CVE-2024-25376
📋 TL;DR
This vulnerability allows a local attacker to execute arbitrary code by exploiting the MSI-based installer repair mode in Thesycon TUSBAudio software. Attackers with local access can abuse the msiexec.exe repair functionality to run malicious code with elevated privileges. Users of TUSBAudio MSI-based installers before version 5.68.0 are affected.
💻 Affected Systems
- Thesycon TUSBAudio MSI-based installers
📦 What is this software?
Tusbaudio by Thesycon
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative privileges, allowing installation of persistent malware, data theft, or lateral movement within the network.
Likely Case
Local privilege escalation leading to unauthorized software installation, system configuration changes, or credential harvesting.
If Mitigated
Limited impact if proper access controls prevent local users from executing msiexec.exe repair operations or if vulnerable software is not installed.
🎯 Exploit Status
Exploitation requires local access to the system and knowledge of the vulnerability. The repair mode abuse technique is well-documented for MSI installers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.68.0
Vendor Advisory: https://www.thesycon.de/eng/usb_audiodriver.shtml#SecurityAdvisory
Restart Required: Yes
Instructions:
1. Download TUSBAudio version 5.68.0 or later from Thesycon website. 2. Uninstall previous vulnerable versions. 3. Install the updated version. 4. Restart the system to ensure all components are properly loaded.
🔧 Temporary Workarounds
Restrict msiexec.exe execution
windowsUse Group Policy or application control to restrict execution of msiexec.exe repair operations by non-administrative users.
Using Group Policy: Computer Configuration > Windows Settings > Security Settings > Software Restriction Policies
Remove vulnerable software
windowsUninstall TUSBAudio MSI-based installers if not required for operations.
Control Panel > Programs and Features > Uninstall TUSBAudio
🧯 If You Can't Patch
- Implement strict least privilege access controls to prevent local users from executing msiexec.exe repair operations.
- Monitor for suspicious msiexec.exe repair mode executions and implement application whitelisting for critical systems.
🔍 How to Verify
Check if Vulnerable:
Check installed TUSBAudio version via Control Panel > Programs and Features. If version is below 5.68.0 and uses MSI installer, system is vulnerable.Check Version:
wmic product where "name like '%TUSBAudio%'" get versionVerify Fix Applied:
Verify TUSBAudio version is 5.68.0 or higher in Programs and Features, and confirm the installer type is not MSI-based.📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs showing msiexec.exe repair operations on TUSBAudio packages
- Unexpected process creation from msiexec.exe with repair flags
Network Indicators:
- No network indicators - this is a local privilege escalation vulnerability
SIEM Query:
EventID=4688 AND ProcessName='msiexec.exe' AND CommandLine LIKE '%repair%' AND CommandLine LIKE '%TUSBAudio%'