CVE-2025-7700
📋 TL;DR
This vulnerability in FFmpeg's ALS audio decoder allows attackers to cause denial of service by crashing applications that process specially crafted audio files. It affects any system using vulnerable FFmpeg versions to decode ALS audio. While it doesn't enable data theft or system takeover, it can disrupt services that rely on FFmpeg for audio processing.
💻 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
Complete service disruption through application crashes, potentially affecting availability of media processing services or applications that rely on FFmpeg.
Likely Case
Application crashes when processing malicious audio files, leading to temporary service disruption until the application restarts.
If Mitigated
Minimal impact with proper input validation and memory management controls in place.
🎯 Exploit Status
Exploitation requires feeding a specially crafted ALS audio file to vulnerable FFmpeg instances. No authentication required if the application processes external audio files.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check FFmpeg releases after vulnerability disclosure (specific version TBD)
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2025-7700
Restart Required: Yes
Instructions:
1. Check current FFmpeg version. 2. Update FFmpeg to patched version from official repository. 3. Restart any services using FFmpeg. 4. Verify the update was successful.
🔧 Temporary Workarounds
Disable ALS audio processing
allConfigure applications to reject or skip ALS audio format files if not required
Application-specific configuration required
Input validation
allImplement file type validation and size limits for audio file uploads/processing
🧯 If You Can't Patch
- Implement strict input validation for audio files
- Monitor application logs for crash events and implement automatic restart mechanisms
🔍 How to Verify
Check if Vulnerable:
Check FFmpeg version and compare against patched versions in vendor advisoriesCheck Version:
ffmpeg -versionVerify Fix Applied:
Verify FFmpeg version is updated to patched version and test with known safe ALS audio files📡 Detection & Monitoring
Log Indicators:
- FFmpeg process crashes
- Segmentation faults in FFmpeg logs
- Unexpected termination of media processing services
Network Indicators:
- Unusual patterns of audio file uploads to media processing endpoints
SIEM Query:
source="application.logs" AND (process="ffmpeg" OR process="ffprobe") AND (event="crash" OR event="segfault" OR event="terminated")