CVE-2018-9374
📋 TL;DR
CVE-2018-9374 is an Android permissions bypass vulnerability in the PackageManagerService that allows local privilege escalation. Attackers can install malicious packages with elevated permissions without user interaction. This affects Android devices running vulnerable versions.
💻 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
Complete device compromise allowing installation of persistent malware with system-level permissions, data theft, and backdoor creation.
Likely Case
Local attacker gains elevated privileges to install unwanted applications, modify system settings, or access protected data.
If Mitigated
Limited impact with proper patch management and security controls preventing unauthorized local access.
🎯 Exploit Status
Requires local execution privileges but no user interaction. Exploit details have been publicly analyzed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level 2018-06-01 or later
Vendor Advisory: https://source.android.com/docs/security/bulletin/pixel/2018-06-01
Restart Required: Yes
Instructions:
1. Check current security patch level in Settings > About phone > Android security patch level. 2. If before 2018-06-01, update via Settings > System > System update. 3. Reboot device after update completes.
🔧 Temporary Workarounds
Restrict local app installation
androidDisable installation from unknown sources to prevent malicious package installation
adb shell settings put secure install_non_market_apps 0
🧯 If You Can't Patch
- Implement strict application allowlisting to control which apps can be installed
- Use mobile device management (MDM) to enforce security policies and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone. If date is before 2018-06-01, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Confirm security patch level shows 2018-06-01 or later date after applying update.📡 Detection & Monitoring
Log Indicators:
- PackageManagerService logs showing unexpected package installations
- Security logs with permission escalation attempts
Network Indicators:
- Unusual network traffic from newly installed applications
SIEM Query:
source="android_logs" AND "PackageManagerService" AND "installPackageLI" AND result="SUCCESS"