CVE-2025-70309
📋 TL;DR
A stack overflow vulnerability in GPAC's pcmreframe_flush_packet function allows attackers to cause denial of service by processing a specially crafted WAV file. This affects systems running GPAC v2.4.0 that process multimedia files, potentially impacting media servers, streaming applications, and file processing utilities.
💻 Affected Systems
- GPAC (Multimedia Framework)
📦 What is this software?
Gpac by Gpac
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption through application crash, potentially affecting availability of media processing services and causing data loss in active processing sessions.
Likely Case
Application crash leading to denial of service for the affected GPAC process, requiring manual restart and potentially disrupting media processing workflows.
If Mitigated
Isolated process crash contained within application boundaries without system-wide impact, with automated restart mechanisms restoring service.
🎯 Exploit Status
Proof of concept is publicly available, making exploitation straightforward for attackers who can supply malicious WAV files to vulnerable systems.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not yet released
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Monitor GPAC project releases for security updates. 2. When patch is available, update to the fixed version. 3. Restart all services using GPAC.
🔧 Temporary Workarounds
Input Validation for WAV Files
allImplement strict validation of WAV files before processing with GPAC
Process Isolation
linuxRun GPAC in isolated containers or sandboxes to limit impact of crashes
docker run --security-opt=no-new-privileges -v /safe_input:/input gpac_container
🧯 If You Can't Patch
- Implement network segmentation to restrict access to GPAC services
- Deploy application-level firewalls to filter and inspect WAV files before processing
🔍 How to Verify
Check if Vulnerable:
Check GPAC version: gpac -version. If output shows v2.4.0, system is vulnerable.Check Version:
gpac -version 2>/dev/null || gpac --version 2>/dev/null || echo "GPAC not installed"Verify Fix Applied:
After updating, verify version is no longer v2.4.0 and test with known safe WAV files.📡 Detection & Monitoring
Log Indicators:
- GPAC process crashes
- Segmentation fault errors in system logs
- Abnormal termination of media processing jobs
Network Indicators:
- Unusual WAV file uploads to media processing endpoints
- Repeated connection attempts to GPAC services
SIEM Query:
source="*syslog*" AND ("segmentation fault" OR "gpac" AND "crash")