CVE-2022-21190: Prototype Pollution
First published: Fri May 13 2022(Updated: )
This affects the package convict before 6.2.3. This is a bypass of [CVE-2022-22143](https://security.snyk.io/vuln/SNYK-JS-CONVICT-2340604). The [fix](https://github.com/mozilla/node-convict/commit/3b86be087d8f14681a9c889d45da7fe3ad9cd880) introduced, relies on the startsWith method and does not prevent the vulnerability: before splitting the path, it checks if it starts with __proto__ or this.constructor.prototype. To bypass this check it's possible to prepend the dangerous paths with any string value followed by a dot, like for example foo.__proto__ or foo.this.constructor.prototype.
Credit: report@snyk.io
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Convict | <6.2.3 |
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://gist.github.com/dellalibera/cebce20e51410acebff1f46afdc89808
- https://github.com/mozilla/node-convict/blob/3b86be087d8f14681a9c889d45da7fe3ad9cd880/packages/convict/src/main.js%23L571
- https://github.com/mozilla/node-convict/blob/master/CHANGELOG.md%23623---2022-05-07
- https://github.com/mozilla/node-convict/commit/1ea0ab19c5208f66509e1c43b0d0f21c1fd29b75
- https://snyk.io/vuln/SNYK-JS-CONVICT-2774757
- collector/nvd-index
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/last-modified-date
- agent/references
- agent/title
- agent/author
- agent/severity
- agent/weakness
- agent/softwarecombine
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/mozilla
- canonical/mozilla convict