CVE-2017-18314
📋 TL;DR
This vulnerability affects Qualcomm Snapdragon chipsets where a TrustZone (TZ) cold boot clears a CNOC_QDSS RG0 register that was locked by xBL_SEC, potentially allowing privilege escalation. It impacts numerous Snapdragon-based devices including smartphones, wearables, and automotive systems. Attackers could exploit this to bypass security boundaries and gain elevated privileges.
💻 Affected Systems
- Snapdragon MDM9206
- MDM9607
- MDM9635M
- MDM9640
- MDM9645
- MDM9650
- MDM9655
- MSM8909W
- MSM8996AU
- SD 210/SD 212/SD 205
- SD 410/12
- SD 425
- SD 427
- SD 430
- SD 435
- SD 450
- SD 615/16/SD 415
- SD 617
- SD 625
- SD 650/52
- SD 810
- SD 820
- SD 820A
- SD 835
- SDA660
- SDM429
- SDM439
- SDM630
- SDM632
- SDM636
- SDM660
- Snapdragon_High_Med_2016
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to execute arbitrary code with highest privileges, potentially gaining persistent access to sensitive data and hardware functions.
Likely Case
Privilege escalation allowing attackers to bypass security restrictions and access protected system resources or user data.
If Mitigated
Limited impact if device is properly patched and security features like verified boot are enabled and functioning correctly.
🎯 Exploit Status
Exploitation requires physical access or ability to trigger cold boot, making remote exploitation unlikely without additional vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin September 2018 and later
Vendor Advisory: https://source.android.com/security/bulletin/2018-09-01
Restart Required: Yes
Instructions:
1. Check for Android security updates from device manufacturer. 2. Apply September 2018 or later security patch level. 3. Verify patch installation through device settings.
🔧 Temporary Workarounds
Physical Security Controls
allImplement strict physical access controls to prevent attackers from gaining physical access to devices.
Device Encryption
androidEnable full device encryption to protect data even if device is compromised.
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data
- Implement strict physical security controls and monitoring
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android security patch level. If before September 2018, device is likely vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level is September 2018 or later in device settings.📡 Detection & Monitoring
Log Indicators:
- Unexpected cold boot events
- TrustZone initialization failures
- Security boundary violation alerts
Network Indicators:
- Unusual device behavior patterns
- Anomalous privilege escalation attempts
SIEM Query:
Search for security patch level older than 2018-09-01 on Android devices