CVE-2022-31180: critical vulnerability in ericcornelissen shescape
Insufficient escaping of whitespace in shescape
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 2.0%
Shescape is a simple shell escape package for JavaScript. Affected versions were found to have insufficient escaping of white space when interpolating output. This issue only impacts users that use the `escape` or `escapeAll` functions with the `interpolation` option set to `true`. The result is that if an attacker is able to include whitespace in their input they can: 1. Invoke shell-specific behaviour through shell-specific special characters inserted directly after whitespace. 2. Invoke shell-specific behaviour through shell-specific special characters inserted or appearing after line terminating characters. 3. Invoke arbitrary commands by inserting a line feed character. 4. Invoke arbitrary commands by inserting a carriage return character. Behaviour number 1 has been patched in [v1.5.7] which you can upgrade to now. No further changes are required. Behaviour number 2, 3, and 4 have been patched in [v1.5.8] which you can upgrade to now. No further changes are required. The best workaround is to avoid having to use the `interpolation: true` option - in most cases using an alternative is possible, see [the recipes](https://github.com/ericcornelissen/shescape#recipes) for recommendations. Alternatively, users may strip all whitespace from user input. Note that this is error prone, for example: for PowerShell this requires stripping `'\u0085'` which is not included in JavaScript's definition of `\s` for Regular Expressions.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
ericcornelissen · shescapeRelated CVEs — ericcornelissen shescape
In the same product, most dangerous first.
CVE-2022-36064MEDIUMShescape Inefficient Regular Expression Complexity vulnerabilityEPSS 1.5%CVE-2022-31179HIGHInsufficient escaping of line feeds for CMD in shescapeEPSS 1.4%CVE-2026-73414CRITICALShescape: Shell injection via unescaped parentheses on Windows with CMDEPSS 0.9%CVE-2023-35931LOWShescape potential environment variable exposure on Windows with CMDEPSS 0.8%CVE-2023-40185MEDIUMShescape on Windows escaping may be bypassed in threaded contextEPSS 0.7%CVE-2026-73412MEDIUMShescape: Path disclosure on Unix with ZshEPSS 0.6%
References
https://github.com/ericcornelissen/shescape/pull/322https://github.com/ericcornelissen/shescape/pull/324https://github.com/ericcornelissen/shescape/releases/tag/v1.5.7https://github.com/ericcornelissen/shescape/releases/tag/v1.5.8https://github.com/ericcornelissen/shescape/security/advisories/GHSA-44vr-rwwj-p88h