CVE-2023-40077
📋 TL;DR
This CVE describes a use-after-free vulnerability in Android's MetaDataBase.cpp due to a race condition. It allows remote attackers to escalate privileges without user interaction or additional permissions. All Android devices running vulnerable versions are affected.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to execute arbitrary code with system privileges, potentially installing persistent malware or accessing all user data.
Likely Case
Privilege escalation allowing attacker to gain system-level access to the device, potentially accessing sensitive data or performing unauthorized actions.
If Mitigated
Limited impact if device is patched or has additional security controls like SELinux enforcing strict policies.
🎯 Exploit Status
Exploitation requires race condition triggering which adds complexity, but no authentication or user interaction needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2023 Android Security Patch or later
Vendor Advisory: https://source.android.com/security/bulletin/2023-12-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install December 2023 or later security patch. 3. Reboot device after installation.
🔧 Temporary Workarounds
No effective workarounds
allThis is a core framework vulnerability requiring patching. No configuration changes can mitigate the race condition.
🧯 If You Can't Patch
- Isolate vulnerable devices from untrusted networks and internet access
- Implement strict app installation policies and only allow trusted applications
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security patch level. If before December 2023, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows December 2023 or later date in Settings > About phone > Android version > Security patch level.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts in system logs
- SELinux denials related to MetaDataBase operations
Network Indicators:
- Unusual network connections from system processes
- Exploitation attempts targeting Android framework
SIEM Query:
source="android_system_logs" AND (event="privilege_escalation" OR event="SELinux_denial") AND process="system_server"🔗 References
- https://android.googlesource.com/platform/frameworks/av/+/58fd993a89a3a22fa5a4a1a4548125c6783ec80c
- https://source.android.com/security/bulletin/2023-12-01
- https://android.googlesource.com/platform/frameworks/av/+/58fd993a89a3a22fa5a4a1a4548125c6783ec80c
- https://source.android.com/security/bulletin/2023-12-01
