CVE-2024-20029
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in MediaTek wlan firmware due to improper input validation. It allows local attackers to escalate privileges to System level without user interaction. Devices using affected MediaTek chipsets with vulnerable firmware versions are at risk.
💻 Affected Systems
- MediaTek wlan firmware
📦 What is this software?
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with kernel-level code execution, allowing attackers to install persistent malware, steal sensitive data, or disable security controls.
Likely Case
Local privilege escalation enabling attackers to bypass application sandboxes, access protected system resources, or install unauthorized applications.
If Mitigated
Limited impact with proper network segmentation, least privilege principles, and security monitoring in place.
🎯 Exploit Status
Requires local access and System execution privileges to exploit. No public exploit code available as of advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware with Patch ID: ALPS08477406
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/March-2024
Restart Required: Yes
Instructions:
1. Contact device manufacturer for firmware updates. 2. Apply firmware patch ALPS08477406. 3. Reboot device after update. 4. Verify patch installation.
🔧 Temporary Workarounds
Disable Wi-Fi if not needed
androidTemporarily disable Wi-Fi functionality to prevent exploitation through wlan firmware
adb shell svc wifi disable
Settings > Network & internet > Wi-Fi > Turn off
Restrict local access
allImplement strict access controls to limit local system access to trusted users only
🧯 If You Can't Patch
- Segment affected devices on isolated network segments
- Implement strict application whitelisting and endpoint protection
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions. Contact device vendor for specific vulnerability testing.Check Version:
Manufacturer-specific commands vary by device. Typically: adb shell getprop ro.build.fingerprint or device settings > About phone > Build numberVerify Fix Applied:
Verify firmware version includes Patch ID ALPS08477406. Check with manufacturer for specific verification procedures.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- Suspicious wlan firmware access attempts
- Kernel panic or system crashes
Network Indicators:
- Unusual local network traffic patterns from affected devices
SIEM Query:
EventID=4688 AND ProcessName LIKE '%wlan%' AND IntegrityLevel='System'