CVE-2025-25947
📋 TL;DR
This vulnerability in Bento4 v1.6.0-641 allows attackers to cause a segmentation fault (crash) by providing a specially crafted MP4 file to the mp4encrypt tool. This affects systems using Bento4 for MP4 encryption operations. The crash could potentially lead to denial of service or be leveraged for further exploitation.
💻 Affected Systems
- Bento4
📦 What is this software?
Bento4 by Axiosys
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution if the segmentation fault can be weaponized into memory corruption leading to arbitrary code execution.
Likely Case
Denial of service through application crash when processing malicious MP4 files.
If Mitigated
Limited to application crash with no data loss if proper input validation and sandboxing are in place.
🎯 Exploit Status
Proof of concept available in GitHub issue #994. Exploitation requires providing malicious MP4 file to mp4encrypt.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check latest Bento4 release after v1.6.0-641
Vendor Advisory: https://github.com/axiomatic-systems/Bento4/issues/994
Restart Required: No
Instructions:
1. Check current Bento4 version. 2. Update to latest version from official repository. 3. Recompile if using source. 4. Replace existing binaries with patched versions.
🔧 Temporary Workarounds
Input validation
allValidate MP4 files before processing with mp4encrypt
Sandbox execution
linuxRun mp4encrypt in isolated container or sandbox
docker run --rm -v $(pwd):/data bento4 mp4encrypt
🧯 If You Can't Patch
- Restrict mp4encrypt usage to trusted files only
- Implement monitoring for segmentation faults in mp4encrypt processes
🔍 How to Verify
Check if Vulnerable:
Check if using Bento4 v1.6.0-641 and test with proof of concept MP4 file from GitHub issueCheck Version:
mp4encrypt --version 2>&1 | grep -i versionVerify Fix Applied:
Test with same malicious MP4 file - should not crash📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in system logs
- mp4encrypt process crashes
Network Indicators:
- Unusual MP4 file uploads to systems using mp4encrypt
SIEM Query:
process_name="mp4encrypt" AND (event_type="crash" OR exit_code="139")