CVE-2022-20012
📋 TL;DR
CVE-2022-20012 is an integer overflow vulnerability in MediaTek's MDP driver that could allow local attackers to execute arbitrary code with kernel privileges. This affects Android devices using MediaTek chipsets. No user interaction is required for exploitation.
💻 Affected Systems
- Android devices with MediaTek chipsets
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent malware, access all user data, and bypass security controls.
Likely Case
Local privilege escalation allowing attackers to gain root access and install malicious applications.
If Mitigated
Limited impact with proper kernel hardening and SELinux policies in place.
🎯 Exploit Status
Requires local access but no special permissions. Kernel exploitation requires specific knowledge of MediaTek driver internals.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: January 2022 Android security patch level
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/January-2022
Restart Required: Yes
Instructions:
1. Apply January 2022 Android security patch from device manufacturer. 2. Update device firmware through official OTA updates. 3. Reboot device after update completes.
🔧 Temporary Workarounds
Disable vulnerable driver module
linuxPrevent loading of the vulnerable MDP driver module
rmmod mdp_driver
echo 'blacklist mdp_driver' >> /etc/modprobe.d/blacklist.conf
🧯 If You Can't Patch
- Restrict physical access to devices and implement strict app installation policies
- Enable SELinux in enforcing mode and implement kernel hardening features
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level: Settings > About phone > Android security patch level. If before January 2022, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level shows January 2022 or later. Check kernel version includes patch ID ALPS05836478.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected MDP driver crashes
- SELinux denials for mdp operations
Network Indicators:
- None (local exploit only)
SIEM Query:
source="android_kernel" AND ("mdp" OR "ALPS05836478") AND ("panic" OR "oops" OR "segfault")