CVE-2021-34184
📋 TL;DR
CVE-2021-34184 is a double-free vulnerability in Miniaudio's ma_default_vfs_close__stdio function that can lead to buffer overflow and potential remote code execution. This affects applications using Miniaudio library version 0.10.35 for audio processing. Developers integrating Miniaudio into their software are primarily affected.
💻 Affected Systems
- Miniaudio library
- Applications using Miniaudio library
📦 What is this software?
Miniaudio by Mackron
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution allowing complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crash leading to denial of service, with potential for memory corruption and limited code execution.
If Mitigated
Application crash without code execution if ASLR/DEP protections are effective.
🎯 Exploit Status
Exploitation requires triggering the double-free condition through crafted audio file processing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 0.10.36 and later
Vendor Advisory: https://github.com/mackron/miniaudio/issues/319
Restart Required: Yes
Instructions:
1. Update Miniaudio to version 0.10.36 or later. 2. Recompile applications using the library. 3. Restart affected services.
🔧 Temporary Workarounds
Disable vulnerable file operations
allAvoid using ma_default_vfs_close__stdio function in code
Input validation
allImplement strict validation of audio file inputs before processing
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Deploy application allowlisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check if application uses Miniaudio version 0.10.35 by examining dependencies or build configuration.Check Version:
Check library version in source code or build configuration files.Verify Fix Applied:
Verify Miniaudio version is 0.10.36+ and application has been recompiled with updated library.📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory corruption errors
- Unexpected process termination during audio file processing
Network Indicators:
- Unusual network connections from audio processing services
- Large volume of audio file uploads to vulnerable endpoints
SIEM Query:
Process termination events from audio processing applications OR memory access violation alerts