CVE-2020-22015
📋 TL;DR
This buffer overflow vulnerability in FFmpeg's MOV file handling allows attackers to execute arbitrary code, cause denial of service, or leak sensitive information by crafting malicious video files. It affects FFmpeg 4.2 and systems using this library for video processing. Remote attackers can exploit this by tricking users into processing malicious media files.
💻 Affected Systems
- FFmpeg
📦 What is this software?
Ffmpeg by Ffmpeg
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the FFmpeg process, potentially leading to full system compromise.
Likely Case
Denial of service through application crashes when processing malicious media files.
If Mitigated
Limited impact if FFmpeg runs in sandboxed environments with minimal privileges.
🎯 Exploit Status
The vulnerability is in a widely used library with public details available. Crafting malicious MOV files requires moderate technical skill but is well-documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: FFmpeg 4.2.4 and later
Vendor Advisory: https://trac.ffmpeg.org/ticket/8190
Restart Required: Yes
Instructions:
1. Update FFmpeg to version 4.2.4 or later using your package manager. 2. For Debian/Ubuntu: sudo apt update && sudo apt upgrade ffmpeg. 3. For source installations: download latest source from ffmpeg.org and recompile. 4. Restart all services using FFmpeg.
🔧 Temporary Workarounds
Disable MOV processing
allTemporarily disable MOV file format support in FFmpeg configuration
ffmpeg -formats | grep mov
Reconfigure applications to reject MOV files
Sandbox FFmpeg execution
linuxRun FFmpeg in container or with reduced privileges
docker run --security-opt no-new-privileges ffmpeg
Use seccomp profiles or AppArmor/SELinux
🧯 If You Can't Patch
- Implement strict input validation to reject suspicious MOV files before processing
- Deploy network segmentation to isolate FFmpeg servers from critical systems
🔍 How to Verify
Check if Vulnerable:
Run: ffmpeg -version | grep 'version 4.2' && echo 'Vulnerable if version < 4.2.4'Check Version:
ffmpeg -version | head -1Verify Fix Applied:
Run: ffmpeg -version | grep 'version 4.2.4' && echo 'Patched' || echo 'Check version'📡 Detection & Monitoring
Log Indicators:
- FFmpeg segmentation faults
- Memory access violation errors
- Unexpected process termination
Network Indicators:
- Unusual MOV file uploads to media processing endpoints
- Large media files triggering crashes
SIEM Query:
source="*ffmpeg*" AND ("segmentation fault" OR "SIGSEGV" OR "buffer overflow")