CVE-2022-31180: Insufficient escaping of whitespace in shescape
First published: Mon Aug 01 2022(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](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.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Shescape Project Shescape | >=1.4.0<1.5.8 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://github.com/ericcornelissen/shescape/pull/322
- https://github.com/ericcornelissen/shescape/pull/324
- https://github.com/ericcornelissen/shescape/releases/tag/v1.5.7
- https://github.com/ericcornelissen/shescape/releases/tag/v1.5.8
- https://github.com/ericcornelissen/shescape/security/advisories/GHSA-44vr-rwwj-p88h
Frequently Asked Questions
What is CVE-2022-31180?
CVE-2022-31180 is a vulnerability in the Shescape package for JavaScript that allows for insufficient escaping of white space when interpolating output.
How does CVE-2022-31180 impact users?
CVE-2022-31180 only impacts users that use the `escape` or `escapeAll` functions with the `interpolation` option set to `true`.
What is the severity of CVE-2022-31180?
CVE-2022-31180 has a severity rating of 9.8 (Critical).
How can I fix CVE-2022-31180?
To fix CVE-2022-31180, users should update to version 1.5.8 or later of the Shescape package.
Is there any additional information about CVE-2022-31180?
More information about CVE-2022-31180 can be found in the following references: [GitHub Pull Request #322](https://github.com/ericcornelissen/shescape/pull/322), [GitHub Pull Request #324](https://github.com/ericcornelissen/shescape/pull/324), [GitHub Release v1.5.7](https://github.com/ericcornelissen/shescape/releases/tag/v1.5.7).
- collector/nvd-index
- agent/author
- agent/type
- agent/remedy
- agent/softwarecombine
- agent/references
- agent/weakness
- agent/description
- collector/nvd-api
- agent/software-canonical-lookup-request
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/severity
- agent/title
- agent/tags
- agent/first-publish-date
- agent/event
- vendor/shescape project
- canonical/shescape project shescape
- version/shescape project shescape/1.4.0