ubuntu-cve-2021-42740
Vulnerability from osv_ubuntu
Published
2021-10-21 15:15
Modified
2026-06-09 10:45
Summary
Details

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.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-shell-quote",
            "binary_version": "1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "node-shell-quote",
        "purl": "pkg:deb/ubuntu/node-shell-quote@1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.1+20160617-git72fb5a8ce29b-1",
        "1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2021-42740",
  "modified": "2026-06-09T10:45:58Z",
  "published": "2021-10-21T15:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-42740"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abe"
    },
    {
      "type": "REPORT",
      "url": "https://www.npmjs.com/package/shell-quote"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-42740"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-42740"
  ]
}



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