CVE-2020-11125
📋 TL;DR
This vulnerability allows out-of-bounds memory access in Qualcomm Snapdragon MHI command processing due to insufficient validation of channel ID values received from MHI devices. An attacker could potentially execute arbitrary code or cause denial of service. Affected devices include numerous Qualcomm Snapdragon platforms across automotive, mobile, IoT, and networking products.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wearables
- Snapdragon Wired Infrastructure and Networking
📦 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
Denial of service causing device crashes or instability, potentially leading to temporary loss of functionality.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only local denial of service.
🎯 Exploit Status
Exploitation requires sending specially crafted MHI commands to vulnerable devices. No public exploits known as of advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Vendor-specific firmware updates for affected chipsets
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/october-2020-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches for affected chipsets. 3. Reboot device after update. 4. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks to prevent remote exploitation.
Access Control Restrictions
allLimit physical and network access to devices to trusted entities only.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices.
- Monitor for abnormal device behavior or crashes indicating potential exploitation.
🔍 How to Verify
Check if Vulnerable:
Check device chipset model and firmware version against Qualcomm's advisory. Use 'cat /proc/cpuinfo' on Linux devices to identify chipset.Check Version:
Device-specific commands vary by manufacturer. Common: 'getprop ro.build.fingerprint' (Android) or check firmware version in device settings.Verify Fix Applied:
Verify firmware version has been updated to patched version from device manufacturer. Check for absence of crashes or instability.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Device crash/reboot events
- Unexpected MHI command processing errors
Network Indicators:
- Unusual MHI protocol traffic to affected devices
- Anomalous network patterns from embedded devices
SIEM Query:
Example: 'device_type:qualcomm AND (event_type:crash OR event_type:kernel_panic)'