CVE-2022-21190
Prototype Pollution
CRITICAL 9.8EPSS 4.0%
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.
- Affected
- convict
- CVSS v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1 SNYK
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS v2.0 NVD
- 7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P - EPSS
- 3.97% chance of exploitation in the next 30 days, 90th percentile
- Published
- 2022-05-13
- Updated
- 2024-09-17
Proof-of-concept exploits (2)
- https://gist.github.com/dellalibera/cebce20e51410acebff1f46afdc89808
- https://snyk.io/vuln/SNYK-JS-CONVICT-2774757
Security advisories
- mozilla/node-convict/blob/3b86be087d8f14681a9c889d45da7fe3ad9cd880/packages/convict/src/m…
- advisories/GHSA-jjf5-wx3j-3fv7