CVE-2020-0471
📋 TL;DR
CVE-2020-0471 is a critical Bluetooth vulnerability in Android that allows a nearby attacker to inject packets into encrypted Bluetooth connections without authentication. This could enable remote privilege escalation between Bluetooth devices. Affects Android versions 8.0 through 11.
💻 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
Attacker gains full control over victim's device via Bluetooth, potentially installing malware, stealing data, or executing arbitrary code.
Likely Case
Attacker intercepts or manipulates Bluetooth communications, potentially accessing sensitive data or disrupting device functionality.
If Mitigated
With Bluetooth disabled or devices patched, no impact occurs as the attack vector is eliminated.
🎯 Exploit Status
Exploitation requires Bluetooth proximity and specialized tools, but no authentication or user interaction.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin January 2021 patches
Vendor Advisory: https://source.android.com/security/bulletin/2021-01-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > Advanced > System update. 2. Install January 2021 or later security patch. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable Bluetooth
androidTurn off Bluetooth when not in use to eliminate attack vector
Settings > Connected devices > Connection preferences > Bluetooth > Toggle off
Restrict Bluetooth Visibility
androidSet Bluetooth to non-discoverable mode to reduce attack surface
Settings > Connected devices > Connection preferences > Bluetooth > Device name > Turn off 'Make device visible'
🧯 If You Can't Patch
- Disable Bluetooth completely when not actively using Bluetooth devices
- Use devices in secure environments away from untrusted Bluetooth ranges
🔍 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 January 2021 or later in Settings > About phone > Android security patch level📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth pairing attempts
- Suspicious Bluetooth packet injection in system logs
Network Indicators:
- Anomalous Bluetooth traffic patterns
- Unexpected Bluetooth connection attempts
SIEM Query:
source="android_system" AND (event="bluetooth_injection" OR event="packet_fragmenter_anomaly")