CVE-2020-11303
📋 TL;DR
This vulnerability in Qualcomm Snapdragon chipsets allows information disclosure when devices accept AMSDU frames with mismatched destination and source addresses. Attackers can potentially intercept or manipulate network traffic on affected devices. This impacts numerous Snapdragon product lines including mobile, automotive, IoT, and networking devices.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Connectivity
- Snapdragon Consumer Electronics Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon IoT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wired Infrastructure and Networking
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full network traffic interception, credential theft, and man-in-the-middle attacks on affected devices, potentially compromising sensitive data and device integrity.
Likely Case
Information disclosure allowing attackers to monitor network traffic, potentially capturing sensitive data transmitted over wireless networks.
If Mitigated
Limited impact with proper network segmentation, encryption, and updated firmware preventing exploitation.
🎯 Exploit Status
Exploitation requires wireless network access and ability to craft malicious AMSDU frames; no public exploit code known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Qualcomm October 2021 security bulletin for specific patched versions
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/october-2021-bulletin
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches through OEM updates. 3. Reboot device after update. 4. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate vulnerable devices on separate network segments to limit exposure
Wireless Security Controls
allImplement strong WPA3 encryption and MAC address filtering on wireless networks
🧯 If You Can't Patch
- Segment vulnerable devices on isolated network segments
- Implement network monitoring for suspicious wireless frame patterns
🔍 How to Verify
Check if Vulnerable:
Check device chipset model and firmware version against Qualcomm advisory; devices with affected Snapdragon chipsets are vulnerable.Check Version:
Device-specific commands vary by manufacturer; typically 'adb shell getprop ro.build.fingerprint' for Android or manufacturer-specific firmware check tools.Verify Fix Applied:
Verify firmware version has been updated to post-October 2021 patches from device manufacturer.📡 Detection & Monitoring
Log Indicators:
- Unusual wireless frame patterns
- AMSDU frame anomalies in wireless logs
- Network traffic interception alerts
Network Indicators:
- Suspicious AMSDU frames with mismatched addresses
- Unusual wireless traffic patterns
SIEM Query:
wireless AND (AMSDU OR frame) AND (mismatch OR anomaly)