CVE-2023-0819
📋 TL;DR
This CVE describes a heap-based buffer overflow vulnerability in the GPAC multimedia framework. Attackers can exploit this to execute arbitrary code or cause denial of service by sending specially crafted media files. Users of GPAC versions prior to v2.3.0-DEV are affected.
💻 Affected Systems
- GPAC Multimedia Framework
📦 What is this software?
Gpac by Gpac
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crash causing denial of service, potentially leading to service disruption.
If Mitigated
Contained application crash with no privilege escalation if proper sandboxing and memory protections are enabled.
🎯 Exploit Status
Exploitation requires crafting specific media files that trigger the buffer overflow condition.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.3.0-DEV and later
Vendor Advisory: https://github.com/gpac/gpac/commit/d067ab3ccdeaa340e8c045a0fd5bcfc22b809e8f
Restart Required: Yes
Instructions:
1. Update GPAC to version v2.3.0-DEV or later. 2. Rebuild any applications using GPAC libraries. 3. Restart affected services.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for media files before processing with GPAC.
Sandbox Execution
linuxRun GPAC processes in sandboxed environments with limited privileges.
firejail --net=none --private gpac [args]
🧯 If You Can't Patch
- Implement network segmentation to isolate GPAC servers from critical systems
- Deploy application allowlisting to prevent execution of unauthorized code
🔍 How to Verify
Check if Vulnerable:
Check GPAC version with 'gpac -version' or 'gpac -h' and verify it's earlier than v2.3.0-DEV.Check Version:
gpac -version 2>/dev/null || gpac -h 2>/dev/null | head -1Verify Fix Applied:
Confirm version is v2.3.0-DEV or later and test with known safe media files.📡 Detection & Monitoring
Log Indicators:
- GPAC process crashes
- Segmentation fault errors in system logs
- Abnormal memory usage patterns
Network Indicators:
- Unusual media file uploads to applications using GPAC
- Multiple failed processing attempts
SIEM Query:
process_name:"gpac" AND (event_type:crash OR error_message:"segmentation fault")🔗 References
- https://github.com/gpac/gpac/commit/d067ab3ccdeaa340e8c045a0fd5bcfc22b809e8f
- https://huntr.dev/bounties/35793610-dccc-46c8-9f55-6a24c621e4ef
- https://www.debian.org/security/2023/dsa-5411
- https://github.com/gpac/gpac/commit/d067ab3ccdeaa340e8c045a0fd5bcfc22b809e8f
- https://huntr.dev/bounties/35793610-dccc-46c8-9f55-6a24c621e4ef
- https://www.debian.org/security/2023/dsa-5411
