GitHub Advisoryadvisory · npm
GHSA-g4rg-993r-mgx7 Improper Neutralization of Special Elements used in a Command in Shell-quote
CRITICAL
Official page ↗
- Aliases
- CVE-2021-42740
- Ecosystem
- npm
- Packages
- shell-quote
- Severity
- Critical
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-77
- Reviewed
- 2022-06-21
Affected packages
• npm shell-quote: >= 1.6.3, < 1.7.3 → fixed in 1.7.3
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.
Related
Alias · CVE (1)
- CVE-2021-42740 The shell-quote package before 1.7.3 for Node.js allows command injection. vulnerability
Weakness · CWE (1)
- CWE-77 Improper Neutralization of Special Elements used in a Command weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-42740 advisory
- https://github.com/ljharb/shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abe web
- https://github.com/ljharb/shell-quote package
- https://github.com/ljharb/shell-quote/blob/master/CHANGELOG.md#173 web
- https://www.npmjs.com/package/shell-quote web