CVE-2024-8474
📋 TL;DR
OpenVPN Connect versions before 3.5.0 log the configuration profile's private key in clear text within application logs. This allows unauthorized actors with access to these logs to decrypt VPN traffic, compromising confidentiality. All users of OpenVPN Connect on affected versions are vulnerable.
💻 Affected Systems
- OpenVPN Connect
📦 What is this software?
Connect by Openvpn
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains access to application logs, extracts the private key, and decrypts all VPN traffic, leading to data theft, credential harvesting, and network infiltration.
Likely Case
Local or remote attackers with log access decrypt intercepted VPN traffic, exposing sensitive data transmitted over the VPN.
If Mitigated
With proper log access controls and monitoring, risk is reduced, but the vulnerability still exists if logs are compromised.
🎯 Exploit Status
Exploitation requires access to application logs; no authentication bypass needed if logs are accessible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.5.0 and later
Vendor Advisory: https://openvpn.net/connect-docs/android-release-notes.html
Restart Required: No
Instructions:
1. Update OpenVPN Connect to version 3.5.0 or later via official app stores or vendor channels. 2. Verify the update completes successfully. 3. No restart is required, but ensure the app is reloaded.
🔧 Temporary Workarounds
Restrict Log Access
allLimit access to OpenVPN Connect application logs to authorized personnel only.
Disable Detailed Logging
allConfigure OpenVPN Connect to minimize or disable logging of sensitive information.
🧯 If You Can't Patch
- Monitor and restrict access to application logs containing OpenVPN data.
- Use network segmentation to limit exposure of VPN traffic to untrusted networks.
🔍 How to Verify
Check if Vulnerable:
Check the OpenVPN Connect version in app settings or via 'openvpn --version' on command-line; versions below 3.5.0 are vulnerable.Check Version:
openvpn --versionVerify Fix Applied:
Confirm the version is 3.5.0 or higher and check logs for absence of clear-text private keys.📡 Detection & Monitoring
Log Indicators:
- Log entries containing 'BEGIN PRIVATE KEY' or similar clear-text key patterns in OpenVPN logs.
Network Indicators:
- Unusual decryption attempts or traffic interception patterns on VPN connections.
SIEM Query:
source="openvpn.log" AND "BEGIN PRIVATE KEY"