CVE-2018-9377
📋 TL;DR
This vulnerability in Android's ActivityManagerService allows malicious apps to access user metadata through a pending intent flaw. It enables local privilege escalation without requiring user interaction or additional permissions. Affects Android devices running vulnerable versions.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to access sensitive user data, install additional malware, or perform unauthorized actions with elevated privileges.
Likely Case
Malicious app gains access to user metadata and potentially escalates privileges to perform unauthorized actions within the device.
If Mitigated
Limited impact with proper app sandboxing and security controls preventing privilege escalation.
🎯 Exploit Status
Requires malicious app to be installed on device. No user interaction needed for exploitation once app is installed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level 2018-06-05 or later
Vendor Advisory: https://source.android.com/docs/security/bulletin/pixel/2018-06-01
Restart Required: Yes
Instructions:
1. Check current Android security patch level in Settings > About phone > Android security patch level. 2. If before 2018-06-05, update device through Settings > System > System update. 3. Install available updates and restart device.
🔧 Temporary Workarounds
Disable unknown sources
androidPrevent installation of malicious apps from unknown sources
Settings > Security > Unknown sources (toggle OFF)
Restrict app permissions
androidReview and restrict permissions for suspicious apps
Settings > Apps > [App name] > Permissions
🧯 If You Can't Patch
- Isolate vulnerable devices from sensitive networks and data
- Implement mobile device management (MDM) with strict app whitelisting
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android security patch level. If date is before 2018-06-05, device is vulnerable.Check Version:
Settings > About phone > Android security patch levelVerify Fix Applied:
Verify Android security patch level shows 2018-06-05 or later after applying update.📡 Detection & Monitoring
Log Indicators:
- Unusual pending intent activities in system logs
- Suspicious privilege escalation attempts
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Look for Android system logs containing 'ActivityManagerService' and 'getIntentForIntentSender' anomalies