CVE-2025-25471
📋 TL;DR
This vulnerability is a NULL pointer dereference in FFmpeg's MOV file format parser that can cause a denial of service (crash) when processing specially crafted media files. It affects systems running vulnerable versions of FFmpeg that process MOV/QuickTime files. The impact is limited to application crashes rather than remote code execution.
💻 Affected Systems
- FFmpeg
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Application crash leading to denial of service for media processing services, potentially disrupting workflows that rely on FFmpeg for video processing.
Likely Case
Application crash when processing malicious MOV files, requiring restart of the affected FFmpeg process or service.
If Mitigated
Minimal impact with proper input validation and sandboxing; crashes would be contained to isolated processes.
🎯 Exploit Status
Exploitation requires feeding a specially crafted MOV file to FFmpeg. No authentication is needed if the application processes external files.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: git commit fd1772b7475d0d5673a5dd314ee78443d0be4cf1 and later
Vendor Advisory: https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/fd1772b7475d0d5673a5dd314ee78443d0be4cf1
Restart Required: Yes
Instructions:
1. Update FFmpeg to latest git master or a version containing commit fd1772b7475d0d5673a5dd314ee78443d0be4cf1. 2. Recompile if using source. 3. Restart any services using FFmpeg.
🔧 Temporary Workarounds
Disable MOV format processing
allPrevent FFmpeg from processing MOV/QuickTime files to avoid the vulnerable code path
ffmpeg -formats | grep -v mov
Configure applications to reject MOV files
Sandbox FFmpeg execution
linuxRun FFmpeg in a container or sandbox to limit impact of crashes
docker run --rm -v $(pwd):/data ffmpeg
Use bubblewrap or similar sandboxing tools
🧯 If You Can't Patch
- Implement strict input validation to reject suspicious MOV files before processing
- Monitor FFmpeg processes for crashes and implement automatic restart mechanisms
🔍 How to Verify
Check if Vulnerable:
Check FFmpeg version: ffmpeg -version | grep 'git-' and verify if commit fd1772b7475d0d5673a5dd314ee78443d0be4cf1 is presentCheck Version:
ffmpeg -version | head -1Verify Fix Applied:
After update, verify the commit is included: git log --oneline | grep fd1772b7475d0d5673a5dd314ee78443d0be4cf1📡 Detection & Monitoring
Log Indicators:
- FFmpeg segmentation fault or crash logs
- Application logs showing failed media processing
Network Indicators:
- Unusual volume of MOV file uploads to media processing services
SIEM Query:
process.name:"ffmpeg" AND event.action:"crashed" OR event.outcome:"failure"