DeepChat openExternal RCE via XSS in Electron March 2, 2026 March 2, 2026 The IPVanish VPN application for macOS contains a critical privilege escalation vulnerability that allows any unprivileged local process to execute arbitrary code as root without user interaction. The attack vector requires only local access to the system where IPVanish VPN is installed. An attacker with the ability to execute code as an unprivileged user can exploit this vulnerability to gain complete control over the system. The attack requires no user interaction, no special privileges, and bypasses macOS security features including code signature verification. The core security flaw stems from the privileged helper tool’s failure to authenticate connecting XPC clients, combined with two additional weaknesses: (1) the OpenVPNPath parameter — which specifies the binary the helper launches as root via GCDTask — is accepted directly from the unauthenticated XPC message without any path or signature validation, enabling immediate arbitrary code execution as root; and (2) a logic error in code signature verification that allows unsigned scripts to be copied to root-owned directories and subsequently executed via OpenVPN’s –up hook mechanism as a secondary execution path. Table of Contents Toggle What is IPVanish VPN? IPVanish VPN is a commercial virtual private network application that provides users with encrypted internet connections and privacy protection. The application offers several key features including secure VPN tunneling using the OpenVPN protocol, DNS leak protection through custom DNS configuration, kill switch functionality to prevent data exposure when VPN connections drop, and automatic reconnection capabilities. The application architecture follows a common macOS design pattern for privileged operations, splitting functionality between a user-space application bundle and a privileged helper tool that runs with root privileges. Lab Setup Install IPVanish VPN Application To reproduce this vulnerability, you must first install the IPVanish VPN application on a macOS system running macOS 10.13 (High Sierra) or later. Download the latest version of IPVanish VPN from the official website and complete the installation process. During installation, the application will prompt for administrator credentials to install the privileged helper tool. This is a necessary step as the helper tool must be installed with root privileges in a protected system directory. After installation completes, verify that the privileged helper tool is properly installed and running by executing the following commands: # Verify helper binary exists ls -la /Library/PrivilegedHelperTools/com.ipvanish.osx.vpnhelper # Check LaunchDaemon configuration cat /Library/LaunchDaemons/com.ipvanish.osx.vpnhelper.plist # Verify helper is running sudo launchctl list | grep ipvanish # Check helper process ps aux | grep vpnhelper # Verify helper binary exists ls -la /Library/PrivilegedHelperTools/com.ipvanish.osx.vpnhelper # Check LaunchDaemon configuration cat /Library/LaunchDaemons/com.ipvanish.osx.vpnhelper.plist # Verify helper is running sudo launchctl list | grep ipvanish # Check helper process ps aux | grep vpnhelper The helper binary should exist with the following permissions: -rwxr-xr-x root wheel, indicating it is owned by root and executable by all users. The LaunchDaemon plist should specify that the helper runs on-demand through the MachServices key, making it accessible via XPC. Prepare Exploitation Environment Create a working directory for the proof-of-concept code and payloads. This directory should be writable by your unprivileged user account: # Create working directory mkdir -p ~/ipvanish_research cd ~/ipvanish_research # Create temporary directory for payloads mkdir -p /tmp/ipvanish_exploit # Create working directory mkdir -p ~/ipvanish_research cd ~/ipvanish_research # Create temporary directory for payloads mkdir -p /tmp/ipvanish_exploit Install Xcode Command Line Tools if not already present, as they are required to compile the Objective-C exploitation code: # Install Xcode Command Line Tools xcode-select --install # Install Xcode Command Line Tools xcode-select --install Verify that you have the necessary compilation tools by checking for the presence of clang: # Verify compiler clang --version # Verify compiler clang --version Verification and Testing Infrastructure Before proceeding with exploitation, verify that the XPC service is accessible from unprivileged processes. Create a simple test program to validate XPC connectivity: # Create test connectivity script cat > test_xpc_connection.m << 'EOF' #import <Foundation/Foundation.h> #import <xpc/xpc.h> int main() { @autoreleasepool { NSLog(@"[TEST] Attempting XPC connection..."); xpc_connection_t conn = xpc_connection_create_mach_service( "com.ipvanish.osx.vpnhelper", NULL, 0); if (!conn) { NSLog(@"[FAIL] Could not create connection"); return 1; } xpc_connection_set_event_handler(conn, ^(xpc...