CVE-2024-20113
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in MediaTek's ccu component that could allow local privilege escalation. Attackers with system execution privileges could exploit this without user interaction to gain elevated access. The vulnerability affects MediaTek devices using the vulnerable ccu component.
💻 Affected Systems
- MediaTek 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
Full system compromise allowing attackers to execute arbitrary code with kernel privileges, potentially leading to persistent backdoors, data theft, or complete device control.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install malware, or access restricted system resources.
If Mitigated
Limited impact if proper access controls and privilege separation are implemented, preventing unauthorized users from reaching the vulnerable component.
🎯 Exploit Status
Exploitation requires system execution privileges but no user interaction. The missing bounds check suggests a relatively straightforward exploitation path for attackers with sufficient privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: ALPS09036814
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/November-2024
Restart Required: Yes
Instructions:
1. Check MediaTek's November 2024 security bulletin for affected devices. 2. Apply the patch with ID ALPS09036814. 3. Reboot the device to ensure the patch is fully applied. 4. Verify the patch installation through system logs or version checks.
🔧 Temporary Workarounds
Restrict system execution privileges
linuxLimit which users and processes can obtain system execution privileges to reduce attack surface
Review and tighten SELinux/AppArmor policies
Implement principle of least privilege for all system services
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized users from obtaining system execution privileges
- Monitor system logs for privilege escalation attempts and unusual process behavior
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against MediaTek's security bulletin. Look for ccu component version in system logs or through vendor-specific diagnostic tools.Check Version:
Device-specific commands vary by manufacturer. Typically: 'getprop ro.build.fingerprint' or checking system update logs for patch application.Verify Fix Applied:
Verify that patch ALPS09036814 is applied through system update logs or by checking the ccu component version post-patch.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts
- Processes accessing ccu component with unexpected parameters
- Kernel panic or system crashes related to memory corruption
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
source="kernel" AND ("ccu" OR "out of bounds" OR "memory corruption")