CVE-2025-25469
📋 TL;DR
A memory leak vulnerability exists in FFmpeg's IAMF (Immersive Audio Model and Format) component that could allow attackers to cause denial of service through resource exhaustion. This affects systems using FFmpeg git-master versions before commit d5873b to process IAMF audio files. The vulnerability is particularly relevant for media processing servers and applications that handle untrusted audio content.
💻 Affected Systems
- FFmpeg
📦 What is this software?
Ffmpeg by Ffmpeg
⚠️ Risk & Real-World Impact
Worst Case
Sustained exploitation could lead to complete system memory exhaustion, causing FFmpeg processes to crash and potentially affecting system stability for other applications.
Likely Case
Processing malicious IAMF files would cause gradual memory consumption, leading to FFmpeg process crashes and denial of service for media processing operations.
If Mitigated
With proper memory limits and process isolation, impact would be limited to individual FFmpeg processes without affecting system stability.
🎯 Exploit Status
Exploitation requires feeding malicious IAMF files to vulnerable FFmpeg instances. No authentication needed if FFmpeg processes external input.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: git-master commit d5873be583ada9e1fb887e2fe8dcfd4b12e0efcd and later
Vendor Advisory: https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/d5873be583ada9e1fb887e2fe8dcfd4b12e0efcd
Restart Required: Yes
Instructions:
1. Update FFmpeg to latest git-master version
2. Rebuild from source including commit d5873b
3. Restart any services using FFmpeg
4. Verify the fix with test IAMF files
🔧 Temporary Workarounds
Disable IAMF support
allCompile FFmpeg without IAMF support to eliminate the vulnerable component
./configure --disable-iamf
Memory limit enforcement
linuxUse system controls to limit memory consumption of FFmpeg processes
ulimit -v 1048576
systemd-run --scope -p MemoryLimit=1G ffmpeg
🧯 If You Can't Patch
- Implement strict input validation to reject untrusted IAMF files
- Run FFmpeg in containerized environments with memory limits
🔍 How to Verify
Check if Vulnerable:
Check FFmpeg version: ffmpeg -version | grep 'git-master' and verify commit hash is before d5873bCheck Version:
ffmpeg -version | grep 'git-master'Verify Fix Applied:
Test with known IAMF files while monitoring memory usage with tools like top or htop📡 Detection & Monitoring
Log Indicators:
- FFmpeg process crashes with memory allocation errors
- Abnormal memory consumption patterns in system logs
Network Indicators:
- Multiple IAMF file uploads to media processing endpoints
SIEM Query:
process.name:"ffmpeg" AND (event.action:"process_crash" OR memory.usage > 90%)