CVE-2020-19751
📋 TL;DR
CVE-2020-19751 is a heap-based buffer over-read vulnerability in gpac's gf_odf_del_ipmp_tool function that could allow attackers to read sensitive memory contents or cause denial of service. This affects systems running vulnerable versions of gpac multimedia framework. Users processing untrusted media files with gpac are at risk.
💻 Affected Systems
- gpac
📦 What is this software?
Gpac by Gpac
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if combined with other vulnerabilities, or sensitive information disclosure from memory.
Likely Case
Application crash causing denial of service when processing malicious media files.
If Mitigated
Limited impact with proper input validation and memory protection mechanisms enabled.
🎯 Exploit Status
Exploitation requires crafting malicious media files that trigger the buffer over-read.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.9.0 and later
Vendor Advisory: https://github.com/gpac/gpac/issues/1272
Restart Required: Yes
Instructions:
1. Update gpac to version 0.9.0 or later. 2. Recompile any applications using gpac library. 3. Restart affected services.
🔧 Temporary Workarounds
Disable IPMP tool processing
allConfigure gpac to not process IPMP tools in media files
Input validation
allImplement strict validation of media files before processing with gpac
🧯 If You Can't Patch
- Isolate gpac processing to dedicated, restricted environments
- Implement network segmentation to limit potential lateral movement
🔍 How to Verify
Check if Vulnerable:
Check gpac version: gpac -version | grep 'GPAC'Check Version:
gpac -versionVerify Fix Applied:
Verify version is 0.9.0 or later: gpac -version📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Memory access violation errors in system logs
Network Indicators:
- Unusual media file uploads to services using gpac
SIEM Query:
source="*gpac*" AND ("segmentation fault" OR "memory violation" OR "buffer over-read")