CVE-2015-9183
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code in the Qualcomm Trusted Execution Environment (TEE) on affected Android devices. An integer overflow in the TQS QSEE application's certificate parsing leads to buffer overflow, potentially compromising the secure execution environment. Devices with Qualcomm Snapdragon 410/12, 617, 650/52, 800, 808, or 810 chips running Android before April 2018 security patches are affected.
💻 Affected Systems
- Android devices with Qualcomm Snapdragon chips
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the Trusted Execution Environment, allowing attackers to bypass hardware security features, extract encryption keys, and gain persistent root access to the device.
Likely Case
Privilege escalation from userland to kernel or TEE, enabling data theft, surveillance capabilities, or installation of persistent malware.
If Mitigated
Limited impact if device is fully patched and has additional security controls like verified boot and SELinux enforcement.
🎯 Exploit Status
Exploitation requires local access or ability to execute code on the device. The vulnerability is in the trusted execution environment, making exploitation complex but highly impactful.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level 2018-04-05 or later
Vendor Advisory: https://source.android.com/security/bulletin/2018-04-01
Restart Required: Yes
Instructions:
1. Check current Android security patch level in Settings > About phone > Android security patch level. 2. If before April 2018, update device through Settings > System > System update. 3. If no update available, contact device manufacturer for patch availability. 4. Reboot device after update.
🔧 Temporary Workarounds
Disable unnecessary TEE services
androidReduce attack surface by disabling unused trusted applications if device management tools allow it
🧯 If You Can't Patch
- Isolate affected devices on separate network segments with strict access controls
- Implement mobile device management with strict application whitelisting and monitoring
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android security patch level. If date is before 2018-04-05, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows 2018-04-05 or later date. Check Qualcomm chip model matches affected list.📡 Detection & Monitoring
Log Indicators:
- Unusual TEE/QSEE service crashes
- Unexpected privilege escalation attempts
- Abnormal certificate parsing operations
Network Indicators:
- Unusual outbound connections from mobile devices
- Suspicious certificate-related network traffic
SIEM Query:
source="android_logs" AND (event="tee_crash" OR event="qsee_error" OR message="*certificate*overflow*")