CVE-2017-13308
📋 TL;DR
CVE-2017-13308 is a buffer overflow vulnerability in MediaTek thermal sensor drivers that allows local privilege escalation. Attackers can exploit improper input validation in tscpu_write_GPIO_out and mtkts_Abts_write functions to execute arbitrary code with system privileges. This affects Android devices using MediaTek chipsets.
💻 Affected Systems
- Android devices with MediaTek chipsets
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to gain root/system privileges, install persistent malware, access all user data, and bypass security controls.
Likely Case
Local privilege escalation allowing malware or malicious apps to elevate privileges and perform unauthorized actions on the device.
If Mitigated
Limited impact if proper kernel hardening, SELinux policies, and privilege separation are implemented to contain the damage.
🎯 Exploit Status
Exploitation requires local access and system execution privileges. The vulnerability is in kernel-space code, making exploitation more complex than user-space vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level June 2018 or later
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2018-06-01
Restart Required: Yes
Instructions:
1. Apply Android security patch from June 2018 or later. 2. Update device firmware through official channels. 3. Reboot device after update. 4. Verify patch installation through security patch level.
🔧 Temporary Workarounds
Restrict system privileges
androidLimit which applications and users have system execution privileges to reduce attack surface
Disable unnecessary kernel modules
androidDisable MediaTek thermal sensor modules if not required for device functionality
🧯 If You Can't Patch
- Implement strict application sandboxing and privilege separation
- Deploy runtime application self-protection (RASP) and behavioral monitoring
🔍 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 2018 or later. Check kernel version and ensure updated MediaTek drivers are present.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Abnormal thermal sensor access patterns
- Privilege escalation attempts in system logs
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
source="android_kernel" AND (event="buffer_overflow" OR event="privilege_escalation") AND module="mtk_ts_Abts"