE-SU-2026:0872-1

SUSE-SU-2026:0892-1

USN-5179-1

Affected Products

Astra Linux

Busybox

Linuxmint

Red Os

Suse

Ubuntu

References · 129

• https://osv.dev/vulnerability/UBUNTU-CVE-2021-42380 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5179-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-42380 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42383 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2022:0135-2 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1449 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42381 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-42380 · Security Note
• https://osv.dev/vulnerability/ALPINE-CVE-2021-42380 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-42380 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5179-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-42385 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-42380 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-42380 · Vendor Advisory