CVE-2022-21190 Information

Description

This affects the package convict before 6.2.3. This is a bypass of CVE-2022-22143. The fix 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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/mozilla/node-convict/blob/master/CHANGELOG.md%23623—2022-05-07 https://github.com/mozilla/node-convict/blob/3b86be087d8f14681a9c889d45da7fe3ad9cd880/packages/convict/src/main.js%23L571 https://gist.github.com/dellalibera/cebce20e51410acebff1f46afdc89808 https://snyk.io/vuln/SNYK-JS-CONVICT-2774757 https://github.com/mozilla/node-convict/commit/1ea0ab19c5208f66509e1c43b0d0f21c1fd29b75

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8