CVE-2025-25944
📋 TL;DR
A buffer overflow vulnerability in Bento4 v1.6.0-641 allows local attackers to execute arbitrary code by crafting a malicious MP4 file and processing it with mp4fragment. This affects systems running vulnerable Bento4 versions where users process untrusted MP4 files.
💻 Affected Systems
- Bento4
📦 What is this software?
Bento4 by Axiosys
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to full system compromise with attacker-controlled code execution.
Likely Case
Local user gains elevated privileges or executes arbitrary code in the context of the mp4fragment process.
If Mitigated
Limited impact if proper sandboxing and least privilege principles are applied to media processing tools.
🎯 Exploit Status
Requires local access and ability to supply crafted MP4 file to mp4fragment. Buffer overflow in AP4_RtpAtom constructor.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in Bento4 v1.6.0-642 or later
Vendor Advisory: https://github.com/axiomatic-systems/Bento4/issues/993
Restart Required: No
Instructions:
1. Visit GitHub repository. 2. Update to latest Bento4 version. 3. Recompile/reinstall if using source. 4. Replace existing mp4fragment binary.
🔧 Temporary Workarounds
Restrict mp4fragment usage
allLimit execution of mp4fragment to trusted users and environments only
chmod 750 /path/to/mp4fragment
setfacl -m u:trusteduser:rx /path/to/mp4fragment
🧯 If You Can't Patch
- Run mp4fragment in sandboxed/containerized environment with minimal privileges
- Implement strict input validation for MP4 files before processing
🔍 How to Verify
Check if Vulnerable:
Check Bento4 version: mp4fragment --version | grep '1.6.0-641'Check Version:
mp4fragment --versionVerify Fix Applied:
Verify version is 1.6.0-642 or later: mp4fragment --version📡 Detection & Monitoring
Log Indicators:
- Segmentation faults or abnormal termination of mp4fragment process
- Unusual process execution patterns for mp4fragment
Network Indicators:
- None - local exploitation only
SIEM Query:
Process:name='mp4fragment' AND (EventID=1000 OR TerminationReason='segmentation fault')