CVE-2020-0038
📋 TL;DR
This vulnerability in Android's NFC stack allows attackers to read uninitialized memory data remotely without user interaction. It affects Android devices running versions 8.0 through 10, potentially exposing sensitive information from device memory.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker could read sensitive data from device memory including authentication tokens, encryption keys, or other application data, leading to complete system compromise.
Likely Case
Information disclosure of random memory contents, potentially exposing some application data or system information.
If Mitigated
With proper network segmentation and device hardening, impact is limited to information disclosure within the local network segment.
🎯 Exploit Status
Exploitation requires NFC proximity or malicious NFC tag, but no authentication or user interaction needed once triggered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin March 2020 patches
Vendor Advisory: https://source.android.com/security/bulletin/2020-03-01
Restart Required: Yes
Instructions:
1. Apply March 2020 Android security patch level
2. Update to Android 11 or later
3. For OEM devices, check manufacturer for specific firmware updates
🔧 Temporary Workarounds
Disable NFC
androidTurn off NFC functionality to prevent exploitation via malicious tags
adb shell settings put secure nfc_on 0
Restrict NFC permissions
androidLimit which apps can use NFC to reduce attack surface
Review and restrict NFC permissions in Settings > Apps > App permissions > NFC
🧯 If You Can't Patch
- Physically disable NFC via device settings or MDM policy
- Implement network segmentation to isolate vulnerable devices from critical systems
🔍 How to Verify
Check if Vulnerable:
Check Android version in Settings > About phone > Android version. If version is 8.0-10 and security patch level is before March 2020, device is vulnerable.Check Version:
adb shell getprop ro.build.version.release && adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android version is 11+ OR security patch level is March 2020 or later in Settings > About phone > Android security patch level.📡 Detection & Monitoring
Log Indicators:
- Unusual NFC activity logs
- Multiple failed NFC handshake attempts
- Unexpected memory access patterns in system logs
Network Indicators:
- N/A - This is a local NFC-based vulnerability
SIEM Query:
N/A - Local device vulnerability requiring physical/log proximity