CVE-2020-11161
📋 TL;DR
This vulnerability allows out-of-bounds memory access in Qualcomm Snapdragon chipsets when processing negative width values from external components. It affects multiple Snapdragon product lines including Auto, Compute, Mobile, and IoT variants. Attackers could potentially 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
📦 What is this software?
⚠️ 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 (device crash/reboot) or limited information disclosure
If Mitigated
Contained impact with proper memory protections and exploit mitigations
🎯 Exploit Status
Exploitation requires triggering specific memory alignment calculations with negative width values
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Qualcomm January 2021 security bulletin for specific chipset updates
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/january-2021-bulletin
Restart Required: Yes
Instructions:
1. Check Qualcomm security bulletin for affected chipset versions. 2. Obtain firmware updates from device manufacturer. 3. Apply firmware updates following manufacturer instructions. 4. Reboot device to activate patches.
🔧 Temporary Workarounds
Input validation for external components
allImplement strict input validation for width parameters from external sources
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Implement strict app vetting and installation controls
🔍 How to Verify
Check if Vulnerable:
Check device chipset model and firmware version against Qualcomm's security bulletinCheck Version:
Device-specific commands vary by manufacturer (e.g., 'getprop ro.build.fingerprint' on Android)Verify Fix Applied:
Verify firmware version has been updated to patched version from manufacturer📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Memory access violation errors
- Unexpected device reboots
Network Indicators:
- Unusual external component communication patterns
SIEM Query:
Device logs containing 'segmentation fault', 'memory violation', or 'kernel panic' near external component interactions