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CVE-2021-42376

Published: 15 November 2021

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.

Notes

AuthorNote
mdeslaur
hush is not build in Ubuntu packages.

Priority

Negligible

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
busybox
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not compiled)
focal Not vulnerable
(code not compiled)
hirsute Not vulnerable
(code not compiled)
impish Not vulnerable
(code not compiled)
jammy Not vulnerable
(code not compiled)
upstream
Released (1.34.0)
trusty Not vulnerable
(code not compiled)
xenial Not vulnerable
(code not compiled)

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