Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Shell-Quote Project | Shell-Quote | < 1.7.3 |
Related Weaknesses (CWE)
References
- https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173Third Party Advisory
- https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4PatchThird 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/5799416ed454aa4ec9afafc895b4PatchThird Party Advisory
- https://www.npmjs.com/package/shell-quoteVendor Advisory
FAQ
What is CVE-2021-42740?
CVE-2021-42740 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 outpu...
How severe is CVE-2021-42740?
CVE-2021-42740 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-42740?
Check the references section above for vendor advisories and patch information. Affected products include: Shell-Quote Project Shell-Quote.