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CVE-2021-42375

Published: 15 November 2021

An incorrect handling of a special element in Busybox's ash applet leads to denial of service when processing a crafted shell command, due to the shell mistaking specific characters for reserved characters. This may be used for DoS under rare conditions of filtered command input.

Notes

AuthorNote
mdeslaur
1.33.1 only

Priority

Negligible

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
busybox
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(1:1.27.2-2ubuntu3.3)
focal Not vulnerable
(1:1.30.1-4ubuntu6.3)
hirsute Not vulnerable
(1:1.30.1-6ubuntu2)
impish Not vulnerable
(1:1.30.1-6ubuntu3)
jammy Not vulnerable
(1:1.30.1-6ubuntu3)
trusty Not vulnerable

upstream
Released (1.34.0)
xenial Not vulnerable

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H