CVE-2022-20043
📋 TL;DR
This Bluetooth vulnerability allows local attackers to escalate privileges without user interaction by exploiting a missing permission check. It affects devices using MediaTek chipsets with vulnerable Bluetooth implementations. Attackers could gain elevated system access from a standard user account.
💻 Affected Systems
- MediaTek chipset-based devices with Bluetooth functionality
📦 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 system compromise allowing attackers to install malware, access sensitive data, or maintain persistent access with system-level privileges.
Likely Case
Local privilege escalation enabling attackers to bypass security controls, access protected system resources, or install unauthorized applications.
If Mitigated
Limited impact if Bluetooth is disabled or devices are properly segmented with strict access controls.
🎯 Exploit Status
Requires local Bluetooth access but no user interaction; exploit likely involves crafted Bluetooth packets targeting the permission check bypass.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware with patch ID ALPS06148177
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/February-2022
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply MediaTek security patch ALPS06148177. 3. Reboot device after update. 4. Verify patch installation through system settings.
🔧 Temporary Workarounds
Disable Bluetooth
androidTurn off Bluetooth functionality to prevent exploitation
adb shell settings put global bluetooth_on 0
Settings > Connections > Bluetooth > Turn Off
Restrict Bluetooth Pairing
androidOnly allow pairing with trusted devices
Settings > Connections > Bluetooth > Pair new device (only with trusted devices)
🧯 If You Can't Patch
- Disable Bluetooth when not in use
- Implement network segmentation to isolate vulnerable devices
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against MediaTek security bulletin; devices without patch ALPS06148177 are vulnerable.Check Version:
adb shell getprop ro.build.fingerprint or Settings > About phone > Build numberVerify Fix Applied:
Verify firmware version includes patch ALPS06148177 in system settings or through manufacturer update verification.📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth pairing attempts
- Privilege escalation events in system logs
- Unexpected process execution with elevated privileges
Network Indicators:
- Suspicious Bluetooth packet patterns
- Unauthorized Bluetooth connections
SIEM Query:
source="bluetooth" AND (event="pairing_attempt" OR event="privilege_escalation")