GeezerVison

Sourced from The GitHub Security Advisory Database.

Prototype Pollution

Overview

The ini npm package before version 1.3.6 has a Prototype Pollution vulnerability.

If an attacker submits a malicious INI file to an application that parses it with ini.parse, they will pollute the prototype on the application. This can be exploited further depending on the context.

Patches

This has been patched in 1.3.6

Steps to reproduce

payload.ini

[__proto__]
polluted = "polluted"

poc.js:

var fs = require('fs')
</tr></table> ... (truncated)
Affected versions: < 1.3.6

• a2c5da8 1.3.8
• af5c6bb Do not use Object.create(null)
• 8b648a1 don't test where our devdeps don't even work
• c74c8af 1.3.7
• 024b8b5 update deps, add linting
• 032fbaf Use Object.create(null) to avoid default object property hazards
• 2da9039 1.3.6
• cfea636 better git push script, before publish instead of after
• 56d2805 do not allow invalid hazardous string as section name
• See full diff in compare view

This version was pushed to npm by isaacs, a new releaser for ini since your current version.

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