CVE-2023-34318
📋 TL;DR
A heap buffer overflow vulnerability in sox's hcom.c file allows attackers to write beyond allocated memory boundaries. This can lead to denial of service, arbitrary code execution, or information disclosure. Systems using vulnerable sox versions for audio processing are affected.
💻 Affected Systems
- sox (Sound eXchange)
📦 What is this software?
Extra Packages For Enterprise Linux by Fedoraproject
View all CVEs affecting Extra Packages For Enterprise Linux →
Fedora by Fedoraproject
Sound Exchange by Sound Exchange Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with attacker gaining full control of the system, potentially leading to complete compromise and data exfiltration.
Likely Case
Denial of service through application crashes, with potential for information disclosure via memory leaks.
If Mitigated
Application crashes without code execution if memory protections like ASLR are enabled, limiting impact to availability.
🎯 Exploit Status
Exploitation requires crafting malicious HCOM audio files. Public proof-of-concept demonstrates crash/DoS, but full RCE may require additional exploitation techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 14.4.3 and later
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2023-34318
Restart Required: No
Instructions:
1. Update sox package using system package manager. 2. For Linux: 'sudo apt update && sudo apt upgrade sox' (Debian/Ubuntu) or 'sudo yum update sox' (RHEL/CentOS). 3. For source installations: Download and compile sox 14.4.3+ from official repository.
🔧 Temporary Workarounds
Disable HCOM format support
linuxRemove or disable HCOM audio format processing in sox configuration
Recompile sox without HCOM support using './configure --without-hcom'
Restrict file processing
allImplement input validation to reject untrusted HCOM files
Add file type validation before processing: 'file --mime-type input.hcom | grep -v audio/x-hcom'
🧯 If You Can't Patch
- Implement strict input validation for audio files, rejecting all HCOM format files from untrusted sources
- Run sox in sandboxed environments with limited privileges and memory restrictions
🔍 How to Verify
Check if Vulnerable:
Check sox version: 'sox --version' and verify if below 14.4.3Check Version:
sox --versionVerify Fix Applied:
Confirm version is 14.4.3 or higher: 'sox --version | grep -q "14.4.3\|14.4.4\|14.5" && echo "Patched"'📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in system logs when sox processes audio files
- Abnormal memory usage patterns during audio processing
Network Indicators:
- Unusual uploads of HCOM audio files to web applications
- Network transfers of crafted audio files to processing servers
SIEM Query:
source="*syslog*" AND ("segmentation fault" OR "SIGSEGV") AND process="sox"