CVE-2018-9394
📋 TL;DR
This vulnerability allows local attackers to write out-of-bounds memory in the MediaTek Wi-Fi driver, potentially leading to privilege escalation. It affects Android devices with specific MediaTek chipsets. Exploitation requires system execution privileges but no user interaction.
💻 Affected Systems
- Android devices with MediaTek Wi-Fi chipsets
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains root privileges on the device, enabling complete system compromise and data exfiltration.
Likely Case
Malicious app with system privileges exploits the vulnerability to gain root access and install persistent malware.
If Mitigated
With proper app sandboxing and SELinux policies, impact is limited to the compromised app's context.
🎯 Exploit Status
Requires system execution privileges and knowledge of driver internals for reliable exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android June 2018 security patch level (2018-06-01)
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2018-06-01
Restart Required: Yes
Instructions:
1. Apply Android June 2018 security patch. 2. Update device firmware through manufacturer channels. 3. Reboot device after update.
🔧 Temporary Workarounds
Disable Wi-Fi Direct
androidDisable Wi-Fi Direct/P2P functionality to prevent vulnerable code path execution
adb shell settings put global wifi_p2p_device_name ""
adb shell svc wifi disable
🧯 If You Can't Patch
- Restrict installation of untrusted applications
- Implement strict SELinux policies to limit system privilege escalation
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level: Settings > About phone > Android security patch level. If before June 2018, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level shows 'June 1, 2018' or later.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Wi-Fi driver crash reports
- SELinux denials related to mtk_p2p
Network Indicators:
- Unusual Wi-Fi Direct connection attempts
SIEM Query:
source="android_kernel" AND "mtk_p2p" AND ("panic" OR "oops" OR "segfault")