CVE-2023-40108
📋 TL;DR
CVE-2023-40108 is an Android vulnerability that allows unauthorized access to another user's media content due to missing permission checks. This could lead to local information disclosure without requiring additional privileges or user interaction. The vulnerability affects Android devices with multiple user profiles.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local access could access sensitive photos, videos, or documents belonging to other users on the same device, potentially exposing private information.
Likely Case
Malicious apps or users could access media files from other user profiles on shared devices, compromising privacy but not system integrity.
If Mitigated
With proper user isolation and app sandboxing, impact is limited to media files accessible through vulnerable interfaces only.
🎯 Exploit Status
Exploitation requires local access or malicious app installation. No user interaction needed once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin January 2025 or later
Vendor Advisory: https://source.android.com/security/bulletin/2025-01-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install the January 2025 security patch or later. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable multiple user profiles
androidRemove additional user profiles to eliminate the attack surface
Settings > System > Multiple users > Remove additional users
Restrict app permissions
androidReview and restrict media access permissions for all apps
Settings > Apps > [App Name] > Permissions > Deny Media/Files access
🧯 If You Can't Patch
- Isolate sensitive media to secure folders or encrypted storage
- Use device management policies to restrict app installations and user profile creation
🔍 How to Verify
Check if Vulnerable:
Check Android version in Settings > About phone > Android version. If running Android 11-14 with January 2025 patch not applied, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level in Settings > About phone > Android version. Should show 'Security patch level: January 5, 2025' or later.📡 Detection & Monitoring
Log Indicators:
- Unusual media access patterns across user profiles
- Permission denial logs for media access attempts
Network Indicators:
- Not applicable - local vulnerability only
SIEM Query:
Not applicable for typical SIEM monitoring as this is a local device vulnerability