CVE-2019-2300
📋 TL;DR
This CVE describes a buffer overflow vulnerability in the WLAN handler of Qualcomm Snapdragon chipsets. Attackers can exploit this by sending specially crafted packets to trigger memory corruption, potentially leading to remote code execution. Affected devices include smartphones, IoT devices, networking equipment, and automotive systems using the listed Snapdragon processors.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer Electronics Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wired Infrastructure and Networking
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges, allowing complete device compromise, data theft, and persistent backdoor installation.
Likely Case
Device crash/reboot (denial of service) or limited code execution in WLAN subsystem context.
If Mitigated
Denial of service only if exploit attempts are blocked by network controls or patched firmware.
🎯 Exploit Status
Exploitation requires sending crafted WLAN packets; no authentication needed if within WLAN range. No public exploit code known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Vendor-specific firmware updates (check OEM advisories)
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/march-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.
🔧 Temporary Workarounds
Disable WLAN
allTurn off wireless networking to prevent exploitation
adb shell svc wifi disable
nmcli radio wifi off
systemctl stop wpa_supplicant
Network segmentation
allIsolate affected devices on separate VLANs with strict firewall rules
🧯 If You Can't Patch
- Segment affected devices on isolated networks with strict firewall rules blocking unnecessary WLAN traffic
- Implement network monitoring for anomalous WLAN packets and disable WLAN if not essential
🔍 How to Verify
Check if Vulnerable:
Check device chipset model and firmware version against Qualcomm advisory; devices with listed chipsets are vulnerable unless patched.Check Version:
adb shell getprop ro.bootloader (Android) or cat /proc/cpuinfo (Linux)Verify Fix Applied:
Confirm firmware version has been updated post-March 2020 and check with manufacturer for patch confirmation.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- WLAN driver crash messages
- System reboots without apparent cause
Network Indicators:
- Unusual WLAN packet patterns
- Malformed 802.11 frames
- Excessive retransmissions
SIEM Query:
source="wlan*" AND (event="crash" OR event="panic" OR event="buffer_overflow")