CVE-2023-21341
📋 TL;DR
This vulnerability in Android's Permission Manager allows attackers to bypass required permissions without user interaction, potentially gaining elevated local privileges. It affects Android devices running vulnerable versions, allowing malicious apps to access protected system functions they shouldn't have permission to use.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise where an attacker gains full system-level access, potentially installing persistent malware, accessing all user data, and controlling device functions.
Likely Case
Malicious apps gaining unauthorized access to sensitive permissions like camera, microphone, location, or contacts without user knowledge.
If Mitigated
Limited impact if devices are fully patched and app permissions are properly managed through security policies.
🎯 Exploit Status
Exploitation requires a malicious app to be installed on the device. No user interaction needed once app is installed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android 14 security updates (October 2023 or later)
Vendor Advisory: https://source.android.com/docs/security/bulletin/android-14
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install the latest security update. 3. Restart device after installation.
🔧 Temporary Workarounds
Restrict app installations
androidOnly install apps from trusted sources like Google Play Store and disable unknown sources installation
Settings > Security > Install unknown apps > Disable for all apps
Review app permissions
androidRegularly audit and revoke unnecessary app permissions
Settings > Apps > [App Name] > Permissions > Review and disable unnecessary permissions
🧯 If You Can't Patch
- Implement mobile device management (MDM) to control app installations and permissions
- Use Android Enterprise or similar solutions to enforce security policies and app whitelisting
🔍 How to Verify
Check if Vulnerable:
Check Android version and security patch level in Settings > About phone > Android versionCheck Version:
Settings > About phone > Android versionVerify Fix Applied:
Verify security patch level is October 2023 or later in Settings > About phone > Android version📡 Detection & Monitoring
Log Indicators:
- Unusual permission requests in Android system logs
- Apps accessing permissions they shouldn't have based on manifest declarations
Network Indicators:
- Not applicable - local privilege escalation
SIEM Query:
Not applicable for typical Android deployments