CVE-2024-31002
📋 TL;DR
A buffer overflow vulnerability in Bento4 v1.6.0-641 allows remote attackers to execute arbitrary code via the AP4 BitReader::ReadCache() function. This affects any application using the vulnerable Bento4 library for MP4 file processing. Attackers can achieve remote code execution by crafting malicious MP4 files.
💻 Affected Systems
- Bento4
- Applications using Bento4 library
📦 What is this software?
Bento4 by Axiosys
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Remote code execution on systems processing untrusted MP4 files, potentially leading to lateral movement within networks.
If Mitigated
Denial of service or application crash if exploit fails or memory protections are in place.
🎯 Exploit Status
Exploit requires crafting a malicious MP4 file. Public proof-of-concept exists in GitHub references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub repository for latest patched version
Vendor Advisory: https://github.com/axiomatic-systems/Bento4/issues/939
Restart Required: Yes
Instructions:
1. Update Bento4 to latest version from official repository. 2. Rebuild any applications using Bento4 library. 3. Restart affected services.
🔧 Temporary Workarounds
Input Validation
allImplement strict validation of MP4 files before processing
Memory Protection
linuxEnable ASLR and DEP/PaX to reduce exploit success
sysctl -w kernel.randomize_va_space=2
echo 1 > /proc/sys/kernel/exec-shield
🧯 If You Can't Patch
- Isolate systems using Bento4 in network segments with strict egress filtering
- Implement application allowlisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check Bento4 version: bento4 --version or examine library version in applicationsCheck Version:
bento4 --versionVerify Fix Applied:
Verify updated version is installed and test with known malicious MP4 samples📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unusual process spawning from media applications
Network Indicators:
- Large MP4 file uploads followed by outbound connections
- Unusual network traffic from media processing servers
SIEM Query:
process_name:"bento4" AND (event_type:crash OR parent_process:unusual)