CVE-2021-30319
📋 TL;DR
This vulnerability allows integer overflow in Qualcomm Snapdragon chipsets when processing WMI commands due to improper validation of command length parameters. Attackers could potentially execute arbitrary code or cause denial of service on affected devices. It impacts a wide range of Snapdragon-based products including mobile devices, automotive systems, IoT devices, and compute platforms.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer Electronics Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Voice & Music
📦 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 from user to kernel space, allowing attackers to bypass security controls and gain elevated access.
If Mitigated
Denial of service through system crash or instability if exploitation attempts are blocked or fail.
🎯 Exploit Status
Requires local access or ability to execute code on the device; WMI interface access needed for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware updates released in January 2022 security bulletin
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/january-2022-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches through OEM firmware updates. 3. Reboot device after update installation. 4. Verify patch application through version checks.
🔧 Temporary Workarounds
Restrict WMI interface access
linuxLimit access to WMI interfaces through SELinux policies or access controls
🧯 If You Can't Patch
- Implement strict application sandboxing to limit potential privilege escalation
- Monitor for unusual WMI command activity and system crashes
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's security bulletin; examine /proc/version or system properties for chipset and firmware detailsCheck Version:
cat /proc/version or getprop ro.build.fingerprint on Android devicesVerify Fix Applied:
Verify firmware version has been updated to post-January 2022 release; check for absence of vulnerability in security scan results📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- WMI command processing errors
- Integer overflow warnings in kernel logs
Network Indicators:
- Unusual local inter-process communication patterns
SIEM Query:
source="kernel" AND ("integer overflow" OR "WMI" OR "Snapdragon")