PT-2021-23606 · Busybox+3 · Busybox+3

Published 2021-11-09 · Updated 2025-04-30 · CVE-2021-42377

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

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

Description The issue arises from an attacker-controlled pointer free in Busybox's hush applet, leading to a denial of service and possible code execution when a crafted shell command is processed. This is due to the shell mishandling the &&& string, potentially allowing for remote code execution under rare conditions of filtered command input.

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

DoS

RCE

Weakness Enumeration

CWE-763

CWE-590

Related Identifiers

BDU:2025-05993

CVE-2021-42377

MGASA-2021-0533

OPENSUSE-SU-2022:0135-1

OPENSUSE-SU-2022_0135-1

OPENSUSE-SU-2022_3959-1

OPENSUSE-SU-2024:11738-1

SUSE-SU-2022:0135-1

SUSE-SU-2022:0135-2

SUSE-SU-2022:3959-1

SUSE-SU-2022:4253-1

Affected Products

Busybox

Debian

Red Os

Suse

References · 80

• https://osv.dev/vulnerability/openSUSE-SU-2024:11738-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:3959-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:4253-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-42377 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-42377 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-42377 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0135-2 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-42377 · Security Note
• https://ubuntu.com/security/CVE-2021-42377 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42377 · Security Note
• https://bdu.fstec.ru/vul/2025-05993 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0135-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0533 · Vendor Advisory