CVE-2023-39616
📋 TL;DR
CVE-2023-39616 is a memory corruption vulnerability in AOMedia's AV1 video codec library (libaom) versions 3.0.0 through 3.5.0. An invalid read memory access in the assign_frame_buffer_p function allows attackers to potentially crash applications or execute arbitrary code by processing specially crafted AV1 video files. This affects any software using vulnerable libaom versions for AV1 video decoding.
💻 Affected Systems
- AOMedia libaom library
- Software using libaom for AV1 decoding (e.g., media players, browsers, video processing tools)
📦 What is this software?
Aomedia by Aomedia
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if exploited in a privileged context like a media server or browser component.
Likely Case
Application crashes (denial of service) when processing malicious AV1 video content, potentially leading to service disruption.
If Mitigated
Limited impact with proper sandboxing and privilege separation, potentially only causing crashes in isolated processes.
🎯 Exploit Status
Exploitation requires processing malicious AV1 video files; no public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.5.1 and later
Vendor Advisory: https://aomedia.googlesource.com/aom/+/refs/tags/v3.5.1
Restart Required: Yes
Instructions:
1. Update libaom to version 3.5.1 or later. 2. Rebuild or update any software using libaom. 3. Restart affected services or applications.
🔧 Temporary Workarounds
Disable AV1 video processing
allTemporarily disable AV1 video decoding in applications until patched.
Application-specific configuration required
🧯 If You Can't Patch
- Implement strict input validation for AV1 video files
- Run vulnerable software in sandboxed/isolated environments
🔍 How to Verify
Check if Vulnerable:
Check libaom version: `aomenc --version` or `aomdec --version`; if output shows 3.0.0-3.5.0, system is vulnerable.Check Version:
aomenc --version 2>&1 | grep -i versionVerify Fix Applied:
Verify libaom version is 3.5.1 or later using the same commands.📡 Detection & Monitoring
Log Indicators:
- Application crashes or segmentation faults when processing AV1 video files
- Memory access violation errors in application logs
Network Indicators:
- Unusual AV1 video file transfers to systems with vulnerable libaom
SIEM Query:
Search for process crashes with libaom or AV1-related components in system/application logs.