CVE-2020-0451
📋 TL;DR
This CVE describes a heap buffer overflow vulnerability in Android's SBR decoder that could allow remote code execution. Attackers could exploit this by tricking users into processing malicious audio content, potentially gaining full control of affected devices. All Android devices running versions 8.0 through 11 are vulnerable.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains full control of device, installs persistent malware, steals sensitive data, and uses device as pivot point for further attacks.
Likely Case
Malicious app or website triggers exploit to install spyware, ransomware, or banking trojans on user's device.
If Mitigated
Exploit fails due to ASLR/security mitigations, causing app crash but no code execution.
🎯 Exploit Status
Exploitation requires user interaction (playing malicious audio). No public exploit code available as of knowledge cutoff.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin November 2020 patches
Vendor Advisory: https://source.android.com/security/bulletin/2020-11-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > Advanced > System update. 2. Install November 2020 security patch or later. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable automatic media processing
androidPrevent automatic processing of audio files in untrusted apps
Use alternative media players
androidUse third-party media players that don't use vulnerable Android SBR decoder
🧯 If You Can't Patch
- Isolate vulnerable devices from critical networks and data
- Implement application allowlisting to prevent untrusted apps from processing media files
🔍 How to Verify
Check if Vulnerable:
Check Android version in Settings > About phone > Android version. If version is 8.0-11 without November 2020 security patch, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android Security Patch Level is November 2020 or later in Settings > About phone > Android security patch level.📡 Detection & Monitoring
Log Indicators:
- Media server crashes
- Audio decoder process termination
- SIGSEGV in sbrdecoder processes
Network Indicators:
- Unusual audio file downloads from untrusted sources
- Suspicious media streaming to devices
SIEM Query:
process_name:sbrdecoder AND (event_type:crash OR exit_code:139)