CVE-2019-10615
📋 TL;DR
This vulnerability is an integer overflow in Qualcomm's Keymaster 4 cryptographic module that occurs when processing large certificate values, potentially leading to memory corruption. It affects numerous Snapdragon processors across automotive, mobile, IoT, and networking products. Attackers could exploit this to execute arbitrary code or cause denial of service.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wearables
- Snapdragon Wired Infrastructure and Networking
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges leading to complete device compromise, data theft, or persistent backdoor installation.
Likely Case
Local privilege escalation allowing attackers to gain elevated permissions on affected devices.
If Mitigated
Denial of service through system crash or reboot if memory corruption occurs but exploitation fails.
🎯 Exploit Status
Exploitation requires local access or malicious application installation. The vulnerability is in cryptographic processing which may require specific conditions to trigger.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: August 2020 security patches and later
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/august-2020-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for available firmware updates. 2. Apply August 2020 or later Qualcomm security patches. 3. Reboot device after patch installation. 4. Verify patch application through version checks.
🔧 Temporary Workarounds
Restrict local code execution
allLimit installation of untrusted applications and enforce application sandboxing
Disable unnecessary cryptographic services
linuxIf Keymaster services are not required, disable them to reduce attack surface
🧯 If You Can't Patch
- Implement strict application whitelisting to prevent malicious apps from exploiting the vulnerability
- Deploy network segmentation to isolate affected devices from critical systems
🔍 How to Verify
Check if Vulnerable:
Check device firmware version and compare against August 2020 patch level. Vulnerable if using affected Qualcomm chipsets with pre-August 2020 firmware.Check Version:
On Android: 'getprop ro.build.version.security_patch' or 'cat /proc/version'Verify Fix Applied:
Verify firmware version includes August 2020 or later security patches from Qualcomm. Check with device manufacturer for specific patch verification.📡 Detection & Monitoring
Log Indicators:
- Keymaster service crashes
- Unexpected memory allocation failures
- Cryptographic operation failures
Network Indicators:
- Unusual cryptographic handshake patterns
- Unexpected certificate processing requests
SIEM Query:
source="android_logs" AND ("keymaster" OR "crypto") AND ("crash" OR "overflow" OR "memory")