CVE-2024-20027
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in MediaTek's 'da' component due to improper input validation. It allows local privilege escalation to System level without requiring user interaction. Affects MediaTek devices using vulnerable versions of their firmware.
💻 Affected Systems
- MediaTek devices with vulnerable 'da' component
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains SYSTEM privileges on the device, enabling complete control, data theft, persistence, and further network compromise.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install malware, or access protected system resources.
If Mitigated
With proper patch management and least privilege principles, impact is limited to isolated systems with minimal lateral movement potential.
🎯 Exploit Status
Exploitation requires local access and SYSTEM execution privileges; no user interaction needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patched in March 2024 security updates
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/March-2024
Restart Required: Yes
Instructions:
1. Check device manufacturer for March 2024 security updates. 2. Apply firmware/OS updates from device manufacturer. 3. Reboot device after update.
🔧 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 monitoring for suspicious local activity
🔍 How to Verify
Check if Vulnerable:
Check device security patch level - if before March 2024, likely vulnerable. Check with device manufacturer for specific firmware version details.Check Version:
On Android: Settings > About phone > Android security patch levelVerify Fix Applied:
Verify security patch level is March 2024 or later. Confirm with manufacturer that specific device model received the ALPS08541632 patch.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation events
- Suspicious daemon/service activity
- Unexpected system process creation
Network Indicators:
- Unusual outbound connections from system processes
- Lateral movement from previously isolated devices
SIEM Query:
Process creation where parent process is system service and command line contains unusual parameters