CVE-2023-7245
📋 TL;DR
This vulnerability allows a local user to execute arbitrary code within the nodejs process context of OpenVPN Connect by exploiting the ELECTRON_RUN_AS_NODE environment variable. It affects OpenVPN Connect versions 3.0 through 3.4.3 on Windows and 3.0 through 3.4.7 on macOS. Attackers with local access can escalate privileges or execute malicious code.
💻 Affected Systems
- OpenVPN Connect
📦 What is this software?
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
Connect by Openvpn
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains full control of the system by executing arbitrary code with the privileges of the OpenVPN Connect process, potentially leading to complete system compromise.
Likely Case
Local user executes malicious code to steal credentials, install malware, or pivot to other systems on the network.
If Mitigated
With proper access controls and patching, impact is limited to denial of service or minimal data exposure.
🎯 Exploit Status
Exploitation requires local access to the system. The vulnerability leverages environment variable manipulation which is relatively straightforward for attackers with local access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Windows: 3.4.4+, macOS: 3.4.8+
Vendor Advisory: https://openvpn.net/vpn-server-resources/openvpn-connect-change-log/
Restart Required: Yes
Instructions:
1. Download latest OpenVPN Connect from official website. 2. Uninstall current version. 3. Install updated version. 4. Restart system.
🔧 Temporary Workarounds
Remove local user access
allRestrict local access to systems running vulnerable OpenVPN Connect versions
Disable ELECTRON_RUN_AS_NODE
windowsSet ELECTRON_RUN_AS_NODE environment variable to empty or restricted value
set ELECTRON_RUN_AS_NODE=
🧯 If You Can't Patch
- Restrict local user access to systems running vulnerable OpenVPN Connect
- Monitor for suspicious process creation from OpenVPN Connect executable
🔍 How to Verify
Check if Vulnerable:
Check OpenVPN Connect version in application settings or About dialog. Windows: 3.0-3.4.3, macOS: 3.0-3.4.7 are vulnerable.Check Version:
Windows: Check Help > About in OpenVPN Connect GUI. macOS: OpenVPN Connect > About OpenVPN Connect.Verify Fix Applied:
Verify version is Windows 3.4.4+ or macOS 3.4.8+ in application settings.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from OpenVPN Connect executable
- Suspicious environment variable manipulation
Network Indicators:
- Unusual outbound connections from OpenVPN Connect process
SIEM Query:
Process Creation where Parent Process Name contains 'openvpn' AND Command Line contains unusual parameters🔗 References
- https://openvpn.net/vpn-server-resources/openvpn-connect-for-macos-change-log/
- https://openvpn.net/vpn-server-resources/openvpn-connect-for-windows-change-log/
- https://openvpn.net/vpn-server-resources/openvpn-connect-for-macos-change-log/
- https://openvpn.net/vpn-server-resources/openvpn-connect-for-windows-change-log/
