CVE-2024-31331
📋 TL;DR
This vulnerability in Android's PackageManagerService allows a malicious app to hide services from the Settings app through a logic error in setMimeGroup. This could enable local privilege escalation, requiring user interaction for exploitation. Affected systems include Android devices running vulnerable versions.
💻 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 could gain elevated privileges on the device, potentially accessing sensitive data or installing persistent malware.
Likely Case
A malicious app could hide its activities from users, making detection and removal more difficult while performing unauthorized actions.
If Mitigated
With proper app vetting and user awareness, the impact is limited as exploitation requires user interaction and app installation.
🎯 Exploit Status
Exploitation requires developing a malicious app that users must install and interact with. No public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: July 2024 Android Security Patch
Vendor Advisory: https://source.android.com/security/bulletin/2024-07-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install the July 2024 Android security patch. 3. Restart the device after installation.
🔧 Temporary Workarounds
Disable Unknown Sources
androidPrevent installation of apps from unknown sources to reduce attack surface
Settings > Security > Install unknown apps > Disable for all apps
App Vetting
androidOnly install apps from trusted sources like Google Play Store
🧯 If You Can't Patch
- Implement mobile device management (MDM) to control app installations
- Educate users about risks of installing apps from untrusted sources
🔍 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 July 2024 or later📡 Detection & Monitoring
Log Indicators:
- PackageManagerService logs showing unusual setMimeGroup calls
- Apps attempting to hide services from Settings
Network Indicators:
- No direct network indicators as this is a local privilege escalation
SIEM Query:
No standard SIEM query available for this specific local Android vulnerability🔗 References
- https://android.googlesource.com/platform/frameworks/base/+/c8694bbccfb9c19aefed536ea710230107c935eb
- https://source.android.com/security/bulletin/2024-07-01
- https://android.googlesource.com/platform/frameworks/base/+/c8694bbccfb9c19aefed536ea710230107c935eb
- https://source.android.com/security/bulletin/2024-07-01
