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CVE-2021-42740

Published: 21 October 2021

The shell-quote package before 1.7.3 for Node.js allows command injection. An attacker can inject unescaped shell metacharacters through a regex designed to support Windows drive letters. If the output of this package is passed to a real shell as a quoted argument to a command with exec(), an attacker can inject arbitrary commands. This is because the Windows drive letter regex character class is {A-z] instead of the correct {A-Za-z]. Several shell metacharacters exist in the space between capital letter Z and lower case letter a, such as the backtick character.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
node-shell-quote
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

hirsute Does not exist

impish Does not exist

jammy Not vulnerable
(1.7.3+~1.7.1-1)
kinetic Not vulnerable
(1.7.3+~1.7.1-1)
lunar Not vulnerable
(1.7.3+~1.7.1-1)
mantic Not vulnerable
(1.7.3+~1.7.1-1)
noble Not vulnerable
(1.7.3+~1.7.1-1)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Ignored
(end of standard support)

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