CVE-2020-11178
📋 TL;DR
This vulnerability allows trusted applications in Qualcomm's TrustZone to overwrite protected memory regions of other applications. It affects multiple Qualcomm Snapdragon platforms across automotive, mobile, IoT, and networking devices due to insufficient memory boundary checks.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- 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 security, allowing attackers to execute arbitrary code with highest privileges, bypass hardware security features, and potentially gain persistent access to secure data.
Likely Case
Privilege escalation within TrustZone environment, allowing unauthorized access to sensitive data and functions normally protected by hardware security.
If Mitigated
Limited impact if proper memory isolation and access controls are implemented at hardware/firmware level.
🎯 Exploit Status
Exploitation requires local access and ability to execute code in TrustZone context. No public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Varies by device and OEM implementation
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/january-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware updates 2. Apply Qualcomm-provided patches 3. Update device firmware through OEM channels 4. Verify patch installation
🔧 Temporary Workarounds
Restrict TrustZone Access
allLimit which applications can access TrustZone APIs and functions
Enhanced Memory Monitoring
allImplement additional memory boundary checks in TrustZone applications
🧯 If You Can't Patch
- Isolate affected devices from critical networks
- Implement strict application whitelisting for TrustZone access
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's security bulletins. Use Qualcomm's security tools if available.Check Version:
Device-specific commands vary by OEM. Typically: 'getprop ro.build.version.security_patch' or check firmware version in device settings.Verify Fix Applied:
Verify firmware version has been updated to patched version from OEM. Check Qualcomm security bulletin for specific version information.📡 Detection & Monitoring
Log Indicators:
- Unusual TrustZone access patterns
- Memory access violations in secure kernel logs
- Unexpected application behavior in secure environment
Network Indicators:
- Not network exploitable - local vulnerability
SIEM Query:
Search for TrustZone access violations or secure kernel exceptions in device logs