CVE-2021-42740
The shell-quote package before 1.7.3 for Node.js allows command injection.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.22% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-77
- Affected
- shell-quote project/shell-quote
- Source
- cve@mitre.org
References
- https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173Third Party Advisory
- https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abePatch, Third Party Advisory
- https://www.npmjs.com/package/shell-quoteVendor Advisory
- https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173Third Party Advisory
- https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abePatch, Third Party Advisory
- https://www.npmjs.com/package/shell-quoteVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.