CVE-2025-70307
📋 TL;DR
A stack overflow vulnerability in GPAC's dump_ttxt_sample function allows attackers to cause Denial of Service by sending specially crafted packets. This affects systems running vulnerable versions of GPAC multimedia framework. The vulnerability can crash the application, disrupting media processing services.
💻 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 dependent media processing pipelines and services.
Likely Case
Denial of Service causing application crashes when processing malicious media files or streams.
If Mitigated
Limited impact with proper input validation and memory protection mechanisms in place.
🎯 Exploit Status
Proof of concept available on GitHub demonstrates exploitation via crafted packets.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not yet released
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Monitor GPAC releases for security updates. 2. Apply patch when available. 3. Restart affected services.
🔧 Temporary Workarounds
Input Validation Filter
linuxImplement network filtering to block suspicious media packets before they reach GPAC.
# Configure firewall rules to restrict incoming media streams
# Example: iptables -A INPUT -p tcp --dport [GPAC_PORT] -m string --string "suspicious_pattern" --algo bm -j DROP
Memory Protection
linuxEnable stack protection mechanisms like ASLR and stack canaries.
# Enable ASLR: sysctl -w kernel.randomize_va_space=2
# Compile with stack protection: gcc -fstack-protector-all
🧯 If You Can't Patch
- Isolate GPAC services in restricted network segments
- Implement strict input validation for media files before processing
🔍 How to Verify
Check if Vulnerable:
Check GPAC version: gpac -version. If version is 2.4.0, system is vulnerable.Check Version:
gpac -version 2>&1 | grep -i versionVerify Fix Applied:
After patching, verify version is updated beyond 2.4.0 and test with known malicious samples.📡 Detection & Monitoring
Log Indicators:
- GPAC process crashes
- Segmentation fault errors in system logs
- Abnormal termination of media processing services
Network Indicators:
- Unusual media packet patterns
- Multiple connection attempts to GPAC ports with malformed data
SIEM Query:
source="*syslog*" AND ("segmentation fault" OR "gpac" AND "crash")