CVE-2018-9430
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on affected Android devices without user interaction by exploiting an out-of-bounds write in Bluetooth stack code. It affects Android devices with vulnerable Bluetooth implementations, particularly Pixel devices and other Android phones running affected versions.
💻 Affected Systems
- Android
- Google Pixel phones
📦 What is this software?
Android by Google
Android by Google
Android by Google
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, and persistent backdoor installation without user interaction.
Likely Case
Remote code execution allowing attacker to gain control of device, access sensitive data, and potentially pivot to other network resources.
If Mitigated
Limited impact if Bluetooth is disabled or device is isolated from untrusted networks, though risk remains if Bluetooth is enabled.
🎯 Exploit Status
No authentication required, but requires Bluetooth access or network proximity. No public exploit code known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level 2018-07-05 or later
Vendor Advisory: https://source.android.com/docs/security/bulletin/pixel/2018-07-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > Advanced > System update. 2. Install July 2018 or later Android security patch. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable Bluetooth
AndroidTurn off Bluetooth to prevent exploitation via this vector
adb shell settings put global bluetooth_on 0
Or manually disable in Settings > Connected devices > Connection preferences > Bluetooth
🧯 If You Can't Patch
- Disable Bluetooth completely on all affected devices
- Segment network to isolate Bluetooth-enabled devices from critical resources
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android security patch level. If date is before 2018-07-05, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows 2018-07-05 or later date after applying update.📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth stack crashes in logcat
- Suspicious Bluetooth pairing attempts from unknown devices
- Abnormal process creation from Bluetooth services
Network Indicators:
- Unexpected Bluetooth connections from unauthorized devices
- Anomalous Bluetooth traffic patterns
SIEM Query:
source="android_logs" "btif_storage" AND ("crash" OR "exception" OR "segfault")