CVE-2024-36619
📋 TL;DR
CVE-2024-36619 is an integer overflow vulnerability in FFmpeg's WAVARC decoder that can cause a denial-of-service condition when processing specially crafted WAVARC audio files. This affects any system or application using FFmpeg's libavcodec library to decode WAVARC files. The vulnerability is present in FFmpeg version 6.1.1 and potentially earlier versions.
💻 Affected Systems
- FFmpeg
- Applications using FFmpeg libavcodec library
📦 What is this software?
Ffmpeg by Ffmpeg
⚠️ Risk & Real-World Impact
Worst Case
Complete application or service crash leading to sustained denial-of-service, potentially affecting availability of media processing services.
Likely Case
Application crash or hang when processing malicious WAVARC files, requiring restart of affected services.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially causing only isolated process crashes.
🎯 Exploit Status
Exploitation requires crafting a malicious WAVARC file and getting it processed by vulnerable FFmpeg. No authentication needed if file processing is accessible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit 28c7094b25b689185155a6833caf2747b94774a4 and later versions
Vendor Advisory: https://github.com/ffmpeg/ffmpeg/commit/28c7094b25b689185155a6833caf2747b94774a4
Restart Required: Yes
Instructions:
1. Update FFmpeg to version containing commit 28c7094b25b689185155a6833caf2747b94774a4 or later. 2. Rebuild any applications using FFmpeg libraries. 3. Restart affected services using FFmpeg.
🔧 Temporary Workarounds
Disable WAVARC decoder
allDisable the vulnerable WAVARC decoder in FFmpeg configuration
Recompile FFmpeg with --disable-decoder=wavarc configure option
Input filtering
allBlock or filter WAVARC files from being processed
Implement file type validation to reject .wavarc or WAVARC-encoded files
🧯 If You Can't Patch
- Implement strict input validation to reject suspicious or malformed audio files
- Run FFmpeg in sandboxed/containerized environments with resource limits to contain crashes
🔍 How to Verify
Check if Vulnerable:
Check FFmpeg version and if it contains the vulnerable code from line 651 in wavarc.cCheck Version:
ffmpeg -version | grep 'version'Verify Fix Applied:
Verify FFmpeg version includes commit 28c7094b25b689185155a6833caf2747b94774a4 or test with known malicious WAVARC files📡 Detection & Monitoring
Log Indicators:
- FFmpeg process crashes
- Segmentation fault errors
- Abnormal termination of media processing services
Network Indicators:
- Multiple failed media processing requests
- Unusual WAVARC file uploads
SIEM Query:
process.name:"ffmpeg" AND (event.action:"crashed" OR log.level:"error")