CVE-2021-0598
📋 TL;DR
This vulnerability allows attackers to trick users into pairing with malicious Bluetooth devices through a tapjacking/overlay attack. It affects Android devices running versions 8.1 through 11, requiring user interaction but no special permissions. Successful exploitation could lead to local privilege escalation.
💻 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
Attacker gains unauthorized access to device via malicious Bluetooth pairing, potentially leading to data theft, surveillance, or further exploitation.
Likely Case
User accidentally pairs with attacker-controlled Bluetooth device, enabling data interception or unauthorized access to Bluetooth-connected services.
If Mitigated
With proper user awareness and Bluetooth security settings, risk is limited to isolated incidents with minimal impact.
🎯 Exploit Status
Requires user interaction (tapping on malicious overlay) and physical proximity within Bluetooth range.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin September 2021 patches
Vendor Advisory: https://source.android.com/security/bulletin/2021-09-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install the September 2021 security patch or later. 3. Restart device after installation.
🔧 Temporary Workarounds
Disable Bluetooth when not in use
androidTurn off Bluetooth to prevent pairing attacks
Settings > Connected devices > Connection preferences > Bluetooth > Toggle off
Enable 'Require authentication for pairing'
androidAdds confirmation step for Bluetooth pairing requests
Settings > Connected devices > Connection preferences > Bluetooth > Advanced > Require authentication for pairing
🧯 If You Can't Patch
- Disable Bluetooth completely in device settings
- Educate users to avoid accepting unexpected Bluetooth pairing requests
🔍 How to Verify
Check if Vulnerable:
Check Android version in Settings > About phone > Android version. If version is 8.1, 9, 10, or 11 without September 2021 patches, device is vulnerable.Check Version:
Settings > About phone > Android versionVerify Fix Applied:
Verify Android security patch level is September 2021 or later in Settings > About phone > Android security patch level.📡 Detection & Monitoring
Log Indicators:
- Unexpected Bluetooth pairing events in system logs
- Multiple failed pairing attempts from unknown devices
Network Indicators:
- Unusual Bluetooth device connections
- Bluetooth connections to unknown MAC addresses
SIEM Query:
source="android_system" event="bluetooth_pairing" device_name="*malicious*" OR device_mac="*suspicious*"