CVE-2021-42376

Published: Nov 15, 2021Modified: Jun 17, 2026

5.5

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability: 1.8 / Impact: 3.6

Source: NVD

Description

A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.

Affected (13)

Products: Busybox: Busybox · Fedoraproject: Fedora · Netapp: Cloud Backup, Hci Management Node, Solidfire, H300s Firmware, H500s Firmware, H700s Firmware, H300e Firmware, H500e Firmware, H700e Firmware, H410s Firmware

1 product

1 product

10 products

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Busybox Busybox	From 1.16.0 to 1.34.0

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 33
Fedoraproject Fedora	Version 34

Configuration C

3 vulnerable

Vulnerable Software	Affected Versions
Netapp Cloud Backup	All versions
Netapp Hci Management Node	All versions
Netapp Solidfire	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H300s Firmware	All versions

Running on/with	Platform Versions
Netapp H300s	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H500s Firmware	All versions

Running on/with	Platform Versions
Netapp H500s	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H700s Firmware	All versions

Running on/with	Platform Versions
Netapp H700s	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H300e Firmware	All versions

Running on/with	Platform Versions
Netapp H300e	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H500e Firmware	All versions

Running on/with	Platform Versions
Netapp H500e	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H700e Firmware	All versions

Running on/with	Platform Versions
Netapp H700e	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp H410s Firmware	All versions

Running on/with	Platform Versions
Netapp H410s	All versions

Related CWEs

CWE-476

NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

References (10)

https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog

Source: reefs@jfrog.com

https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/

Source: reefs@jfrog.com

Third Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/

Source: reefs@jfrog.com

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/

Source: reefs@jfrog.com

https://security.netapp.com/advisory/ntap-20211223-0002/

Source: reefs@jfrog.com

Third Party Advisory

https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog