CVE-2019-9473
📋 TL;DR
This Bluetooth vulnerability in Android 10 allows attackers to read memory beyond intended boundaries without user interaction, potentially exposing sensitive information. It affects all Android 10 devices with Bluetooth enabled, requiring no special privileges for exploitation.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker could read sensitive memory contents including authentication tokens, encryption keys, or personal data from nearby Android devices with Bluetooth enabled.
Likely Case
Information disclosure of nearby device data, potentially including device identifiers, connection information, or limited memory contents.
If Mitigated
No impact if patched or Bluetooth disabled; limited impact if attacker lacks proximity to target device.
🎯 Exploit Status
Requires Bluetooth proximity and knowledge of the vulnerability; no authentication needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Patch Level 2020-02-01 or later
Vendor Advisory: https://source.android.com/security/bulletin/android-10
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > Advanced > System update. 2. Install available security updates. 3. Restart device after installation.
🔧 Temporary Workarounds
Disable Bluetooth
androidTurn off Bluetooth when not in use to prevent exploitation
Settings > Connected devices > Connection preferences > Bluetooth > Toggle off
Limit Bluetooth Visibility
androidSet Bluetooth to non-discoverable mode to reduce attack surface
Settings > Connected devices > Connection preferences > Bluetooth > Device name > Turn off 'Make device discoverable'
🧯 If You Can't Patch
- Disable Bluetooth functionality entirely when not required
- Implement physical security controls to limit Bluetooth proximity to untrusted devices
🔍 How to Verify
Check if Vulnerable:
Check Android version: Settings > About phone > Android version. If it shows '10' and security patch level is before February 2020, device is vulnerable.Check Version:
adb shell getprop ro.build.version.releaseVerify Fix Applied:
Verify Android Security Patch Level is 2020-02-01 or later in Settings > About phone > Android security patch level📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth connection attempts
- Multiple failed pairing attempts from unknown devices
- Bluetooth stack crashes or anomalies
Network Indicators:
- Suspicious Bluetooth traffic patterns
- Unexpected Bluetooth device discovery requests
SIEM Query:
Not typically applicable for Bluetooth-based attacks as they don't traverse network monitoring points