Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1nNHJnLTk5M3ItbWd4N84AAqZr

Improper Neutralization of Special Elements used in a Command in Shell-quote

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.

Permalink: https://github.com/advisories/GHSA-g4rg-993r-mgx7
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1nNHJnLTk5M3ItbWd4N84AAqZr
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 2 years ago
Updated: 12 months ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Percentage: 0.00658
EPSS Percentile: 0.79528

Identifiers: GHSA-g4rg-993r-mgx7, CVE-2021-42740
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-42740
• https://www.npmjs.com/package/shell-quote
• https://github.com/ljharb/shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abe
• https://github.com/ljharb/shell-quote/blob/master/CHANGELOG.md#173
• https://github.com/advisories/GHSA-g4rg-993r-mgx7

Repository: https://github.com/ljharb/shell-quote
Blast Radius: 62.4

Affected Packages