CVE-2023-40091
📋 TL;DR
This vulnerability allows local privilege escalation on Android devices through memory corruption in the IncidentService component. An attacker could gain elevated privileges without user interaction or additional execution 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
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to execute arbitrary code with system privileges, access sensitive data, and persist malware.
Likely Case
Local attacker gains elevated privileges to access protected system resources, install malicious apps, or bypass security controls.
If Mitigated
Limited impact with proper patch management and security controls; attacker may still gain some privileges but with reduced scope.
🎯 Exploit Status
Exploitation requires local access but no user interaction. Memory corruption vulnerabilities typically require specific conditions to trigger reliably.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2023 Android Security Patch Level or later
Vendor Advisory: https://source.android.com/security/bulletin/2023-12-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install December 2023 security patch or later. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable IncidentService (Not Recommended)
androidDisabling the vulnerable service may break system functionality and is not officially supported.
adb shell pm disable com.android.incident
🧯 If You Can't Patch
- Restrict physical access to devices and implement strict app installation policies
- Use mobile device management (MDM) solutions to enforce security policies and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check Settings > About phone > Android security patch level. If date is before December 2023, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level shows December 2023 or later date.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts in system logs
- Suspicious access to IncidentService components
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
source="android_system" AND (event="privilege_escalation" OR service="IncidentService") AND severity=HIGH🔗 References
- https://android.googlesource.com/platform/frameworks/base/+/0ec7b119d41adcbba23f9349e16de9e7e11683f6
- https://source.android.com/security/bulletin/2023-12-01
- https://android.googlesource.com/platform/frameworks/base/+/0ec7b119d41adcbba23f9349e16de9e7e11683f6
- https://source.android.com/security/bulletin/2023-12-01
