CVE-2023-20954
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on affected Android devices without user interaction. It affects Android versions 11 through 13 due to an out-of-bounds write in the SDP (Service Discovery Protocol) component. Attackers can exploit this to gain full control of vulnerable devices.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, persistent backdoor installation, and device enrollment into botnets.
Likely Case
Remote code execution allowing attackers to install malware, steal sensitive data, or use device for further attacks.
If Mitigated
No impact if patched; limited impact if Bluetooth is disabled or device is isolated from untrusted networks.
🎯 Exploit Status
Exploitation requires Bluetooth proximity or network access to vulnerable device. No user interaction needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin March 2023 patches
Vendor Advisory: https://source.android.com/security/bulletin/2023-03-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install March 2023 security patch or later. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable Bluetooth
androidTurn off Bluetooth to prevent exploitation via SDP protocol
adb shell settings put global bluetooth_on 0
Settings > Connected devices > Connection preferences > Bluetooth > Turn off
Restrict Bluetooth Visibility
androidSet device to non-discoverable mode to reduce attack surface
adb shell settings put global bluetooth_discoverability 0
Settings > Connected devices > Connection preferences > Bluetooth > Device name > Turn off 'Make device discoverable'
🧯 If You Can't Patch
- Disable Bluetooth completely when not in use
- Isolate vulnerable devices from untrusted networks and Bluetooth devices
🔍 How to Verify
Check if Vulnerable:
Check Android version and security patch level in Settings > About phone > Android versionCheck Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level is March 2023 or later in Settings > About phone > Android version📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth SDP requests
- Crash logs from com.android.bluetooth process
- Unexpected process execution following Bluetooth activity
Network Indicators:
- Unusual Bluetooth traffic patterns
- SDP protocol anomalies
- Multiple connection attempts to Bluetooth services
SIEM Query:
source="android_logs" AND (process="com.android.bluetooth" AND (message="*SDP*" OR message="*crash*" OR message="*exception*"))