CVE-2022-21190

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.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/mozilla/node-convict/blob/master/CHANGELOG.md%23623---2022-05-07	Broken Link Release Notes Tool Signature
https://github.com/mozilla/node-convict/blob/3b86be087d8f14681a9c889d45da7fe3ad9cd880/packages/convict/src/main.js%23L571	Broken Link Patch Third Party Advisory
https://gist.github.com/dellalibera/cebce20e51410acebff1f46afdc89808	Exploit Third Party Advisory
https://snyk.io/vuln/SNYK-JS-CONVICT-2774757	Exploit Third Party Advisory
https://github.com/mozilla/node-convict/commit/1ea0ab19c5208f66509e1c43b0d0f21c1fd29b75	Patch Tool Signature

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Configurations

Configuration 1 (hide)

cpe:2.3:a:mozilla:convict:*:*:*:*:*:node.js:*:*

Information

Published : 2022-05-13 13:15

Updated : 2022-05-24 07:11

NVD link : CVE-2022-21190

Mitre link : CVE-2022-21190

JSON object : View

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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Products Affected

mozilla

convict

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