CVE-2025-20674
📋 TL;DR
This vulnerability in MediaTek WLAN AP drivers allows attackers to inject arbitrary packets without proper permission checks, enabling remote privilege escalation without user interaction. It affects devices using vulnerable MediaTek wireless chipsets, primarily Android smartphones, tablets, IoT devices, and networking equipment.
💻 Affected Systems
- MediaTek WLAN AP driver implementations
📦 What is this software?
Openwrt by Openwrt
Openwrt by Openwrt
Openwrt by Openwrt
Openwrt by Openwrt
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing remote attackers to execute arbitrary code with kernel privileges, potentially taking full control of affected devices.
Likely Case
Remote attackers gaining elevated privileges to intercept network traffic, install malware, or pivot to other network devices.
If Mitigated
Limited impact if devices are behind firewalls with strict network segmentation and packet filtering.
🎯 Exploit Status
No authentication required, no user interaction needed, making exploitation straightforward for attackers with network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: WCNCR00413202
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/June-2025
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply MediaTek patch WCNCR00413202. 3. Update device firmware through manufacturer channels. 4. Reboot device after update.
🔧 Temporary Workarounds
Disable vulnerable Wi-Fi interfaces
linuxTemporarily disable Wi-Fi functionality on affected devices
nmcli radio wifi off
ip link set wlan0 down
Network segmentation
allIsolate devices with vulnerable chipsets from untrusted networks
🧯 If You Can't Patch
- Segment affected devices on isolated VLANs with strict firewall rules
- Implement network monitoring for unusual packet injection patterns
🔍 How to Verify
Check if Vulnerable:
Check device specifications for MediaTek Wi-Fi chipsets and firmware version against patch WCNCR00413202Check Version:
dmesg | grep -i mediatek || lspci | grep -i mediatekVerify Fix Applied:
Verify firmware version includes patch WCNCR00413202 and test Wi-Fi functionality📡 Detection & Monitoring
Log Indicators:
- Kernel logs showing unexpected packet injection
- Wi-Fi driver crash logs
- Unauthorized privilege escalation attempts
Network Indicators:
- Unusual packet patterns on Wi-Fi interfaces
- Suspicious traffic from wireless clients
SIEM Query:
source="kernel" AND "mediatek" AND ("injection" OR "privilege")