UBUNTU-CVE-2021-42740

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UBUNTU-CVE-2021-42740

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.

References: https://ubuntu.com/security/CVE-2021-42740, https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abe, https://www.npmjs.com/package/shell-quote, https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173, https://www.cve.org/CVERecord?id=CVE-2021-42740