CVE-2021-30278
📋 TL;DR
This vulnerability in Qualcomm's TrustZone memory transfer interface allows improper input validation that could lead to information disclosure. It affects multiple Snapdragon platforms including Auto, Compute, Connectivity, Consumer IoT, Industrial IoT, Voice & Music, and Wired Infrastructure and Networking. Attackers could potentially access sensitive data from protected memory regions.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Voice & Music
- Snapdragon Wired Infrastructure and Networking
📦 What is this software?
Sd7c Firmware by Qualcomm
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of TrustZone secure environment, allowing extraction of cryptographic keys, biometric data, DRM content, and other sensitive information stored in secure memory.
Likely Case
Limited information disclosure from TrustZone memory, potentially exposing some protected data but not full system compromise.
If Mitigated
No impact if patched; with proper security controls, exploitation would be prevented or detected.
🎯 Exploit Status
Exploitation requires local access and knowledge of TrustZone internals; no public exploits known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Varies by device manufacturer - check with OEM for specific patch versions
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/december-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for available security updates. 2. Apply the latest firmware/security patch from OEM. 3. Reboot device after update. 4. Verify patch installation.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and logical access to vulnerable devices
Application sandboxing
allImplement strict application isolation and privilege separation
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks and users
- Implement strict access controls and monitoring for suspicious TrustZone access attempts
🔍 How to Verify
Check if Vulnerable:
Check device chipset version and compare against Qualcomm's affected list; check Android security patch level (should be December 2021 or later)Check Version:
On Android: Settings > About phone > Android security patch levelVerify Fix Applied:
Verify Android security patch level is December 2021 or later; check with device manufacturer for specific patch verification📡 Detection & Monitoring
Log Indicators:
- Unusual TrustZone API calls
- Memory access violations in secure environment
- Failed TrustZone operations
Network Indicators:
- Not network exploitable - local vulnerability
SIEM Query:
Not applicable - local hardware vulnerability