CVE-2023-0770
📋 TL;DR
This CVE describes a stack-based buffer overflow vulnerability in GPAC multimedia framework versions prior to 2.2. Attackers can exploit this by crafting malicious media files to execute arbitrary code or cause denial of service. Users and applications that process untrusted media files with vulnerable GPAC versions are 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 with the privileges of the application using GPAC, potentially leading to full system compromise.
Likely Case
Application crash (denial of service) when processing malicious media files.
If Mitigated
Limited to denial of service if memory protections like ASLR/DEP are enabled and properly configured.
🎯 Exploit Status
Exploitation requires crafting a malicious media file that triggers the buffer overflow. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2 and later
Vendor Advisory: https://github.com/gpac/gpac/security/advisories
Restart Required: Yes
Instructions:
1. Download GPAC version 2.2 or later from https://github.com/gpac/gpac/releases
2. Compile and install according to platform instructions
3. Restart any services or applications using GPAC
🔧 Temporary Workarounds
Input validation for media files
allImplement strict validation of media file inputs before processing with GPAC
Memory protection hardening
linuxEnable ASLR, DEP, and stack canaries on systems using GPAC
echo 2 > /proc/sys/kernel/randomize_va_space
sysctl -w kernel.exec-shield=1
🧯 If You Can't Patch
- Isolate GPAC usage to dedicated systems with minimal privileges
- Implement network segmentation to limit access to systems processing media files
🔍 How to Verify
Check if Vulnerable:
Check GPAC version with 'gpac -version' or 'MP4Box -version' and verify it's below 2.2Check Version:
gpac -version 2>&1 | head -1Verify Fix Applied:
Confirm version is 2.2 or higher with 'gpac -version' and test with known safe media files📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from GPAC processes
- Abnormal termination of media processing applications
Network Indicators:
- Unusual media file uploads to web applications
- Large media file transfers to internal systems
SIEM Query:
process_name:"gpac" OR process_name:"MP4Box" AND (event_type:"crash" OR exit_code:139)🔗 References
- https://github.com/gpac/gpac/commit/c31941822ee275a35bc148382bafef1c53ec1c26
- https://huntr.dev/bounties/e0fdeee5-7909-446e-9bd0-db80fd80e8dd
- https://www.debian.org/security/2023/dsa-5411
- https://github.com/gpac/gpac/commit/c31941822ee275a35bc148382bafef1c53ec1c26
- https://huntr.dev/bounties/e0fdeee5-7909-446e-9bd0-db80fd80e8dd
- https://www.debian.org/security/2023/dsa-5411
