Prototype Pollution Affecting predefine package, versions >=0.0.0 <0.1.3
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
1.24% (86th
percentile)
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Test your applications- Snyk ID SNYK-JS-PREDEFINE-1054935
- published 30 Dec 2020
- disclosed 30 Dec 2020
- credit ohad2712
Introduced: 30 Dec 2020
CVE-2020-28280 Open this link in a new tabHow to fix?
Upgrade predefine to version 0.1.3 or higher.
Overview
predefine is a Predefine your Object.defineProperties to create a more human readable API.
Affected versions of this package are vulnerable to Prototype Pollution. It allows an attacker to cause a denial of service and may lead to remote code execution.
PoC:
const predefine = require('predefine');
predefine.merge({}, JSON.parse('{"__proto__": {"a": "b"}}'));
console.log(({}).a === 'b' ? 'exploitable' : 'unexploitable'); // exploitable
References
CVSS Scores
version 3.1