CVE-2022-20222
📋 TL;DR
This critical vulnerability in Android's Bluetooth stack allows remote attackers to execute arbitrary code without user interaction. It affects Android 12 and 12L devices, enabling complete device compromise through a missing bounds check in the GATT database component.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise with remote code execution leading to data theft, persistence, and lateral movement within networks.
Likely Case
Remote code execution leading to malware installation, data exfiltration, and device control.
If Mitigated
Limited impact if Bluetooth is disabled or devices are isolated from untrusted networks.
🎯 Exploit Status
No authentication or user interaction required, making exploitation straightforward for attackers with Bluetooth proximity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin July 2022 patches
Vendor Advisory: https://source.android.com/security/bulletin/2022-07-01
Restart Required: Yes
Instructions:
1. Apply July 2022 Android security patches. 2. Update device through Settings > System > System update. 3. Reboot device after update completes.
🔧 Temporary Workarounds
Disable Bluetooth
androidTurn off Bluetooth to prevent exploitation via this vector
adb shell settings put global bluetooth_on 0
Settings > Connected devices > Connection preferences > Bluetooth > Toggle off
🧯 If You Can't Patch
- Disable Bluetooth completely on affected devices
- Isolate vulnerable devices from networks containing sensitive data
🔍 How to Verify
Check if Vulnerable:
Check Android version: Settings > About phone > Android version. If version is 12 or 12L without July 2022 patches, device is vulnerable.Check Version:
adb shell getprop ro.build.version.releaseVerify Fix Applied:
Verify Android security patch level includes July 2022: Settings > About phone > Android security patch level.📡 Detection & Monitoring
Log Indicators:
- Bluetooth stack crashes in logcat
- Unexpected GATT service requests
- Memory corruption errors in system logs
Network Indicators:
- Unusual Bluetooth connection attempts from unknown devices
- Excessive GATT characteristic writes
SIEM Query:
source="android_logs" AND ("gatt_db" OR "Bluetooth" AND "crash")