CVE-2021-30268
📋 TL;DR
This vulnerability allows heap memory corruption due to insufficient input validation when processing HWTC IQ Capture commands in Qualcomm Snapdragon chipsets. Attackers could potentially execute arbitrary code or cause denial of service on affected devices. It impacts numerous Snapdragon platforms across automotive, mobile, IoT, and wearable devices.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wearables
📦 What is this software?
Sd7c Firmware by Qualcomm
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation.
Likely Case
Denial of service causing device crashes or instability, potentially requiring physical reset.
If Mitigated
Limited impact if proper input validation and memory protections are implemented at higher software layers.
🎯 Exploit Status
Exploitation requires sending specially crafted HWTC IQ Capture commands to vulnerable chipsets.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Varies by chipset and OEM implementation
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/december-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches through OEM update channels. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Disable HWTC IQ Capture functionality
allIf supported, disable the vulnerable HWTC IQ Capture feature to prevent exploitation.
Device-specific; consult manufacturer documentation
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable devices from untrusted networks
- Deploy intrusion detection systems to monitor for anomalous HWTC command patterns
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions listCheck Version:
Device-specific; typically 'getprop ro.build.fingerprint' on Android or manufacturer-specific commandsVerify Fix Applied:
Verify firmware version matches or exceeds patched version from manufacturer📡 Detection & Monitoring
Log Indicators:
- Unexpected device crashes
- Kernel panic logs
- Memory corruption warnings in system logs
Network Indicators:
- Unusual HWTC command patterns to device ports
- Traffic to chipset debugging interfaces
SIEM Query:
Search for: 'kernel panic' OR 'segmentation fault' OR 'memory corruption' in device logs