CVE-2024-39428
📋 TL;DR
This vulnerability in the trusty service allows local attackers with system execution privileges to perform an out-of-bounds write, potentially causing denial of service. It affects systems running vulnerable versions of Unisoc trusty service. Attackers need local access and elevated privileges to exploit this flaw.
💻 Affected Systems
- Unisoc trusty service
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or instability leading to persistent denial of service, potentially requiring physical intervention to restore functionality.
Likely Case
Local denial of service affecting the trusty service and dependent applications, requiring system reboot to restore normal operation.
If Mitigated
Minimal impact with proper privilege separation and service isolation in place, limiting blast radius to non-critical components.
🎯 Exploit Status
Requires local access and system execution privileges. No public exploit code identified in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references, but vendor has released security updates
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1807576926177525762
Restart Required: Yes
Instructions:
1. Check with device manufacturer for available security updates. 2. Apply the latest firmware/security patch from your device vendor. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Restrict local system access
allLimit local user accounts with system execution privileges to reduce attack surface
Monitor trusty service behavior
linuxImplement monitoring for trusty service crashes or abnormal behavior
🧯 If You Can't Patch
- Implement strict access controls to limit users with system execution privileges
- Monitor system logs for trusty service crashes or privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor security bulletins. Review if trusty service is present and version information.Check Version:
Device-specific commands vary by manufacturer. Typically check Settings > About Phone > Build Number or use adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level is updated to vendor's recommended version. Check that trusty service is running without crashes.📡 Detection & Monitoring
Log Indicators:
- Trusty service crashes
- Kernel panic logs
- Privilege escalation attempts in system logs
Network Indicators:
- None - local exploitation only
SIEM Query:
source="system_logs" AND ("trusty" OR "TEE") AND ("crash" OR "panic" OR "segfault")