CVE-2023-40117
📋 TL;DR
This vulnerability allows an attacker with physical access to bypass the Android device lockscreen without authentication. It affects Android devices running vulnerable versions, enabling local privilege escalation to access device data and settings.
💻 Affected Systems
- Android OS
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing unauthorized access to all user data, apps, and settings without any authentication.
Likely Case
Unauthorized access to device data and settings when an attacker has brief physical access to a locked device.
If Mitigated
Limited impact if device encryption is enabled and sensitive data is protected by additional security layers.
🎯 Exploit Status
Exploitation requires physical device access but no user interaction or authentication. The vulnerability is in the SettingsProvider component.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: October 2023 Android Security Patch Level or later
Vendor Advisory: https://source.android.com/security/bulletin/2023-10-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install October 2023 or later security patch. 3. Reboot device after installation.
🔧 Temporary Workarounds
Enable device encryption
androidFull device encryption provides additional protection for stored data even if lockscreen is bypassed
Settings > Security > Encrypt device
Use strong authentication methods
androidImplement biometric authentication or strong PIN/password to add security layers
Settings > Security > Screen lock
🧯 If You Can't Patch
- Implement strict physical security controls for devices
- Enable remote wipe capabilities and device management policies
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security patch levelCheck Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows October 2023 or later date📡 Detection & Monitoring
Log Indicators:
- Multiple failed unlock attempts followed by successful access without proper authentication
- Unusual settings changes without user interaction
Network Indicators:
- None - this is a local physical access vulnerability
SIEM Query:
Search for: 'SettingsProvider' AND 'resetSettingsLocked' in Android system logs🔗 References
- https://android.googlesource.com/platform/frameworks/base/+/ff86ff28cf82124f8e65833a2dd8c319aea08945
- https://android.googlesource.com/platform/packages/apps/Settings/+/11815817de2f2d70fe842b108356a1bc75d44ffb
- https://source.android.com/security/bulletin/2023-10-01
- https://android.googlesource.com/platform/frameworks/base/+/ff86ff28cf82124f8e65833a2dd8c319aea08945
- https://android.googlesource.com/platform/packages/apps/Settings/+/11815817de2f2d70fe842b108356a1bc75d44ffb
- https://source.android.com/security/bulletin/2023-10-01
