CVE-2017-13316
📋 TL;DR
CVE-2017-13316 is a local privilege escalation vulnerability in Android's RecognitionService that allows attackers to bypass permission checks. This could enable malicious apps to gain elevated privileges without user interaction. The vulnerability 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
An attacker could gain full system-level access, potentially compromising the entire device, accessing sensitive data, or installing persistent malware.
Likely Case
Malicious apps could gain elevated permissions to access protected system resources, user data, or perform unauthorized actions.
If Mitigated
With proper security controls and patching, the risk is limited to unpatched devices with malicious apps installed.
🎯 Exploit Status
Exploitation requires a malicious app to be installed on the device.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Patch Level 2018-05-01
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2018-05-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > Advanced > System update. 2. Install the May 2018 security patch or later. 3. Reboot the device after installation.
🔧 Temporary Workarounds
Disable unnecessary voice recognition services
androidReduce attack surface by disabling voice recognition features not in use
Restrict app installations
androidOnly install apps from trusted sources like Google Play Store
🧯 If You Can't Patch
- Implement mobile device management (MDM) to control app installations
- Use application allowlisting to prevent unauthorized apps from running
🔍 How to Verify
Check if Vulnerable:
Check Android version and security patch level in Settings > About phone > Android versionCheck Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level is May 2018 or later in Settings > About phone > Android security patch level📡 Detection & Monitoring
Log Indicators:
- Unusual RecognitionService activity
- Permission bypass attempts in system logs
Network Indicators:
- Not applicable - local exploit
SIEM Query:
Not applicable for typical SIEM monitoring of mobile devices