CVE-2018-9378
📋 TL;DR
This vulnerability allows local attackers to read uninitialized memory from the Android audio policy service, potentially exposing sensitive information like audio configuration data or memory contents. It affects Android devices running vulnerable versions, requiring no user interaction or special privileges for exploitation.
💻 Affected Systems
- Android
📦 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
Sensitive kernel or system memory contents could be disclosed, potentially revealing cryptographic keys, authentication tokens, or other protected data.
Likely Case
Limited information disclosure of audio service configuration data or adjacent memory contents with minimal practical impact.
If Mitigated
No impact if patched; unpatched systems have limited exposure due to local-only access requirement.
🎯 Exploit Status
Exploitation requires crafting specific IPC transactions to the audio policy service. No public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Patch Level 2018-06-05 or later
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2018-06-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > Advanced > System update. 2. Install Android Security Patch Level 2018-06-05 or later. 3. Reboot device after installation.
🔧 Temporary Workarounds
Restrict local app permissions
androidLimit which apps have access to audio services and system permissions
🧯 If You Can't Patch
- Isolate vulnerable devices from untrusted users and applications
- Monitor for suspicious audio service access patterns or crashes
🔍 How to Verify
Check if Vulnerable:
Check Settings > About phone > Android security patch level. If date is before 2018-06-05, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android Security Patch Level shows 2018-06-05 or later in Settings > About phone.📡 Detection & Monitoring
Log Indicators:
- Unusual audio service crashes
- Excessive BnAudioPolicyService transactions
Network Indicators:
- None - local-only vulnerability
SIEM Query:
Look for process crashes of audioserver or unusual IPC calls to audio policy service