CVE-2024-9497
📋 TL;DR
This CVE describes a DLL hijacking vulnerability in the USBXpress 4 SDK installer that allows attackers to execute arbitrary code with elevated privileges. The vulnerability occurs due to an uncontrolled search path, enabling attackers to place malicious DLLs in locations the installer searches. This affects systems where the vulnerable USBXpress 4 SDK installer is present or being executed.
💻 Affected Systems
- USBXpress 4 SDK
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with SYSTEM/root privileges, enabling complete control over the affected system, data theft, and lateral movement within the network.
Likely Case
Local privilege escalation allowing attackers to gain administrative rights on the system where the installer runs, potentially leading to persistence mechanisms and further exploitation.
If Mitigated
Limited impact if proper application whitelisting and DLL search path restrictions are in place, potentially preventing successful exploitation.
🎯 Exploit Status
Requires local access to place malicious DLLs in search paths and execute the installer. Social engineering could trick users into running the installer from untrusted locations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: USBXpress 4 SDK with the vulnerability fixed (specific version not specified in reference)
Vendor Advisory: https://community.silabs.com/068Vm00000JUQwd
Restart Required: No
Instructions:
1. Download the updated USBXpress 4 SDK from Silicon Labs. 2. Uninstall any existing vulnerable versions. 3. Install the updated SDK. 4. Verify the installation uses secure DLL loading paths.
🔧 Temporary Workarounds
Restrict DLL search paths
WindowsConfigure Windows to use safe DLL search mode to prevent loading from current directory
reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager" /v SafeDllSearchMode /t REG_DWORD /d 1 /f
Application whitelisting
allImplement application control policies to prevent unauthorized executables from running
🧯 If You Can't Patch
- Remove or restrict execution of the USBXpress 4 SDK installer from all systems
- Implement strict file system permissions to prevent users from writing DLLs to directories the installer searches
🔍 How to Verify
Check if Vulnerable:
Check if USBXpress 4 SDK installer exists on the system and examine its DLL loading behavior using Process Monitor or similar toolsCheck Version:
Check installer properties or installation directory for version informationVerify Fix Applied:
Verify the updated installer uses secure DLL loading paths and doesn't search current directory first📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs showing DLL loading from unusual locations
- Process creation events for the USBXpress installer
Network Indicators:
- No direct network indicators as this is a local exploit
SIEM Query:
Process creation where image_path contains "USBXpress" AND parent_process contains "explorer.exe" OR "cmd.exe"