I would like to report a prototype pollution vulnerability in lodash.
It allows an attacker to inject properties on Object.prototype
Module
module name: lodash
version: 4.17.15
npm page: https://www.npmjs.com/package/lodash
Module Description
The Lodash library exported as Node.js modules.
Module Stats
25,228,177 downloads in the last week
Vulnerability
Vulnerability Description
This is a similar with this vulnerability: https://hackerone.com/reports/380873
The functions merge, mergeWith, and defaultsDeep can be tricked into adding or modifying properties of the Object prototype. These properties will be present on all objects.
Steps To Reproduce:
Craft an object by “zipObjectDeep” function of lodash
const _ = require(‘lodash’);
_.zipObjectDeep([‘proto.z’],[123])
console.log(z) // 123
Variable. Server crash or the server becoming unable to respond to all request is garanteed, but more significant impact like remote code execution can be achieved in some cases.