CVE-2021-42740 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abe https://www.npmjs.com/package/shell-quote https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8