CVE-2020-11263
📋 TL;DR
CVE-2020-11263 is an integer overflow vulnerability in Qualcomm Snapdragon chipsets that occurs when improper checks are performed after memory address and size alignment. This allows attackers to potentially execute arbitrary code or cause denial of service. Affected devices include smartphones, IoT devices, networking equipment, and other products using vulnerable Snapdragon processors.
💻 Affected Systems
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Wired Infrastructure and Networking
📦 What is this software?
Sd7c Firmware by Qualcomm
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation.
Likely Case
Local privilege escalation or denial of service affecting device stability and performance.
If Mitigated
Limited impact with proper memory protection mechanisms and exploit mitigations in place.
🎯 Exploit Status
Exploitation requires local access or ability to execute code on the device. No public exploit code available as of knowledge cutoff.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to device manufacturer updates - Qualcomm provided fixes to OEMs
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/december-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for security updates. 2. Apply latest firmware/OS updates from device vendor. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Restrict local code execution
allLimit installation of untrusted applications and restrict user privileges
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Implement application allowlisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check device chipset model and firmware version against Qualcomm's security bulletin. Use 'cat /proc/cpuinfo' on Linux/Android to identify chipset.Check Version:
On Android: 'getprop ro.build.fingerprint' or check Settings > About Phone > Build NumberVerify Fix Applied:
Verify device has received security updates dated after December 2021 and check with manufacturer for specific patch status.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Memory corruption errors in system logs
- Unexpected process crashes
Network Indicators:
- Unusual outbound connections from system processes
- Anomalous privilege escalation attempts
SIEM Query:
Process: (parent_process_name contains 'kernel' OR parent_process_name contains 'system') AND (process_name contains unusual_executable)