CVE-2022-31180: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
(updated )
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 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.
References
- github.com/ericcornelissen/shescape/pull/322
- github.com/ericcornelissen/shescape/pull/324
- github.com/ericcornelissen/shescape/releases/tag/v1.5.7
- github.com/ericcornelissen/shescape/releases/tag/v1.5.8
- github.com/ericcornelissen/shescape/security/advisories/GHSA-44vr-rwwj-p88h
- nvd.nist.gov/vuln/detail/CVE-2022-31180
Detect and mitigate CVE-2022-31180 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →