CVE-2021-42740
Last modified
CVE-2021-42740 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 4.34% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Shell-Quote Project | Shell-Quote | < 1.7.3 |
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
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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