CVE-2025-0518
📋 TL;DR
This CVE describes an unchecked return value and out-of-bounds read vulnerability in FFmpeg's pan audio filter that could allow reading sensitive constants from executable memory. The vulnerability affects FFmpeg version 7.1 and could potentially leak information about the application's memory layout or internal state.
💻 Affected Systems
- FFmpeg
📦 What is this software?
Ffmpeg by Ffmpeg
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure of sensitive memory contents, potentially revealing cryptographic keys, memory addresses, or other sensitive data that could facilitate further exploitation.
Likely Case
Application crash or denial of service due to invalid memory access, with possible limited information leakage about memory layout.
If Mitigated
No impact if proper input validation and bounds checking are implemented, or if the vulnerable component is not used.
🎯 Exploit Status
Exploitation requires crafting specific audio input to trigger the out-of-bounds read condition.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after commit b5b6391d64807578ab872dc58fb8aa621dcfc38a
Vendor Advisory: https://lists.debian.org/debian-lts-announce/2025/02/msg00037.html
Restart Required: Yes
Instructions:
1. Update FFmpeg to version containing commit b5b6391d64807578ab872dc58fb8aa621dcfc38a
2. Rebuild from source with the patched libavfilter/af_pan.c
3. Restart any services using FFmpeg
🔧 Temporary Workarounds
Disable pan audio filter
allPrevent use of the vulnerable audio filter component
Configure applications to avoid using the 'pan' audio filter
🧯 If You Can't Patch
- Implement strict input validation for audio files processed by FFmpeg
- Isolate FFmpeg processing in sandboxed containers with limited memory access
🔍 How to Verify
Check if Vulnerable:
Check FFmpeg version: ffmpeg -version | grep 'version' and verify if it's 7.1Check Version:
ffmpeg -versionVerify Fix Applied:
Verify commit b5b6391d64807578ab872dc58fb8aa621dcfc38a is present in the build📡 Detection & Monitoring
Log Indicators:
- Segmentation faults in FFmpeg processes
- Memory access violation errors
Network Indicators:
- Unusual media file uploads with crafted audio streams
SIEM Query:
Process:ffmpeg AND (EventID:1000 OR Signal:SIGSEGV)