Arbitrary Code Execution Affecting pixl-class package, versions <1.0.3
Snyk CVSS
Attack Complexity
Low
Confidentiality
High
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.35% (68th
percentile)
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Test your applications- Snyk ID SNYK-JS-PIXLCLASS-564968
- published 9 Apr 2020
- disclosed 10 Mar 2020
- credit JHU System Security Lab
Introduced: 10 Mar 2020
CVE-2020-7640 Open this link in a new tabHow to fix?
Upgrade pixl-class to version 1.0.3 or higher.
Overview
pixl-class is a library that allows you to create classes in a more classical sort of way, including support for static class members, proper constructors, inheritance, and mixins.
Affected versions of this package are vulnerable to Arbitrary Code Execution. The injection point is located in line 26 in the index file class.js; the members argument of the create function can be controlled by users without any sanitization.
POC
var a = require("pixl-class");
var members = {
__parent:'function(){}; console.log(123)//}'
}
a.create(members);