CVE-2018-7715
📋 TL;DR
CVE-2018-7715 is a privilege escalation vulnerability in PrivateVPN for macOS that allows local attackers to execute arbitrary code with root privileges. The vulnerability exists in the privileged helper tool's XPC service, which accepts malicious path strings pointing to attacker-controlled binaries. This affects macOS users running PrivateVPN 2.0.31.
💻 Affected Systems
- PrivateVPN
📦 What is this software?
Privatevpn by Privatevpn
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level persistence, data theft, and lateral movement capabilities.
Likely Case
Local privilege escalation leading to installation of malware, keyloggers, or backdoors on the affected system.
If Mitigated
Limited impact if proper application whitelisting and privilege separation are implemented.
🎯 Exploit Status
Exploitation requires local access to the system. The vulnerability is well-documented with technical details available in public advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2.0.31
Vendor Advisory: https://github.com/VerSprite/research/blob/master/advisories/VS-2018-005.md
Restart Required: Yes
Instructions:
1. Uninstall PrivateVPN 2.0.31. 2. Download and install the latest version from the official PrivateVPN website. 3. Restart the system to ensure all components are updated.
🔧 Temporary Workarounds
Disable PrivateVPN Helper Tool
macOSRemove or disable the vulnerable XPC service to prevent exploitation
sudo launchctl unload /Library/LaunchDaemons/com.privat.vpn.helper.plist
sudo rm /Library/LaunchDaemons/com.privat.vpn.helper.plist
sudo rm /Library/PrivilegedHelperTools/com.privat.vpn.helper
Uninstall PrivateVPN
macOSCompletely remove the vulnerable software
sudo /Applications/PrivateVPN.app/Contents/Resources/uninstall.sh
sudo rm -rf /Applications/PrivateVPN.app
🧯 If You Can't Patch
- Implement strict application control policies to prevent unauthorized binary execution
- Use privilege separation and limit user accounts to standard privileges only
🔍 How to Verify
Check if Vulnerable:
Check if PrivateVPN 2.0.31 is installed: ls -la /Applications/ | grep PrivateVPNCheck Version:
Check application version in /Applications/PrivateVPN.app/Contents/Info.plist or via GUIVerify Fix Applied:
Verify PrivateVPN version is greater than 2.0.31 and check that com.privat.vpn.helper is not running: launchctl list | grep privat📡 Detection & Monitoring
Log Indicators:
- Unusual XPC service connections to com.privat.vpn.helper
- Execution of unexpected binaries with root privileges
Network Indicators:
- Local privilege escalation typically doesn't generate network traffic
SIEM Query:
process_name:com.privat.vpn.helper AND parent_process:NOT(PrivateVPN) OR privilege_escalation:true AND process_path:contains(/tmp/)