CVE-2024-47834
📋 TL;DR
A use-after-free vulnerability in GStreamer's Matroska demuxer allows reading freed memory when processing CodecPrivate elements. This can lead to crashes, information disclosure, or potentially code execution. Any application using GStreamer to process Matroska media files is affected.
💻 Affected Systems
- GStreamer
- Applications using GStreamer library
📦 What is this software?
Gstreamer by Gstreamer Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if combined with other vulnerabilities or memory corruption techniques.
Likely Case
Application crashes (denial of service) or information disclosure from freed memory contents.
If Mitigated
Application crash with minimal data exposure if memory protections are enabled.
🎯 Exploit Status
Exploitation requires crafting malicious Matroska files. No public exploits known as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.24.10
Vendor Advisory: https://gstreamer.freedesktop.org/security/sa-2024-0030.html
Restart Required: Yes
Instructions:
1. Update GStreamer to version 1.24.10 or later. 2. Restart all applications using GStreamer. 3. Rebuild any applications statically linked to GStreamer.
🔧 Temporary Workarounds
Disable Matroska processing
allBlock or filter Matroska file processing in applications
Configure applications to reject .mkv/.webm files
Use file type filtering at network boundaries
Memory hardening
allEnable ASLR and other memory protections
sysctl -w kernel.randomize_va_space=2
Enable DEP/ASLR in Windows
🧯 If You Can't Patch
- Isolate media processing to dedicated systems with restricted network access
- Implement strict file upload validation rejecting Matroska files
🔍 How to Verify
Check if Vulnerable:
Check GStreamer version: gst-inspect-1.0 --versionCheck Version:
gst-inspect-1.0 --versionVerify Fix Applied:
Confirm version is 1.24.10 or higher: gst-inspect-1.0 --version | grep -q '1.24.10\|1.25\|2.'📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Memory access violation errors in logs
Network Indicators:
- Unexpected Matroska file uploads to media processing endpoints
SIEM Query:
source="application.logs" AND ("segmentation fault" OR "SIGSEGV") AND process="*gstreamer*"