CVE-2021-30311
📋 TL;DR
This vulnerability allows heap overflow attacks due to improper index validation in Qualcomm Snapdragon chipsets before allocating and writing to heap buffers. Attackers could potentially execute arbitrary code or cause denial of service. Affected devices include those using Snapdragon Auto, Compute, Connectivity, Industrial IoT, and Mobile platforms.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Industrial IOT
- Snapdragon Mobile
📦 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 from memory corruption.
If Mitigated
No impact if patched or if exploit attempts are blocked by security controls.
🎯 Exploit Status
Exploitation likely requires local access or malicious application installation. No public exploits known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: January 2022 security update or later
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/january-2022-bulletin
Restart Required: Yes
Instructions:
1. Check device manufacturer for available updates. 2. Apply January 2022 or later security patch. 3. Reboot device after update.
🔧 Temporary Workarounds
Application Whitelisting
allRestrict installation of untrusted applications to reduce attack surface.
Network Segmentation
allIsolate affected devices from critical networks to limit lateral movement.
🧯 If You Can't Patch
- Isolate affected devices in separate network segments
- Implement strict application control policies
🔍 How to Verify
Check if Vulnerable:
Check device security patch level - if before January 2022, likely vulnerable. Use 'getprop ro.build.version.security_patch' on Android.Check Version:
Android: getprop ro.build.version.security_patchVerify Fix Applied:
Confirm security patch level is January 2022 or later. Check with device manufacturer for specific firmware versions.📡 Detection & Monitoring
Log Indicators:
- Unexpected device crashes/reboots
- Memory corruption errors in system logs
Network Indicators:
- Unusual outbound connections from affected devices
SIEM Query:
Device logs showing repeated crashes or memory errors from Snapdragon-based devices