CVE-2020-23267
📋 TL;DR
This vulnerability in GPAC 0.8.0 allows attackers to cause a heap-based buffer overflow by processing a specially crafted media file. This can lead to denial of service (crashing the application) and potentially remote code execution. Anyone using GPAC to process untrusted media files is affected.
💻 Affected Systems
- GPAC (GPAC Project on Advanced Content)
📦 What is this software?
Gpac by Gpac
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution allowing full system compromise if the overflow can be controlled to execute arbitrary code.
Likely Case
Denial of service through application crash when processing malicious media files.
If Mitigated
Limited to application crash if exploit controls prevent code execution.
🎯 Exploit Status
Exploit requires crafting a malicious media file that triggers the buffer overflow in gf_hinter_track_process function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 0.8.0
Vendor Advisory: https://github.com/gpac/gpac/issues/1479
Restart Required: Yes
Instructions:
1. Update GPAC to latest version. 2. Rebuild from source if using custom builds. 3. Restart any services using GPAC.
🔧 Temporary Workarounds
Disable media file processing
allPrevent GPAC from processing untrusted media files
Input validation
allImplement strict file type validation before processing
🧯 If You Can't Patch
- Implement strict access controls to prevent untrusted media file uploads
- Use application sandboxing or containerization to limit potential damage
🔍 How to Verify
Check if Vulnerable:
Check GPAC version with 'gpac -version' or 'gpac --version'Check Version:
gpac -version 2>&1 | head -1Verify Fix Applied:
Verify version is newer than 0.8.0 and test with known malicious sample📡 Detection & Monitoring
Log Indicators:
- GPAC process crashes
- Segmentation fault errors in system logs
- Abnormal termination of media processing
Network Indicators:
- Unusual media file uploads to systems using GPAC
SIEM Query:
process_name:"gpac" AND (event_type:crash OR error_message:"segmentation fault")