CVE-2020-11168
📋 TL;DR
This CVE describes a null-pointer dereference vulnerability in Qualcomm Snapdragon chipsets that allows attackers to access memory beyond allocated buffer boundaries. When exploited, it can lead to denial of service, information disclosure, or remote code execution. Affected devices include smartphones, automotive systems, IoT devices, wearables, and computing platforms using the listed Snapdragon processors.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wearables
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges leading to complete device compromise, data theft, and persistent backdoor installation.
Likely Case
Denial of service (device crash/reboot) or information disclosure from kernel memory.
If Mitigated
Limited impact with proper memory protection mechanisms and exploit mitigations in place.
🎯 Exploit Status
Null-pointer dereference vulnerabilities typically require specific memory manipulation techniques. The high CVSS score suggests remote exploitation is possible without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Vendor-specific firmware updates
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/november-2020-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. 4. Verify patch application through version checks.
🔧 Temporary Workarounds
Network segmentation
allIsolate affected devices from untrusted networks and internet exposure.
Memory protection enforcement
linuxEnable kernel memory protection features like KASLR, stack canaries if available.
echo 2 > /proc/sys/kernel/randomize_va_space
echo 1 > /proc/sys/kernel/kptr_restrict
🧯 If You Can't Patch
- Implement strict network access controls and firewall rules
- Monitor for abnormal device behavior and crash reports
🔍 How to Verify
Check if Vulnerable:
Check device chipset model and firmware version against Qualcomm advisory. Use: cat /proc/cpuinfo | grep -i qualcommCheck Version:
getprop ro.build.fingerprint (Android) or uname -a (Linux)Verify Fix Applied:
Verify firmware version has been updated to post-November 2020 release. Check with device manufacturer for specific patch verification.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Null pointer dereference errors in dmesg
- Unexpected device reboots
Network Indicators:
- Unusual network traffic to/from affected devices
- Port scanning targeting vulnerable services
SIEM Query:
source="kernel" AND "null pointer" OR "dereference" OR source="android" AND event="crash" AND component="kernel"