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CVE-2021-42377

Published: 15 November 2021

An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.

Notes

AuthorNote
mdeslaur
1.33.0+

Priority

Low

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
busybox
Launchpad, Ubuntu, Debian
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

bionic Not vulnerable
(1:1.27.2-2ubuntu3.3)
focal Not vulnerable
(1:1.30.1-4ubuntu6.3)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H