CVE Vulnerabilities

CVE-2021-42376

NULL Pointer Dereference

Published: Nov 15, 2021 | Modified: Nov 07, 2023
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
1.9 LOW
AV:L/AC:M/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
4.1 MODERATE
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Ubuntu
NEGLIGIBLE

A NULL pointer dereference in Busyboxs 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.

Weakness

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

Affected Software

Name Vendor Start Version End Version
Busybox Busybox 1.16.0 (including) 1.34.0 (excluding)
Busybox Ubuntu trusty *
Busybox Ubuntu upstream *
Busybox Ubuntu xenial *

Potential Mitigations

References