CVE-2024-20109
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in the ccu component due to missing bounds checks. It allows local privilege escalation to System privileges without requiring user interaction. Affected systems are those using MediaTek chipsets with vulnerable ccu firmware.
💻 Affected Systems
- MediaTek chipset devices with ccu component
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains full System privileges on the device, potentially compromising the entire system and accessing all data.
Likely Case
Local attackers escalate privileges to System level, enabling installation of persistent malware or data exfiltration.
If Mitigated
With proper access controls and minimal local user accounts, impact is limited to specific compromised accounts.
🎯 Exploit Status
Exploitation requires local access and System execution privileges; no user interaction needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to patch ID ALPS09065928
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/November-2024
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply the patch with ID ALPS09065928. 3. Reboot the device.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and remote local access to vulnerable devices
🧯 If You Can't Patch
- Isolate affected devices from critical networks
- Implement strict access controls and monitor for suspicious local activity
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against MediaTek advisory; no public command availableCheck Version:
Device-specific; typically in Settings > About Phone > Build NumberVerify Fix Applied:
Verify patch ID ALPS09065928 is applied in firmware settings📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- Abnormal ccu process behavior
Network Indicators:
- Unusual outbound connections from System processes
SIEM Query:
Event logs showing local privilege escalation to System level