Remote Code Execution (RCE) Affecting shell-quote package, versions <1.7.3


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.56% (79th percentile)

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  • Snyk IDSNYK-JS-SHELLQUOTE-1766506
  • published22 Oct 2021
  • disclosed22 Oct 2021
  • creditUnknown

Introduced: 22 Oct 2021

CVE-2021-42740  (opens in a new tab)
CWE-94  (opens in a new tab)

How to fix?

Upgrade shell-quote to version 1.7.3 or higher.

Overview

shell-quote is a package used to quote and parse shell commands.

Affected versions of this package are vulnerable to Remote Code Execution (RCE). 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 Scores

version 3.1