CVE-2023-44446

What it actually does

Use-after-free condition during MXF video file parsing in GStreamer allows an attacker to execute arbitrary code in the context of the process handling the malformed file.

Why it matters to the business

Successful exploitation can lead to full compromise of systems that process MXF media files, enabling attackers to run malicious code, exfiltrate data, or disrupt media workflows across any organization using the library.

How an attack unfolds

An attacker creates a specially crafted MXF file that triggers the use-after-free during object parsing. The victim application loads or transcodes the file using GStreamer, allowing the attacker to control freed memory and execute arbitrary code without requiring authentication.

How to fix it

Update GStreamer to the commit 4d13eddc8b6d3f42ba44682ba42048acf170547f or later. Rebuild and redeploy all dependent applications. Until patched, restrict processing of untrusted MXF files.

How to confirm the fix worked

Verify the installed GStreamer version or commit hash against 4d13eddc8b6d3f42ba44682ba42048acf170547f. Test with known-good and malformed MXF samples in a sandbox to confirm no crashes or unexpected behavior occur.

Typical attack path

1. Craft malicious MXF file exploiting missing object validation
2. Deliver file via web download, email attachment, or shared storage
3. Victim application opens or processes the file with GStreamer
4. Use-after-free is triggered during MXF demuxing
5. Attacker gains code execution in the current process context

How to detect it

Review application logs and crash reports for MXF parsing errors or segmentation faults around the time of suspected incidents. Correlate with file access to untrusted MXF sources.

What your security team should do

• Immediately update all GStreamer installations to the fixed commit
• Scan internal media pipelines and third-party tools for GStreamer usage
• Implement file-type restrictions or sandboxing for MXF processing until patches are applied
• Monitor EPSS and KEV status for any future changes in exploit availability