CVE-2024-57426
📋 TL;DR
NetMod VPN Client 5.3.1 is vulnerable to DLL injection, allowing attackers to execute arbitrary code by placing malicious DLLs in directories where the application loads dependencies. This affects users running the vulnerable version of NetMod VPN Client on Windows systems.
💻 Affected Systems
- NetMod VPN Client
⚠️ 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 attacker gaining administrative privileges, data theft, and persistent backdoor installation.
Likely Case
Local privilege escalation leading to unauthorized access to VPN credentials and network resources.
If Mitigated
Limited impact with proper file permissions and application isolation preventing DLL placement.
🎯 Exploit Status
Requires local access to place malicious DLL and knowledge of application's DLL loading behavior.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.3.2 or later
Vendor Advisory: https://sourceforge.net/projects/netmodhttp/
Restart Required: No
Instructions:
1. Download latest version from official source. 2. Uninstall current version. 3. Install updated version. 4. Verify version is 5.3.2 or higher.
🔧 Temporary Workarounds
Restrict DLL loading directories
WindowsSet strict file permissions on directories where NetMod VPN Client loads DLLs to prevent unauthorized writes.
icacls "C:\Program Files\NetMod VPN\" /deny Everyone:(OI)(CI)(W)
🧯 If You Can't Patch
- Remove local user write permissions from NetMod VPN installation directory
- Use application whitelisting to prevent execution of unauthorized DLLs
🔍 How to Verify
Check if Vulnerable:
Check if NetMod VPN Client version is 5.3.1 via Control Panel > Programs and Features.Check Version:
wmic product where name="NetMod VPN Client" get versionVerify Fix Applied:
Verify version is 5.3.2 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Unusual DLL loading from non-standard directories
- Failed DLL load attempts from restricted paths
Network Indicators:
- Unexpected outbound connections from NetMod VPN process
SIEM Query:
Process Creation where Image contains "netmod" and CommandLine contains "dll"