CVE-2024-31319
📋 TL;DR
This Android vulnerability allows a malicious app to leak data between user profiles on the same device due to a confused deputy flaw in the notification system. It enables local privilege escalation without requiring user interaction or additional permissions. All Android devices running vulnerable versions are affected.
💻 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
Complete compromise of user data across profiles, including access to sensitive information from other user accounts on the same device.
Likely Case
Unauthorized data access between user profiles, potentially exposing personal information, messages, or app data.
If Mitigated
Limited impact with proper app sandboxing and user profile isolation controls in place.
🎯 Exploit Status
Requires a malicious app to be installed on the device, but no user interaction needed for exploitation once installed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin June 2024 patches
Vendor Advisory: https://source.android.com/security/bulletin/2024-06-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install the June 2024 security patch. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable Unknown Sources
androidPrevent installation of malicious apps from unknown sources
Settings > Security > Install unknown apps > Disable for all apps
Remove Unnecessary User Profiles
androidReduce attack surface by removing unused user profiles
Settings > System > Multiple users > Remove unused profiles
🧯 If You Can't Patch
- Restrict app installations to trusted sources only (Google Play Store)
- Implement mobile device management (MDM) to control app installations and monitor for suspicious behavior
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security patch level. If before June 2024, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows 'June 5, 2024' or later in Settings > About phone > Android version > Security patch level.📡 Detection & Monitoring
Log Indicators:
- Unusual notification service activity between user profiles
- Suspicious app behavior accessing notification channels across users
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for typical Android deployments🔗 References
- https://android.googlesource.com/platform/frameworks/base/+/3cc021bf608fa813a9a40932028fdde2b12a2d5e
- https://source.android.com/security/bulletin/2024-06-01
- https://android.googlesource.com/platform/frameworks/base/+/3cc021bf608fa813a9a40932028fdde2b12a2d5e
- https://source.android.com/security/bulletin/2024-06-01
